1. The utility model provides a fracturing section full flow shale crackle test system of shooing which characterized in that: including bottom plate, table surface, shale fracturing device, shale section device and shale crackle image device, the bottom plate is fixed subaerial, and table surface's bottom is through first stand fixed mounting at the upper surface right side portion of bottom plate all around, and shale fracturing device fixed mounting is at the upper surface left side portion of bottom plate, and equal fixed mounting of shale section device and shale crackle image device is on table surface.

2. The fracturing slice photographing full-flow shale crack testing system according to claim 1, wherein: the shale fracturing device comprises two first circular support plates, a fracturing fluid tank, an air pump, a fracturing cylinder body, a gas collecting circular tank, a plurality of sets of fracturing lever assemblies and two fracturing pistons, wherein the two first circular support plates are horizontally arranged side by side from top to bottom, a plurality of vertical support rods arranged in a circumferential array are fixedly connected between the two first circular support plates, a plurality of supporting lug plates arranged in a circumferential array are integrally formed on the outer circumferences of the two first circular support plates, the bottom of each supporting lug plate on the lower side is fixedly supported on the left side part of the upper surface of the base plate through a second stand column, the bottom of the fracturing fluid tank is fixedly mounted on the top of the upper first circular support plate through a plurality of third stand columns, the air pump is fixedly mounted on the top of the fracturing fluid tank, the fracturing cylinder body is vertically arranged in the middle of the two first circular support plates in the same center, and the middle part of the outer circumference of the fracturing cylinder body is fixedly connected with a second circular support plate in an integral forming manner, each vertical supporting rod penetrates through the second circular supporting plate and is fixedly connected with the second circular supporting plate, the gas collecting ring box is concentrically sleeved outside the second circular supporting plate, the inner circumference of the gas collecting ring box and the outer circumference of the second circular supporting plate are fixedly connected through a plurality of horizontal long supporting plates in a circumferential array, each set of fracturing lever component circumferential array is arranged outside the fracturing cylinder body and is arranged on the two first circular supporting plates, the two fracturing pistons are respectively arranged at the upper part and the lower part in the pressure cylinder body in an up-and-down symmetrical sliding manner, each set of fracturing lever component drives the two fracturing pistons to synchronously and reversely slide up and down, an air inlet of the air pump is connected with an air exhaust pipe communicated with the outside atmosphere, an air outlet of the air pump is fixedly connected with an air delivery pipe, the lower end of the air delivery pipe is fixedly connected to the right side of the top of the gas collecting ring box, the center of the bottom of the fracturing liquid box is fixedly connected with a vertically arranged liquid discharge pipe, and a liquid discharge valve is arranged on the liquid discharge pipe, the gas collection ring box is respectively connected with each group of fracturing lever assemblies, and the left side part of the upper surface of the bottom plate is fixedly connected with a flexible material receiving disc positioned right below the first ring support plate on the lower side.

3. The fracturing slice photographing full-flow shale crack testing system according to claim 2, wherein: the upper surface of the upper fracturing piston and the lower surface of the lower fracturing piston are fixedly connected with a plurality of force application rods arranged in a circumferential array, and the force application rods are vertically arranged;

the vertical fixed mounting that runs through in center of the fracturing piston of upside has the feed liquor pipe that is located under the fluid-discharge tube, and the lower extreme of feed liquor pipe flushes with the lower surface of the fracturing piston of upside, and the upside position of feed liquor pipe is in the top of the fracturing piston of upside, and the last side of feed liquor pipe is provided with the feed liquor valve, and the upper end of feed liquor pipe is big-end-up's horn structure.

4. The fracturing slice photographing full-flow shale crack testing system according to claim 3, wherein: the left set of fracturing lever assembly comprises a force application cylinder body and two sets of lever mechanisms, the force application cylinder body is vertically arranged on the left side outside the gas collection ring box, the two sets of lever mechanisms are vertically symmetrical and are arranged along the left and right direction, the inside of the force application cylinder body is divided into two chambers which are vertically symmetrical through a partition plate, force application pistons are respectively and slidably arranged in the two chambers, the top center of the force application piston on the upper side and the bottom center of the force application piston on the lower side are respectively and fixedly connected with a piston rod which is vertically arranged, the upper end of the piston rod on the upper side upwards penetrates through the top plate center of the force application cylinder body, the lower end of the piston rod on the lower side downwards penetrates through the bottom plate center of the force application cylinder body, the lever mechanism on the upper side is obliquely arranged in a left-low-right-high mode, hinged supports are respectively and fixedly arranged at the bottoms of the supporting ear plates on the upper side and the bottom of the supporting ear plates on the lower side, and the upper side of the right side of the lever mechanism on the upper side is hinged supports on the left-upper side, the left end of the upper lever mechanism is hinged with the upper end of the upper piston rod, the right end of the upper lever mechanism is hinged with the upper end of the left upper force application rod, the lower side of the right side part of the lower lever mechanism is hinged on the hinged support at the left lower side, the left end of the lower lever mechanism is hinged with the lower end of the lower piston rod, the right end of the lower lever mechanism is hinged with the lower end of the left lower force application rod, the upper cavity is connected with the gas collecting ring box through a first C-shaped pipe, the lower cavity is connected with the gas collecting ring box through a second C-shaped pipe, and the first C-shaped pipe and the second C-shaped pipe are vertically arranged;

the left end of the upper pipe of the first C-shaped pipe is fixedly arranged on the upper side part of the left side wall of the force application cylinder body and is communicated with the upper part of the upper chamber, the left end of the lower pipe of the first C-shaped pipe is fixedly arranged on the upper side of the middle part of the left side wall of the force application cylinder body and is communicated with the lower part of the upper chamber, the upper pipe and the lower pipe of the first C-shaped pipe are both provided with a first electronic ball valve, the middle part of the right pipe of the first C-shaped pipe is fixedly connected with a first L-shaped pipe, the lower end of the first L-shaped pipe is fixedly connected with the left side of the top part of the gas collection ring box, the left end of the upper pipe of the second C-shaped pipe is fixedly arranged on the lower side of the middle part of the left side wall of the force application cylinder body and is communicated with the lower part of the chamber, the left end of the lower pipe of the second C-shaped pipe is fixedly arranged on the lower side wall of the lower side of the force application cylinder body and is communicated with the lower part of the chamber, and the upper pipe and the lower pipe of the second C-shaped pipe are both provided with a second electronic ball valve, the middle part of the right side pipe of the second C-shaped pipe is fixedly connected with a second L-shaped pipe, and the upper end of the second L-shaped pipe is fixedly connected to the left side of the bottom of the gas collecting ring box.

5. The fracturing slice photographing full-flow shale crack testing system according to claim 4, wherein: the upper lever mechanism comprises a cuboid rod and two insertion rods, wherein the middle part of the cuboid rod is provided with insertion through holes which are through from left to right along the length direction, the two insertion rods are symmetrically arranged at the left and right sides of the cuboid rod from left to right, the right side part of the left insertion rod and the left side part of the right insertion rod are respectively provided with a runway-shaped pin hole which is through from top to bottom, the right side part of the left insertion rod is correspondingly inserted in the left end part of the insertion through hole in a sliding manner, the left side part of the right insertion rod is correspondingly inserted in the right end part of the insertion through hole in a sliding manner, the left side part and the right side part of the cuboid rod are respectively and fixedly provided with a bolt which vertically penetrates through the cuboid rod, the left bolt correspondingly penetrates through the runway-shaped pin hole at the left side, the right side bolt correspondingly penetrates through the runway-shaped pin hole at the right side, the right side part of, the right end of the right insertion rod is hinged with the upper end of the force application rod on the upper left side.

6. The fracturing slice photographing full-flow shale crack testing system according to claim 1, wherein: the shale slicing device comprises a slicing platform, a bench clamp, a vertical support frame, a lifting support frame, two guide rods, a C-shaped support frame, linear sawteeth, a rotary speed-reducing motor, a first rotary table and a second rotary table, wherein the periphery of the bottom of the slicing platform is fixedly supported on the left side part of the upper surface of a working table through a first vertical support leg, the bench clamp is fixedly arranged on the upper surface of the slicing platform, a fixed shell is clamped on the bench clamp, the vertical support frame and the lifting support frame are fixedly arranged on the upper surface of the working table, the vertical support frame is positioned on the rear side of the slicing platform, the lifting support frame is positioned on the front side of the slicing platform, the two guide rods are horizontally arranged along the front-rear direction, the two guide rods are arranged right above the bench clamp in parallel from left to right, a door frame type support is hinged to the top of the vertical support frame, the door frame type support and a hinged shaft of the vertical support frame are horizontally arranged along the left-right direction, the rear ends of the two guide rods are fixedly arranged on the door frame type support, the front sides of the two guide rods are provided with vertical support plates, the front ends of the two guide rods are fixedly connected on the vertical support plates, the middle parts of the vertical support plates are fixedly connected with horizontal support rods which are arranged along the front-back direction and are positioned at the front sides of the vertical support plates, the front ends of the horizontal support rods are fixedly provided with limit balls, the front side parts of the horizontal support rods are supported at the top parts of the lifting support frames, the left side, the right side and the lower side of the C-shaped support frame are all open, the C-shaped support frame is arranged below the two guide rods, two slide seats which are arranged side by side in front and back are fixedly connected on an upper side cross rod of the C-shaped support frame, each slide seat is fixedly provided with two linear bearings, the two linear bearings are respectively sleeved and slid on the two guide rods correspondingly, linear sawteeth are fixedly connected between the lower ends of the two vertical rods of the C-shaped support frame, the rotary speed reduction motor is fixedly arranged at the rear side of the middle part of the upper surface of the bottom plate, the rear side of the middle part of the upper surface of the bottom plate is fixedly provided with a fourth upright post positioned between the rotary speed reduction motor and the vertical support frame, the fixed bearing frame that is provided with in top of fourth stand, rotate on the bearing frame and install the pivot that sets up along left right direction level, the pivot runs through the bearing frame, first carousel fixed mounting is at the left end of pivot, second carousel fixed mounting is at the right-hand member of pivot, the diameter of first carousel is less than the diameter of second carousel, rotary speed reducer's power shaft left end fixed mounting has the third carousel, the cover is equipped with the drive belt between first carousel and the third carousel, the right flank eccentric section of second carousel articulates there is the connecting rod that sets up along the fore-and-aft direction, the front end of connecting rod articulates at the vertical pole middle part rear side in rear side of C type support.

7. The fracturing slice photographing full-flow shale crack testing system according to claim 6, wherein: lifting support frame includes vertical tubular column and vertical lifter, the fixed disc base that is provided with in bottom of vertical tubular column, disc base fixed mounting is anterior at table surface's upper surface left side, the lower lateral part of vertical lifter is pegged graft in vertical tubular column, the upper end of vertical lifter upwards stretches out the top of vertical tubular column and fixes and be provided with the front side, the equal open circular arc extension board of rear side and upside, lateral part threaded mounting has fastening bolt on the lateral wall of vertical tubular column, fastening bolt's the fixed turning handle that is provided with in outer end, fastening bolt's the inner stretches into in the vertical tubular column and the vertical lifter of roof pressure, horizontal branch fixed stay is on the circular arc extension board.

8. The fracturing slice photographing full-flow shale crack testing system according to claim 1, wherein: the shale crack imaging device comprises a rectangular frame, a left-right moving mechanism, a front-back moving mechanism, a two-dimensional moving platform, an imaging display and a camera, wherein the rectangular frame is horizontally arranged above a working table, four corners of the rectangular frame are fixedly supported on the right side part of the upper surface of the working table through second vertical support legs, the left-right moving mechanism is arranged on the front side and the rear side of the rectangular frame, the front-back moving mechanism is arranged on the left side and the right side of the rectangular frame, the two-dimensional moving platform is arranged in the rectangular frame, the left-right moving mechanism drives the two-dimensional moving platform to slide on the front-back moving mechanism along the left-right direction, the front-back moving mechanism drives the two-dimensional moving platform to slide on the left-right moving mechanism along the front-back direction, the lower surface of the two-dimensional moving platform is fixedly connected with a horizontal plate, a vertical upright post is fixedly arranged in the middle of the lower surface of the horizontal plate, and the imaging display is fixedly arranged on the vertical upright post and positioned below the horizontal plate, the camera is vertically and fixedly installed below the bottom of the imaging display, and a camera of the camera is arranged downwards.

9. The fracturing slice photographing full-flow shale crack testing system of claim 8, wherein: the left-right moving mechanism comprises a first reducing motor, two first lead screws and two first guide rods, the first reducing motor is fixedly arranged at the right side part of the front side of the rectangular frame, a power shaft of the first reducing motor and the two first lead screws are horizontally arranged along the left-right direction, the two first lead screws are arranged side by side in front and back, two ends of the first lead screw at the front side are respectively rotatably arranged at the left front part and the right front part of the inner side of the rectangular frame, two ends of the first lead screw at the back side are respectively rotatably arranged at the left back part and the right back part of the inner side of the rectangular frame, the left end part of the first lead screw at the front side and the left end part of the first lead screw at the back side as well as the right end part of the first lead screw at the front side and the right end part of the first lead screw at the back side are in transmission connection through a first belt transmission mechanism, and the right end part of the power shaft of the first reducing motor and the right end part of the first lead screw at the front side are in transmission connection through a second belt transmission mechanism, equal screw thread suit is connected with first slider on two first lead screws, and two first guide arms all set up along the fore-and-aft direction level, set up side by side about two first guide arms and fixed mounting between two first sliders, two first guide arms run through two dimension moving platform and with two dimension moving platform sliding connection.

10. The fracturing slice photographing full-flow shale crack testing system of claim 9, wherein: the back-and-forth moving mechanism comprises a second speed reducing motor, two second lead screws and two second guide rods, the second speed reducing motor is fixedly arranged on the left side part of the front side of the rectangular frame, a power shaft of the second speed reducing motor and the two second lead screws are horizontally arranged along the front-and-back direction, the two second lead screws are arranged side by side left and right, two ends of the left second lead screw are respectively rotatably arranged on the left front part and the left rear part of the inner side of the rectangular frame, two ends of the right second lead screw are respectively rotatably arranged on the right front part and the right rear part of the inner side of the rectangular frame, the front end part of the left second lead screw and the front end part of the right second lead screw as well as the rear end part of the left second lead screw and the rear end part of the right second lead screw are in transmission connection through a third belt transmission mechanism, the rear end of the power shaft of the second speed reducing motor is in coaxial transmission connection with the front end of the left second lead screw, and the two second lead screws are in threaded sleeve connection with a second sliding block, two second guide arms all set up along left right direction level, and two second guide arms set up side by side and fixed mounting between two second sliders around, two second guide arms run through two-dimensional moving platform and with two-dimensional moving platform sliding connection.

Background

The size and the propagation path of the cracks of the shale in the fracturing process are closely related to the physical characteristics of the shale, and the propagation path and the size of the cracks of the shale with different physical characteristics are inevitably insufficient in the fracturing process, so that the measurement of the cracks in the fracturing process has important value for understanding the physical characteristics of the shale in the fracturing process and subsequent guidance of engineering application. The existing crack observation device mostly adopts the method of photographing and identifying the shale, and the principle of image identification is that the gray level of a crack is different from the rock without the crack around according to the gray level of color, so that the crack can be identified, when the image is processed, a plurality of cracks can be seen by naked eyes, software cannot identify the crack, and a continuous long crack can be identified into hundreds of intermittent small cracks.

Disclosure of Invention

The invention aims to provide a full-flow shale crack testing system for fracturing slice photographing, which realizes the whole process of fracturing, slicing and crack photographing three-dimensional imaging of a shale sample and realizes three-dimensional accurate observation of shale cracks.

In order to achieve the purpose, the invention adopts the following technical scheme:

the utility model provides a full flow shale crackle test system that fracturing section was shot, includes bottom plate, table surface, shale fracturing unit, shale section device and shale crackle image device, and the bottom plate is fixed subaerial, and table surface's bottom is through the upper surface right flank portion of first stand fixed mounting at the bottom plate all around, and shale fracturing unit fixed mounting is at the upper surface left flank portion of bottom plate, and equal fixed mounting of shale section device and shale crackle image device is on table surface.

The shale fracturing device comprises two first circular support plates, a fracturing fluid tank, an air pump, a fracturing cylinder body, a gas collecting circular tank, a plurality of sets of fracturing lever assemblies and two fracturing pistons, wherein the two first circular support plates are horizontally arranged side by side from top to bottom, a plurality of vertical support rods arranged in a circumferential array are fixedly connected between the two first circular support plates, a plurality of supporting lug plates arranged in a circumferential array are integrally formed on the outer circumferences of the two first circular support plates, the bottom of each supporting lug plate on the lower side is fixedly supported on the left side part of the upper surface of the base plate through a second stand column, the bottom of the fracturing fluid tank is fixedly mounted on the top of the upper first circular support plate through a plurality of third stand columns, the air pump is fixedly mounted on the top of the fracturing fluid tank, the fracturing cylinder body is vertically arranged in the middle of the two first circular support plates in the same center, and the middle part of the outer circumference of the fracturing cylinder body is fixedly connected with a second circular support, each vertical supporting rod penetrates through the second circular supporting plate and is fixedly connected with the second circular supporting plate, the gas collecting ring box is concentrically sleeved outside the second circular supporting plate, the inner circumference of the gas collecting ring box and the outer circumference of the second circular supporting plate are fixedly connected through a plurality of horizontal long supporting plates in a circumferential array, each set of fracturing lever component circumferential array is arranged outside the fracturing cylinder body and is arranged on the two first circular supporting plates, the two fracturing pistons are respectively arranged at the upper part and the lower part in the pressure cylinder body in an up-and-down symmetrical sliding manner, each set of fracturing lever component is connected with the two fracturing pistons and drives the two fracturing pistons to synchronously and reversely slide up and down, an air inlet of the air pump is connected with an air exhaust pipe communicated with the outside atmosphere, an air outlet of the air pump is fixedly connected with an air delivery pipe, the lower end of the air delivery pipe is fixedly connected to the right side of the top of the gas collecting ring box, and a vertically, the liquid discharge pipe is provided with a liquid discharge valve, the gas collecting ring box is respectively connected with each group of fracturing lever assemblies through a gas supply pipeline, and the left side part of the upper surface of the bottom plate is fixedly connected with a flexible material receiving disc which is positioned right below the first circular ring support plate on the lower side.

The upper surface of the upper fracturing piston and the lower surface of the lower fracturing piston are fixedly connected with a plurality of force application rods arranged in a circumferential array, and the force application rods are vertically arranged;

the vertical fixed mounting that runs through in center of the fracturing piston of upside has the feed liquor pipe that is located under the fluid-discharge tube, and the lower extreme of feed liquor pipe flushes with the lower surface of the fracturing piston of upside, and the upside position of feed liquor pipe is in the top of the fracturing piston of upside, and the last side of feed liquor pipe is provided with the feed liquor valve, and the upper end of feed liquor pipe is big-end-up's horn structure.

The left set of fracturing lever assembly comprises a force application cylinder body and two sets of lever mechanisms, the force application cylinder body is vertically arranged on the left side outside the gas collection ring box, the two sets of lever mechanisms are vertically symmetrical and are arranged along the left and right direction, the inside of the force application cylinder body is divided into two chambers which are vertically symmetrical through a partition plate, force application pistons are respectively and slidably arranged in the two chambers, the top center of the force application piston on the upper side and the bottom center of the force application piston on the lower side are respectively and fixedly connected with a piston rod which is vertically arranged, the upper end of the piston rod on the upper side upwards penetrates through the top plate center of the force application cylinder body, the lower end of the piston rod on the lower side downwards penetrates through the bottom plate center of the force application cylinder body, the lever mechanism on the upper side is obliquely arranged in a left-low-right-high mode, hinged supports are respectively and fixedly arranged at the bottoms of the supporting ear plates on the upper side and the bottom of the supporting ear plates on the lower side, and the upper side of the right side of the lever mechanism on the upper side is hinged supports on the left-upper side, the left end of the upper lever mechanism is hinged with the upper end of the upper piston rod, the right end of the upper lever mechanism is hinged with the upper end of the left upper force application rod, the lower side of the right side part of the lower lever mechanism is hinged on the hinged support at the left lower side, the left end of the lower lever mechanism is hinged with the lower end of the lower piston rod, the right end of the lower lever mechanism is hinged with the lower end of the left lower force application rod, the upper cavity is connected with the gas collecting ring box through a first C-shaped pipe, the lower cavity is connected with the gas collecting ring box through a second C-shaped pipe, and the first C-shaped pipe and the second C-shaped pipe are vertically arranged;

the left end of the upper pipe of the first C-shaped pipe is fixedly arranged on the upper side part of the left side wall of the force application cylinder body and is communicated with the upper part of the upper chamber, the left end of the lower pipe of the first C-shaped pipe is fixedly arranged on the upper side of the middle part of the left side wall of the force application cylinder body and is communicated with the lower part of the upper chamber, the upper pipe and the lower pipe of the first C-shaped pipe are both provided with a first electronic ball valve, the middle part of the right pipe of the first C-shaped pipe is fixedly connected with a first L-shaped pipe, the lower end of the first L-shaped pipe is fixedly connected with the left side of the top part of the gas collection ring box, the left end of the upper pipe of the second C-shaped pipe is fixedly arranged on the lower side of the middle part of the left side wall of the force application cylinder body and is communicated with the lower part of the chamber, the left end of the lower pipe of the second C-shaped pipe is fixedly arranged on the lower side wall of the lower side of the force application cylinder body and is communicated with the lower part of the chamber, and the upper pipe and the lower pipe of the second C-shaped pipe are both provided with a second electronic ball valve, the middle part of the right side pipe of the second C-shaped pipe is fixedly connected with a second L-shaped pipe, and the upper end of the second L-shaped pipe is fixedly connected to the left side of the bottom of the gas collecting ring box.

The upper lever mechanism comprises a cuboid rod and two insertion rods, wherein the middle part of the cuboid rod is provided with insertion through holes which are through from left to right along the length direction, the two insertion rods are symmetrically arranged at the left and right sides of the cuboid rod from left to right, the right side part of the left insertion rod and the left side part of the right insertion rod are respectively provided with a runway-shaped pin hole which is through from top to bottom, the right side part of the left insertion rod is correspondingly inserted in the left end part of the insertion through hole in a sliding manner, the left side part of the right insertion rod is correspondingly inserted in the right end part of the insertion through hole in a sliding manner, the left side part and the right side part of the cuboid rod are respectively and fixedly provided with a bolt which vertically penetrates through the cuboid rod, the left bolt correspondingly penetrates through the runway-shaped pin hole at the left side, the right side bolt correspondingly penetrates through the runway-shaped pin hole at the right side, the right side part of the upper side surface of the cuboid rod is fixedly connected with a connecting lug plate which is hinged with a hinged support at the upper left side, the left end of the left insertion rod is hinged with the upper end of a piston rod at the upper side, the right end of the right insertion rod is hinged with the upper end of the force application rod on the upper left side.

The shale slicing device comprises a slicing platform, a bench clamp, a vertical support frame, a lifting support frame, two guide rods, a C-shaped support frame, linear sawteeth, a rotary speed-reducing motor, a first rotary table and a second rotary table, wherein the periphery of the bottom of the slicing platform is fixedly supported on the left side part of the upper surface of a working table through a first vertical support leg, the bench clamp is fixedly arranged on the upper surface of the slicing platform, a fixed shell is clamped on the bench clamp, the vertical support frame and the lifting support frame are fixedly arranged on the upper surface of the working table, the vertical support frame is positioned on the rear side of the slicing platform, the lifting support frame is positioned on the front side of the slicing platform, the two guide rods are horizontally arranged along the front-rear direction, the two guide rods are arranged right above the bench clamp in parallel from left to right, a door frame type support is hinged to the top of the vertical support frame, the door frame type support and a hinged shaft of the vertical support frame are horizontally arranged along the left-right direction, the rear ends of the two guide rods are fixedly arranged on the door frame type support, the front sides of the two guide rods are provided with vertical support plates, the front ends of the two guide rods are fixedly connected on the vertical support plates, the middle parts of the vertical support plates are fixedly connected with horizontal support rods which are arranged along the front-back direction and are positioned at the front sides of the vertical support plates, the front ends of the horizontal support rods are fixedly provided with limit balls, the front side parts of the horizontal support rods are supported at the top parts of the lifting support frames, the left side, the right side and the lower side of the C-shaped support frame are all open, the C-shaped support frame is arranged below the two guide rods, two slide seats which are arranged side by side in front and back are fixedly connected on an upper side cross rod of the C-shaped support frame, each slide seat is fixedly provided with two linear bearings, the two linear bearings are respectively sleeved and slid on the two guide rods correspondingly, linear sawteeth are fixedly connected between the lower ends of the two vertical rods of the C-shaped support frame, the rotary speed reduction motor is fixedly arranged at the rear side of the middle part of the upper surface of the bottom plate, the rear side of the middle part of the upper surface of the bottom plate is fixedly provided with a fourth upright post positioned between the rotary speed reduction motor and the vertical support frame, the fixed bearing frame that is provided with in top of fourth stand, rotate on the bearing frame and install the pivot that sets up along left right direction level, the pivot runs through the bearing frame, first carousel fixed mounting is at the left end of pivot, second carousel fixed mounting is at the right-hand member of pivot, the diameter of first carousel is less than the diameter of second carousel, rotary speed reducer's power shaft left end fixed mounting has the third carousel, the cover is equipped with the drive belt between first carousel and the third carousel, the right flank eccentric section of second carousel articulates there is the connecting rod that sets up along the fore-and-aft direction, the front end of connecting rod articulates at the vertical pole middle part rear side in rear side of C type support.

Lifting support frame includes vertical tubular column and vertical lifter, the fixed disc base that is provided with in bottom of vertical tubular column, disc base fixed mounting is anterior at table surface's upper surface left side, the lower lateral part of vertical lifter is pegged graft in vertical tubular column, the upper end of vertical lifter upwards stretches out the top of vertical tubular column and fixes and be provided with the front side, the equal open circular arc extension board of rear side and upside, lateral part threaded mounting has fastening bolt on the lateral wall of vertical tubular column, fastening bolt's the fixed turning handle that is provided with in outer end, fastening bolt's the inner stretches into in the vertical tubular column and the vertical lifter of roof pressure, horizontal branch fixed stay is on the circular arc extension board.

The shale crack imaging device comprises a rectangular frame, a left-right moving mechanism, a front-back moving mechanism, a two-dimensional moving platform, an imaging display and a camera, wherein the rectangular frame is horizontally arranged above a working table, four corners of the rectangular frame are fixedly supported on the right side part of the upper surface of the working table through second vertical support legs, the left-right moving mechanism is arranged on the front side and the rear side of the rectangular frame, the front-back moving mechanism is arranged on the left side and the right side of the rectangular frame, the two-dimensional moving platform is arranged in the rectangular frame, the left-right moving mechanism drives the two-dimensional moving platform to slide on the front-back moving mechanism along the left-right direction, the front-back moving mechanism drives the two-dimensional moving platform to slide on the left-right moving mechanism along the front-back direction, the lower surface of the two-dimensional moving platform is fixedly connected with a horizontal plate, a vertical upright post is fixedly arranged in the middle of the lower surface of the horizontal plate, and the imaging display is fixedly arranged on the vertical upright post and positioned below the horizontal plate, the camera is vertically and fixedly installed below the bottom of the imaging display, and a camera of the camera is arranged downwards.

The left-right moving mechanism comprises a first reducing motor, two first lead screws and two first guide rods, the first reducing motor is fixedly arranged at the right side part of the front side of the rectangular frame, a power shaft of the first reducing motor and the two first lead screws are horizontally arranged along the left-right direction, the two first lead screws are arranged side by side in front and back, two ends of the first lead screw at the front side are respectively rotatably arranged at the left front part and the right front part of the inner side of the rectangular frame, two ends of the first lead screw at the back side are respectively rotatably arranged at the left back part and the right back part of the inner side of the rectangular frame, the left end part of the first lead screw at the front side and the left end part of the first lead screw at the back side as well as the right end part of the first lead screw at the front side and the right end part of the first lead screw at the back side are in transmission connection through a first belt transmission mechanism, and the right end part of the power shaft of the first reducing motor and the right end part of the first lead screw at the front side are in transmission connection through a second belt transmission mechanism, equal screw thread suit is connected with first slider on two first lead screws, and two first guide arms all set up along the fore-and-aft direction level, set up side by side about two first guide arms and fixed mounting between two first sliders, two first guide arms run through two dimension moving platform and with two dimension moving platform sliding connection.

The back-and-forth moving mechanism comprises a second speed reducing motor, two second lead screws and two second guide rods, the second speed reducing motor is fixedly arranged on the left side part of the front side of the rectangular frame, a power shaft of the second speed reducing motor and the two second lead screws are horizontally arranged along the front-and-back direction, the two second lead screws are arranged side by side left and right, two ends of the left second lead screw are respectively rotatably arranged on the left front part and the left rear part of the inner side of the rectangular frame, two ends of the right second lead screw are respectively rotatably arranged on the right front part and the right rear part of the inner side of the rectangular frame, the front end part of the left second lead screw and the front end part of the right second lead screw as well as the rear end part of the left second lead screw and the rear end part of the right second lead screw are in transmission connection through a third belt transmission mechanism, the rear end of the power shaft of the second speed reducing motor is in coaxial transmission connection with the front end of the left second lead screw, and the two second lead screws are in threaded sleeve connection with a second sliding block, two second guide arms all set up along left right direction level, and two second guide arms set up side by side and fixed mounting between two second sliders around, two second guide arms run through two-dimensional moving platform and with two-dimensional moving platform sliding connection.

Compared with the prior art, the invention has outstanding substantive characteristics and remarkable progress, and specifically, the working principle of the invention is as follows: firstly, respectively disassembling each lever mechanism on the upper side from each hinged support on the upper side and each force application rod on the upper side, taking out a fracturing piston on the upper side from the top of a fracturing cylinder body, then placing a prepared shale sample in a cylindrical structure in the fracturing cylinder body, wherein the outer diameter of the shale sample is the same as the inner diameter of the fracturing cylinder body, the bottom of the shale sample is supported on the top of the fracturing piston on the lower side, then installing the fracturing piston on the upper side on the inner upper side of the fracturing cylinder body, respectively assembling and connecting each lever mechanism on the upper side with each hinged support on the upper side and each force application rod on the upper side, contacting the fracturing piston on the lower side with the shale sample, forming a certain gap between the fracturing piston on the upper side and the shale sample, then opening a liquid discharge valve and a liquid inlet valve to enable fracturing liquid in a fracturing liquid tank to be filled in a central cavity of the shale sample through a liquid discharge pipe and a liquid inlet pipe, then closing the liquid discharge valve and the liquid inlet valve, starting the air pump, pumping high-pressure air into the gas collecting ring box by the air pump through the air exhaust pipe and the air delivery pipe, closing each first electronic ball valve at the upper side and each second electronic ball valve at the lower side, opening each first electronic ball valve at the lower side and each second electronic ball valve at the upper side, enabling the high-pressure air to enter the lower part of each chamber at the upper side through the lower side pipe of each first C-shaped pipe, enabling the force application piston at the upper side to move upwards, enabling the high-pressure air to enter the upper part of each chamber at the lower side through the upper side pipe of each second C-shaped pipe, enabling the force application piston at the lower side to move downwards, so that the upper ends of the piston rods at the upper side respectively correspondingly push the outer end parts of the cuboid rods at the upper side to move upwards, and the lower ends of the piston rods at the lower side respectively correspondingly push the outer end parts of the cuboid rods at the lower side to move downwards, the inner end parts of the cuboid rods on the upper side push the fracturing piston on the upper side to move downwards through the force application rods on the upper side, the inner end parts of the cuboid rods on the lower side push the fracturing piston on the lower side to move upwards through the force application rods on the lower side, so that the shale sample is pressurized and fractured, after fracturing is completed, reverse operation is carried out, each first electronic ball valve on the upper side and each second electronic ball valve on the lower side are opened, each first electronic ball valve on the lower side and each second electronic ball valve on the upper side are closed, high-pressure air enters the upper part of each chamber on the upper side through the upper side pipe of each first C-shaped pipe, the force application piston on the upper side moves downwards, the high-pressure air enters the lower part of each chamber on the lower side through the lower side pipe of each second C-shaped pipe, the force application piston moves upwards, and thus, the upper ends of the piston rods on the upper side respectively correspondingly pull the outer end parts of the cuboid rods on the upper side to move downwards, the lower ends of the piston rods on the lower side respectively correspondingly pull the outer end parts of the cuboid rods on the lower side to move upwards, the inner end parts of the cuboid rods on the upper side pull the fracturing pistons on the upper side to move upwards through the force application rods on the upper side, the inner end parts of the cuboid rods on the lower side pull the fracturing pistons on the lower side to move downwards through the force application rods on the lower side, at the moment, the lever mechanisms on the lower side are respectively detached from the hinged supports on the lower side and the force application rods on the lower side, the fracturing pistons on the lower side are taken out from the bottom of the fracturing cylinder body, shale samples are separated from the bottom of the fracturing cylinder body and fall on a flexible material receiving disc, the shale samples are air-dried on the flexible material receiving disc, the dried shale samples are loaded into a fixed shell, the fixed shell plays a role in protecting the shale samples, a rotary speed reducing motor is started, and a power shaft of the rotary speed reducing motor drives, the third rotary table drives the first rotary table to rotate through a transmission belt, the first rotary table drives the second rotary table to rotate, the second rotary table drives the C-shaped support to reciprocate back and forth along the two guide rods through a connecting rod, the C-shaped support drives the linear saw teeth to reciprocate back and forth, the linear saw teeth are obliquely cut to move downwards through adjusting the height of the vertical lifting rod, the slicing of the shale sample is realized, the thickness of the slice is adjusted by controlling the feeding of the shale sample during each slicing, after the thinner shale slice is obtained, the shale slice is placed on a working table surface right below the two-dimensional moving platform, the imaging display and the camera are opened, the camera takes pictures and records the shale slice, the first speed reduction motor and the second speed reduction motor are started, the two-dimensional moving platform is driven to move two-dimensionally on the water plane in the rectangular frame, and the two-dimensional moving platform drives the imaging display and the camera, and acquiring the crack trend of the shale slices, recording the images of the shale slices by an imaging display, subsequently photographing and recording all the shale slices, stacking and accumulating the images of all the shale slices in a three-dimensional space, and realizing three-dimensional imaging of the cracks after the shale sample is fractured.

The invention realizes the whole process of fracturing, slicing and crack photographing three-dimensional imaging of the shale sample and realizes three-dimensional accurate observation of the shale cracks.

Drawings

Fig. 1 is an isometric view of the present invention.

Fig. 2 is a schematic structural diagram of the shale fracturing device of the present invention.

Fig. 3 is a cross-sectional view of a shale fracturing apparatus of the present invention.

Fig. 4 is a schematic structural diagram of parts of the shale fracturing device of the invention.

Fig. 5 is an isometric view one of the shale slicing apparatus of the present invention.

Fig. 6 is a left side view of the shale slicing apparatus of the present invention.

Fig. 7 is an isometric view two of the shale slicing apparatus of the present invention.

Fig. 8 is an isometric view one of the shale crack imaging apparatus of the present invention.

Fig. 9 is an isometric view two of the shale crack imaging apparatus of the present invention.

Fig. 10 is a partially enlarged view of a portion a in fig. 1.

Fig. 11 is a partial enlarged view of fig. 3 at B.

Detailed Description

The embodiments of the present invention are further described below with reference to the drawings.

As shown in fig. 1-11, a fracturing slice photographing full-flow shale crack testing system comprises a bottom plate 1, a workbench surface 2, a shale fracturing device, a shale slicing device and a shale crack imaging device, wherein the bottom plate 1 is fixed on the ground, the periphery of the bottom of the workbench surface 2 is fixedly installed on the right side part of the upper surface of the bottom plate 1 through a first stand column 3, the shale fracturing device is fixedly installed on the left side part of the upper surface of the bottom plate 1, and the shale slicing device and the shale crack imaging device are fixedly installed on the workbench surface 2.

The shale fracturing device comprises two first circular support plates 4, a fracturing fluid box 5, an air pump 6, a fracturing cylinder 7, a gas collecting circular box 8, a plurality of sets of fracturing lever assemblies and two fracturing pistons 9, wherein the two first circular support plates 4 are horizontally arranged side by side from top to bottom, a plurality of vertical support rods 10 arranged in a circumferential array are fixedly connected between the two first circular support plates 4, a plurality of supporting lug plates 11 arranged in a circumferential array are integrally formed on the outer circumferences of the two first circular support plates 4, the bottom of each supporting lug plate 11 on the lower side is fixedly supported on the left side part of the upper surface of the bottom plate 1 through second stand columns 12, the bottom of the fracturing fluid box 5 is fixedly mounted on the top of the first circular support plate 4 on the upper side through a plurality of third stand columns 13, the air pump 6 is fixedly mounted on the top of the fracturing fluid box 5, the fracturing cylinder 7 is vertically arranged between the two first circular support plates 4 in the same center, a second circular support plate 14 is fixedly connected to the middle part of the outer circumference of the fracturing cylinder 7 in an integrated forming manner, each vertical support rod 10 penetrates through the second circular support plate 14 and is fixedly connected with the second circular support plate 14, the gas collecting ring box 8 is concentrically sleeved outside the second circular support plate 14, the inner circumference of the gas collecting ring box 8 and the outer circumference of the second circular support plate 14 are fixedly connected through a plurality of horizontal strip support plates 15 in a circumferential array, each set of fracturing lever component circumferential array is arranged outside the fracturing cylinder 7 and is arranged on two first circular support plates 4, two fracturing pistons 9 are respectively arranged at the upper part and the lower part in the pressure cylinder in an up-and-down symmetrical manner, each set of fracturing lever component is connected with two fracturing pistons 9 and drives the two fracturing pistons 9 to synchronously and reversely slide up and down, an air suction pipe 16 communicated with the outside atmosphere is connected to an air inlet of the air pump 6, and an air delivery pipe 17 is fixedly connected to an air outlet of the air pump 6, the lower extreme fixed connection of gas-supply pipe 17 is on the top right side of gas collection ring case 8, and the bottom center fixedly connected with of fracturing fluid tank 5 is the fluid-discharge tube 18 of vertical setting, is provided with flowing back valve 19 on the fluid-discharge tube 18, and gas collection ring case 8 is connected with each group's fracturing lever subassembly through the air supply line respectively, and the upper surface left side portion fixedly connected with of bottom plate 1 is located the flexible material disc 20 that connects under the first ring extension board 4 of downside.

The upper surface of the upper side of the fracturing piston 9 and the lower surface of the lower side of the fracturing piston 9 are fixedly connected with a plurality of force applying rods 21 which are arranged in a circumferential array, and the force applying rods 21 are vertically arranged;

the vertical fixed mounting that runs through in centre of the fracturing piston 9 of upside has a feed liquor pipe 22 that is located under fluid-discharge tube 18, and the lower extreme of feed liquor pipe 22 flushes with the lower surface of the fracturing piston 9 of upside, and the upside position of feed liquor pipe 22 is in the top of the fracturing piston 9 of upside, and the last side of feed liquor pipe 22 is provided with feed liquor valve 23, and the horn structure of big-end-up is presented to the upper end of feed liquor pipe 22.

The left set of fracturing lever assembly comprises a force application cylinder body 24 and two sets of lever mechanisms, the force application cylinder body 24 is vertically arranged on the left side of the outer part of the gas collecting ring box 8, the two sets of lever mechanisms are vertically symmetrical and are arranged along the left and right direction, the inside of the force application cylinder body 24 is divided into two chambers 26 which are vertically symmetrical through a partition plate 25, force application pistons 27 are respectively installed in the two chambers 26 in a sliding mode, the top center of the force application piston 27 on the upper side and the bottom center of the force application piston 27 on the lower side are respectively and fixedly connected with a piston rod 28 which is vertically arranged, the upper end of the piston rod 28 on the upper side upwards penetrates through the top plate center of the force application cylinder body 24, the lower end of the piston rod 28 on the lower side downwards penetrates through the center of a bottom plate 1 of the force application cylinder body 24, the lever mechanisms on the upper side are obliquely arranged in a low left and high mode, hinged supports 29 are respectively and fixedly installed at the bottoms of the support lugs 11 on the upper side and the support lugs 11 on the lower side, the upper side of the right side part of the upper lever mechanism is hinged on a hinged support 29 on the upper left side, the left end of the upper lever mechanism is hinged with the upper end of a piston rod 28 on the upper side, the right end of the upper lever mechanism is hinged with the upper end of a force application rod 21 on the upper left side, the lower side of the right side part of the lower lever mechanism is hinged on the hinged support 29 on the lower left side, the left end of the lower lever mechanism is hinged with the lower end of the piston rod 28 on the lower side, the right end of the lower lever mechanism is hinged with the lower end of the force application rod 21 on the lower left side, a cavity 26 on the upper side is connected with a gas collecting ring box 8 through a first C-shaped pipe 30, a cavity 26 on the lower side is connected with the gas collecting ring box 8 through a second C-;

the left end of the upper pipe of the first C-shaped pipe 30 is fixedly arranged at the upper side part of the left side wall of the force application cylinder body 24 and communicated with the upper part of the upper side chamber 26, the left end of the lower pipe of the first C-shaped pipe 30 is fixedly arranged at the upper side of the middle part of the left side wall of the force application cylinder body 24 and communicated with the lower part of the upper side chamber 26, the upper pipe and the lower pipe of the first C-shaped pipe 30 are both provided with a first electronic ball valve 32, the middle part of the right pipe of the first C-shaped pipe 30 is fixedly connected with a first L-shaped pipe 33, the lower end of the first L-shaped pipe 33 is fixedly connected at the left top part of the gas collecting ring box 8, the left end of the upper pipe of the second C-shaped pipe 31 is fixedly arranged at the lower side part of the middle part of the left side wall of the force application cylinder body 24 and communicated with the upper part of the lower side chamber 26, the left end of the lower side pipe of the second C-shaped pipe 31 is fixedly arranged at the lower side wall of the force application cylinder body 24 and communicated with the lower side chamber 26, the upper pipe and the second C-shaped pipe 31 are both provided with a second electronic ball valve 34, the middle part of the right side pipe of the second C-shaped pipe 31 is fixedly connected with a second L-shaped pipe 35, and the upper end of the second L-shaped pipe 35 is fixedly connected to the left side of the bottom of the gas collecting ring box 8.

The upper lever mechanism comprises a cuboid rod 36 and two plug-in rods 37, the middle part of the cuboid rod 36 is provided with a plug-in through hole 38 which is through from left to right along the length direction, the two plug-in rods 37 are symmetrically arranged at the left and right sides of the cuboid rod 36 from left to right, the right side part of the left plug-in rod 37 and the left side part of the right plug-in rod 37 are both provided with a runway-shaped pin hole 39 which is through from top to bottom, the right side part of the left plug-in rod 37 is correspondingly and slidably plugged in the left end part in the plug-in through hole 38, the left side part of the right plug-in rod 37 is correspondingly and slidably plugged in the right end part in the plug-in through hole 38, the left side part and the right side part of the cuboid rod 36 are both fixedly provided with a plug pin 40 which vertically penetrates through the cuboid rod 36, the left plug pin 40 correspondingly penetrates through the runway-shaped pin hole 39 on the left side, the right side plug pin 40 correspondingly penetrates through the runway-shaped pin hole 39 on the right side, the right side part of the upper side surface of the cuboid rod 36 is fixedly connected with a connecting lug plate hinged with the left upper hinged support 29, the left end of the left insertion rod 37 is hinged to the upper end of the upper piston rod 28, and the right end of the right insertion rod 37 is hinged to the upper end of the left upper force application rod 21.

The shale slicing device comprises a slicing platform 41, a bench clamp 42, a vertical support frame 43, a lifting support frame, two guide rods 44, a C-shaped support frame 45, linear sawteeth 46, a rotary speed reducing motor 47, a first rotary disc 48 and a second rotary disc 49, wherein the periphery of the bottom of the slicing platform 41 is fixedly supported on the left side part of the upper surface of the working table top 2 through a first vertical support leg 50, the bench clamp 42 is fixedly arranged on the upper surface of the slicing platform 41, a fixed shell 51 is clamped on the bench clamp 42, the vertical support frame 43 and the lifting support frame are both fixedly arranged on the upper surface of the working table top 2, the vertical support frame 43 is positioned on the rear side of the slicing platform 41, the lifting support frame is positioned on the front side of the slicing platform 41, the two guide rods 44 are both horizontally arranged along the front-back direction, the two guide rods 44 are arranged above the bench clamp 42 in parallel from left to right, a door frame type support 52 is hinged on the top of the vertical, the rear ends of the two guide rods 44 are fixedly arranged on the doorframe-type support 52, the front sides of the two guide rods 44 are provided with vertical support plates 53, the front ends of the two guide rods 44 are fixedly connected on the vertical support plates 53, the middle parts of the vertical support plates 53 are fixedly connected with horizontal support rods 54 which are arranged along the front-back direction and are positioned at the front sides of the vertical support plates 53, the front ends of the horizontal support rods 54 are fixedly provided with limit balls 55, the front side parts of the horizontal support rods 54 are supported at the top of the lifting support frame, the left side, the right side and the lower side of the C-shaped support 45 are all opened, the C-shaped support 45 is arranged below the two guide rods 44, two slide bases 56 which are arranged side by side from front to back are fixedly connected on the transverse rod at the upper side of the C-shaped support 45, two linear bearings 57 are fixedly arranged on each slide base 56, the two linear bearings 57 are respectively sleeved and slid on the two guide rods 44 correspondingly, and the linear saw teeth 46 are fixedly connected between the lower ends of the two vertical rods of the C-shaped support 45, rotating speed reduction motor 47 fixed mounting is in the upper surface middle part rear side of bottom plate 1, the fixed fourth stand 58 that is located between rotating speed reduction motor 47 and the vertical support frame 43 that is provided with of upper surface middle part rear side of bottom plate 1, the fixed bearing frame 59 that is provided with in top of fourth stand 58, rotate the pivot 60 of installing along left right direction level setting on the bearing frame 59, pivot 60 runs through bearing frame 59, first carousel 48 fixed mounting is in the left end of pivot 60, second carousel 49 fixed mounting is at the right-hand member of pivot 60, the diameter of first carousel 48 is less than the diameter of second carousel 49, rotating speed reduction motor 47's power shaft left end fixed mounting has third carousel 61, the cover is equipped with drive belt 62 between first carousel 48 and the third carousel 61, the right side eccentric portion of second carousel 49 articulates there is the connecting rod 63 along the fore-and-aft direction setting, the front end of connecting rod 63 articulates at the vertical pole middle part rear side of C type support 45.

Lift supports includes vertical tubular column 64 and vertical lifter 65, the fixed disc base 66 that is provided with in bottom of vertical tubular column 64, disc base 66 fixed mounting is anterior left at table surface 2's upper surface, the lower lateral part of vertical lifter 65 is pegged graft in vertical tubular column 64, the top of vertical tubular column 64 is upwards stretched out and the fixed front side that is provided with to the upper end of vertical lifter 65, rear side and the equal open circular arc extension board 67 of upside, fastening bolt is installed to the lateral wall upper portion screw thread of vertical tubular column 64, fastening bolt's the fixed turning handle 68 that is provided with in outer end, fastening bolt's the inner stretches into in vertical tubular column 64 and the vertical lifter 65 of roof pressure, horizontal strut 54 fixed stay is on circular arc extension board 67.

The shale crack imaging device comprises a rectangular frame 69, a left-right moving mechanism, a front-back moving mechanism, a two-dimensional moving platform 70, an imaging display 71 and a camera 72, wherein the rectangular frame 69 is horizontally arranged above the working table surface 2, four corners of the rectangular frame 69 are fixedly supported on the right side part of the upper surface of the working table surface 2 through second vertical support legs 73, the left-right moving mechanism is arranged on the front side and the rear side of the rectangular frame 69, the front-back moving mechanism is arranged on the left side and the right side of the rectangular frame 69, the two-dimensional moving platform 70 is arranged in the rectangular frame 69, the left-right moving mechanism drives the two-dimensional moving platform 70 to slide on the front-back moving mechanism along the left-right direction, the front-back moving mechanism drives the two-dimensional moving platform 70 to slide on the left-right moving mechanism along the front-back direction, a horizontal plate 74 is fixedly connected to the lower surface of the two-dimensional moving platform 70, and a vertical upright 75 is fixedly arranged in the middle of the lower surface of the horizontal plate 74, the imaging display 71 is fixedly mounted on the vertical upright 75 and located below the horizontal plate 74, the camera 72 is vertically and fixedly mounted below the bottom of the imaging display 71, and the camera of the camera 72 is arranged downward.

The left-right moving mechanism comprises a first speed reducing motor 76, two first lead screws 77 and two first guide rods 78, the first speed reducing motor 76 is fixedly installed at the front right side part of the rectangular frame 69, a power shaft of the first speed reducing motor 76 and the two first lead screws are horizontally arranged along the left-right direction, the two first lead screws are arranged side by side in front and back, two ends of the first lead screw at the front side are respectively rotatably installed at the left front part and the right front part of the inner side of the rectangular frame 69, two ends of the first lead screw at the back side are respectively rotatably installed at the left back part and the right back part of the inner side of the rectangular frame 69, the left end part of the first lead screw at the front side and the left end part of the first lead screw 77 at the back side as well as the right end part of the first lead screw at the front side and the right end part of the first lead screw 77 at the back side are in transmission connection through a first belt transmission mechanism 79, the right end part of the power shaft of the first speed reducing motor 76 and the right end part of the first lead screw at the front side are in transmission connection through a second belt transmission mechanism 80, two first lead screws 77 are all connected with first sliding blocks 81 in a threaded sleeved mode, two first guide rods 78 are all horizontally arranged in the front-back direction, the two first guide rods 78 are arranged side by side left and right and are fixedly installed between the two first sliding blocks 81, and the two first guide rods 78 penetrate through the two-dimensional moving platform 70 and are in sliding connection with the two-dimensional moving platform 70.

The back-and-forth moving mechanism comprises a second speed reducing motor 82, two second lead screws 83 and two second guide rods 84, the second speed reducing motor 82 is fixedly installed on the left side part of the front side of the rectangular frame 69, a power shaft of the second speed reducing motor 82 and the two second lead screws are horizontally arranged along the front-and-back direction, the two second lead screws 83 are arranged side by side in the left-and-right direction, two ends of the left second lead screw 83 are respectively rotatably installed on the left front part and the left rear part of the inner side of the rectangular frame 69, two ends of the right second lead screw 83 are respectively rotatably installed on the right front part and the right rear part of the inner side of the rectangular frame 69, a front end part of the left second lead screw and a front end part of the right second lead screw 83, a rear end part of the left second lead screw and a rear end part of the right second lead screw 83 are respectively in transmission connection through a third belt transmission mechanism 85, a rear end of the power, the two second lead screws 83 are connected with second sliders 86 in a threaded sleeved mode, the two second guide rods 84 are horizontally arranged in the left-right direction, the two second guide rods 84 are arranged in a front-back side-by-side mode and are fixedly installed between the two second sliders 86, and the two second guide rods 84 penetrate through the two-dimensional moving platform 70 and are connected with the two-dimensional moving platform 70 in a sliding mode.

The working principle of the invention is as follows: firstly, respectively detaching each lever mechanism on the upper side from each hinged support 29 on the upper side and each force application rod 21 on the upper side, taking out the fracturing piston 9 on the upper side from the top of the fracturing cylinder 7, then placing the prepared shale sample 87 in the fracturing cylinder 7 in a cylindrical structure, wherein the outer diameter of the shale sample 87 is the same as the inner diameter of the fracturing cylinder 7, the bottom of the shale sample 87 is supported on the top of the fracturing piston 9 on the lower side, then installing the fracturing piston 9 on the upper side on the inner upper side of the fracturing cylinder 7, respectively assembling and connecting each lever mechanism on the upper side with each hinged support 29 on the upper side and each force application rod 21 on the upper side, contacting the fracturing piston 9 on the lower side with the shale sample 87, forming a certain gap between the fracturing piston 9 on the upper side and the shale sample 87, then opening the liquid discharge valve 19 and the liquid inlet valve 23 to fill the central cavity of the shale sample 87 with the fracturing liquid in the fracturing liquid tank 5 through the liquid discharge pipe 18 and the liquid inlet pipe 22, then the liquid discharge valve 19 and the liquid inlet valve 23 are closed, then the air pump 6 is started, the air pump 6 pumps the high-pressure air pump 6 into the gas collecting ring box 8 through the air exhaust pipe 16 and the air delivery pipe 17, at this time, each first electronic ball valve 32 on the upper side and each second electronic ball valve 34 on the lower side are closed, each first electronic ball valve 32 on the lower side and each second electronic ball valve 34 on the upper side are opened, the high-pressure air enters the lower part of each chamber 26 on the upper side through the lower side pipe of each first C-shaped pipe 30, the force application piston 27 on the upper side is moved upwards, the high-pressure air enters the upper part of each chamber 26 on the lower side through the upper side pipe of each second C-shaped pipe 31, the force application piston 27 on the lower side is moved downwards, in this way, the upper ends of each piston rod 28 on the upper side respectively correspondingly push the outer end parts of each cuboid rod 36 on the upper side to move upwards, the lower ends of each piston rod 28 on the lower side respectively correspondingly push the outer end parts of each cuboid rod 36 to move downwards, the inner end of each upper rectangular parallelepiped rod 36 pushes the upper fracturing piston 9 to move downwards through each upper force application rod 21, the inner end of each lower rectangular parallelepiped rod 36 pushes the lower fracturing piston 9 to move upwards through each lower force application rod 21, and thus the shale sample 87 is fractured under pressure, after fracturing is completed, the operation is reversed, each first electronic ball valve 32 on the upper side and each second electronic ball valve 34 on the lower side are opened, each first electronic ball valve 32 on the lower side and each second electronic ball valve 34 on the upper side are closed, high-pressure air enters the upper part of each upper chamber 26 through the upper pipe of each first C-shaped pipe 30, the upper force application piston 27 moves downwards, high-pressure air enters the lower part of each lower chamber 26 through the lower pipe of each second C-shaped pipe 31, and the lower force application piston 27 moves upwards, in this way, the upper ends of the respective upper piston rods 28 respectively pull the outer ends of the respective upper rectangular parallelepiped rods 36 downward, the lower ends of the respective lower piston rods 28 respectively pull the outer ends of the respective lower rectangular parallelepiped rods 36 upward, the inner ends of the respective upper rectangular parallelepiped rods 36 pull the upper fracturing piston 9 upward through the respective upper force application rods 21, the inner ends of the respective lower rectangular parallelepiped rods 36 pull the lower fracturing piston 9 downward through the respective lower force application rods 21, at this time, the respective lower lever mechanisms are detached from the respective lower hinged supports 29 and the respective lower force application rods 21, the lower fracturing piston 9 is taken out from the bottom of the fracturing cylinder 7, the shale samples 87 fall onto the flexible material receiving disc 20 from the bottom of the fracturing cylinder 7, and the shale samples 87 are air-dried on the flexible material receiving disc 20, then the dried shale sample 87 is loaded into a fixed shell 51, the fixed shell 51 plays a role in protecting the shale sample 87, a rotary speed reducing motor 47 is started, a power shaft of the rotary speed reducing motor 47 drives a third turntable 61 to rotate, the third turntable 61 drives a first turntable 48 to rotate through a transmission belt 62, the first turntable 48 drives a second turntable 49 to rotate, the second turntable 49 drives a C-shaped bracket 45 to reciprocate back and forth along two guide rods 44 through a connecting rod 63, the C-shaped bracket 45 drives a linear saw tooth 46 to reciprocate back and forth, the linear saw tooth 46 is driven to move obliquely downwards by adjusting the height of a vertical lifting rod 65 to slice the shale sample 87, the thickness of the slice is adjusted by controlling the feeding of the shale sample 87 during each slicing, after a thinner shale slice is obtained, the shale slice is placed on a working table top 2 right below a two-dimensional moving platform 70, opening the imaging display 71 and the camera 72, recording the picture of the shale slices by the camera 72, starting the first speed reduction 76 and the second speed reduction motor 82, driving the two-dimensional moving platform 70 to move two-dimensionally on the horizontal plane in the rectangular frame 69, driving the imaging display 71 and the camera 72 to move two-dimensionally on the horizontal plane by the two-dimensional moving platform 70 to obtain the crack trend of the shale slices, recording the image of the shale slices by the imaging display 71, subsequently recording the picture of all the shale slices, stacking and accumulating the images of all the shale slices in a three-dimensional space, and realizing the three-dimensional imaging of the cracks after the fracturing of the shale sample 87.

The above embodiments are merely to illustrate rather than to limit the technical solutions of the present invention, and although the present invention has been described in detail with reference to the above embodiments, those of ordinary skill in the art should understand that; modifications and equivalents may be made thereto without departing from the spirit and scope of the invention and it is intended to cover in the claims the invention as defined in the appended claims.