1. An automatic soil sampler, includes shallow (1), its characterized in that: the cart (1) is provided with a soil breaking device (2) for removing a surface soil layer, a soil taking device (3) for taking out a soil sample and a driving device (4) for driving the soil breaking device (2) and the soil taking device (3) to move downwards;

the trolley (1) comprises a bottom plate (11), a hand-push handle (12) arranged on one side of the bottom plate (11), rollers (13) arranged on the lower side of the bottom plate (11), and a rotating disc (14) rotatably connected to the upper side of the bottom plate (11), wherein a rotating shaft (15) is rotatably connected to the middle of the rotating disc (14), the rotating shaft (15) is fixedly connected with the bottom plate (11), two fixing frames (16) are arranged outside the upper side of the rotating disc (14) at intervals, the fixing frames (16) are vertically and slidably connected with sliding frames (17), and one sides of the sliding frames (17) facing the axial lead of the rotating shaft (15) are connected with inserting blocks (18);

the soil breaking device (2) and the soil taking device (3) are respectively arranged on the two sliding frames (17);

drive arrangement (4) set up in bottom plate (11) upside, rolling disc (14) are provided with arc hole (141) that supply drive arrangement (4) to pass, drive arrangement (4) include actuating cylinder (41), drive block (42) be connected with actuating cylinder (41), drive block (42) one side is provided with slot (421) that supply inserted block (18) card to go into.

2. An automatic soil sampler as claimed in claim 1 wherein: the ground breaking device (2) comprises a driving motor (21) connected with the sliding frame (17) and a ground breaking drill bit (22) connected with the driving motor (21).

3. An automatic soil sampler as claimed in claim 1 wherein: the soil sampling device (3) comprises a lifting rod (31) which is connected with the sliding frame (17) and is vertically arranged, and a soil sampler (32) which is connected with the lower end of the lifting rod (31) in a threaded manner.

4. An automatic soil sampler as claimed in claim 1 wherein: the fixed frame (16) comprises two side strips (161) which are vertically arranged and connected with the rotating disc (14), a top strip (162) connected between the upper ends of the two side strips (161), and a blocking piece (163) positioned on the lower side of the top strip (162);

hinder piece (163) including connecting strip (1631) be connected with side strip (161), connect in connecting strip (1631) downside and block motor (1632), the output shaft that blocks motor (1632) sets up and is connected with and blocks strip (1633), connecting strip (1631) are provided with card hole (1634) that the output shaft card that supplies to block motor (1632) is gone into, supply to block strip (1633) and place and pivoted activity chamber (1635), block that strip (1633) can rotate to carriage (17) department and prevent carriage (17) landing.

5. An automatic soil sampler as claimed in claim 4 wherein: the two blocking parts (163) are respectively positioned at the upper end and the lower end of the fixing frame (16);

the sliding frame (17) comprises a sliding sleeve (171) sleeved between the outer sides of two side bars (161), one side of the sliding sleeve (171) is connected with an installation platform (172), the other side of the sliding sleeve is connected with an insertion block (18), at least one connecting rod (173) is connected with the installation platform (172) towards the upper side of one end of the sliding sleeve (171), a through hole (1711) for the connecting rod (173) to pass through is arranged in the sliding sleeve (171) in a penetrating manner, one side of the sliding sleeve (171) is connected with a fixed motor (174), the end part of an output shaft of the fixed motor (174) is connected with a driving screw rod (175), the driving screw rod (175) is in threaded connection with a fixed bar (176), the sliding sleeve (171) is provided with a connecting hole (1712) for the output shaft of the fixed motor (174) and the driving screw rod (175) to be clamped in and a fixed hole (1713) for the fixed bar (176) to be placed and slide, and the fixed hole (1713) is communicated with the through hole (1711), the upper end and the lower end of the connecting rod (173) are provided with fixing grooves (1731) for the fixing strips (176) to be clamped in.

6. An automatic soil sampler as claimed in claim 5 wherein: the upper end of the connecting rod (173) is connected with a limiting disc (1732).

7. An automatic soil sampler as claimed in claim 1 wherein: the cart is characterized in that a positioning device (5) is arranged at the bottom of the cart (1), the positioning device (5) comprises a threaded rod (51) in threaded connection with the bottom plate (11), a positioning rod (52) is connected to the lower end of the threaded rod (51), and positioning blades (53) are connected to the outer side of the positioning rod (52).

8. An automatic soil sampler as claimed in claim 7, wherein: the rotating shaft (15) is arranged in a hollow mode and is used for a threaded rod (51) to penetrate through, and a rotating handle (54) is connected to the upper end of the threaded rod (51).

9. An automatic soil sampler as claimed in claim 8 wherein: the threaded rod (51) is staggered with the axis of the rotating shaft (15), a fixing rod (55) penetrates through the end of the rotating handle (54) movably, the fixing rod (55) is arranged vertically, a clamping block (56) is connected to the upper side of the rotating disc (14), and a clamping groove (551) for the clamping block (56) to be clamped is formed in the fixing rod (55).

10. An automatic soil sampler as claimed in claim 9, wherein: the lower end of the fixing rod (55) is fixedly sleeved with a fixing ring (57).

Background

In engineering geological exploration and reconnaissance work, in order to obtain the physical and mechanical property index of foundation soil, a soil sampler is required to be used for sampling undisturbed soil with a certain depth.

Chinese patent publication No. CN202994518U discloses a cutting ring geotome, which comprises a cutting ring housing composed of two half-pipes with protrusions at both ends and having a cutting ring inside; one end of the cutting ring shell is connected with the hollow cylindrical tool bit, and the other end of the cutting ring shell is connected with the base provided with the exhaust hole; the bottom of the base is connected with the handle; one end of the cutter head is a slope angle end with slope angles on the inner wall and the outer wall, and the slope angle end is symmetrically provided with a plurality of openings.

The cutting ring soil sampler is the most common soil sampler at present, the cutting ring of the soil sampler is drilled into the soil to a required depth and then is pulled out, then the cutting ring and the semi-cylinder are detached, the scraper is used for leveling the redundant soil at the two ends, and the soil in the cutting ring can be used as a test sample. When the soil sampler is used, the whole process needs to be carried out manually, and time and labor are wasted.

Disclosure of Invention

For more laborsaving gain soil sample, this application provides an automatic soil sampler.

The application provides an automatic soil sampler adopts following technical scheme:

an automatic soil sampler comprises a cart, wherein the cart is provided with a soil breaking device for removing a surface soil layer, a soil taking device for taking out a soil sample and a driving device for driving the soil breaking device and the soil taking device to move downwards;

the trolley comprises a bottom plate, a hand push handle arranged on one side of the bottom plate, rolling wheels arranged on the lower side of the bottom plate and a rotating disc rotatably connected to the upper side of the bottom plate, wherein a rotating shaft is rotatably connected to the middle of the rotating disc, the rotating shaft is fixedly connected with the bottom plate, two fixing frames are arranged outside the upper side of the rotating disc at intervals, the fixing frames are vertically and slidably connected with sliding frames, and one side of each sliding frame, which faces the axial lead of the rotating shaft, is connected with an insert block;

the soil breaking device and the soil sampling device are respectively arranged on the two sliding frames;

the driving device is arranged on the upper side of the bottom plate, the rotating disc is provided with an arc-shaped hole for the driving device to pass through, the driving device comprises a driving oil cylinder and a driving block connected with the driving oil cylinder, and a slot for the insertion block to be clamped into is formed in one side of the driving block.

By adopting the technical scheme, when soil needs to be taken, the cart is pushed to a sampling place; then the sliding frame and the fixed frame which are provided with the ground breaking device rotate towards the driving device until the inserting block is clamped into the inserting groove; then starting the driving oil cylinder, driving a piston rod of the oil cylinder to contract, driving the soil breaking device to move downwards, and punching the soil layer to a required depth by the soil breaking device; then the driving oil cylinder drives the soil breaking device to reset, and the rotating disc is rotated to enable the other inserting block to be clamped into the inserting slot, so that the soil taking device is linked with the driving oil cylinder; and finally, driving the oil cylinder to drive the soil sampling device to move downwards, inserting the soil sampler into soil, resetting the driving oil cylinder, and taking out the soil sampler with the soil sample to finish sampling.

Firstly, the whole soil taking process is basically automatically carried out, manual punching and soil taking are not needed, and time and labor are saved; and one driving oil cylinder can drive the soil taking device and the soil breaking device to move up and down, so that the number of driving mechanisms is reduced, and the cost, the weight and the occupied space are reduced.

Optionally, the ground breaking device comprises a driving motor connected with the sliding frame and a ground breaking drill bit connected with the driving motor.

Through adopting above-mentioned technical scheme, when the device that breaks ground rotated to operating position, start driving motor and actuating cylinder, in the drill bit that breaks ground was rotatory and bored into the soil, the partial downthehole soil was discharged along drill bit helical blade, and when the device that breaks ground moved up, the drill bit that breaks ground took out the downthehole surplus soil, accomplished and punches.

Optionally, the soil sampling device comprises a lifting rod connected with the sliding frame and vertically arranged, and a soil sampler in threaded connection with the lower end of the lifting rod.

By adopting the technical scheme, the soil sampler can be unscrewed after soil sampling is completed, a new soil sampler is replaced, next soil sampling can be immediately carried out, the soil sampler is disassembled simultaneously, and the efficiency is improved when a soil sample is obtained.

Optionally, the fixed frame includes two side strips vertically arranged and connected to the rotating disc, a top strip connected between the upper ends of the two side strips, and a blocking member located on the lower side of the top strip;

stop the connecting strip that includes to be connected with the side strip, connect in the connecting strip downside and block the motor, the output shaft that blocks the motor sets up and is connected with and blocks the strip, the connecting strip is provided with the card hole that the output shaft card that supplies to block the motor goes into, supplies to block the strip and place and the pivoted movable chamber, it is rotatable to carriage department and prevents the carriage landing to block the strip.

Through adopting above-mentioned technical scheme, block that can block the carriage landing, when broken soil device or the device of fetching earth need move down the work, start and block the motor, it can to drive to block that the strip rotates to relative carriage dislocation.

Optionally, two blocking parts are arranged and are respectively positioned at the upper end and the lower end of the fixing frame;

the carriage is including the sliding sleeve of cover between two sidebar outsides, sliding sleeve one side is connected with mount table, opposite side and inserted block and is connected, the mount table is connected with at least one connecting rod towards the one end upside of sliding sleeve, the sliding sleeve runs through and is provided with the through-hole that supplies the connecting rod to pass, sliding sleeve one side is connected with the mounting motor, the output shaft end connection of mounting motor has drive lead screw, drive lead screw threaded connection has the fixed strip, the sliding sleeve is provided with the connecting hole that supplies mounting motor's output shaft and drive lead screw card to go into, supplies the fixed orifices that the fixed strip was placed and slided, fixed orifices and through-hole intercommunication, both ends all are provided with the fixed slot that supplies the fixed strip card to go into about the connecting rod.

By adopting the technical scheme, the depth of soil breaking and taking can be improved, and the application range is enlarged. For example: after the soil breaking device is driven to move downwards, the mounting table provided with the soil breaking device is limited by the aid of the blocking piece below, the fixing strip is driven by the fixing motor to be separated from the fixing groove, the driving oil cylinder is used for jacking the sliding sleeve, the sliding sleeve slides upwards along the connecting rod to the fixing strip to be opposite to the fixing groove on the upper side, then the fixing motor drives the fixing strip to be clamped into the corresponding fixing groove, the sliding sleeve is fixed relative to the mounting table, and finally the driving oil cylinder continues to drive the soil breaking device to move downwards.

Optionally, the upper end of the connecting rod is connected with a limiting disc.

Through adopting above-mentioned technical scheme, the slip cap is difficult for relative connecting rod to deviate from when shifting up, and relatively fixed is effectual.

Optionally, a positioning device is arranged at the bottom of the cart, the positioning device comprises a threaded rod in threaded connection with the bottom plate, a positioning rod is connected to the lower end of the threaded rod, and positioning blades are connected to the outer side of the positioning rod.

Through adopting above-mentioned technical scheme, when the shallow promoted to the sample place, rotated the threaded rod for locating lever and location blade bore into the soil layer, make shallow and soil layer relatively fixed, guarantee that the shallow can not unexpected activity under the operating condition.

Optionally, the rotating shaft is arranged in a hollow mode and is used for a threaded rod to penetrate through, and the upper end of the threaded rod is connected with a rotating handle.

Through adopting above-mentioned technical scheme, conveniently rotate the threaded rod, and the locating lever is located the bottom plate middle part, and location effect is good.

Optionally, the threaded rod is staggered with the axis of the rotating shaft, a fixed rod penetrates through the end of the rotating handle in a movable mode, the fixed rod is vertically arranged, a clamping block is connected to the upper side of the rotating disc, and a clamping groove for the clamping block to be clamped into is formed in the fixed rod.

Through adopting above-mentioned technical scheme, when the shallow promoted to the sample site, held the dead lever, twisted the turning handle for the locating lever bores in the soil horizon, then rotated the rolling disc to the inserted block and slot cooperation, then twisted the turning handle and transferred to the fixture block upside, loosened the dead lever, the dead lever moves down and the fixture block card is gone into the draw-in groove. At the moment, the distance between the axes of the threaded rod and the rotating shaft is unequal to the distance between the axes of the fixed rod and the rotating shaft, so that the rotating handle and the rotating disc cannot rotate, and the stability of the soil taking process is ensured.

Optionally, the lower end of the fixing rod is fixedly sleeved with a fixing ring.

By adopting the technical scheme, the fixed rod is lifted upwards and then used as a grab handle to drive the rotating handle to rotate, and the fixed ring can prevent the trouble that the fixed rod is lifted upwards and accidentally separated.

In summary, the present application includes at least one of the following beneficial technical effects:

1. the whole soil sampling process is basically and automatically carried out, manual punching and soil sampling are not needed, and time and labor are saved;

2. one driving oil cylinder can drive the soil taking device and the soil breaking device to move up and down, so that the number of driving mechanisms is reduced, and the cost, the weight and the occupied space are reduced;

3. through positioner's setting, when the shallow promoted to the sample place, rotated the threaded rod for locating lever and location blade bore into the soil layer, make shallow and soil layer relatively fixed, guarantee that the shallow can not unexpected activity under the operating condition.

Drawings

FIG. 1 is a schematic diagram of an automatic soil sampler of an embodiment of the present application;

FIG. 2 is a schematic view of an automated soil sampler according to an embodiment of the present application from another perspective;

FIG. 3 is a schematic structural view of a fixing frame and a sliding frame in the embodiment of the present application;

FIG. 4 is a schematic structural diagram of a blocking member in an embodiment of the present application;

FIG. 5 is a schematic structural diagram of a connecting strip in an embodiment of the present application;

FIG. 6 is a schematic view of the sliding frame in the embodiment of the present application;

FIG. 7 is a schematic cross-sectional view of the sliding sleeve, drive screw and retaining strip of FIG. 6 taken along line A-A;

FIG. 8 is a schematic front view of an automatic soil sampler of an embodiment of the present application;

fig. 9 is a schematic structural view of a fixing rod in the embodiment of the present application.

Description of reference numerals: 1. pushing a cart; 11. a base plate; 12. a hand push handle; 13. a roller; 14. rotating the disc; 141. an arc-shaped hole; 15. a rotating shaft; 16. a fixed mount; 161. side strips; 162. carrying out top strip; 163. a blocking member; 1631. a connecting strip; 1632. a blocking motor; 1633. a barrier strip; 1634. a clamping hole; 1635. a movable cavity; 17. a carriage; 171. a sliding sleeve; 1711. a through hole; 1712. connecting holes; 1713. a fixing hole; 172. an installation table; 173. a connecting rod; 1731. fixing grooves; 1732. a limiting disc; 174. fixing a motor; 175. driving the screw rod; 176. a fixing strip; 18. inserting a block; 2. a ground breaking device; 21. a drive motor; 22. a ground breaking drill bit; 3. a soil sampling device; 31. a lifting rod; 32. a soil sampler; 4. a drive device; 41. a driving oil cylinder; 42. a drive block; 421. a slot; 5. a positioning device; 51. a threaded rod; 52. positioning a rod; 53. positioning the blade; 54. rotating the handle; 55. fixing the rod; 551. a card slot; 56. a clamping block; 57. and (4) fixing the ring.

Detailed Description

The present application is described in further detail below with reference to figures 1-9.

The embodiment of the application discloses an automatic soil sampler. Referring to fig. 1, the automatic soil sampler comprises a movable cart 1, wherein the cart 1 is provided with a soil breaking device 2 for removing a soil layer on the surface of the ground, a soil sampling device 3 for taking out a soil sample, a driving device 4 for driving the soil breaking device 2 and the soil sampling device 3 to move downwards, and a positioning device 5 for relatively fixing the cart 1 and the soil layer. When the cart 1 moves to a sampling place, the positioning device 5 fixes the cart 1, and then the soil breaking device 2 and the soil taking device 3 work in sequence to obtain a soil sample.

Referring to fig. 2, the cart 1 includes a bottom plate 11 having a square plate shape, a handle 12 is fixedly connected to one side of the bottom plate 11, and rollers 13 are mounted at four corners below the bottom plate 11. The hand push handle 12 is U-shaped and is obliquely arranged, and an operator can hold the hand push handle 12 to push the bottom plate 11 to move on the ground, so that the hand push handle is suitable for forests, fields and the like with soil quality not too muddy and soft.

Referring to fig. 1 and 2, a rotating disc 14 is rotatably connected to an end of the upper side of the bottom plate 11, which is far away from the handle 12, the rotating disc 14 is in a circular disc shape, a rotating shaft 15 penetrates through the center of the rotating disc 14, the rotating shaft 15 is rotatably connected with the rotating disc 14 and is fixedly connected with the bottom plate 11, a gap is formed between the rotating disc 14 and the bottom plate 11, and the rotating disc 14 can rotate around the rotating shaft 15. Two fixing frames 16 are fixedly connected to the outer part of the upper side of the rotating disc 14, and the two fixing frames 16 are symmetrical relative to the center of the axis of the rotating disc 14. The fixed frame 16 is connected with a sliding frame 17 along the vertical sliding, and the two sliding frames 17 are respectively used for installing the soil breaking device 2 and the soil taking device 3. After the ground breaking device 2 finishes working, the rotating disc 14 rotates, so that the soil taking device 3 can be rotated to the position where the original ground breaking device 2 is located, and the positioning is accurate.

Referring to fig. 2, the driving device 4 includes a driving cylinder 41 and a driving block 42, a cylinder body of the driving cylinder 41 is fixedly connected to an upper side of the bottom plate 11 and located at a side of the handle 12 opposite to the rotation shaft 15, a piston rod of the driving cylinder 41 is disposed upward, and an end portion of the piston rod is fixedly connected to the driving block 42. The rotary plate 14 is provided with an arc-shaped hole 141 through which the cylinder body of the driving cylinder 41 passes, and the arc-shaped hole 141 is provided around the rotating shaft 15 so that the driving cylinder 41 does not cause the rotary plate 14 to be unable to rotate. The rotating disc 14 rotates until the cylinder body of the driving cylinder 41 is positioned at the end of the arc-shaped hole 141, wherein a fixed frame 16 is close to the driving device 4. The side of the sliding frame 17 facing the axial lead of the rotating shaft 15 is fixedly connected with an inserting block 18, and the side of the driving block 42 opposite to the axial lead of the rotating shaft 15 is provided with a slot 421 for the inserting block 18 to be inserted. When the inserting block 18 is inserted into the inserting slot 421, the driving oil cylinder 41 can drive the sliding rack 17 to move up and down along the fixed rack 16, and further drive the soil breaking device 2 and the soil sampling device 3 to move up and down, thereby completing the punching and soil sampling operations.

Referring to fig. 1 and 2, the ground breaking device 2 includes a driving motor 21 and a ground breaking drill 22, the driving motor 21 is fixedly connected to the upper side of one end of the sliding frame 17 far away from the rotating shaft 15, an output shaft of the driving motor 21 is arranged downward and penetrates through the sliding frame 17, and the ground breaking drill 22 is fixedly connected with the output shaft of the driving motor 21. The earth-breaking drill 22 comprises a rod body and a spiral slice fixedly connected to the outside of the rod body, and the lower end of the rod body is conical. And starting the driving motor 21 and the driving oil cylinder 41, enabling the earth breaking drill 22 to rotate to drill into the earth, lifting the earth and taking the earth out to form a deep hole.

Referring to fig. 1 and 2, the soil sampling device 3 includes a lifting rod 31 and a soil sampler 32, the lifting rod 31 is fixedly connected to one end of the sliding frame 17 far away from the rotating shaft 15, the lifting rod 31 is vertically arranged, and the lower end of the lifting rod is in threaded connection with the soil sampler 32. The structure of the soil sampler 32 is a common cutting ring soil sampler structure, and comprises an upper cover, a left half cylinder, a right half cylinder, a lower cutter head and a cutting ring arranged between the two half cylinders, and the specific structure is the prior art and is not described in detail. The upper cover is in threaded connection with the lifting rod 31, the upper cover, the half cylinder and the lower cutter head are disassembled after the soil sampler 32 is unscrewed, and the cutting ring with the soil sample is taken out to obtain the required sample.

Referring to fig. 1 and 2, one end of the rotating disc 14 far away from the handle 12 protrudes relative to the bottom plate 11, so that the soil breaking device 2 and the soil sampling device 3 mounted on the sliding frame 17 are directly opposite to the soil layer when rotating to the working position. When the two sliding frames 17 are equal in height, the horizontal height of the soil sampler 32 is lower than the lower end of the ground breaking drill bit 22, so that the soil sampler 32 can be smoothly clamped into the hole subsoil to finish soil sampling.

Referring to fig. 2 and 3, the fixing bracket 16 includes two side bars 161 vertically disposed and fixedly connected to the rotary disk 14, a top bar 162 fixedly connected between upper ends of the two side bars 161, and a blocking member 163 disposed at a lower side of the top bar 162. Two blocking members are arranged and are respectively positioned at the upper end and the lower end of the fixed frame 16, and the blocking member 163 is used for blocking the sliding frame 17 from moving downwards. When the sliding frame 17 is obstructed by the upper blocking member 163 and the driving block 42 moves to the highest position, the corresponding positions of the insertion block 18 and the slot 421 are at the same level, so that the insertion block 18 can rotate along with the rotating disc 14 to be inserted into the slot 421.

Referring to fig. 3 and 4, the blocking member 163 includes a connecting bar 1631, a blocking motor 1632 and a blocking bar 1633, the connecting bar 1631 is horizontally disposed and fixedly connected between the two side bars 161, the blocking motor 1632 is fixedly connected to the lower side of the connecting bar 1631, and the output shaft of the blocking motor 1632 is upwardly disposed and fixedly connected to one end of the blocking bar 1633.

Referring to fig. 4 and 5, the connecting bar 1631 is provided with a locking hole 1634 for locking the output shaft of the blocking motor 1632, and a movable cavity 1635 for placing and rotating the blocking bar 1633. The blocking motor 1632 can drive the blocking bar 1633 to rotate, so that the end of the blocking bar 1633 rotates out of the movable cavity 1635, and the sliding frame 17 is blocked by the blocking bar 1633 and cannot move downwards. When the soil breaking device 2 or the soil taking device 3 needs to work, the blocking motor 1632 drives the blocking strip 1633 to rotate back to the movable cavity 1635, and the sliding frame 17 can be driven to move downwards.

Referring to fig. 3 and 6, the sliding frame 17 includes a sliding sleeve 171 sleeved between the outer sides of the two side bars 161, and one side of the sliding sleeve 171 is connected with a mounting platform 172 and the other side is fixedly connected with the insert block 18. The mounting platform 172 is used for being fixedly connected with the ground breaking motor or the lifting rod 31. The mounting block 172 is located at the lower side of the sliding sleeve 171, and the blocking bar 1633 can be rotated to the lower side of the mounting block 172 to block the mounting block 172 from moving downward. Two connecting rods 173 are fixedly connected to the upper side of one end of the mounting table 172 facing the sliding sleeve 171. A through hole 1711 for the connecting rod 173 to pass through is arranged in the sliding sleeve 171, and a fixed motor 174 is fixedly connected to the side of the sliding sleeve 171 opposite to the insert block 18. The upper end of the connecting rod 173 is fixedly connected with a limiting disc 1732, and the diameter of the limiting disc 1732 is larger than that of the connecting rod 173.

Referring to fig. 6 and 7, an output shaft of the fixed motor 174 extends into the sliding sleeve 171 and is fixedly connected with a driving screw 175, and the sliding sleeve 171 is provided with a connecting hole 1712 into which the output shaft of the fixed motor 174 and the driving screw 175 are inserted. The driving screw 175 is threadedly connected with a fixing bar 176, and the fixing bar 176 is horizontally disposed and perpendicular to the driving screw 175. The sliding sleeve 171 is provided with a fixing hole 1713 for the fixing strip 176 to be placed and to slide along the driving screw 175, the fixing hole 1713 is communicated with the through hole 1711, and fixing grooves 1731 for the fixing strip 176 to be clamped into are arranged at the upper end and the lower end of the connecting rod 173 towards one side of the fixing motor 174.

Referring to fig. 6 and 7, when the fixing motor 174 drives the fixing bar 176 to move to be clamped into the fixing groove 1731, the sliding sleeve 171 is fixed relative to the mounting platform 172; when the fixing motor 174 drives the fixing bar 176 to move to be dislocated with the through hole 1711, the sliding sleeve 171 can slide up and down relative to the mounting platform 172. Namely, the sliding sleeve 171 and the mounting platform 172 have two relatively fixed positions, so as to increase the depth of the soil breaking device 2 and the soil sampling device 3 moving downwards and obtain a soil sample at a deeper depth.

Referring to fig. 8 and 9, the positioning device 5 includes a threaded rod 51 penetrating through the bottom plate 11, the threaded rod 51 is vertically disposed and is in threaded connection with the bottom plate 11, a rotating handle 54 is fixedly connected to the upper end of the threaded rod 51, a positioning rod 52 is fixedly connected to the lower end of the threaded rod, a positioning blade 53 spirally disposed is fixedly connected to the outer side of the positioning rod 52, and the lower end of the positioning rod 52 is conical. The rotating shaft 15 is hollow and is provided with a threaded rod 51 to pass through, and the threaded rod 51 is staggered with the axis of the rotating shaft 15. A fixing rod 55 is movably arranged at the end part of the rotating handle 54 along the vertical direction in a penetrating way, the fixing rod 55 can slide upwards and downwards along the axial direction, and a fixing ring 57 is fixedly connected to the outer side of the lower end of the fixing rod 55. Two clamping blocks 56 are fixedly connected to the upper side of the rotating disc 14, the two clamping blocks 56 are centrosymmetric relative to the rotating shaft 15, the rotating handle 54 can rotate until the lower end of the fixing rod 55 is opposite to the clamping blocks 56, and a clamping groove 551 for the clamping blocks 56 to clamp is arranged at the lower end of the fixing rod 55.

Referring to fig. 1 and 8, when the cart 1 is pushed to a sampling site, the rotating handle 54 is driven to rotate, the threaded rod 51 moves downwards, so that the positioning rod 52 and the positioning blade 53 are drilled into a soil layer, and the cart 1 is relatively fixed with the soil layer; then, the soil breaking device 2 is rotated to the working position, and the position of the rotating handle 54 is adjusted, so that the fixing rod 55 is rotated to the upper side of one clamping block 56; then the fixing rod 55 is loosened, the clamping block 56 is clamped into the clamping groove 551, and the distance between the axes of the threaded rod 51 and the rotating shaft 15 is not equal to the distance between the axes of the fixing rod 55 and the rotating shaft 15, so that the rotating handle 54 and the rotating disc 14 cannot rotate; similarly, when the soil sampling device 3 needs to work, the fixing rod 55 is lifted up, the rotating disc 14 is rotated by 180 degrees, and the fixing rod 55 is moved down to the clamping block 56 to be clamped into the clamping groove 551.

The implementation principle of the automatic soil sampler in the embodiment of the application is as follows:

first, the positions of the breaking device 2 and the soil sampling device 3 are adjusted to the initial state. At this time, when the fixing bar 176 is caught in the lower fixing groove 1731, the slide holder 171 is brought into contact with the mount table 172, and the carriage 17 is slid to a high position and is restricted by the upper stopper 163.

Subsequently, move to the sampling site. After the cart 1 is pushed to the sampling site, the fixing rod 55 is lifted up and held, the rotating handle 54 is twisted, so that the threaded rod 51 moves downwards, and the positioning rod 52 and the positioning blade 53 penetrate into the soil layer to complete positioning.

Then, the ground breaking device 2 operates. The sliding frame 17 and the fixed frame 16 provided with the soil breaking device 2 are close to the driving device 4 to rotate until the inserting block 18 is clamped into the inserting groove 421, the soil breaking device 2 is in the working position, the rotating handle 54 is rotated until the fixed rod 55 is positioned on the upper side of one clamping block 56, then the fixed rod 55 is moved downwards, and the clamping block 56 is clamped into the clamping groove 551. The blocking motor 1632 on the upper side is started firstly, so that the blocking strip 1633 rotates back to the movable cavity 1635, the driving oil cylinder 41 and the ground breaking motor are started, the ground breaking drill bit 22 rotates and moves downwards to realize punching, the driving oil cylinder 41 resets after the punching is completed, the ground breaking motor stops working, and the blocking motor 1632 drives the blocking strip 1633 to rotate out.

Finally, the soil sampling device 3 is operated. The fixing rod 55 is lifted up, the rotating disc 14 is rotated by 180 degrees, so that the soil sampling device 3 is moved to the working position, the other inserting block 18 is clamped into the slot 421, the fixing rod 55 is moved down, and the clamping block 56 is clamped into the clamping slot 551. The blocking motor 1632 on the upper side is started firstly, so that the blocking strip 1633 is rotated back to the movable cavity 1635, the driving oil cylinder 41 and the soil breaking motor are started again, the soil sampler 32 is clamped into soil, the driving oil cylinder 41 is reset after the soil sampler is completed, the blocking motor 1632 drives the blocking strip 1633 to rotate out, and an operator unscrews the soil sampler 32 again and replaces the soil sampler with a new one.

When a soil sample at a deeper depth needs to be obtained, the soil breaking device 2 and the soil taking device 3 also need to operate as follows: after the driving oil cylinder 41 drives the sliding frame 17 to move downwards until the sliding frame 17 is hindered by the blocking piece 163 on the lower side, the fixing motor 174 drives the fixing strip 176 to be separated from the fixing groove 1731, the driving oil cylinder 41 jacks up the sliding sleeve 171, the sliding sleeve 171 slides upwards along the connecting rod 173 to the fixing groove 1731 on the upper side opposite to the fixing strip 176, then the fixing motor 174 drives the fixing strip 176 to be clamped into the corresponding fixing groove 1731, the sliding sleeve 171 is relatively fixed with the mounting table 172, and finally the driving oil cylinder 41 continues to drive the sliding frame 17 provided with the soil breaking device 2 or the soil taking device 3 to move downwards continuously. The resetting process is the same.

The above embodiments are preferred embodiments of the present application, and the protection scope of the present application is not limited by the above embodiments, so: all equivalent changes made according to the structure, shape and principle of the present application shall be covered by the protection scope of the present application.