1. The 3D printing nozzle for the building field is characterized by comprising an upper shell (2), a power driving mechanism, a swash plate (9), a swash plate spring (10), a circular table (24), a rotary disc (25), a plunger (26), a sliding shoe (27), a cylinder body (28), an inner spring (29), a rotary gasket (30), a flow distribution disc (31), a flow guide disc (32), a lower cylinder body (33), a rotating shaft (36) and a swash plate angle adjusting device;

a plurality of channels are uniformly distributed on the cylinder body (28) in the circumferential direction, a groove for mounting an inner spring (9) is formed in the lower portion of the center of the cylinder body (28), the small end of a circular truncated cone (24) is upwards mounted on the cylinder body (28) and rotates with the cylinder body (28), a return disc (25) is arranged on the upper portion of the circular truncated cone (24), a sliding shoe (27) is arranged on the return disc (25), a rotating gasket (30) which rotates with the cylinder body (28) is arranged on the inner side of the lower portion of the cylinder body (28), the inner spring (29) is sleeved on a rotating shaft (36) and arranged above the rotating gasket (30), one end of a plunger (26) is arranged in the channel of the cylinder body (28), and the other end of the plunger (26) is a circular joint matched with the sliding shoe (27);

a diverter plate (31) is arranged at the lower part of the cylinder body (28), a diversion disc (32) is arranged at the lower part of the diverter plate (31), the accelerating agent enters the cylinder body (28) through a preformed hole on the side surface of the lower cylinder body, and two circular arc-shaped channels are converged in a hole at the bottom through a liquid channel on the cylinder body (28), so that the accelerating agent rotates along with the cylinder body (28) and generates periodic channels with the diversion disc (32), and the functions of liquid suction and pumping are realized;

one end of the swash plate (9) is an extension end, the upper surface of the extension end is connected with the upper shell (2) through a swash plate spring (10), and the lower surface of the extension end of the swash plate is provided with an angle adjusting device for driving the extension end to lift so as to realize the angle adjustment of the swash plate; the inner spring (29) is pressed against the cylinder body (28) so as to press against the return disc (25) through the circular truncated cone (24), so that the sliding shoes (27) placed on the return disc are tightly attached to the swash plate (9), and the pumping rapid coagulant amount of the cylinder body is controlled through the angle of the swash plate.

2. The 3D printing head according to claim 1, wherein the circular table (24) rotates with the cylinder (28) through a keyway; the rotating washer (30) rotates together with the rotating shaft (36) through the key groove.

3. The 3D printing nozzle according to claim 2, wherein a stirring blade is arranged on the rotating shaft (36) inside the lower cylinder (33);

the lower part of the lower cylinder body (33) is provided with a printing outlet, a screw rod (42) is arranged in the printing outlet, and the screw rod (42) is fixedly connected with the lower part of the rotating shaft (36);

the side of the lower cylinder body (33) is provided with a concrete slurry inlet, the concrete slurry and the accelerating agent flowing into the lower cylinder body (33) from the flow guide disc (32) are mixed by stirring of the stirring blades, and the mixture is pumped out of the spray head through the screw rod (42), so that 3D printing is realized.

4. 3D print head according to claim 3, characterized in that the swash plate (9) comprises a semicircular plate on both sides of the upper surface, the swash plate (9) has a through hole in the middle, and the lower surface of the extended end of the swash plate (9) has a link (11) connected to the angle adjustment device.

5. The 3D printing head according to claim 4, wherein the swash plate angle adjustment device comprises a push rod (14), a bearing (15), a screw (16), an adjusting hand wheel (17) and a hand wheel outer cylinder (18);

a connecting rod (11) of the swash plate is connected with a push rod (14) through a stud and a nut, a bearing (15) is arranged on the inner side of the lower part of the push rod (14) and is connected with a screw rod (16) through the bearing (15), an adjusting hand wheel (17) is arranged on the lower part of the screw rod (16), the adjusting hand wheel (17) is arranged in a hand wheel outer cylinder (18) and is sealed with the hand wheel outer cylinder (18) through a hand wheel outer cylinder cover (20);

the adjusting hand wheel (17) rotates to enable the screw rod (16) to rotate to ascend or descend, and the push rod (14) connected with the screw rod (16) through the bearing (15) ascends or descends to achieve the adjustment of the angle of the swash plate.

6. 3D printing head according to claim 5, characterized in that said power driving mechanism comprises a motor (8), a motor shaft (37), a coupling half (38) and an elastic gasket (39);

the motor rotating shaft (37) is in key fit with the rotating shaft (36) through a half coupling (38) and an elastic gasket (39), so that the motor (8) drives the rotating shaft to rotate;

the motor is arranged in a groove of the upper shell (2), and the rotating shaft (36) penetrates through a through hole in the middle of the swash plate (9) and penetrates through the cylinder body (28) and the lower cylinder body (33).

7. The 3D printing nozzle according to claim 6, further comprising a delivery pipe (22), wherein a liquid bin is arranged in the upper shell (2), an air pump nozzle (23) is arranged on the upper shell (2), a delivery hole (35) is arranged at the bottom of the outer shell, and the delivery pipe (22) is connected with the liquid bin in the upper shell (2) and the delivery hole (35) at the bottom of the outer shell (1); the delivery hole (35) is connected with a reserved hole of the lower cylinder body (33) through a hose; the air pump nozzle (23) provides pressure to pump the accelerating agent to flow through the lower cylinder body (33) and enter the cylinder body (28).

8. The 3D print head according to claim 7, further comprising a housing (1), the cylinder block (28) and a main body portion of the swash plate angle adjustment device being disposed within the housing (1).

9. The 3D printing nozzle according to claim 8, characterized by further comprising an upper shell cover (4), wherein the outer shell (1) is connected with the upper shell (2) through screws, the upper shell cover (4) is fixed with the upper shell (2) through screws, and the hand wheel outer cylinder (18) is fixed with the outer shell (1) through screws.

Background

3D printing is one of the rapid prototyping technologies, which is a technology for constructing an object by using an adhesive material such as powdered metal or plastic and the like in a layer-by-layer printing manner on the basis of a digital model file.

The 3D printing is basically the same as the working principle of a common printer, only the printing materials are different, different printing materials such as metal, ceramic, plastic, sand and the like are arranged in the 3D printer and are actual raw materials, and after the printer is connected with a computer, the printing materials can be stacked layer by layer under the control of the computer, and finally, a blueprint on the computer is changed into an actual object. A 3D printer is a device that can "print" out real 3D objects. There are many different techniques for 3D printing. They differ in the way the building components are built up in different layers, in the way the materials are available.

When the 3D printing is used in the field of buildings, in order to improve the strength of a building forming part, various additives need to be accurately added in a quantitative mode according to a proportion, under the background, the invention provides a novel concrete 3D printing spray head component device, the device can realize the functions of fully mixing concrete slurry and a liquid accelerating agent and extruding, and meanwhile, the device can control the using amount of the liquid accelerating agent so as to meet the requirement of required concrete, and hardware support is provided for smoothly performing the 3D printing of the concrete.

Disclosure of Invention

The invention aims to provide a 3D printing spray head used in the field of buildings, which is used for solving the problems that concrete slurry and a liquid accelerator are fully and uniformly stirred and the dosage can be controlled to be finally extruded.

The technical solution for realizing the purpose of the invention is as follows: A3D printing nozzle used in the building field comprises an upper shell, a power driving mechanism, a swash plate spring, a circular table, a rotary disc, a plunger, a sliding shoe, a cylinder body, an inner spring, a rotary gasket, a flow distribution disc, a flow guide disc, a lower cylinder body, a rotating shaft and a swash plate angle adjusting device;

a plurality of channels are uniformly distributed in the circumferential direction of the cylinder body, a groove for mounting an inner spring is formed in the lower portion of the center of the cylinder body, the small end of the circular truncated cone is upwards mounted on the cylinder body and rotates along with the cylinder body, a return stroke disc is arranged on the upper portion of the circular truncated cone, a sliding shoe is arranged on the return stroke disc, a rotating gasket which rotates along with the cylinder body is arranged on the inner side of the lower portion of the cylinder body, an inner spring is sleeved on a rotating shaft and arranged above the rotating gasket, one end of a plunger is arranged in the channel of the cylinder body, and the other end of the plunger is a circular joint matched with the sliding shoe;

the lower part of the cylinder body is provided with a splitter disc, the lower part of the splitter disc is provided with a flow guide disc, the accelerating agent enters the cylinder body through a preformed hole on the side surface of the lower cylinder body, and two circular arc-shaped channels are converged in a hole at the bottom through a liquid channel on the cylinder body, so that the accelerating agent and the cylinder body rotate along with the cylinder body to generate periodic channels with the flow guide disc, and the functions of liquid suction and pumping are realized;

one end of the swash plate is an extension end, the upper surface of the extension end is connected with the upper shell through a swash plate spring, and the lower surface of the extension end of the swash plate is provided with an angle adjusting device for driving the extension end to lift so as to realize the angle adjustment of the swash plate; the inner spring props against the cylinder body, so that the round table props against the return stroke disc, the sliding shoes placed on the return stroke disc are tightly attached to the swash plate, and the pumping rapid hardening agent amount of the cylinder body is controlled through the angle of the swash plate.

Further, the circular truncated cone rotates along with the cylinder body through the key slot; the rotating gasket rotates together with the rotating shaft through the key slot.

Further, a rotating shaft in the lower cylinder body is provided with a stirring blade;

the lower part of the lower cylinder body is provided with a printing outlet, a screw rod is arranged in the printing outlet, and the screw rod is fixedly connected with the lower part of the rotating shaft;

the lower cylinder side is equipped with concrete slurry body entry, and concrete slurry body and the accelerator that flows into in the lower cylinder from the guiding disk mix through the stirring of stirring leaf, send out the shower nozzle through the screw rod pump, realize 3D and print.

Furthermore, the swash plate comprises semicircular plates arranged on two sides of the upper surface, a through hole is formed in the middle of the swash plate, and a connecting rod connected with the angle adjusting device is arranged on the lower surface of the extending end of the swash plate.

Furthermore, the swash plate angle adjusting device comprises a push rod, a bearing, a screw rod, an adjusting hand wheel and a hand wheel outer cylinder;

a connecting rod of the swash plate is connected with a push rod through a stud and a nut, a bearing is arranged on the inner side of the lower part of the push rod and is connected with a screw rod through the bearing, an adjusting hand wheel is arranged on the lower part of the screw rod, the adjusting hand wheel is arranged in an outer barrel of the hand wheel and is sealed with the outer barrel of the hand wheel through an outer barrel cover of the hand wheel;

the adjusting hand wheel rotates to enable the screw to rotate to ascend or descend, and the push rod connected with the screw through the bearing ascends or descends to achieve adjustment of the angle of the swash plate.

Furthermore, the power driving mechanism comprises a motor, a motor rotating shaft, a half coupling and an elastic gasket;

the motor rotating shaft is matched with the key of the rotating shaft through the half coupling and the elastic gasket, so that the motor drives the rotating shaft to rotate;

the motor is arranged in the groove of the upper shell, and the rotating shaft penetrates through the through hole in the middle of the swash plate and penetrates through the cylinder body and the lower cylinder body.

The liquid storage tank is arranged in the upper shell, the air pump nozzle is arranged on the upper shell, the conveying hole is formed in the bottom of the outer shell, and the conveying pipe is connected with the liquid storage tank in the upper shell and the conveying hole in the bottom of the outer shell; the conveying hole is connected with a preformed hole of the lower cylinder body through a hose; the air pump nozzle provides pressure to pump the accelerating agent to flow through the lower cylinder body and enter the cylinder body.

Further, the swash plate angle adjusting device further comprises a shell, and the cylinder body and the main body part of the swash plate angle adjusting device are arranged in the shell.

Furthermore, the hand wheel outer cylinder is fixed with the shell through screws.

Compared with the prior art, the invention has the remarkable advantages that:

according to the invention, through a structure similar to a slope plunger pump, the consumption of the accelerator is controlled, the accelerator is conveyed, and the accelerator is mixed with the slurry, uniformly stirred and normally extruded to form a 3D printing concrete sprayer capable of being normally used; meanwhile, the motor can slowly rotate reversely when printing is stopped in the process of printing to prevent the residual materials from flowing out; the design structure is compact and ingenious, and the space application is reasonable.

Drawings

Fig. 1 is a front view of the overall structure of the 3D printing head according to the present invention.

Fig. 2 is a left side view of the overall structure of the 3D printing head of the present invention.

Fig. 3 is a sectional view taken along the direction B-B in fig. 2.

Fig. 4 is a sectional view taken along a-a in fig. 2.

Fig. 5 is a cross-sectional view taken along the direction D-D in fig. 1.

Fig. 6 is a sectional view taken along the direction C-C in fig. 1.

Fig. 7 is a top view of the overall structure of the 3D printing head according to the present invention.

Fig. 8 is a bottom view of the overall structure of the 3D printing head according to the present invention.

Fig. 9 is a schematic view of the structure of the rotating shaft of the present invention.

FIG. 10 is a schematic view of the structure of the stirring blade of the present invention.

Fig. 11 is a three-dimensional schematic diagram of a 3D printing head according to the present invention.

Fig. 12 is a front view of the internal structure of the 3D printing head according to the present invention.

Description of reference numerals:

1-housing, 2-upper housing, 3-first cylinder head screw, 4-upper housing cover, 5-second cylinder head screw, 6-liquid bin cover, 7-third cylinder head screw, 8-motor, 9-swash plate, 10-swash plate spring, 11-connecting rod, 12-first stud, 13-first hexagon nut, 14-push rod, 15-bearing, 16-screw rod, 17-adjusting hand wheel, 18-outer hand wheel cylinder, 19-fourth cylinder head screw, 20-outer hand wheel cylinder cover, 21-fifth cylinder head screw, 22-delivery pipe, 23-air pump nozzle, 24-circular table, 25-return disc, 26-plunger, 27-slipper, 28-cylinder block, 29-inner spring, 30-rotary gasket, 31-a diverter disc, 32-a deflector disc, 33-a lower cylinder body, 34-a sixth cylindrical screw, 35-a conveying hole, 36-a rotating shaft, 37-a motor rotating shaft, 38-a half coupling, 39-an elastic gasket, 40-a second stud, 41-a second hexagon nut, 42-a screw rod and 43-a stirring blade.

Detailed Description

The present invention is described in further detail below with reference to the attached drawing figures.

As shown in fig. 1 to 12, a 3D printing head apparatus includes: the device comprises a shell 1, an upper shell 2, a first cylindrical head screw 3, an upper shell cover 4, a second cylindrical head screw 5, a liquid bin cover 6, a third cylindrical head screw 7 and a motor 8; the device comprises a swash plate 9, a swash plate spring 10, a connecting rod 11, a first stud 12, a first hexagon nut 13, a push rod 14, a bearing 15, a screw 16, an adjusting hand wheel 17, a hand wheel outer cylinder 18, a fourth cylindrical head screw 19, a hand wheel outer cylinder cover 20 and a fifth cylindrical head screw 21; the device comprises a delivery pipe 22, an air pump spray head 23, a circular truncated cone 24, a return disc 25, a plunger 26, a sliding shoe 27, a cylinder body 28, an inner spring 29, a rotary gasket 30, a flow distribution disc 31, a flow guide disc 32, a lower cylinder body 33, a sixth cylindrical screw 34 and a delivery hole 35; the device comprises a rotating shaft 36, a motor rotating shaft 37, a half coupling 38, an elastic gasket 39, a second stud 40, a second hexagonal nut 41, a screw rod 42 and a stirring blade 43.

The shell 1 and the upper shell 2 are connected through a first cylindrical head screw 3. And the upper shell cover 4 is fixed with the upper shell 2 through a second cylindrical head screw 5. The space for storing the accelerator liquid is sealed by fixing the liquid bin cover 6 by a third cylindrical head screw 7. The motor 8 is installed in a circular groove reserved in the upper shell 2. The upper part of the extended end of the semi-cylindrical swash plate 9 is connected with the upper shell 2 through a swash plate spring 10. The lower part is connected with the connecting rod 11 through a first stud 12 and two first hexagon nuts 13. The other end of the connecting rod 11 is also connected with a push rod 14 through a first stud 12 and two first hexagon nuts 13. And a bearing 15 is arranged in a groove at the lower part of the push rod 14, a screw rod 16 is fixed in the middle of the bearing, and the other end of the screw rod 16 is screwed in a threaded hole of an adjusting hand wheel 17. The adjusting hand wheel 17 is placed in the hand wheel outer cylinder 18, and the hand wheel outer cylinder cover 20 and the hand wheel outer cylinder 18 are sealed by a fourth cylindrical head screw 19. The adjusting hand wheel 17 can only rotate in the hand wheel outer cylinder 18, so that the adjusting hand wheel 17 rotates to enable the screw 16 to extend rotationally through the threaded hole, and the push rod 14 only ascends and shortens without rotating to generate interference with the swash plate 9 because the other end of the push rod is connected with the bearing 15. Meanwhile, the outer cylinder 18 of the hand wheel is fixed with the shell 1 by a fifth cylindrical head screw 21.

The delivery pipe 22 is a delivery hole 35 connecting the accelerator liquid bin in the upper shell 2 and the bottom of the shell 1. The delivery hole 35 can then be connected to the reserved hole of the lower cylinder 33 through a hose, and the pressure is provided by the air pump nozzle 23 on the upper shell 2 to achieve the effect that the pumping accelerator flows through the lower cylinder 33 and enters the cylinder 28.

The boss 24 is mounted on the cylinder 28 for rotation therewith by a keyway. The plunger 26 is captured at its upper end in the shoe 27 and at its lower end in the channel of the cylinder 28. And the shoes 27 are placed on the return disc 25. The inner spring 29 is housed inside the cylinder 28, the lower part of which abuts against a rotating washer 30 placed inside a deflector disc 32. The rotary washer 30 rotates together with the rotary shaft 36 through the key groove. This is designed to prevent the inner spring 29 from being worn and bent by the upper end contacting the cylinder 28 rotating together with the shaft 36 and the lower end directly contacting the stationary deflector disc 32. The rotary gasket 30 and the cylinder block 28 rotate together with the rotating shaft 36, so that the relative rest is achieved, the inner spring 29 can normally act, the cylinder block 28 can be propped against, the return disc 25 is propped against by the round table 24 arranged on the cylinder block, the slipper 27 arranged on the cylinder block can be enabled to be tightly attached to the swash plate 9, and the design goal of controlling the pumping quantity of the quick setting agent of the cylinder block through the angle of the swash plate can be normally achieved. The diverter disc 31 is installed at the bottom of the cylinder 28, and is used for converging 8 liquid channels on the cylinder 28 into two circular arc-shaped channels in a hole at the bottom, so that the circular arc-shaped channels are formed by the circular arc-shaped channels and the diverter disc 32 along with the rotation of the cylinder 28, and the liquid is distinguished to achieve the functions of liquid suction and pumping. The lower cylinder 33 is connected to the housing 1 by a sixth cylindrical screw 34. The rotating shaft 36 and the motor rotating shaft 37 are matched with keys on the rotating shaft 36 and the motor rotating shaft 37 through a coupling which is fixed by four second studs 40 and eight second hexagon nuts 41 after an elastic gasket 39 is clamped between two half couplings 38, so that the purposes of connecting the rotating shaft 36 and the motor rotating shaft 37 and enabling the motor 8 to normally drive the rotating shaft 36 are achieved. And the screw rod 42 is fixed to the lower portion of the rotation shaft 36 by means of a screw thread at the upper end thereof. And four sets of stirring blades 43 fixed to the rotary shaft 36 through key slots to rotate together therewith for stirring the concrete slurry and the liquid accelerator in the lower cylinder 33. And then pumped out of the nozzle by screw 42 to function as an extrusion.

The 3D printing nozzle provided by the invention has the following working process:

the high-pressure gas is delivered through the air pump nozzle 23 to squeeze the setting accelerator in the setting accelerator bin, so that the setting accelerator is pumped through the delivery pipe 22 and then enters the delivery hole 35, and then enters the reserved hole of the lower cylinder body through the hose and flows into the cylinder body 28. The cylinder block 28 rotates together with the rotary shaft 36 through the key groove while having a set inclination angle due to the swash plate 9. The inner spring 29 presses the return disc 25 so that the shoe 27 thereon can abut against the swash plate 9 and rotate with the cylinder block 28 carrying the plunger 26, so that the plunger 26 rotates at a certain inclination angle, and performs the operation of sucking and pressing the liquid up and down in the passage of the cylinder block 28. Thereby pumping a metered amount of accelerator out of cylinder 28 through diverter disc 31 and deflector disc 32 into lower cylinder 33. Mixing with the slurry pumped into the lower cylinder 33 by the feeding system, and simultaneously, the stirring blades 43 on the lower cylinder can continuously stir and mix the accelerator and the slurry due to the rotation of the rotating shaft 36. The spray head is then pumped out by the screw rod 42 to complete the stirring, mixing, extruding operations and objectives. And the adjusting hand wheel 17 beside the lower cylinder body 33 can realize the angle control of the swash plate 9, so as to control the amount of the accelerator to be sucked. The adjusting hand wheel 17 is rotated to rotate the screw 16 screwed in the thread and extend or shorten, and the other end of the adjusting hand wheel is fixed with the bearing 15, so that the aim of extending or shortening the push rod 14 can be fulfilled, the swash plate spring 10 connected with the extending end of the swash plate 9 is pressed or pulled up, the swash plate 9 is maintained at a required angle, and the dosage of liquid is controlled.