Polishing device for pipeline machining

Abstract

The utility model belongs to the technical field of pipeline machining, and particularly relates to a polishing device for pipeline machining. Comprising a bottom plate, and a mounting groove is transversely formed in the top of the bottom plate; the first driving mechanism is arranged in the mounting groove; the U-shaped mounting plate is fixedly mounted in the center of the top of the bottom plate; the telescopic end of the air cylinder penetrates through the U-shaped mounting plate and is fixedly provided with a first polishing mechanism. A vertical groove is formed in one side, close to the U-shaped mounting plate, of the assembly block; connecting rods are fixedly mounted on the sides, close to the U-shaped mounting plate, of the sliding blocks, and second polishing mechanisms are fixedly mounted at the ends, away from the sliding blocks, of the connecting rods. The second driving mechanism is installed in the vertical groove and used for driving the sliding block to move up and down. The pipeline polishing device is simple in structure and reasonable in design, the outer wall and the inner wall of a pipeline do not need to be polished in sequence when the pipeline is polished, the inner wall and the outer wall of the pipeline can be synchronously polished, the polishing efficiency is high, and the working efficiency of workers can be effectively improved.

Description

TECHNICAL FIELD

[0001] The utility model belongs to pipeline processing technical field, concretely relates to a polishing device for pipeline processing. BACKGROUND

[0002] Pipeline is usually used for transporting gas and liquid, which is mainly connected by pipe, connecting material and valve, and is very common in life, such as when transporting edible water and natural gas, pipeline is used, and pipeline has certain thickness, and polishing device is used to polish pipeline in the processing process;

[0003] The polishing device in the prior art can polish the outer wall and the inner wall of the pipeline, but the polishing is carried out in sequence, and the polishing of the outer wall and the inner wall of the pipeline is often completed gradually, so that a certain time is consumed in the whole process, and the processing efficiency is low, which is not conducive to use. UTILITY MODEL CONTENT

[0004] The utility model aims at providing a polishing device for pipeline processing, which can polish the inner wall and the outer wall of the pipeline synchronously without polishing the outer wall and the inner wall of the pipeline in sequence, has high polishing efficiency and can effectively improve the work efficiency of workers.

[0005] To achieve the above technical purpose, the utility model adopts the following technical scheme:

[0006] A polishing device for pipeline processing, comprising

[0007] A bottom plate is provided with a supporting assembly at the bottom, and a mounting groove is formed horizontally at the top of the bottom plate.

[0008] A first driving mechanism is arranged in the mounting groove.

[0009] A placing mechanism is installed on the upper side of the first driving mechanism.

[0010] A U-shaped mounting plate is fixedly installed at the central top of the bottom plate.

[0011] A gas cylinder is fixedly installed at the top of the bottom plate, and the telescopic end of the gas cylinder penetrates through the U-shaped mounting plate and is fixedly installed with a first polishing mechanism.

[0012] An assembly block is fixedly installed at the right side of the top of the bottom plate, and a vertical groove is formed in the side close to the U-shaped mounting plate.

[0013] A sliding block is slidingly assembled in the vertical groove, a connecting rod is fixedly installed on the side close to the U-shaped mounting plate of the sliding block, and a second polishing mechanism is fixedly installed on the end away from the sliding block of the connecting rod.

[0014] A second driving mechanism is mounted inside the vertical groove and used for driving the slider to move up and down;

[0015] A controller is mounted on the front side of the U-shaped mounting plate, and the first driving mechanism, the second driving mechanism, the first polishing mechanism and the second polishing mechanism are electrically connected with the controller.

[0016] As a preferred technical scheme, the first driving mechanism comprises a first lead screw, two ends of the first lead screw are rotationally connected with the inner walls on the left and right sides of the mounting groove respectively, a first motor is fixedly installed on the left side of the bottom plate, an output shaft of the first motor extends into the mounting groove and is in transmission connection with the first lead screw, a moving block is slidably assembled inside the mounting groove, the moving block is in threaded connection with the first lead screw, an installation block is fixedly installed on the upper side of the moving block, the placing mechanism is installed on the upper side of the installation block, and the first motor is electrically connected with the controller.

[0017] As a preferred technical scheme, the placing mechanism comprises a fixed plate, the fixed plate is fixedly installed on the upper side of the installation block, a connecting block is fixedly installed on the left and right sides of the top of the fixed plate, a through groove is formed in the side of each of the two connecting blocks which is close to each other, and two rotating assemblies are slidably assembled inside the two through grooves;

[0018] The rotating assembly comprises two displacement blocks, the two displacement blocks are slidably assembled inside the two through grooves respectively, and the displacement blocks are rotationally assembled with a transmission roller on the side which is close to each other.

[0019] A bidirectional screw rod is rotationally assembled on the rear inner wall of the right through groove, the front end of the bidirectional screw rod penetrates through the two displacement blocks in sequence and extends out of the connecting block, a rotating disc is fixedly installed on the front end of the bidirectional screw rod, the rear displacement block is in threaded connection with the right-hand thread segment of the bidirectional screw rod, and the front displacement block is in threaded connection with the left-hand thread segment of the bidirectional screw rod.

[0020] A transmission mechanism is mounted on the left side of the left connecting block, and the rotating shafts of the two transmission rollers extend out of the displacement blocks and are in transmission connection with the transmission mechanism.

[0021] As a preferred technical scheme, the transmission mechanism comprises an installation box body, the installation box body is fixedly installed on the left side of the left connecting block.

[0022] The rotating shaft of the transmission roller extends out of a displacement block and is fixedly installed with a crown gear, an L-shaped mounting rod is fixedly installed on the left side of the displacement block, a gear is rotatably assembled on the side close to the crown gear of the L-shaped mounting rod, a toothed column is rotatably assembled on the inner walls of the front and rear sides of the mounting box body, the gear is located between the toothed column and the crown gear, the gear is meshed with the crown gear and the toothed column, a second motor is fixedly installed on the front side of the mounting box body, the output shaft of the second motor is in transmission connection with the toothed column, and the second motor is electrically connected with the controller.

[0023] As a preferred technical scheme, the first polishing mechanism comprises a first stabilizing block, the top of the first stabilizing block is fixedly connected with the telescopic end of the air cylinder, a third motor is fixedly installed on the right side of the first stabilizing block, and the output shaft of the third motor passes through the first stabilizing block and is installed with a first polishing wheel.

[0024] The second polishing mechanism comprises a second stabilizing block, the second stabilizing block is fixedly installed at the end, away from the sliding block, of the connecting rod, a fourth motor is fixedly installed on the left side of the second stabilizing block, and the output shaft of the fourth motor is installed with a second polishing wheel.

[0025] The third motor and the fourth motor are electrically connected with the controller.

[0026] As a preferred technical scheme, the second driving mechanism comprises a second lead screw, the two ends of the second lead screw are rotatably connected with the inner walls on the upper and lower sides of the vertical groove respectively, the sliding block is in threaded connection with the second lead screw, a fifth motor is fixedly installed on the top of the assembly block, the output shaft of the fifth motor is in transmission connection with the second lead screw, and the fifth motor is electrically connected with the controller.

[0027] The utility model discloses the beneficial effect is:

[0028] When polishing the pipeline, the inner wall and the outer wall of the pipeline can be polished simultaneously along with the displacement of the pipeline, and the polishing effect is good, the polishing efficiency is high, the working efficiency of the staff can be effectively improved, and the interval between the two transmission rollers can be adjusted only by rotating the rotating disc, so that the pipeline with different diameters can be placed, the applicability is effectively improved, and the operation is simple and convenient. ACCURACY OF DRAWINGS

[0029] The utility model can be further illustrated by the non - limiting embodiment shown in the drawings.

[0030] Figure 1 It is the whole structure schematic diagram of the utility model;

[0031] Figure 2 It is another visual angle structure schematic diagram of the utility model;

[0032] Figure 3A partial structure schematic view of the utility model;

[0033] Figure 4 A transmission mechanism structure schematic view of the utility model.

[0034] The drawing figure: bottom plate 1, installation groove 11, first drive mechanism 2, first lead screw 21, first motor 22, moving block 23, mounting block 24, support assembly 201, placing mechanism 3, fixed plate 31, connecting block 32, through slot 34, displacement block 35, transmission roller 36, two-way threaded rod 37, installation box body 38, crown gear 381, L-shaped mounting rod 382, second motor 383, gear 384, tooth column 385, turntable 386, U-shaped mounting plate 4, air cylinder 5, first polishing mechanism 51, first stabilizing block 511, third motor 512, first polishing wheel 513, assembly block 6, vertical slot 61, sliding block 62, connecting rod 63, second polishing mechanism 64, second stabilizing block 641, fourth motor 642, second polishing wheel 643, second drive mechanism 7, second lead screw 71, fifth motor 72, controller 8. DETAILED DESCRIPTION

[0035] In order to make those skilled in the art better understand the utility model, the utility model technical scheme is further explained below in connection with the drawings and examples.

[0036] As Figures 1-4 The utility model discloses a polishing device for pipeline processing, including

[0037] Bottom plate 1 is installed with support assembly 201 at the bottom, and the top of bottom plate 1 is provided with installation groove 11 horizontally;

[0038] First drive mechanism 2 is arranged in the inside of installation groove 11, and specifically, first drive mechanism 2 includes first lead screw 21, and the both ends of first lead screw 21 are rotatably connected with the left and right two side inner walls of installation groove 11, and first motor 22 is fixedly installed on the left side of bottom plate 1, the output shaft of first motor 22 extends into installation groove 11 and is transmissionally connected with first lead screw 21, moving block 23 is slidably assembled in the inside of installation groove 11, moving block 23 is screw-connected with first lead screw 21, and mounting block 24 is fixedly installed on the upper side of moving block 23, placing mechanism 3 is installed on the upper side of mounting block 24, and first motor 22 is electrically connected with controller 8.

[0039] In use, the output shaft of the first motor 22 can be controlled by the control end of the controller 8 to rotate forward or reverse, thereby driving the first lead screw 21 to rotate forward or reverse. Since the moving block 23 is threadedly connected with the first lead screw 21, the first lead screw 21 can drive the moving block 23 to move left and right. When the pipeline is placed on the placing mechanism 3, the moving block 23 is driven to move, thereby driving the pipeline to move towards the first polishing mechanism 51 and the second polishing mechanism 64, so as to polish the outer wall and the inner wall of the pipeline. After polishing, the pipeline can be restored to the original position and removed, which is convenient and efficient.

[0040] The placing mechanism 3 is installed on the upper side of the first driving mechanism 2. Specifically, the placing mechanism 3 comprises a fixed plate 31 fixedly installed on the upper side of the mounting block 24. The top and both sides of the fixed plate 31 are fixedly installed with connecting blocks 32. The side close to each other of the two connecting blocks 32 is provided with a through slot 34. The two through slots 34 are internally and jointly provided with two rotating assemblies.

[0041] The rotating assembly comprises two displacement blocks 35, which are respectively and slidably assembled in the two through slots 34. The side close to each other of the two displacement blocks 35 is jointly and rotatably provided with a transmission roller 36. The transmission roller 36 is composed of a rotating shaft and a transmission layer. The transmission layer is fixedly connected with the rotating shaft and located at the peripheral part of the rotating shaft. The transmission layer has a large friction force and can drive the pipeline to rotate.

[0042] The rear inner wall of the right through slot 34 is rotatably provided with a bidirectional screw rod 37. The front end of the bidirectional screw rod 37 penetrates through the two displacement blocks 35 and extends out of the connecting block 32. The front end of the bidirectional screw rod 37 is fixedly installed with a rotating disc 386. The rear displacement block 35 is threadedly connected with the right-hand thread segment of the bidirectional screw rod 37. The front displacement block 35 is threadedly connected with the left-hand thread segment of the bidirectional screw rod 37.

[0043] The left side of the left connecting block 32 is provided with a transmission mechanism. The rotating shafts of the two transmission rollers 36 extend out of the displacement blocks 35 and are transmissionally connected with the transmission mechanism.

[0044] In the initial state, the distance between the two transmission rollers 36 is adjusted according to the diameter of the pipeline. When adjusting, the rotating disc 386 is rotated, the rotating disc 386 drives the bidirectional screw rod 37 to rotate, the bidirectional screw rod 37 drives the two displacement blocks 35 on the right to move close to each other and away from each other, thereby driving the two transmission rollers 36 to move close to each other and away from each other. After the adjustment is completed, the pipeline is placed between the two transmission rollers 36. The staff drives the transmission mechanism, which can drive the two transmission rollers 36 to rotate towards the same direction. The transmission roller 36 drives the pipeline to rotate. In subsequent pipeline polishing, the entire pipeline can be polished, and the polishing effect is good.

[0045] The transmission mechanism comprises a mounting box 38 fixedly installed on the left side of the left connecting block 32;

[0046] The rotating shaft of the transmission roller 36 extends out of the displacement block 35 and is fixedly installed with a crown gear 381. The left side of the displacement block 35 is fixedly installed with an L-shaped mounting rod 382. The L-shaped mounting rod 382 is rotatably assembled with a gear 384 on the side close to the crown gear 381. The inner walls of the front and rear sides of the mounting box 38 are rotatably assembled with a toothed column 385. The gear 384 is located between the crown gear 381 and the toothed column 385. The gear 384 is in meshing connection with the crown gear 381 and the toothed column 385. The front side of the mounting box 38 is fixedly installed with a second motor 383. The output shaft of the second motor 383 is in transmission connection with the toothed column 385. The second motor 383 is in electrical connection with the controller 8.

[0047] The staff starts the second motor 383. The second motor 383 drives the toothed column 385 to rotate. The meshing teeth arranged around the periphery of the toothed column 385 are in meshing connection with the gear 384 at all times. In turn, the gear 384 is driven to rotate. The gear 384 drives the crown gear 384 to rotate. The crown gear 384 drives the transmission roller 36 to rotate. As shown in FIG. 4, the installation directions of the two crown gears 384 and the two gears 384 are consistent. Therefore, the rotating directions of the two transmission rollers 36 are consistent. Since the toothed column 385 has a certain length, the two gears 384 can still be in meshing connection with the toothed column 385 at all times when they are displaced forward and backward. This facilitates the adjustment of the distance and the driving by the toothed column 385. Therefore, the use is more convenient. Figure 4

[0048] The U-shaped mounting plate 4 is fixedly installed on the top center of the bottom plate 1.

[0049] The air cylinder 5 is fixedly installed on the top of the bottom plate 1. The telescopic end of the air cylinder 5 penetrates through the U-shaped mounting plate 4 and is fixedly installed with a first polishing mechanism 51.

[0050] The assembly block 6 is fixedly installed on the top right side of the bottom plate 1. The assembly block 6 is provided with a vertical groove 61 on the side close to the U-shaped mounting plate 4.

[0051] The sliding block 62 is slidingly assembled in the vertical groove 61. The sliding block 62 is fixedly installed with a connecting rod 63 on the side close to the U-shaped mounting plate 4. The connecting rod 63 is fixedly installed with a second polishing mechanism 64 on the end away from the sliding block 62. Specifically, the first polishing mechanism 51 comprises a first stabilizing block 511. The first stabilizing block 511 is fixedly connected with the telescopic end of the air cylinder 5 on the top. The first stabilizing block 511 is fixedly installed with a third motor 512 on the right side. The output shaft of the third motor 512 penetrates through the first stabilizing block 511 and is installed with a first polishing wheel 513.

[0052] ​The second polishing mechanism 64 comprises a second stabilizing block 641 fixedly installed at one end of the connecting rod 63 away from the sliding block 62, and a fourth motor 642 fixedly installed at the left side of the second stabilizing block 641, and a second polishing wheel 643 installed on the output shaft of the fourth motor 642.

[0053] The third motor 512 and the fourth motor 642 are electrically connected with the controller 8.

[0054] The workers can drive the first polishing wheel 513 and the second polishing wheel 643 to rotate to polish the pipeline by driving the third motor 512 and the fourth motor 642 to start through the controller 8. When polishing, the workers need to start the air cylinder 5 to make the telescopic end of the air cylinder 5 drive the first polishing wheel 513 to contact the outer wall of the pipeline, and according to the diameter of the pipeline, the workers need to control the second driving mechanism 7 to start in advance, so that the connecting rod 63 is located at the position inside the pipeline. After the pipeline moves to the specified position, the second polishing wheel 643 is driven to contact the inner wall of the pipeline to polish by driving the connecting rod 63 to move upwards. With the driving of the first driving mechanism 2 and the rotation of the pipeline, the polishing of the entire pipeline can be completed between reciprocating movements, and the inner wall and the outer wall are polished at the same time, which can effectively improve the work efficiency of the workers.

[0055] The second driving mechanism 7 is installed in the vertical groove 61 and is used to drive the sliding block 62 to move up and down. Specifically, the second driving mechanism 7 comprises a second lead screw 71, both ends of the second lead screw 71 are rotatably connected with the inner walls of the upper and lower sides of the vertical groove 61, the sliding block 62 is threadedly connected with the second lead screw 71, a fifth motor 72 is fixedly installed at the top of the assembly block 6, the output shaft of the fifth motor 72 is in transmission connection with the second lead screw 71, and the fifth motor 72 is electrically connected with the controller 8.

[0056] Under the control of the controller 8, the output shaft of the fifth motor 72 can rotate forward and reversely, thereby driving the second lead screw 71 to rotate forward or reversely. Since the sliding block 62 is threadedly connected with the second lead screw 71, the sliding block 62 can be driven to move up and down, so that the second polishing wheel 643 can abut against the inner wall of the pipeline.

[0057] The controller 8 is installed on the front side of the U-shaped mounting plate 4, and the first driving mechanism 2, the second driving mechanism 7, the first polishing mechanism 51 and the second polishing mechanism 64 are electrically connected with the controller 8.

[0058] The use mode of the device is as follows:

[0059] In the initial state, the distance between the two transmission rollers 36 is adjusted according to the pipe diameter, and the adjustment is directly rotating the rotating disc 386, the rotating disc 386 drives the bidirectional threaded rod 37 to rotate, the bidirectional threaded rod 37 drives the two displacement blocks 35 to move close to each other or move away from each other, and then drives the two transmission rollers 36 to move close to each other or move away from each other, then the pipe is placed between the two transmission rollers 36, and then the controller 8 controls the fifth motor 72 to start, drives the sliding block 62 to move up or down to the position inside the pipe,

[0060] The subsequent worker starts the first motor 22, so that the first screw rod 21 drives the moving block 23 to move, drives the pipe to move close to the first polishing wheel 513 and the second polishing wheel 643, and then starts the air cylinder 5 and the fifth motor 72, controls the first polishing wheel 513 to contact the pipe peripheral part, and the first polishing wheel 643 moves up to contact the inner wall of the pipe, starts the second motor 383, the second motor 383 drives the gear column 385 to rotate, the gear column 385 drives the gear 384 to rotate, the gear 384 drives the two crown gears 381 to rotate, and finally the two transmission rollers 36 drive the pipe to rotate; the worker starts the third motor 512 and the fourth motor 642, drives the first polishing wheel 513 and the second polishing wheel 643 to rotate to polish the pipe, and when polishing, the first motor 22 drives the moving block 23 to move slowly, cooperates with the rotating pipe, can complete the simultaneous polishing of the inner wall and the outer wall of the pipe, and the polishing effect is good, after polishing, the third motor 512 and the fourth motor 642 are closed, and the pipe is reset and the pipe is taken down.

[0061] The above embodiments only exemplarily illustrate the principle and effect of the utility model, and are not used to limit the utility model. Any person skilled in the art can modify or change the above embodiments without departing from the spirit and scope of the utility model. Therefore, all equivalent modifications or changes completed by those skilled in the art without departing from the spirit and technical thought disclosed by the utility model should be covered by the claims of the utility model.

Claims

1. A polishing apparatus for pipe processing, characterized in that: include A base plate (1) is provided with a support assembly (201) at the bottom and a mounting groove (11) is provided horizontally at the top of the base plate (1). The first drive mechanism (2) is disposed inside the mounting slot (11); Placement mechanism (3), which is mounted on the upper side of the first drive mechanism (2); U-shaped mounting plate (4), which is fixedly installed at the top center of the base plate (1); Cylinder (5), the cylinder (5) is fixedly installed on the top of the base plate (1), the telescopic end of the cylinder (5) passes through the U-shaped mounting plate (4) and is fixedly installed with the first polishing mechanism (51); Assembly block (6), the assembly block (6) is fixedly installed on the top right side of the base plate (1), and the assembly block (6) has a vertical groove (61) on the side near the U-shaped mounting plate (4); The slider (62) is slidably assembled inside the vertical groove (61). A connecting rod (63) is fixedly installed on the side of the slider (62) near the U-shaped mounting plate (4). A second polishing mechanism (64) is fixedly installed on the end of the connecting rod (63) away from the slider (62). The second drive mechanism (7) is installed inside the vertical groove (61) and is used to drive the slider (62) to move up and down. The controller (8) is installed on the front side of the U-shaped mounting plate (4). The first drive mechanism (2), the second drive mechanism (7), the first polishing mechanism (51) and the second polishing mechanism (64) are all electrically connected to the controller (8).

2. The polishing apparatus for pipe processing according to claim 1, characterized in that: The first drive mechanism (2) includes a first lead screw (21), the two ends of which are rotatably connected to the inner walls of the left and right sides of the mounting groove (11), respectively. A first motor (22) is fixedly installed on the left side of the base plate (1). The output shaft of the first motor (22) extends into the mounting groove (11) and is connected to the first lead screw (21) in a transmission manner. A moving block (23) is slidably assembled inside the mounting groove (11). The moving block (23) is threadedly connected to the first lead screw (21). An mounting block (24) is fixedly installed on the upper side of the moving block (23). The placement mechanism (3) is installed on the upper side of the mounting block (24). The first motor (22) is electrically connected to the controller (8).

3. The polishing apparatus for pipe processing according to claim 2, characterized in that: The placement mechanism (3) includes a fixing plate (31), which is fixedly installed on the upper side of the mounting block (24). Connecting blocks (32) are fixedly installed on the top left and right sides of the fixing plate (31). Two connecting blocks (32) are provided with through slots (34) on the side close to each other. Two rotating components are slidably assembled inside the two through slots (34). The rotating assembly includes two displacement blocks (35), which are slidably mounted inside two through slots (34) respectively. The two displacement blocks (35) are close to each other on one side and are rotatably mounted with a transmission roller (36). A bidirectional threaded rod (37) is rotatably mounted on the rear inner wall of the through groove (34) on the right side. The front end of the bidirectional threaded rod (37) passes through two displacement blocks (35) in sequence and extends out of the connecting block (32). A turntable (386) is fixedly installed on the front end of the bidirectional threaded rod (37). The rear displacement block (35) is threadedly connected to the forward thread section of the bidirectional threaded rod (37), and the front displacement block (35) is threadedly connected to the reverse thread section of the bidirectional threaded rod (37). A transmission mechanism is installed on the left side of the connecting block (32) on the left side, and the rotating shafts of the two transmission rollers (36) extend out of the displacement block (35) and are connected to the transmission mechanism for transmission.

4. The polishing apparatus for pipe processing according to claim 3, characterized in that: The transmission mechanism includes a mounting housing (38), which is fixedly mounted on the left side of the left connecting block (32); The shaft of the transmission roller (36) extends out of the displacement block (35) and is fixedly mounted with a crown gear (381). An L-shaped mounting rod (382) is fixedly mounted on the left side of the displacement block (35). A gear (384) is rotatably mounted on the side of the L-shaped mounting rod (382) near the crown gear (381). A toothed column (385) is rotatably mounted on the inner walls of the front and rear sides of the mounting box (38). The gear (384) is located between the crown gear (381) and the toothed column (385). The gear (384) meshes with the crown gear (381) and the toothed column (385). A second motor (383) is fixedly mounted on the front side of the mounting box (38). The output shaft of the second motor (383) is connected to the toothed column (385). The second motor (383) is electrically connected to the controller (8).

5. A polishing apparatus for pipe processing according to claim 1, characterized in that: The first polishing mechanism (51) includes a first stabilizing block (511), the top of the first stabilizing block (511) is fixedly connected to the telescopic end of the cylinder (5), and a third motor (512) is fixedly installed on the right side of the first stabilizing block (511). The output shaft of the third motor (512) passes through the first stabilizing block (511) and is equipped with a first polishing wheel (513). The second polishing mechanism (64) includes a second stabilizing block (641), which is fixedly installed on the end of the connecting rod (63) away from the slider (62). A fourth motor (642) is fixedly installed on the left side of the second stabilizing block (641), and a second polishing wheel (643) is installed on the output shaft of the fourth motor (642). The third motor (512) and the fourth motor (642) are both electrically connected to the controller (8).

6. A polishing apparatus for pipe processing according to claim 1, characterized in that: The second drive mechanism (7) includes a second lead screw (71), the two ends of which are rotatably connected to the inner walls of the upper and lower sides of the vertical groove (61), the slider (62) is threadedly connected to the second lead screw (71), the top of the assembly block (6) is fixedly mounted with a fifth motor (72), the output shaft of the fifth motor (72) is drivenly connected to the second lead screw (71), and the fifth motor (72) is electrically connected to the controller (8).

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