Pipe clamping conveyor

Abstract

The application relates to a pipeline clamping conveying device and belongs to the technical field of pipeline clamping conveying devices, which comprises a guide rail. The application can form double clamping on a pipeline workpiece through the relative arrangement of a main rotating cylinder and a clamping rotating cylinder, can avoid the cantilever deflection problem caused by single-point clamping, can improve the stability and coaxiality of the pipeline workpiece during machining, can ensure machining precision, and can complete clamping of the pipeline when a clamping motor operates. When a rotating motor operates, the main rotating cylinder and the clamping rotating cylinder can be synchronously rotated through linkage components such as a cross rod and a cross limiting cylinder. When a stepping motor operates, the axial accurate conveying of the pipeline workpiece can be realized. Then, through the combination of a rotating rod driven by the rotating motor and a ring gear transmission, circumferential rotation machining of the pipeline workpiece can be completed, and the pipeline multi-station and multi-angle machining requirements can be met.

Description

Technical Field

[0001] This application relates to pipe clamping and conveying devices, and more particularly to a pipe clamping and conveying device. Background Technology

[0002] In the field of machining long shaft workpieces such as pipes and bars, the common machining methods are "fixed workpiece, moving tool" or "single-point clamping, cantilever machining".

[0003] However, most of the above-mentioned fixing methods fix one end of the long pipe on the machine tool with a chuck, making the pipe itself unable to move or only able to rotate. When it is necessary to process different axial positions of the pipe, a precision moving mechanism is required to drive the processing tool to move to the designated coordinate point for operation. This processing mode not only increases the complexity of the equipment and manufacturing cost, but also affects the processing accuracy due to the cumulative error during the tool movement process. Especially for long pipes, single-point clamping can easily cause the workpiece to generate cantilever deflection during processing, which in turn causes vibration or deformation, reducing the quality of the processed surface and dimensional accuracy. In order to solve the above problems, a pipe clamping and conveying device is proposed. Utility Model Content

[0004] The purpose of this application is to provide a pipe clamping and conveying device, which has the advantages of pipe clamping and conveying functions, and solves the problem of cantilever deflection caused by single-point clamping in the existing long shaft workpiece processing, as well as the problems of increased equipment complexity, increased cost and affected processing accuracy caused by the movement of processing tools.

[0005] The pipe clamping and conveying device provided in this application adopts the following technical solution: it includes a guide rail, a clamping shaft is fixedly connected to the top of the guide rail, a main shaft is slidably connected to the top of the guide rail, a clamping rotating cylinder is rotatably connected inside the clamping shaft through a bearing, a main rotating cylinder is rotatably connected inside the main shaft through a bearing, a feed cylinder is provided at the input end of the main rotating cylinder, and a discharge cylinder is provided at the output end of the clamping rotating cylinder; The main rotating cylinder has a sliding groove inside, and a clamping block is slidably connected inside the sliding groove. A transmission groove is formed on the inner side of the sliding groove, and a transmission gear is tightly nested inside the inner side of the transmission groove via bearings. A toothed plate is fixedly connected to the side of the clamping block, and the toothed plate meshes with the transmission gear. A rotating groove is formed on the outer side of multiple transmission grooves, and a rotating ring is rotatably connected inside the rotating groove. An inner ring gear and an outer ring gear are fixedly connected to the inner and outer sides of the rotating ring, respectively, and the inner ring gear meshes with the transmission gear. A clamping motor is fixedly connected to the outer side of the main rotating cylinder, and a power gear is fixedly connected to the output end of the clamping motor. The power gear meshes with the outer ring gear. The internal structure of the clamping rotating cylinder is the same as that of the main rotating cylinder. The clamping rotating cylinder also has all the internal structures of the main rotating cylinder and is positioned above the guide rail opposite to the main rotating cylinder. By adopting the above technical solution, and by setting the main rotating cylinder and the clamping rotating cylinder in a relative configuration, a double clamping can be formed for the pipe workpiece, which can avoid the cantilever deflection problem caused by single-point clamping. When the pipe workpiece enters the main rotating cylinder from the feed cylinder, the clamping motor starts and drives the power gear to rotate. The power gear meshes with the ring external gear, causing the rotating ring to rotate in the rotating groove. Then, the ring internal gear drives the transmission gear to rotate. The transmission gear cooperates with the toothed plate and pushes the clamping block to move along the slide groove towards the center, thereby achieving stable clamping of the pipe workpiece. The clamping rotating cylinder adopts the same clamping structure and maintains a synchronous clamping state during pipe transportation, ensuring the stability of the workpiece during processing.

[0006] Preferably, the clamping shaft has a power groove inside, the main shaft has a through groove inside, a fixing block is fixedly connected inside the through groove, a stepper motor is fixedly connected to the inner side of the power groove, a threaded rod is fixedly connected to the output end of the stepper motor, a threaded cylinder is threadedly connected to the surface of the threaded rod, and the fixing block is fixedly connected to the surface of the threaded cylinder. By adopting the above technical solution, and by setting a stepper motor, the operation of the stepper motor can drive the threaded rod to rotate. Since the threaded cylinder is threadedly connected to the threaded rod and fixed to the main shaft through a fixing block, when the threaded rod rotates, the threaded cylinder will drive the main shaft to move along the axial direction of the power groove, thereby realizing the relative extension and retraction between the main shaft and the clamping shaft.

[0007] Preferably, a U-shaped frame is provided on the top of the guide rail, the threaded rod shaft end is rotatably connected to the inner side of the U-shaped frame, and a first folding sleeve is provided between the U-shaped frame and the fixing block, and between the fixing block and the power groove, and the threaded rod is located inside the first folding sleeve; By adopting the above technical solution and setting the first folding sleeve, the threaded rod can be completely wrapped inside, which can prevent external dust, debris and other impurities from entering the power groove and the through groove, and avoid wear or jamming of the threaded fit between the threaded rod and the threaded cylinder.

[0008] Preferably, both the clamping rotating cylinder and the main rotating cylinder are fixedly connected to ring gears. The clamping shaft and the inner side of the main shaft are provided with meshing grooves. The inner side of the two meshing grooves is tightly nested with rotating rods through bearings. One end of each of the two rotating rods is fixedly connected to a rotating gear. The other end of one rotating rod is fixedly connected to a cross bar. The other end of the other rotating rod is fixedly connected to a cross limiting cylinder. One end of the cross bar is slidably connected in the cross limiting cylinder and is fixedly connected to a cross limiting block. The cross limiting block is slidably connected in the cross limiting cylinder. The two rotating gears mesh with the two ring gears respectively. A rotary motor is fixedly connected to the side of the main shaft. The output end of the rotary motor rotates through the meshing groove and is fixedly connected to one end of the rotating rod. By adopting the above technical solution, a rotary motor can drive the connected rotary rod to rotate, which in turn drives the rotary gear to rotate synchronously. Since the rotary gear meshes with the ring gear, it further drives the main rotary cylinder and the clamping rotary cylinder to rotate, achieving the synchronous rotational conveying function of the pipeline. Simultaneously, the crossbar slides within the cross-shaped limiting cylinder, and in conjunction with the limiting action of the cross-shaped limiting block, ensures that the two rotary rods maintain a stable linkage during rotation, avoiding relative displacement deviation. This improves the stability and reliability of the device during operation and ensures that the pipeline maintains good coaxiality throughout the clamping and conveying process.

[0009] Preferably, a second folding sleeve is provided between the main shaft and the clamping shaft, and the crossbar and the cross limiting cylinder are both accommodated in the second folding sleeve; By adopting the above technical solution, the transmission components between the main shaft and the clamping shaft can be fully enclosed and protected by the second folding sleeve, which can prevent external oil, water vapor and metal debris from entering the gap between the crossbar and the cross limit cylinder.

[0010] Preferably, a protective shell is provided on the outside of the power gear and the annular external gear, and the protective shell is located on one side of the main shaft; By adopting the above technical solution and setting a protective shell, the meshing area between the power gear and the ring external gear can be effectively shielded, preventing external dust, debris and other impurities from entering the gear meshing surface and affecting the transmission accuracy.

[0011] Preferably, a wear-resistant layer is fixedly connected to the side of the clamping block; By adopting the above technical solution and setting a wear-resistant layer, the hardness and wear resistance of the contact surface between the clamping block and the pipe workpiece can be significantly improved, which can avoid wear and pitting on the surface of the clamping block caused by long-term clamping friction.

[0012] Preferably, the sliding groove has sliding grooves on both sides inside the sliding groove, and the clamping block has sliding blocks fixedly connected to both sides, and the sliding blocks are slidably connected in the sliding groove. By adopting the above technical solution and setting the cooperation structure of sliding groove and sliding block, the movement direction of clamping block can be precisely guided, and the lateral displacement of clamping block in sliding groove can be limited.

[0013] In summary, this application includes at least one of the following beneficial technical effects: 1. This pipe clamping and conveying device, by setting a main rotating cylinder and a clamping rotating cylinder in a relative arrangement, can form a double clamping of the pipe workpiece, which can avoid the cantilever deflection problem caused by single-point clamping, improve the stability and coaxiality of the pipe workpiece during processing, and ensure processing accuracy. By setting a clamping motor, a rotary motor and a stepper motor, the clamping motor can clamp the pipe when it is running. When the rotary motor is running, the main rotating cylinder and the clamping rotating cylinder can rotate synchronously through linkage components such as crossbars and cross limit cylinders. When the stepper motor is running, the axial precise conveying of the pipe workpiece can be achieved. Then, by combining the rotating rod driven by the rotary motor with the ring gear transmission, the circumferential rotation processing of the pipe workpiece can be completed, meeting the needs of multi-station and multi-angle processing of pipes.

[0014] 2. This pipe clamping and conveying device, through its fully enclosed protective design with a first folding sleeve and a second folding sleeve, effectively protects the threaded rod transmission components and the linkage components such as the crossbar and cross-shaped limiting cylinder, preventing the intrusion of external dust, debris, oil, and moisture, reducing component wear and jamming risks, and extending the service life of the device. Attached Figure Description Figure 1 This is a frontal three-dimensional structural diagram of this application; Figure 2 This is a side-view perspective three-dimensional structural diagram of this application; Figure 3 This is a schematic diagram of the structure in frontal cross-section in this application; Figure 4 This is a schematic diagram of the structure in the side cross-section of this application; Figure 5 This is a structural schematic diagram of the cross-section of the rotating groove in this application; Figure 6 This is a schematic diagram of the rotating ring in this application.

[0015] In the diagram: 1. Guide rail; 101. U-shaped frame; 2. Clamping shaft; 201. Power groove; 202. Stepper motor; 203. Threaded rod; 204. Threaded cylinder; 3. Main shaft; 301. Through groove; 302. Fixing block; 303. Engaging groove; 304. Rotating rod; 305. Rotating gear; 306. Cross bar; 307. Cross limit block; 308. Cross limit cylinder; 4. First folding sleeve; 5. Main rotating cylinder; 501. Ring gear; 502. Slide groove; 5 03. Clamping block; 504. Sliding groove; 505. Sliding block; 506. Transmission groove; 507. Transmission gear; 508. Tooth plate; 509. Wear-resistant layer; 5010. Rotating groove; 5011. Rotating ring; 5012. Protective shell; 5013. Annular internal gear; 5014. Annular external gear; 5015. Clamping motor; 5016. Power gear; 6. Clamping rotating cylinder; 7. Rotating motor; 8. Second folding sleeve; 9. Discharge cylinder; 10. Feed cylinder. Detailed Implementation

[0016] The following is in conjunction with the appendix Figure 1 - Appendix Figure 6 This application will be described in further detail below.

[0017] Example 1: A pipe clamping and conveying device, referring to Figure 1 , Figure 2 , Figure 3 , Figure 5 and Figure 6 It includes a guide rail 1, a clamping shaft 2 fixedly connected to the top of the guide rail 1, a main shaft 3 slidably connected to the top of the guide rail 1, a clamping rotating cylinder 6 rotatably connected inside the clamping shaft 2 through a bearing, a main rotating cylinder 5 rotatably connected inside the main shaft 3 through a bearing, a feed cylinder 10 is provided at the input end of the main rotating cylinder 5, and a discharge cylinder 9 is provided at the output end of the clamping rotating cylinder 6. The main rotating cylinder 5 has a sliding groove 502 inside, and a clamping block 503 is slidably connected inside the sliding groove 502. A transmission groove 506 is formed on the inner side of the sliding groove 502, and a transmission gear 507 is tightly nested inside the transmission groove 506 via bearings. A toothed plate 508 is fixedly connected to the side of the clamping block 503, and the toothed plate 508 meshes with the transmission gear 507. Rotating grooves 5010 are formed on the outer sides of the multiple transmission grooves 506, and a rotating ring 5011 is rotatably connected inside the rotating groove 5010. An inner ring gear 5013 and an outer ring gear 5014 are fixedly connected to the inner and outer sides of the rotating ring 5011, respectively. The inner ring gear 5013 meshes with the transmission gear 507. A clamping motor 5015 is fixedly connected to the outer side of the main rotating cylinder 5, and a power gear 5016 is fixedly connected to the output end of the clamping motor 5015. The power gear 5016 meshes with the outer ring gear 5014. The internal structure of the clamping rotating cylinder 6 and the main rotating cylinder 5 is... The main rotating cylinder 5 has the same internal structure as the main rotating cylinder 5, and is positioned above the guide rail 1 opposite to the main rotating cylinder 5. By setting the main rotating cylinder 5 and the clamping rotating cylinder 6 relative to each other, the pipe workpiece can be double-clamped, which can avoid the cantilever deflection problem caused by single-point clamping. When the pipe workpiece enters the main rotating cylinder 5 from the feed cylinder 10, the clamping motor 5015 starts, driving the power gear 5016 to rotate. The power gear 5016 meshes with the external ring gear 5014, causing the rotating ring 5011 to rotate in the rotating groove 5010. Then, the internal ring gear 5013 drives the transmission gear 507 to rotate. The transmission gear 507 cooperates with the toothed plate 508 to push the clamping block 503 to move towards the center along the slide groove 502, thereby achieving stable clamping of the pipe workpiece. The clamping rotating cylinder 6 adopts the same clamping structure and maintains a synchronous clamping state during pipe transportation, ensuring the stability of the workpiece during processing.

[0018] Please see Figure 2 and Figure 3The clamping shaft 2 has a power groove 201 inside, and the main shaft 3 has a through groove 301 inside. A fixing block 302 is fixedly connected inside the through groove 301. A stepper motor 202 is fixedly connected to the inner side of the power groove 201. A threaded rod 203 is fixedly connected to the output end of the stepper motor 202. A threaded cylinder 204 is threadedly connected to the surface of the threaded rod 203. The fixing block 302 is fixedly connected to the surface of the threaded cylinder 204. By setting the stepper motor 202, the operation of the stepper motor 202 can drive the threaded rod 203 to rotate. Since the threaded cylinder 204 is threadedly connected to the threaded rod 203 and fixed to the main shaft 3 through the fixing block 302, when the threaded rod 203 rotates, the threaded cylinder 204 will... The main shaft 3 moves along the axial direction of the power groove 201, thereby realizing the relative extension and retraction between the main shaft 3 and the clamping shaft 2. A U-shaped frame 101 is provided on the top of the guide rail 1. The shaft end of the threaded rod 203 is rotatably connected to the inner side of the U-shaped frame 101. A first folding sleeve 4 is provided between the U-shaped frame 101 and the fixed block 302, and between the fixed block 302 and the power groove 201. The threaded rod 203 is located inside the first folding sleeve 4. By providing the first folding sleeve 4, the threaded rod 203 can be completely wrapped inside, which can prevent external dust, debris and other impurities from entering the power groove 201 and the through groove 301, and avoid wear or jamming of the threaded fit between the threaded rod 203 and the threaded cylinder 204.

[0019] Please see Figure 2 and Figure 4Both the clamping rotating cylinder 6 and the main rotating cylinder 5 are fixedly connected to the surface of a ring gear 501. The inner sides of the clamping shaft 2 and the main shaft 3 are both provided with meshing grooves 303. Rotating rods 304 are tightly nested within the inner sides of the two meshing grooves 303 via bearings. One end of each rotating rod 304 is fixedly connected to a rotating gear 305. The other end of one rotating rod 304 is fixedly connected to a crossbar 306, and the other end of the other rotating rod 304 is fixedly connected to a cross-shaped limiting cylinder 308. One end of the crossbar 306 is slidably connected within the cross-shaped limiting cylinder 308 and is fixedly connected to a cross-shaped limiting block 307. The cross-shaped limiting block 307... 7 is slidably connected inside the cross-shaped limiting cylinder 308. Two rotating gears 305 mesh with two ring gears 501 respectively. A rotating motor 7 is fixedly connected to the side of the main shaft 3. The output end of the rotating motor 7 rotates through the meshing groove 303 and is fixedly connected to one end of the rotating rod 304. By setting the rotating motor 7, the rotating rod 304 connected to it can be driven to rotate, thereby driving the rotating gears 305 to rotate synchronously. Since the rotating gears 305 and the ring gears 501 mesh with each other, they will further drive the main rotating cylinder 5 and the clamping rotating cylinder 6 to rotate accordingly, realizing the synchronous rotation and conveying function of the pipeline. Meanwhile, the crossbar 306 slides within the cross-shaped limiting cylinder 308, and in conjunction with the limiting effect of the cross-shaped limiting block 307, it can ensure that the two rotating rods 304 maintain a stable linkage relationship during rotation, avoiding relative displacement deviation, which can improve the stability and reliability of the device during operation, and ensure that the pipeline maintains good coaxiality during clamping and conveying. A second folding sleeve 8 is provided between the main shaft 3 and the clamping shaft 2, and both the crossbar 306 and the cross-shaped limiting cylinder 308 are housed in the second folding sleeve 8. By providing the second folding sleeve 8, the transmission components between the main shaft 3 and the clamping shaft 2 can be fully enclosed and protected, which can prevent external oil, water vapor and metal debris from entering the mating gap between the crossbar 306 and the cross-shaped limiting cylinder 308.

[0020] Please see Figure 3 and Figure 5A protective shell 5012 is provided on the outer side of the power gear 5016 and the ring external gear 5014. The protective shell 5012 is located on one side of the main shaft 3. By providing the protective shell 5012, the meshing area of ​​the power gear 5016 and the ring external gear 5014 can be effectively shielded, preventing external dust, debris and other impurities from entering the gear meshing surface and affecting the transmission accuracy. A wear-resistant layer 509 is fixedly connected to the side of the clamping block 503. By providing the wear-resistant layer 509, the contact between the clamping block 503 and the pipe workpiece can be significantly improved. The surface hardness and wear resistance can prevent wear and dents from appearing on the surface of the clamping block 503 due to long-term clamping friction. Sliding grooves 504 are provided on both sides of the sliding groove 502. Sliding blocks 505 are fixedly connected to both sides of the clamping block 503. The sliding blocks 505 are slidably connected in the sliding groove 504. By setting the cooperation structure between the sliding groove 504 and the sliding block 505, the movement direction of the clamping block 503 can be precisely guided, and the lateral displacement of the clamping block 503 in the sliding groove 502 can be limited.

[0021] The implementation principle of this application embodiment is as follows: In use, precise centering and clamping are first performed. When the tube is fed from the feed cylinder 10, the clamping motor 5015 located outside the main rotating cylinder 5 is started, driving the power gear 5016 to rotate. The power gear 5016 drives the annular external gear 5014, thereby causing the entire rotating ring 5011 to rotate. The annular internal gear 5013 on the inner side of the rotating ring 5011 synchronously drives multiple circumferentially distributed transmission gears 507 to rotate. Each transmission gear 507 meshes with a toothed plate 508, and all toothed plates 508 are fixed on the corresponding clamping block 503. Under the drive of the transmission gear 507, all clamping blocks 503 synchronously retract radially towards the center along the slide groove 502, thereby precisely and concentrically clamping the tube. The internal structure of the clamping rotating cylinder 6 at one end of the clamping shaft 2 is exactly the same and can move synchronously, providing stable support for the tube from both ends. Then the whole rotation is performed. When the pipe needs to be circumferentially processed, the rotary motor 7 is started, which can drive the rotating rod 304 in the main shaft 3 and the rotating gear 305 at its end. The rotating gear 305 meshes with the ring gear 501 on the main rotating cylinder 5, thereby driving the clamped pipe to rotate. The rotating rod 304 in the main shaft 3 can transmit the rotational power to the rotating rod 304 on the side of the clamping shaft 2 through the coupling composed of the cross bar 306, the cross limit block 307 and the cross limit cylinder 308, thereby driving the clamping rotating cylinder 6 to rotate synchronously. When the tube needs to be pushed forward to a new processing position, the stepper motor 202 starts, which drives the threaded rod 203 to rotate. The threaded cylinder 204, which meshes with the threaded rod 203, drives the fixed block 302, thereby pushing the entire spindle 3 component to slide precisely along the guide rail 1. During the pushing process, the spindle 3 always clamps the tube for conveying, while the clamping shaft 2 does not clamp the tube. The tube passes through the fixed discharge cylinder 9 and enters the processing area. The processing tools are fixedly installed at different workstations along the process. Each time the tube moves to a position, one process is completed.

Claims

1. A pipe clamping and conveying device, comprising a guide rail (1), characterized in that: The top of the guide rail (1) is fixedly connected to a clamping shaft (2), and the top of the guide rail (1) is slidably connected to a main shaft (3). The clamping shaft (2) is rotatably connected to a clamping rotating cylinder (6) through a bearing. The main shaft (3) is rotatably connected to a main rotating cylinder (5) through a bearing. The input end of the main rotating cylinder (5) is provided with a feed cylinder (10), and the output end of the clamping rotating cylinder (6) is provided with a discharge cylinder (9). The main rotating cylinder (5) has a sliding groove (502) inside, and a clamping block (503) is slidably connected inside the sliding groove (502). A transmission groove (506) is formed on the inner side of the sliding groove (502). A transmission gear (507) is tightly nested inside the inner side of the transmission groove (506) via a bearing. A toothed plate (508) is fixedly connected to the side of the clamping block (503). The toothed plate (508) meshes with the transmission gear (507). A rotating groove (5010) is formed on the outer side of the multiple transmission grooves (506). A rotating ring (5011) is rotatably connected inside the rotating groove (5010). The inner side of the rotating ring (5011) is connected to... An internal ring gear (5013) and an external ring gear (5014) are fixedly connected to the outer side respectively. The internal ring gear (5013) meshes with the transmission gear (507). A clamping motor (5015) is fixedly connected to the outer side of the main rotating cylinder (5). A power gear (5016) is fixedly connected to the output end of the clamping motor (5015). The power gear (5016) meshes with the external ring gear (5014). The internal structure of the clamping rotating cylinder (6) is the same as that of the main rotating cylinder (5). The internal structure of the clamping rotating cylinder (6) is also provided with all the internal structures of the main rotating cylinder (5), and it is arranged above the guide rail (1) opposite to the main rotating cylinder (5).

2. The pipe clamping and conveying device according to claim 1, characterized in that: The clamping shaft (2) has a power groove (201) inside, the main shaft (3) has a through groove (301) inside, a fixing block (302) is fixedly connected inside the through groove (301), a stepper motor (202) is fixedly connected to the inside side of the power groove (201), a threaded rod (203) is fixedly connected to the output end of the stepper motor (202), a threaded cylinder (204) is threadedly connected to the surface of the threaded rod (203), and the fixing block (302) is fixedly connected to the surface of the threaded cylinder (204).

3. The pipe clamping and conveying device according to claim 2, characterized in that: The top of the guide rail (1) is provided with a U-shaped frame (101), and the shaft end of the threaded rod (203) is rotatably connected to the inner side of the U-shaped frame (101). A first folding sleeve (4) is provided between the U-shaped frame (101) and the fixing block (302), and between the fixing block (302) and the power groove (201). The threaded rod (203) is located inside the first folding sleeve (4).

4. The pipe clamping and conveying device according to claim 1, characterized in that: Both the clamping rotating cylinder (6) and the main rotating cylinder (5) are fixedly connected to ring gears (501). The clamping shaft (2) and the main shaft (3) are both provided with meshing grooves (303) on their inner sides. The inner sides of the two meshing grooves (303) are tightly nested with rotating rods (304) through bearings. One end of each of the two rotating rods (304) is fixedly connected to a rotating gear (305). The other end of one rotating rod (304) is fixedly connected to a crossbar (306), and the other end of the other rotating rod (304) is fixedly connected to a crossbar. The limiting cylinder (308) has one end of the cross bar (306) slidably connected inside the cross limiting cylinder (308) and is fixedly connected to the cross limiting block (307). The cross limiting block (307) is slidably connected inside the cross limiting cylinder (308). The two rotating gears (305) mesh with the two ring gears (501) respectively. The main shaft (3) is fixedly connected to the side of the rotating motor (7). The output end of the rotating motor (7) rotates through the meshing groove (303) and is fixedly connected to one end of the rotating rod (304).

5. A pipe clamping and conveying device according to claim 4, characterized in that: A second folding sleeve (8) is provided between the main shaft (3) and the clamping shaft (2), and the cross bar (306) and the cross limiting cylinder (308) are both housed in the second folding sleeve (8).

6. The pipe clamping and conveying device according to claim 1, characterized in that: The power gear (5016) and the annular external gear (5014) are provided with protective shells (5012), which are located on one side of the main shaft (3).

7. A pipe clamping and conveying device according to claim 1, characterized in that: The clamping block (503) has a wear-resistant layer (509) fixedly connected to its side.

8. A pipe clamping and conveying device according to claim 1, characterized in that: The sliding groove (502) has sliding grooves (504) on both sides inside, and the clamping block (503) has sliding blocks (505) fixedly connected to both sides. The sliding blocks (505) are slidably connected in the sliding grooves (504).

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