Pipe clamping device and laser pipe cutting apparatus

Abstract

This application discloses a tube clamping device and a laser tube cutting equipment, including a drive mechanism, a mounting frame, a buffer mechanism, and a clamping mechanism. The first roller in the buffer mechanism supports the tube and is elastically connected to the mounting frame via a first elastic element. Radial runout generated during tube rotation is buffered by the first elastic element, reducing periodic impacts on the entire device. Simultaneously, the two clamping members of the clamping mechanism are driven by the drive assembly and clamp the other two sides of the tube, providing auxiliary limiting. The clamping mechanism and the buffer mechanism are located on opposite sides of the mounting frame, with a reasonable arrangement to avoid motion interference. Furthermore, the drive mechanism and the buffer mechanism are located on the same side, which also avoids motion interference with the clamping mechanism. Additionally, it ensures a relatively balanced center of gravity for the components on both sides of the mounting frame, reducing the gravitational torque exerted on the drive mechanism by the mounting frame and its mechanisms.

Description

Technical Field

[0001] This application relates to the field of laser processing, and in particular to a tube clamping device and a laser tube cutting equipment. Background Technology

[0002] A laser tube cutting machine is a high-end processing equipment integrating laser technology, CNC systems, and precision mechanics, primarily used for the precise cutting of metal tubes. It utilizes the thermal effect of a laser to cut the metal tube; specifically, a focused laser irradiates the tube surface, instantly raising the local temperature to thousands of degrees Celsius, causing the material to melt or vaporize. Simultaneously, a coaxial auxiliary gas (nitrogen / oxygen) blows away the molten slag, creating a smooth cut. During the cutting process, the tube's end is clamped by a jig and driven by a motor to rotate around its central axis.

[0003] In related technologies, some laser tube cutting machines also incorporate a clamping mechanism. The tube can still rotate within this mechanism, which primarily serves a supporting role to reduce sagging under gravity. However, due to the considerable length of the tube, sagging cannot be completely avoided. Consequently, radial runout occurs during tube rotation, generating significant periodic loads on the clamping mechanism. This can lead to mechanical fatigue in the clamping mechanism, affecting its lifespan. Utility Model Content

[0004] This application proposes a pipe clamping device and a laser pipe cutting equipment, which can buffer the radial runout caused by the rotation of the pipe.

[0005] This application discloses a tube clamping device, comprising:

[0006] The drive mechanism is driven in a first direction;

[0007] Mounting bracket, located at the drive end of the drive mechanism;

[0008] The buffer mechanism includes a first roller disposed along one edge of the mounting frame, and a first elastic member connecting the first roller and the mounting frame. The elastic force of the first elastic member causes the side portion of the roller to extend beyond the mounting frame, and the side portion of the first roller extending beyond the mounting frame is used to abut against the pipe.

[0009] The clamping mechanism includes two clamping members slidably disposed on the mounting frame, and a driving assembly for driving the two clamping members to clamp in a centered manner; one end of each clamping member extends beyond the mounting frame and is used to clamp the pipe.

[0010] The clamping mechanism and the buffer mechanism are respectively located on both sides of the mounting frame, and the driving mechanism and the buffer mechanism are located on the same side of the mounting frame.

[0011] In some embodiments, the drive mechanism includes:

[0012] The frame is slidably connected to the mounting bracket along the first direction;

[0013] The motor is mounted on the frame, and its shaft passes through the frame and is positioned toward the mounting bracket;

[0014] A rack is disposed on the mounting bracket and is arranged along the first direction;

[0015] A gear is mounted on the rotating shaft and meshes with the rack.

[0016] In some embodiments, the tube clamping device further includes a limiting member disposed on the frame, the limiting member being able to abut against one side of the first roller to limit the relative sliding travel between the frame and the mounting bracket.

[0017] In some embodiments, the buffer mechanism further includes:

[0018] The hinge seats are located at both ends of the first roller and are rotatably connected to the first roller;

[0019] A guide seat is provided on the mounting bracket, and the hinge seat is slidably connected to the guide seat. The sliding direction is along a first direction, and the first elastic element is provided between the hinge seat and the guide seat.

[0020] In some embodiments, the direction of movement of the clamping member during centering and clamping is along the length direction of the first roller; the clamping mechanism further includes a first slider slidably connected to the mounting frame, and the clamping member includes a second roller disposed on the first slider, the second roller intersecting the first roller.

[0021] In some embodiments, one end of the second roller away from the mounting bracket is a clamping end, and the other end is a hinged end that is hinged to the first slider. The second roller is capable of swinging around the hinged end on the first slider. The clamping mechanism further includes a second elastic element connecting the first slider and the second roller. The elastic force of the second elastic element causes the two clamping ends to swing inward to abut against the tube.

[0022] In some embodiments, the drive assembly further includes a first cylinder disposed on the mounting bracket, and a connecting rod connecting the first cylinder and the first slider, the two connecting rods being symmetrically arranged, and the driving direction of the first cylinder being along a first direction.

[0023] In some embodiments, the drive assembly further includes a second slider slidably disposed on the mounting bracket, the second slider sliding along the first direction, and the first cylinder driving the second slider to slide; one end of the two connecting rods is rotatably hinged to the second slider, and the other end is hinged to the two first sliders in a one-to-one correspondence.

[0024] In some embodiments, the drive assembly further includes two second cylinders disposed on the mounting bracket, the second cylinders being configured one-to-one with the first sliders, and the second cylinders being used to drive the two first sliders to move toward each other for centering and clamping.

[0025] This application also proposes a laser tube cutting device, including the aforementioned tube clamping device, and the laser tube cutting device further includes a laser cutting module for cutting tubes.

[0026] The tube clamping device and laser tube cutting equipment in this embodiment include a drive mechanism, a mounting frame, a buffer mechanism, and a clamping mechanism. The first roller in the buffer mechanism supports the tube and is elastically connected to the mounting frame via a first elastic element. Radial runout generated during tube rotation is buffered by the first elastic element, reducing periodic impacts on the entire device. Simultaneously, the two clamping members of the clamping mechanism are driven by the drive assembly and clamp the other two sides of the tube, providing auxiliary limiting. The clamping mechanism and buffer mechanism are located on opposite sides of the mounting frame, with a reasonable arrangement to avoid motion interference. Furthermore, the drive mechanism and buffer mechanism are located on the same side, which also avoids motion interference with the clamping mechanism. Additionally, it ensures a relatively balanced center of gravity for the components on both sides of the mounting frame, reducing the gravitational torque exerted on the drive mechanism by the mounting frame and its mechanisms. Attached Figure Description

[0027] Figure 1 This is a schematic diagram of the pipe clamping device in one embodiment of this application;

[0028] Figure 2 This is a schematic diagram of the pipe clamping device in another embodiment of this application.

[0029] Label Explanation:

[0030] 10. Drive mechanism; 11. Frame; 12. Motor; 13. Rack; 14. Limiting component; 20. Mounting bracket; 31. First roller; 32. Hinge seat; 33. Guide seat; 34. First elastic element; 41. Clamping component; 42. First slider; 43. First cylinder; 44. Second slider; 45. Connecting rod; 46. Mounting shaft;

[0031] The purpose, features, and advantages of this application will be further explained in conjunction with the embodiments and with reference to the accompanying drawings. Detailed Implementation

[0032] The solutions in the embodiments of this application will be clearly and completely described below with reference to the accompanying drawings. Obviously, the described embodiments are only a part of the embodiments in this application, and not all of the embodiments. Based on the embodiments in this application, all other embodiments obtained by those of ordinary skill in the art without creative effort are within the scope of protection of this application.

[0033] It should be noted that all directional indicators, such as down, left, right, front, back, etc., in the embodiments of this application are only used to explain the relative positional relationship and movement of the components in a specific posture as shown in the attached figure. If the specific posture changes, the directional indicator will also change accordingly.

[0034] It should also be noted that when a component is described as "fixed to" or "set on" another component, it can be directly on the other component or there may be an intervening component present. When a component is described as "connected to" another component, it can be directly connected to the other component or there may be an intervening component present.

[0035] Furthermore, the descriptions involving "first," "second," etc., in the embodiments of this application are for descriptive purposes only and should not be construed as indicating or implying their relative importance or implicitly specifying the number of technical features indicated. Therefore, a feature defined as "first" or "second" may explicitly or implicitly include at least one of that feature. Additionally, the technical solutions of the various embodiments can be combined with each other, but this must be based on the ability of those skilled in the art to implement them. If the combination of technical solutions is contradictory or impossible to implement, it should be considered that such a combination of technical solutions does not exist and is not within the scope of protection claimed in this application.

[0036] This application discloses a tube clamping device, referring to... Figure 1 and Figure 2 The pipe clamping device includes: a drive mechanism 10, driven in a first direction; a mounting frame 20, located at the drive end of the drive mechanism 10; a buffer mechanism, including a first roller 31 disposed along one edge of the mounting frame 20, and a first elastic member 34 connecting the first roller 31 and the mounting frame 20, the elastic force of the first elastic member 34 causing the side of the roller to extend beyond the mounting frame, the side of the first roller 31 extending beyond the mounting frame to abut against the pipe; a clamping mechanism, including two clamping members 41 slidably disposed on the mounting frame, and a drive assembly for driving the two clamping members 41 to center and clamp; one end of the clamping member 41 extends beyond the mounting frame and is used to clamp the pipe; the clamping mechanism and the buffer mechanism are disposed on opposite sides of the mounting frame 20, and the drive mechanism 10 and the buffer mechanism are disposed on the same side of the mounting frame 20.

[0037] In this embodiment, the first roller 31 in the buffer mechanism can be used to support the pipe. It is elastically connected to the mounting frame 20 through the first elastic element 34. The radial runout generated when the pipe rotates can be buffered by the first elastic element 34, reducing the periodic impact on the entire device. At the same time, the two clamping parts 41 of the clamping mechanism can be driven by the drive assembly and clamp the other two sides of the pipe, playing an auxiliary limiting role. The clamping mechanism and the buffer mechanism are respectively located on both sides of the mounting frame 20, and the position arrangement is reasonable to avoid motion interference. At the same time, the drive mechanism 10 is set on the same side as the buffer mechanism, which can also avoid motion interference with the clamping mechanism. In addition, it can also ensure that the center of gravity of the components on both sides of the mounting frame 20 is relatively balanced, reducing the gravitational torque exerted on the drive mechanism 10 by the mounting frame 20 and the mechanism on it. This structural design makes the entire pipe clamping device more stable during operation, effectively reducing the vibration and impact caused by unreasonable component layout, improving the accuracy and quality of pipe processing, and also enhancing the service life and reliability of the device.

[0038] In some embodiments, the drive mechanism 10 includes: a frame 11, which is slidably connected to the mounting frame 20 along a first direction; a motor 12, which is disposed on the frame 11 and has its rotating shaft passing through the frame 11 and facing the mounting frame 20; a rack 13, which is disposed on the mounting frame 20 and is disposed along the first direction; and a gear, which is disposed on the rotating shaft and meshes with the rack 13.

[0039] In this embodiment, the frame 11 is used to mount the motor 12. The mounting frame 20 can be a T-shaped plate, which includes a horizontally arranged shoulder and a vertically arranged support. The buffer mechanism is located on the shoulder of the T-shaped plate, and the first roller 31 is arranged parallel to the shoulder and higher than the shoulder. In addition, the frame 11 and the buffer mechanism are arranged on the same side, and a first slide rail is arranged on the support along the vertical direction. The first slide rail is located below the first roller 31. In this embodiment, the first direction is the vertical direction. A matching sliding block is provided on the first slide rail, and the sliding block is also connected to the frame 11, thereby allowing the frame 11 and the mounting frame 20 to slide together. In this embodiment, two first slide rails can be arranged at intervals on the mounting part, and the rack 13 is arranged between the two first slide rails. The frame 11 can slide below the first roller 31 without motion interference. The clamping mechanism is arranged on the side of the mounting frame 20 away from the frame 11 and the buffer mechanism, making the layout more reasonable. Through the design of this drive mechanism 10, the mounting bracket 20 can be stably driven along the first direction, thereby driving the buffer mechanism and the clamping mechanism to move synchronously, meeting the processing requirements of pipes at different heights or positions, improving the adaptability and flexibility of the device, and ensuring the stability and accuracy of pipes during processing.

[0040] In some embodiments, the tube clamping device further includes a limiting member 14 disposed on the frame 11. The limiting member 14 can abut against one side of the first roller 31 to limit the relative sliding stroke between the frame 11 and the mounting frame 20. In this embodiment, the limiting member 14 may be a corner bracket disposed on the shoulder of the T-shaped plate and the lower end of the support portion. The frame 11 can slide between the two corner brackets. Of course, buffer pads or pneumatic dampers that contact the frame 11 can also be disposed on the two corner brackets to buffer the impact force when the mounting frame 20 moves. The corner bracket disposed on the shoulder may be disposed at one end of the first roller 31, and the corner bracket at the other end may be disposed at the end of the rack 13. The setting of the limiting member 14 effectively prevents the frame 11 from sliding beyond a predetermined range relative to the mounting frame 20, avoiding damage or failure of the device due to excessive sliding. At the same time, the application of buffer pads or pneumatic dampers can further reduce the impact, extend the service life of the device, and ensure the reliability and stability of the entire tube clamping device during operation.

[0041] In some embodiments, the buffer mechanism further includes: a hinge seat 32, disposed at both ends of the first roller 31 and rotatably connected to the first roller 31; a guide seat 33, disposed on the mounting frame 20, wherein the hinge seat 32 and the guide seat 33 are slidably connected, the sliding direction being along a first direction, and a first elastic element 34 is disposed between the hinge seat 32 and the guide seat 33. In this embodiment, the hinge seat 32 and the first roller 31 can be connected by a bearing, and the hinge seat 32 and the guide seat 33 can be connected by a guide rod. One end of the guide rod is disposed on the hinge seat 32, and the other end is disposed through the guide seat 33. A screw can also be disposed at the end of the guide rod, the screw head of which can prevent the guide rod from disengaging from the guide seat 33. In addition, the first elastic element 34 can be a spring sleeved on the outer periphery of the guide rod, with both ends abutting against the hinge seat 32 and the guide seat 33 respectively. This structure allows the first roller 31 to better adapt to the radial runout of the pipe when supporting it, through the sliding fit of the hinge seat 32 and the guide seat 33 and the buffering effect of the first elastic element 34, and to always maintain good contact with the pipe, ensuring the stability and reliability of the pipe during processing. At the same time, it effectively reduces the transmission of vibration to the mounting frame 20 and other components, improving the smooth operation and processing accuracy of the entire device.

[0042] In some embodiments, the clamping member 41 moves along the length of the first roller 31 during centering and clamping. The clamping mechanism further includes a first slider 42 slidably connected to the mounting frame 20. The clamping member 41 includes a second roller disposed on the first slider 42, and the second roller intersects with the first roller 31. In this embodiment, a mounting shaft 46 is provided on the upward-facing side of the first slider 42, and the second roller is sleeved on the mounting shaft 46, thereby allowing it to rotate relative to the mounting shaft 46. When the second roller clamps both sides of the tube, the tube can also move in a direction perpendicular to the first roller 31 and the second roller. This clamping mechanism is designed so that the second roller can slide along the first direction under the drive of the first slider 42, thereby achieving centering and clamping of the tube. At the same time, the rotation of the second roller itself can adapt to the rotation of the tube, ensuring the stability and reliability of the clamping process, effectively preventing the tube from shifting or shaking during processing, improving processing accuracy and quality, and allowing the tube to move in a direction perpendicular to the first roller 31 and the second roller, increasing the flexibility and applicability of the device and meeting the needs of different processing technologies for adjusting the position of the tube.

[0043] In some embodiments, the end of the second roller away from the mounting bracket is a clamping end, and the other end is a hinged end hinged to the first slider 42. The second roller can swing around the hinged end on the first slider 42. The clamping mechanism also includes a second elastic element connecting the first slider 42 and the second roller. The elastic force of the second elastic element causes the two clamping ends to swing inward to abut against the tube. In this embodiment, the hinged end can be one end of the mounting shaft 46 mounted on the first slider 42. The first slider 42 has a mounting groove for the mounting shaft 46 to swing, and the swing center is aligned with the length direction of the tube. Due to the limitation of the mounting groove, the swing angle of the mounting shaft 46 is kept within a certain range. The second elastic element can be a torsion spring disposed in the mounting groove. One end of the torsion spring abuts against the mounting shaft 46, and the other end abuts against the groove wall of the mounting groove, thereby allowing the second roller to swing within a certain angle to buffer the radial runout when the tube rotates. The aforementioned drive component can be an electric cylinder. Through the action of the second elastic element, the second roller can swing to a certain extent when the tube runs radially, thereby better adapting to the shape changes of the tube, reducing damage to the tube, improving the stability and reliability of clamping, further reducing the impact of vibration on the entire device, ensuring the smooth progress of the processing, and improving the overall performance and service life of the device.

[0044] In some embodiments, the drive assembly further includes a first cylinder 43 mounted on the mounting bracket 20, and a connecting rod 45 connecting the push rod of the first cylinder 43 and the first slider 42. The two connecting rods 45 are symmetrically arranged, and the driving direction of the first cylinder 43 is along a first direction. Specifically, the drive assembly also includes a second slider 44 slidably mounted on the mounting bracket 20. The sliding direction of the second slider 44 is along the first direction, and the first cylinder 43 is used to drive the second slider 44 to slide. One end of the two connecting rods 45 is rotatably hinged to the second slider 44, and the other end is correspondingly hinged to the two first sliders 42. In this embodiment, by setting two connecting rods 45, the first cylinder 43 can synchronously drive the two clamping members 41 to move synchronously, completing the clamping and release of the pipe. Of course, the setting of the first cylinder 43 can also give the second roller a certain buffer sliding space. When the thrust of the pipe jumping is too large, it can also overcome the thrust of the first cylinder 43, allowing the second roller to slide and avoiding rigid collision. The design of this drive assembly enables synchronous driving of the two clamping parts 41, ensuring the coordination and consistency of the clamping action, improving clamping efficiency and reliability. At the same time, the cooperation between the connecting rod 45 and the slider gives the clamping part 41 a certain buffering performance during the movement, effectively preventing rigid impact caused by the jump of the pipe, protecting the device and the pipe from damage, further enhancing the stability and durability of the device, and meeting the needs of long-term, high-intensity processing.

[0045] In some embodiments, the drive assembly further includes two second cylinders mounted on the mounting bracket 20. Each second cylinder corresponds to one of the first sliders 42. The second cylinders drive the two first sliders 42 to move towards each other for centering and clamping. In this embodiment, besides using a single cylinder to drive the two clamping members 41 to clamp the pipe, two second cylinders can also be used to drive the two clamping members 41 individually. The driving directions are simply opposite. Using two second cylinders to drive the two clamping members 41 separately allows for more precise control of the movement of each clamping member 41, achieving more flexible centering and clamping operations. This is particularly suitable for processing applications requiring high precision in pipe shape and size. Adjustments can be made individually according to the actual shape and size of the pipe to ensure clamping accuracy and reliability, while also improving the uniformity of clamping force, further enhancing the quality and stability of pipe processing, and providing more reliable clamping guarantees for different types of pipe processing.

[0046] It is worth noting that the aforementioned pipe clamping device allows the first roller 31 to support the pipe from bottom to top. The drive mechanism 10 drives the first roller 31 to rise and fall to adapt to pipes of different diameters, achieving floating support. In this case, the second roller clamps the left and right sides of the pipe, with the first direction being vertical. This floating support method automatically adapts to changes in pipe diameter, eliminating the need for frequent manual adjustments, greatly improving the device's versatility and ease of operation. It is suitable for processing various pipe specifications, effectively reducing production and time costs. Alternatively, the second roller can clamp the upper and lower sides of the pipe separately, thus serving not only as a clamp but also as a support. In this case, the drive mechanism 10 drives the first roller 31 to move radially closer to or away from the pipe. During unloading, the drive mechanism 10 drives the first roller 31 and the second roller away from the pipe, providing a clearance function and facilitating loading and unloading. In this case, the first direction is horizontal. This flexible clamping and support method provides more options and convenience for pipe processing, and can be flexibly adjusted according to different processing technology and requirements, improving the applicability and working efficiency of the device and meeting diverse production needs.

[0047] This application also proposes a laser tube cutting device, including the aforementioned tube clamping device, and further comprising a laser cutting module for cutting tubes. In this embodiment, the laser cutting module may include a cutting head and a robotic arm that drives the cutting head to move. The robotic arm drives the cutting head close to the tube and moves the cutting head along a certain cutting path to complete the set cutting task. This laser tube cutting device, combined with an advanced tube clamping device, can achieve stable clamping and flexible adjustment of the tube, providing a good foundation for laser cutting, ensuring the stability and accuracy of the cutting process, improving cutting quality and efficiency, effectively meeting the needs of various tube cutting and processing, and is especially suitable for large-scale, high-precision tube processing and production, with broad market application prospects and practical production value.

[0048] In this embodiment, the working principle of the tube clamping device and the laser tube cutting equipment is as follows: The first roller 31 in the buffer mechanism can be used to support the tube. It is elastically connected to the mounting frame 20 through the first elastic element 34. The radial runout generated when the tube rotates can be buffered by the first elastic element 34, reducing the periodic impact on the entire device. At the same time, the two clamping parts 41 of the clamping mechanism can be driven by the drive assembly and clamp the other two sides of the tube, playing an auxiliary limiting role. The clamping mechanism and the buffer mechanism are respectively located on both sides of the mounting frame 20, and the position arrangement is reasonable to avoid motion interference. At the same time, the drive mechanism 10 is set on the same side as the buffer mechanism, which can also avoid motion interference with the clamping mechanism. In addition, it can also ensure that the center of gravity of the components on both sides of the mounting frame 20 is relatively balanced, reducing the gravitational torque exerted on the drive mechanism 10 by the mounting frame 20 and the mechanism on it. Through the rational layout and coordinated operation of its components, the entire device achieves stable clamping and effective buffering of the pipe, providing reliable protection for laser cutting and other processing processes. It effectively improves the quality and efficiency of pipe processing, reduces equipment failure rate and maintenance costs, and has significant technical advantages and economic benefits.

[0049] The above are only some or preferred embodiments of this application. Neither the text nor the drawings should limit the scope of protection of this application. All equivalent structural transformations made using the content of this application's specification and drawings under the overall concept of this application, or direct / indirect applications in other related technical fields, are included within the scope of protection of this application.

Claims

1. A pinch device, characterized in that, include: The drive mechanism is driven in a first direction; Mounting bracket, located at the drive end of the drive mechanism; The buffer mechanism includes a first roller disposed along one edge of the mounting frame, and a first elastic member connecting the first roller and the mounting frame. The elastic force of the first elastic member causes the side portion of the roller to extend beyond the mounting frame, and the side portion of the first roller extending beyond the mounting frame is used to abut against the pipe. The clamping mechanism includes two clamping members slidably disposed at the mounting bracket, and a driving assembly for driving the two clamping members to clamp in a centered manner; one end of each clamping member extends beyond the mounting bracket and is used to clamp the pipe. The clamping mechanism and the buffer mechanism are respectively located on both sides of the mounting frame, and the driving mechanism and the buffer mechanism are located on the same side of the mounting frame.

2. The pinch valve of claim 1, wherein, The drive mechanism includes: The frame is slidably connected to the mounting bracket along the first direction; The motor is mounted on the frame, and its shaft passes through the frame and is positioned toward the mounting bracket; A rack is disposed on the mounting bracket and is arranged along the first direction; A gear is mounted on the rotating shaft and meshes with the rack.

3. The pinch valve of claim 2, wherein, The clamping device further includes a limiting member disposed on the frame, the limiting member being able to abut against one side of the first roller to limit the relative sliding stroke between the frame and the mounting frame.

4. The pinch valve of claim 1, wherein, The buffer mechanism further includes: The hinge seats are located at both ends of the first roller and are rotatably connected to the first roller; A guide seat is provided on the mounting bracket, and the hinge seat is slidably connected to the guide seat. The sliding direction is along a first direction, and the first elastic element is provided between the hinge seat and the guide seat.

5. The pinch valve of claim 1, wherein, The direction of movement of the clamping member during centering and clamping is along the length direction of the first roller; the clamping mechanism further includes a first slider that is slidably connected to the mounting frame, and the clamping member includes a second roller disposed on the first slider, the second roller intersecting the first roller.

6. The pinch valve of claim 5, wherein, The second roller has a clamping end at one end away from the mounting bracket and a hinge end at the other end that is hinged to the first slider. The second roller can swing around the hinge end on the first slider. The clamping mechanism also includes a second elastic element that connects the first slider and the second roller. The elastic force of the second elastic element causes the two clamping ends to swing inward to hold the tube.

7. The pinch valve of claim 5, wherein, The drive assembly further includes a first cylinder disposed on the mounting bracket, and a connecting rod connecting the first cylinder and the first slider. The two connecting rods are symmetrically arranged, and the driving direction of the first cylinder is along a first direction.

8. The pinch valve of claim 7, wherein, The drive assembly further includes a second slider slidably disposed on the mounting bracket, the sliding direction of the second slider being along the first direction, and the first cylinder being used to drive the second slider to slide; one end of the two connecting rods is rotatably hinged to the second slider, and the other end is hinged to the two first sliders one-to-one.

9. The pinch valve of claim 8, wherein, The drive assembly also includes two second cylinders disposed on the mounting bracket. The second cylinders are arranged in a one-to-one correspondence with the first sliders. The second cylinders are used to drive the two first sliders to move toward each other for centering and clamping.

10. A laser tube cutting apparatus characterized by, The clamp device according to any one of claims 1-9, and a laser cutting module for cutting a pipe.

Images