A large-diameter hydraulic pipe wringer with anti-detachment function

Abstract

This application relates to a large-diameter hydraulic pipe wringing machine with anti-detachment feature, belonging to the field of pipe wringing machines. It includes a machine body, a pipe seat fixed to the machine body, a rotating disc rotatably sleeved on the outside of the pipe seat, an upper fastener, a lower fastener, a power drive device fixed to the machine body for driving the rotating disc, and an anti-detachment structure. Both the upper and lower fasteners have slots. The upper fastener includes a fastener body and a lever. A lever is fixed to the rotating disc. When the rotating disc rotates, the lever on the rotating disc pushes the upper fastener to unscrew the drill rod or casing. The anti-detachment structure includes a clamping body that can rotate circumferentially along the pipe seat, and the clamping body can also be vertically raised and lowered. A clamping groove is opened on one side of the clamping body in the horizontal direction, and the lever of the upper fastener can be engaged into the clamping groove. This application improves the anti-detachment stability of the upper fastener during the use of the pipe wringing machine, making the operation of the pipe wringing machine safer and more reliable.

Description

Technical Field

[0001] This application relates to the field of pipe wringing machines, and in particular to a large-diameter hydraulic pipe wringing machine with anti-detachment feature. Background Technology

[0002] In many engineering fields such as drilling and oil extraction, pipe screwing machines are crucial pieces of machinery. As engineering operations continue to develop towards large-scale and specialized operations, the role of pipe screwing machines is becoming increasingly critical. They can efficiently complete the screwing and unscrewing operations of drill pipes or casings, significantly improving construction efficiency while greatly reducing manual labor intensity. This strongly promotes the efficient implementation of related projects, making complex underground operations more convenient and efficient, and fostering the large-scale and specialized development of related engineering operations.

[0003] Traditional pipe screwing machines typically include a machine body, pipe seat, moving plate, and power drive unit. The power drive unit often uses a hydraulic system with a gear transmission mechanism. Power is provided by a hydraulic motor, which drives the moving plate through a series of gears, thereby achieving the screwing / unscrewing action of the drill pipe or casing. To increase the torque for unscrewing the first thread of the drill bit, some pipe screwing machines are equipped with an impact mechanism. This mechanism uses a hydraulic cylinder piston rod to drive a pawl to engage with a ratchet wheel, generating an impact. During the screwing / unscrewing operation, the upper and lower couplings are inserted into the locking joint of the drill pipe or casing. The upper coupling is pushed by a lever on the moving plate to complete the screwing operation.

[0004] However, during the use of existing pipe tightening machines, because the upper fastener is in a suspended state, when the push pin on the rotating disc drives the upper fastener to rotate, the upper fastener is prone to flying off due to improper installation, incomplete engagement between the upper fastener's slot and the locking joint of the drill rod or casing, or other unstable installation factors. This can lead to significant safety hazards, potentially causing injury to operators and affecting the normal progress of construction. Utility Model Content

[0005] In order to improve the anti-detachment stability of the upper fastener during the use of the pipe wringer and make the operation of the pipe wringer safer and more reliable, this application provides an anti-detachment large-diameter hydraulic pipe wringer.

[0006] This application provides a large-diameter hydraulic pipe tightening machine with anti-detachment feature, employing the following technical solution:

[0007] A large-diameter hydraulic pipe wringing machine with anti-detachment function includes a machine body, a pipe seat fixed on the machine body, a movable disc rotatably sleeved on the outside of the pipe seat, an upper fastener, a lower fastener, a power drive device fixed on the machine body for driving the movable disc to rotate, and an anti-detachment structure.

[0008] Both the upper and lower fasteners are provided with slots. The upper fastener includes a fastener body and a lever. A lever is fixed on the moving plate. When the moving plate rotates, the lever on the moving plate pushes the upper fastener to unscrew or loosen the drill rod or casing.

[0009] The anti-detachment structure includes a clamping body that can rotate circumferentially along the tube seat, and the clamping body can also be raised and lowered vertically. The clamping body has a clamping groove on one side along the horizontal direction, and the lever of the upper fastener can be engaged into the clamping groove.

[0010] By adopting the above technical solution, the slot of the lower fastener is used to insert into the drill rod or casing upper locking joint inside the inner hole of the pipe seat, and the slot of the upper fastener is used to insert into the drill rod or casing lower locking joint outside the pipe seat. When installing the upper fastener, first engage the lever of the upper fastener with the clamping groove of the clamping body. At the same time, the clamping body with the anti-disengagement structure can rotate circumferentially and rise vertically along the pipe seat, making it easy to adjust to a suitable position so that the slot of the upper fastener can be inserted into the drill rod or casing lower locking joint outside the pipe seat to complete the installation. When unscrewing the drill rod or casing with a pipe screwing machine, firstly, the power drive device drives the moving plate to rotate, and the moving plate... The upper pusher pushes the upper fastener, and then the upper and lower fasteners work together to loosen or unscrew the drill rod or casing. During the use of the pipe screwing machine, the anti-detachment structure prevents the upper fastener from flying off when the rotating disc rotates due to unstable installation, improving the anti-detachment stability of the upper fastener during the operation of the pipe screwing machine and reducing safety hazards. On the other hand, the upper fastener, after being fixed by the anti-detachment structure, can rotate circumferentially along the pipe seat and rise and fall vertically, making it easy to adjust to a suitable position so that the slot of the upper fastener can be inserted into the lower locking joint of the drill rod or casing outside the pipe seat, improving the installation efficiency of the upper fastener.

[0011] Optionally, a vertically arranged lifting adjustment rod is fixed below the clamping body, and a rotating support seat is sleeved on the outside of the lifting adjustment rod. The lifting adjustment rod can slide up and down vertically within the rotating support seat. A rotating block is fixed on the side of the rotating support seat near the outer wall of the tube seat, and a rotating groove is opened circumferentially on the outer wall of the tube seat to slide with the rotating block.

[0012] By adopting the above technical solution, the clamping body can rotate circumferentially along the pipe seat and rise and fall vertically. This makes the upper fastener, which is fixed by the clamping block, more flexible in position adjustment, allowing the slot opening of the upper fastener to be quickly adjusted to a suitable height and angle to match the position of the drill rod or casing lower locking joint on the outside of the pipe seat, thus improving the practicality and applicability of the anti-detachment structure.

[0013] Optionally, a friction plate is abutted against the outer side of the lifting adjustment rod, and a guide rod is fixed to the side of the friction plate away from the lifting adjustment rod. The guide rod is slidably connected to the rotating support seat, and a compression spring is sleeved on the outer side of the guide rod. The two ends of the compression spring abut against the inner wall of the rotating support seat and the friction plate, respectively. The compression spring is used to apply a force to the friction plate to move it closer to the lifting adjustment rod.

[0014] By adopting the above technical solution, after the upper fastener is fixed by the clamping block and adjusted to the appropriate height position, the compression spring applies force to the guide rod, causing the friction plate connected to the guide rod to move closer to the lifting adjustment rod and tightly abut against the outside of the lifting adjustment rod, generating friction to overcome the gravity of the upper fastener and clamping body and other anti-detachment structures. This allows the position of the lifting adjustment rod to stop at the corresponding position after the worker moves, and it will not automatically move down due to gravity, ensuring the stability of the upper fastener's height position adjustment and improving the convenience of the worker's operation.

[0015] Optionally, the friction plate has an annular structure, and its inner wall is in close contact with the outer wall of the lifting adjustment rod.

[0016] By adopting the above technical solution, the friction plate has a ring structure and its inner wall is closely fitted with the outer wall of the lifting adjustment rod, which can generate a larger contact area with the outer side of the lifting adjustment rod, enhance the friction between the friction plate and the lifting adjustment rod, and improve the stability and safety of the upper buckle body during the pipe tightening operation.

[0017] Optionally, a telescopic rod is fixed to the side of the clamping body near the buckle body, and an anti-detachment plate is fixed to the end of the telescopic rod away from the clamping body. The lever is provided with a bending part, and an anti-detachment spring is sleeved on the outside of the telescopic rod. The anti-detachment spring is used to push the anti-detachment plate against the bending part of the lever of the buckle body.

[0018] By adopting the above technical solution, the elastic force generated by the anti-detachment spring acts on the anti-detachment plate, pushing the anti-detachment plate to move towards the bent part of the buckle body and abut against it. This applies a force to the slot of the buckle body, which is inserted into the lower locking joint of the drill rod or casing outside the pipe seat. This makes the buckle body more tightly connected to the lower locking joint of the drill rod or casing when the upper buckle is tightened or loosened, and the two are not easy to separate. This further enhances the stability and reliability of the upper buckle during operation.

[0019] Optionally, a baffle is provided at the opening of the clamping groove, and a plug-in groove is provided at the top of the clamping body. The plug-in groove is connected to the clamping groove, and the baffle is inserted into the plug-in groove from top to bottom.

[0020] By adopting the above technical solution, after the lever of the upper buckle is inserted into the clamping groove, the baffle is inserted into the insertion groove from top to bottom, so that the baffle closes the opening of the clamping groove, thereby preventing the lever of the upper buckle from coming out of the clamping groove, improving the stability of the upper buckle during the working process, and the operation of fixing the lever of the upper buckle is simple and convenient.

[0021] Optionally, a magnet is provided at the bottom of the baffle, and the magnet is attracted and fixed to the clamping body.

[0022] By adopting the above technical solution, after the baffle with magnet is inserted into the insertion slot from top to bottom, the magnet is attracted and fixed to the clamping body. Thus, even if the equipment vibrates, the attraction of the magnet makes it difficult for the baffle to detach from the insertion slot, further ensuring the stability of the upper fastener.

[0023] In summary, this application includes at least one of the following beneficial technical effects:

[0024] 1. During the use of the pipe screwing machine, the anti-detachment structure prevents the upper fastener from flying off when the rotating disc rotates due to unstable installation, thus improving the anti-detachment stability of the upper fastener during the operation of the pipe screwing machine and reducing safety hazards. On the other hand, the upper fastener, after being fixed by the clamping body in the anti-detachment structure, can rotate circumferentially and rise vertically along the pipe seat, making the position adjustment of the upper fastener after being fixed by the clamping block more flexible. Thus, the slot opening of the upper fastener can be quickly adjusted to a suitable height and angle to match the position of the drill rod or casing lower locking joint on the outside of the pipe seat, improving the practicality and applicability of the anti-detachment structure.

[0025] 2. After the upper fastener is fixed by the clamping block and adjusted to the appropriate height, the compression spring applies force to the guide rod, causing the friction plate connected to the guide rod to move closer to the lifting adjustment rod and press tightly against the outside of the lifting adjustment rod. This generates friction to overcome the weight of the upper fastener and the clamping body and other anti-detachment structures, so that the position of the lifting adjustment rod can stop at the corresponding position after the worker moves, and will not automatically move down due to gravity. This ensures the stability of the height adjustment of the upper fastener and improves the convenience of the worker's operation.

[0026] 3. The elastic force generated by the anti-detachment spring acts on the anti-detachment plate, pushing the anti-detachment plate to move towards the bent part of the buckle body and abut against it. This applies a force to the slot of the buckle body, which is inserted into the lower locking joint of the drill rod or casing outside the pipe seat. This makes the buckle body and the lower locking joint of the drill rod or casing more tightly connected when the upper buckle is tightened or loosened during the operation of the drill rod or casing. The two are not easy to separate, thereby further enhancing the stability and reliability of the upper buckle during the working process. Attached Figure Description

[0027] Figure 1 This is a schematic diagram of the anti-detachment large-diameter hydraulic pipe wringer in this application;

[0028] Figure 2 This is a schematic diagram showing the anti-detachment structure;

[0029] Figure 3 This is a partial structural diagram showing the anti-detachment structure;

[0030] Figure 4 This is an internal sectional view of the rotating support.

[0031] Figure 5 It means Figure 4 A partial sectional view at point AA.

[0032] Explanation of reference numerals in the attached drawings: 1. Body; 2. Tube seat; 21. Rotating groove; 3. Moving plate; 4. Upper fastener; 41. Fastener body; 42. Lever; 43. Lever post; 44. Bending part; 5. Power drive device; 51. Hydraulic motor; 52. Hydraulic valve; 6. Impact mechanism; 61. Impact hydraulic cylinder; 62. Ratchet device; 7. Slot; 8. Clamping body; 81. Clamping groove; 82. Baffle; 83. Lifting adjustment rod; 84. Rotating support seat; 85. Rotating block; 86. Ball bearing; 87. Friction plate; 88. Guide rod; 89. Compression spring; 9. Telescopic rod; 91. Anti-detachment plate; 92. Anti-detachment spring. Detailed Implementation

[0033] The following is in conjunction with the appendix Figures 1-5 This application will be described in further detail.

[0034] This application discloses a hydraulic pipe-tightening machine with anti-detachment feature for large-diameter pipes. (Refer to...) Figure 1 and Figure 2 The anti-detachment large-diameter hydraulic pipe tightening machine includes a body 1, a pipe seat 2, a moving disc 3, an upper fastener 4, a lower fastener, a power drive device 5, an impact mechanism 6, and an anti-detachment structure. The pipe seat 2 is fixed to the body 1, and the moving disc 3 is rotatably sleeved on the outside of the pipe seat 2. The power drive device 5 is fixed to the body 1 to drive the moving disc 3 to rotate. Both the upper and lower fasteners have slots 7. The slot 7 of the lower fastener is used to insert into the drill rod or casing locking joint inside the inner hole of the pipe seat 2, and the slot 7 of the upper fastener 4 is used to insert into the drill rod or casing lower locking joint outside the pipe seat 2. The upper fastener 4 includes a fastener body 41 and a lever 42. A lever 43 is fixed on the moving disc 3. When the moving disc 3 rotates, the lever 43 pushes the upper fastener 4 to tighten or loosen the drill rod or casing. The impact mechanism 6 is fixed to the body 1 to increase the torque for unscrewing the first thread of the drill bit.

[0035] Reference Figure 2 and Figure 3The anti-detachment structure includes a clamping body 8 that can rotate circumferentially along the tube seat 2, and the clamping body 8 can also be raised and lowered vertically. A clamping groove 81 is provided on one side of the clamping body 8 in the horizontal direction, and the lever 42 of the upper buckle 41 can be engaged into the clamping groove 81. A baffle 82 is provided at the opening of the clamping groove 81, and a insertion / removal groove is provided at the top of the clamping body 8, communicating with the clamping groove 81. The baffle 82 is inserted into the insertion / removal groove from top to bottom, thereby sealing the opening of the clamping groove 81 and preventing the lever 42 of the upper buckle 41 from detaching from the clamping groove 81, thus improving the stability of the upper buckle 41 during operation. A magnet is provided at the bottom of the baffle 82, and the magnet is attracted and fixed to the clamping body 8. The equipment operation generates a large amount of vibration; due to the attraction of the magnet, the baffle 82 is not easily detached from the insertion / removal groove. If it is necessary to disassemble the upper buckle 4, simply pull out the baffle 82.

[0036] When installing the upper fastener 4, first engage the lever 42 of the upper fastener 4 with the clamping groove 81 of the clamping body 8. At the same time, the clamping body 8 with the anti-detachment structure can rotate circumferentially and rise vertically along the pipe seat 2, making it easy to adjust to a suitable position. This allows the slot 7 of the upper fastener 4 to be inserted into the drill rod or casing lower locking joint on the outside of the pipe seat 2 to complete the installation. The upper fastener 4, after being fixed by the anti-detachment structure, can rotate circumferentially and rise vertically along the pipe seat 2, making it easy to adjust to a suitable position. This allows the slot 7 of the upper fastener 4 to be inserted into the drill rod or casing lower locking joint on the outside of the pipe seat 2, improving the installation efficiency of the upper fastener 4.

[0037] When unscrewing drill rods or casings using a pipe screwing machine, the power drive unit 5 first drives the rotating disc 3 to rotate. The push pin 43 on the rotating disc 3 pushes the upper fastener 4. Then, the upper fastener 4 and the lower fastener cooperate to unscrew or detach the drill rod or casing. During use, the anti-detachment structure prevents the upper fastener 4 from flying off when the rotating disc 3 rotates due to unstable installation, improving the anti-detachment stability of the upper fastener 4 during the operation of the pipe screwing machine and reducing safety hazards.

[0038] Specifically, refer to Figure 1 The power drive unit 5 includes a hydraulic motor 51, a hydraulic valve 52, and a gear transmission mechanism fixed to the body 1. The hydraulic motor 51 is the power source, driven by a high-performance hydraulic pump, and features high output torque and a wide speed range. The hydraulic valve 52 controls the flow direction and pressure of the hydraulic oil; it can be a directional valve or a relief valve. The directional valve changes the flow direction of the hydraulic oil, thereby controlling the forward and reverse rotation of the hydraulic motor 51. The gear transmission mechanism includes a motor gear, an intermediate gear, and a large gear. The motor gear is connected to the output shaft of the hydraulic motor 51. When the hydraulic motor 51 operates, it drives the motor gear to rotate. The intermediate gear transmits power and changes the speed ratio; it meshes with the motor gear and the large gear. The large gear is fixedly connected to the moving plate 3, transmitting the power of the hydraulic motor 51 to the moving plate 3 through gear transmission, causing the moving plate 3 to rotate.

[0039] Reference Figure 1 The impact mechanism 6 consists of an impact hydraulic cylinder 61 and a ratchet device 62. The ratchet is fixedly sleeved on the outside of the moving plate 3. The piston rod of the impact hydraulic cylinder 61 is connected to the pawl seat. When pressure oil enters the rodless chamber of the impact hydraulic cylinder 61, the piston rod of the hydraulic cylinder drives the pawl to move forward and engage with the ratchet on the moving plate 3 to generate an impact, increasing the torque for unscrewing the first thread of the drill bit.

[0040] Reference Figure 2 and Figure 3 A vertically oriented lifting adjustment rod 83 is fixed below the clamping body 8. A rotating support seat 84 is sleeved on the outside of the lifting adjustment rod 83, allowing the lifting adjustment rod 83 to slide vertically up and down within the rotating support seat 84. A rotating block 85 is fixed to the side of the rotating support seat 84 near the outer wall of the tube seat 2. A rotating groove 21 is circumferentially formed on the outer wall of the tube seat 2, which slides with the rotating block 85. A ball bearing 86 is embedded in the rotating block 85, which reduces the friction between the rotating block 85 and the rotating groove 21, making the rotation smoother.

[0041] Reference Figure 4 and Figure 5 A friction plate 87 abuts against the outer side of the lifting adjustment rod 83. A guide rod 88 is fixed to the side of the friction plate 87 away from the lifting adjustment rod 83. The guide rod 88 is slidably connected inside the rotating support seat 84. A compression spring 89 is sleeved on the outer side of the guide rod 88. The two ends of the compression spring 89 abut against the inner wall of the rotating support seat 84 and the friction plate 87, respectively. The compression spring 89 is used to apply a force to the friction plate 87 to move it closer to the lifting adjustment rod 83. The friction plate 87 has a ring structure, and its inner wall is tightly fitted with the outer wall of the lifting adjustment rod 83.

[0042] When the user moves the lifting adjustment rod 83 to a certain position, the compression spring 89 applies force to the guide rod 88, causing the friction plate 87 connected to the guide rod 88 to move closer to the lifting adjustment rod 83 and press tightly against the outside of the lifting adjustment rod 83, generating friction to overcome the gravity of the upper buckle body 41 and the clamping body 8 and other anti-detachment structures, so that the position of the lifting adjustment rod 83 can stop at the corresponding position after the staff moves, and will not automatically move down due to gravity, ensuring the stability of the height position adjustment of the upper buckle body 41.

[0043] Reference Figure 3 A telescopic rod 9 is fixed on the side of the clamping body 8 near the buckle body 41. An anti-detachment plate 91 is fixed on the end of the telescopic rod 9 away from the clamping body 8. A bending part 44 is provided on the lever 42. An anti-detachment spring 92 is sleeved on the outside of the telescopic rod 9. The anti-detachment spring 92 is used to push the anti-detachment plate 91 against the bending part 44 of the lever 42 of the buckle body 41.

[0044] When the slot 7 of the buckle body 41 is inserted into the drill rod or casing lower locking joint outside the pipe seat 2, the elastic force of the anti-disengagement spring 92 causes the anti-disengagement plate 91 to press tightly against the bent part 44 of the lever 42, applying a force to the slot 7 of the buckle body 41 to insert into the drill rod or casing lower locking joint, making it difficult for the two to separate during the buckling.

[0045] The implementation principle of the anti-detachment large-diameter hydraulic pipe screwing machine in this application embodiment is as follows: the slot 7 of the lower fastener is used to insert into the drill rod or sleeve locking joint in the inner hole of the pipe seat 2, and the slot 7 of the upper fastener 4 is used to insert into the drill rod or sleeve lower locking joint on the outside of the pipe seat 2. When installing the upper fastener 4, firstly, the lever 42 of the upper fastener 4 is engaged with the clamping groove 81 of the clamping body 8. At the same time, the clamping body 8 of the anti-detachment structure can rotate circumferentially and rise vertically along the pipe seat 2, making it easy to adjust to a suitable position so that the slot 7 of the upper fastener 4 is inserted into the drill rod or sleeve lower locking joint on the outside of the pipe seat 2 to complete the installation; when screwing or unscrewing the drill rod or sleeve by the pipe screwing machine, firstly, the power drive device 5 The drive plate 3 rotates, and the push pin 43 on the drive plate 3 pushes the upper fastener 4. Then, the upper fastener 4 and the lower fastener cooperate to realize the screwing and unscrewing of the drill rod or casing. During the use of the pipe screwing machine, the anti-detachment structure prevents the upper fastener 4 from flying off when the drive plate 3 rotates due to unstable installation, improves the anti-detachment stability of the upper fastener 4 during the operation of the pipe screwing machine, and reduces safety hazards. On the other hand, the upper fastener 4, after being fixed by the anti-detachment structure, can rotate circumferentially and rise and fall vertically along the pipe seat 2, making it easy to adjust to a suitable position so that the slot 7 of the upper fastener 4 can be inserted into the lower locking joint of the drill rod or casing outside the pipe seat 2, improving the installation efficiency of the upper fastener 4.

[0046] The above are all preferred embodiments of this application, and are not intended to limit the scope of protection of this application. Therefore, all equivalent changes made in accordance with the structure, shape and principle of this application should be covered within the scope of protection of this application.

Claims

1. A large-diameter hydraulic pipe tightening machine with anti-detachment feature, characterized in that, It includes a body (1), a tube seat (2) fixed on the body (1), a rotating disc (3) rotatably sleeved on the outside of the tube seat (2), an upper fastener (4), a lower fastener, a power drive device (5) fixed on the body (1) for driving the rotating disc (3) to rotate, and an anti-detachment structure; Both the upper fastener (4) and the lower fastener are provided with slots (7). The upper fastener (4) includes a fastener body (41) and a lever (42). A lever (43) is fixed on the moving plate (3). When the moving plate (3) rotates, the lever (43) on the moving plate (3) pushes the upper fastener (4) to unscrew the drill rod or casing. The anti-detachment structure includes a clamping body (8) that can rotate circumferentially along the tube seat (2), and the clamping body (8) can also be raised and lowered vertically. The clamping body (8) has a clamping groove (81) on one side in the horizontal direction, and the lever (42) of the upper fastener (4) can be engaged into the clamping groove (81).

2. The anti-detachment large-diameter hydraulic pipe tightening machine according to claim 1, characterized in that, A vertically arranged lifting adjustment rod (83) is fixed below the clamping body (8). A rotating support seat (84) is sleeved on the outside of the lifting adjustment rod (83). The lifting adjustment rod (83) can slide up and down vertically within the rotating support seat (84). A rotating block (85) is fixed on the side of the rotating support seat (84) near the outer wall of the tube seat (2). A rotating groove (21) is opened circumferentially on the outer wall of the tube seat (2) to slide with the rotating block (85).

3. The anti-detachment large-diameter hydraulic pipe tightening machine according to claim 2, characterized in that, The outer side of the lifting adjustment rod (83) abuts against a friction plate (87). A guide rod (88) is fixed on the side of the friction plate (87) away from the lifting adjustment rod (83). The guide rod (88) is slidably connected inside the rotating support seat (84). A compression spring (89) is sleeved on the outer side of the guide rod (88). The two ends of the compression spring (89) abut against the inner wall of the rotating support seat (84) and the friction plate (87) respectively. The compression spring (89) is used to apply a force to the friction plate (87) to move it closer to the lifting adjustment rod (83).

4. The anti-detachment large-diameter hydraulic pipe tightening machine according to claim 3, characterized in that, The friction plate (87) has an annular structure, and its inner wall is in close contact with the outer wall of the lifting adjustment rod (83).

5. The anti-detachment large-diameter hydraulic pipe tightening machine according to claim 1, characterized in that, The clamping body (8) has a telescopic rod (9) fixed on the side near the buckle body (41). The end of the telescopic rod (9) away from the clamping body (8) is fixed with an anti-detachment plate (91). The lever (42) has a bent part (44). An anti-detachment spring (92) is sleeved on the outside of the telescopic rod (9). The anti-detachment spring (92) is used to push the anti-detachment plate (91) against the bent part (44) of the lever (42) of the buckle body (41).

6. The anti-detachment large-diameter hydraulic pipe tightening machine according to claim 1, characterized in that, The opening of the clamping groove (81) is provided with a baffle (82), and the top of the clamping body (8) is provided with a plug-in groove. The plug-in groove is connected to the clamping groove (81), and the baffle (82) is inserted into the plug-in groove from top to bottom.

7. A large-diameter hydraulic pipe-tightening machine for preventing pipe detachment according to claim 6, characterized in that, The bottom of the baffle (82) is provided with a magnet, which is attracted and fixed to the clamp (8).

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