A guided power elevator and tubing elevator

Abstract

The present application belongs to the technical field of petroleum workover equipment, and particularly relates to a guide type power elevator and a tubing lifting device. The power elevator comprises an elevator body, a spreader plate is fixed to the middle part of the rear side of the elevator body, a fixing hole is formed in the spreader plate, a hydraulic motor is fixed in the fixing hole, the output end of the hydraulic motor penetrates through the fixing hole and is rotationally connected with a guide gear, the guide gear is meshingly connected with a guide rack, the guide rack is rotationally movably connected with the hydraulic motor through the guide gear, and the bottom of the guide rack is fixedly connected with a guide body, the guide body is wedged in the bottom of the elevator body and is movably guided with the elevator body through the guide rack, the guide gear and the hydraulic motor. The present application solves the problems caused by manually dragging the elevator body or increasing a complex mechanism on the traveling block hook to avoid the tubing coupling, ensures the effectiveness and safety of the power elevator to avoid the tubing coupling, and realizes the automation and unmanned operation of the workover operation.

Description

Technical Field

[0001] This invention belongs to the technical field of oil well workover equipment, specifically relating to a guide-type power lifting clamp and tubing lifting device. Background Technology

[0002] In oil well workover, locked-ring power clamps are mostly used for lifting and lowering tubing. Traditional locked-ring power clamps are mostly manually operated, which cannot meet the requirements of modern intelligent well workover operations. Furthermore, their locking effect is poor, their size is bulky, and they are prone to causing safety accidents. While intelligently controlled locked-ring power clamps are now used, meeting the requirements of modern intelligent well workover operations, these power clamps cannot guarantee the stability of their connection and installation, resulting in poor safety and convenience of well workover operations.

[0003] Existing technologies, such as patent application CN217950295U (a novel type of lock-ring power jack), address the issue of unstable connection and installation of intelligently controlled lock-ring power jacks. This approach utilizes a lever as an intermediate connector and a detachable connection between the lever and the lock-ring to improve the stability of the lock-ring power jack connection and installation. This solves the problem of poor safety and convenience of intelligently controlled lock-ring power jacks during well workover operations. However, existing lock-ring power jacks can only perform lifting or lowering operations. When encountering tubing couplings during lifting or lowering, manual dragging or adding complex mechanisms to the traveling block hook is still required to avoid the tubing couplings. Current technology struggles to balance the effectiveness and safety of manually dragging the power jack to avoid tubing couplings, making automated well workover operations difficult when no one is at the wellhead. Therefore, a new technical solution is needed to address these technical problems. Summary of the Invention

[0004] The purpose of this invention is to provide a guide-type power jack and tubing lifting device to solve the problems mentioned in the background art. When the current closed-loop power jack encounters tubing couplings during the lifting or lowering process, it still requires manual dragging or the addition of complex mechanisms to the traveling block hook to avoid the tubing couplings. The existing technology currently cannot balance the effectiveness and safety of manually dragging the power jack or adding complex mechanisms to the traveling block hook to avoid the tubing couplings, and it is difficult to achieve unmanned automated well workover operations at the wellhead.

[0005] To achieve the above objectives, the present invention provides the following technical solution: a guide-type power lifting clamp, comprising a lifting clamp body, an extension plate fixed to the rear center of the lifting clamp body, a fixing hole provided on the extension plate and a hydraulic motor fixed through the fixing hole, the output end of the hydraulic motor passing through the fixing hole and rotatably connected to a guide gear, the guide gear meshing with a guide rack, the guide rack being rotatably movably connected to the hydraulic motor through the guide gear and a guide body fixedly connected to its bottom, the guide body wedge into the bottom of the lifting clamp body and being movably guided by the meshing guide rack, guide gear, and hydraulic motor to the lifting clamp body.

[0006] Furthermore, an arc-shaped cover is provided on the rear side of the guide body, a support frame is fixed on the arc-shaped cover and fixedly connected to the guide rack through the support frame, the guide rack is fixed to the top side of the support frame, and a guide seat is provided on the front side of the arc-shaped cover to engage with the hanging clamp body, the guide seat is located on the front side of the guide body.

[0007] Furthermore, the guide seat includes a U-shaped bayonet and a guide seat. The guide seat is disposed on both sides of the U-shaped bayonet. The U-shaped bayonet is disposed directly below the oil pipe port of the lifting clamp body and is configured to cooperate with the oil pipe port. Each guide seat has a groove on its outer side and is wedged into the inner side of the guide limiting seat on the front side of the lifting clamp body through the groove. The guide limiting seat is wedged and moved to the guide seat through a meshing guide rack and guide gear and a hydraulic motor. One of the guide seats is fixed with a connecting pin and a lever gear is hinged to it through the connecting pin. The side of the lever gear is meshed with a lever rack fixed to the inner side wall of the guide limiting seat.

[0008] Furthermore, a positioning pin is fixed on the lever gear, and a lever is hinged to it through the positioning pin and the connecting pin. One end of the lever is movably mounted on the upper part of one of the guide seats through meshing connections of the lever gear and lever rack, meshing connections of the guide rack and guide gear, and a hydraulic motor. The other end of the lever is movably attached to the upper inner side of the other guide seat and simultaneously engaged with the U-shaped bayonet.

[0009] Furthermore, the top of the hanging clamp body is supported and fixed with a fixing plate parallel to the extension plate. The front center of the fixing plate has a pipe opening located directly above the oil pipe opening. An inner liner fixed to the top of the oil pipe opening is embedded in the pipe opening. A locking ring embedded in the pipe opening is fitted on the upper part of the inner liner. Several teeth are evenly distributed around the edge of the locking ring and are connected to a drive gear through meshing with the teeth. The drive gear is embedded in the rear edge of the fixing plate and is rotatably connected to an inverted opening and closing motor fixed to the bottom of the rear edge of the fixing plate. The opening and closing motor is rotatably connected to the locking ring through the meshing drive gear and teeth. The locking ring is set to open and close with the pipe opening through the meshing drive gear, teeth, and opening and closing motor. The main body of the opening and closing motor and the main body of the hydraulic motor are arranged side by side between the fixing plate and the extension plate.

[0010] In addition to the above technical solutions, there are also oil pipe lifting equipment with this guide-type power lifting clamp.

[0011] Compared with the prior art, the beneficial effects of the present invention are:

[0012] 1. This invention utilizes the guiding action of a guide rack to enable the hydraulic motor to move as the guide gear rotates along the guide rack. This allows the lifting clamp body to move along with the hydraulic motor to the upper part of the guide body. Furthermore, the wedge-shaped moving guide design between the guide body and the lifting clamp body allows the lifting clamp body to avoid the tubing coupling under the combined action of the hydraulic motor and the guide body. This eliminates the need for manual dragging or adding complex mechanisms to the traveling block hook, effectively solving the problems associated with manually dragging the lifting clamp body or adding complex mechanisms to the traveling block hook to avoid the tubing coupling. This ensures the effectiveness and safety of the lifting clamp body avoiding the tubing coupling, while also effectively preventing damage caused by manual dragging of the lifting clamp body and impact with the tubing coupling. This significantly extends the service life of the lifting clamp body, enabling unmanned operation of this power lifting clamp and achieving automated well workover operations without human intervention, thus ensuring the safety of oil well workover operations.

[0013] 2. The invention employs an arc-shaped cover design, which effectively avoids the tubing coupling when the lifting clamp body is lifted or lowered, thus significantly improving the stability and safety of the power lifting clamp during lowering. Through the wedge-shaped movable connection between the guide seat and the guide limit seat, the lifting clamp body can only move back and forth under the guidance of the guide body. This ensures that the lifting clamp body completely avoids the tubing coupling when lifted or lowered, effectively preventing damage to the lifting clamp body and tubing caused by impact with the tubing coupling. This greatly extends the service life of the lifting clamp body, enabling the power lifting clamp to operate unmanned, achieving automated well workover operations without human intervention and ensuring the safety of oil well workover operations.

[0014] 3. This invention utilizes the guiding effect of the lever rack to cause the lever gear to rotate back and forth along the lever rack direction under the movement of the hydraulic motor, thereby driving the lever to move. This allows the oil pipe that has not fully entered the oil pipe port of the lifting clamp body to quickly and smoothly enter the oil pipe port under the action of the lever, effectively avoiding the problem of the locking ring failing to close due to the oil pipe not fully entering the oil pipe port. At the same time, it also solves the problem of the oil pipe being hit due to the locking ring failing to close, effectively improving the effect and efficiency of the locking ring closing, and ensuring the safety of lifting or lowering the lifting clamp body.

[0015] 4. This invention utilizes the meshing action of the locking teeth and the drive gear to enable the locking ring to automatically open and close under the drive of the opening and closing motor. This forces the tubing to achieve intelligent control of well workover operations under the automatic opening and closing of the locking ring, effectively improving the efficiency of oil well workover operations and ensuring intelligent control of oil well workover operations. Attached Figure Description

[0016] Figure 1 This is a front view of the overall structure of the present invention;

[0017] Figure 2 This is a schematic diagram of the overall structure of the present invention from the rear.

[0018] Figure 3 for Figure 2 Structural diagram of the middle lifting clamp body (excluding the inner liner, locking ring, drive gear and opening / closing motor);

[0019] Figure 4 for Figure 2 A schematic diagram of the front structure of the central guide body (including guide rack, guide gear and hydraulic motor).

[0020] Figure 5 for Figure 4 A schematic diagram of the center lever in the locked position;

[0021] Figure 6 for Figure 5 A schematic diagram of the rack and pinion mechanism in a fixed state;

[0022] Figure 7 This is a schematic diagram of the structure of the lifting clamp body of the present invention, which includes an inner liner, a locking ring, a drive gear, and an opening and closing motor.

[0023] Figure 8 for Figure 7 Schematic diagram of the exploded assembly structure;

[0024] Figure 9 This is a schematic diagram of the structure of the lifting power clamp of the present invention to avoid the oil pipe coupling process;

[0025] Figure 10This is a schematic diagram of the structure of the present invention for the process of lowering the power lifting clamp to avoid the oil pipe coupling.

[0026] The components include: 1. Hanger body; 101. Oil pipe port; 102. Oil pipe; 103. Guide limit seat; 2. Extension plate; 3. Fixing hole; 4. Hydraulic motor; 5. Guide gear; 6. Guide rack; 7. Guide body; 8. Fixing plate; 9. Pipe port; 10. Inner liner; 11. Locking ring; 12. Clamping tooth; 13. Drive gear; 14. Opening and closing motor; 15. Arc cover; 16. Support frame; 17. Guide seat; 171. U-shaped bayonet; 172. Guide seat; 1721. Groove; 18. Connecting pin; 19. Lever gear; 20. Lever rack; 21. Positioning pin; 22. Lever; 23. Upper guide angle. Detailed Implementation

[0027] The following examples are used to further illustrate the content of the present invention and do not limit the application of the present invention. Example 1:

[0028] Please see Figures 1-10 A guide-type power lifting clamp includes a lifting clamp body 1 for lifting oil pipe 102. An extension plate 2 for fixing a hydraulic motor 4 is fixed to the middle of the rear side of the lifting clamp body 1. The extension plate 2 has a fixing hole 3 for installing the hydraulic motor 4. The hydraulic motor 4 for driving the lifting clamp body 1 is fixed through the fixing hole 3. The output end of the hydraulic motor 4 passes through the fixing hole 3 and is rotatably connected to a guide gear 5 for guiding the movement of the hydraulic motor 4. The guide gear 5 is meshed with a guide rack 6 for controlling the movement direction of the hydraulic motor 4. The guide rack 6 is rotatably connected to the hydraulic motor 4 through the guide gear 5. A guide body 7 for guiding the lifting clamp body 1 to avoid the oil pipe coupling is fixedly connected to its bottom. The guide body 7 is wedge-fitted to the bottom of the lifting clamp body 1 and is movably guided to the lifting clamp body 1 through the meshing guide rack 6, guide gear 5, and hydraulic motor 4.

[0029] Please see Figures 1-3 and Figures 7-8The top of the hanging clamp body 1 is fixed with a fixing plate 8 for fixing the opening and closing motor 14. The fixing plate 8 and the extension plate 2 are arranged parallel to each other vertically. The front center of the fixing plate 8 has a pipe opening 9 located directly above the oil pipe opening 101 of the hanging clamp body 1 and used to engage the oil pipe opening 101 to lock the oil pipe 102. An inner liner 10 is embedded in the pipe opening 9 and fixed to the top of the oil pipe opening 101 for fixing the locking ring 11. The upper part of the inner liner 10 is fitted with a locking ring 11 embedded in the pipe opening 9 for locking the oil pipe 102. Several locking teeth for the locking ring 11 to rotate are evenly distributed around the edge of the locking ring 11. 12 is connected to a drive gear 13 for rotating the locking ring 11 by meshing with the snap 12. The drive gear 13 is embedded in the rear edge of the fixed plate 8 and is rotatably connected to an inverted motor 14 fixed at the bottom of the rear edge of the fixed plate 8 for driving the locking ring 11 to open and close. The motor 14 is rotatably connected to the locking ring 11 by meshing with the drive gear 13 and snap 12. The locking ring 11 is opened and closed with the port 9 by meshing with the drive gear 13, snap 12 and the motor 14. The main body of the motor 14 and the main body of the hydraulic motor 4 are arranged side by side between the fixed plate 8 and the extension plate 2.

[0030] Please see Figures 1-2 and Figures 4-6 The rear side of the guide body 7 is provided with an arc cover 15 for guiding the oil pipe 102 into the oil pipe port 101. A support frame 16 for fixing the guide rack 6 is fixed on the arc cover 15 and is fixedly connected to the guide rack 6 through the support frame 16. The guide rack 6 is fixed to the top side of the support frame 16. The front side of the arc cover 15 is provided with a guide seat 17 for limiting the lifting clamp body 1 to only move back and forth. The guide seat 17 is wedge-fitted with the bottom of the lifting clamp body 1 and is located on the front side of the guide body 7.

[0031] The guide seat 17 includes a U-shaped bayonet 171 for engaging with the oil pipe port 101 to lock the oil pipe 102 and a guide seat 172 for limiting the movement direction of the lifting clamp body 1. The guide seat 172 is disposed on both sides of the U-shaped bayonet 171. The U-shaped bayonet 171 is disposed directly below the oil pipe port 101 and engages with the oil pipe port 101. A groove 1721 is provided on the outer side of each guide seat 172 and engages with the inner side of the guide limiting seat 103 on the front side of the lifting clamp body 1 through the groove 1721. The guide limiting seat 103 is engaged with the guide seat 172 through a meshing guide rack 6, guide gear 5, and hydraulic motor 4.

[0032] One of the guide brackets 172 is fixed with a connecting pin 18 and is hinged to a lever gear 19 for driving the lever 22. The side of the lever gear 19 is meshed with a lever rack 20 fixed to the inner wall of the guide limit seat 103 and used to limit the movement direction of the lever gear 19. The lever gear 19 is fixed with a positioning pin 21 and is hinged to a lever 22 for moving the oil pipe 102 into the oil pipe port 101 through the positioning pin 21 and the connecting pin 18. One end of the lever 22 is movable on the upper part of one of the guide brackets 172 through meshing with the lever gear 19 and the lever rack 20, meshing with the guide rack 6 and the guide gear 5, and the hydraulic motor 4. The other end of the lever 22 is movably attached to the upper inner side of the other guide bracket 172 and is simultaneously engaged with the U-shaped bayonet 171.

[0033] The working principle and usage process of this invention are as follows: Figures 1-10 As illustrated, after the guide-type power lifting clamp is assembled, the operator installs the entire guide-type power lifting clamp onto the tubing lifting equipment (the functions and structures of conventional equipment such as tubing lifting equipment are well known in the field, and the connection settings are also common knowledge, so they will not be explained here, nor are they shown in the attached drawings). The purpose is to ensure that the power lifting clamp can completely avoid the tubing coupling when lifting or lowering, solving the problem caused by manually dragging the lifting clamp body 1 or adding complex mechanisms to the traveling block hook to avoid the tubing coupling. This ensures the effectiveness and safety of the lifting clamp body 1 avoiding the tubing coupling, and solves the problem of damage to the lifting clamp body 1 and tubing caused by the lifting clamp body 1 hitting the tubing coupling. This greatly extends the service life of the power lifting clamp, realizes the automation and unmanned operation of well workover, and ensures the safety of oil well workover operations.

[0034] Since both the hydraulic motor 4 and the opening / closing motor 14 are controlled by a control box or controller (the functions and structures of conventional equipment such as control boxes or controllers are well known in the art, and the connection settings are also common knowledge, so they will not be described in detail here, nor are they shown in the attached drawings), and since before lifting the lifting clamp body 1, the guide body 7 and the lifting clamp body 1 are on the same vertical plane, and the oil pipe 102 is doubly locked by the locking ring 11 and the lever 22 into the oil pipe port 101 and pipe port 9 on the lifting clamp body 1 and into the U-shaped bayonet 171 on the front side of the guide body 7 (e.g., Figure 9As shown in Figure ①, when lifting the hoist body 1 to avoid the oil pipe coupling, the operator first operates the control box or controller to control the opening and closing motor 14 to start the drive. At this time, the drive gear 13 will drive the locking ring 11 with circumferentially distributed locking teeth 12 to open under the drive of the opening and closing motor 14, so that the oil pipe 102 can be released from the locking of the oil pipe port 101 and the pipe port 9 of the hoist body 1 under the opening of the locking ring 11. Then, the opening and closing motor 14 is turned off. Since the lever 22 has not been moved, the oil pipe 102 will still be locked in the U-shaped bayonet 171 on the front side of the guide body 7 by the lever 22. Then, the operator operates the control box or controller to control the hydraulic motor 4 to start the drive. At this time, the guide gear 5 will drive the hydraulic motor 4 to move towards the rear end of the guide rack 6 under the drive of the hydraulic motor 4, so that the hoist body 1 and the guide body 7 are displaced (i.e., the hoist body 1 moves towards the rear end of the guide body 7) until the hoist body 1 moves to the rear end of the guide body 7 and the hydraulic motor 4 is turned off (e.g., the hoist body 1 moves towards the rear end of the guide body 7). Figure 9 (As shown in Figure ②), this moves the oil pipe opening 101 of the lifting clamp body 1 away from the oil pipe 102, thus avoiding the oil pipe coupling. Simultaneously, the lever gear 19 moves towards the front end of the lever rack 20 while the guide gear 5 moves towards the rear end of the guide rack 6 (since the lever rack 20 is fixed to the inner wall of the guide limit seat 103, the moving direction of the lever gear 19 is opposite to that of the guide gear 5). This causes the lever 22 to release the oil pipe 102 as the lever gear 19 moves towards the front end of the lever rack 20, forcing the oil pipe 102 to disengage from the lock of the guide body 7 under the release of the lever 22. Then, the lifting clamp body 1 is lifted, completely avoiding the oil pipe coupling. Because the upper part of the guide body 7 is provided with an upper guide angle 23 for avoiding the oil pipe coupling, the lifting clamp body 1 can also avoid the oil pipe coupling during the lifting process (e.g., ...). Figure 9 (As shown in Figure ③), continue to lift the clamp body 1 until the clamp body 1 is completely higher than the oil pipe coupling (as shown in Figure ③). Figure 9 (As shown in Figure ④), stop lifting. Finally, operate the control box or controller to restart the hydraulic motor 4. At this time, the guide gear 5 will drive the hydraulic motor 4 to move towards the front end of the guide rack 6, causing the lifting clamp body 1 and the guide body 7 to shift (i.e., the lifting clamp body 1 moves towards the front end of the guide body 7) until the lifting clamp body 1 moves to the same vertical plane as the guide body 7. Then, turn off the hydraulic motor 4 (as shown in Figure ④). Figure 9 As shown in Figure 5), simultaneously, the lever gear 19 moves towards the rear end of the lever rack 20 while the guide gear 5 moves towards the front end of the guide rack 6, causing the lever 22 to be mounted between the two guide brackets 172 as the lever gear 19 moves towards the rear end of the lever rack 20 (as shown in Figure 5). Figure 5 (as shown)

[0035] When the lowering clamp body 1 avoids the oil pipe coupling, the initial state is that the guide body 7 and the clamp body 1 are on the same vertical plane, and the oil pipe 102 has not entered (e.g. Figure 10As shown in Figure ①, the locking ring 11 is in the open state, while the lever 22 is in the closed state (as shown in Figure ①). Figure 4 As shown), the operator first operates the control box or controller to start the hydraulic motor 4. At this time, the guide gear 5 will drive the hydraulic motor 4 to move towards the rear end of the guide rack 6, causing the lifting clamp body 1 and the guide body 7 to displace (i.e., the lifting clamp body 1 moves towards the rear end of the guide body 7) until the lifting clamp body 1 moves to the rearmost end of the guide body 7, and then the hydraulic motor 4 is turned off (as shown). Figure 10 (As shown in Figure ②), simultaneously, the lever gear 19 moves towards the front end of the lever rack 20 while the guide gear 5 moves towards the rear end of the guide rack 6, causing the lever 22 to open as the lever gear 19 moves towards the front end of the lever rack 20. Then, the lifting clamp body 1 is lowered. Due to the arc cover 15, upper guide angle 23, and guide seat 17 on the guide body 7, the lifting clamp body 1 can avoid the oil pipe coupling (such as...) during the lowering process. Figure 10 As shown in Figure ③, continue lowering the lifting clamp body 1. Since the lifting clamp body 1 has retreated to the rearmost end of the guide body 7, it can completely avoid the oil pipe coupling during the lowering process, until the upper plane of the lifting clamp body 1 is lower than the oil pipe coupling (e.g., Figure 10 (As shown in Figure ④) Stop the lowering, then operate the control box or controller to restart the hydraulic motor 4. At this time, the guide gear 5 will drive the hydraulic motor 4 to move towards the front end of the guide rack 6, causing the lifting clamp body 1 and the guide body 7 to shift (i.e., the lifting clamp body 1 moves towards the front end of the guide body 7) until the lifting clamp body 1 moves to the same vertical plane as the guide body 7. Then turn off the hydraulic motor 4. At this time, the oil pipe 102 will enter the oil pipe port 101 when the guide body 7 and the lifting clamp body 1 are on the same vertical plane (e.g., ...). Figure 10 (As shown in Figure 5) At the same time, the lever gear 19 moves towards the rear end of the lever rack 20 while the guide gear 5 moves towards the front end of the guide rack 6. This causes the lever 22 to move the oil pipe 102 as the lever gear 19 moves towards the rear end of the lever rack 20, until the oil pipe 102 is locked in the U-shaped bayonet 171 on the front side of the guide body 7 by the lever 22, so that the oil pipe 102 can be fully inserted into the oil pipe port 101. Finally, the operating control box or controller controls the opening and closing motor 14 to start the drive. At this time, the drive gear 13 will drive the locking ring 11 with the circumferentially distributed locking teeth 12 to close under the drive of the opening and closing motor 14. At this time, the oil pipe 102 will be locked in the oil pipe port 101 and the pipe port 9 on the hanging clamp body 1 when the locking ring 11 is closed, achieving the purpose of double locking. Example 2:

[0036] Please see Figures 1-10As another objective of the present invention, a tubing lifting device is provided, wherein the tubing lifting device is provided with the above-described guide-type power clamp. Therefore, the tubing lifting device can obtain any of the beneficial effects of the guide-type power clamp described above, which will not be repeated here.

Claims

1. A guide-type power lifting clamp, comprising a lifting clamp body, characterized in that, An extension plate is fixed to the middle of the rear side of the hanging clamp body. A fixing hole is provided on the extension plate and a hydraulic motor is fixed through the fixing hole. The output end of the hydraulic motor passes through the fixing hole and is rotatably connected to a guide gear. The guide gear meshes with a guide rack. The guide rack is rotatably connected to the hydraulic motor through the guide gear and a guide body is fixedly connected to its bottom. The guide body is wedge-fitted to the bottom of the hanging clamp body and is movably guided to the hanging clamp body through the meshing guide rack, guide gear, and hydraulic motor. The top of the hanging clamp body is fixedly supported by a fixing plate parallel to the extension plate. The front center of the fixing plate has a pipe opening located directly above the oil pipe opening. An inner liner fixed to the top of the oil pipe opening is embedded in the pipe opening. A locking ring is fitted onto the upper part of the inner liner and embedded in the pipe opening. Several teeth are evenly distributed around the edge of the locking ring and are connected to a drive gear through meshing with the teeth. The drive gear is embedded in the rear edge of the fixing plate and is rotatably connected to an inverted opening and closing motor fixed to the bottom of the rear edge of the fixing plate. The opening and closing motor is rotatably connected to the locking ring through the meshing drive gear and teeth. The locking ring is set to open and close with the pipe opening through the meshing drive gear, teeth, and opening and closing motor.

2. The guide-type power lifting clamp according to claim 1, characterized in that, An arc-shaped cover is provided on the rear side of the guide body. A support frame is fixed on the arc-shaped cover and is fixedly connected to the guide rack through the support frame. The guide rack is fixed to the top side of the support frame.

3. The guide-type power lifting clamp according to claim 2, characterized in that, The front end of the arc cover is provided with a guide seat that engages with the hanging clamp body, and the guide seat is located on the front side of the guide body.

4. A guide-type power lifting clamp according to claim 3, characterized in that, The guide seat includes a U-shaped bayonet and a guide seat. The guide seat is disposed on both sides of the U-shaped bayonet, and the U-shaped bayonet is disposed directly below the oil pipe opening of the lifting clamp body and is configured to cooperate with the oil pipe opening.

5. A guide-type power lifting clamp according to claim 4, characterized in that, Each of the guide brackets has a groove on its outer side, which engages with the inner side of the guide limiting seat on the front side of the hanging bracket body. The guide limiting seat is in a wedge-shaped moving connection with the guide bracket through a meshing guide rack and guide gear and a hydraulic motor.

6. A guide-type power lifting clamp according to claim 5, characterized in that, One of the guide seats is fixed with a connecting pin and a lever gear is hinged to it via the connecting pin. The side of the lever gear is engaged with a lever rack fixed to the inner side wall of the guide limit seat.

7. A guide-type power lifting clamp according to claim 6, characterized in that, The lever gear is fixed with a positioning pin and hinged to a lever through the positioning pin and connecting pin. One end of the lever is movable on the upper part of one of the guide seats through meshing with the lever gear and lever rack, meshing with the guide rack and guide gear, and a hydraulic motor. The other end of the lever is movably attached to the upper inner side of the other guide seat and simultaneously engaged with the U-shaped bayonet.

8. A guide-type power lifting clamp according to claim 1, characterized in that, The main body of the opening and closing motor is arranged side by side with the main body of the hydraulic motor between the fixed plate and the extension plate.

9. A pipeline lifting device, characterized in that, Including a guided power lifting clamp as described in any one of claims 1-8.

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