A tool for removing old tubing couplings

Abstract

A tool for disassembling used oil pipe couplings includes: a circular frame with multiple jaws arranged in a circumferential array, each jaw radially inserted into the frame, with its front end located inside the frame; a driving ring rotatably mounted coaxially on the outside of the frame, with wedges corresponding to the jaws on its inner wall, each wedge having an inclined surface, all facing the same direction circumferentially, the distance between the front end of the inclined surface and the axis of the driving ring being greater than the distance between the rear end of the inclined surface and the axis of the driving ring, and the rear end of the jaw abutting against the inclined surface; an adjustment assembly between the driving ring and the frame for adjusting and locking the relative circumferential position between the driving ring and the frame; and a connecting structure at the rear end of the frame for connecting a rotating tool, the connecting structure being a polygonal hole or shaft, coaxially arranged with the frame. This design ensures the stability of clamping the coupling, preventing slippage during coupling disassembly and improving the efficiency of coupling disassembly.

Description

Technical Field

[0001] This utility model belongs to the technical field of oil pipe coupling disassembly tools, and particularly relates to a tool for disassembling old oil pipe couplings. Background Technology

[0002] The recycling and remanufacturing of waste oil pipes mainly includes processes such as cleaning and descaling, disassembling couplings, flaw detection, end sawing, pyrolysis, rust removal, hot rolling, sizing, straightening, quenching and tempering, threading, and surface treatment. Currently, the method for disassembling couplings is as follows: first, the oil pipe is fixed using a bench vise; then, the coupling is clamped using pipe wrenches; the coupling is loosened by tapping the handle of the pipe wrench; and finally, the coupling is removed by rotating the pipe wrench. Existing pipe wrenches only make contact with the outer wall of the coupling through a pair of wires when clamping it, which easily leads to slippage during disassembly, making it impossible to quickly disassemble the coupling. Utility Model Content

[0003] To address the shortcomings of existing technologies, this utility model provides a tool for disassembling old oil pipe couplings, which can ensure the stability of the coupling clamping, thereby preventing slippage during coupling disassembly and helping to improve the disassembly efficiency of couplings.

[0004] In order to achieve the purpose of this utility model, the following solution is proposed:

[0005] A tool for disassembling old oil pipe couplings includes: a ring-shaped frame with multiple claws arranged in a circular array along the circumference, the claws being radially inserted into the frame, and the front ends of the claws being located inside the frame.

[0006] The skeleton is provided with a drive ring that rotates coaxially on the outside. The inner wall of the drive ring is provided with wedges that correspond one-to-one with the pawls. Each wedge has an inclined surface, and all the inclined surfaces face the same direction along the circumference. The distance between the front end of the inclined surface and the axis of the drive ring is greater than the distance between the rear end of the inclined surface and the axis of the drive ring. The rear end of the pawl abuts against the inclined surface.

[0007] An adjustment component is provided between the drive ring and the frame to adjust and lock the circumferential relative position between the drive ring and the frame;

[0008] The rear end of the skeleton is provided with a connecting structure for connecting a rotating tool. The connecting structure is a polygonal hole or shaft, and the hole or shaft is coaxial with the skeleton.

[0009] The beneficial effects of this utility model are as follows: This solution utilizes a skeleton to arrange multiple claws in a circumferential array to increase the connection points with the outer wall of the coupling, thereby improving the clamping stability of the coupling and preventing slippage when disassembling the coupling; furthermore, this solution uses a driving ring to synchronously drive all the claws to move together, so that all the claws synchronously press the coupling, which helps to improve the clamping efficiency and effectively ensures the coaxiality of the coupling and the skeleton, thereby ensuring the uniformity of the circumferential force on the coupling. Attached Figure Description

[0010] The accompanying drawings described herein are merely illustrative of selected embodiments, not all possible implementations, and are not intended to limit the scope of this invention.

[0011] Figure 1 A schematic diagram of the front-end structure of this application is shown.

[0012] Figure 2 A schematic diagram of the backend structure of this application is shown.

[0013] Figure 3 An exploded view of the structure of this application is shown.

[0014] Figure 4 A cross-sectional view of this application is shown.

[0015] The markings in the diagram are: skeleton-1, disc-11, support spring-12, support frame-13, claw-2, support leg-21, wear plate-22, drive ring-3, wedge-31, inclined plane-311, helical tooth-32, adjustment component-4, connecting structure-5, worm gear-6. Detailed Implementation

[0016] To make the objectives, technical solutions and advantages of the present utility model clearer, the implementation methods of the present utility model will be described in detail below with reference to the accompanying drawings. However, the embodiments described in the present utility model are only some embodiments of the present utility model, and not all embodiments.

[0017] like Figures 1 to 4 As shown, a tool for disassembling old oil pipe couplings is characterized by comprising: a ring-shaped frame 1, which has multiple claws 2 arranged in a circular array along its circumference, the claws 2 being radially inserted into the frame 1, and the front end of the claws 2 being located inside the frame 1.

[0018] A drive ring 3 is coaxially rotatably mounted on the outside of the frame 1. The inner wall of the drive ring 3 is provided with wedges 31 that correspond one-to-one with the claws 2. Each wedge 31 has an inclined surface 311, and all the inclined surfaces 311 face the same direction along the circumference. The distance between the front end of the inclined surface 311 and the axis of the drive ring 3 is greater than the distance between the rear end of the inclined surface 311 and the axis of the drive ring 3. The rear end of the claw 2 abuts against the inclined surface 311. By rotating the drive ring 3 toward the front end of the inclined surface 311, the claw 2 can be driven to move into the frame 1 through the inclined surface 311.

[0019] An adjustment component 4 is provided between the drive ring 3 and the frame 1 for adjusting and locking the relative circumferential position between the drive ring 3 and the frame 1. Specifically, a lug can be provided on the same side of the drive ring 3 and the frame 1, and the rear end of a screw is connected to one of the lugs by a ball joint. A nut is rotatably mounted on the other lug. The axis of rotation of the nut is perpendicular to the axis of the nut itself and parallel to the axis of the drive ring 3. The front end of the screw is connected to the nut. In this way, the included angle between the two lugs can be adjusted by rotating the screw, thereby achieving the purpose of adjusting the relative circumferential position between the drive ring 3 and the frame 1. Furthermore, the threaded adjustment structure can prevent the screw from moving arbitrarily along the axis, thereby achieving the purpose of locking the relative circumferential position between the drive ring 3 and the frame 1.

[0020] The rear end of the frame 1 is provided with a connecting structure 5 for connecting a rotating tool. The connecting structure 5 is a polygonal hole or shaft, and the hole or shaft is coaxially arranged with the frame 1. Specifically, the rotating tool is a wrench, socket, or pipe wrench. As a preferred structure, in this embodiment, the connecting structure 5 is set as a hexagonal shaft, which can be connected by a socket installed on the main shaft of the pneumatic wrench. In this way, the coupling can be disassembled using the pneumatic wrench, which helps to improve the convenience of disassembly operations and reduce the need for manpower. Alternatively, the connecting structure 5 can be set as a quadrilateral hole structure, which can be directly connected to the main shaft of the pneumatic wrench, and the coupling can also be disassembled using the pneumatic wrench.

[0021] When disassembling the coupling, first fix the oil pipe in a bench vise, then insert the head of the coupling into the front end of the frame 1. Use the adjusting component 4 to rotate the drive ring 3 circumferentially relative to the frame 1 towards the front end of the inclined surface 311. This allows each inclined surface 311 to simultaneously push all the jaws 2 into the frame 1, pressing the front end of the jaws 2 against the outer wall of the coupling. Use the adjusting component 4 to lock the drive ring 3 and the frame 1 to prevent the jaws 2 from reducing their pressure on the coupling. Then, use a rotating tool to rotate the frame 1 and the drive ring 3 together through the connecting structure 5, and use the jaws 2 to transmit the rotational torque to the coupling to loosen it until the coupling is removed from the end of the oil pipe. In specific implementation, when the thread connecting the coupling and the oil pipe is a right-hand thread, the rotating tool drives the connecting structure 5 to rotate counterclockwise; conversely, when the thread connecting the coupling and the oil pipe is a left-hand thread, the rotating tool drives the connecting structure 5 to rotate clockwise. Both clockwise and counterclockwise rotations are described based on the state facing the end face of the coupling.

[0022] Preferred, such as Figures 1 to 3As shown, both ends of the frame 1 are provided with disks 11, the outer diameter of which is greater than or equal to the outer diameter of the drive ring 3. The drive ring 3 is located between the two disks 11 to ensure the connection stability between the drive ring 3 and the frame 1 and the firmness of the relative position. At least one disk 11 is detachably connected to the frame 1 to facilitate the installation of the drive ring 3.

[0023] Preferably, the front end of the claw 2 is provided with a pair of parallel and spaced-apart support legs 21. The front ends of the support legs 21 pass through the frame 1 and face the inner side of the frame 1, thereby increasing the contact area between the claw 2 and the outer wall of the coupling and improving the friction between them. The frame 1 has through holes corresponding to the support legs 21, so the frame 1 has a solid structure between the support legs 21. The connection point at the ends of the two support legs 21 is located on the outer side of the frame 1. A support spring 12 is provided between the outer side of the frame 1 and the claw 2. The support spring 12 is located between the two support legs 21 of the claw 2. Specifically, the support... One end of the support spring 12 contacts the outer wall of the frame 1, and the other end abuts against the connection of the ends of the two support legs 21 and is in a compressed state. Thus, the elastic force of the support spring 12 keeps the rear end of the claw 2 in contact with the inclined surface 311, so that the claws 2 arranged in a circle maintain the maximum internal space, which facilitates the insertion of the coupling into the frame 1. When the claw 2 moves into the frame 1, the support spring 12 is compressed, and when the drive ring 3 rotates toward the rear end of the inclined surface 311, the support spring 12 drives the claw 2 to move automatically to the outside of the frame 1 to achieve the purpose of automatic opening.

[0024] Preferred, such as Figure 1 , Figure 3 and Figure 4 As shown, wear-resistant plates 22 are rotatably connected to the front end of each support leg 21. The axis of rotation is parallel to the axis of the frame 1. The wear-resistant plates 22 are installed on the support leg 21 by rotation, so that the wear-resistant plates 22 can adapt to abut against the outer wall of the coupling with different diameters, so as to ensure the friction force with the surface of the coupling in the circumferential direction.

[0025] Preferred, such as Figure 3 , Figure 4 As shown, the rear end of the claw 2 is provided with a roller 23, which makes rolling contact with the inclined surface 311 to reduce the friction between the claw 2 and the inclined surface 311.

[0026] Preferred, such as Figures 1 to 3As shown, the adjustment assembly 4 includes a section of helical teeth 32 provided on the outer wall of the drive ring 3 and a worm 6 meshing with the helical teeth 32. The structure of the helical teeth 32 is the same as the tooth structure of the worm wheel. The axis of the worm 6 is perpendicular to the axis of the drive ring 3. The frame 1 is provided with support frames 13 at both ends corresponding to the worm 6 for rotating and mounting the worm 6. In this scheme, the drive ring 3 is rotated relative to the frame 1 by rotating the worm 6 in cooperation with the helical teeth 32. After rotation, the frame 1 is prevented from rotating relative to the drive ring 3, thereby achieving the purpose of locking.

[0027] Preferably, at least one end of the worm gear 6 is provided with a turntable, which is rotated manually.

[0028] The above description is merely a preferred embodiment of this utility model and does not imply its uniqueness or limitation. Those skilled in the art should understand that various changes or equivalent substitutions made to this utility model without departing from its scope are all within the protection scope of this utility model.

Claims

1. A used tubing coupling dismounting tool, characterized in that, include: The ring structure skeleton (1) has multiple claws (2) arranged in a circular array along the circumference. The claws (2) are all radially inserted on the skeleton (1), and the front end of the claws (2) is located inside the skeleton (1). The skeleton (1) is provided with a drive ring (3) on the outside of the coaxial rotation. The inner wall of the drive ring (3) is provided with wedges (31) that correspond one-to-one with the claws (2). Each wedge (31) has an inclined surface (311), and all the inclined surfaces (311) are aligned along the circumference. The distance between the front end of the inclined surface (311) and the axis of the drive ring (3) is greater than the distance between the rear end of the inclined surface (311) and the axis of the drive ring (3). The rear end of the claw (2) abuts against the inclined surface (311). An adjustment component (4) is provided between the drive ring (3) and the frame (1) for adjusting and locking the circumferential relative position between the drive ring (3) and the frame (1); The rear end of the skeleton (1) is provided with a connecting structure (5) for connecting a rotating tool. The connecting structure (5) is a polygonal hole or shaft, and the hole or shaft is coaxial with the skeleton (1).

2. A tool for removing a coupling from an old pipe according to claim 1, characterized in that Both ends of the skeleton (1) are provided with disks (11), the outer diameter of which is greater than or equal to the outer diameter of the driving ring (3). The driving ring (3) is located between the two disks (11), and at least one disk (11) is detachably connected to the skeleton (1).

3. A tool for removing a coupling from a used pipe as defined in claim 1, wherein The front end of the claw (2) is provided with a pair of parallel and spaced legs (21). The front end of the legs (21) passes through the frame (1) and faces the inside of the frame (1). The frame (1) has through holes corresponding to the legs (21). The connection point of the ends of the two legs (21) is located on the outside of the frame (1). Support springs (12) are provided between the outside of the frame (1) and the claw (2). The support springs (12) are located between the two legs (21) of the claw (2).

4. The tool for disassembling old oil pipe couplings according to claim 3, characterized in that, The front end of each leg (21) is rotatably connected to a wear-resistant plate (22), and the axis of rotation is parallel to the axis of the frame (1).

5. A tool for removing a coupling from an old oil pipe according to claim 1 or 3, characterized in that The rear end of the claw (2) is provided with a roller (23), which makes rolling contact with the inclined surface (311).

6. A tool for removing a coupling from a used pipe as defined in claim 1, wherein The adjustment component (4) includes a section of helical teeth (32) provided on the outer wall of the drive ring (3) and a worm (6) meshing with the helical teeth (32). The structure of the helical teeth (32) is the same as the tooth structure of the worm wheel. The axis of the worm (6) is perpendicular to the axis of the drive ring (3). The frame (1) is provided with support frames (13) at both ends of the worm (6) for rotating and installing the worm (6).

7. A tool for removing a coupling from a used pipe as defined in claim 1, wherein The worm (6) has a turntable at at least one end, which is rotated manually.

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