A tubing anti-twist connection joint structure

Abstract

The utility model discloses an anti -twist connecting joint structure of oil pipe, including mounting seat, the middle part of mounting seat is provided with the through -hole of oil liquid circulation, the butt joint pipe is communicated with the one end of mounting seat, and the butt joint pipe is used for oil pipe sleeve set connection, the taper pipe is communicated in the one end of butt joint pipe, and the taper pipe is used for guiding the oil pipe sleeve setting in the butt joint pipe surface, the anti -twist piece is installed in the one end of mounting seat through detachable spare and is set in the outer circular surface of butt joint pipe, and the middle part of anti -twist piece is provided with the crimping piece for the crimping of the end portion of oil pipe insertion to butt joint pipe surface, the utility model discloses the setting of anti -twist piece, and the necked section cooperation taper pipe of anti -unhooking pipe can position oil pipe, and the reliable primary radial location is formed to the oil pipe after the sleeve, not only reduces the radial migration of oil pipe after installation, and the crimping piece of self -carrying can be targeted crimping fixed to the end portion of oil pipe, and the connection firmness of oil pipe and butt joint pipe is enhanced.

Description

Technical Field

[0001] This utility model relates to the field of oil pipe connection technology, specifically to an anti-twist connection joint structure for oil pipes. Background Technology

[0002] In the fields of hydraulic systems, engineering machinery, and petrochemicals, oil pipes are the core components of fluid transmission. The reliability of their connection joints directly determines the safety and stability of system operation. During installation, maintenance, and operation, oil pipes are often subjected to torsional stress due to factors such as vibration, external pulling force, and thermal expansion and contraction, which can lead to loosening of joints, failure of seals, or even pipeline breakage, resulting in serious consequences such as fluid leakage and equipment shutdown.

[0003] Currently, Chinese patent CN220828559U discloses a high-pressure oil pipe explosion-proof connector. The main module includes an outer pipe body, interfaces symmetrically fixed on both sides of the outer pipe body and connected to the outer pipe body, an inner pipe body fixed on the inner wall of the outer pipe body and connected to one side of the interface, a piston movably disposed in the inner cavity of the inner pipe body, a spring connecting the piston to the bottom wall of the inner pipe body, a drainage pipe fixed on the inner wall of the inner pipe body, and a pressure relief pipe installed on the inner pipe body and extending out of the outer pipe body. The outer pipe body is used to install other components. The interfaces are fixed on both sides of the outer pipe body and have external threads on the outer surface of the interfaces for connecting to the high-pressure oil pipe. One side of the inner pipe body is connected to the interface, and the other side is closed to house the piston and ensure the stability of the piston movement. The inner pipe body has waist-shaped holes arranged in a ring array for fluid in the inner pipe body to pass through the waist-shaped holes into the outer pipe body. This high-pressure oil pipe explosion-proof connector has the advantages of good explosion-proof performance and strong practicality.

[0004] The aforementioned high-pressure oil pipe explosion-proof joint has some problems in actual use. Once the outer pipe is subjected to a certain torsional force, the fixing point between the interface and the outer pipe may loosen or crack, the connection between the external thread of the interface and the oil pipe will fail to seal, and the inner pipe may twist with the outer pipe, destroying its connection stability with the interface. Utility Model Content

[0005] The purpose of this invention is to provide an anti-twist connection joint structure for oil pipes to solve the problems mentioned in the background art.

[0006] To achieve the above objectives, this utility model provides the following technical solution:

[0007] An anti-twist connection structure for an oil pipe includes a mounting base with a through hole in the center for oil flow; a connecting pipe, one end of which is connected to the mounting base and used for connecting an oil pipe; a tapered pipe, one end of which is connected to the connecting pipe and used to guide the oil pipe onto the surface of the connecting pipe; an anti-twist component, which is detachably mounted to one end of the mounting base and fitted onto the outer surface of the connecting pipe, and has a crimping component in the center for crimping the end of the oil pipe inserted into the surface of the connecting pipe; a protective pipe, which is mounted to one end of the mounting base and fitted onto the outer surface of the anti-twist component, and used to protect the outer surface of the anti-twist component; and a connecting threaded pipe for connecting equipment connected to the other end of the mounting base.

[0008] As a preferred technical solution, the anti-twisting component includes an anti-detachment tube sleeved on the outer circular surface of the connecting pipe. The inner diameter of the anti-detachment tube is larger than the outer diameter of the connecting pipe and smaller than the inner diameter of the protective pipe. The outer end of the anti-detachment tube is provided with a constricted section, and the inner wall taper of the constricted section is consistent with that of the tapered pipe.

[0009] As a preferred technical solution, the detachable component includes a fixed threaded tube communicating with the inner end of the anti-detachment tube, and one end of the mounting base is provided with a threaded groove adapted to the fixed threaded tube, and the fixed threaded tube is threadedly connected to the inner cavity of the threaded groove.

[0010] As a preferred technical solution, the crimping component includes multiple sets of rectangular holes formed on the outer circular surface of the anti-detachment tube. The rectangular holes are arranged along the length of the anti-detachment tube, and the multiple sets of rectangular holes are arranged in a circular array. Positioning rods are rotatably inserted into the inner walls of the front and rear sides of the outer ends of each set of rectangular holes. A pressure strip is fixedly connected between two sets of positioning rods in the same rectangular hole. The inner end of each set of pressure strips extends into the inner side of the corresponding rectangular hole. A rubber pad is adhered to the bottom inner side of each set of pressure strips. When the protective tube is sleeved on the surface of the anti-detachment tube, the inner wall of the protective tube simultaneously pushes the inner end of the pressure strip inward to rotate inward, thereby pressing the rubber pad against the surface of the tubing.

[0011] As a preferred technical solution, a metal spring is inserted into the inner wall of the outer end of each set of rectangular holes, and the other end of each set of metal springs is fixedly inserted into the outer end of the corresponding side pressure strip. When the protective tube is detached from the surface of the anti-detachment tube, the metal spring rotates the pressure strip outward with the positioning rod as the center under the action of elastic potential energy, thereby driving the rubber pad to detach from the rectangular hole.

[0012] As a preferred technical solution, each set of rubber pads has an arc-shaped groove on the end surface of the oil pipe that matches the surface of the oil pipe, and the inner wall of each set of arc-shaped grooves is provided with an anti-slip layer.

[0013] As a preferred technical solution, the protective fitting includes a protective tube sleeved on the surface of the anti-detachment tube, and a threaded ring is threadedly connected to the inner opening of the protective tube, and the threaded ring is fixedly connected to the outer end of the mounting base.

[0014] As a preferred technical solution, the outer end of the protective tube is connected to a rubber tube, which is sleeved on the surface of the oil pipe.

[0015] Compared with the prior art, the beneficial effects of this utility model are:

[0016] 1. This utility model, through the setting of a tapered tube and an anti-torsion component, uses a tapered tube to guide the installation of the oil pipe, reducing the assembly difficulty of the oil pipe and the connecting pipe, enabling the oil pipe to be quickly and accurately installed on the surface of the connecting pipe, improving assembly efficiency, and avoiding residual torsional stress caused by misalignment during assembly, thus reducing the risk of connection failure caused by torsional force during subsequent use. In addition, the constricted section of the anti-detachment tube, together with the tapered tube, can position the oil pipe, forming a reliable initial radial limit for the installed oil pipe, which not only reduces radial movement of the oil pipe after installation, but also the built-in crimping component can perform targeted crimping and fixing of the oil pipe end, enhancing the connection firmness between the oil pipe and the connecting pipe, and preventing loosening due to torsional force during use.

[0017] 2. This utility model, through the setting of the crimping component, has multiple sets of rectangular holes arranged in a ring array, which, together with the corresponding crimping strip structure, makes the crimping force evenly distributed along the circumference of the oil pipe. This avoids excessive local stress on the oil pipe, which could lead to deformation, and ensures the structural integrity and safety of the oil pipe. At the same time, the design of the crimping strip rotating around the positioning rod as the axis realizes the linkage between the crimping action and the installation of the protective pipe fitting. No additional crimping operation steps are required, simplifying the overall assembly process and improving installation efficiency. Furthermore, when the protective pipe fitting is installed, the crimping strip is pushed simultaneously to drive the rubber pad to crimp the oil pipe, achieving dual axial and radial fixation of the oil pipe. This effectively suppresses axial movement and radial rotation of the oil pipe during use, and greatly improves the connection firmness and sealing performance.

[0018] 3. By incorporating a rubber pad, the arc-shaped groove of which is adapted to the surface of the oil pipe, this utility model increases the contact area between the rubber pad and the oil pipe, allowing for a more uniform transmission of the crimping force and improving the stability of the crimping fixation. Furthermore, the anti-slip layer on the inner wall of the arc-shaped groove significantly increases the frictional resistance between the rubber pad and the surface of the oil pipe, further enhancing the anti-loosening effect and effectively preventing relative displacement of the oil pipe due to vibration, pulling, or other factors, thus ensuring the sealing of the connection. Attached Figure Description

[0019] Figure 1 This is a schematic diagram of the anti-twist connection joint structure for the oil pipe of this utility model;

[0020] Figure 2This is a schematic diagram of the anti-detachment tube structure of this utility model;

[0021] Figure 3 This is a schematic diagram of the threaded groove structure of this utility model;

[0022] Figure 4 This is a cross-sectional view of the anti-detachment tube of this utility model.

[0023] In the picture:

[0024] 100. Mounting base; 101. Connecting threaded pipe; 102. Protective pipe; 103. Rubber hose; 104. Threaded ring; 105. Tapered pipe; 106. Connecting pipe;

[0025] 200. Anti-detachment tube; 201. Fixed threaded tube; 202. Threaded groove; 203. Narrowing section; 204. Rectangular hole;

[0026] 300. Pressure strip; 301. Metal spring; 302. Rubber pad; 303. Arc groove; 304. Anti-slip layer; 305. Positioning rod. Detailed Implementation

[0027] The technical solutions of the present utility model will be clearly and completely described below with reference to the accompanying drawings of the embodiments. Obviously, the described embodiments are only some embodiments of the present utility model, and not all embodiments. Based on the embodiments of the present utility model, all other embodiments obtained by those of ordinary skill in the art without creative effort are within the protection scope of the present utility model.

[0028] Please see Figure 1-4 This embodiment provides an anti-twist connection joint structure for oil pipes, including a mounting base 100 with a through hole in the middle for oil flow; a connecting pipe 106 connected to one end of the mounting base 100 and used for connecting the oil pipe; a tapered pipe 105 connected to one end of the connecting pipe 106 and used to guide the oil pipe onto the surface of the connecting pipe 106; and an anti-twist component, which is installed via a detachable component. At one end of the mounting base 100 and on the outer circular surface of the connecting pipe 106, the anti-torsion member has a crimping member in the middle for crimping the end of the oil pipe that is inserted into the surface of the connecting pipe 106; the protective tube 102 is installed at one end of the mounting base 100 and on the outer circular surface of the anti-torsion member through a connector, and the protective tube 102 is used to protect the outer surface of the anti-torsion member; the other end of the mounting base 100 is connected to a connecting threaded pipe 101 for connecting equipment;

[0029] The anti-twisting component includes an anti-detachment tube 200 fitted onto the outer circumference of the connecting pipe 106. The inner diameter of the anti-detachment tube 200 is larger than the outer diameter of the connecting pipe 106 but smaller than the inner diameter of the protective tube 102. A constricted section 203 is provided at the outer end of the anti-detachment tube 200. The inner wall taper of the constricted section 203 is consistent with that of the tapered tube 105. Through the tapered tube 105 and the anti-twisting component, the tapered tube 105 guides the installation of the oil pipe, reducing the assembly difficulty between the oil pipe and the connecting pipe 106, allowing the oil pipe to be quickly and accurately fitted onto the surface of the connecting pipe 106, improving efficiency. This improves assembly efficiency and avoids residual torsional stress caused by misalignment during assembly, reducing the risk of connection failure due to torsional force during subsequent use. Furthermore, the constricted section 203 of the anti-detachment tube 200, in conjunction with the tapered tube 105, can position the oil pipe and form a reliable initial radial limit for the sleeved oil pipe. This not only reduces radial movement of the oil pipe after installation, but also allows the built-in crimping fitting to specifically crimp and fix the oil pipe end, enhancing the connection between the oil pipe and the connecting tube 106 and preventing loosening due to torsional force during use.

[0030] The detachable component includes a fixed threaded tube 201 connected to the inner end of the anti-detachment tube 200. One end of the mounting base 100 has a threaded groove 202 that matches the fixed threaded tube 201. The fixed threaded tube 201 is threadedly connected to the inner cavity of the threaded groove 202. Through the setting of the detachable component, the threaded connection between the fixed threaded tube 201 and the threaded groove 202 achieves a stable assembly between the anti-torsion component and the mounting base 100, ensuring that the anti-detachment tube 200 will not shift or loosen during use, thus improving the overall stability of the structure. In addition, the threaded connection has the advantage of convenient disassembly and assembly, and the anti-torsion component can be installed and disassembled without special tools, which facilitates the subsequent inspection or replacement of oil pipes, crimping parts, etc., and reduces maintenance costs.

[0031] The crimping component includes multiple sets of rectangular holes 204 formed on the outer circular surface of the anti-detachment tube 200. The rectangular holes 204 are arranged along the length of the anti-detachment tube 200, and the multiple sets of rectangular holes 204 are arranged in a circular array. A positioning rod 305 is rotatably inserted into the inner walls of the front and rear sides of the outer end of each set of rectangular holes 204. A pressure strip 300 is fixedly connected between two sets of positioning rods 305 in the same rectangular hole 204. The inner end of each pressure strip 300 extends into the inner side of the corresponding rectangular hole 204. A rubber pad 302 is adhered to the bottom inner side of each pressure strip 300. When the protective tube 102 is sleeved on the surface of the anti-detachment tube 200, the inner wall of the protective tube 102 simultaneously pushes the inner end of the pressure strip 300 inward to rotate inward, thereby pressing the rubber pad 302 into the oil pipe. On the surface, through the setting of the crimping component, multiple sets of rectangular holes 204 are distributed in a ring array. With the corresponding crimping strip 300 structure, the crimping force is evenly distributed along the circumference of the oil pipe, avoiding excessive local stress on the oil pipe and causing deformation, thus ensuring the structural integrity and safety of the oil pipe. At the same time, the design of the crimping strip 300 rotating around the positioning rod 305 as the axis realizes the linkage between the crimping action and the installation of the protective tube 102, eliminating the need for additional crimping operation steps, simplifying the overall assembly process, and improving installation efficiency. Furthermore, when the protective tube 102 is fitted, the crimping strip 300 is pushed simultaneously to drive the rubber pad 302 to crimp the oil pipe, achieving dual axial and radial fixation of the oil pipe, effectively suppressing axial movement and radial rotation during the use of the oil pipe, and greatly improving the connection firmness and sealing performance.

[0032] Each set of rectangular holes 204 has a metal spring 301 inserted into the inner wall of its outer end. The other end of each set of metal springs 301 is fixedly inserted into the outer end of the corresponding side pressure strip 300. When the protective tube 102 is removed from the surface of the anti-detachment tube 200, the metal spring 301 rotates the pressure strip 300 outward with the positioning rod 305 as the center under the action of elastic potential energy, thereby driving the rubber pad 302 to disengage from the rectangular hole 204. Through the setting of the metal spring 301 and the elastic reset function of the metal spring 301, the pressure strip 300 can be automatically pushed outward after the protective tube 102 is disassembled, driving the rubber pad 302 to disengage from the oil pipe and retract into the rectangular hole 204. The crimping fixation can be released without manual operation, which significantly improves the convenience of oil pipe disassembly.

[0033] Each rubber pad 302 has an arc-shaped groove 303 on the end surface of the oil pipe that matches the surface of the oil pipe. The inner wall of each arc-shaped groove 303 is provided with an anti-slip layer 304. By setting the rubber pad 302, the arc-shaped groove 303 of the rubber pad 302 matches the surface of the oil pipe, which can increase the contact area between the rubber pad 302 and the oil pipe, so that the crimping force is transmitted more evenly and the stability of the crimping fixation is improved. In addition, the anti-slip layer 304 on the inner wall of the arc-shaped groove 303 can significantly increase the frictional resistance between the rubber pad 302 and the surface of the oil pipe, further enhancing the anti-loosening effect, effectively preventing the oil pipe from relative displacement due to vibration, pulling and other factors, and ensuring the connection sealing.

[0034] Among them, the anti-slip layer 304 is an anti-slip texture integrally formed on the inner wall of the arc groove 303, and the anti-slip texture is either ring-shaped or diamond-shaped.

[0035] The protective tube 102 includes a protective tube 102 sleeved on the surface of the anti-detachment tube 200. The inner opening of the protective tube 102 is threaded with a threaded ring 104, which is fixedly connected to the outer end of the mounting base 100. Through the setting of the protective tube 102, the threaded ring 104 and the mounting base 100 are threadedly connected. The connection method is stable and reliable, ensuring that the protective tube 102 will not fall off or loosen during use, thus ensuring the continuity of the protective effect. Furthermore, the protective tube 102 sleeved on the outside of the anti-detachment tube 200 forms a closed physical protective barrier, which can effectively block external collisions, dust, moisture and corrosive media from eroding the anti-torsion component and the crimping component, extending the service life of the internal core components. At the same time, the threaded connection method facilitates the disassembly and assembly of the protective tube 102. The crimping force of the crimping component on the oil pipe can be adjusted by controlling the thread tightening degree, so that the device can be adapted to oil pipes of different materials and thicknesses, improving the versatility of the device. It also facilitates subsequent inspection and maintenance of the internal crimping component and the anti-detachment tube 200.

[0036] The outer end of the protective tube 102 is connected to a rubber tube 103, which is sleeved on the surface of the oil pipe. The rubber tube 103 has good flexibility and elasticity, which can absorb the vibration generated during pipeline operation, reduce the impact of vibration on the oil pipe connection, reduce the risk of loosening or leakage caused by vibration, and improve the connection stability. In addition, the rubber tube 103 is sleeved on the extension section of the oil pipe, which can limit the bending angle of the oil pipe connection. Together with the rigid support of the anti-detachment tube 200, a synergistic anti-torsion structure of flexible limiting and rigid protection is formed, which effectively prevents damage to the oil pipe connection caused by excessive bending or twisting and ensures the connection sealing.

[0037] Working principle;

[0038] Align the end of the oil pipe to be connected with the tapered tube 105, and slowly slip it onto the surface of the connecting tube 106 along the inner wall guide direction of the tapered tube 105, ensuring that the end of the oil pipe fits against the end face of the mounting base 100.

[0039] Align the threaded tube 201 of the anti-detachment tube 200 with the threaded groove 202 of the mounting base 100, and tighten it by rotating to fix it. At this time, the anti-detachment tube 200 is sleeved on the outside of the connecting tube 106 and the oil pipe, and the constricted section 203 fits against the outer wall of the oil pipe to complete the initial positioning.

[0040] The protective tube 102 is fitted onto the outside of the anti-detachment tube 200, so that the inner opening of the protective tube 102 is aligned with the end of the threaded ring 104 installed on the outer end of the mounting base 100. The protective tube 102 and the threaded ring 104 are threaded together. The inner wall of the protective tube 102 gradually presses the pressure strip 300 inward, which drives the rubber pad 302 to press the surface of the oil pipe, completing the crimping and fixing. At the same time, the rubber tube 103 is naturally fitted onto the extension section of the oil pipe, forming full-link protection.

[0041] When the protective tube 102 is fitted onto the surface of the anti-detachment tube 200, its inner wall exerts an inward pushing force on the pressure strip 300 on the surface of the anti-detachment tube 200, causing the pressure strip 300 to rotate inward around the positioning rod 305 as the axis, driving the inner rubber pad 302 to press against the surface of the oil pipe. Thus, the arc groove 303 of the rubber pad 302 fits against the surface of the oil pipe, and the anti-slip layer 304 increases the frictional resistance, achieving dual fixation of the oil pipe in both the axial and radial directions. At the same time, the layout of the annular array of pressure strips 300 ensures uniform force distribution and avoids local deformation of the oil pipe.

[0042] When the protective tube 102 is disassembled, the metal spring 301 releases its elastic potential energy, pushing the pressure strip 300 to rotate outward around the positioning rod 305. The rubber pad 302 detaches from the surface of the oil pipe and retracts into the rectangular hole 204, releasing the fixed state and facilitating the disassembly of the oil pipe.

[0043] Although embodiments of the present invention have been shown and described, it will be understood by those skilled in the art that various changes, modifications, substitutions and alterations can be made to these embodiments without departing from the principles and spirit of the present invention, the scope of which is defined by the appended claims and their equivalents.

Claims

1. A torsion-resistant connection joint structure for oil pipes, characterized in that, include: Mounting base (100), wherein a through hole for oil flow is provided in the middle of the mounting base (100); Connector (106), which is connected to one end of mounting base (100), and is used for oil supply pipe sleeve connection; A tapered tube (105) is connected to one end of a connecting tube (106), and the tapered tube (105) is used to guide the oil pipe to be sleeved on the surface of the connecting tube (106); Anti-twist component, the anti-twist component is installed at one end of the mounting base (100) by a detachable component and sleeved on the outer circular surface of the connecting pipe (106), the middle part of the anti-twist component is provided with a crimping component for crimping the end of the oil pipe inserted into the surface of the connecting pipe (106); A protective tube (102) is installed at one end of the mounting base (100) via a connector and sleeved on the outer circular surface of the anti-torsion component. The protective tube (102) is used to protect the outer surface of the anti-torsion component. The other end of the mounting base (100) is connected to a connecting threaded pipe (101) for connecting equipment.

2. The anti-twist connection joint structure for oil pipes according to claim 1, characterized in that: The anti-twisting component includes an anti-detachment tube (200) sleeved on the outer circular surface of the connecting tube (106). The inner diameter of the anti-detachment tube (200) is larger than the outer diameter of the connecting tube (106) and smaller than the inner diameter of the protective tube (102). The outer end of the anti-detachment tube (200) is provided with a constricted section (203), and the inner wall taper of the constricted section (203) is consistent with that of the tapered tube (105).

3. The anti-twist connection joint structure for an oil pipe according to claim 2, characterized in that: The detachable component includes a fixed threaded tube (201) connected to the inner end of the anti-detachment tube (200). One end of the mounting base (100) is provided with a threaded groove (202) adapted to the fixed threaded tube (201). The fixed threaded tube (201) is threadedly connected to the inner cavity of the threaded groove (202).

4. The anti-twist connection joint structure for an oil pipe according to claim 2, characterized in that: The crimping component includes multiple sets of rectangular holes (204) formed on the outer circular surface of the anti-detachment tube (200). The rectangular holes (204) are arranged along the length of the anti-detachment tube (200), and the multiple sets of rectangular holes (204) are arranged in a circular array. A positioning rod (305) is rotatably inserted into the inner walls of the front and rear sides of the outer end of each set of rectangular holes (204). A crimping component is fixedly connected between two sets of positioning rods (305) in the same rectangular hole (204). Each set of pressure strips (300) has its inner end extending toward the inner side of the corresponding rectangular hole (204). Each set of pressure strips (300) has a rubber pad (302) bonded to its inner bottom. When the protective tube (102) is fitted onto the surface of the anti-detachment tube (200), the inner wall of the protective tube (102) simultaneously pushes the inner end of the pressure strip (300) inward to rotate inward, thereby pressing the rubber pad (302) against the surface of the oil pipe.

5. The anti-twist connection joint structure for an oil pipe according to claim 4, characterized in that: A metal spring (301) is inserted into the inner wall of the outer end of each set of rectangular holes (204). The other end of each set of metal springs (301) is fixedly inserted into the outer end of the corresponding side pressure strip (300). When the protective tube (102) is removed from the surface of the anti-detachment tube (200), the metal spring (301) rotates the pressure strip (300) outward with the positioning rod (305) as the center under the action of elastic potential energy, thereby driving the rubber pad (302) to come out of the rectangular hole (204).

6. The anti-twist connection joint structure for an oil pipe according to claim 5, characterized in that: Each set of rubber pads (302) has an arc-shaped groove (303) on the end surface of the oil pipe that is adapted to the surface of the oil pipe, and the inner wall of each set of arc-shaped grooves (303) is provided with an anti-slip layer (304).

7. The anti-twist connection joint structure for an oil pipe according to claim 1, characterized in that: The protective tube (102) includes a protective tube (102) sleeved on the surface of the anti-detachment tube (200), and a threaded ring (104) is threadedly connected to the inner opening of the protective tube (102), and the threaded ring (104) is fixedly connected to the outer end of the mounting base (100).

8. The anti-twist connection joint structure for an oil pipe according to claim 7, characterized in that: The outer end of the protective tube (102) is connected to a rubber tube (103), which is sleeved on the surface of the oil pipe.

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