Double-sealing-ring self-tightening type quick pipeline connecting device

Abstract

The utility model discloses a double-sealing-ring self-tightening type pipeline quick connecting device which comprises a connecting body, a first sealing ring, a second sealing ring, a locking ring and an elastic clamping jaw. Inserting cavities are formed in the two ends of the connecting body, and first sealing grooves and second sealing grooves are formed in the inner walls of the inserting cavities and provided with first sealing rings and second sealing rings respectively. The outer wall of the connecting body is provided with external threads, and the locking ring is matched and connected with the external threads through the internal threads. And the elastic clamping jaw is arranged at the end part of the insertion cavity to form a clamping part. By arranging the double sealing rings, namely the first sealing ring and the second sealing ring, the sealing performance of pipeline connection can be effectively improved, and the leakage phenomenon is reduced.

Description

Technical Field

[0001] This utility model relates to the field of pipe connection technology, specifically a double-sealing ring self-tightening quick pipe connection device. Background Technology

[0002] Currently, in pipeline transportation systems, pipe connections are typically made using flange connections, threaded connections, or welding. Flange connections require numerous bolts for fixing, making installation cumbersome, time-consuming, and labor-intensive. Furthermore, their sealing performance depends heavily on the quality and installation accuracy of the sealing ring; a single sealing ring is prone to leakage under high pressure or vibration. While welded connections offer high strength, they are permanent connections, hindering pipe disassembly and maintenance. Welding defects are also prone to occur, affecting the pipe's sealing performance and service life. Therefore, there is an urgent need for a pipe connection device that can be installed quickly, provides reliable sealing, and is easy to disassemble and maintain. Utility Model Content

[0003] The technical problem to be solved by this utility model is to provide a double-sealing ring self-tightening quick-connect pipe device, which improves sealing performance and facilitates installation and disassembly.

[0004] To solve the above-mentioned technical problems, the present invention adopts the following technical solution: a double-sealing self-tightening quick-connect pipe device, comprising a connecting body, a first sealing ring, a second sealing ring, a locking ring, and elastic claws.

[0005] The connecting body has a hollow tubular structure with insertion cavities at both ends for inserting pipes. The inner wall of the connecting body has an annular first sealing groove and a second sealing groove, with the first sealing groove located in the middle of the connecting body and the second sealing groove located at the end of the insertion cavity. A first sealing ring and a second sealing ring are respectively installed in the first and second sealing grooves, and both are elastic sealing rings. The outer wall of the connecting body has external threads, and the inner wall of the locking ring has internal threads that mate with the external threads. The locking ring is threadedly connected to the outer wall of the connecting body. Elastic claws are located at the end of the insertion cavity to lock the pipe's outer wall into place.

[0006] Furthermore, the first sealing ring includes an annular ring connected to the first sealing groove and an elastic sealing sleeve connected to the annular ring. The sidewall of the elastic sealing sleeve has a corrugated structure. This structure allows the corrugated sidewall of the elastic sealing sleeve to better conform to the outer wall of the pipe when the first sealing ring is under pressure, thereby enhancing the sealing effect.

[0007] Furthermore, the cross-sectional shape of the second sealing ring is O-shaped. O-rings have advantages such as simple structure, good sealing performance, and low cost, and can play a good sealing role at the end of the insertion cavity.

[0008] Furthermore, the elastic claw has a V-shaped structure, with one end fixed to the end of the connecting body and the other end being a free end. The V-shaped elastic claw can provide a large clamping force when it clamps the locking part of the pipe's outer wall, ensuring the stability of the pipe connection.

[0009] Furthermore, the inner wall of the locking ring is provided with an internal thread that mates with the external thread, and a limiting protrusion is provided inside the other end. The limiting protrusion can limit the range of movement of the locking ring, prevent the locking ring from being over-tightened or loosened, and ensure the reliability of the connection device.

[0010] Furthermore, there are multiple elastic jaws, evenly distributed at the end of the insertion cavity. The even distribution of multiple elastic jaws ensures a more uniform clamping force, improving the stability and reliability of the pipe connection.

[0011] The beneficial effects of this utility model are as follows:

[0012] The device employs a double sealing ring structure, with the first and second sealing rings located in the middle and end of the insertion cavity, respectively, forming a double seal to improve sealing performance and effectively prevent liquid or gas leakage.

[0013] The elastic sealing sleeve sidewall of the first sealing ring has a wavy structure, which has good elasticity and adaptability, and can achieve self-tightening sealing under different pressures and working conditions, thus enhancing the reliability of the seal.

[0014] The flexible clamps have a V-shaped structure, are numerous and evenly distributed, and can provide a large clamping force to ensure the stability of the pipe connection, while also enabling quick connection and disassembly, thus improving work efficiency.

[0015] The locking ring is threaded onto the connecting body, which is simple in structure and easy to operate. The limiting protrusion can limit the movement range of the locking ring and ensure the reliability of the connecting device. Attached Figure Description

[0016] The present invention will be further described below with reference to the accompanying drawings and embodiments.

[0017] Figure 1 This is a schematic diagram of the structure of this utility model.

[0018] Figure 2 for Figure 1 A magnified view of A in the middle.

[0019] Figure 3 for Figure 1 A magnified view of B in the middle. Detailed Implementation

[0020] The technical solution of this utility model will be clearly and completely described below through specific embodiments.

[0021] refer to Figures 1-3 This utility model relates to a double-sealing self-tightening quick-connect pipe device, which includes a connecting body 1, a first sealing ring 2, a second sealing ring 3, a locking ring 4, and an elastic claw 5.

[0022] The connecting body 1 is integrally formed from high-strength alloy steel, forming a hollow tubular structure. The symmetrically arranged insertion cavities 6 at both ends are precision CNC machined, with an inner wall roughness of Ra0.8μm to ensure a tight fit with the pipeline. The inner wall of the connecting body 1 has a first sealing groove 7 and a second sealing groove 8 distributed axially. The first sealing groove 7 is 3mm deep and 4mm wide, precisely positioned in the middle of the connecting body 1, at a stress concentration area where the pipeline is joined, effectively dispersing pressure. The second sealing groove 8 is 2.5mm deep and 3.5mm wide, located at the end of the insertion cavity 6, preventing media leakage from the port.

[0023] Both the first sealing ring 2 and the second sealing ring 3 are made of oil-resistant nitrile butadiene rubber (NBR) and manufactured using a compression molding process, exhibiting excellent aging resistance and corrosion resistance. The first sealing ring 2 consists of an annular ring 21 and an elastic sealing sleeve 22. The annular ring 21 is firmly embedded in the first sealing groove 7 through an interference fit, serving a positioning and support function. The elastic sealing sleeve 22 is located on both sides of the annular ring 21, with a corrugated cross-section design on its sidewalls. This structure can generate multi-stage deformation under pressure, forming multiple sealing barriers, improving sealing performance by more than 30% compared to traditional sealing rings. The second sealing ring 3 adopts a classic O-shaped cross-section. After being installed in the second sealing groove 8, it can achieve radial self-tightening through its own elastic deformation when the pipe is inserted, ensuring the sealing of the connection.

[0024] The connecting body 1 is integrally molded from high-strength alloy material. Its outer wall is precision-machined with equidistant trapezoidal external threads, with a pitch of 1.5mm and a thread angle of 60°. The surface is treated with an anti-rust coating. The inner wall of the matching locking ring 4 is machined with internal threads using a CNC lathe, which mate with the external threads. The locking ring 4 is connected to the outer wall of the connecting body 1 via a rotating thread and can be freely adjusted axially. The other end of the locking ring 4 has a cold-extruded limiting protrusion ring 12, which is 2mm high and has an outer diameter 0.5mm smaller than the inner diameter of the pipe interface.

[0025] The elastic jaws 5 adopt a V-shaped structure design. The V-angle of a single jaw is optimized to 60° through mechanical simulation, which ensures both gripping force on the outer wall of the pipe and reduces installation resistance. There are six sets of jaws, evenly distributed along the circumferential direction of the end of the insertion cavity 6, with a 60° interval between adjacent jaws. One end of each set of jaws is fixedly connected to the annular boss at the end of the connecting body 1 through a hot-pressing process, while the other end is in a free-opening state. During operation, the elastic jaws 5 utilize the radial contraction force generated by their own elastic deformation to firmly clamp the pre-fabricated clamping part 11 on the outer wall of the pipe, achieving rapid positioning and anti-disengagement functions.

[0026] When connecting a pipe, insert the pipe into the connector cavity. The locking part on the outer wall of the pipe contacts the elastic claws, and the free end of the elastic claws opens. As the pipe is inserted deeper, the elastic claws gradually lock the locking part. Then, rotate the locking ring. The locking ring, through its internal thread, engages with the external thread of the connecting body, moving towards the end of the connector cavity and pushing the elastic claws to tighten, further securing the pipe. Simultaneously, the first and second sealing rings are compressed during pipe insertion, forming a seal. Because the elastic sealing sleeve of the first sealing ring has a corrugated sidewall, it can better conform to the outer wall of the pipe under pressure, achieving a self-tightening seal; the O-ring structure of the second sealing ring also provides a good sealing effect at the end. When disassembling the pipe, rotate the locking ring in the opposite direction, the elastic claws release, and the pipe can be easily pulled out.

[0027] The above description is merely a preferred embodiment of the present utility model and is not intended to limit the present utility model. Those skilled in the art can make various modifications or equivalent substitutions to the present utility model within its substance and protection scope, and such modifications or equivalent substitutions should also be considered to fall within the protection scope of the present utility model's technical solution.

Claims

1. A double-sealing ring self-tightening quick-connect pipe device, characterized in that: It includes a connecting body (1), a first sealing ring (2), a second sealing ring (3), a locking ring (4), and elastic claws (5); the connecting body (1) is a hollow tubular structure with insertion cavities (6) for inserting pipes at both ends; the inner wall of the connecting body (1) is provided with an annular first sealing groove (7) and a second sealing groove (8), the first sealing groove (7) being located in the middle of the connecting body (1), and the second sealing groove (8) being located at the end of the insertion cavity (6); the first sealing ring ( 2) The first sealing groove (7) and the second sealing groove (8) are respectively installed in the first sealing groove (7) and the second sealing groove (8), and the first sealing ring (2) and the second sealing ring (3) are both elastic sealing rings; the outer wall of the connecting body (1) is provided with an external thread, and the inner wall of the locking ring (4) is provided with an internal thread that matches the external thread. The locking ring (4) is connected to the outer wall of the connecting body (1) by the thread; the elastic claw (5) is set at the end of the insertion cavity (6) and is used to lock the locking part (11) of the outer wall of the pipe.

2. The double-sealing ring self-tightening quick-connect pipe device according to claim 1, characterized in that: The first sealing ring (2) includes an annular ring (21) connected to the first sealing groove (7) and an elastic sealing sleeve (22) connected to the annular ring (21); the side wall cross section of the elastic sealing sleeve (22) is a wave-shaped structure.

3. The double-sealing ring self-tightening quick-connect pipe device according to claim 1, characterized in that: The cross-sectional shape of the second sealing ring (3) is O-shaped.

4. The double-sealing ring self-tightening quick-connect pipe device according to claim 1, characterized in that: The elastic claw (5) has a V-shaped structure, with one end fixed to the end of the connecting body (1) and the other end being a free end.

5. The double-sealing ring self-tightening quick-connect pipe device according to claim 1, characterized in that: The inner wall of the locking ring (4) is provided with an internal thread that matches the external thread, and a limit ring (12) is provided inside the other end.

6. The double-sealing ring self-tightening quick-connect pipe device according to claim 1, characterized in that: The number of elastic claws (5) is multiple, and they are evenly distributed at the end of the insertion cavity (6).

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