Pipe joint for fuel gas

Abstract

A gas pipe joint comprises a joint body and a sealing ring, the joint body is provided with at least two birdmouths for a pipeline to insert, and locking parts capable of connecting the joint body and the pipeline are sleeved at the birdmouths, and the gas pipe joint is characterized in that the end parts of the birdmouths extend outwards along the circumferential direction to form arc-shaped grooves corresponding to the sealing ring; an arc-shaped groove is formed in the inner circumferential wall of the locking part, part of the sealing ring can be placed in the arc-shaped groove, the inner circumferential wall of the locking part is concaved outwards to form a first annular groove, the first annular groove comprises an arc-shaped section corresponding to the arc-shaped groove and an inclined plane section contracting inwards in the axial direction of the birdmouth, and when the locking part is in a locking state, the arc-shaped section drives the arc-shaped groove to enable part of the sealing ring to abut against the pipeline; and the inclined surface section extrudes the sealing rings, so that the other sealing rings are propped against the pipeline. The sealing ring of the pipe joint is in surface contact with the joint body and the locking part, so that the sealing effect of the sealing ring on a pipeline and the pipe joint is better, and the pipe joint can be assembled and disassembled by adjusting the locking state or the unlocking state of the locking part.

Description

Technical Field

[0001] This utility model relates to pipeline connection technology, and in particular to a gas pipe connector. Background Technology

[0002] Pipe connections are a very common application requirement in pipeline construction. Currently, pipe fittings are commonly used to connect gas pipelines. Pipe fittings are typically hollow cylindrical shells. The two pipes to be connected are inserted into the openings at both ends of the pipe fitting, thereby sealing and connecting the two pipes. An existing pipe fitting, as shown in Chinese Utility Model Patent No. CN201120369470.7 (Authorization Announcement No. CN202302516U), includes a shell, fastening devices, a sealing ring, and a clamp. The shell is cylindrical, with an axially broken opening on its cylindrical surface. Fastening devices for tightening and locking the opening are provided on both sides of the shell. The sealing ring and clamp are nested inside the shell, and the clamp's teeth are arranged in a crescent-shaped pattern.

[0003] Although the aforementioned pipe fittings can use a sealing ring to seal the gap between the outer casing and the pipe, in existing pipe fittings, the sealing ring is located between the outer casing and the pipe. This sealing ring often has line contact with both the inner wall of the outer casing and the outer wall of the pipe, resulting in poor sealing performance and consequently affecting the connection between the pipe fitting and the pipe. Therefore, further improvements are needed for gas pipe fittings. Summary of the Invention

[0004] The technical problem to be solved by this utility model is to provide a gas pipe connector with a reasonable structure and better sealing effect, in view of the above-mentioned existing technology.

[0005] The technical solution adopted by this utility model to solve the above-mentioned technical problems is as follows: the gas pipe connector includes a connector body and a sealing ring. The connector body is provided with at least two sockets for pipe insertion. A locking part that can connect the connector body and the pipe is sleeved at the socket. The characteristic is that: the end of the socket extends outward in the circumferential direction to form an arc-shaped groove corresponding to the sealing ring. Part of the sealing ring can be placed in the arc-shaped groove. The inner circumferential wall of the locking part is recessed outward to form a first annular groove. The first annular groove includes an arc segment corresponding to the arc-shaped groove and a slope segment that shrinks inward along the axial direction of the socket. In the locked state, the arc segment drives the arc-shaped groove to make part of the sealing ring abut against the pipe. The slope segment squeezes the sealing ring to make the remaining sealing ring abut against the pipe.

[0006] Preferably, the sealing ring includes a first sealing ring and a second sealing ring. The first sealing ring is disposed within an arc-shaped groove and located on an arc segment, while the second sealing ring is disposed within a first annular groove and located on a slope segment. The second sealing ring has a slope corresponding to the slope segment. The first and second sealing rings are two independent components arranged adjacent to each other. The cross-section of the first sealing ring is circular. Therefore, the first sealing ring contacts the surface of the arc-shaped groove, and the slope of the second sealing ring contacts the slope segment of the locking part, thereby improving the sealing effect between the pipe and the pipe joint. Furthermore, the first sealing ring is subjected to pressure from the arc-shaped groove while also being subjected to force from the second sealing ring, thus enhancing the sealing effect of the first sealing ring. Similarly, the second sealing ring is subjected to pressure from the slope segment while also being subjected to force from the first sealing ring, thus enhancing the sealing effect of the second sealing ring. Of course, the first and second sealing rings can also be a single unit.

[0007] Preferably, a second annular groove is formed by an outward recess on the inner peripheral wall of the locking part. A clamp with locking teeth is installed in the second annular groove. When the locking part is locked, the locking teeth of the clamp are inserted into the outer wall of the pipe. The clamp with locking teeth can provide axial force between the pipe joint and the pipe under the action of the locking part, making the connection between the pipe and the pipe joint tighter.

[0008] Preferably, the first and second annular grooves are spaced apart along the axial direction of the bearing interface. The sealing ring and the clamp are independently distributed, so that when the sealing ring is compressed and deformed, it will not affect the clamp teeth from penetrating the outer wall of the pipe.

[0009] Preferably, the clamp has at least two rows of teeth arranged in a staggered pattern. Multiple teeth improve the connection between the pipe and the fitting.

[0010] Preferably, the locking part includes two opposing semi-rings, each with connecting ears at both ends and bolt holes on the connecting ears. Bolts pass through the corresponding bolt holes in the two semi-rings, locking the locking part in a locked state. The locking part is a bolt-locked clamp, which is more flexible and convenient than using hydraulic clamping tools, and also facilitates disassembly and repair, simplifying the production process and improving production efficiency.

[0011] Compared with existing technologies, the advantages of this utility model are as follows: This gas pipe connector can achieve a sealed connection between the connector body and the pipe using a locking part and a sealing ring. Specifically, when the locking part is in the locked state, part of the sealing ring forms surface contact with the arc-shaped groove, while the remaining sealing rings are deformed by compression and form surface contact with the inclined section. Therefore, the sealing ring can effectively seal the gap between the pipe and the connector under the use of the locking part, resulting in a better sealing effect. Furthermore, this gas pipe connector is simple to operate; the connection and disconnection can be achieved by adjusting the locking or unlocking state of the locking part. Attached Figure Description

[0012] Figure 1 This is a schematic diagram of the structure of an embodiment of the present utility model;

[0013] Figure 2 This is an exploded view of an embodiment of the present utility model;

[0014] Figure 3 This is a cross-sectional view of an embodiment of the present utility model;

[0015] Figure 4 This is a schematic diagram of the semi-ring structure in an embodiment of the present invention;

[0016] Figure 5 This is a schematic diagram of the connector body in an embodiment of the present invention. Detailed Implementation

[0017] The present invention will be further described in detail below with reference to the accompanying drawings and embodiments.

[0018] like Figures 1-5 The image shown is the preferred embodiment of this utility model.

[0019] like Figure 1 and Figure 2 As shown, the gas pipe connector of this embodiment includes a connector body 1, a locking part 2, and a sealing ring 3. The connector body 1 is provided with two sockets 11 for inserting pipes 6, and the locking part 2, which can connect the connector body 1 and the pipe 6, is fitted onto the sockets 11. Wherein, as Figure 4 As shown, the locking part 2 in this embodiment includes two opposing semi-rings 23. The two ends of the semi-rings 23 are provided with connecting ears 231. The connecting ears 231 are provided with bolt holes. The bolts 5 pass through the corresponding bolt holes of the two semi-rings 23, so that the locking part 2 is in a locked state.

[0020] like Figure 3As shown, in this embodiment, the end of the receiving interface 11 extends outward in the circumferential direction to form an arc-shaped groove 111 corresponding to the sealing ring 3. The sealing ring 3 includes a first sealing ring 31 and a second sealing ring 32. A first annular groove 21 and a second annular groove 22 are recessed outward on the inner circumferential wall of the locking part 2. The first annular groove 21 includes an arc segment 211 corresponding to the arc-shaped groove 111 and a sloped segment 212 that tapers inward along the axial direction of the receiving interface 11. The first sealing ring 31 is disposed within the arc-shaped groove 111 and located within the arc segment 211. The second sealing ring 32 is disposed within the first annular groove 21 and located within the sloped segment 212. The second sealing ring 32 has a sloped surface 321 corresponding to the sloped segment 212. The locking part 2... In the tight state, the arc segment 211 drives the arc groove 111 to bring the first sealing ring 31 into contact with the pipe 6. The first sealing ring 31 and the arc groove 111 form a surface contact. The inclined segment 212 squeezes the second sealing ring 32, bringing the second sealing ring 32 into contact with the pipe 6. The second sealing ring 32 deforms under the pressure and forms a surface contact with the inclined segment 212. The inclined segment 212 causes the second sealing ring 32 to generate forces along the axial direction and radial direction of the pipe 6. The force generated by the second sealing ring 32 along the axial direction of the pipe 6 will further squeeze the first sealing ring 31, making the first sealing ring 31 further abut against the arc groove 111 and the pipe 6, and making the sealing effect of the first sealing ring 31 on the gap between the pipe 6 and the joint body 1 better. In addition, in this embodiment, the first annular groove 21 and the second annular groove 22 are distributed at intervals along the axial direction of the receiving interface 11. A clamp 4 with a locking tooth 41 is installed in the second annular groove 22. The clamp 4 has one or two rows of locking teeth 41, which are arranged in a scale-like manner. When the locking part 2 is in the locked state, the locking teeth 41 of the clamp 4 are inserted into the outer wall of the pipe 6, making the connection between the pipe 6 and the pipe joint tighter.

[0021] The workflow of this embodiment is as follows: First, the pipe 6 is inserted into the corresponding socket 11 of the connector body 1. Then, the locking part 2 is fitted onto the socket 11 and locked. That is, two semi-rings 23 are installed on the socket 11, and the bolts 5 are passed through the bolt holes corresponding to the two semi-rings 23 and locked, so that the locking part 2 is in a locked state. The locking part 2 makes the first sealing ring 31 form a surface contact with the arc groove 111 and abut against the pipe 6. At the same time, the second sealing ring 32 is deformed by the compression of the inclined section 212. The inclined surface 321 of the second sealing ring 32 forms a surface contact with the inclined section 212, so that the second sealing ring 32 abuts against the pipe 6. Under the action of the locking part 2, the clamp teeth 41 of the clamp 4 are inserted into the outer wall of the pipe 6, thereby completing the connection between the pipe 6 and the connector body 1.

Claims

1. A pipe joint for gas, comprising a joint body (1) and a sealing ring (3), the joint body (1) is provided with at least two receiving interfaces (11) for inserting a pipe (6), a locking part (2) capable of connecting the joint body (1) and the pipe (6) is sleeved at the receiving interface (11), characterized in that: The end of the receiving port (11) extends outward in the circumferential direction to form an arc-shaped groove (111) corresponding to the sealing ring (3), part of the sealing ring (3) can be placed in the arc-shaped groove (111), the inner circumferential wall of the locking portion (2) is outwardly recessed to form a first annular groove (21), the first annular groove (21) includes a circular arc segment (211) corresponding to the arc-shaped groove (111) and a slope segment (212) that is inwardly contracted along the axial direction of the receiving port (11), in the locked state of the locking portion (2), the circular arc segment (211) drives the arc-shaped groove (111) to make part of the sealing ring (3) abut against the pipeline (6), and the slope segment (212) extrudes the sealing ring (3) to make the remaining sealing ring (3) abut against the pipeline (6).

2. The pipe joint for gas use according to claim 1, characterized by: The sealing ring (3) includes a first sealing ring (31) and a second sealing ring (32), the first sealing ring (31) is arranged in the arc-shaped groove (111) and located at the circular arc segment (211), and the second sealing ring (32) is arranged in the first annular groove (21) and located at the slope segment (212), and the second sealing ring (32) has a slope (321) corresponding to the slope segment (212).

3. The pipe joint for gas use according to claim 1, characterized by: The inner circumferential wall of the locking portion (2) is outwardly recessed to form a second annular groove (22), and a clamp (4) with a clamping tooth (41) is installed in the second annular groove (22), and in the locked state of the locking portion (2), the clamping tooth (41) of the clamp (4) penetrates into the outer wall of the pipeline (6).

4. The pipe joint for gas use according to claim 3, characterized in that: The first annular groove (21) and the second annular groove (22) are spaced apart along the axial direction of the receiving port (11).

5. The pipe joint for gas use according to claim 3, characterized in that: The clamp (4) is provided with at least two rows of clamping teeth (41), and the clamping teeth (41) are arranged in a staggered manner.

6. A pipe joint for gas pipes according to any one of claims 1 to 5, characterised in that: The locking portion (2) includes two opposite half-ring bodies (23), the two ends of the half-ring body (23) are provided with connecting ears (231), the connecting ears (231) are provided with bolt holes, and a bolt (5) penetrates through the corresponding bolt holes of the two half-ring bodies (23) to make the locking portion (2) in the locked state.

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