Gas pipe fitting with self-sealing connection

Abstract

This invention discloses a gas pipe fitting with a self-sealing connection structure, relating to the field of gas pipe fittings. Addressing the problem of poor installation and gas leakage in existing small-diameter gas pipes during threaded connections due to the lack of industry standards for the use of necessary auxiliary sealing materials such as PTFE tape and sealant, the invention proposes the following solution: It includes a first pipe, with a second pipe at one end. The first pipe has a first hole along its axial direction, and the second pipe has a second hole along its axial direction. Sealing grooves are formed around the inner walls of the first and second pipes at their adjacent ends, within the first and second holes. This invention features a novel structure and effectively solves the problem of poor installation and gas leakage in existing small-diameter gas pipes during threaded connections due to the lack of industry standards for the use of necessary auxiliary sealing materials such as PTFE tape and sealant.

Description

Technical Field

[0001] This invention relates to the field of gas pipe fittings, and more particularly to a gas pipe fitting with a self-sealing connection structure. Background Technology

[0002] Natural gas needs to be transported through gas pipelines. Different types of gas pipelines are required for different environments, specifically in terms of pipe diameter, material, and installation method. Installation method is particularly important. Main gas pipelines or long-distance gas transmission pipelines are mostly connected by welding. However, indoor connections are limited by the relatively small operating space, the high risk of electric welding or open flame operations, and the thin walls of small-diameter gas pipelines. Therefore, other connection structures are necessary. Currently, indoor gas pipelines are mainly installed using threaded connections, supplemented by Teflon tape or sealant for sealing. However, this sealing method is limited by the operator's skill level. For example, there is no unified standard for the number of turns or thickness of Teflon tape, and similarly, there are no industry standards for the dosage and coverage area of ​​sealant. This often leads to gas leaks due to poor pipeline connections, creating safety hazards and wasting significant time, manpower, and resources in subsequent fault detection and repair. Therefore, to solve these problems, we propose a gas pipe fitting with a self-sealing connection structure. Summary of the Invention

[0003] The present invention proposes a gas pipe fitting with a self-sealing connection structure, which solves the problems of poor installation and gas leakage caused by the lack of industry standards for the use of necessary auxiliary sealing materials such as PTFE tape and sealant in the threaded connection of existing small-diameter gas pipelines.

[0004] To achieve the above objectives, the present invention adopts the following technical solution:

[0005] A gas pipe fitting with a self-sealing connection structure includes a first pipe, a second pipe at one end of the first pipe, a first pipe hole along its axial direction of the first pipe, a second pipe hole along its axial direction of the second pipe, sealing grooves along the inner walls of the first pipe and the second pipe at their adjacent ends, a first sealing ring fitted inside the first pipe hole, and a second sealing ring fitted inside the second pipe hole of the second pipe, and a connecting pipe between the first pipe and the second pipe, wherein a first sealing ring is fixedly fitted on the outer peripheral wall of the connecting pipe at the end closest to the first pipe, and a second sealing ring is sealed on the outer peripheral wall of the connecting pipe at the end furthest from the first sealing ring.

[0006] In a preferred embodiment of the present invention, both the first sealing ring and the second sealing ring are fitted together with the sealing groove.

[0007] In a preferred embodiment of the present invention, the outer circumferential wall of the adapter pipe is threaded, and a first nut is fitted onto the end of the adapter pipe near the first pipe, and a second nut is fitted onto the end of the adapter pipe near the second pipe. The first nut and the second nut are both threadedly connected to the adapter pipe, and the first nut and the second nut are both located between the first sealing ring and the second sealing ring.

[0008] In a preferred embodiment of the present invention, a spring is provided between the first nut and the second nut, and the adapter tube is slidably sleeved within the spring.

[0009] In a preferred embodiment of the present invention, the first sealing ring and the second sealing ring are respectively provided with a first conical hole and a second conical hole at their two ends that are close to each other, and the conical contraction directions of the first conical hole and the second conical hole are far apart from each other.

[0010] In a preferred embodiment of the present invention, the two ends of the adapter pipe are inserted into the first sealing ring and the second sealing ring through the first tapered hole and the second tapered hole.

[0011] In a preferred embodiment of the present invention, the adapter pipe has a circular hole along its axial direction, and the circular hole penetrates the adapter pipe.

[0012] In a preferred embodiment of the present invention, the first pipe and the second pipe, the first sealing ring and the second sealing ring, the first nut and the second nut are all symmetrically distributed about the adapter pipe.

[0013] The beneficial effects of this invention are as follows:

[0014] 1. This device uses a special insertion structure between the sealing ring and the conical hole of the sealing ring, combined with a traditional threaded locking structure. The locking torque can be precisely set by a torque wrench, enabling the device to achieve reliable sealing performance.

[0015] 2. The device uses a threaded adapter and a spring between the two nuts, so that the two ends of the spring act on the first nut and the second nut respectively, which can keep the first nut and the second nut from becoming loose.

[0016] 3. The device uses a spring to provide anti-loosening effect for the nut, and the nut provides sealing and locking force for the sealing ring and sealing ring. The structure is interlocking and compact, and no auxiliary materials such as glue or Teflon tape are needed during assembly, making the operation process more standardized and reliable.

[0017] In summary, this device effectively solves the problems of poor installation and gas leakage caused by the lack of industry standards for the use of necessary auxiliary sealing materials such as PTFE tape and sealant in threaded connections of existing small-diameter gas pipelines. Attached Figure Description

[0018] Figure 1 This is a schematic diagram of the external structure of the present invention.

[0019] Figure 2 This is an exploded view of the assembly structure of the present invention.

[0020] Figure 3 This is a cross-sectional view of the assembly structure of the present invention.

[0021] Figure 4 This is a cross-sectional view of the first and second pipes of the assembly structure of the present invention.

[0022] Figure 5 This is an exploded cross-sectional view of the first pipe section of the assembly structure of the present invention.

[0023] Labels in the diagram: 1. First pipe; 2. First sealing ring; 201. Second sealing ring; 3. First pipe hole; 301. Second pipe hole; 4. Sealing groove; 5. First tapered hole; 501. Second tapered hole; 6. Adaptor pipe; 7. Thread; 8. First sealing ring; 801. Second sealing ring; 9. Round hole; 10. First nut; 11. Second nut; 12. Spring; 13. Second pipe. Detailed Implementation

[0024] To make the technical means, creative features, objectives and effects of this invention easier to understand, the invention will be further described below in conjunction with specific embodiments.

[0025] In the description of this invention, it should be understood that the terms "upper", "lower", "front", "rear", "left", "right", "top", "bottom", "inner", "outer", etc., indicate the orientation or positional relationship based on the orientation or positional relationship shown in the accompanying drawings. They are only for the convenience of describing this invention and simplifying the description, and do not indicate or imply that the device or element referred to must have a specific orientation, or be constructed and operated in a specific orientation. Therefore, they should not be construed as limitations on this invention.

[0026] In the description of this invention, it should be noted that, unless otherwise explicitly specified and limited, the terms "installation," "connection," and "setting" should be interpreted broadly. For example, they can refer to fixed connection or setting, detachable connection or setting, or integral connection or setting. The model numbers of the electrical appliances provided in this invention are for reference only. Those skilled in the art can replace different models of electrical appliances with the same function according to actual usage. Those skilled in the art can understand the specific meaning of the above terms in this invention based on the specific circumstances.

[0027] Reference Figure 1-5 A gas pipe fitting with a self-sealing connection structure includes a first pipe 1, a second pipe 13 at one end of the first pipe 1, a first pipe hole 3 along its axial direction of the first pipe 1, and a second pipe hole 301 along its axial direction of the second pipe 13. Sealing grooves 4 are formed around the inner walls of the first pipe 1 and the second pipe 13 at their adjacent ends within the first pipe hole 3 and the second pipe hole 301. A first sealing ring 2 is fitted inside the first pipe 1 within the first pipe hole 3, and a second sealing ring 2 is fitted inside the second pipe hole 301. A second sealing ring 201 is fitted inside the pipe hole 301. A connecting pipe 6 is provided between the first pipe 1 and the second pipe 13. A first sealing ring 8 is fixedly fitted onto the outer peripheral wall of the connecting pipe 6 near the first pipe 1, and a second sealing ring 801 is fitted onto the outer peripheral wall of the connecting pipe 6 away from the first sealing ring 8. The first sealing ring 201 and the second sealing ring 201 are both fitted into the sealing groove 4. The outer circumference of the connecting pipe 6 is threaded with a thread 7, and the first sealing ring 801 is fitted onto the outer peripheral wall of the connecting pipe 6 near the first pipe 1. A nut 10 is provided, and a second nut 11 is fitted onto the end of the adapter pipe 6 near the second pipe 13. Both the first nut 10 and the second nut 11 are threadedly connected to the adapter pipe 6 via threads 7. The first nut 10 and the second nut 11 are both located between the first sealing ring 8 and the second sealing ring 801. A spring 12 is matched between the first nut 10 and the second nut 11, and the adapter pipe 6 is slidably fitted into the spring 12. The two ends of the first sealing ring 2 and the second sealing ring 201 that are close to each other are respectively provided with first cones. The first conical hole 5 and the second conical hole 501 are arranged in a tapered direction that is far apart from each other. The two ends of the adapter pipe 6 are inserted into the first sealing ring 2 and the second sealing ring 201 through the first conical hole 5 and the second conical hole 501. The adapter pipe 6 has a circular hole 9 along its axial direction, and the circular hole 9 passes through the adapter pipe 6. The first pipe 1 and the second pipe 13, the first sealing ring 2 and the second sealing ring 201, the first nut 10 and the second nut 11 are all symmetrically distributed about the adapter pipe 6.

[0028] Example: Figure 1 , Figure 2 , Figure 3 , Figure 4 and Figure 5 For ease of diagramming, both the first pipe 1 and the second pipe 13 are shown as truncated. In reality, the two ends of the first pipe 1 and the second pipe 13 should be completely symmetrical.

[0029] The main purpose of this device is to achieve a rapid (no need to add sealing materials) and durable reliable connection between two sets of gas pipelines. The operation procedure is as follows: First, the first sealing ring 2 is fitted onto the inner wall of the first pipeline 1 through the sealing groove 4, and a gentle rotation is performed to check whether the first sealing ring 2 and the sealing groove 4 are properly assembled, ensuring that the opening direction of the first conical hole 5 of the first sealing ring 2 is outward. Similarly, the second sealing ring 201 is assembled into the second pipeline 13. The adapter pipe 6, the first sealing ring 8, the second sealing ring 801, the spring 12, and the first nut 10 and the second nut 11 of this device need to be pre-assembled together during production. The first sealing ring 8 and the second sealing ring 801 are tightly connected to the adapter pipe 6 by injection molding. Using tools, the first nut 10 and the second nut 11 are then inserted into the middle of the adapter pipe 6. The spring 12 is compressed in the middle of the adapter pipe 6 by rotating the adapter pipe 6. The end of the adapter pipe 6 with the first sealing ring 8 is squeezed through the first conical hole 5 and through the first sealing ring 2. Similarly, the second sealing ring 801 at the other end of the adapter pipe 6 is squeezed through the second sealing ring 201. The first nut 10 is then rotated toward the first pipe 1 and a torque wrench is used to reach the specified torque value range. At this time, the tightening of the first nut 10 causes the first sealing ring 8 to exert a compressive force on the first sealing ring 2, thereby achieving a sealing effect. Similarly, the second nut 11 is tightened toward the second pipe 13. The installation is now complete. At this time, the two ends of the spring 12 still act on the first nut 10 and the second nut 11 respectively, which can keep the first nut 10 and the second nut 11 from loosening, thereby making the sealing performance of the structure reliable for a long time.

[0030] The foregoing has shown and described the basic principles, main features, and advantages of the present invention. It will be apparent to those skilled in the art that the invention is not limited to the details of the exemplary embodiments described above, and that the invention can be implemented in other specific forms without departing from its spirit or essential characteristics. Therefore, the embodiments should be considered illustrative and non-limiting in all respects, and the scope of the invention is defined by the appended claims rather than the foregoing description. Thus, all variations falling within the meaning and scope of equivalents of the claims are intended to be included within the scope of the invention. No reference numerals in the claims should be construed as limiting the scope of the claims.

[0031] Furthermore, it should be understood that although this specification describes embodiments, not every embodiment contains only one independent technical solution. This narrative style is merely for clarity. Those skilled in the art should consider the specification as a whole, and the technical solutions in each embodiment can also be appropriately combined to form other embodiments that can be understood by those skilled in the art.

Claims

1. A gas pipe fitting with a self-sealing connection structure, comprising a first pipe (1), characterized in that, A second pipe (13) is provided at one end of the first pipe (1), and a first pipe hole (3) is opened along its axial direction of the first pipe (1), and a second pipe hole (301) is opened along its axial direction of the second pipe (13). Sealing grooves (4) are opened around the inner walls of the first pipe (1) and the second pipe (13) at their close ends. A first sealing ring (2) is sleeved in the first pipe hole (3) of the first pipe (1), and a second sealing ring (201) is sleeved in the second pipe hole (301) of the second pipe (13). A connecting pipe (6) is provided between the first pipe (1) and the second pipe (13). A first sealing ring (8) is fixedly sleeved on the outer peripheral wall of the connecting pipe (6) at the end close to the first pipe (1), and a second sealing ring (801) is sealed on the outer peripheral wall of the connecting pipe (6) away from the first sealing ring (8). The first sealing ring (2) and the second sealing ring (201) are both fitted together with the sealing groove (4); The outer circumferential wall of the adapter pipe (6) is provided with threads (7), and the adapter pipe (6) is fitted with a first nut (10) at the end near the first pipe (1), and a second nut (11) is fitted at the end near the second pipe (13). The first nut (10) and the second nut (11) are both threadedly connected to the adapter pipe (6) through the threads (7), and the first nut (10) and the second nut (11) are both located between the first sealing ring (8) and the second sealing ring (801). A spring (12) is matched between the first nut (10) and the second nut (11), and the adapter pipe (6) is slidably sleeved in the spring (12); The first sealing ring (2) and the second sealing ring (201) are respectively provided with a first conical hole (5) and a second conical hole (501) at their two ends that are close to each other, and the conical contraction directions of the first conical hole (5) and the second conical hole (501) are far apart from each other; The two ends of the adapter pipe (6) are inserted into the first sealing ring (2) and the second sealing ring (201) through the first conical hole (5) and the second conical hole (501).

2. A gas pipe fitting with a self-sealing connection structure according to claim 1, characterized in that, The adapter pipe (6) has a circular hole (9) along its axial direction, and the circular hole (9) passes through the adapter pipe (6).

3. A gas pipe fitting with a self-sealing connection structure according to claim 1, characterized in that, The first pipe (1) and the second pipe (13), the first sealing ring (2) and the second sealing ring (201), the first nut (10) and the second nut (11) are all symmetrically distributed about the adapter pipe (6).

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