A sealing device for a gas pipeline connection

Abstract

The utility model discloses a kind of sealing devices for gas pipeline interface in gas device technical field, comprising: fixed pipe, the inner cavity both ends of fixed pipe are equipped with first sealing element and second sealing element, first sealing element and second sealing element are sequentially spaced in fixed pipe from inside to outside;The first sealing element includes annular supporting block being arranged in fixed pipe and annular sealing ring being arranged on annular supporting block;Annular groove is equipped in the fixed pipe, and the second sealing element includes annular sealing pad being arranged in annular groove;First sealing element and second sealing element are sequentially arranged in the inner cavity end portion of fixed pipe in the application, form double-layer sealing barrier, effectively enhance the sealing level at interface, and annular sealing pad is sleeved on the outer wall of the pipeline to be connected, and closely cooperate with the inner wall of fixed pipe, can effectively block the radial clearance between pipeline outer wall and interface inner cavity, prevent gas from leaking along outer wall, avoid gas leakage.

Description

Technical Field

[0001] This utility model relates to the field of gas devices, specifically to a sealing device for gas pipeline interfaces. Background Technology

[0002] As a widely used clean energy source, the safety of gas transmission systems is of paramount importance. When gas pipelines are installed, repaired, or connected to various gas-using devices (such as gas stoves, water heaters, pressure regulators, etc.), they usually need to be connected through interfaces. The sealing performance of these interfaces is directly related to the safe operation of the entire gas system.

[0003] Currently, most common gas pipeline interface sealing methods employ a single sealing structure, such as relying solely on rubber sealing rings, gaskets, or threaded sealing tape (e.g., PTFE tape) to achieve sealing. These traditional sealing methods have drawbacks: the sealing structure is singular, relying on only one sealing mechanism. During long-term use, factors such as material aging, permanent compression deformation, vibration loosening, or temperature changes can lead to a decline in sealing performance and reduce sealing reliability. Utility Model Content

[0004] The purpose of this invention is to provide a sealing device for gas pipeline interfaces, which solves the defects of existing sealing methods.

[0005] The present invention achieves the above objectives through the following technical solution: a sealing device for gas pipeline interfaces, comprising: a fixed pipe, wherein a first sealing element and a second sealing element are provided at both ends of the inner cavity of the fixed pipe, and the first sealing element and the second sealing element are arranged alternately from the inside to the outside in the fixed pipe; The first sealing element includes an annular support block disposed inside the fixed tube and an annular sealing ring disposed on the annular support block. The fixed tube has an annular groove, and the second sealing element includes an annular sealing gasket disposed in the annular groove.

[0006] Preferably, the annular sealing gasket is provided with a first annular air storage groove, and the fixed pipe is provided with an air inlet for communicating with the first annular air storage groove.

[0007] Preferably, the thickness of the annular sealing gasket is less than the depth of the annular groove.

[0008] Preferably, the outer radial direction of the annular sealing ring gradually decreases on the side away from the annular support block.

[0009] Preferably, the annular sealing ring is provided with a second annular gas storage groove, and the second annular gas storage groove is connected to the first annular gas storage groove through an airflow channel.

[0010] Preferably, the fixing pipe includes a corrugated pipe and two connecting pipes respectively disposed at both ends of the corrugated pipe.

[0011] The beneficial effects of this utility model are as follows: a first sealing element and a second sealing element are sequentially arranged at the inner end of the fixed pipe to form a double-layer sealing barrier, which effectively enhances the sealing level at the interface. Furthermore, the annular sealing gasket is fitted onto the outer wall of the pipe to be connected and fits tightly with the inner wall of the fixed pipe, which can effectively seal the radial gap between the outer wall of the pipe and the inner cavity of the interface, preventing gas leakage along the outer wall. At the same time, the annular sealing ring is set on the inner wall of the pipe to be connected and fits tightly with the end of the fixed pipe to form a seal on the inner wall side of the pipe, blocking the path of gas escaping from the inner wall side. The design of the inner and outer walls working together to seal achieves all-round sealing coverage of the interface area, avoids gas leakage, and improves the fault tolerance and operational stability of the system. Attached Figure Description

[0012] Figure 1 This is a schematic diagram of the sealing device for gas pipeline interfaces according to this utility model; Figure 2 This is a cross-sectional view of the fixed tube structure of this utility model; Figure 3 This utility model Figure 2 Enlarged schematic diagram of the structure at point A in the middle.

[0013] In the diagram: 1. Fixed pipe; 101. Corrugated pipe; 102. Connecting pipe; 2. Air inlet; 3. Annular sealing gasket; 4. Annular support block; 5. Annular sealing ring; 6. Annular groove; 7. First annular air storage groove; 8. Second annular air storage groove; 9. Airflow channel. Detailed Implementation

[0014] The present application will now be described in further detail with reference to the accompanying drawings. It should be noted that the following specific embodiments are only used to further illustrate the present application and should not be construed as limiting the scope of protection of the present application. Those skilled in the art can make some non-essential improvements and adjustments to the present application based on the above application content. Example

[0015] Please see Figure 1 and Figure 2 A sealing device for a gas pipeline interface includes: a fixed pipe 1, with a first sealing element and a second sealing element provided at both ends of the inner cavity of the fixed pipe 1, and the first sealing element and the second sealing element being arranged alternately from the inside to the outside in the inner cavity of the fixed pipe 1; The first sealing element includes an annular support block 4 and an annular sealing ring 5. The annular support block 4 is located in the inner cavity of the fixed pipe 1, and the annular sealing ring 5 is located on the side wall of the annular support block 4 facing the annular sealing gasket 3. The outer diameter of the annular sealing ring 5 is smaller than the outer diameter of the annular support block 4, that is, there is a gap between the outer wall of the annular sealing ring 5 and the inner wall of the fixed pipe 1. An annular groove 6 is provided on the inner wall of the fixed pipe 1. The second sealing element includes an annular sealing gasket 3, which is located in the inner cavity of the annular groove 6.

[0016] It should be noted that the two ends of the fixed pipe 1 are respectively fitted onto the outer walls of the two pipes that need to be connected (the two pipes need to be connected), so that the pipe ends are in contact with the outer wall of the annular support block 4, and the annular sealing ring 5 is in contact with the inner wall of the pipe, thus achieving a first sealing effect. At the same time, the annular sealing gasket 3 is fitted onto the outer wall of the pipe, thus achieving a second sealing effect.

[0017] In this embodiment, as a further optimization, please refer to... Figure 2 The inner cavity of the annular sealing gasket 3 is provided with a first annular air storage groove 7, and the outer wall of the fixed pipe 1 is provided with an air inlet 2, which is connected to the first annular air storage groove 7. Air is injected into the interior of the first annular air storage groove 7 through the air inlet 2, so that the annular sealing gasket 3 is inflated and expands, and fits tightly against the outer wall of the pipe, thereby increasing the sealing effect of the annular sealing gasket 3.

[0018] It should be noted that a valve is provided on the air inlet 2 to control the opening and closing of the air inlet 2.

[0019] In this embodiment, as a further optimization, please refer to... Figure 2 and Figure 3 The thickness of the annular sealing gasket 3 is less than the depth of the annular groove 6; this ensures that when the pipe is inserted into the fixed pipe 1, the pipe does not contact the annular sealing gasket 3, thus preventing the pipe from squeezing the annular sealing gasket 3 and causing it to deform, and preventing gaps from forming between the annular sealing gasket 3 and the pipe due to deformation, thereby ensuring the sealing effect of the annular sealing gasket 3.

[0020] In this embodiment, as a further optimization, please refer to... Figure 3 The outer radial direction of the annular sealing ring 5 gradually decreases on the side away from the annular support block 4, making it convenient to insert the pipe into the outer side of the annular sealing ring 5.

[0021] In this embodiment, as a further optimization, please refer to... Figure 3The annular sealing ring 5 has a second annular air storage groove 8 inside, which is connected to the first annular air storage groove 7 through the air flow channel 9. When air is injected into the first annular air storage groove 7 through the air inlet 2, some of the gas inside the first annular air storage groove 7 enters the second annular air storage groove 8 through the air flow channel 9, causing the annular sealing ring 5 to expand and ensure that the annular sealing ring 5 fits tightly with the inside of the pipe, thereby increasing the sealing performance of the annular sealing ring 5.

[0022] In this embodiment, as a further optimization, please refer to... Figure 3 The fixed pipe 1 includes a corrugated pipe 101 and two connecting pipes 102 respectively disposed at both ends of the corrugated pipe 101; the first sealing element and the second sealing element are installed in the connecting pipe 102, and the connecting pipe 102 is connected to the pipe to be connected. The corrugated pipe 101 can be bent, which plays a compensating role, so that when external force is applied to the pipe, the pressure between the pipe and the connecting pipe 102 is reduced, and the probability of deformation of the sealing area is reduced.

[0023] The above-described embodiments are merely illustrative of several implementations of this utility model, and while the descriptions are relatively specific and detailed, they should not be construed as limiting the scope of this utility model patent. It should be noted that those skilled in the art can make various modifications and improvements without departing from the concept of this utility model, and these modifications and improvements all fall within the protection scope of this utility model.

Claims

1. A sealing device for a gas pipeline interface, characterized in that: include: The fixed tube (1) has a first sealing element and a second sealing element at both ends of its inner cavity. The first sealing element and the second sealing element are arranged alternately from the inside to the outside inside the fixed tube (1). The first sealing element includes an annular support block (4) disposed inside the fixed tube (1) and an annular sealing ring (5) disposed on the annular support block (4). The fixed tube (1) is provided with an annular groove (6), and the second sealing element includes an annular sealing gasket (3) provided in the annular groove (6).

2. A sealing device for a gas pipeline interface according to claim 1, characterized in that, The annular sealing gasket (3) is provided with a first annular gas storage groove (7), and the fixed pipe (1) is provided with an air inlet (2) for communicating with the first annular gas storage groove (7).

3. A sealing device for a gas pipeline interface according to claim 2, characterized in that, The thickness of the annular sealing gasket (3) is less than the depth of the annular groove (6).

4. A sealing device for a gas pipeline interface according to claim 2, characterized in that, The outer radial direction of the annular sealing ring (5) gradually decreases on the side away from the annular support block (4).

5. A sealing device for a gas pipeline interface according to claim 4, characterized in that, The annular sealing ring (5) is provided with a second annular gas storage groove (8), and the second annular gas storage groove (8) is connected to the first annular gas storage groove (7) through the airflow channel (9).

6. A sealing device for a gas pipeline interface according to claim 1, characterized in that, The fixed pipe (1) includes a corrugated pipe (101) and two connecting pipes (102) respectively located at both ends of the corrugated pipe (101).

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