Gas leakage-proof self-closing valve with multiple sealing structure

Abstract

The utility model relates to a self -closing valve technical field, concretely is a kind of gas leakproof self -closing valve with multiple sealing structure, including valve body, the valve body includes air inlet channel and along the core stem of air inlet channel movement, the core stem coaxial and have gas pipe, the gas pipe is separated into air inlet area and air outlet area by baffle, several through -holes are set up on baffle, the core stem passes through baffle and with baffle sliding seal, the core stem coaxial sleeve joint has located the baffle of air inlet area, baffle is fixedly provided with sealing rod, when self -closing valve ventilation, sealing rod separates through -hole and in self -closing valve closure, baffle and baffle adhere to and sealing rod seals through -hole.The use of the application, on the basis of original sealing mechanism, utilize core stem to drive sealing plate to realize sealing and through simultaneously, utilize baffle and sealing rod to realize two seals, form double seal, effectively avoid the safety accident caused by the sealing failure of valve body self -sealing.

Description

Technical Field

[0001] This utility model belongs to the field of self-closing valve technology, specifically a gas leak-proof self-closing valve with multiple sealing structures. Background Technology

[0002] A gas shut-off valve is an important safety device installed at the end of a residential gas pipeline and connected to the stove. Its core function is to automatically cut off the gas supply when abnormal gas pipeline pressure occurs (such as overpressure, underpressure, or overcurrent), thereby effectively preventing gas leaks and protecting the lives and property of users.

[0003] Currently, most gas self-closing valves on the market rely on a core rod that moves along the gas inlet pipe of the valve body for their opening and closing function. Under normal operating conditions, the drive mechanism (such as a magnetic element or electromagnetic device) keeps the core rod in the open position, causing the sealing plate fixed to its end to move away from the valve port, allowing gas to pass through. When an abnormal pressure is detected, the drive mechanism releases the core rod, which moves towards the valve port under the action of a return spring and other components, ultimately pressing the sealing plate against the valve port to achieve a seal.

[0004] However, the aforementioned existing technology has a significant drawback and safety hazard: its sealing structure is too simplistic, relying solely on a single main seal formed between the sealing plate and the valve port. This single-seal structure faces severe challenges in practical use. First, the sealing surface of the sealing plate or valve port is prone to wear, scratches, or deformation under long-term opening and closing friction, media erosion, or impurity corrosion, leading to a poor seal. Once this sole seal fails, gas will continuously leak, which users often cannot detect, easily causing serious accidents such as fires, explosions, or poisoning, and its safety cannot be fully guaranteed. Utility Model Content

[0005] This invention provides a gas leak-proof self-closing valve with a multi-seal structure to overcome the defects in the prior art.

[0006] This utility model is achieved through the following technical solution: A gas leak-proof self-closing valve with a multi-seal structure includes a valve body. The valve body includes an air inlet channel and a core rod that moves along the air inlet channel. The core rod is coaxial and covered by a gas delivery pipe. The gas delivery pipe is located inside the air inlet channel and is sealed to the air inlet channel. The gas delivery pipe is divided into an air inlet area and an air outlet area by a partition. Several through holes are provided on the partition. The core rod passes through the partition and slides and seals with the partition. A baffle plate located in the air inlet area is coaxially sleeved on the core rod. A sealing rod is fixedly installed on the baffle plate. When the self-closing valve is vented, the sealing rod disengages from the through holes. When the self-closing valve is closed, the baffle plate is in contact with the partition plate and the sealing rod seals the through holes.

[0007] In this application, the opening and closing of the self-closing valve is controlled by the movement of the core rod, which is existing technology. The core rod is open when it faces the air inlet and closed when it moves away from the air inlet, which will not be described in detail. When the core rod moves open when it faces the air inlet, the sealing rod disengages from the through hole, so the gas can pass through the baffle plate and through the through hole in the gas pipeline to achieve flow. When closed, the core rod moves in the opposite direction to drive the sealing rod to seal the through hole, so that the partition forms a closed structure. Combined with the seal built into the valve body, a double seal is formed, which can effectively avoid safety accidents caused by the failure of the seal built into the valve body.

[0008] Preferably, an air outlet is provided outward in the air inlet area, and an external connecting pipe is installed inside the air outlet. The external connecting pipe extends out of the valve body and is connected to a pressure gauge. A branch pipe is also connected to the external connecting pipe, and the branch pipe is controlled by a valve. The pressure gauge can measure the air pressure between the sealing plate and the partition plate, so that the leakage can be reported through the pressure gauge. The valve can realize partial pressure relief and avoid further damage to the sealing element caused by excessive pressure.

[0009] Preferably, the sealing rod has a tapered structure that is wider on the outside and narrower on the inside, and the through hole is adapted to the sealing rod, thereby achieving a better sealing effect.

[0010] Preferably, the partition plate has a through hole, and a sealing ring is fixedly fitted along the inner wall of the through hole. The core rod passes through the sealing ring and slides and seals with the sealing ring.

[0011] Preferably, the through holes are arranged in a circular array along the partition.

[0012] Preferably, the side of the baffle facing the air intake is a spherical surface that bulges towards the air intake, which can reduce the obstruction of the baffle to the gas and allow the gas to disperse better.

[0013] The beneficial effects of this utility model are as follows: The use of this application can achieve sealing and passage by using the core rod to drive the sealing plate on the basis of the original sealing mechanism, while using the partition plate and sealing rod to achieve a second seal, forming a double seal, which can effectively avoid safety accidents caused by the failure of the valve body's own seal. Attached Figure Description

[0014] To more clearly illustrate the technical solutions in the embodiments of this utility model or the prior art, the drawings used in the description of the embodiments or the prior art will be briefly introduced below. Obviously, the drawings described below are some embodiments of this utility model. For those skilled in the art, other drawings can be obtained based on these drawings without creative effort.

[0015] Figure 1 This is a schematic diagram of the structure of this utility model; Figure 2This is a schematic diagram of the gas pipeline when gas flows through; Figure 3 This is a schematic diagram of the gas delivery pipe when it is closed.

[0016] As shown in the figure: 1. Valve body, 2. Gas supply pipe, 3. Core rod, 4. Baffle plate, 5. Baffle plate, 6. Sealing rod, 7. External pipe, 8. Pressure gauge, 9. Branch pipe, 10. Sealing ring, 11. Spherical surface. Detailed Implementation

[0017] To make the objectives, technical solutions, and advantages of the embodiments of this utility model clearer, the technical solutions of the embodiments of this utility model will be clearly and completely described below with reference to the accompanying drawings. Obviously, the described embodiments are only some embodiments of this utility model, not all embodiments. Based on the embodiments of this utility model, all other embodiments obtained by those skilled in the art without creative effort are within the protection scope of this utility model.

[0018] A gas leak-proof self-closing valve with a multi-seal structure, such as Figures 1-3 As shown. The valve includes a valve body 1, which comprises an air intake channel and a core rod 3 that moves along the air intake channel. The core rod 3 is coaxial and fitted with an air supply pipe 2. The air supply pipe 2 is located inside the air intake channel and is sealed to it. The air supply pipe 2 is divided into an air intake zone and an air outlet zone by a partition 4. The partition 4 has several through holes arranged in a circular array. A through hole is provided on the partition 4, and a sealing ring 10 is fixedly fitted along its inner wall. The core rod 3 passes through the sealing ring 10 and slides in a seal with it. A baffle plate 5 located in the air intake zone is coaxially fitted to the core rod 3. A sealing rod 6 is fixedly installed on the baffle plate 5. When the self-closing valve is open, the sealing rod 6 disengages from the through hole; when the self-closing valve is closed, the baffle plate 5 is in contact with the partition plate 4, and the sealing rod 6 seals the through hole.

[0019] In this application, the opening and closing of the self-closing valve is controlled by the movement of the core rod 3, which is existing technology. The core rod 3 is open when facing the air inlet and closed when moving away from the air inlet. In the attached drawings, it is open to the left and closed to the right, which will not be described in detail. When the core rod 3 moves towards the air inlet and is open, the sealing rod 6 disengages from the through hole, so the gas can pass through the baffle plate 5 and through the through hole in the gas transmission pipe 2 to achieve circulation. When closed, the core rod 3 moves in the opposite direction to drive the sealing rod 6 to seal the through hole, so that the partition plate 4 forms a closed structure. Combined with the seal of the valve body 1, a double seal is formed, which can effectively avoid safety accidents caused by the failure of the seal of the valve body 1.

[0020] An air outlet is provided outward in the air intake area, and an external connecting pipe 7 is installed inside the air outlet. The external connecting pipe 7 extends out of the valve body 1 and is connected to a pressure gauge 8. A branch pipe 9 is also connected to the external connecting pipe 7, and the branch pipe 9 is controlled by a valve. The pressure gauge 8 can measure the air pressure between the sealing plate and the partition plate 4, so that the leakage can be reported through the pressure gauge 8. The valve can partially relieve pressure and prevent further damage to the sealing element caused by excessive pressure.

[0021] The sealing rod 6 has a tapered structure that is wider on the outside and narrower on the inside. The through hole is adapted to the sealing rod 6, thereby achieving a better sealing effect.

[0022] The side of the baffle plate 5 facing the air intake is a spherical surface 11 that protrudes towards the air intake side, which can reduce the obstruction of the baffle plate 5 to the gas and allow the gas to disperse better.

[0023] The use of this application can achieve sealing and passage by using the core rod 3 to drive the sealing plate on the basis of the original sealing mechanism, while using the partition plate 4 and the sealing rod 6 to achieve a second seal, forming a double seal, which can effectively avoid safety accidents caused by the failure of the seal of the valve body 1.

[0024] Finally, it should be noted that the above embodiments are only used to illustrate the technical solutions of this utility model, and not to limit it. Although this utility model has been described in detail with reference to the foregoing embodiments, those skilled in the art should understand that modifications can still be made to the technical solutions described in the foregoing embodiments, or equivalent substitutions can be made to some of the technical features. Such modifications or substitutions do not cause the essence of the corresponding technical solutions to deviate from the spirit and scope of the technical solutions of the embodiments of this utility model.

Claims

1. A gas leak-proof self-closing valve with a multi-seal structure, characterized in that: The valve includes a valve body, which comprises an air intake channel and a core rod that moves along the air intake channel. The core rod is coaxial and covered by an air supply pipe. The air supply pipe is located inside the air intake channel and is sealed to the air intake channel. The air supply pipe is divided into an air intake area and an air outlet area by a partition. Several through holes are provided on the partition. The core rod passes through the partition and slides and seals with the partition. A baffle plate located in the air intake area is coaxially sleeved on the core rod. A sealing rod is fixedly installed on the baffle plate. When the self-closing valve is venting, the sealing rod disengages from the through holes. When the self-closing valve is closed, the baffle plate is in contact with the partition plate and the sealing rod seals the through holes.

2. The gas leak-proof self-closing valve with a multi-seal structure according to claim 1, characterized in that: An air outlet is provided in the air intake area, and an external connecting pipe is installed in the air outlet. The external connecting pipe extends out of the valve body and is connected to a pressure gauge. A branch pipe is also connected to the external connecting pipe, and the branch pipe is controlled by a valve.

3. The gas leak-proof self-closing valve with a multi-seal structure according to claim 2, characterized in that: The sealing rod has a tapered structure that is wider on the outside and narrower on the inside, and the through hole is adapted to the sealing rod.

4. The gas leak-proof self-closing valve with a multi-seal structure according to claim 3, characterized in that: The partition plate has a through hole, and a sealing ring is fixedly fitted along the inner wall of the through hole. The core rod passes through the sealing ring and slides and seals with the sealing ring.

5. The gas leak-proof self-closing valve with a multi-sealing structure according to claim 1, characterized in that: The through holes are arranged in a circular array on the partition.

6. The gas leak-proof self-closing valve with a multi-sealing structure according to claim 1, characterized in that: The side of the baffle plate facing the air intake is a spherical surface that bulges towards the air intake.

Images