A shut-off valve with double seal

Abstract

The utility model discloses a kind of shut-off valves with double sealing valve, including valve body, the one end of the valve body is provided with air inlet channel, the side of the valve body is provided with at least two with air inlet channel intercommunication air outlet channel, adjacent air outlet channel is connected by sealing channel, the switching valve stem is inserted in the sealing channel and is arranged axially, the end face sealing element that the switching valve stem is set with cooperates with the end face of sealing channel and is sealed and the sealing ring that sealing channel inner side wall is contacted, when the end face sealing element and sealing ring are separated from sealing channel with the switching valve stem axial movement to open sealing channel, the effect of double sealing can be played by the combination of end face sealing element and sealing ring, even if residual metal scrap or foreign matter on end face sealing element also can not cause the sealing failure of sealing channel.

Description

Technical Field

[0001] This utility model relates to the field of gas shut-off valve technology, specifically a shut-off valve with a double-sealed valve. Background Technology

[0002] Shut-off valves are a common component in gas systems. Modern shut-off valves have a valve stem between the inlet channel and multiple outlet channels. The valve stem is equipped with a seal to switch between different outlet channels. Existing valves only have one rubber gasket seal. In actual use, when the valve is pressed down to open or released to close, a small amount of metal shavings or foreign objects left over from valve body manufacturing may adhere to the surface of the rubber gasket, causing valve seal leakage and posing a safety risk. Utility Model Content

[0003] This invention provides a shut-off valve with a double-sealed valve, which can solve the problem of leakage caused by the unreliable sealing of a single rubber gasket on the valve stem of existing shut-off valves.

[0004] To achieve the above objectives, this utility model provides the following technical solution: a shut-off valve with a double-sealed valve, comprising a valve body, an air inlet channel at one end of the valve body, and at least two air outlet channels connected to the air inlet channel on the side of the valve body. Adjacent air outlet channels are connected by a sealing channel. A switching valve stem is axially inserted into the sealing channel. The switching valve stem is fitted with an end face seal that seals with one end face of the sealing channel and a sealing ring that contacts the inner sidewall of the sealing channel. When the switching valve stem moves axially, the end face seal and the sealing ring disengage from the sealing channel to open the sealing channel. By combining the end face seal and the sealing ring, a double sealing effect can be achieved. Even if metal debris or foreign matter remains on the end face seal, the sealing performance of the sealing channel will not fail.

[0005] Preferably, the sealing ring is installed near the end face seal, and the sealing ring and the end face seal form a combined seal. When the valve stem moves, the sealing ring and the end face seal can be separated from the sealing channel together, reducing the stroke of the valve stem.

[0006] Preferably, a gasket is axially installed on the side of the end face seal away from the sealing channel to support the end face seal. The gasket ensures the rigidity of the end face seal and prevents leakage due to large deformation of the end face seal.

[0007] Preferably, a protrusion is provided on one end face of the sealing channel. The protrusion contacts the end face seal. The protrusion can reduce the contact area between the end face of the sealing channel and the end face seal, and reduce the impact of residual metal debris or foreign matter on the sealing performance of the end face seal.

[0008] Preferably, a limiting ring is installed on the outside of the switching valve stem to limit the sealing ring, preventing displacement between the sealing ring and the switching valve stem and ensuring the sealing effect.

[0009] Preferably, the end of the switching valve stem extends to the outer side of the other end of the valve body, and a spring is provided between the outer side of the switching valve stem and the valve body. The spring keeps the end face seal in a sealed state with the end face of the sealing channel. The spring can improve the sealing effect and also facilitate the opening of the switching valve stem.

[0010] Preferably, a button is installed at the end of the switching valve stem to facilitate operation of the switching valve stem.

[0011] Preferably, the sealing ring is an O-ring.

[0012] Compared with the prior art, the beneficial effects of this utility model are:

[0013] With a simple structure, the combination of end face seal and sealing ring can achieve a double sealing effect. The sealing ring is hidden inside the sealing channel, which can effectively avoid the adhesion of metal debris or foreign objects, greatly reducing the risk of valve leakage. Even if metal debris or foreign objects remain on the end face seal, it will not cause the sealing channel to fail, thus greatly improving safety. Attached Figure Description

[0014] Figure 1 This is a front sectional view of the present invention;

[0015] Figure 2 for Figure 1 Enlarged structural diagram at point A.

[0016] Figure label:

[0017] 1. Valve body; 11. Limiting ring; 12. Protrusion; 13. Gasket; 2. Inlet passage; 3. Outlet passage; 5. Sealing passage; 6. Spring; 7. Switching valve stem; 8. Button; 9. End face seal; 10. Sealing ring. Detailed Implementation

[0018] The technical solutions of the present invention will be clearly and completely described below with reference to the accompanying drawings of the embodiments of the present invention.

[0019] To address the issue of unreliable sealing of a single rubber gasket on the valve stem of existing shut-off valves, leading to leakage, such as... Figure 1-2As shown, the following technical solution is provided: a shut-off valve with a double-sealed valve, comprising a valve body 1, an air inlet channel 2 provided at one end of the valve body 1, and at least two air outlet channels 3 connected to the air inlet channel 2 provided on the side of the valve body 1. Adjacent air outlet channels 3 are connected by a sealing channel 5. A switching valve stem 7 is axially inserted into the sealing channel 5. The switching valve stem 7 is fitted with an end face seal 9 that seals with one end face of the sealing channel 5 and a sealing ring 10 that contacts the inner sidewall of the sealing channel 5. When the switching valve stem 7 moves axially, the end face seal 9 and the sealing ring 10 disengage from the sealing channel 5 to open the sealing channel 5. By combining the end face seal 9 with the sealing ring 10, a double sealing effect can be achieved. Even if metal debris or foreign matter remains on the end face seal 9, the sealing performance of the sealing channel 5 will not fail.

[0020] Specifically, there can be two exhaust channels 3, which are arranged side by side on one side of the valve body 1, namely the first exhaust channel 31 and the second exhaust channel 32. The sealing channel 5 is arranged between the first exhaust channel 31 and the second exhaust channel 32. The first exhaust channel 31 is directly connected to the intake channel 2. When the sealing channel 5 is closed, the gas entering the intake channel 2 can be directly discharged from the first exhaust channel 31. When the sealing channel 5 is open, the gas entering the intake channel 2 can be discharged from both the first exhaust channel 31 and the second exhaust channel 32 at the same time.

[0021] In this embodiment, the end of the switching valve stem 7 extends to the outer side of the other end of the valve body 1. A spring 6 is provided between the outer side of the switching valve stem 7 and the valve body 1. The spring 6 keeps the end face seal 9 in a sealed state with the end face of the sealing channel 5. The spring 6 can improve the sealing effect and facilitate the opening of the switching valve stem 7. At the same time, a button 8 is installed at the end of the switching valve stem 7 for easy operation. When the button 8 and the switching valve stem 7 are pressed, the sealing channel 5 can be opened. After being released, the switching valve stem 7 will automatically reset under the action of the spring 6 to close the sealing channel 5. The sealing ring 10 can be an O-ring or a sealing ring with other cross-sections, such as X-shaped, elliptical, etc.

[0022] In this embodiment, the sealing ring 10 is installed near the end face seal 9. The sealing ring 10 and the end face seal 9 form a combined seal. When the switching valve stem 7 moves, the sealing ring 10 and the end face seal 9 can disengage from the sealing channel 5 together, reducing the stroke of the switching valve stem 7. The sealing ring 10 and the end face seal 9 can be tightly attached. When the end face seal 9 achieves end face sealing, the sealing ring 10 is located inside the sealing channel 5 near the end face. In this way, when the switching valve stem 7 moves, the contact friction distance between the sealing ring 10 and the sealing channel 5 is relatively small, reducing wear and ensuring sealing performance.

[0023] In this embodiment, as Figure 2 As shown, a gasket 13 is axially installed on the side of the end face seal 9 away from the sealing channel 5 to support the end face seal 9. The gasket 13 ensures the rigidity of the end face seal 9 and prevents leakage due to large deformation of the end face seal 9. At the same time, a ring of protrusions 12 is provided on one end face of the sealing channel 5. The protrusions 12 contact the end face seal 9. The protrusions 12 can reduce the contact area between the end face of the sealing channel 5 and the end face seal 9, reducing the impact of residual metal debris or foreign objects on the sealing performance of the end face seal 9. The tip of the protrusions 12 can be pointed, so that a line seal is formed between the protrusions 12 and the end face seal 9, resulting in a good sealing effect.

[0024] In this embodiment, a limiting ring 11 is installed on the outside of the switching valve stem 7 to limit the sealing ring 10, preventing displacement between the sealing ring 10 and the switching valve stem 7 and ensuring the sealing effect.

[0025] It should be noted that all directional indicators (such as up, down, left, right, front, back, etc.) in this utility model embodiment are only used to explain the relative positional relationship and movement of each component in a certain specific posture (as shown in the figure). If the specific posture changes, the directional indicator will also change accordingly.

[0026] Furthermore, in this utility model, the use of terms such as "first," "second," etc., is for descriptive purposes only and should not be construed as indicating or implying their relative importance or implicitly specifying the number of technical features indicated. Therefore, a feature defined as "first" or "second" may explicitly or implicitly include at least one of that feature. In the description of this utility model, "multiple" means at least two, such as two, three, etc., unless otherwise explicitly and specifically defined.

[0027] In this utility model, unless otherwise explicitly specified and limited, the terms "connection," "fixing," etc., should be interpreted broadly. For example, "fixing" can mean a fixed connection, a detachable connection, or an integral part; it can mean a mechanical connection or an electrical connection; it can mean a direct connection or an indirect connection through an intermediate medium; it can mean the internal communication of two components or the interaction between two components, unless otherwise explicitly limited. Those skilled in the art can understand the specific meaning of the above terms in this utility model according to the specific circumstances.

[0028] Furthermore, the technical solutions of the various embodiments of this utility model can be combined with each other, but only if they are based on the ability of those skilled in the art to implement them. When the combination of technical solutions is contradictory or cannot be implemented, it should be considered that such combination of technical solutions does not exist and is not within the scope of protection claimed by this utility model.

Claims

1. A shut-off valve with a double-sealed valve, comprising a valve body (1), wherein one end of the valve body (1) is provided with an air inlet channel (2), and the side of the valve body (1) is provided with at least two air outlet channels (3) communicating with the air inlet channel (2), adjacent air outlet channels (3) being connected to each other through a sealing channel (5), wherein a switching valve stem (7) is axially inserted into the sealing channel (5), characterized in that, The switching valve stem (7) is fitted with an end face seal (9) that seals one end face of the sealing channel (5) and a sealing ring (10) that contacts the inner wall of the sealing channel (5). When the switching valve stem (7) moves axially, the end face seal (9) and the sealing ring (10) disengage from the sealing channel (5) to open the sealing channel (5).

2. The shut-off valve with a double-sealing valve according to claim 1, characterized in that: The sealing ring (10) is installed near the end face seal (9).

3. The shut-off valve with a double-sealing valve according to claim 2, characterized in that: The end face seal (9) is axially mounted with a gasket (13) on the side away from the sealing channel (5) to support the end face seal (9).

4. The shut-off valve with a double-sealing valve according to claim 1, characterized in that: A protrusion (12) is provided on one end face of the sealing channel (5), and the protrusion (12) is in contact with the end face seal (9).

5. The shut-off valve with a double-sealing valve according to claim 2, characterized in that: The outer side of the switching valve stem (7) is fitted with a limiting ring (11) to limit the sealing ring (10).

6. The shut-off valve with a double-sealed valve according to any one of claims 1-5, characterized in that: The end of the switching valve stem (7) extends to the other side of the valve body (1). A spring (6) is provided between the outer side of the switching valve stem (7) and the valve body (1). The spring (6) keeps the end face seal (9) sealed with the end face of the sealing channel (5).

7. The shut-off valve with a double-sealed valve according to claim 6, characterized in that: A button (8) is installed at the end of the switching valve stem (7).

8. The shut-off valve with a double-sealed valve according to claim 1, characterized in that: The sealing ring (10) is an O-ring.

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