Gas switching valve

Abstract

The utility model relates to the technical field of gas valves, and particularly discloses a gas switching valve, which comprises a cylinder mechanism, a gas switching valve, a gas switching valve, a gas switching valve, a gas switching valve and a gas switching valve, and is characterized in that the cylinder mechanism comprises a cylinder body and a cylinder seat, and the cylinder body is connected with the cylinder seat; the air cylinder mechanism is connected with the valve body, a valve rod, a valve seat, a first valve plate and a reinforcing valve plate are arranged in the valve body, one end of the valve rod is connected with the telescopic rod, the reinforcing valve plate is connected with the other end of the valve rod, and the air cylinder mechanism drives the first valve plate to move in the valve body in a telescopic mode. The auxiliary sealing mechanism comprises an auxiliary sealing shell and an air pump, the auxiliary sealing shell is arranged at one end of the valve seat, a first air hole is formed between the auxiliary sealing shell and the valve seat, the air pump is connected with an air inlet of the auxiliary sealing shell, and the air pump outputs high-pressure air flow to the first air hole; the gas switching valve overcomes the defects that in the prior art, a large-size gas switching valve is insufficient in gas tightness and unstable in internal connection.

Description

Technical Field

[0001] This utility model relates to the field of gas valves, and in particular to a gas switching valve. Background Technology

[0002] A gas switching valve is a device used to control the direction and path of gas flow, and it is widely used in various industrial and scientific research fields.

[0003] In existing technologies, gas switching valves typically achieve sealing by using a cylinder to drive a sealing valve plate to press / release a valve seat. However, for large-diameter gas switching valves, relying solely on the fit between the sealing valve plate and the valve seat is insufficient to achieve a complete seal, potentially leading to gas leakage. This is because as component dimensions increase, machining precision decreases, and gaps may appear on the valve seat. Exhaust gas can then enter the switching valve through these gaps, resulting in limited airtightness. Therefore, such gas switching valves can only be applied to scenarios involving small-diameter valve seats and small-volume exhaust gas treatment. Utility Model Content

[0004] (a) Technical problems to be solved

[0005] The problem to be solved by this utility model is to provide a gas switching valve to overcome the defects of insufficient air tightness and unstable internal connection of the large-sized gas switching valve in the prior art.

[0006] (II) Technical Solution

[0007] To solve the aforementioned technical problem, this utility model provides a gas switching valve, comprising:

[0008] A cylinder mechanism, comprising a cylinder body and a cylinder seat, wherein the cylinder body is connected to the cylinder seat, and a telescopic rod is located at the center of the cylinder mechanism;

[0009] The valve body is connected to the cylinder mechanism. The valve body is provided with a valve stem, a valve seat, a first valve plate, and a reinforcing valve plate. One end of the valve stem is connected to the telescopic rod. The valve seat is located at the bottom end of the valve body. The reinforcing valve plate is connected to the first valve plate and the other end of the valve stem. The cylinder mechanism drives the first valve plate to telescopically move inside the valve body.

[0010] An auxiliary sealing mechanism is provided, comprising an auxiliary sealing housing and an air pump. The auxiliary sealing housing is disposed at one end of the valve seat, and a first air hole is formed between the auxiliary sealing housing and the valve seat. The air pump is connected to the air inlet of the auxiliary sealing housing and outputs high-pressure airflow through the first air hole.

[0011] As described above, the gas switching valve may optionally include a lifting ring connected to the valve body via a nut.

[0012] As described above, the gas switching valve may optionally include a solenoid valve connected to the cylinder seat, which controls the extension and retraction of the telescopic rod.

[0013] As described above for the gas switching valve, optionally, a proximity switch is provided on the cylinder seat.

[0014] As described above, the gas switching valve may optionally have a pressure cap on both the telescopic rod and the valve stem, and an airtight ring between the two pressure caps.

[0015] As described above, the gas switching valve may optionally have an air passage between the airtight rings, the air passage being connected to the outer end of the cylinder seat, and an airtight interface being provided on the air passage. When the telescopic rod is connected to the valve stem, high-pressure gas enters from the airtight interface, and the high-pressure gas seals the gap between the telescopic rod and the valve stem.

[0016] (III) Beneficial Effects

[0017] The gas switching valve provided by this utility model has the following beneficial effects:

[0018] (1) This utility model uses an air pump in the auxiliary sealing mechanism to transmit high-pressure airflow to the auxiliary sealing housing. The high-pressure airflow flows out from the first air hole. When the gas switching valve with a larger inner diameter is closed, there is a gap on the valve seat because the valve seat has a larger diameter. The high-pressure airflow fills the gap, and the low-pressure exhaust gas cannot pass through the gap filled by the high-pressure airflow, thereby improving the sealing effect.

[0019] (2) This utility model provides a pressure cap on the telescopic rod and the valve rod, and an airtight ring between the two pressure caps. By injecting high-pressure airflow into the airtight ring from the airtight interface and the air passage, the gap between the telescopic rod and the valve rod is sealed, thereby improving the sealing performance and connection stability. Attached Figure Description

[0020] To more clearly illustrate the technical solutions of the embodiments of this application, the drawings used in the embodiments will be briefly introduced below. Obviously, the drawings described below are only some embodiments of this application. For those skilled in the art, other drawings can be obtained based on these drawings without creative effort.

[0021] Figure 1 This is a partial cross-sectional view of a gas switching valve according to the present invention;

[0022] Figure 2 for Figure 1 A partial schematic diagram of A in the middle;

[0023] Figure 3 for Figure 1 A partial schematic diagram of B in the diagram.

[0024] The component names corresponding to the various reference numerals in the figure are as follows: 1. Cylinder mechanism; 11. Cylinder body; 12. Cylinder seat; 13. Telescopic rod; 2. Valve body; 21. Valve stem; 22. Valve seat; 23. First valve plate; 24. Reinforcing valve plate; 3. Auxiliary sealing mechanism; 31. Auxiliary sealing housing; 32. Air pump; 33. First air hole; 34. Air inlet; 4. Lifting ring; 5. Solenoid valve; 51. Proximity switch; 6. Pressure cap; 61. Airtight ring; 62. Air passage; 63. Airtight interface. Detailed Implementation

[0025] The present application will now be described in detail with reference to the accompanying drawings and specific embodiments.

[0026] The following specific examples illustrate the implementation of this application. Those skilled in the art can easily understand other advantages and effects of this application from the content disclosed in this specification. Obviously, the described embodiments are only a part of the embodiments of this application, and not all of them. This application can also be implemented or applied through other different specific embodiments, and the details in this specification can also be modified or changed based on different viewpoints and applications without departing from the spirit of this application. It should be noted that, in the absence of conflict, the following embodiments and features in the embodiments can be combined with each other. Based on the embodiments in this application, all other embodiments obtained by those skilled in the art without creative effort are within the scope of protection of this application.

[0027] It should be noted that various aspects of embodiments within the scope of the appended claims are described below. It will be apparent that the aspects described herein can be embodied in a wide variety of forms, and any particular structure and / or function described herein is merely illustrative. Based on this application, those skilled in the art will understand that one aspect described herein can be implemented independently of any other aspect, and two or more of these aspects can be combined in various ways. For example, any number and aspects set forth herein can be used to implement the device and / or practice the method. Additionally, this device and / or method can be implemented using structures and / or functionalities other than one or more of the aspects set forth herein.

[0028] It should also be noted that the illustrations provided in the following embodiments are only schematic representations of the basic concept of this application. The drawings only show the components related to this application and are not drawn according to the actual number, shape and size of the components in the actual implementation. In the actual implementation, the form, quantity and proportion of each component can be arbitrarily changed, and the layout of the components may also be more complex.

[0029] Additionally, specific details are provided in the following description to facilitate a thorough understanding of the examples. However, those skilled in the art will understand that practice can be carried out without these specific details.

[0030] The technical solutions provided by the various embodiments of this application are described below with reference to the accompanying drawings.

[0031] See Figures 1 to 3 This utility model provides a gas switching valve, including a cylinder mechanism 1, a valve body 2, and an auxiliary sealing mechanism 3. The cylinder mechanism 1 is connected to the valve body 2 and provides power for opening / closing the valve body 2. The auxiliary sealing mechanism 3 is used to provide higher sealing performance for closing the valve body 2, thereby further preventing gas leakage.

[0032] Furthermore, the cylinder mechanism 1 includes a cylinder body 11 and a cylinder seat 12, the cylinder body 11 and the cylinder seat 12 are connected, and the cylinder mechanism 1 has a telescopic rod 13 at its center.

[0033] Furthermore, a solenoid valve 5 is connected to the cylinder seat 12, and the solenoid valve 5 controls the extension and retraction of the telescopic rod 13. The operator can control the extension and retraction of the telescopic rod 13 through the solenoid valve 5.

[0034] Furthermore, a proximity switch 51 is provided on the cylinder base 12.

[0035] exist Figures 1 to 3 In an optional embodiment, the cylinder mechanism 1 is connected to the valve body 2. The valve body 2 is provided with a valve stem 21, a valve seat 22, a first valve plate 23, and a reinforcing valve plate 24. One end of the valve stem 21 is connected to the telescopic rod 13. The valve seat 22 is located at the bottom end of the valve body 2. The reinforcing valve plate 24 is connected to the first valve plate 23. The reinforcing valve plate 24 is connected to the other end of the valve stem 21. The cylinder mechanism 1 drives the first valve plate 23 to move telescopically inside the valve body 2.

[0036] Specifically, the valve body 2 can be opened / closed by the movement of the first valve plate 23. Meanwhile, the reinforced valve plate 24 further improves the sealing performance. When the inner diameter of the valve seat 22 is small, the reinforced valve plate 24 can seal the valve seat 22 with a smaller inner diameter; when the inner diameter of the valve seat 22 is large, the first valve plate 23 can seal the valve seat 22 with a larger inner diameter. Furthermore, the reinforced valve plate 24 can also improve the deformation performance of the first valve plate 23.

[0037] Furthermore, both the telescopic rod 13 and the valve stem 21 are provided with pressure caps 6, and an airtight ring 61 is provided between the two pressure caps 6.

[0038] Furthermore, there is an air passage 62 between the airtight rings 61, which is connected to the outer end of the cylinder seat 12. An airtight interface 63 is provided on the air passage 62. When the telescopic rod 13 is connected to the valve stem 21, high-pressure gas enters from the airtight interface 63 and seals the gap between the telescopic rod 13 and the valve stem 21.

[0039] exist Figures 1 to 3 In an optional embodiment, the auxiliary sealing mechanism 3 includes an auxiliary sealing housing 31 and an air pump 32. The auxiliary sealing housing 31 is disposed at one end of the valve seat 22, and a first air hole 33 is formed between the auxiliary sealing housing 31 and the valve seat 22. The air pump 32 is connected to the air inlet 34 of the auxiliary sealing housing 31, and the air pump 32 outputs high-pressure airflow at the first air hole 33.

[0040] It should be noted that the high-pressure airflow ejected by the auxiliary sealing mechanism 3 can fill the gap between the valve seat 22 and the first valve plate 23, while the exhaust gas, especially VOCs exhaust gas, has a lower pressure and cannot pass through the gap filled by the high-pressure airflow, thereby improving the sealing effect.

[0041] Furthermore, the gas switching valve includes a lifting ring 4, which is connected to the valve body 2 via a nut. Operators can conveniently transport / assemble / disassemble this invention using the lifting ring 4.

[0042] The specific steps of the gas switching valve of this utility model are as follows:

[0043] The air pump 32 in the auxiliary sealing mechanism 3 transmits high-pressure airflow to the auxiliary sealing housing 31. The high-pressure airflow flows out from the first air hole 33. When the gas switching valve with a larger inner diameter is closed, there is a gap in the valve seat 22 because the valve seat 22 has a larger diameter. The high-pressure airflow fills the gap, and the low-pressure VOCs exhaust gas cannot pass through the gap filled by the high-pressure airflow, thereby improving the sealing effect.

[0044] By providing pressure caps 6 on the telescopic rod 13 and valve stem 21, and an airtight ring 61 between the two pressure caps 6, high-pressure airflow is injected into the airtight ring 61 from the airtight interface 63 and the air passage 62, thereby sealing the gap between the telescopic rod 13 and valve stem 21, improving sealing performance and connection stability.

[0045] The same or similar parts between the various embodiments in this specification can be referred to mutually. Each embodiment focuses on describing the differences from other embodiments.

[0046] The above description is merely a specific embodiment of this application, but the scope of protection of this application is not limited thereto. Any variations or substitutions that can be easily conceived by those skilled in the art within the technical scope disclosed in this application should be included within the scope of protection of this application. Therefore, the scope of protection of this application should be determined by the scope of the claims.

Claims

1. A gas switching valve, characterized in that, include: A cylinder mechanism (1) includes a cylinder body (11) and a cylinder seat (12), the cylinder body (11) is connected to the cylinder seat (12), and a telescopic rod (13) is located at the center of the cylinder mechanism (1). A valve body (2) is provided, and the cylinder mechanism (1) is connected to the valve body (2). The valve body (2) is provided with a valve stem (21), a valve seat (22), a first valve plate (23), and a reinforcing valve plate (24). One end of the valve stem (21) is connected to the telescopic rod (13). The valve seat (22) is located at the bottom end of the valve body (2). The reinforcing valve plate (24) is connected to the first valve plate (23). The reinforcing valve plate (24) is connected to the other end of the valve stem (21). The cylinder mechanism (1) drives the first valve plate (23) to move telescopically inside the valve body (2). An auxiliary sealing mechanism (3) is provided, comprising an auxiliary sealing housing (31) and an air pump (32). The auxiliary sealing housing (31) is disposed at one end of the valve seat (22). A first air hole (33) is formed between the auxiliary sealing housing (31) and the valve seat (22). The air pump (32) is connected to the air inlet (34) of the auxiliary sealing housing (31). The air pump (32) outputs high-pressure airflow at the first air hole (33).

2. The gas switching valve as described in claim 1, characterized in that, The gas switching valve includes a lifting ring (4), which is connected to the valve body (2) by a nut.

3. The gas switching valve as described in claim 1, characterized in that, A solenoid valve (5) is connected to the cylinder seat (12), and the solenoid valve (5) controls the extension and retraction of the telescopic rod (13).

4. The gas switching valve as described in claim 1, characterized in that, A proximity switch (51) is provided on the cylinder seat (12).

5. The gas switching valve as described in claim 1, characterized in that, Both the telescopic rod (13) and the valve stem (21) are provided with pressure caps (6), and an airtight ring (61) is provided between the two pressure caps (6).

6. The gas switching valve as described in claim 5, characterized in that, There is an air passage (62) between the airtight rings (61), the air passage (62) is connected to the outer end of the cylinder seat (12), and an airtight interface (63) is provided on the air passage (62). When the telescopic rod (13) is connected to the valve stem (21), high-pressure gas enters from the airtight interface (63) and the high-pressure gas seals the gap between the telescopic rod (13) and the valve stem (21).

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