CN215891271U - Pneumatic control valve - Google Patents
Pneumatic control valve Download PDFInfo
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- CN215891271U CN215891271U CN202121223665.0U CN202121223665U CN215891271U CN 215891271 U CN215891271 U CN 215891271U CN 202121223665 U CN202121223665 U CN 202121223665U CN 215891271 U CN215891271 U CN 215891271U
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Abstract
The utility model relates to a pneumatic control valve, which comprises a tubular valve cavity; the top end of the valve cavity is provided with a spring, and the valve cavity is also provided with a working gas inlet and a working gas outlet; a piston capable of sliding up and down is arranged in the valve cavity, and the head of the piston is in contact with the spring; the piston includes a cylindrical head and a tail with an annular recess therebetween. The bottom of the valve cavity is provided with a control gas pressurizing port for introducing control gas for pressurizing and a control gas pressure relief port for releasing gas, and the piston is pushed to move up and down in the valve cavity by adding gas with preset pressure and released gas to open and close the valve. Compared with the prior art, the pneumatic control valve has the characteristics of simple structure, small volume, no electromagnetic interference and capability of normally working in a strong magnetic field environment such as Tokamak.
Description
Technical Field
The utility model relates to a pneumatic control valve, in particular to a gas valve device used in fusion devices and other environments with strong magnetic fields.
Background
In the field of fusion devices, valves are widely used as important components for controlling injected gas, the main control valves used in the field of fusion at present are all electromagnetic control valves, and the valves cannot work normally due to the fact that a very large magnetic field exists inside the fusion device. At present, all electromagnetic valves are installed outside a fusion device, so that gas injection has a large time delay.
SUMMERY OF THE UTILITY MODEL
The utility model provides a pneumatic control valve device, which solves the problem that the conventional electromagnetic valve cannot normally work in a high-intensity magnetic field environment inside a fusion device.
The technical scheme of the utility model is as follows: a pneumatic control valve comprises a tubular valve cavity; the top end in the valve cavity is provided with a spring, and the valve cavity is also provided with a working gas inlet and a working gas outlet; a piston capable of sliding up and down is arranged in the valve cavity, and the head of the piston is in contact with the spring;
the piston includes a cylindrical head and a tail with an annular recess therebetween.
The bottom of the valve cavity is provided with a control gas pressurizing port for introducing control gas for pressurizing and a control gas pressure relief port for releasing gas, and the piston is pushed to move up and down in the valve cavity by adding gas with preset pressure and released gas to open and close the valve.
Further, a sealing baffle is arranged in the valve cavity, and a sealing glue layer is arranged on the sealing baffle; when the bottom of the valve cavity is under normal pressure, the spring is in a first state, the spring is pre-compressed, the annular boss on the lower side of the piston head is in close contact with the sealing baffle arranged in the valve cavity, the contact position of the piston and the sealing baffle of the valve cavity is a sealing position, and a sealing glue layer on the sealing baffle guarantees vacuum sealing, so that the valve is in a closed state.
Furthermore, a piston limiting baffle is arranged in the valve cavity and arranged between two edges of the groove of the piston, so that the situation that when the valve is opened, the spring is excessively compressed by control pressure to cause damage to the spring is prevented, and the service life of the valve is prolonged.
Further, a control gas pressurizing port and a control gas pressure relief port are respectively arranged at the bottom of the valve cavity, the control gas pressurizing port and the control gas pressure relief port are respectively connected with a high-pressure gas source and a low-pressure gas source, control gas is introduced into the bottom of the valve cavity through control, and the opening and closing of the pneumatic control valve are controlled through controlling the pressure of the control gas; the closing pressure range of the pneumatic control valve is lower than 3 atmospheric pressures; the opening pressure of the pneumatic control valve is greater than 5 atmospheric pressures, and the pressure of the valve control cavity is guaranteed to push the piston to move the compression spring to a position above the working gas outlet under the condition of the opening pressure.
Further, the closing pressure and the opening pressure are varied by varying the spring properties.
Furthermore, the control gas and the working gas adopt the same gas source, so that the pollution of the working gas caused by the gas at the control end in the valve cavity entering the working end in the opening process of the valve is prevented.
Further, the high-pressure gas source is a gas source with pressure higher than 5 atmospheres, and the low-pressure gas source is a gas source with pressure lower than 3 atmospheres.
Has the advantages that:
the utility model adopts the mode of controlling the piston to move by gas to control the opening and closing of the valve, is not interfered by an electromagnetic field, and can be used in complicated electromagnetic environments such as a strong magnetic field and the like. The control gas and the working gas adopt the same gas source, so that the pollution of the working gas caused by the fact that the control gas enters the working gas cavity body due to the fact that sealing is not in place in the moving process of the piston can be avoided.
Drawings
FIG. 1 is a schematic view of the present invention in a valve closed state;
fig. 2 is a schematic view of the present invention in a valve open state.
In the figure: the gas compressor comprises a spring 1, a working gas outlet 2, a sealing baffle 3, a working gas inlet 4, a piston 5, a piston limiting baffle 6, a control gas pressurization port 7 and a control gas pressure relief port 8.
Detailed Description
The technical solutions in the embodiments of the present invention will be described clearly and completely with reference to the accompanying drawings in the embodiments of the present invention, and it is obvious that the described embodiments are only a part of the embodiments of the present invention, rather than all embodiments, and all other embodiments obtained by a person skilled in the art based on the embodiments of the present invention belong to the protection scope of the present invention without creative efforts.
According to an embodiment of the present invention, as shown in fig. 1, there is provided a pneumatic control valve including a tubular valve chamber; the top end in the valve cavity is provided with a spring 1, and the valve cavity is also provided with a working gas inlet 4 and a working gas outlet 2; a piston 5 capable of sliding up and down is arranged in the valve cavity, and the head of the piston is in contact with the spring 1;
the piston 5 comprises a cylindrical head and a tail with an annular recess therebetween.
The bottom of the valve cavity is provided with a control gas pressurizing port 7 for introducing control gas for pressurizing and a control gas pressure relief port 8 for releasing gas, and the piston is pushed to move up and down in the valve cavity by adding gas with preset pressure and released gas to open and close the valve.
A sealing baffle 3 is also arranged in the valve cavity, and a sealing glue layer is arranged on the sealing baffle 3; when the bottom of the valve cavity is under normal pressure, the spring is in a first state, the spring is pre-compressed, the annular boss on the lower side of the piston head is in close contact with the sealing baffle arranged in the valve cavity, the contact position of the piston and the sealing baffle of the valve cavity is a sealing position, and a sealing glue layer on the sealing baffle guarantees vacuum sealing, so that the valve is in a closed state.
According to the embodiment of the utility model, as shown in fig. 1, the lower part of the valve controls the opening of the air pressure relief opening 8, the air pressure of the cavity is lower than the opening pressure, the spring 1 compresses the piston 5, the piston 5 is in contact with the sealing baffle 3 in the cavity, the vacuum sealing state of the sealing position of the valve is ensured, at the moment, the working gas inlet 4 and the working gas outlet 2 of the valve are in a disconnected state, and the valve is in a closed state.
When the control gas pressurizing port 7 of the valve is filled with high-pressure gas, the high-pressure gas drives the piston 5 to move to compress the spring 1 until the piston limiting baffle 6 is contacted, the head part of the spring is positioned above the position of the working gas outlet 2, the working gas inlet 4 and the working gas outlet 2 of the valve are in a communicated state, and the valve is opened. In order to ensure that the control gas enters the working gas cavity to pollute the working gas in the opening process of the valve, the control gas and the working gas adopt the same gas in the use process of the valve, so that the control gas does not pollute the working gas even if the control gas enters the working gas cavity.
If the valve needs to be closed again, the pressurization of the control part of the valve cavity through the pressurization port for controlling the gas is stopped, and meanwhile, the high-pressure gas in the control cavity is quickly discharged through the control gas pressure relief port 8, so that the aim of quickly closing the valve is fulfilled. During the operation of the valve, the pressure of the valve control cavity is continuously switched to achieve the purpose of rapidly switching the opening and closing states of the valve.
Although illustrative embodiments of the present invention have been described above to facilitate the understanding of the present invention by those skilled in the art, it should be understood that the present invention is not limited to the scope of the embodiments, but various changes may be apparent to those skilled in the art, and it is intended that all inventive concepts utilizing the inventive concepts set forth herein be protected without departing from the spirit and scope of the present invention as defined and limited by the appended claims.
Claims (7)
1. A pneumatic control valve, its characterized in that: comprises a tubular valve cavity; the top end in the valve cavity is provided with a spring, and the valve cavity is also provided with a working gas inlet and a working gas outlet; a piston capable of sliding up and down is arranged in the valve cavity, and the head of the piston is in contact with the spring;
the piston comprises a cylindrical head part and a cylindrical tail part, and an annular groove is formed between the head part and the tail part;
the bottom of the valve cavity is provided with a control gas pressurizing port for introducing control gas for pressurizing and a control gas pressure relief port for releasing gas, and the piston is pushed to move up and down in the valve cavity by adding gas with preset pressure and released gas to open and close the valve.
2. A pneumatically controlled valve according to claim 1, wherein: a sealing baffle is also arranged in the valve cavity, and a sealing glue layer is arranged on the sealing baffle; when the bottom of the valve cavity is under normal pressure, the spring is in a first state, the spring is pre-compressed, the annular boss on the lower side of the piston head is in close contact with the sealing baffle arranged in the valve cavity, the contact position of the piston and the sealing baffle of the valve cavity is a sealing position, and a sealing glue layer on the sealing baffle guarantees vacuum sealing, so that the valve is in a closed state.
3. A pneumatically controlled valve according to claim 1, wherein: be equipped with piston limit baffle in the valve cavity, shown piston limit baffle sets up the position between two borders of recess of piston, prevents when the valve is opened, and control pressure excessively compresses the spring, leads to the spring to damage, extension valve life.
4. A pneumatically controlled valve according to claim 1, wherein: the bottom of the valve cavity is respectively provided with a control gas pressurizing port and a control gas pressure relief port, the control gas pressurizing port and the control gas pressure relief port are respectively connected with a high-pressure gas source and a low-pressure gas source, the control gas is introduced into the bottom of the valve cavity through control, and the opening and closing of the pneumatic control valve are controlled through controlling the pressure of the control gas; the closing pressure range of the pneumatic control valve is lower than 3 atmospheric pressures; the opening pressure of the pneumatic control valve is greater than 5 atmospheric pressures, and the pressure of the valve control cavity is guaranteed to push the piston to move the compression spring to a position above the working gas outlet under the condition of the opening pressure.
5. A pneumatically controlled valve according to claim 1, wherein: the closing pressure and the opening pressure are varied by varying the spring properties.
6. A pneumatically controlled valve according to claim 1, wherein: the control gas and the working gas adopt the same gas source to prevent the pollution of the working gas caused by the gas at the control end in the valve cavity entering the working end in the opening process of the valve.
7. A pneumatically controlled valve according to claim 4, wherein: the high-pressure air source is an air source with the pressure higher than 5 atmospheric pressures, and the low-pressure air source is an air source with the pressure lower than 3 atmospheric pressures.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202121223665.0U CN215891271U (en) | 2021-06-02 | 2021-06-02 | Pneumatic control valve |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202121223665.0U CN215891271U (en) | 2021-06-02 | 2021-06-02 | Pneumatic control valve |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN215891271U true CN215891271U (en) | 2022-02-22 |
Family
ID=80345971
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN202121223665.0U Active CN215891271U (en) | 2021-06-02 | 2021-06-02 | Pneumatic control valve |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN215891271U (en) |
-
2021
- 2021-06-02 CN CN202121223665.0U patent/CN215891271U/en active Active
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