A self-sustaining cryogenic pneumatic valve

Abstract

The present invention discloses a self-sustaining low-temperature pneumatic valve. The valve body is provided with a pre-cooling take-over nozzle and a control take-over nozzle respectively and connected at both ends of the valve body, and a meson inlet and a meson outlet are respectively provided on both sides of the valve body. A valve core is provided in the valve body, and the control take-over nozzle inputs control gas to drive the valve core to slide up and down in the valve body, and controls the opening and closing of the meson inlet, the meson outlet, and the flow channel of the pre-cooling take-over nozzle. When the control take-over nozzle does not pass the control gas, the meson inlet and the meson outlet are disconnected, and the valve core and the valve body form a metal conical sealing pair. When the control take-over nozzle inputs the control gas, the meson inlet and the meson outlet are connected, and the valve core and the pre-cooling take-over nozzle form a metal conical sealing pair. When the control take-over nozzle is de-aired, the meson inlet and the meson outlet are connected by relying on the medium force, and the valve core and the pre-cooling nozzle form a metal conical sealing pair. In this way, when the air pressure in the control chamber is insufficient or the air supply pipeline is damaged, the valve can be maintained open by relying on the medium force, so that the system can work normally.

Description

Technical Field

[0001] The invention belongs to the technical field of valves and is used for controlling the flow of mesons, in particular to a self-sustaining low-temperature pneumatic valve. Background Art

[0002] A pneumatic valve is a valve driven by compressed air and consists of an actuator and a regulating mechanism. The actuator is the thrust component of the regulating valve, generating thrust according to the magnitude of the control signal pressure, driving the regulating mechanism. The valve body is the regulating component of the pneumatic regulating valve, directly contacting the regulating medium to regulate the flow of the fluid. Traditional pneumatic valves are normally closed or normally open pneumatic control valves. The valve opens or closes when the system is operating. When gas is supplied to the control chamber, the piston pushes the valve core to overcome the force of the inlet medium pressure, spring force, and friction, causing the valve to open or close. When the control pressure is removed, the force of the medium pressure and the spring force push the valve core to quickly return to the closed or open position. In actual use, if the control chamber air pressure is insufficient or the air supply line is damaged, the valve will quickly close or open, causing the system to stop working. Therefore, a self-sustaining low-temperature pneumatic valve is needed to solve the problems existing in the existing technology. Summary of the Invention

[0003] The object of the present invention is to provide a self-sustaining low-temperature pneumatic valve to solve the problem in the prior art that the pneumatic valve cannot be used when the air pressure in the control chamber is insufficient and the air supply pipeline is damaged.

[0004] In order to solve the above technical problems, the technical solution adopted by the present invention is: a self-sustaining low-temperature pneumatic valve, including a valve body, a pre-cooling take-over nozzle and a control take-over nozzle are respectively provided at both ends of the valve body, a meson inlet and a meson outlet are respectively provided on both sides of the valve body, the meson inlet flow channel and the meson outlet flow channel located inside the valve body are arranged up and down, a valve core is provided in the valve body and is slidably connected, the control take-over nozzle inputs gas to drive the valve core to slide up and down in the valve body, and controls the opening and closing between the meson inlet, the meson outlet and the pre-cooling take-over nozzle flow channels.

[0005] A piston is provided in the valve body and is slidably connected. The upper end of the valve core is connected to the piston. A spring is sleeved on the valve core. The two ends of the spring are respectively connected to the piston and the valve body. The control nozzle inputs gas to drive the piston, spring and valve core to slide up and down in the valve body.

[0006] A sealing ring is sleeved on the pre-cooling pipe nozzle, and the outer edge of the sealing ring is in contact with the inner wall of the valve body.

[0007] A sealing ring is sleeved on the upper end of the valve body, and the inner wall of the control nozzle is in contact with the sealing ring.

[0008] A sealing ring is sleeved on the piston, and the outer edge of the sealing ring is in contact with the inner wall of the valve body.

[0009] A sealing ring is provided in the valve body, and the valve core passes through the sealing ring.

[0010] Compared with the prior art, the present invention has the following advantages:

[0011] When the throttle is closed, the throttle body is opened, and the throttle body is opened, so that the throttle body is opened, and the throttle body is opened, and the throttle body is opened. When the throttle body is opened, the throttle body is opened, and the throttle body is opened, the throttle body is opened, and the throttle body is opened. When the throttle body is opened, the throttle body is opened, and the throttle body is opened. When the throttle body is opened, the throttle body is opened, and the throttle body is opened, the throttle body is opened, and the throttle body is opened. When the throttle body is opened, the throttle body is opened, and the throttle body is opened, the throttle body is opened, and the throttle body is opened. When the throttle body is opened, the throttle body is opened, and the throttle body is opened, the throttle body is opened, and the throttle body is opened. BRIEF DESCRIPTION OF THE DRAWINGS

[0012] Figure 1 Schematic diagram of the pneumatic valve of the present invention;

[0013] Figure 2 Schematic diagram of the valve body of the present invention;

[0014] Figure 3 It is a schematic diagram of the valve core of the present invention;

[0015] Figure 4 This is a schematic diagram of the pre-cooling nozzle of the present invention;

[0016] Figure 5 The pneumatic valve of the present invention works as shown in FIG. Figure 1 ;

[0017] Figure 6 The pneumatic valve of the present invention works as shown in FIG. Figure 2 .

[0018] In the figure: 1 piston, 2 valve body, 3 valve core, 4 pre-cooling nozzle, 5 sealing ring, 6 spring, 7 control nozzle. DETAILED DESCRIPTION

[0019] The technical solutions in the embodiments of the present invention will be clearly and completely described below in conjunction with the drawings in the embodiments of the present invention. Obviously, the described embodiments are only part of the embodiments of the present invention, rather than all the embodiments.

[0020] like Figure 1 As shown, a self-sustaining low-temperature pneumatic valve includes a valve body 2, and a pre-cooling take-over nozzle 4 and a control take-over nozzle 7 are respectively provided at both ends of the valve body 2. A meson inlet and a meson outlet are respectively provided on both sides of the valve body 2. The meson inlet flow channel and the meson outlet flow channel inside the valve body 2 are arranged up and down. A valve core 3 is provided in the valve body 2 and is slidably connected. The control take-over nozzle 7 inputs gas to drive the valve core 3 to slide up and down in the valve body 2 and control the opening and closing of the meson inlet, meson outlet and pre-cooling take-over nozzle 4 flow channels; when the control take-over nozzle 7 does not pass the control gas, the meson The inlet and the meson outlet are disconnected, and the valve core 3 and the valve body 2 form a metal conical sealing pair. When the control gas is input into the control takeover nozzle 7, the meson inlet and the meson outlet are connected, and the valve core 3 and the pre-cooling takeover nozzle 4 form a metal conical sealing pair. When the control takeover nozzle 7 is degassed, the meson inlet and the meson outlet are connected by relying on the medium force, and the valve core 3 and the pre-cooling nozzle 4 form a metal conical sealing pair, so that when the control chamber is degassed, the valve can be maintained open by relying on the medium force, and further, when the control chamber air pressure is insufficient or the air supply pipeline is damaged, the valve can be maintained open by relying on the medium force, so that the system can work normally.

[0021] like Figure 2 、 Figure 3 and Figure 4As shown, in this embodiment, the valve body 2 is rectangular and the valve core 3 is cylindrical; during actual installation, a pre-cooling nozzle 4 is provided at the lower end of the valve body 2, and the cold nozzle 4 is threadedly connected to the valve body 2. A sealing ring 5 is sleeved on the pre-cooling nozzle 4, and the outer edge of the sealing ring 5 fits with the inner wall of the valve body 4; a meson inlet and a meson outlet are provided on both sides of the valve body 2, and the meson inlet flow channel and the meson outlet flow channel inside the valve body 2 are arranged up and down, and the flow channel of the pre-cooling nozzle 4 is connected with the flow channels of the meson inlet and the meson outlet respectively, and the valve body 2 is provided with a control take-over nozzle 7 at the upper end, a sealing ring 5 is provided on the valve body 2, the inner wall of the control take-over nozzle 7 is fitted with the sealing ring 7, the control take-over nozzle 7 is threadedly connected to the valve body 2, a valve core 3 is provided in the valve body 2, the valve core 3 is connected to the valve body 2 for sliding up and down, a piston 1 is provided at the upper end of the valve core 3, a sealing ring 5 is provided on the piston 1, the outer edge of the sealing ring 5 is fitted with the inner wall of the valve body 2, the valve core 3 is threadedly connected to the piston 1, the lower end of the valve core 3 is in contact with the pre-cooling take-over nozzle 4, and the flow channel of the pre-cooling take-over nozzle 4 is closed, and the valve A spring 6 is sleeved on the core 3, and the upper end of the spring 6 is sleeved on the piston 1. The lower end of the spring 6 contacts the inside of the valve body 2 to provide elastic force to the valve core 3. A sealing ring 5 is provided in the valve body 2. The sealing ring 5 is arranged above the meson outlet. The valve core 3 passes through the sealing ring 5 to input gas to the control takeover nozzle 7 and push the piston 1 and the valve core 3 to slide up and down in the valve body 2. The lower end of the valve body 2 contacts the flow channel of the pre-cooling takeover nozzle 4 and controls the opening and closing of the flow channels among the meson inlet, meson outlet and pre-cooling takeover nozzle 4. When the control take-over nozzle 7 does not pass the control gas, the meson inlet and the meson outlet are disconnected, and the valve core 3 and the valve body 2 form a metal conical sealing pair. When the control take-over nozzle 7 inputs the control gas, the meson inlet and the meson outlet are connected, and the valve core 3 and the pre-cooling take-over nozzle 4 form a metal conical sealing pair. When the control take-over nozzle 7 is degassed, the meson inlet and the meson outlet are connected by relying on the medium force, and the valve core 3 and the pre-cooling nozzle 4 form a metal conical sealing pair, so that when the control chamber is degassed, the valve can be kept open by relying on the medium force, so that the system can work normally.

[0022] like Figure 5 and Figure 6As shown, in this embodiment, the pneumatic valve is used in a low-temperature system. When in use, before the system is ready for operation, the valve core 3 is in the closed position under the action of the spring 6. At this time, the meson inlet is connected to the pre-cooling take-over nozzle 4, and the medium flows into the pre-cooling take-over nozzle 4 through the meson inlet and flows out. When the medium slowly cools down, the pneumatic valve and the system are pre-cooled. When the temperature of the pneumatic valve and the system drops to the operating temperature, the take-over nozzle 7 is controlled to be ventilated. The gas pushes the piston 1 and drives the valve core 3 and the spring 6 downward. The lower end of the valve core 3 closes the flow channel of the pre-cooling take-over nozzle 4. At this time, the pneumatic valve is opened, the meson inlet on the pneumatic valve is connected to the meson outlet, the meson inlet is disconnected from the pre-cooling take-over nozzle 4, and the medium flows from the meson inlet to the meson outlet. The outlet and outflow effectively prevent the system from being damaged by cooling too quickly at startup. When the medium is slowly pressurized, when the medium pressure increases to the system working pressure, the control take-over nozzle 7 is evacuated. At the same time, under the action of the high-pressure medium at the meson inlet, the meson inlet of the pneumatic valve is connected to the meson outlet, and the meson inlet is disconnected from the pre-cooling take-over nozzle 4. The system starts to work normally, avoiding the system from stopping working when the control chamber air pressure is insufficient or the air supply pipeline is damaged. After the pneumatic valve finishes working, when the medium pressure is reduced, the valve core 3 is in the closed position under the action of the spring 6. At this time, the meson inlet is connected to the pre-cooling take-over nozzle 4, and the equipment system stops working.

[0023] The present invention provides a pre-cooling take-over nozzle 4 and a control take-over nozzle 7 at both ends of the valve body 2 and connects them, and provides a meson inlet and a meson outlet on both sides of the valve body 2, and the meson inlet flow channel and the meson outlet flow channel inside the valve body 2 are arranged up and down, and a valve core 3 is provided in the valve body 2, and the control take-over nozzle 7 inputs gas to push the piston 1, the spring 6 and the valve core 3 to slide up and down in the valve body 2, and control the opening and closing of the meson inlet, the meson outlet and the pre-cooling take-over nozzle 4 flow channels. When the control take-over nozzle 7 is not controlled, the piston 1, the spring 6 and the valve core 3 are pushed up and down in the valve body 2. When making gas, the meson inlet and the meson outlet are disconnected, and the valve core 3 and the valve body 2 form a metal conical sealing pair. When the control take-over nozzle 7 inputs the control gas, the meson inlet and the meson outlet are connected, and the valve core 3 and the pre-cooling take-over nozzle 4 form a metal conical sealing pair. When the control take-over nozzle 7 is degased, the meson inlet and the meson outlet are connected by relying on the medium force, and the valve core 3 and the pre-cooling nozzle 4 form a metal conical sealing pair. When the air pressure in the control chamber is insufficient or the air supply pipeline is damaged, the valve can be kept open by relying on the medium force to make the system work normally.

[0024] The above description is only a preferred embodiment of the present invention and does not limit the present invention in any way. Any simple modification, change and equivalent structural change made to the above embodiment based on the technical essence of the present invention shall still fall within the scope of protection of the technical solution of the present invention.

Claims

1. A self-sustaining cryogenic pneumatic valve, characterized in that:

2. The throttle body of claim 1, wherein the throttle body is constructed so as to allow the throttle body to circulate freely in the throttle cavity. The throttle body is constructed so as to allow the throttle body to circulate freely in the throttle cavity. The throttle body is constructed so as to allow the throttle body to circulate freely in the throttle cavity. The throttle body is constructed so as to allow the throttle body to circulate freely in the throttle cavity.

2. A self-sustaining cryogenic pneumatic valve according to claim 1, characterized in that: A sealing ring is sleeved on the upper end of the valve body, and the inner wall of the control nozzle is in contact with the sealing ring.

3. The self-sustaining cryogenic pneumatic valve according to claim 1, characterized in that: A sealing ring is sleeved on the piston, and the outer edge of the sealing ring is in contact with the inner wall of the valve body.

4. The self-sustaining cryogenic pneumatic valve according to claim 1, characterized in that: A sealing ring is provided in the valve body, and the valve core passes through the sealing ring.

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