CN218542432U

CN218542432U - Open-close active control pneumatic control valve

Info

Publication number: CN218542432U
Application number: CN202222165721.0U
Authority: CN
Inventors: 王喜良; 陈涛; 任志彬; 刘耀林; 李莹; 李欢; 张思远; 杨永刚; 范宇
Original assignee: Shaanxi Landspace Technology Co ltd
Current assignee: Shaanxi Landspace Technology Co ltd
Priority date: 2022-08-17
Filing date: 2022-08-17
Publication date: 2023-02-28
Anticipated expiration: 2032-08-17

Abstract

The utility model discloses an open and close active control gas accuse valve. The utility model discloses an open and close active control gas accuse valve opens the operating condition of chamber solenoid valve and close the chamber solenoid valve through active control, realizes filling the control gas to first working chamber or second working chamber, and then makes to produce the pressure differential between first working chamber and the second working chamber, and at the regional effort that forms of unbalanced area difference, drive piston drives the case and makes the action of opening the export of medium passageway, or makes the action of sealed medium passageway export, has solved the long problem of current valve opening/close time. Meanwhile, the control valve body integrates two electromagnetic valve structures, so that the integration function is realized, the pipeline connection is simplified, and the weight is reduced.

Description

Open-close active control pneumatic control valve

Technical Field

The utility model relates to a liquid rocket engine valve control technical field, concretely relates to open and close initiative control gas accuse valve.

Background

Many valves are required in the propellant supply system of liquid rocket engines to control the supply of propellant. In the prior art, liquid rocket engine propellant supply systems often adopt control valves. Such engine control valves typically employ a mode in which the control gas is actively opened and the internal spring force is passively closed under low operating conditions. This solution results in a long closing time of the valve, does not allow to meet the fast response requirements by fast opening and closing, nor does it allow to achieve the goal of fast closing of the valve to reduce the aftereffect impulse.

Accordingly, there is a need in the art for a valve that can actively control the opening and closing of the valve.

SUMMERY OF THE UTILITY MODEL

To the above-mentioned technical problem among the correlation technique, the utility model provides an open and close active control gas accuse valve has overcome the not enough of prior art, can realize opening fast or closing of valve through active control's mode. Meanwhile, the two electromagnetic valves are integrated on the main valve shell, so that the occupied space is saved, the spatial layout of an engine system is optimized, and the miniaturization design of the engine system is facilitated.

The utility model provides an open-close active control pneumatic control valve, which comprises a shell, a valve core, an open-cavity electromagnetic valve, a close-cavity electromagnetic valve and a valve cover; a medium channel is arranged in one side of the shell, the other side of the shell is connected with the cavity opening electromagnetic valve, the cavity opening electromagnetic valve and the valve cover to form a gas channel, and the medium channel is separated from the gas channel through a neck structure;

the medium channel is provided with an inlet and an outlet, one end of the valve core is used for matching with the inner wall of the outlet to form a sealing surface, and the other end of the valve core penetrates through the neck structure and then is connected with a piston arranged in the gas channel;

the piston is movably arranged in the gas channel, the valve core is in dynamic sealing connection with the neck structure, and the valve core can move along with the piston so as to seal and open the outlet;

the piston, the valve core and the shell enclose a first working cavity, and a vent hole of the first working cavity is communicated with the cavity opening electromagnetic valve;

a second working cavity is defined by one side of the piston, which is far away from the first working cavity, the shell and the valve cover, and a vent hole of the second working cavity is communicated with the cavity closing electromagnetic valve;

the shell is also provided with a first air inlet channel communicated with the cavity opening electromagnetic valve and a second air inlet channel communicated with the cavity closing electromagnetic valve;

when the cavity opening electromagnetic valve is electrified and the cavity closing electromagnetic valve is powered off, the first air inlet channel is communicated with the first working cavity; control gas enters the first working cavity through the open-cavity electromagnetic valve, so that the pressure of the first working cavity is greater than that of the second working cavity, and the piston drives the valve core to be away from the outlet of the medium channel, so that the sealing of the valve core on the outlet of the medium channel is released;

when the cavity closing electromagnetic valve is powered on and the cavity opening electromagnetic valve is powered off, the second air inlet channel is communicated with the second working cavity; and control gas enters the second working cavity through the cavity closing electromagnetic valve, so that the pressure of the second working cavity is greater than that of the first working cavity, and the piston drives the valve core to be close to the outlet of the medium channel until the valve core is pressed tightly, so that the outlet of the medium channel is sealed by the valve core.

In one embodiment, the inner wall of the outlet of the medium channel is further provided with a valve seat; the inner wall of the valve seat is used for being matched with the sealing end of the valve core to form a sealing surface so as to seal the medium channel.

In one embodiment, within the media passage, the neck feature has an extension that is protrudingly disposed toward the media passage; the inner wall of the extension part is hermetically arranged with the valve core, and the outer wall of the extension part is provided with a spring; one side of the spring is wound on the periphery of the extension part, and the other side of the spring is wound on the periphery of the valve core; the spring applies elastic force to the valve core sealing end, so that the valve core sealing end presses the valve seat.

In one embodiment, the spring periphery is also provided with a spring seat; the spring is arranged on the shell through the spring seat.

In one embodiment, the open chamber solenoid valve comprises: the electromagnetic valve comprises a first electromagnetic shell, a first exhaust channel, a first pilot valve core, a first coil and a first pilot spring, wherein the first coil and the first pilot spring are sequentially arranged on the periphery of the first exhaust channel; one end of the first pilot valve core is abutted against the first pilot spring, and the other end of the first pilot valve core seals the first air inlet channel under the action of elastic force of the first pilot spring so as to partition the first air inlet channel and the first working cavity;

when the first coil is not electrified, a gap is formed between the first pilot valve core and the inner wall of the first electromagnetic shell, and the gap is used for realizing the communication between the first working cavity and the first exhaust channel;

when the first coil is electrified, the first pilot valve core can overcome the elastic force of the first pilot spring, and the first air inlet channel is unsealed, so that the first air inlet channel is communicated with the first working cavity; meanwhile, the first pilot valve core seals the first exhaust channel to prevent control gas from being exhausted.

In one embodiment, the chamber-closing solenoid valve comprises: the electromagnetic valve comprises a second electromagnetic shell, a second exhaust channel, a second pilot valve core, a second coil and a second pilot spring, wherein the second coil and the second pilot spring are sequentially arranged on the periphery of the second exhaust channel; one end of the second pilot valve core is abutted against the second pilot spring, and the other end of the second pilot valve core seals the second air inlet channel under the action of elastic force of the second pilot spring so as to partition the second air inlet channel from the second working cavity;

when the second coil is not electrified, a gap is formed between the second pilot valve core and the inner wall of the second electromagnetic shell, and the gap is used for realizing the communication between the second working cavity and the second exhaust channel;

after the second coil is electrified, the second pilot valve core can overcome the elastic force of the second pilot spring, and the second air inlet channel is unsealed, so that the second air inlet channel is communicated with the second working cavity; and meanwhile, the second pilot valve core seals the second exhaust channel to prevent control gas from being exhausted.

In one embodiment, the first pilot valve core is provided with a sealing ring at the position for sealing the first air inlet channel and the first exhaust channel respectively; and the second pilot valve core is respectively provided with a sealing ring at the position for sealing the second air inlet channel and the second exhaust channel.

In one embodiment, a sealing ring is arranged at the position where the piston is contacted with the inner wall of the shell so as to isolate the first working chamber and the second working chamber; and a sealing ring is arranged at the position where the valve core is hermetically connected with the neck structure so as to isolate the first working cavity from the medium channel.

In one embodiment, the shell is also provided with a blowing and degassing channel at the position close to the outlet of the medium channel; and blowing gas to the outlet of the medium channel through the blowing gas channel so as to blow away residual medium.

In one embodiment, the valve seat is fixed on the outlet of the shell through a flange in a pressing mode, and a sealing ring is arranged between the valve seat and the inner wall of the shell.

The embodiment of the utility model provides a pair of open and close active control gas accuse valve is normal close formula structure, opens the valve through control gas initiative, and the medium is enough to overcome spring force to the effort of case, and the valve can realize self-sustaining the open mode after removing control gas. When the work is finished, the valve can be closed actively through the control gas, so that the valve can be closed quickly under the dual actions of the spring force and the control gas, and the purpose of reducing the aftereffect impulse is achieved. In addition, two electromagnetic valves are integrated on the main valve shell, so that the occupied space is saved, the weight is reduced, the spatial layout of an engine system is optimized, the pipeline connection is simplified, and the miniaturization design of the engine system is facilitated. The utility model discloses but open and close active control gas accuse valve wide application in space engine propellant supply system.

Those skilled in the art will recognize additional features and advantages upon reading the detailed description, and upon viewing the accompanying drawings.

Drawings

In order to more clearly illustrate the embodiments of the present invention or the technical solutions in the prior art, the drawings required to be used in the embodiments will be briefly described below, and it is obvious that the drawings in the following description are only some embodiments of the present invention, and for those skilled in the art, other drawings can be obtained according to these drawings without creative efforts.

Figure 1 is the utility model discloses the overall structure schematic diagram of opening and close active control gas accuse valve of embodiment.

Fig. 2 is a schematic diagram of the chamber opening solenoid valve and the chamber closing solenoid valve according to the embodiment of the present invention.

Fig. 3 is a schematic structural diagram of an open-cavity solenoid valve according to an embodiment of the present invention.

Fig. 4 is a schematic structural diagram of a cavity closing solenoid valve according to an embodiment of the present invention.

Fig. 5 is a schematic diagram of the communication between the air inlet channel and the working chamber when the chamber opening solenoid valve or the chamber closing solenoid valve of the embodiment of the present invention is powered on.

Fig. 6 is a schematic diagram of the exhaust passage and the working chamber communicating when the chamber opening solenoid valve or the chamber closing solenoid valve of the embodiment of the present invention is powered off.

Detailed Description

The technical solution of the present invention is further explained by the following embodiments with reference to the accompanying drawings. Spatially relative terms such as "under," "below," "at \8230," "lower," "above," "at \8230," "upper," and the like are used for convenience in description to explain the positioning of one element relative to a second element, indicating that the terms are intended to encompass different orientations of the device in addition to different orientations than those illustrated in the figures. Further, for example, the phrase "one element is over/under another element" may mean that the two elements are in direct contact, or that there is another element between the two elements. Furthermore, terms such as "first", "second", and the like, are also used to describe various elements, regions, sections, etc. and should not be taken as limiting. Like terms refer to like elements throughout the description.

Referring to fig. 1 and 2, the utility model provides an open and close active control gas accuse valve, including casing 1, case 2, open chamber solenoid valve 3, close chamber solenoid valve 4 and valve gap 5. A medium channel 6 is arranged in one side of the shell 1, the other side of the shell is connected with the cavity opening electromagnetic valve 3, the cavity closing electromagnetic valve 4 and the valve cover 5 to form a gas channel 7, and the medium channel 6 is separated from the gas channel 7 through a neck structure 11 formed by the shell 1. The medium channel 6 has an inlet 61 and an outlet 62, and the valve core 2 has one end for forming a sealing surface with the inner wall of the outlet 62, and the other end connected with the piston 8 disposed in the gas channel 7 after passing through the neck structure 11. The piston 8 is movably arranged in the gas channel 7, and the position where the valve core 2 is connected with the neck structure 11 is in dynamic sealing connection. The valve core 2 can move along with the piston 8 to realize the sealing and the opening of the outlet 62, and meanwhile, the separation of the medium channel 6 and the gas channel 7 can be realized through the sealing of the valve core 2 and the inner wall of the neck part structure 11.

Whereas the piston 8 is movably arranged in the gas channel 7, the piston 8 encloses a first working chamber 71 on one side with the valve cartridge 2 and the housing 1 and a second working chamber 72 on the other side of the piston 8 with the housing 1 and the valve cover 5. The vent hole of the first working chamber 71 is communicated with the chamber opening solenoid valve 3, so that the first working chamber 71 is inflated by controlling the chamber opening solenoid valve 3. The vent of the second working chamber 72 communicates with the chamber closing solenoid valve 4 to effect inflation of the first working chamber 71 by controlling the chamber closing solenoid valve 4.

The housing 1 is further provided with a first air intake passage 12 communicated with the chamber opening solenoid valve 3 and a second air intake passage 13 communicated with the chamber closing solenoid valve 4, respectively. The first air inlet channel 12 and the second air outlet channel 13 may share one air inlet, and the control air may be filled into the first air inlet channel 12 and the second air outlet channel 13 after entering from the air inlet.

When the chamber-opening solenoid valve 3 is energized, the first working chamber 71 can be made to communicate with the first intake passage 12. When the chamber-opening solenoid valve 3 is de-energized, the chamber-opening solenoid valve 3 blocks the first working chamber 71 from the first intake passage 12, and communicates the first working chamber 71 with the atmosphere.

When the chamber-closing solenoid valve 4 is energized, the second working chamber 72 can be made to communicate with the second intake passage 13. When the chamber closing solenoid valve 4 is de-energized, the chamber closing solenoid valve 4 blocks the second working chamber 72 from the second air intake passage 13, and simultaneously, the second working chamber 72 is made to communicate with the atmosphere.

Specifically, after the valve assembly is completed, when the chamber-opening solenoid valve 3 is energized and the chamber-closing solenoid valve 4 is kept in an deenergized state, the second working chamber 72 is communicated with the atmosphere through the chamber-closing solenoid valve 4, so that the piston is moved from the first working chamber 71 to the second working chamber 72. At the same time, the valve body of the open chamber solenoid valve 3 contacts the seal of the first intake passage 12, and the first intake passage 12 communicates with the first working chamber 71. Control gas enters the first working chamber 71 after passing through the first air inlet channel 12 and the chamber opening electromagnetic valve 3, so that the control gas in the first working chamber 71 is increased, and after an acting force is formed in an unbalanced area difference region, the piston 8 drives the valve core 2 to move towards a direction far away from the medium channel outlet 62, so that the medium channel outlet of the valve is opened.

After the medium pressure is stable, the cavity opening electromagnetic valve 3 can be powered off, the first working cavity control gas is discharged through the cavity opening electromagnetic valve, and the valve can still be kept in an opening state under the action of no control gas.

When the cavity closing solenoid valve coil 4 is electrified and the cavity opening solenoid valve 3 is kept in a power-off state, the first air inlet passage 12 is communicated with the atmosphere through the cavity opening solenoid valve 3, and the second air inlet passage 13 is communicated with the second working cavity 72. The control gas enters the second working chamber 72 through the chamber closing electromagnetic valve 4, so that the control gas in the second working chamber 72 is increased, the pressure is greater than that of the first working chamber 71, an acting force is formed in an unbalanced area difference region, and the piston 8 drives the valve core 2 to move towards the direction close to the medium channel outlet 62 until the sealing end of the valve core 2 is utilized to tightly press and seal the medium channel outlet 62.

The utility model discloses open and close active control gas accuse valve opens the chamber solenoid valve and closes the chamber solenoid valve through active control, realizes filling the control gas to first working chamber or second working chamber, and then makes to produce the pressure differential between first working chamber and the second working chamber, forms the effort in the regional difference of unbalanced area, and drive piston drives the case and makes the action of opening the export of medium passageway, or makes the action of sealed medium passageway export, has solved the long problem of current valve opening/closing time.

Referring to fig. 1, further, to facilitate the manufacture and formation of the valve, and also to facilitate the maintenance and replacement of the sealing position of the valve, a valve seat 14 may be provided on the inner wall of the media passage outlet 62 for cooperating with the valve element to form a seal. The outer wall of the valve seat 14 is butted with the inner wall of the shell 1, and the inner wall of the valve seat 14 is matched with the sealing end of the valve core 2. The inner wall of the valve seat 14 is matched and butted with the sealing end of the valve core 2 to form a sealing surface, and a medium channel can be sealed to block the medium flow between the inlet 61 and the outlet 62.

Further, in order to stably fix the valve seat 14 to the housing 1, the flange 15 may be used to press and fix the valve seat 14 to the housing 1. Specifically, after the valve seat 14 is mounted on the inner wall of the housing 1, the flange 15 is mounted, and the valve seat 14 mounted in place is pressed and fixed by the flange 15.

In the above embodiment, in order to prevent the gap between the valve seat 14 and the inner wall of the housing 1 from leaking the medium, a seal ring may be provided between the valve seat 14 and the inner wall of the housing 1.

With continued reference to fig. 1, in one embodiment, within the media channel 6, the neck feature 11 has an extension that is protrudingly disposed toward the media channel 6. The inner wall of the extension part is hermetically arranged with the valve core 2, and the outer wall of the extension part is provided with a spring 9. One side of the spring 9 is wound on the periphery of the extension part, and the other side of the spring is wound on the periphery of the valve core 2. The back of the sealed end of the valve core 2 is provided with a step for applying force by a spring 9, one end of the spring 9 close to the extending part is abutted against the inner wall of the shell, and the other end of the spring is used for applying elastic force to the back step of the sealed end of the valve core 2 so as to tightly press the sealed end of the valve core 2 on the valve seat 14.

The utility model discloses open and close active control gas accuse valve is normal close formula structure, and under the initial condition, case 2 is sealing medium passageway export 62 under the elastic force effect of spring 9. After control gas enters the first working cavity through the cavity-opening electromagnetic valve, the valve core can be actively controlled to act along with the piston, and the elastic force of the spring is overcome to open a medium channel of the valve. When a medium channel of the valve needs to be closed, control gas enters a second working cavity of the valve through a cavity closing electromagnetic valve to form a valve closing acting force, the valve closing acting force and the spring force combine to enable the piston to drive the valve core to rapidly move towards the outlet direction of the medium channel, the valve core is attached to the sealing surface of the valve seat, and the valve is closed.

Further, in order to prevent the medium from impacting the spring 9 and causing instability, the embodiment of the present invention may provide a spring seat 91 at the periphery of the spring 9. The spring 9 is provided in the housing 1 via the spring seat 91, and the spring seat 91 can restrict most of the vibration of the spring.

The utility model discloses open and close active control gas accuse valve, the integration is equipped with two solenoid valve structures in the chamber of opening and closing, integrates respectively on casing and the valve bonnet to communicate with each other with same control gas import.

Referring to fig. 2, 3, 5 and 6 together, in one embodiment, the open chamber solenoid valve 3 comprises: the solenoid valve includes a first solenoid housing 31, a first exhaust passage 32, a first pilot spool 33, and a first coil 34 and a first pilot spring 35 that are sequentially disposed on the periphery of the first exhaust passage 32. The first pilot spool 33 has one end abutting against the first pilot spring 35 and can be used to open or seal the first exhaust passage 32. The other end of the first pilot spool 32 is configured to seal the first intake passage 12 to block the first intake passage 12 from the first working chamber 71. Under the elastic force of the first pilot spring 35, the first pilot spool 32 closes the first intake passage 12 in an initial state of the open-chamber electromagnetic valve.

When the first coil 34 is not energized, there is a space (see fig. 6) between the first pilot spool 33 and the inner wall of the first solenoid housing 31, and the space is used to communicate the first working chamber 71 with the first exhaust passage 12.

When the first coil 34 is energized, the first pilot spool 33 releases the seal of the first intake passage 12 against the elastic force of the first pilot spring 35 to communicate with the first working chamber 71 (see fig. 5). The control gas enters the first working chamber 71 from the first gas inlet channel 12 after passing through the open chamber solenoid valve 3, and meanwhile, the other end of the first pilot valve core 33 also seals the first exhaust channel 32 to prevent the control gas flowing through the open chamber solenoid valve 3 from being exhausted.

Wherein the chamber opening electromagnetic valve and the chamber closing electromagnetic valve can be the same type of electromagnetic valve.

Further, referring to fig. 2, 4, 5 and 6 simultaneously, the chamber-closing solenoid valve 4 includes: the second solenoid housing 41, the second exhaust passage 42, the second pilot spool 43, and the second coil 44 and the second pilot spring 45 that are sequentially provided at the periphery of the second exhaust passage 42. One end of the second pilot spool 43 abuts against the second pilot spring 45, and can be used to open or seal the second exhaust passage 42. The other end of the second pilot spool 43 seals the second intake passage 13 under the elastic force of the second pilot spring 45 to block the second intake passage 13 from the second working chamber 72. Under the elastic force of the second pilot spring 45, the chamber-closing solenoid valve 4 is in an initial state in which the second pilot spool 42 closes the second intake passage 13.

When the second coil 44 is not energized, there is a space (for example, the state shown in fig. 6) between the second pilot spool 43 and the inner wall of the second solenoid housing 41, and this space is used to communicate the second working chamber 72 with the second exhaust passage 13.

When the second coil 44 is energized, the second pilot valve body 43 can release the seal of the second intake passage 13 against the elastic force of the second pilot spring 45, and communicate with the second working chamber 72 (for example, the state shown in fig. 5). The control air passes through the chamber closing solenoid valve 4 from the second air inlet passage 13 and then enters the second working chamber 72, and the other end of the second pilot valve spool 43 seals the second exhaust passage 42 to prevent the control air passing through the chamber closing solenoid valve from being exhausted.

The utility model discloses open and close active control gas accuse valve, two integrated solenoid valve structures have realized promptly integrating the function, having simplified the tube coupling in casing and valve gap, have reduced valve weight again.

Referring to fig. 1, in one embodiment, the first pilot spool 33 is provided with a sealing ring at a position for sealing the first intake passage 12 and the first exhaust passage 32, respectively, and the second pilot spool 43 is also provided with a sealing ring at a position for sealing the second intake passage 13 and the second exhaust passage 42, respectively, for sealing a gap of the respective abutment surfaces to prevent leakage of control gas.

Further, in order to prevent the first and second working

chambers

71 and 72 from being ventilated, a sealing ring may be provided at a position where the piston 8 contacts the inner wall of the housing 1.

In order to increase the sealing of the valve core against the inner wall of the housing neck, a sealing ring may be provided at the location where the valve core 2 is connected to the housing neck 11 to isolate the first working chamber 71 from the medium channel 6.

In one embodiment, the housing 1 is further provided with a blow-off gas channel 10 near the outlet 62 of the medium channel 6. The purge gas is blown toward the medium passage outlet 62 through the purge gas passage 10 to purge the medium remaining at the outlet 62.

The above embodiments of the present invention can be combined with each other, and have corresponding technical effects.

The utility model discloses an open and close initiative control gas accuse valve is normal close formula structure, opens the valve through control gas initiative, and the medium is enough to overcome the spring effort to the effort of case, and the valve can realize self-sustaining open mode after removing the control gas. When the work is finished, the valve can be closed actively through the control gas, so that the valve can be closed quickly under the dual actions of the spring force and the control gas, and the purpose of reducing the aftereffect impulse is achieved. In addition, two electromagnetic valves are integrated on the main valve shell, so that the occupied space is saved, the weight is reduced, the spatial layout of an engine system is optimized, the pipeline connection is simplified, and the miniaturization design of the engine system is facilitated. The utility model discloses but open and close active control gas accuse valve wide application in space engine propellant supply system.

The above description is only a preferred embodiment of the present invention, and should not be taken as limiting the invention, and any modifications, equivalent replacements, improvements, etc. made within the spirit and principle of the present invention should be included in the protection scope of the present invention.

Claims

1. The utility model provides an open and close active control gas accuse valve which characterized in that includes: the valve comprises a shell, a valve core, an open cavity electromagnetic valve, a closed cavity electromagnetic valve and a valve cover;

a medium channel is arranged in one side of the shell, the other side of the shell is connected with the cavity opening electromagnetic valve, the cavity closing electromagnetic valve and the valve cover to form a gas channel, and the medium channel is separated from the gas channel through a neck structure;

2. The open-close active control pneumatic control valve according to claim 1, wherein a valve seat is further arranged on the inner wall of the outlet of the medium channel; the inner wall of the valve seat is used for being matched with the sealing end of the valve core to form a sealing surface so as to seal the medium channel.

3. The open-close active control pneumatic control valve according to claim 2, wherein in the media passage, the neck structure is provided with an extension part protruding towards the media passage; the inner wall of the extension part and the valve core are arranged in a sealing way, and the outer wall of the extension part is provided with a spring;

one side of the spring is wound on the periphery of the extension part, and the other side of the spring is wound on the periphery of the valve core; the spring applies elastic force to the valve core sealing end, so that the valve core sealing end presses the valve seat.

4. The open-close active control pneumatic control valve according to claim 3, wherein a spring seat is arranged on the periphery of the spring; the spring is arranged on the shell through the spring seat.

5. The open-close active control pneumatic control valve according to any one of claims 1 to 4, wherein the open-cavity solenoid valve comprises: the electromagnetic valve comprises a first electromagnetic shell, a first exhaust channel, a first pilot valve core, a first coil and a first pilot spring, wherein the first coil and the first pilot spring are sequentially arranged on the periphery of the first exhaust channel;

one end of the first pilot valve core is abutted against the first pilot spring, and the other end of the first pilot valve core seals the first air inlet channel under the action of elastic force of the first pilot spring so as to partition the first air inlet channel from the first working cavity;

6. The open-close active control pneumatic control valve according to claim 5, wherein the chamber closing solenoid valve comprises: the electromagnetic valve comprises a second electromagnetic shell, a second exhaust channel, a second pilot valve core, a second coil and a second pilot spring, wherein the second coil and the second pilot spring are sequentially arranged on the periphery of the second exhaust channel;

one end of the second pilot valve core is abutted against the second pilot spring, and the other end of the second pilot valve core seals the second air inlet channel under the action of elastic force of the second pilot spring so as to partition the second air inlet channel from the second working cavity;

7. The open-close active control pneumatic control valve according to claim 6, wherein the first pilot valve core is respectively provided with a sealing ring at a position for sealing the first air inlet channel and the first exhaust channel;

and the second pilot valve core is respectively provided with a sealing ring at the position for sealing the second air inlet channel and the second exhaust channel.

8. The open-close active control pneumatic control valve according to claim 7, wherein a sealing ring is arranged at a position where the piston is contacted with the inner wall of the shell so as to isolate the first working cavity from the second working cavity;

and a sealing ring is arranged at the position where the valve core is hermetically connected with the neck structure so as to isolate the first working cavity from the medium channel.

9. The open-close active control pneumatic control valve according to claim 8, wherein a blowing and degassing channel is further arranged at a position, close to the outlet of the medium channel, of the shell; and blowing out gas to the medium channel outlet through the blowing gas channel so as to blow off residual medium.

10. The open-close active control pneumatic control valve according to claim 2, wherein the valve seat is tightly pressed and fixed at the outlet of the shell through a flange, and a sealing ring is further arranged between the valve seat and the inner wall of the shell.