CN111043335A

CN111043335A - Pneumatic solenoid valve and aircraft

Info

Publication number: CN111043335A
Application number: CN201911111179.7A
Authority: CN
Inventors: 不公告发明人
Original assignee: Ningbo Space Engine Technology Co ltd
Current assignee: Ningbo Space Engine Technology Co ltd
Priority date: 2019-11-14
Filing date: 2019-11-14
Publication date: 2020-04-21
Anticipated expiration: 2039-11-14
Also published as: CN111043335B

Abstract

The invention is suitable for the field of electromagnetic valves and provides a pneumatic electromagnetic valve and an aircraft. A liquid outlet of the pneumatic electromagnetic valve is connected with the aircraft, the pneumatic electromagnetic valve comprises an air inlet part, a liquid inlet part and a fixing part, the air inlet part is provided with an air inlet, the liquid inlet part comprises a first cavity and a first valve core, the first cavity is communicated with the air inlet through a first channel, and the first valve core can move in the first cavity to open or close the liquid outlet; the fixing part comprises a second cavity, a clamping rod, a first plugging piece and a second channel, the second cavity is communicated with the first cavity through a third channel, and the clamping rod and the first plugging piece are respectively positioned at two ends of the second channel; the first valve core is provided with a clamping groove, when the first blocking piece is disassembled, the clamping rod can move in the second cavity to penetrate through the clamping groove, and the first valve core is fixed in the first cavity to keep the liquid outlet open; when the clamping rod is disassembled, the first valve core is introduced into the opening liquid outlet along with gas or is discharged out of the sealing liquid outlet along with gas. The invention can meet different requirements of the aircraft in different states.

Description

Pneumatic solenoid valve and aircraft

Technical Field

The invention belongs to the field of electromagnetic valves, and particularly relates to a pneumatic electromagnetic valve and an aircraft.

Background

The ground test is needed before the formal flight of the aircraft, and the valve is opened or closed for multiple times to ensure whether the valve and the aircraft can work normally, namely the valve needs to have the function of opening and closing for multiple times, so that the requirement of the ground test is met.

In the formal flight process of the aircraft, the valve needs to be kept in an open state all the time to continuously obtain the propellant to ensure normal flight, so that the valve needs to be continuously supplied with electric energy and an air source to be continuously opened, if the valve is closed due to power failure or air failure and the aircraft cannot be supplied with the propellant, the whole aircraft system is in an inoperable state, and the aircraft cannot normally fly.

The existing method generally adopts the following two methods to meet the requirements that the valve is opened and closed for many times during ground test and is kept normally open during flight of the aircraft: firstly, the electromagnetic valve with the automatic control function is adopted as the valve of the aircraft, the design of gas-electric control on the electromagnetic valve is needed, and the designs are relatively redundant, so that the additional structure and weight of the aircraft are increased, and the light and small size of the aircraft are not facilitated; secondly, use the auto-lock valve to keep the open mode of valve, and the volume of auto-lock valve, weight are great to need to adopt the permanent magnet to control the valve and open always, the cost of permanent magnet is too high, is unfavorable for the volume production of aircraft.

Disclosure of Invention

The embodiment of the invention provides a pneumatic electromagnetic valve, and aims to solve the problems of how to meet the requirement of multiple opening and closing of a valve in the ground test process of an aircraft and how to keep the valve open in the flight process.

The embodiment of the invention is realized in such a way that a pneumatic solenoid valve is used for an aircraft, the aircraft is connected with a liquid outlet of the pneumatic solenoid valve, and the pneumatic solenoid valve comprises:

an air inlet part provided with an air inlet;

the liquid inlet part comprises a first cavity and a first valve core movably arranged in the first cavity, the first cavity is communicated with the gas inlet through a first channel, and the first valve core can move in the first cavity to open or close the liquid outlet; and

the fixing part comprises a second cavity, a clamping rod and a first plugging piece which are detachably arranged in the second cavity, and a second channel, the second cavity is communicated with the first cavity through a third channel, and the clamping rod and the first plugging piece are respectively positioned at two ends of the second channel;

the first valve core is provided with a clamping groove, and when the clamping rod is reserved and the first blocking piece is disassembled, the clamping rod can move in the second cavity to penetrate through the clamping groove, so that the first valve core is fixed in the first cavity to keep the liquid outlet open; when the clamping rod is disassembled and the first blocking piece is reserved, the first valve core opens the liquid outlet along with the introduction of gas, or the first valve core closes the liquid outlet along with the discharge of gas.

The embodiment of the invention also provides an aircraft, which comprises the pneumatic electromagnetic valve of the embodiment, and the aircraft is connected with the liquid outlet of the pneumatic electromagnetic valve.

The invention has the advantages that the clamping rod or the first blocking piece can be selectively detached according to actual requirements due to the detachable arrangement of the clamping rod and the first blocking piece, so that when the aircraft is tested on the ground, the clamping rod is detached and the first blocking piece is reserved, the first valve core opens the liquid outlet along with the introduction of gas or closes the liquid outlet along with the discharge of the gas, and the aim of controlling the pneumatic electromagnetic valve to be opened and closed for many times through gas and electricity is fulfilled; and when the aircraft was flying, remain the kelly and dismantle first shutoff piece, the kelly can remove to wearing to establish the draw-in groove in the second cavity, makes first case be fixed in the first cavity, realizes the auto-lock of first case, keeps the liquid outlet open to continuously supply with the propellant, guaranteed the normal flight of aircraft, satisfied different demands under the different condition, simple structure, the volume is less, and the cost is lower, and the gas electric control effect is better.

Drawings

FIG. 1 is a schematic cross-sectional view of a pneumatic solenoid valve provided in an embodiment of the present invention;

FIG. 2 is a schematic cross-sectional view of a pneumatic solenoid valve provided in an embodiment of the present invention during ground test;

FIG. 3 is a schematic cross-sectional view of a pneumatic solenoid valve provided in an embodiment of the present invention in a flight state;

FIG. 4 is a schematic cross-sectional view of an air intake section provided by an embodiment of the present invention;

FIG. 5 is a schematic cross-sectional view of a liquid inlet provided by an embodiment of the invention;

FIG. 6 is a schematic cross-sectional view of a fixing portion according to an embodiment of the present invention;

fig. 7 is a schematic cross-sectional view of a second closure according to an embodiment of the present invention, both in ground test and in flight.

Detailed Description

In order to make the objects, technical solutions and advantages of the present invention more apparent, the present invention is described in further detail below with reference to the accompanying drawings and embodiments. It should be understood that the specific embodiments described herein are merely illustrative of the invention and are not intended to limit the invention.

The existing method generally adopts the following two methods to meet the requirements that the valve is opened and closed for many times during ground test and is kept normally open during flight of the aircraft: firstly, a pneumatic electromagnetic valve with an automatic control function is adopted as a valve of the aircraft, the pneumatic electromagnetic valve needs to be subjected to pneumatic and electric control, the pneumatic electromagnetic valve is relatively redundant in design, the additional structure and weight of the aircraft are increased, and the light and small size of the aircraft are not facilitated; secondly, use the auto-lock valve to keep the open mode of valve, and the volume of auto-lock valve, weight are great to need to adopt the permanent magnet to control the valve and open always, the cost of permanent magnet is too high, is unfavorable for the volume production of aircraft.

According to the pneumatic electromagnetic valve provided by the embodiment of the invention, the clamping rod and the first plugging piece are detachably arranged, so that the clamping rod or the first plugging piece is selectively detached according to actual requirements when an aircraft is tested on the ground or flies formally, the aircraft can be opened and closed for many times in the ground test process, and the valve can be kept open in the flying process, so that different requirements are met.

Example one

Referring to fig. 1 to 3, a pneumatic solenoid valve 100 according to an embodiment of the present invention is used in an aircraft, and the aircraft is connected to a liquid outlet 101 of the pneumatic solenoid valve 100. The pneumatic solenoid valve 100 includes an air inlet portion 10, an inlet portion 20, and a fixing portion 30. The intake portion 10 is provided with an intake port 11. The liquid inlet portion 20 includes a first cavity 21 and a first valve core 22 movably disposed in the first cavity 21, the first cavity 21 is communicated with the gas inlet 11 through a first channel 102, and the first valve core 22 is movable in the first cavity 21 to open or close the liquid outlet 101. The fixing portion 30 includes a second cavity 31, a clamping rod 32 detachably disposed in the second cavity 31, a first blocking piece 33, and a second channel 34, the second cavity 31 is communicated with the first cavity 21 through the third channel 103, the clamping rod 32 and the first blocking piece 33 are respectively disposed at two ends of the second channel 34, and the first valve core 22 is provided with a clamping groove 221.

When the clamping rod 32 is retained and the first blocking piece 33 is detached, the clamping rod 32 can move in the second cavity 31 to the through clamping groove 221, so that the first valve core 22 is fixed in the first cavity 21 to keep the liquid outlet 101 open; when the clamping rod 32 is detached and the first blocking piece 33 is remained, the first valve core 22 opens the liquid outlet 101 along with the introduction of the gas, or the first valve core 22 closes the liquid outlet 101 along with the discharge of the gas.

In the embodiment of the present invention, the clamping rod 32 and the first blocking piece 33 are detachably disposed in the second cavity 31, and the clamping rod 32 or the first blocking piece 33 is selectively detached according to actual requirements. When the aircraft is in a ground test stage, the clamping rod 32 is disassembled and the first blocking piece 33 is reserved, at this time, the first valve core 22 opens the liquid outlet 101 along with the introduction of gas, or the first valve core 22 closes the liquid outlet 101 along with the discharge of gas, so that the pneumatic electromagnetic valve 100 is controlled by gas and electricity to switch the valve for multiple times;

when the aircraft is in a flight phase, the clamping rod 32 is retained and the first blocking piece 33 is detached, the clamping rod 32 can move in the second cavity 31 to the through clamping groove 221, and at the moment, the first valve core 22 is fixed in the first cavity 21 to keep the liquid outlet 101 open, so that the propellant is continuously supplied, and the normal flight of the aircraft is ensured. The pneumatic solenoid valve 100 of the embodiment of the invention meets different requirements under different conditions, and has the advantages of simple structure, small volume, low cost and good pneumatic and electric control effects.

It is understood that the pneumatic solenoid valve 100 according to the embodiment of the present invention is used in an aircraft, in other embodiments, the pneumatic solenoid valve 100 may be applied to other apparatuses, and the pneumatic solenoid valve 100 may also be another type of solenoid valve, which is not limited herein.

Specifically, the pneumatic solenoid valve 100 includes a housing, the air inlet portion 10, the liquid inlet portion 20, and the fixing portion 30 are structures of each portion in the pneumatic solenoid valve 100, and are integrally disposed in the housing to form the pneumatic solenoid valve 100, the first cavity 21 and the second cavity 31 are internal spaces of each portion of the housing, the first cavity 21 is configured to accommodate the first valve core 22 and enable the first valve core 22 to move, the first cavity 21 is a space that is not completely communicated, in an embodiment of the present invention, as shown in fig. 1 to 3, the first cavity 21 is partitioned into an upper space, a middle space, and a lower space that are relatively independent, the upper space, the middle space, and the lower space are communicated under a specific condition, and the middle portion of the first cavity 21 is communicated with the first channel 102; the second cavity 31 is used for accommodating the clamping rod 32 and enabling the clamping rod 32 to move, similarly, the second cavity 31 is partitioned into a left space and a right space which are relatively independent, the left space and the right space are communicated under specific conditions, the clamping rod 32 is located at the left part of the second cavity 31, and the right part of the second cavity 31 is communicated with the second channel 34.

The aircraft is connected with the liquid outlet 101 of the pneumatic solenoid valve 100 to control the supply of the propulsion liquid to the aircraft through the pneumatic solenoid valve 100. The air inlet 11 of the pneumatic solenoid valve 100 is connected with an air transmission pipeline or an air bottle of an aircraft to inject high-pressure gas into the pneumatic solenoid valve 100, and the high-pressure gas can be used for pushing the first valve core 22 to move and controlling the opening of the liquid outlet 101 by the pneumatic solenoid valve 100. The first valve core 22 can move up and down along the first cavity 21, when the first valve core 22 moves to a proper position, the liquid outlet 101 can be opened or closed, and the clamping rod 32 can move left and right in the second cavity 31 to fix or release the first valve core 22.

More, the first channel 102, the second channel 34 and the third channel 103 may be actual pipes, or channels opened in the internal structure of the housing for flowing high-pressure gas, or a combination of actual pipes and opened channels.

Referring to fig. 2, when a ground test is performed on the aircraft, in order to prevent the first valve core 22 from being fixed due to the fact that the clamping rod 32 penetrates through the clamping groove 221, and the pneumatic solenoid valve 100 can only be opened but cannot be closed, and a normal test process of the aircraft is affected, at this time, the clamping rod 32 is detached from the second cavity 31, and the first blocking piece 33 is retained to prevent the second cavity 31 from being communicated with the outside, so that it is ensured that high-pressure gas cannot flow out from the pneumatic solenoid valve 100 and into the upper portion of the first valve core 22. The high pressure gas can be continuously accumulated in the first cavity 21 and act on the middle portion of the first valve core 22, and no high pressure gas flows into the upper portion of the first valve core 22 (i.e. the upper portion of the first cavity 21), and a certain pressure difference is generated between the upper portion and the middle portion, when the high pressure gas is accumulated to a certain volume, i.e. the pressure in the middle portion of the first valve core 22 reaches a certain magnitude, the first valve core 22 is pushed to move upwards to open the liquid outlet 101, the propellant can flow to the corresponding portion of the aircraft, the gas in the space above the first valve core 22 flows out from the gas leakage hole 104, and the gas leakage hole 104 is opened between the gas inlet portion 10 and the fixing portion 30. When the high pressure gas is vented, the first valve core 22 moves back to the initial position to close the outlet 101, and the propellant cannot flow to the corresponding part of the aircraft.

Referring to fig. 3, when the aircraft is in formal flight, in order to avoid that the air pressure inside the pneumatic solenoid valve 100 is too high and the jamming rod 32 is difficult to move or even unable to move due to complete sealing of the first cavity 21 and the second cavity 31, the first blocking piece 33 is removed while the jamming rod 32 is retained, so that the second channel 34 forms a passage, and it is ensured that the jamming rod 32 can smoothly move to the through slot 221 to fix the first valve core 22, the jamming rod 32 blocks one end of the second channel 34, the second cavity 31 is filled with high-pressure air, and the second channel 34 is communicated with the outside of the pneumatic solenoid valve 100, at this time, a pressure difference is generated between the second cavity 31 and the second channel 34, and when the pressure in the second cavity 31 is sufficiently higher than the pressure in the second channel 34, the movement of the jamming rod 32 can be promoted.

Furthermore, the volume of the first cavity 21 and the volume of the second cavity 31 can be designed, so that the clamping rod 32 is accurately aligned with the clamping groove 221 and inserted into the clamping groove 221; or, the jamming rod 32 is firstly pushed and pressed to contact with the first valve core 22, and when the first valve core 22 gradually rises to a certain height, the jamming rod 32 is inserted into the jamming groove 221. The above description of the engagement of the catch lever 32 with the catch slot 221 is merely exemplary and not intended to limit the present invention.

In the embodiment of the present invention, the first blocking element 33 is in a threaded configuration, that is, the first blocking element 33 and the fixing portion 30 are partially fixed by threads, so as to ensure the stability of the first blocking element 33 in the pneumatic solenoid valve 100, prevent the first blocking element 33 from being pushed out due to too large pressure in the pneumatic solenoid valve 100, and ensure the normal operation of the pneumatic solenoid valve 100 and the aircraft. In other embodiments, the first blocking element 33 may have other configurations, such as a snap-fit fastening, and the like, and is not limited to the above-mentioned screw-fit fastening, and may be specifically configured on the premise of ensuring the stability of the first blocking element 33.

Example two

Referring to fig. 1, 6 and 7, further, the fixing portion 30 further has a through slot 35, the fixing portion 30 further includes a second blocking member 37, the second blocking member 37 includes a pushing seat 371, a plug 373, and a connecting rod 372 separating the plug 373 from the pushing seat 371, the pushing seat 371 is connected to the clamping rod 32 and movably disposed opposite to the connecting rod 372 and the plug 373, and a cross-sectional area of the connecting rod 372 is smaller than a cross-sectional area of the plug 373;

when the clamping rod 32 is disassembled, the connecting rod 372 and the plug 373 prop against the pushing seat 371, and the pushing seat 371 is kept between the through groove 35 and the second cavity 31, so that the first cavity 21 is not communicated with the second cavity 31;

when the clamping rod 32 is retained, the clamping rod 32 is inserted into the through groove 35, when the first valve core 223 moves towards the second elastic element 24 until the height of the base 222 is higher than that of the third channel 103, the gas enters the second cavity 31 through the third channel 103, and pushes the pushing seat 371 to push the clamping rod 32 to move towards the first valve core 22 until the clamping rod 32 penetrates through the through groove 35 and the clamping groove 221, and the pushing seat 371 and the connecting rod 372 are spaced and close the second channel 34.

Specifically, please refer to fig. 7a, when the aircraft is tested on the ground, the jamming rod 32 is detached and high-pressure gas is introduced into the pneumatic solenoid valve 100, because the pushing seat 371 is located between the through groove 35 and the second cavity 31, separates the left portion and the right portion of the second cavity 31, and is supported by the connecting rod 372 and the plug 373, the upper portion of the first cavity 21 is not communicated with the right portion of the second cavity 31, and the high-pressure gas cannot flow from the first cavity 21 to the second cavity 31 through the through groove 35, so that the high-pressure gas can be prevented from entering the upper portion of the first cavity 21 from the second cavity 31 through the third channel 103, so that a pressure difference is formed between the upper portion and the middle portion of the first cavity 21, and the pressure of the middle portion is greater than that of the upper portion, and thus the first valve core 22 can be pushed to move upward; the cross-sectional area of the connecting rod 372 is smaller than that of the plug 373, which is beneficial for the high-pressure gas to act on the pushing seat 371 more intensively, and better pushes the clamping rod 32 to move leftwards.

Referring to fig. 7b, when the aircraft is in a flight state, the jamming rod 32 is inserted into the through groove 35, the through groove 35 can guide the jamming rod 32 to the first valve core 22, and the movement of the jamming rod 32 is smoother. When the first valve rod 223 moves upward to a position where the height of the base 222 is higher than that of the third channel 103, the height of the first sealing ring 25 is also higher than that of the third channel 103, the high-pressure gas enters the right portion of the second cavity 31 from the upper portion of the first cavity 21, the connecting rod 372 is fixed with the end enclosure 373, when the high-pressure gas accumulates to a certain volume in the second cavity 31, the high-pressure gas acts on the pushing seat 371 and pushes the pushing seat 371 to move leftward, and meanwhile, the pushing seat 371 pushes the clamping rod 32 to move leftward and enter the first cavity 21 (to move toward the first valve core 22). When the clamping rod 32 passes through the through groove 35 and is inserted into the clamping groove 221, the first valve core 22 is locked in the first cavity 21, the liquid path channel 231 and the liquid outlet 101 are kept continuously opened, the pushing seat 371 seals the second channel 34, and high-pressure gas can be prevented from being discharged from the second channel 34, so that the high-pressure gas is limited in the second cavity 31 and acts on the pushing seat 371 in a centralized manner, and smooth movement of the clamping rod 32 is ensured.

EXAMPLE III

With reference to fig. 1 and 4, the air inlet portion 10 further includes a retainer ring 18 disposed in the first housing 12, the retainer ring 18 defines an air inlet passage 181, the stem 14 passes through the air inlet passage 181, the second valve element 13 and the third valve element 15 are respectively located at two sides of the air inlet passage 181, and when the stem 14 drives the second valve element 13 and the third valve element 15 to move simultaneously, the second valve element 13 or the third valve element 15 can contact with the retainer ring 18; when the second spool 13 is in contact with the retainer 18 and the third spool 15 is spaced from the retainer 18, the intake passage 181 is closed and the intake port 11 is not communicated with the first passage 102; when the second spool 13 is spaced apart from the retainer 18 and the third spool 15 is in contact with the retainer 18, the intake passage 181 is opened, and the intake port 11 and the first passage 102 communicate through the intake passage 181.

Specifically, retainer ring 18 is annular in shape, and retainer ring 18 contacts the opposing upper and lower walls of first housing 12 at the opposing upper and lower ends, respectively, as viewed in fig. 1 or 4; alternatively, it is understood that retainer ring 18 is embedded within first housing 12. The air inlet passage 181 is opened in the middle of the retainer ring 18, and when the air inlet passage 181 is closed, the retainer ring 18 can close the communication between the air inlet 11 and the first passage 102. The ejector rod 14 can drive the second valve core 13 and the third valve core 15 to move left and right relative to the retainer ring 18 simultaneously, so that the second valve core 13 or the third valve core 15 is in contact with the retainer ring 18; when the second valve element 13 contacts with the retainer ring 18, that is, the second valve element 13 closes the opening on the left side of the intake passage 181, the third valve element 15 is spaced from the retainer ring 18, that is, the third valve element 15 does not close the opening on the right side of the intake passage 18, at this time, the intake port 11 is not communicated with the first passage 102, high-pressure gas cannot enter the first passage 102 and the first cavity 21, but if high-pressure gas exists in the first cavity 21, the high-pressure gas can be discharged from the first passage 102 to the third valve element 15 side;

when the second valve element 13 is spaced from the retainer 18, that is, the second valve element 13 does not close the opening on the left side of the intake passage 181, the third valve element 15 contacts the retainer 18, that is, the third valve element 15 closes the opening on the right side of the intake passage 181, the intake port 11 communicates with the first passage 102 through the intake passage 181, and high-pressure gas enters the first cavity 21 through the intake port 11, the intake passage 181 and the first passage 102.

It can be understood that, because the second valve element 13 and the third valve element 15 are fixedly connected by the carrier rod 14, and the carrier rod 13 needs to drive the second valve element 13 and the third valve element 15 to move simultaneously relative to the retainer 18, the length of the carrier rod 14 is greater than the length of the air inlet passage 181, so as to ensure that the second valve element 13 and the third valve element 15 do not contact with the retainer 18 simultaneously, so as to ensure that the second valve element 13 and the third valve element 15 can move smoothly left and right relative to the retainer 18.

In one embodiment of the present invention, retainer ring 18 may be formed of a rubber material. When the rubber retainer ring 18 contacts the second valve element 13 or the third valve element 15, the rubber retainer ring 18 and the second valve element 13 or the third valve element 15 can be in close contact with each other, so that a good sealing effect is achieved, and meanwhile, the second valve element 13 and the third valve element 15 are not easily damaged due to excessive and overlarge friction generated between the retainer ring 18 and the second valve element 13 or the third valve element 15, so that the service lives of the second valve element 13 and the third valve element 15 are guaranteed.

Example four

With reference to fig. 4, the air inlet 10 further includes a first elastic element 16 disposed on one side of the second valve core 13 and an electromagnetic element 17 disposed on one side of the third valve core 15, the plunger 14 penetrates the third valve core 15 to be fixedly connected to the electromagnetic element 17, the electromagnetic element 17 can drive the plunger 14 to move, one end of the first elastic element 16 is fixedly connected to the first housing 12, and the other end of the first elastic element 16 is fixedly connected to the second valve core 13; when the electromagnetic element 17 is powered on, the driving ejector rod 14 pushes the third valve core 15 and the second valve core 13 to move towards the direction close to the first elastic element 16, and when the second valve core 13 is spaced from the retainer ring 18 and the third valve core 15 is contacted with the retainer ring 18, the air inlet channel 181 is opened; when the electromagnetic element 17 is de-energized, the first elastic element 16 pushes the second valve element 13, the push rod 14 and the third valve element 15 to move away from the first elastic element 16, and when the second valve element 13 is in contact with the retainer 18 and the third valve element 15 is spaced from the retainer 18, the air inlet passage 181 is closed.

Specifically, the first elastic element 16 and the electromagnetic element 17 are disposed at two ends of the first housing 12, so as to control the left and right movement of the plunger 14 at two ends of the first housing 12, respectively, and the air inlet 11, the first elastic element 16, the second valve core 13, the plunger 14, the third valve core 15 and the electromagnetic element 17 are arranged in a substantially linear manner, and are arranged regularly and orderly, so that the occupied space is small, the air inlet 10 and the pneumatic solenoid valve 100 are more miniaturized and integrated, and the space utilization rate of the air inlet 10 is improved.

One end of the first elastic element 16 may be fixed to the first housing 12 by means of engagement, riveting, screwing, bonding, welding, or the like, and the other end of the first elastic element 16 may be fixed to the second valve body 13 by means of engagement, riveting, screwing, bonding, welding, or the like. When the electromagnetic element 17 is powered on, a magnetic field is generated, the ejector rod 14 is pushed to move towards the left under the action of the magnetic field, meanwhile, the ejector rod 14 drives the third valve core 15 and pushes the second valve core 13 to move towards the left, the first elastic element 16 is compressed until the third valve core 15 is in contact with the retainer ring 18 and closes the air inlet channel 181, and a certain distance is kept between the second valve core 13 and the retainer ring 18, so that air can flow from the space between the second valve core 13 and the retainer ring 18 to the air inlet channel 181 and the first channel 102;

when the electromagnetic element 17 is de-energized, the magnetic force disappears, the plunger 14 acts on the second valve core 13 to eliminate the pressure of the compression of the first elastic element 16, at this time, the first elastic element 16 will expand to generate a reverse elastic force to push the second valve core 13 and the plunger 14 to move toward the third valve core 15 until the second valve core 13 contacts with the retainer ring 18 and the third valve core 15 keeps a certain interval with the retainer ring 18, the flow of gas to the intake passage 181 and the first passage 102 is cut off, i.e., the gas cannot flow into the pneumatic electromagnetic valve 100, if high-pressure gas exists in the pneumatic electromagnetic valve 100 (the first cavity 21), the high-pressure gas will flow from the first passage 102 to between the retainer ring 18 and the third valve core.

For example, in an embodiment of the present invention, the first elastic element 16 may be a spring, and the electromagnetic element 17 may be an electromagnet, and in other embodiments, the first elastic element 16 and the electromagnetic element 17 may be other elements, which are not limited in this respect.

EXAMPLE five

Referring to fig. 1 and fig. 5, further, the liquid inlet 20 further includes a second casing 23 and a second elastic element 24 connecting the first valve core 22 and the second casing 23, the second casing 23 is connected to the first casing 12, and the first cavity 21 is opened in the second casing 23; when the second valve core 13 is spaced from the retainer 18 and the third valve core 15 is in contact with the retainer 18, the gas pushes the first valve core 22 in the first cavity 21 to move towards the second elastic element 24 to open the liquid outlet 101, and the second elastic element 24 compresses; when the second spool 13 contacts the check ring 18 and the third spool 15 is spaced from the check ring 18, gas is discharged from the first chamber 21 through the first passage 102, and the second resilient member 24 urges the first spool 22 to move in the first chamber 21 away from the second resilient member 24 to close the liquid outlet 101.

Specifically, the second housing 23, that is, a partial housing of the pneumatic solenoid valve 100 corresponding to the liquid inlet 20, the first housing 12 is located above the second housing 23, one end of the second elastic element 24 is fixedly disposed on an inner wall of an upper portion of the first cavity 21, the other end of the second elastic element 24 is fixedly disposed on the first valve core 22, and the second elastic element 24 is longitudinally retractable on the upper portion of the first cavity 21, so that the first valve core 22 correspondingly ascends or descends in the first cavity 21. When the second valve core 13 is spaced from the retainer 18 and the third valve core 15 is in contact with the retainer 18, that is, the second valve core 13 is opened and the third valve core 15 is closed, high-pressure gas flows from the gas inlet 11 to the second valve core 13, then flows from the second valve core 13 to the first passage 102, flows to the first cavity 21 through the first passage 102, when the high-pressure gas accumulates to a certain volume in the gap between the first valve core 22 and the second housing 23, the first valve core 22 is pushed to move upwards (towards the second elastic element 24) along the first cavity 21, and when the lower end of the first valve core 22 is separated from the second housing 23, the liquid outlet 101 is opened and propellant flows;

when the second valve element 13 is in contact with the retainer ring 18 and the third valve element 15 is spaced from the retainer ring 18, that is, the second valve element 13 is closed and the third valve element 15 is opened, the pneumatic solenoid valve 100 can be in two states, and when no high-pressure gas exists in the first cavity 21, the pneumatic solenoid valve 100 is in a sealed state; when high pressure gas is present in the first chamber 21, the pneumatic solenoid valve 100 is in an exhaust state. In the sealed state, high-pressure gas cannot enter the pneumatic solenoid valve 100 from the outside through the second valve element 13; in the exhaust state, gas flows from the first cavity 21 to the first channel 102, is transmitted from the first channel 102 to the third valve element 15, and finally is exhausted from the pneumatic solenoid valve 100 through the exhaust port 121 communicated with the third valve element 15, since the second elastic element 24 is compressed first, the second elastic element 24 is expanded to generate thrust on the first valve element 22, the first valve element 22 moves downwards (away from the second elastic element 24) along the first cavity 21 under the push of the second elastic element 24, and when the lower end of the first valve element 22 is contacted with the second shell 23, the liquid outlet 101 is closed, and the propellant is cut off.

Exemplarily, in an embodiment of the present invention, the second elastic element 24 may be a spring. One end of the second elastic element 24 may be fixed to the second housing 23 by means of engagement, caulking, screwing, bonding, welding, or the like, and similarly, the other end of the second elastic element 24 may be fixed to the first valve body 22 by means of engagement, caulking, screwing, bonding, welding, or the like. The specific type of the second elastic element 24 and the fixing manner of the second elastic element 24 are only exemplary, and should not be construed as limiting the present invention, and the specific type and arrangement may be selected in specific embodiments.

EXAMPLE six

With reference to fig. 1 and fig. 5, further, the first valve core 22 includes a base 222, a stem 223 and a sealing head 224, the stem 223 is connected to the base 222 and the sealing head 224 at an interval, the second elastic element 24 is fixedly connected to the base 222, the locking groove 221 is disposed on the stem 223, the second housing 23 is provided with a liquid path channel 231, and the sealing head 224 is used for opening or closing the liquid path channel 231 to open or close the liquid outlet 101.

The base 222 is substantially in a round cake shape, the valve rod 223 is substantially in a cylindrical shape, the cross-sectional area of the base 222 is larger than that of the valve rod 223 so as to adapt to different parts of the first cavity 21, the end socket 224 is substantially in a round table shape and can be partially embedded into the liquid outlet 101, the liquid outlet 101 is a circular outlet, and the circular liquid outlet 101 and the round table shaped end socket 224 are matched more closely. The catch groove 221 extends transversely through the valve stem 223. When the high-pressure gas enters the first cavity 21, the high-pressure gas mainly acts on the valve rod 223, and can jack up the valve rod 223 and the base 222 to move upwards, and meanwhile, the valve rod 223 drives the seal head 224 to move upwards, so that the seal head 224 is separated from the liquid outlet 101, namely, the liquid path channel 231 and the liquid outlet 101 are opened; when the high-pressure gas is exhausted from the first chamber 21, the second elastic element 24 acts on the base 222 to push the valve rod 223 and the sealing head 224 to move downwards until the sealing head 224 contacts with the liquid outlet 101 and closes the liquid path channel 231. The liquid path channel 231 is arranged at the lower end of the second shell 23, the opening of the liquid path channel 231 is connected with a propellant source of the aircraft, the outlet of the liquid path channel 231 is the liquid outlet 101, the part of the valve rod 223, which is located in the liquid path channel 231, penetrates through the liquid path channel 231, and the propellant can flow and fill the whole liquid path channel 231.

For example, the first valve core 22 may be formed by integral molding, and the first valve core 22 is easy to manufacture, reduces the number of machining processes, and has better integrity; or, the base 222, the valve rod 223 and the end enclosure 224 are respectively manufactured by the first valve core 22 in a split manner, and then the base 222, the valve rod 223 and the end enclosure 224 are fixedly arranged, so that when the base 222, the valve rod 223 and the end enclosure 224 are damaged, the damaged parts can be correspondingly replaced, and the replaceable use effect of the first valve core 22 is improved.

EXAMPLE seven

Referring to fig. 1 and fig. 5, further, the base 222 is sleeved with a first sealing ring 25, the first sealing ring 25 is connected to the second housing 23, the valve rod 223 is sleeved with a second sealing ring 26, and the second sealing ring 26 is connected to the second housing 23; the first sealing ring 25 and the second sealing ring 26 are used to form a sealing space between the valve rod 223 and the first cavity 21, so that the valve rod 223 is pushed by gas to move towards the second elastic element 24, and the gas is prevented from flowing to the base 222 and/or the sealing head 224 when entering the first cavity 21.

In order to increase the urging force of the high-pressure gas to the valve rod 223, the high-pressure gas needs to be confined to a certain portion of the first chamber 21, so that the high-pressure gas acts on the valve rod 223 in a concentrated manner to move the first valve element 22. If the seat 222 and/or the stem 223 completely contact the inner wall of the first chamber 21 to form a sealed space, when the first valve core 22 moves in the first chamber 21, friction may be large, which may result in that the movement of the first valve core 22 is not smooth enough.

In the embodiment of the invention, the first sealing ring 25 is sleeved on the base 222, the second sealing ring 26 is sleeved on the valve rod 223, when high-pressure gas enters the first cavity 21, the high-pressure gas is limited in a space formed by the first sealing ring 25 and the second sealing ring 26 in a sealing manner, and can be intensively acted on the valve rod 223 and the base 222, so that the high-pressure gas can more effectively push the first valve core 22 to move; the first cavity 21 is partitioned into an upper space, a middle space and a lower space which are relatively independent by the first sealing ring 25 and the second sealing ring 26, and when the first sealing ring 25 and the second sealing ring 26 are disassembled, the upper part, the middle part and the lower part of the first cavity 21 are communicated with each other, namely the first cavity 21 is a whole communicated space.

More specifically, the first sealing ring 25 and the second sealing ring 26 may be made of rubber and have a certain elasticity to be sleeved on the base 222 and the valve rod 223, and the first sealing ring 25 and the base 222, and the second sealing ring 26 and the valve rod 223 may be tightly fitted. The corresponding parts of the base 222 and the valve rod 223 can be provided with grooves surrounding the base 222 and the valve rod 223, the first sealing ring 25 and the second sealing ring 26 are respectively arranged in the two grooves, when the first valve core 22 moves, the first sealing ring 25 and the second sealing ring 26 are not easy to fall off from the base 222 and the valve rod 223 due to friction, the sealing effect is ensured, and the normal movement of the first valve core 22 and the normal circulation of propellant are further ensured.

Example eight

Referring to fig. 1 and 4, further, the air inlet portion 10 further includes a first housing 12, and a second valve core 13, a plunger 14 and a third valve core 15 disposed in the first housing 12, the air inlet 11 is disposed in the first housing 12, the second valve core 13 and the third valve core 15 are disposed opposite to each other, the plunger 14 is fixedly connected to the second valve core 13 and the third valve core 15, and the plunger 14 can drive the second valve core 13 and the third valve core 15 to move simultaneously, so that the air inlet 11 is communicated or not communicated with the first channel 102.

Specifically, the first housing 12, that is, a partial housing of the pneumatic solenoid valve 100 corresponding to the air inlet portion 10, the second valve core 13, the plunger 14, and the third valve core 15 are all accommodated in the first housing 12, and the air inlet 11 is opened on the left side of the first housing 12 and connected to an external air source, so as to connect high-pressure air into the first housing 12. Since the stem 14 is fixedly connected to the second valve element 13 and the third valve element 15, when any one of the three is moved, the other two are moved simultaneously, i.e., moved simultaneously left and right as shown in fig. 4, so that the air inlet 11 is communicated or not communicated with the first passage 102. When the ram 14 drives the second valve core 13 and the third valve core 15 to move to the corresponding positions, so that the gas inlet 11 is communicated with the first channel 102, gas can flow into the first channel 102 and the first cavity 21; when the ram 14 moves the second valve spool 13 and the third valve spool 15 to the corresponding positions so that the gas inlet 11 is not communicated with the first passage 102, gas cannot flow into the first passage 102 and the first cavity 21.

Example nine

With reference to fig. 1 and fig. 6, further, a first opening 35 and a second opening 36 are disposed on the same side of the fixing portion 30, the first blocking element 33 is disposed in the first opening 35, and the plug 373 is disposed in the second opening 36; the clamping rod 32 is sleeved with a third sealing ring 323, the pushing seat 371 is sleeved with a fourth sealing ring 374, the first blocking piece 33 is sleeved with a fifth sealing ring 331, the plug 373 is sleeved with a sixth sealing ring 371, and the third sealing ring 323, the fourth sealing ring 374, the fifth sealing ring 331 and the sixth sealing ring 371 are used for keeping the second cavity 31 and the second channel 34 airtight.

Specifically, the first opening 35 and the second opening 36 are both opened on the right side of the pneumatic solenoid valve 100, and when the clamping rod 32 is not detached and is not moved, the connecting rod 372 and the plug 373 can limit the distance that the clamping rod 32 moves rightwards in the second cavity 31, so as to avoid the clamping rod 32 moving too long. When the high-pressure gas in the pneumatic solenoid valve 100 needs to be completely discharged, the first blocking piece 33 and the second blocking piece 37 can be removed at the same time to open the first opening 35 and the second opening 36, so that the second cavity 31 and the second channel 34 form a passage with the outside, and the discharge efficiency of the high-pressure gas is improved.

In the embodiment of the present invention, the second blocking element 37 is in a threaded configuration, that is, the second blocking element 37 is partially fixed to the fixing portion 30 in a threaded manner, so as to ensure the stability of the second blocking element 37 in the pneumatic solenoid valve 100, prevent the second blocking element 37 from being pushed out due to too high pressure in the pneumatic solenoid valve 100, and ensure the normal operation of the pneumatic solenoid valve 100 and the aircraft. In other embodiments, the second blocking element 37 may have other configurations, such as a snap fit, and the like, and is not limited to the above-mentioned screw fit, and may be specifically configured on the premise of ensuring the stability of the second blocking element 37.

In order to increase the pushing force of the high pressure gas on the clamping rod 32, the high pressure gas needs to be limited to a certain portion of the second cavity 31 (e.g. the right portion of the second cavity 31) so that the high pressure gas acts on the pushing seat 371 in a concentrated manner to move the clamping rod 32. If the rod 32 and/or the push seat 371 completely contact the inner wall of the second cavity 31 to form a sealed space, the rod 32 may not move smoothly due to the large friction force when the rod 32 moves in the second cavity 31.

In the embodiment of the invention, the third sealing ring 323 is sleeved on the clamping rod 32, the fourth sealing ring 374 is sleeved on the pushing seat 371, the fifth sealing ring 331 is sleeved on the first blocking piece 33, the sixth sealing ring 371 is sleeved on the plug 373, when high-pressure gas enters the second cavity 31, the high-pressure gas is limited in a space formed by the fourth sealing ring 374 and the sixth sealing ring 371, and can intensively act on the pushing seat 371, so that the high-pressure gas more effectively pushes the clamping rod 32 to move, the third sealing piece 323 can prevent the high-pressure gas from entering between the clamping rod 32 and the through groove 35 from the first cavity 21, and the fifth sealing piece 331 improves the sealing effect of the first blocking piece 33 on the second channel 34. When the clamping rod 32 is disassembled, the third sealing ring 323 and the fourth sealing ring 374 are disassembled simultaneously; when the first closing member 33 is removed, the fifth seal ring 331 and the sixth seal ring 371 are removed at the same time.

Specifically, the fourth sealing ring 374 separates the second chamber 31 into a left space and a right space which are relatively independent, the third sealing ring 323 and the fourth sealing ring 374 separate the left part of the second chamber 31, and the fourth sealing ring 374 and the fifth sealing ring 325 separate the right part of the second chamber 31; when the fourth sealing ring 374 is removed, the left part and the right part of the second cavity 31 are communicated, that is, the second cavity 31 is a whole communicated space; when the third seal ring 323 is removed, the middle part of the first cavity 21 is communicated with the left part of the second cavity 31; when the fifth sealing ring 331 is removed, the right portion of the second cavity 31 can communicate with the outside.

Furthermore, the third seal ring 323, the fourth seal ring 374, the fifth seal ring 331 and the sixth seal ring 371 may be made of rubber and have a certain elasticity so as to be sleeved on the clamping rod 32, the pushing seat 371, the first blocking member 33 and the plug 373, which are tightly fitted with each other. Still can set up the recess that encircles at the card pole 32, promote seat 371, the corresponding position of first shutoff piece 33 and end cap 373, and set up third sealing washer 323, fourth sealing washer 374, fifth sealing washer 331 and sixth sealing washer 371 in each recess respectively correspondingly, when the card pole 32 removes, third sealing washer 323 and fourth sealing washer 374 are difficult for droing from card pole 32 and promotion seat 371 because of the friction that self removal produced, guarantee sealed effect, further guarantee the normal removal of card pole 32 and the normal circulation of propellant, improve the sealed of first shutoff piece 33 and second shutoff piece 37, stable effect.

Example ten

The aircraft of the embodiment of the invention comprises the pneumatic solenoid valve 100 of any one of the embodiments, and the aircraft is connected with the liquid outlet 101 of the pneumatic solenoid valve 100.

When the aircraft is in ground operation, the clamping rod 32, the third sealing ring 323 and the fourth sealing ring 374 are not present, that is, the clamping rod 32, the third sealing ring 323 and the fourth sealing ring 374 are disassembled, as shown in fig. 2, and in combination with fig. 4 to 7, the matching relationship between the clamping rod 32 and the second blocking piece 37 is shown in fig. 7 a:

when the electromagnetic element 17 is electrified, the electromagnetic element 17 drives the mandril 14 to move leftwards, the second valve core 13 is opened, and the third valve core 15 is closed; high-pressure gas passes through the gas inlet 11, passes through the second valve core 13 and the first shell 12, enters the middle part of the first cavity 21 from the first channel 102, and meanwhile, because the pushing seat 371 is still in the second cavity 31, the right parts of the through groove 35 and the second cavity 31 are sealed, and pressure difference is formed between the upper part and the lower part of the first cavity 21, so that the high-pressure gas can jack up the valve rod 223 and drive the end enclosure 224 to move upwards, the liquid channel 231 is communicated, and propellant flows; when the electromagnetic element 17 is powered off, the first elastic element 16 pushes the carrier rod 14 to move rightwards, the second valve element 13 is closed, the third valve element 15 is opened, high-pressure gas in the first housing 12, the first channel 102 and the first cavity 21 is exhausted through the exhaust port 121, the second elastic element 24 drives the valve rod 223 and the seal head 224 to move downwards, the liquid channel 231 is closed, and the propellant is cut off.

When the aircraft is in flight operation, the first blocking piece 33 and the fifth sealing ring 331 are not present, that is, the first blocking piece 33 and the fifth sealing ring 331 are removed, as shown in fig. 3, and in combination with fig. 4 to 7, the clamping rod 32 and the second blocking piece 37 are in a matching relationship as shown in fig. 7 b:

when the electromagnetic element 17 is electrified, the ejector rod 14 is driven to move leftwards, the second valve core 13 is opened, the third valve core 15 is closed, high-pressure gas enters the first cavity 21 from the first channel 102 through the gas inlet 11, passes through the second valve core 13 and the first shell 12, the valve rod 223 is jacked up, the end enclosure 224 is driven to move upwards, the liquid channel 231 is communicated, and the propellant flows; when the first sealing ring 25 is higher than the third channel 103, the high-pressure gas enters the right portion of the second cavity 31 from the upper portion of the first cavity 21, the connecting rod 372 and the end enclosure 373 are fixed, when the high-pressure gas is accumulated to a certain volume in the second cavity 31, the high-pressure gas acts on the pushing seat 371 to push the clamping rod 32 to enter the clamping groove 221, the first valve core 22 is mechanically fixed, and when the electromagnetic element 17 is powered off, the liquid channel 231 cannot be closed.

The above description is only for the purpose of illustrating the preferred embodiments of the present invention and is not to be construed as limiting the invention, and any modifications, equivalents and improvements made within the spirit and principle of the present invention are intended to be included within the scope of the present invention.

Claims

1. A pneumatic solenoid valve for an aircraft, the aircraft being connected to a liquid outlet of the pneumatic solenoid valve, the pneumatic solenoid valve comprising:

an air inlet part provided with an air inlet;

the fixing part comprises a second cavity, a clamping rod detachably arranged in the second cavity, a first plugging piece and a second channel, the second cavity is communicated with the first cavity through a third channel, and the clamping rod and the first plugging piece are respectively positioned at two ends of the second channel;

2. The pneumatic electromagnetic valve according to claim 1, wherein the fixing portion further defines a through slot, the fixing portion further includes a second blocking member, the second blocking member includes a pushing seat, a plug, and a connecting rod for spacing the plug from the pushing seat, the pushing seat is connected to the clamping rod and movably disposed with respect to the connecting rod and the plug, and the cross-sectional area of the connecting rod is smaller than that of the plug;

when the clamping rod is disassembled, the connecting rod and the plug prop against the pushing seat, and the pushing seat is kept between the through groove and the second cavity, so that the first cavity is not communicated with the second cavity;

when the clamping rod is reserved, the clamping rod is inserted into the through groove, when the first valve core moves towards the second elastic element and the height of the base is higher than that of the third channel, gas enters the second cavity through the third channel and pushes the pushing seat to push the clamping rod to move towards the first valve core until the clamping rod penetrates through the through groove and the clamping groove, and the pushing seat and the connecting rod are spaced and seal the second channel.

3. The pneumatic solenoid valve according to claim 1, wherein the air inlet portion further includes a first housing, and a second valve core, a plunger, and a third valve core disposed in the first housing, the air inlet opening is disposed in the first housing, the second valve core is disposed opposite to the third valve core, the plunger is fixedly connected to the second valve core and the third valve core, and the plunger can drive the second valve core and the third valve core to move simultaneously, so that the air inlet is communicated or not communicated with the first channel.

4. The pneumatic solenoid valve according to claim 3, wherein the air inlet portion further includes a retaining ring disposed in the first housing, the retaining ring defines an air inlet passage, the plunger passes through the air inlet passage, the second valve element and the third valve element are respectively located at two sides of the air inlet passage, and when the plunger drives the second valve element and the third valve element to move simultaneously, the second valve element or the third valve element can contact with the retaining ring;

when the second valve core is in contact with the retainer ring and the third valve core is spaced from the retainer ring, the air inlet channel is closed, and the air inlet is not communicated with the first channel;

when the second valve core is spaced from the retainer ring and the third valve core is contacted with the retainer ring, the air inlet channel is opened, and the air inlet is communicated with the first channel through the air inlet channel.

5. The pneumatic solenoid valve according to claim 4, wherein the air inlet portion further comprises a first elastic element disposed on one side of the second valve core and the electromagnetic element disposed on one side of the third valve core, the plunger is inserted into the third valve core to be movably connected with the electromagnetic element, the electromagnetic element can drive the plunger to move, one end of the first elastic element is fixedly connected with the first housing, and the other end of the first elastic element is fixedly connected with the second valve core;

when the electromagnetic element is electrified, the ejector rod is driven to push the third valve core and the second valve core to move towards the direction close to the first elastic element, and when the second valve core is spaced from the retainer ring and the third valve core is contacted with the retainer ring, the air inlet channel is opened;

when the electromagnetic element is powered off, the first elastic element pushes the second valve core, the ejector rod and the third valve core to move towards the direction away from the first elastic element, and when the second valve core is in contact with the retainer ring and the third valve core is spaced from the retainer ring, the air inlet channel is closed.

6. The pneumatic solenoid valve according to claim 4, wherein the liquid inlet portion further includes a second housing, and a second elastic member connecting the first spool and the second housing, the second housing is connected to the first housing, and the first cavity is opened in the second housing;

when the second valve core is spaced from the retainer ring and the third valve core is contacted with the retainer ring, the gas pushes the first valve core to move towards the second elastic element in the first cavity to open the liquid outlet, and the second elastic element compresses;

when the second valve core is in contact with the retainer ring and the third valve core is spaced from the retainer ring, gas is discharged from the first cavity through the first channel, and the second elastic element pushes the first valve core to move in the first cavity in a direction away from the second elastic element to close the liquid outlet.

7. The pneumatic electromagnetic valve according to claim 6, wherein the first valve core includes a base, a valve rod and a sealing head, the valve rod is spaced between the base and the sealing head, the second elastic element is fixedly connected with the base, the second housing is provided with a liquid path channel, and the sealing head is used for opening or closing the liquid path channel to open or close the liquid outlet.

8. The pneumatic electromagnetic valve according to claim 7, wherein the base is sleeved with a first sealing ring, the valve rod is sleeved with a second sealing ring, the first sealing ring and the second sealing ring are both connected with the second housing, and the first sealing ring and the second sealing ring are used for forming a sealing space between the valve rod and the first cavity, so that the valve rod is pushed by gas to move towards the second elastic element, and the gas is prevented from flowing to the base and/or the end socket when entering the first cavity.

9. The pneumatic solenoid valve according to claim 2, wherein the same side of the fixing portion is provided with a first opening and a second opening which are spaced from each other, the first blocking member is disposed at the first opening, and the plug is disposed at the second opening;

the utility model discloses a stopper, including the kelly, first shutoff piece cover, end cap cover, fourth sealing washer, fifth sealing washer, second cavity and second passageway, the kelly cover is equipped with the third sealing washer, it is equipped with the fourth sealing washer to promote the seat cover, first shutoff piece cover is equipped with the fifth sealing washer, the end cap cover is equipped with the sixth sealing washer, the third sealing washer the fourth sealing washer the fifth sealing washer with the sixth sealing washer is used for making the second cavity with the second passageway keeps airtight.

10. An aircraft comprising a pneumatic solenoid valve according to any one of claims 1 to 9, the aircraft being connected to the outlet of the pneumatic solenoid valve.