CN113819395B

CN113819395B - Motor-driven gas integration valve suitable for underwater projectile

Info

Publication number: CN113819395B
Application number: CN202010559732.XA
Authority: CN
Inventors: 黄磊; 段磊; 张孝石; 彭雪明; 何春涛
Original assignee: Beijing Machinery Equipment Research Institute
Current assignee: Beijing Machinery Equipment Research Institute
Priority date: 2020-06-18
Filing date: 2020-06-18
Publication date: 2023-06-20
Anticipated expiration: 2040-06-18
Also published as: CN113819395A

Abstract

The invention relates to a motor-driven gas integration valve suitable for underwater projectiles, belongs to the technical field of underwater projectiles, and solves the problem that a gas source of an existing underwater projectile is difficult to integrate in a projectile body. The motor-driven gas integration valve includes: the device comprises a switching valve, an inflation valve, a pressure reducing valve, a gas cylinder and a motor; the gas cylinder is a revolution body, the charging valve is arranged at one end of the gas cylinder, and the switching valve is arranged at the other end of the gas cylinder; the pressure reducing valve is arranged at the air outlet end of the switch valve; the switch valve is provided with a piston arranged along the radial direction of the gas cylinder, and the piston controls the switch valve to be opened or closed; the air charging valve, the air bottle, the switch valve and the pressure reducing valve can be pushed to move together relative to the launching device, and meanwhile, the limiting relation between the limiting structure on the launching device and the piston is relieved, so that the piston moves. The invention adopts the external motor time sequence control, opens the switch valve, and integrates the charging valve, the gas cylinder, the switch valve and the pressure reducing valve in a miniaturized way so as to realize the aims of controllable gas triggering ventilation time and gas ventilation flow of the projectile system.

Description

Motor-driven gas integration valve suitable for underwater projectile

Technical Field

The invention relates to the technical field of underwater projectiles, in particular to a motor-driven gas integration valve suitable for the underwater projectiles.

Background

The underwater projectile obtains high initial speed by using a shooting technology, and adopts a gas wrapping technology to reduce drag, so that underwater high-speed navigation is realized to strike and intercept the underwater motion device. Underwater projectiles therefore require self contained gas sources and gas control devices. However, due to the relatively small diameter of the underwater projectile, typically less than 35mm, it is difficult to locate the air source and air control device inside the projectile.

The projectile launching mode generally adopts an adapter constraint launching mode, namely the adapter and the projectile limit the axial position through the locating pin, and meanwhile, the clearance between the outer surface of the projectile and the inner surface of the barrel is compensated, so that the functions of guiding, limiting and reducing friction resistance in the projectile launching process are achieved, and the adapter is automatically separated under the action of liquid resistance after the projectile is launched out of the barrel.

For an underwater projectile system, a certain time is needed for gas to be introduced and flow stabilization is achieved, and the gas flow has a large influence on the drag reduction characteristic of the projectile body, so that the gas source and the gas control device in the projectile body can control the gas triggering ventilation moment and the gas ventilation flow due to the fact that no device can achieve the technical requirements at present.

The existing mode of opening the switch valve by adopting external electromagnetic valve time sequence control realizes the aims of controllable gas triggering ventilation moment and gas ventilation flow of the projectile system. The above method has the problem of size limitation, namely when the limitation size is smaller, the effective area of the electromagnet is smaller, the generated suction force is smaller, and the risk of being incapable of opening the switch valve exists.

Disclosure of Invention

In view of the above analysis, the present invention aims to provide a motor-driven gas integration valve suitable for underwater projectiles, which is used for solving the problem that the gas source and the gas control device of the existing underwater projectiles are difficult to integrate in the projectile body under the premise of small size.

The aim of the invention is mainly realized by the following technical scheme:

in the technical scheme of the invention, the motor-driven gas integration valve suitable for the underwater projectile is characterized by comprising: the device comprises a switching valve, an inflation valve, a pressure reducing valve, a gas cylinder and a motor;

the gas cylinder is a revolution body, the charging valve is arranged at one end of the gas cylinder, and the switching valve is arranged at the other end of the gas cylinder; the pressure reducing valve is arranged at the air outlet end of the switch valve; the switch valve is provided with a piston arranged along the radial direction of the gas cylinder, and the piston controls the switch valve to be opened or closed; the air charging valve, the air bottle, the switch valve and the pressure reducing valve can be pushed to move together relative to the launching device, and meanwhile, the limiting relation between the limiting structure on the launching device and the piston is relieved, so that the piston moves.

In the technical scheme of the invention, the switch valve is provided with an airflow passage, and the airflow passage is communicated with the inside of the gas cylinder and the pressure reducing valve; the airflow passage is provided with a radial section;

the piston is a revolution body and is provided with a first reducing part, and the first reducing part can be inserted into and block the radial section;

the switch valve is also provided with a reset structure, and the reset structure can enable the first reducing part to be in a state separated from the radial section.

In the technical scheme of the invention, the switch valve is provided with a bushing and a bushing mounting hole, the bushing is completely inserted into the bushing mounting hole along the radial direction of the gas cylinder, and the radial section is arranged at the bottom of the bushing mounting hole;

the air flow passage is also provided with an air outlet section which passes through the side wall of the bushing mounting hole and is communicated with the radial section;

the piston is provided with a second reducing part which is arranged in the bushing, and the second reducing part can move in the bushing along the radial direction of the gas cylinder.

In the technical scheme of the invention, the reset structure is a spring in a compressed state, one end of the spring is propped against the edge of the side wall of the radial section, and the other end of the spring is propped against the second reducing part.

In the technical scheme of the invention, the limiting structure comprises: the first ball, the second ball and the annular groove;

the first ball is fixed with one end of the piston, which is far away from the radial section; the outer side wall of the bushing, which is in contact with the launching device, is provided with a ball hole, the second ball is arranged in the ball hole, the first ball and the inner side wall of the launching device are limited, and the limited second ball enables the first reducing part to be inserted into the radial section;

the annular groove is arranged on the inner side wall of the transmitting device and positioned at the position of the ball hole along with the advancing direction of the moving of the switch valve; the second ball can enter the annular groove, and the limit is released, so that the first reducing part is separated from the radial section.

In the technical scheme of the invention, the bushing is provided with a sliding groove along the radial direction of the gas cylinder, and the second diameter-changing part of the piston is provided with a sliding part capable of sliding in the sliding groove.

According to the technical scheme, the first reducing part is provided with the first sealing ring, and the first sealing ring can seal between the first reducing part and the radial part;

the second reducing portion is provided with a second seal ring, and the second seal ring can seal between the second reducing portion and the bushing.

In the technical scheme of the invention, the inflation valve is a one-way valve.

In the technical scheme of the invention, the gas cylinder is made of carbon fiber material, and the maximum gas pressure which can be born is 15MPa.

According to the technical scheme, the pressure reducing valve can adjust the output gas flow.

The technical scheme of the invention can at least realize one of the following effects:

1. the invention adopts the external motor time sequence control, opens the switch valve, and integrates the charging valve, the gas cylinder, the switch valve and the pressure reducing valve in a miniaturized way so as to realize the aims of controllable gas triggering ventilation time and gas ventilation flow of the projectile system.

2. According to the invention, the motor is used for controlling the whole movement, so that the second ball is released from limit, and the piston is used for opening the switching valve, so that the switching valve can be opened at the moment of projectile launching, and the gas in the gas cylinder can be discharged by the gas integration valve, thereby realizing gas drag reduction of the projectile.

3. The invention can still keep gas output after the whole device is launched along with the projectile body through the arrangement of the springs so as to still carry out gas drag reduction after the projectile body is launched.

In the invention, the technical schemes can be mutually combined to realize more preferable combination schemes. Additional features and advantages of the invention will be set forth in the description which follows, and in part will be obvious from the description, or may be learned by practice of the invention. The objectives and other advantages of the invention may be realized and attained by the structure particularly pointed out in the written description and drawings.

Drawings

The drawings are only for purposes of illustrating particular embodiments and are not to be construed as limiting the invention, like reference numerals being used to refer to like parts throughout the several views.

FIG. 1 is a cross-sectional view of an embodiment of the present invention;

FIG. 2 is a cross-sectional view of an on-off valve according to an embodiment of the present invention;

FIG. 3 is a cross-sectional view of an inflation valve according to an embodiment of the present invention.

Reference numerals:

1-a motor; 2-an inflation valve; 201-an inflation joint; 202-a one-way valve; 3-gas cylinder; 4-switching a valve; 401-a base; 402-first balls; 403-second balls; 404-a bushing; 405-a first diameter-changing portion; 406-a second variable diameter portion; 407-a spring; 408-an air inlet section; 409-radial segment; 410-an air outlet section; 5-a pressure reducing valve; 6-transmitting device; 601-an annular groove; 7-a piston;

Detailed Description

The following detailed description of preferred embodiments of the invention is made in connection with the accompanying drawings, which form a part hereof, and together with the description of the embodiments of the invention, are used to explain the principles of the invention and are not intended to limit the scope of the invention.

In describing embodiments of the present invention, it should be noted that, unless explicitly stated and limited otherwise, the term "coupled" should be interpreted broadly, for example, as being fixedly coupled, as being detachably coupled, as being integrally coupled, as being mechanically coupled, as being electrically coupled, as being directly coupled, as being indirectly coupled via an intermediate medium. The specific meaning of the above terms in the present invention can be understood by those of ordinary skill in the art according to the specific circumstances.

The terms "top," "bottom," "above … …," "below," and "on … …" are used throughout the description to refer to the relative positions of components of the device, such as the relative positions of the top and bottom substrates inside the device. It will be appreciated that the devices are versatile, irrespective of their orientation in space.

The invention provides a motor-driven small gas integrated valve suitable for underwater projectiles, which adopts a mode that a motor 1 drives a switch valve 4 to be opened, realizes the aim of controllable gas triggering ventilation moment and gas ventilation flow of a projectile system, and simultaneously solves the problem of limited size of an electromagnetic switch.

Specifically, as shown in fig. 1 to 3, a motor-driven gas integration valve suitable for an underwater projectile includes: the gas-liquid separator comprises a switching valve 4, an inflation valve 2, a pressure reducing valve 5, a gas cylinder 3 and a motor 1; the gas cylinder 3 is a revolution body, the charging valve 2 is arranged at one end of the gas cylinder 3, and the switching valve 4 is arranged at the other end of the gas cylinder 3; the pressure reducing valve 5 is arranged at the air outlet end of the switch valve 4; the switch valve 4 is provided with a piston 7 arranged along the radial direction of the gas cylinder 3, and the piston 7 controls the switch valve 4 to be opened or closed; the motor 1 can push the charging valve 2, the gas cylinder 3, the switching valve 4 and the pressure reducing valve 5 to move together relative to the launching device 6, and simultaneously, the limiting relation between the limiting structure on the launching device 6 and the piston 7 is released, so that the piston 7 moves. When the embodiment of the invention is used, the inflation valve 2 is used for inflating, so that the gas cylinder 3 stores high-pressure gas, at the moment, the piston 7 enables the switch valve 4 to be in a closed state, when the projectile body is launched, the motor 1 is started, the motor 1 pushes the inflation valve 2, the gas cylinder 3, the switch valve 4 and the pressure reducing valve 5 to move together relative to the launching device 6, and meanwhile, the piston 7 also moves relative to the launching device 6 until the limiting relation with the limiting structure on the launching device 6 is released, so that the piston 7 opens the switch valve 4, gas in the gas cylinder 3 flows to the pressure reducing valve 5 through the switch valve 4, and the pressure is regulated to be at proper pressure through the pressure reducing valve 5, so that stable gas flow is formed, and the gas drag reduction of the projectile body is realized.

In the embodiment of the invention, the motor 1 is arranged on the projectile launching device 6, and the projectile launching device 6 is an adapter or a projectile launching gun barrel, so that the existing product can be used, and a cable of the motor 1 is led out from a barrel wall or a gun barrel pipeline. The motor 1 acts to move the charge valve 2, gas cylinder 3, on-off valve 4 and pressure relief valve 5 together with respect to the firing device 6 to provide the required force.

The pressure reducing valve 5 is also a mature product, and the air inlet end of the pressure reducing valve 5 is connected with the air outlet section 410 of the switch valve 4 by adopting threads, and is sealed. The pressure reducing valve 5 is used for adjusting the pressure of the gas outflow side, so as to adjust the gas flow, and achieve the purpose of stable and controllable gas flow.

In order to cooperate with the control of the piston 7, in the embodiment of the invention, the switch valve 4 is provided with an airflow passage which is communicated with the inside of the gas cylinder 3 and the pressure reducing valve 5; the airflow path comprises an air inlet section 408, a radial section 409 and an air outlet section 410 which are connected in sequence; the air inlet section 408 is in threaded connection with the air outlet section 410 of the air cylinder 3, and is in sealed arrangement, and the air outlet section 410 is connected with the pressure reducing valve 5. The piston 7 is a revolution body, the axis of the piston 7 is arranged along the radial direction of the gas cylinder 3, the piston 7 is provided with a first reducing part 405, the first reducing part 405 can be inserted into and block the radial section 409, when the first reducing part 405 is inserted into the radial section 409, the air flow passage is blocked, the on-off valve 4 is in a closed state, when the first reducing part 405 is separated from the radial section 409, the air flow passage is unblocked, and the on-off valve 4 is in an open state.

The switch valve 4 is further provided with a reset structure, the reset structure can enable the first reducing portion 405 to be in a state separated from the radial section 409, namely, when the piston 7 is limited, the switch valve 4 is closed, when the projectile body is launched, the motor 1 is started, the piston 7 is released from limiting structure to limit, and under the action of the reset structure, the first reducing portion 405 is separated from the radial section 409.

In the embodiment of the invention, the switch valve 4 is provided with a bushing 404 and a bushing 404 mounting hole, the bushing 404 is completely inserted into the bushing 404 mounting hole along the radial direction of the gas cylinder 3, a radial section 409 is arranged at the bottom of the bushing 404 mounting hole, the bushing 404 is used as a motion constraint structure, specifically, the piston 7 is provided with a second reducing part 406, the second reducing part 406 is installed in the bushing 404, and the second reducing part 406 can move along the radial direction of the gas cylinder 3 in the bushing 404. In addition, to ensure a clear flow path, gas outlet section 410 passes through the sidewall of the mounting hole of liner 404 and communicates with radial section 409.

In order to simplify the whole device, in the embodiment of the invention, the return structure is a spring 407 in a compressed state, one end of the spring 407 abuts against the side wall edge of the radial section 409, and the other end abuts against the second reducing portion 406, and when the piston 7 is not acted on by the limiting structure, the spring 407 pushes the first reducing portion 405 of the piston 7 away from the radial section 409.

Because the device of the invention is arranged in the projectile body, when the projectile body is separated from the launching device and the motor 1 cannot be launched together with the projectile body, the embodiment of the invention is provided with the limit structure to enable the switch valve 4 to be in an open state, and the locking structure comprises the limit structure comprising: a first ball 402, a second ball 403 and an annular groove 601; the first ball 402 is fixed to the end of the piston 7 remote from the radial section 409; the outer side wall of the bushing 404, which is in contact with the launching device 6, is provided with a ball hole, the second ball 403 is arranged in the ball hole and is limited by the first ball 402 and the inner side wall of the launching device 6, and the limited second ball 403 causes the first diameter-changing portion 405 to be inserted into the radial section 409. Before the projectile is launched, the second ball 403 is pressed into the ball hole due to the restriction of the inner side wall of the launching device 6, at this time, the second ball 403 presses the first ball 402, and the first ball 402 presses the first diameter-variable portion 405 of the piston 7 into the radial segment 409 against the thrust of the spring 407, so that the on-off valve 4 is in a closed state. The annular groove 601 is arranged on the inner side wall of the launching device 6 at a position in the advancing direction of the ball hole along with the movement of the on-off valve 4; the second balls 403 can enter the annular groove 601 and release the restriction, disengaging the first diameter-changing portion 405 from the radial segment 409. When the motor 1 pushes the charging valve 2, the gas cylinder 3, the switching valve 4 and the pressure reducing valve 5 to move together relative to the launching device 6, the second ball 403 rolls between the first ball 402 and the inner side wall of the launching device 6 until the second ball 403 moves to the annular groove 601 along with the switching valve 4, the second ball 403 is released, the spring 407 pushes the piston 7, the piston 7 pushes the second ball 403 through the first ball 402, so that the second ball 403 enters the annular groove 601, the first variable diameter part 405 of the piston 7 is separated from the radial part, the opening of the switching valve 4 is realized, the second ball 403 stays in the annular groove 601 along with the further movement of the switching valve 4, and the first ball 402 keeps stable through the limiting action of the bushing 404, the piston 7 and the spring 407, and keeps the first variable diameter part 405 separated from the radial part 409, at this time, even if the elastic body is separated from the launching device 6, the motor 1 does not push the charging valve 2, the gas cylinder 3, the switching valve 4 and the pressure reducing valve 5 together move relative to the launching device 6, the piston 7 is pushed by the spring 407, and the first variable diameter part 405 is kept in a smooth state, and the air flow path is kept.

Since the piston 7 is a revolution body, in order to prevent the piston 7 from rotating, in the embodiment of the present invention, the bushing 404 is provided with a sliding groove along the radial direction of the gas cylinder 3, and the second diameter-changing portion 406 of the piston 7 is provided with a sliding portion capable of sliding in the sliding groove.

In view of the fact that the device of the present invention is used for the launching of underwater projectiles, it is desirable to prevent the ingress of liquids and, in addition, to prevent the leakage of gases from other locations. In the embodiment of the present invention, the first reducing portion 405 is provided with a first sealing ring, and the first sealing ring can seal between the first reducing portion 405 and the radial section 409; the second reducing portion 406 is provided with a second seal ring, and the second seal ring can seal between the second reducing portion 406 and the bushing 404.

In addition, the switch valve 4 is also provided with a base 401, the base 401 of the switch valve 4 is in a revolving structure, one end of the base 401 is in threaded sealing connection with the gas cylinder 3, one end of the base 401 of the switch valve 4 is in threaded sealing connection with the pressure reducing valve 5, and the base 401 of the switch valve 4 is provided with a gas outlet pipeline. The bushing 404 is fixed to the base 401 of the on-off valve 4 by screws or bonding. The base 401, the piston 7 and the bushing 404 of the on-off valve 4 are made of aluminum alloy material, preferably magnesium alloy material, so as to reduce weight, and the spring 407 is made of spring steel material.

In the embodiment of the invention, the inflation valve 2 is composed of an inflation connector 201 and a one-way valve 202, wherein the inflation connector 201 and the one-way valve 202 are made of aluminum alloy materials, and preferably magnesium alloy materials, so that the weight is reduced. The inflation connector 201 is in threaded sealing connection with the one-way valve 202, and one end of the inflation connector 201 is in threaded sealing connection with one end of the gas cylinder 3. In the process of inflation, the joint of the inflation valve 2 is connected with an inflation pipeline, the one-way valve 202 is used for realizing one-way flow of gas, when the lateral pressure of the joint of the inflation valve 2 is larger than the lateral pressure of the gas cylinder 3, the one-way valve 202 is in an open state, and when the lateral pressure of the joint of the inflation valve 2 is smaller than the lateral pressure of the gas cylinder 3, the one-way valve 202 is in a closed state.

It should be noted that, the gas cylinder 3 is a revolving body structure, and the size of the gas cylinder 3 can be adjusted according to the gas quality requirement. The gas cylinder 3 is made of stainless steel material, and the gas cylinder 3 is preferably made of carbon fiber composite material so as to reduce weight. One end of the gas cylinder 3 is in threaded sealing connection with the inflation valve 2, and the other end is in threaded sealing connection with the switching valve 4. The gas cylinder 3 is used for storing high-pressure gas, and the maximum pressure of the stored gas is 15MPa.

When using the embodiments of the present invention:

firstly, the gas cylinder 3 is inflated, after the joint of the inflation valve 2 is connected with an inflation pipeline, the gas cylinder 3 is inflated, at the moment, the lateral pressure of the joint of the inflation valve 2 is larger than the lateral pressure of the gas cylinder 3, the one-way valve 202 is in an open state, after the pressure in the gas cylinder 3 reaches the set pressure, the inflation is stopped, the gas pressure in the inflation pipeline is removed, at the moment, the lateral pressure of the gas cylinder 3 is larger than the lateral pressure of the joint of the inflation valve 2, and the one-way valve 202 is in a closed state. Further, due to the restriction of the inner side wall of the launching device 6, the second ball 403 is pressed into the ball hole, and the first diameter-changing portion 405 is pressed into the radial section 409 against the urging force of the spring 407, so that the on-off valve 4 is closed.

Before the underwater launch, the initial state motor 1 is not energized and the spring 407 is in a compressed state; the piston 7 is inserted into the radial segment 409 by the first reducing part 405 under the action of the second ball 403, and the first seal ring seals between the first reducing part 405 and the radial segment 409, thereby sealing the airflow passage, and closing the on-off valve 4.

When the underwater launching is carried out, the motor 1 is electrified to push the charging valve 2, the gas cylinder 3, the switching valve 4 and the pressure reducing valve 5 to move together relative to the launching device 6 until the second ball 403 moves to the annular groove 601 along with the switching valve 4, the second ball 403 is released from limit, the spring 407 pushes the piston 7 and the piston 7 to push the second ball 403 through the first ball 402, so that the second ball 403 enters the annular groove 601, the first variable diameter part 405 of the piston 7 is separated from the radial part, the opening of the switching valve 4 is realized, the second ball 403 stays in the annular groove 601 along with the further movement of the switching valve 4, and the first ball 402 keeps stable through the limit effect of the bushing 404, the piston 7 and the spring 407, and keeps the first variable diameter part 405 separated from the radial section 409, namely the switching valve 4 keeps an open state.

When the switch valve 4 is opened, high-pressure gas in the gas cylinder 3 flows to the pressure reducing valve 5 through the gas flow passage, the pressure reducing valve 5 is stable in output gas flow pressure, and in addition, the pressure reducing valve 5 is further provided with an adjusting capability, so that the output end pressure can be controlled, and then the output gas flow is adjusted, so that the gas can be stably output, and the effect of reducing the gas flow resistance can be kept stable in the process of transmitting and after the projectile body is ensured, so that the judgment of the advancing track of the projectile body is facilitated.

In summary, the embodiment of the invention provides a motor-driven gas integration valve suitable for underwater projectiles, which adopts the external motor 1 to control time sequence, opens the switch valve 4, and miniaturizes the integrated inflation valve 2, the gas cylinder 3, the switch valve 4 and the pressure reducing valve 5, so as to realize the aims of controllable gas triggering ventilation moment and gas ventilation flow of the projectile system; according to the invention, the motor 1 is adopted to control the whole movement, so that the second ball 403 is released from limit, and then the piston 7 opens the switch valve 4, so that the switch valve 4 can be opened at the moment of projectile launching, and the gas in the gas cylinder 3 can be discharged by the gas integration valve, thereby realizing gas drag reduction of the projectile; the invention can still keep gas output after the whole device is launched along with the projectile body by arranging the springs 407 so as to still carry out gas drag reduction after the projectile body is launched.

The present invention is not limited to the above-mentioned embodiments, and any changes or substitutions that can be easily understood by those skilled in the art within the technical scope of the present invention are intended to be included in the scope of the present invention.

Claims

1. A motor-driven gas integration valve adapted for use with an underwater projectile, the motor-driven gas integration valve adapted for use with an underwater projectile comprising: the device comprises a switch valve (4), an inflation valve (2), a pressure reducing valve (5), a gas cylinder (3) and a motor (1), wherein the pressure reducing valve (5) can adjust the output gas flow so as to form stable gas flow and is used for reducing the resistance of the gas of a projectile body;

the gas cylinder (3) is a revolving body, the inflation valve (2) is arranged at one end of the gas cylinder (3), and the switch valve (4) is arranged at the other end of the gas cylinder (3); the pressure reducing valve (5) is arranged at the air outlet end of the switch valve (4); the switch valve (4) is provided with a piston (7) arranged along the radial direction of the gas cylinder (3), and the piston (7) controls the switch valve (4) to be opened or closed; the motor (1) can push the charging valve (2), the gas cylinder (3), the switching valve (4) and the pressure reducing valve (5) to move together relative to the emission equipment (6), and meanwhile, the limiting relation between a limiting structure on the emission equipment (6) and the piston (7) is relieved, so that the piston (7) moves;

the switch valve (4) is provided with an air flow passage which is communicated with the inside of the air bottle (3) and the pressure reducing valve (5); the air flow passage is provided with a radial section (409); the piston (7) is a revolution body and is provided with a first reducing part (405), and the first reducing part (405) can be inserted into and block the radial section (409);

the on-off valve (4) is further provided with a bushing (404) and a bushing (404) mounting hole, the bushing (404) is completely inserted into the bushing (404) mounting hole along the radial direction of the gas cylinder (3), and the radial section (409) is arranged at the bottom of the bushing (404) mounting hole;

the switching valve (4) is also provided with a base (401), the base (401) of the switching valve (4) is of a revolving body structure, one end of the base is in threaded sealing connection with the gas cylinder (3), the other end of the base is in threaded sealing connection with the pressure reducing valve (5), and the bushing (404) is fixed with the base (401) of the switching valve (4) through a screw or an adhesive mode;

the limit structure comprises: a first ball (402), a second ball (403) and an annular groove (601); the first ball (402) is fixed with one end of the piston (7) far away from the radial section (409); the outer side wall of the bushing (404) contacted with the launching device (6) is provided with a ball hole, the second ball (403) is arranged in the ball hole, the first ball (402) and the inner side wall of the launching device (6) are limited, and the limited second ball (403) enables the first reducing part (405) to be inserted into the radial section (409); the annular groove (601) is arranged on the inner side wall of the launching device (6) and positioned at the position of the ball hole along with the advancing direction of the moving of the switch valve (4); the second ball (403) can enter the annular groove (601) and release the limit, so that the first reducing part (405) is separated from the radial section (409);

the first reducing part (405) is provided with a first sealing ring, and the first sealing ring can seal between the first reducing part (405) and the radial part;

the switch valve (4) is further provided with a reset structure, and the reset structure can enable the first reducing part (405) to be in a state of being separated from the radial section (409);

the air flow passage is further provided with an air outlet section (410), and the air outlet section (410) penetrates through the side wall of the mounting hole of the bushing (404) and is communicated with the radial section (409);

the piston (7) is further provided with a second reducing part (406), the second reducing part (406) is arranged in the bushing (404), and the second reducing part (406) can move radially along the gas cylinder (3) in the bushing (404);

the second diameter-changing portion (406) is provided with a second seal ring, and the second seal ring can seal between the second diameter-changing portion (406) and the bushing (404).

2. Motor-driven gas integration valve suitable for underwater projectiles according to claim 1, characterized in that said return structure is a spring (407) in compressed state, one end of said spring (407) bearing against the side wall edge of the radial segment (409) and the other end against the second reducing (406).

3. Motor-driven gas integration valve for underwater projectiles according to claim 1, characterized in that the bushing (404) is provided with a chute along the radial direction of the cylinder (3), the second reducing portion (406) of the piston (7) being provided with a sliding portion slidable in the chute.

4. A motor-driven gas integration valve suitable for use in underwater projectiles according to any one of claims 1 to 3, wherein the inflation valve (2) is a one-way valve (202).

5. Motor-driven gas integration valve suitable for underwater projectiles according to claim 1, characterized in that said gas cylinder (3) is made of carbon fiber material, able to withstand a maximum gas pressure of 15MPa.