阅读说明：本技术 一种形状记忆合金隔离阀 (Shape memory alloy isolating valve ) 是由 魏阳国 于 2020-06-24 设计创作，主要内容包括：本发明公开了一种形状记忆合金隔离阀,包括内部设有通道的阀体,通道内设有将通道隔断的隔离膜片,隔离膜片的一侧设有弹簧,弹簧的另一端与阀体连接,弹簧的材质为形状记忆合金；本发明通过在通道中设有将通道隔断的隔离膜片,隔离膜片能够阻断流体在通道内的流通,起到隔离的作用,隔离膜片完好的时候隔离阀处于关闭状态,当弹簧受热时,形状记忆合金的物理特性能够导致弹簧发生形变,弹簧向前延伸,隔离膜片受到来自弹簧向前的弹力逐渐增大,当弹簧向前对隔离膜片的弹力达到一定的数值时,隔离膜片便会破裂损坏,此时通道不受隔离膜片的阻断,隔离阀便会处于打开状态。(The invention discloses a shape memory alloy isolation valve, which comprises a valve body, wherein a passage is arranged in the valve body, an isolation diaphragm for isolating the passage is arranged in the passage, one side of the isolation diaphragm is provided with a spring, the other end of the spring is connected with the valve body, and the spring is made of shape memory alloy; according to the invention, the isolation diaphragm is arranged in the channel to isolate the channel, the isolation diaphragm can block the circulation of fluid in the channel to play an isolation role, the isolation valve is in a closed state when the isolation diaphragm is intact, when the spring is heated, the spring can be deformed due to the physical characteristics of the shape memory alloy, the spring extends forwards, the forward elastic force of the spring on the isolation diaphragm is gradually increased, when the forward elastic force of the spring on the isolation diaphragm reaches a certain value, the isolation diaphragm can be broken and damaged, at the moment, the channel is not blocked by the isolation diaphragm, and the isolation valve is in an open state.)

1. The utility model provides a shape memory alloy isolating valve which characterized in that, includes the inside valve body that is equipped with the passageway, be equipped with the isolation diaphragm that cuts off the passageway in the passageway, one side of isolation diaphragm is equipped with the spring, the other end of spring with the valve body is connected, the material of spring is shape memory alloy.

2. The shape memory alloy isolation valve of claim 1 wherein said valve body is made of a non-metal material.

3. A shape memory alloy isolation valve as claimed in claim 2, wherein an electromagnetic heater is provided on the outside of said valve body at a position corresponding to said spring.

4. The shape memory alloy isolation valve of claim 1, wherein a heater is provided at an outer side of the valve body, a through hole communicating with the passage is provided at one end of the valve body, the other end of the spring passes through the through hole and is connected to the heater, and the spring is in close contact with an inner wall of the through hole.

5. The shape memory alloy isolation valve of claim 4 wherein a sealant is disposed between said through hole and said spring.

6. The shape memory alloy isolation valve of claim 5 wherein an insulating layer is provided on the outer surface of said spring.

7. A shape memory alloy isolation valve according to any of claims 1 to 6, wherein the isolation diaphragm is formed of a brittle material.

8. The shape memory alloy isolation valve of claim 7 wherein said isolation diaphragm is scored.

9. The shape memory alloy isolation valve of claim 8 wherein said score is a circular score or a radial score.

10. The shape memory alloy isolation valve of claim 1, wherein said shape memory alloy is a CuZnAl alloy.

Technical Field

The invention belongs to the field of isolation valves for liquid rocket engine storage systems, and particularly relates to a shape memory alloy isolation valve.

Background

The isolation valve has high sealing reliability, generally works at one time, is usually arranged in a liquid path or a gas path of a missile or rocket engine and is used for isolating propellant or high-pressure gas before the missile or rocket works; the existing isolation valve usually adopts a diaphragm type scheme which can meet the zero leakage requirement, and utilizes an electric detonator as a working energy source; when the isolating valve works, the electric detonator is electrified to detonate the solid powder charge column in the electric detonator to generate hot gas which directly or indirectly breaks the diaphragm, and a new channel is formed in the isolating valve, so that the isolating valve is changed from a closed state to an open state.

However, the isolation valve electric explosion tubes are internally provided with the solid powder charge columns, so that certain dangers exist, and certain failure rate exists during working, so that certain isolation valves adopt two sets of electric explosion tubes to realize redundancy to improve working reliability; however, the high-temperature and high-pressure gas generated by the electric explosion tube of the isolation valve in the valve can cause the damage of the valve shell structure or the failure of the sealing, thereby causing the task failure.

The isolation valve electric detonator has higher requirements on working conditions required by the self work, and the required detonating equipment also has certain volume and weight, which is not friendly to some novel aircrafts with smaller structural mass and space, and increases the weight redundancy of the aircrafts.

Disclosure of Invention

The invention aims to overcome the defects of the prior art, and provides the shape memory alloy isolation valve which is simple in structure, high in reliability and capable of eliminating potential safety hazards existing in the original scheme.

In order to solve the technical problem, the invention provides a shape memory alloy isolation valve which comprises a valve body, wherein a channel is arranged in the valve body, an isolation diaphragm for isolating the channel is arranged in the channel, a spring is arranged on one side of the isolation diaphragm, the other end of the spring is connected with the valve body, and the spring is made of shape memory alloy.

Furthermore, the valve body is made of nonmetal.

Further, an electromagnetic heater is arranged on the outer side of the valve body at a position corresponding to the spring.

Further, the outside of valve body is equipped with the heater, the one end of valve body be equipped with the through-hole of passageway intercommunication, the other end of spring pass the through-hole and with heater connection, just the spring with in close contact with between the through-hole inner wall.

Furthermore, a sealant is arranged between the through hole and the spring.

Furthermore, an insulating layer is arranged on the outer surface of the spring.

Furthermore, the isolation diaphragm is made of a brittle material.

Furthermore, the isolation diaphragm is provided with notches.

Further, the nicks are circular nicks or radial nicks.

Further, the shape memory alloy is CuZnAl alloy.

The invention has the following beneficial effects:

according to the invention, the isolating diaphragm for isolating the passage is arranged in the passage in the valve body, the spring is arranged on one side of the isolating diaphragm, the spring is made of shape memory alloy, the other end of the spring is connected to the inner wall of the valve body, the isolating diaphragm can block the circulation of fluid in the passage to play an isolating role, the isolating valve is in a closed state when the isolating diaphragm is intact, when the spring is heated, the spring can be deformed due to the physical characteristics of the shape memory alloy, the spring extends forwards, the isolating diaphragm is gradually increased by the forward elastic force of the spring, when the forward elastic force of the spring on the isolating diaphragm reaches a certain value, the isolating diaphragm can be broken and damaged, at the moment, the passage is not blocked by the isolating diaphragm, and the isolating valve is in an open state; the valve body does not need to be additionally provided with a gas actuating cylinder, so that the structural reliability is high; the valve is actuated by adopting the physical characteristics of the memory alloy, the traditional electric explosion tube is cancelled, no chemical reaction is involved, no vibration impact exists, no high-temperature gas is generated, the working reliability is high, and the safety is good.

Drawings

The accompanying drawings, which are included to provide a further understanding of the invention and are incorporated in and constitute a part of this application, illustrate embodiment(s) of the invention and together with the description serve to explain the principles of the invention:

FIG. 1 is a schematic view of a shape memory alloy isolation valve according to example 1;

FIG. 2 is a schematic view of a shape memory alloy isolation valve according to embodiment 2;

FIG. 3 is a schematic illustration of different scores on a release film in an example embodiment.

Detailed Description

For a fuller understanding of the technical content of the present invention, reference should be made to the following detailed description taken together with the accompanying drawings.