阅读说明：本技术 一种压缩气体自动快速释放装置及使用该装置的救生设备 (Compressed gas automatic quick release device and lifesaving equipment using same ) 是由 马凌云 马玲 于 2020-06-30 设计创作，主要内容包括：本发明公开的一种压缩气体自动快速释放装置,包括：一端与压缩气瓶瓶口连接的本体,在本体内设置有烟火腔室和导气腔室；配置在本体内的烟火装置,其接收电信号后引爆,烟火药产生火药气体进入烟火腔室；滑动配置烟火腔室内的一级活塞和滑动配置在导气腔室内的二级活塞,该一级活塞在进入烟火腔室内的火药气体的作用力下,向远离烟火装置的一端运动,二级活塞在一级活塞的推动力和惯性作用下运动,二级活塞运动到压缩气瓶的瓶口位置时,将压缩气瓶瓶口上的封口击破,使预储存在压缩气瓶中的压缩气体释放并从导气腔室上的排气孔排出本体外。本发明还公开了一种具有上述压缩气体自动快速释放装置的救生装置。本发明没有高温灼烧和剧烈噪音风险。(The invention discloses an automatic quick release device of compressed gas, comprising: the gas cylinder comprises a body, a gas cylinder body and a gas guide cavity, wherein one end of the body is connected with a bottle opening of the compressed gas cylinder; the pyrotechnic device is arranged in the body and detonates after receiving the electric signal, and the pyrotechnic powder generates powder gas to enter the pyrotechnic chamber; the one-level piston in the sliding configuration pyrotechnic chamber and the second grade piston of sliding configuration in the air guide chamber, this one-level piston is under the effort of the powder gas that gets into the pyrotechnic chamber, to the one end motion of keeping away from pyrotechnic device, the second grade piston moves under the driving force and the inertia of one-level piston, when the second grade piston moved the bottleneck position of compressed gas bottle, break the sealing on the compressed gas bottle bottleneck, make the compressed gas release of prestore in the compressed gas bottle and discharge this external from the exhaust hole on the air guide chamber. The invention also discloses a lifesaving device with the compressed gas automatic quick release device. The invention has no risk of high-temperature burning and severe noise.)

1. An automatic quick release device for compressed gas, comprising:

the gas cylinder comprises a body, a gas cylinder body and a gas guide cavity, wherein one end of the body is connected with the opening of the compressed gas cylinder;

a pyrotechnic device disposed within the body, the pyrotechnic device receiving an electrical signal and detonating, the pyrotechnic device generating a pyrotechnic charge gas into the pyrotechnic chamber;

slidably positioning a primary piston within said pyrotechnic chamber, the primary piston being movable under the force of the pyrotechnic gas entering said chamber to an end remote from the pyrotechnic device and the range of movement being limited to said pyrotechnic chamber;

the secondary piston is arranged in the air guide cavity in a sliding mode, moves under the action of the driving force and inertia of the primary piston and can reciprocate in the air guide cavity; when the secondary piston moves to the position of the opening of the compressed gas cylinder, the seal on the opening of the compressed gas cylinder is broken, so that compressed gas stored in the compressed gas cylinder in advance is released;

and the air guide chamber is provided with an exhaust hole, and compressed air pre-stored in the compressed air bottle is discharged out of the body from the exhaust hole after being released.

2. An automatic quick release device for compressed gas according to claim 1, wherein the mouth of the pyrotechnic device, the primary piston, the secondary piston and the compressed gas cylinder are coaxially arranged.

3. An automatic quick release device of compressed gas according to claim 2, characterized in that in the initial condition said pyrotechnic device is in contact with said primary piston and said secondary piston is in contact with said primary piston.

4. An automatic quick release device of compressed gas as claimed in claim 3, wherein a pressure relief hole is provided on the chamber wall of said pyrotechnic chamber, said pressure relief hole slowly discharging the pyrotechnic gas entering said pyrotechnic chamber out of the body.

5. An automatic quick release of compressed gas according to claim 4, wherein said pressure relief vent is located behind the initial contact position of said pyrotechnic device with said primary piston and further away from said primary piston than the initial contact position of said pyrotechnic device with said primary piston.

6. An automatic quick release device of compressed gas according to claim 3, characterized in that said primary piston is in clearance fit with the inner wall of said pyrotechnic chamber, and the powder gas entering said pyrotechnic chamber is slowly evacuated into said gas-conducting chamber through the clearance between said primary piston and the inner wall of said pyrotechnic chamber and is discharged outside said body through an exhaust hole.

7. An automatic quick release mechanism for compressed gas as claimed in claim 5 or 6 wherein said vent hole is provided in the wall of said gas directing chamber closer to said compressed gas cylinder than the initial contact position of said secondary piston with said primary piston.

8. The automatic and quick release device of claim 7, wherein a housing is provided outside said body, a gas discharge cavity is provided between the inner wall of said housing and the outer surface of said body, said gas discharge cavity being in communication with said pressure relief hole and said vent hole; the shell is provided with at least one flow guide hole which is communicated with the gas discharge cavity; the powder gas released by the firework device is discharged into the gas discharge cavity through a pressure relief hole or a gap between the primary piston and the inner wall of the firework cavity, an air guide cavity and an exhaust hole; the air released by the compressed air bottle is discharged into the air discharge cavity through the air guide chamber and the air discharge hole; the gas discharge cavity collects all gas, and the gas is guided and distributed through the guide holes in the shell.

9. An automatic quick release device for compressed gas according to claim 3, characterized in that a sealing ring is provided on the wall of the gas conducting chamber, said sealing ring limiting the secondary piston in an initial position when the pyrotechnic device is not fired; the sealing ring is positioned between the initial state contact position of the secondary piston and the primary piston and the exhaust hole.

10. A life saving device comprising the compressed gas automatic quick release apparatus as claimed in any one of claims 1 to 9.

The technical field is as follows:

the invention belongs to the technology of emergency lifesaving of personnel, and particularly relates to an automatic compressed gas quick release device which can be automatically triggered in an emergency and quickly release compressed gas, and lifesaving equipment using the device.

Background

At present, in an inflator used in the emergency lifesaving technology of passengers, gas is pre-stored in a pressure container, and when the gas needs to be released in an emergency, one of common ways is to release the gas by a manual mechanical triggering way (for example, refer to patent document 1); in addition, the firing is triggered by a powder device to push a piston (for example, refer to patent document 2).

Both of the above approaches have certain disadvantages: the former has the problems that the speed is too low, the automatic triggering cannot be realized, and the sensitivity is lower for emergency lifesaving equipment. The latter has the problem of low reliability and excessive sound when the explosive device detonates. The emergency life-saving products for personnel are mostly in a passenger wearing type, and if the device is acted with huge sound and heat, great side effects can be caused. As in the patent document 2 cited herein, after the pyrotechnic device is ignited, the shock wave generated by the chemical reaction of the powder is rapidly released through the exhaust port, and the gas flows to carry the noise and heat generated by the pyrotechnic device, so that the pyrotechnic device is used in a high risk when being worn by a human body.

Disclosure of Invention

The invention aims to solve the problems that the pyrotechnic device is rapid in detonation reaction and huge in energy, so that the pyrotechnic device is mainly used for some devices with rapid reaction. However, due to the high energy density of gunpowder, the process of generating gas by chemical reaction is often accompanied by intense sound and high temperature.

In order to solve the above problems, the present invention has an object to: provided is a gas quick release device which can not generate misoperation, has quick reaction and does not have violent explosion sound and high-temperature gas.

In order to achieve the above object, the automatic quick release device for compressed gas according to the present invention comprises:

the gas cylinder comprises a body, a gas cylinder body and a gas guide cavity, wherein one end of the body is connected with the opening of the compressed gas cylinder;

a pyrotechnic device disposed within the body, the pyrotechnic device receiving an electrical signal and detonating, the pyrotechnic device generating a pyrotechnic charge gas into the pyrotechnic chamber;

slidably positioning a primary piston within said pyrotechnic chamber, the primary piston being movable under the force of the pyrotechnic gas entering said chamber to an end remote from the pyrotechnic device and the range of movement being limited to said pyrotechnic chamber;

the secondary piston is arranged in the air guide cavity in a sliding mode, moves under the action of the driving force and inertia of the primary piston and can reciprocate in the air guide cavity; when the secondary piston moves to the position of the opening of the compressed gas cylinder, the seal on the opening of the compressed gas cylinder is broken, so that compressed gas stored in the compressed gas cylinder in advance is released;

and the air guide chamber is provided with an exhaust hole, and compressed air pre-stored in the compressed air bottle is discharged out of the body from the exhaust hole after being released.

In a preferred embodiment of the invention, the firework device, the primary piston, the secondary piston and the mouth of the compressed gas cylinder are coaxially arranged.

In a preferred embodiment of the invention, in an initial state, the pyrotechnic device is in contact with the primary piston and the secondary piston is in contact with the primary piston.

In a preferred embodiment of the invention, a pressure relief hole is arranged in the chamber wall of the pyrotechnic chamber, and the pressure relief hole slowly discharges gunpowder gas entering the pyrotechnic chamber out of the body.

In a preferred embodiment of the invention, the pressure relief opening is located after the initial state contact position of the pyrotechnic device with the primary piston and further away from the primary piston than the initial state contact position of the pyrotechnic device with the primary piston.

In a preferred embodiment of the invention, the primary piston is in clearance fit with the inner wall of the pyrotechnic chamber, and gunpowder gas entering the pyrotechnic chamber is slowly discharged into the gas guide chamber through the clearance between the primary piston and the inner wall of the pyrotechnic chamber and is discharged out of the body through the gas discharge hole.

In a preferred embodiment of the invention, the bleed orifice is provided in the wall of the gas directing chamber closer to the compressed gas cylinder than the initial state contact position of the secondary piston with the primary piston.

In a preferred embodiment of the invention, a sealing ring is provided on the chamber wall of the gas-conducting chamber, said sealing ring limiting the secondary piston in an initial position when the pyrotechnic device is not detonated; the sealing ring is positioned between the initial state contact position of the secondary piston and the primary piston and the exhaust hole.

In order to facilitate installation, facilitate installation with peripheral lifesaving equipment and seal to achieve the purpose of full utilization of gas, in a preferred embodiment of the invention, a shell is arranged outside the body, a gas discharge cavity is arranged between the inner wall of the shell and the outer surface of the body, and the gas discharge cavity is communicated with the pressure relief hole and the exhaust hole; the shell is provided with at least one flow guide hole which is communicated with the gas discharge cavity; the powder gas released by the firework device is discharged into the gas discharge cavity through a pressure relief hole or a gap between the primary piston and the inner wall of the firework cavity, an air guide cavity and an exhaust hole; the air released by the compressed air bottle is discharged into the air discharge cavity through the air guide chamber and the air discharge hole; the gas discharge cavity collects all gas, and the gas is guided and distributed through the guide holes in the shell.

The lifesaving equipment comprises the compressed gas automatic quick release device.

When the pyrotechnic device is detonated, gas, sound and heat generated by the pyrotechnic device are sealed in the pyrotechnic chamber, and the generated pyrotechnic gas can be exhausted only through the pressure relief hole arranged on the pyrotechnic chamber or through the gap between the primary piston and the inner wall of the pyrotechnic chamber, the air guide chamber and the exhaust hole, so that the transmission of the sound and the heat is isolated.

After the pyrotechnic device is detonated, the primary piston is pushed, the primary piston transmits kinetic energy to the secondary piston, the secondary piston moves towards the compressed gas cylinder along the gas guide chamber under the action of kinetic energy and inertia, the kinetic energy carried by the secondary piston punctures the seal of the compressed gas cylinder, after the seal of the compressed gas cylinder is punctured, compressed gas prestored in the compressed gas cylinder pushes the secondary piston to be far away from the compressed gas cylinder, and the compressed gas is communicated with the exhaust hole, so that the compressed gas is released quickly.

ADVANTAGEOUS EFFECTS OF INVENTION

According to the compressed gas quick release device disclosed by the invention, the puncture of the compressed gas bottle can be quickly completed, and the quick release of gas is realized. And the sound that the pyrotechnic device produced is restricted in certain space can't spread to reach quick release, do not have the effect of high temperature burning and violent noise risk again. The safety device is safer for the use scene that the human body wears or is arranged at a position close to the human body.

Drawings

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

FIG. 1 is a schematic view of an apparatus of comparative patent document 2;

FIG. 2 is a view showing an initial state of the compressed gas quick release apparatus;

FIG. 3 is a state diagram of the compressed gas quick release device when activated;

fig. 4 is a state diagram when compressed gas is rapidly released.

Detailed Description

In order to make the technical means, the creation characteristics, the achievement purposes and the effects of the invention easy to understand, the invention is further explained below by combining the specific drawings.

Fig. 1 is a schematic view of an apparatus of a comparative patent document 2, in which a gas generator 2 includes a hollow main body 22 including a cylindrical horizontal pipe 221, and a pipe or an opening 222 for discharging gas is drawn in the cylindrical horizontal pipe 221. The tube 222 is here cylindrical, but may have other shapes. The longitudinal axis a of the cylindrical horizontal tube 221 and the longitudinal axis B of the tube 222 for the discharge of the gas. The two longitudinal axes A, B are here arranged at 90 °, but other values of inclination of the tube 222 with respect to the cylindrical horizontal tube 221 are possible. Thus, the pipe 222 for discharging the gas may be arranged on an inclined plane with respect to the longitudinal axis a of the cylindrical horizontal pipe 221.

The open end of the cylindrical horizontal pipe 221, positioned to the right of the pipe 222 for the exhaust gases, is intended to receive the neck of the gas cylinder 21 with the appropriate fluid. The fluid contained in the gas cylinder 21 may be in particular a gas such as carbon dioxide (CO2), helium, nitrogen, or any other fluid suitable for allowing the direct expansion of the two expandable safety elements. The neck portion can be screwed into the open end of the cylindrical horizontal tube 221.

The gas dispersion tube, here a flexible tube, is connected at a first end to a fluid supply inlet (not shown) of the inflatable safety element and at a second end to a tube 222 for discharging gas from the gas generator 2.

The gas generator 2 includes, in addition to the gas tank (gas cylinder) 21, a pyrotechnic unit that is installed in the other end of the cylindrical horizontal pipe 221 positioned on the left side of the pipe 222 for discharging gas. This pyrotechnic unit consists of a pyrotechnic charge (or explosive) 23, means 25 for igniting the pyrotechnic charge 23 and a firing pin.

The pyrotechnic charge 23 is in the form of an integral fuel cell (e.g. a propellant) which generates gas by being ignited and by burning. The pyrotechnic charge 23 is located in a combustion chamber 242 arranged inside the firing pin, which makes it possible to limit the encumbrance of the gas generator 2. The combustion chamber 242 leads out into the rear flat surface of the striker, which is in contact with the means for ignition.

A cylindrical firing pin (also called "bullet") is slidably movable according to two opposite directions of the cylindrical horizontal tube 221 and has, in this example, at the front, a shoot-through beveled tip 241 (other shapes, in particular pointed domes, are conceivable) oriented towards the gas cylinder 21. The perforating beveled tip 241 comprises an inclined surface with respect to the longitudinal axis a of the cylindrical horizontal tube 221 and oriented towards the tube for discharging gases 222. The cylindrical perforating tip 241 is surrounded by an annular collar.

In the initial position, this cylindrical projection 241 is located opposite the pipe 222 for the discharge of gas, at a distance from the hermetic seal 211 of the gas cylinder 21.

Although this is not shown in the figures, the gas generator 2 is controlled by a microcontroller/Electronic Control Unit (ECU) which, in case of need (impact force, accident, deceleration beyond a predetermined threshold, etc.), is able to issue a command to trigger the gas generator 2 in the form of an electrical signal transmitted to the means for ignition, in such a way as to provide the expansion of the two inflatable safety elements. The triggering of the expansion during the impact force must of course only be carried out in the case of sufficiently large impact forces. Thus defining a suitable predefined threshold.

Fig. 2 to 4 show a first embodiment of the present invention

The compressed gas quick release device of the present embodiment includes:

a body 8 with one end connected with the mouth of the compressed gas cylinder 6, a firework chamber 4 and an air guide chamber 5 which are communicated with each other are arranged in the body 8, and the air guide chamber 5 is connected with the mouth of the compressed gas cylinder 6;

a pyrotechnic device 1 disposed inside the body 8, the pyrotechnic device 1 being disposed at the other end of the body 8 opposite the compressed gas cylinder 6 and being detonated upon receipt of an electrical signal, the pyrotechnic charge generating a charge gas into the pyrotechnic chamber 4;

a primary piston 2 slidably arranged in the pyrotechnic chamber 5, the primary piston 2 being movable under the force of the pyrotechnic gas entering the pyrotechnic chamber 4 towards an end remote from the pyrotechnic device 1, and the range of movement being limited in the pyrotechnic chamber 4;

the secondary piston 3 in the air guide chamber 5 is arranged in a sliding way, and the secondary piston 3 moves under the action of the driving force and inertia of the primary piston and can reciprocate in the air guide chamber 5; when the secondary piston 3 moves to the opening position of the compressed gas cylinder 6, the seal 6a on the opening of the compressed gas cylinder 6 is broken, so that the compressed gas pre-stored in the compressed gas cylinder 6 is released;

the air guide chamber 5 is provided with an exhaust hole 5c, and compressed air pre-stored in the compressed air cylinder 5c is discharged out of the body through the exhaust hole 5c after being released.

In particular: the pyrotechnic device 1 can be detonated under the excitation of an electric signal, and pyrotechnic gas generated after detonation expands to push the primary piston 2 and the secondary piston 3 to move together towards the gas expansion direction. When the primary piston 2 moves to the bottom of the firework chamber 4, the movement of the primary piston 2 is stopped, and the secondary piston 3 continues to move along the air guide chamber 5 under the action of inertia until a seal 6a at the opening of the compressed gas cylinder 6 is broken. After the compressed gas cylinder 6 is broken, the pre-stored compressed gas is released, so that the secondary piston 3 is pushed to move in the opposite direction, and the compressed gas in the compressed gas cylinder 6 is rapidly released.

In order to better realize the motion relation, the openings of the pyrotechnic device 1, the primary piston 2, the secondary piston 3 and the compressed gas cylinder 6 are coaxially arranged, so that the motion strokes of the primary piston 2 and the secondary piston 3 are shortest, and compressed gas in the compressed gas cylinder 6 can be quickly released.

In the initial state, the pyrotechnic device 1 is in contact with the primary piston 2 and the secondary piston 3 is in contact with the primary piston 2. The chamber 4a of the pyrotechnic chamber 4 is a sliding fit with the primary piston 2 such that the chamber 4a guides the linear movement of the primary piston 2 within the chamber 4a of the pyrotechnic chamber 4. The inner diameter of the cavity 5b of the gas conducting chamber 5 is smaller than the inner diameter of the cavity 4a of the pyrotechnic chamber 4 so that a step surface is formed at the end 4b of the cavity 4a of the pyrotechnic chamber 4. When the primary piston 2 moves to the end 4b, the movement of the primary piston 2 is stopped by the end 4 b. The pyrotechnic chamber 4 and the end face of the primary piston 2 facing the pyrotechnic device 1 together form a relatively closed space 24, in which space 24 the high-temperature, high-pressure gas and sound generated by the pyrotechnic device 1 are enclosed.

More specifically, in order to ensure the safety of the space 24, one of the preferred embodiments of the invention provides a relief orifice 4c in the wall of the pyrotechnic chamber 4 forming the chamber 4a, the relief orifice 4c being located after the initial contact point 9 of the pyrotechnic device 1 with the primary piston 3 and being further away from the primary piston 3 than the initial contact point 9 of the pyrotechnic device 1 with the primary piston 2. The relief hole 4c slowly vents the powder gas entering the cavity 4a of the pyrotechnic chamber 4 out of the body 8. Of course, the pressure relief hole may be formed in the primary piston 2, or the primary piston 2 and the inner wall of the cavity 4a of the pyrotechnic chamber 4 are in clearance fit, so that the powder gas entering the pyrotechnic chamber 4 is slowly discharged into the cavity 5b of the gas guide chamber 5 through the clearance between the primary piston 2 and the inner wall of the cavity 4a of the pyrotechnic chamber 4 and is discharged out of the body 8 through the exhaust hole 5c, and the same effect as that of the preferred embodiment can be achieved.

More specifically, the primary piston 2 and the secondary piston 3 are in an initial state, and should be in close contact with each other to form an initial state contact position 10 of the primary piston 3 and the secondary piston 2 close to the pyrotechnic device 1, so that both the primary piston 2 and the secondary piston 3 can obtain sufficient impact kinetic energy.