点火安全保险机构

Abstract

本申请涉及火箭发动机点火技术领域，尤其是涉及一种点火安全保险机构，包括本体、两个储气罩、电控点火单元、保险堵头单元、活塞和电磁动作执行单元；本体的内部设置有滑动腔室，滑动腔室的两端开口分别位于本体相对立的两个端面上，活塞沿滑动腔室的轴向滑动装配于滑动腔室内，电磁动作执行单元和其中一个储气罩分别密封连接于本体相对立的两个端面上，电磁动作执行单元的局部与活塞相连接，电磁动作执行单元用于驱使活塞在第一位置和第二位置之间来回滑动；本体内设置有第一通道、第二通道和第三通道，活塞内设置T形通道和L形通道。本申请可以有效防止误点火的风险，可靠性非常好且安全，适应点火后的各种强大的冲击力，耐用且运行更稳定。

Description

Technical Field

[0001] This application relates to the field of rocket engine ignition technology, and in particular to an ignition safety insurance mechanism. Background Technology

[0002] A solid propellant rocket engine is a chemical rocket engine that uses solid propellant. It is also called a solid propellant rocket engine. After the solid propellant is ignited, it burns in the combustion chamber, converting chemical energy into heat energy and producing high-temperature, high-pressure combustion products. These products flow through the nozzle, where they expand and accelerate, converting heat energy into kinetic energy, and are expelled at high speed from the nozzle to generate thrust.

[0003] A solid rocket motor consists of a propellant grain, a combustion chamber, a nozzle assembly, and an ignition device. The propellant grain is a hollow cylinder made of propellant and a small amount of additives (the hollow part is the combustion surface, and its cross-sectional shape can be circular, star-shaped, etc.). The propellant grain is placed in the combustion chamber (generally the engine casing). During propellant combustion, the combustion chamber must withstand temperatures of 2500–3500 degrees Celsius and pressures of 10²–2 × 10⁷ bar, therefore it must be made of high-strength alloy steel, titanium alloy, or composite materials, and a heat-insulating liner is installed between the propellant grain and the inner combustion chamber wall.

[0004] The igniter is the starting device for a solid rocket engine. It is the most dangerous and most prone to failure component. An igniter generally consists of an electric ignition tube, propellant, and a connecting seat.

[0005] A Chinese patent application with application number 201911137927.9 discloses an electromagnetic mechanical safety solid rocket engine igniter. An electromagnetic mechanical safety device is placed in the gas ignition channel between the ignition tube and the ignition cartridge in the igniter. The opening and closing of the gas ignition channel is controlled by an electrical signal through the electromagnetic mechanical safety device. The electromagnetic mechanical safety device mainly consists of an electromagnetic chuck, an electromagnetic chuck power supply cable, a gas ignition channel valve, and a spring. The electromagnetic mechanical safety device is placed in a connecting seat, with the electromagnetic chuck fixed to the connecting seat. One end of the spring is fixed to the connecting seat, and the other end is fixed to the gas channel valve. The gas channel valve can reciprocate within the connecting seat under the action of the electromagnetic chuck and the spring. A gas ignition channel is provided within the gas channel valve.

[0006] Regarding the aforementioned related technologies, the inventors believe that the following defects exist:

[0007] Conventional ignition safety mechanisms use only springs to connect the channel converter, which cannot withstand impacts and vibrations. This makes them prone to changes in state due to impacts and vibrations, posing a significant safety hazard. In the safe state, the igniter outlet is simply blocked. However, if ignition occurs accidentally, the high-temperature and high-pressure gas has no way to escape, which can easily cause the entire mechanism to explode. Summary of the Invention

[0008] This application provides an ignition safety mechanism to improve the following technical problems:

[0009] Conventional ignition safety mechanisms use only springs to connect the channel converter, which cannot withstand impacts and vibrations. This makes them prone to changes in state due to impacts and vibrations, posing a significant safety hazard. In the safe state, the igniter outlet is simply blocked. However, if ignition occurs accidentally, the high-temperature and high-pressure gas has no way to escape, which can easily cause the entire mechanism to explode.

[0010] This application provides an ignition safety mechanism, which adopts the following technical solution:

[0011] An ignition safety mechanism includes a main body, two gas storage hoods, an electronically controlled ignition unit, a piston, an electromagnetic actuation unit, and a safety plug unit;

[0012] The body has a sliding chamber inside, with the openings at both ends of the sliding chamber located on two opposite end faces of the body. The piston is slidably assembled in the sliding chamber along the axial direction of the sliding chamber. A gap is left between the piston and the inner wall of the sliding chamber to achieve a micro-sealed sliding connection between the two. The electromagnetic actuator and one of the gas storage covers are respectively sealed and connected to the two opposite end faces of the body. A portion of the electromagnetic actuator is connected to the piston. The electromagnetic actuator is used to drive the piston to slide back and forth between a first position and a second position.

[0013] The body is provided with a first channel, a second channel and a third channel. The first channel and the second channel are respectively connected to the opposite sides of the sliding chamber. The electronic ignition unit is installed at the end of the first channel away from the sliding chamber. The other gas storage cover is installed at the end of the second channel away from the sliding chamber. The safety plug unit is installed at the end of the third channel away from the sliding chamber.

[0014] The piston is provided with a T-shaped channel and an L-shaped channel. The T-shaped channel forms a first safety hole, a second safety hole and a third safety hole on the outer surface of the piston. The L-shaped channel forms a first working hole and a second working hole on the outer surface of the piston.

[0015] When the piston slides to the first position, the first channel, the L-shaped channel, and the third channel are connected in sequence; when the piston slides to the second position, the first channel, the T-shaped channel, and the two gas storage hoods are connected in sequence.

[0016] Optionally, the safety plug unit includes a plug frame, a diaphragm, a fixing member, and an annular fluorosilicone rubber gasket. The plug frame is sealed and installed in the ignition channel through which the high-temperature and high-pressure gas passes after ignition. The plug frame has an installation groove near the end where the high-temperature and high-pressure gas enters. The diaphragm is located at the bottom of the installation groove. The fixing member is installed in the installation groove. The diaphragm is clamped between the bottom of the installation groove and the fixing member. Both the plug frame and the fixing member have perforations for the high-temperature and high-pressure gas to pass through. The annular fluorosilicone rubber gasket is sandwiched between the plug frame and the main body.

[0017] Optionally, the fixing component includes a pressure cap and a screw. The pressure cap has an annular structure, and the membrane blocking frame has a cylindrical structure. The pressure cap has multiple through holes for the screw to pass through, and the end of the membrane blocking frame has a threaded hole. The through holes and the threaded holes are arranged in a one-to-one correspondence. The screw passes through the through holes and the membrane in sequence and is then threaded into the threaded hole.

[0018] Optionally, the diaphragm is made of aluminum foil, which is punctured when the gas pressure in the ignition channel exceeds 7 MPa.

[0019] Optionally, the electromagnetic actuation unit is a bidirectional holding electromagnet, and the bidirectional holding electromagnet has a socket interface on its side.

[0020] Optionally, the first channel is Y-shaped, and two openings are provided at the end of the first channel away from the sliding chamber. The electronically controlled ignition unit is provided with two units, which are respectively installed at the two openings of the first channel.

[0021] Optionally, a connecting cylinder is provided on the end face of the piston near the electromagnetic actuation unit.

[0022] Optionally, the two gas storage hoods, the electromagnetic actuation unit, and the main body are all connected by a flange structure.

[0023] Optionally, the flange structure is provided with an O-ring for sealing.

[0024] Optionally, the piston is made of copper alloy, and the two gas storage covers are made of 2Cr13 conforming to GJB2294-95 standard.

[0025] In summary, this application includes at least one of the following beneficial technical effects:

[0026] By activating the electromagnetic actuator and driving the piston to slide, the switching and locking between the safe state and the working state can be achieved. The structure is simple and reasonable, requiring fewer parts. The components have high structural strength and excellent reliability. This application uses a bidirectional holding electromagnet, which only requires pulse power to switch states. At the same time, the bidirectional holding electromagnet has a large holding force, which can resist strong impact and vibration. Moreover, it is smaller in size and lighter in weight.

[0027] A safety plug unit is added to the ignition channel. When the piston is in the safe state, if the electronic ignition unit ignites accidentally, the high-temperature, high-pressure gas will reach the gas reservoir through the piston's internal channel. Because the gas reservoir has a large enough volume, the pressure of the high-temperature, high-pressure gas will not exceed 7MPa. Due to the insufficient pressure, the diaphragm will not be ruptured, so the ignition channel remains closed and normal ignition is impossible. When the piston switches to the working state, the piston's internal channel directly connects to the electronic ignition unit and the safety plug unit. At this time, the high-temperature, high-pressure gas has difficulty reaching the gas reservoir through the gap between the piston and the cavity in a short time. The high-temperature, high-pressure gas is mainly concentrated in the channel, where the pressure will far exceed 7MPa, which can quickly rupture the diaphragm. Therefore, the ignition channel is open, achieving normal ignition. Thus, the safety plug unit can effectively prevent the risk of accidental ignition, making it safer. Attached Figure Description

[0028] To more clearly illustrate the technical solutions in the embodiments of this application, the accompanying drawings used in the description of the embodiments will be briefly introduced below. Obviously, the accompanying drawings described below are only some embodiments of this application. For those skilled in the art, other drawings can be obtained based on these drawings without creative effort.

[0029] Figure 1 This is a schematic diagram of the ignition safety mechanism in the embodiments of this application.

[0030] Figure 2 This is a cross-sectional structural diagram of the ignition safety mechanism in the embodiments of this application.

[0031] Figure 3 This is a schematic diagram of the piston structure in an embodiment of this application.

[0032] Figure 4 This is a cross-sectional structural schematic diagram of the safety plug unit in the embodiment of this application.

[0033] Explanation of reference numerals in the attached figures:

[0034] 1. Body; 11. Sliding chamber; 12. First channel; 13. Second channel; 14. Third channel; 2. Gas storage hood; 3. Electrically controlled ignition unit; 4. Safety plug unit; 41. Diaphragm holder; 42. Diaphragm; 43. Pressure cap; 44. Screw; 5. Piston; 51. T-shaped channel; 511. First safety hole; 512. Second safety hole; 513. Third safety hole; 52. L-shaped channel; 521. First working hole; 522. Second working hole; 53. Connecting cylinder; 6. Electromagnetic actuation unit; 61. Socket interface; 7. Mounting plate; 71. Mounting hole; 8. Flange structure; 81. O-ring. Detailed Implementation

[0035] To make the technical problems, technical solutions, and beneficial effects to be solved by this application clearer, the following detailed description is provided in conjunction with the accompanying drawings and embodiments. It should be understood that the specific embodiments described herein are merely illustrative and are not intended to limit the scope of this application.

[0036] It should be noted that when a component is referred to as being "fixed to" or "set on" another component, it can be directly on or indirectly on that other component. When a component is referred to as being "connected to" another component, it can be directly connected to or indirectly connected to that other component.

[0037] It should be understood that the terms "length", "width", "upper", "lower", "front", "rear", "left", "right", "vertical", "horizontal", "top", "bottom", "inner", "outer", etc., indicate the orientation or positional relationship based on the orientation or positional relationship shown in the accompanying drawings. They are only for the convenience of describing this application and simplifying the description, and do not indicate or imply that the device or element referred to must have a specific orientation, or be constructed and operated in a specific orientation. Therefore, they should not be construed as limitations on this application.

[0038] Furthermore, the terms "first" and "second" are used for descriptive purposes only and should not be construed as indicating or implying relative importance or implicitly specifying the number of technical features indicated. Thus, a feature defined as "first" or "second" may explicitly or implicitly include one or more of that feature. In the description of this application, "multiple" means two or more, unless otherwise explicitly specified.

[0039] The following is in conjunction with the appendix Figure 1-4 This application will be described in further detail.

[0040] This application discloses an ignition safety mechanism. (Refer to...) Figure 1 , Figure 2 and Figure 3The ignition safety mechanism includes the main body 1, two gas storage hoods 2, an electronic ignition unit 3, a safety plug unit 4, a piston 5, and an electromagnetic actuation unit 6;

[0041] The body 1 has a sliding chamber 11 inside. The openings at both ends of the sliding chamber 11 are located on two opposite end faces of the body 1. The piston 5 is slidably assembled in the sliding chamber 11 along the axial direction. A gap is left between the piston 5 and the inner wall of the sliding chamber 11 to achieve a micro-sealed sliding connection between the two. The electromagnetic actuator 6 and one of the gas storage covers 2 are respectively sealed and connected to the two opposite end faces of the body 1. A part of the electromagnetic actuator 6 is connected to the piston 5. The electromagnetic actuator 6 is used to drive the piston 5 to slide back and forth between the first position and the second position.

[0042] To prevent the piston 5 from rotating when sliding, the piston 5 has a guide pin and the sliding chamber 11 has a guide groove. The piston 5 slides in the guide groove through the guide pin.

[0043] The main body 1 is provided with a first channel 12, a second channel 13 and a third channel 14. The first channel 12 and the second channel 13 are respectively connected to the opposite sides of the sliding chamber 11. The electric ignition unit 3 is installed at the end of the first channel 12 away from the sliding chamber 11. Another gas storage cover 2 is installed at the end of the second channel 13 away from the sliding chamber 11. The safety plug unit 4 is installed at the end of the third channel 14 away from the sliding chamber 11.

[0044] The piston 5 is provided with a T-shaped channel 51 and an L-shaped channel 52. The T-shaped channel 51 forms a first safety hole 511, a second safety hole 512 and a third safety hole 513 on the outer surface of the piston 5. The L-shaped channel 52 forms a first working hole 521 and a second working hole 522 on the outer surface of the piston 5.

[0045] When piston 5 slides to the first position, the first channel 12, the L-shaped channel 52 and the third channel 14 are connected in sequence, which is the working state; when piston 5 slides to the second position, the first channel 12, the T-shaped channel 51 and the two gas storage covers 2 are connected in sequence, which is the safe state.

[0046] Since the two gas storage hoods 2 are placed vertically, while ensuring a large gas storage volume, the volume of each gas storage hood 2 can be designed to be smaller, and thus the size of the entire ignition safety mechanism can be made smaller, which has a very obvious advantage in size.

[0047] The electromagnetic actuator 6 is a bidirectional holding electromagnet. The bidirectional holding electromagnet has a socket interface 61 on its side. It does not require prolonged power supply; a short power supply of less than 0.5 seconds is sufficient to complete the state transition, and it retains its state even after power is cut off. Because the electromagnet uses a neodymium iron boron permanent magnet with extremely strong magnetic force, its holding force after power failure is very large, sufficient to withstand strong impacts and vibrations.

[0048] The first channel 12 is Y-shaped, and two openings are provided at the end of the first channel 12 away from the sliding chamber 11. Two electronic ignition units 3 are respectively installed at the two openings of the first channel 12.

[0049] Through the above technical solutions, the structure of piston 5 and body 1 is more compact and the spatial layout is more reasonable. This not only facilitates the early processing and later assembly of parts, but also allows the two electronic ignition units 3 to serve as backups for each other. Whether in a safe state or a working state, they are very stable.

[0050] A connecting cylinder 53 is provided on the end face of the piston 5 near the electromagnetic actuator 6. The design of the connecting cylinder 53 facilitates a firm connection between the piston 5 and the telescopic rod of the electromagnetic actuator 6.

[0051] A mounting plate 7 is provided on the side of the main body 1 away from the electronic ignition unit 3. Multiple mounting holes 71 are provided on both sides of the mounting plate 7. The design of the mounting plate 7 is conducive to the installation and fixation of the entire ignition safety mechanism.

[0052] The two gas storage hoods 2, the electromagnetic actuator 6 and the main body 1 are all connected by a flange structure 8. An O-ring 81 for sealing is provided in the flange structure 8, which can firmly connect the gas storage hood 2, the electromagnetic actuator 6 and the main body 1, and the airtightness is very high.

[0053] The main body 1 is made of titanium alloy, which has very high mechanical strength and is relatively lightweight.

[0054] Piston 5 is made of copper alloy. However, considering the principle of meeting design requirements at the lowest cost, aluminum bronze alloy was chosen as the material for piston 5. Aluminum bronze alloy has advantages such as good machinability, high mechanical properties, fatigue resistance, wear resistance, corrosion resistance, low temperature resistance, and no sparks generated upon impact.

[0055] The gas hood 2 is made of 2Cr13 material that conforms to the GJB2294-95 standard. It has good processing performance, high mechanical properties, and is not easily deformed and leaks easily.

[0056] The ignition safety mechanism in this application embodiment has two states:

[0057] Safe condition: Even if the electronic ignition unit 3 is accidentally ignited, when the piston 5 is in a safe condition, if the electronic ignition unit 3 ignites accidentally, the high-temperature, high-pressure gas will reach the gas reservoir 2 through the internal channel of the piston 5. Because the volume of the gas reservoir 2 is large enough, the pressure of the high-temperature, high-pressure gas will not exceed 7 MPa. Due to the insufficient pressure, it will not detonate the diaphragm 42 (see details). Figure 4 The ignition channel remains closed and cannot ignite normally; however, the high-temperature and high-pressure gas generated by the electronic ignition unit 3 is trapped inside the ignition safety mechanism and cannot reach the ignition powder box (connected to the outer end of the third channel 14), so the powder box will not be ignited, thus ensuring that the solid rocket engine is not accidentally ignited.

[0058] In the working state, the ignition safety mechanism opens the channel between the electronic ignition unit 3 and the powder box. When piston 5 switches to the working state, the channel inside piston 5 directly connects to the electronic ignition unit 3 and reaches the safety plug unit 4. At this time, the high-temperature and high-pressure gas has difficulty reaching the gas storage hood 2 in a short time through piston 5 and the cavity gap. The high-temperature and high-pressure gas is mainly concentrated in the channel. At this time, the pressure in the channel will far exceed 7MPa, which can quickly activate diaphragm 42 (see details). Figure 4 The ignition channel is connected, so normal ignition is achieved. If the electronic ignition unit 3 is detonated, it will directly ignite the gunpowder box, which will then ignite the ignition engine connected to the gunpowder box, and then the main engine will be ignited, and the solid rocket engine will be successfully ignited.

[0059] The ignition safety insurance mechanism has two functions:

[0060] Safety condition: Even if the electronic ignition unit 3 is accidentally detonated, it must be ensured that the solid rocket motor will not be ignited;

[0061] In operation, if the electronic ignition unit 3 is detonated, it must be ensured that ignition is successful.

[0062] Therefore, by activating the electromagnetic actuator 6 and driving the piston 5 to slide, the switching and locking between the safe state and the working state can be achieved. The structure is simple and reasonably designed, requires fewer parts, has high structural strength of components, and has excellent reliability. It can withstand various powerful impacts, is more durable, and operates more stably.

[0063] Please refer to Figure 3 and Figure 4The safety plug unit 4 includes a diaphragm frame 41, a diaphragm 42, a fixing member, and an annular fluorosilicone rubber gasket 45. The diaphragm frame 41 is sealed and installed in the ignition channel through which the high-temperature and high-pressure gas passes after ignition. The end of the diaphragm frame 41 near the entrance of the high-temperature and high-pressure gas is provided with an installation groove. The diaphragm 42 is located at the bottom of the installation groove, and the fixing member is installed in the installation groove. The diaphragm 42 is clamped between the bottom of the installation groove and the fixing member. Both the diaphragm frame 41 and the fixing member are provided with perforations for the high-temperature and high-pressure gas to pass through. The annular fluorosilicone rubber gasket 45 is sandwiched between the diaphragm frame 41 and the main body 1, and the thickness of the annular fluorosilicone rubber gasket 45 is about 1.5 mm. When the safety plug unit 4 is installed, the annular fluorosilicone rubber gasket 45 will be squeezed, thereby increasing the sealing effect.

[0064] The fasteners include a pressure cap 43 and a screw 44. The pressure cap 43 is a ring structure, and the membrane blocking frame 41 is a cylindrical structure. The pressure cap 43 is provided with multiple through holes for the screw 44 to pass through. The end of the membrane blocking frame 41 is provided with a threaded hole. The through holes and the threaded holes are arranged in a one-to-one correspondence. The screw 44 passes through the through holes and the membrane 42 in sequence and is then threaded into the threaded hole.

[0065] The diaphragm 42 is made of aluminum foil. When the gas pressure in the ignition channel is higher than 7 MPa, the aluminum foil is ruptured.

[0066] The safety plug unit 4 is designed to be added to the ignition channel. When the amount of leaked high-temperature and high-pressure gas is small, the pressure it forms is not large enough to break the diaphragm 42. Therefore, the ignition channel remains closed and cannot ignite normally. When there is a lot of high-temperature and high-pressure gas, the pressure it forms is very large and can quickly break the diaphragm 42. Therefore, the ignition channel is connected and normal ignition is achieved. Thus, the safety plug unit 4 can effectively prevent the risk of accidental ignition and is safer.

[0067] Since there is no complete seal between the piston 5 and the sliding chamber 11, but rather a certain gap, this application refers to it as a "micro-seal".

[0068] Even in a safe state, there may be a slight leak of high-temperature and high-pressure gas into the membrane holder 41 and the diaphragm 42 (i.e., the safety plug unit 4). However, since most of the high-temperature and high-pressure gas has already reached the gas storage hood 2, and the volume of the gas storage hood 2 is designed to be about 103ml, the pressure of the high-temperature and high-pressure gas will not exceed 7MPa, so the diaphragm 42 will not be ruptured.

[0069] When in operation, the first channel 12, the third channel 51, and the second channel 13 are connected in sequence (i.e., ignition channels) and aligned with the diaphragm 42. Even if some high-temperature and high-pressure gas leaks through the gap between the piston 5 and the sliding chamber 11 into the gas storage cover, the pressure inside the ignition channel is still much higher than 7MPa. The diaphragm 42 will be easily ruptured, thus igniting the gunpowder box.

[0070] In this application, the electronic ignition unit 3 can be a common electronically controlled explosive bolt, and the electromagnetic actuation unit 6 in this embodiment is a bidirectional holding electromagnet. This electromagnet has a large holding force after being de-energized, and the piston state will not change even if the equipment is subjected to impact vibration. In other embodiments, the electromagnetic actuation unit 6 can also be a common electronically controlled push rod or a similar cylinder or hydraulic cylinder telescopic component.

[0071] Because this application employs "micro-sealing" technology, O-rings are no longer needed for sealing on piston 5 (complete sealing). Simultaneously, the sliding transition of piston 5 is extremely smooth with virtually no resistance. Due to the minimal resistance, this application can utilize a bidirectional holding electromagnet to pull piston 5 for state switching. Compared to common electromagnetic chucks, it does not require prolonged power supply to operate. For space-going equipment like rocket engines, this further conserves power and enhances safety.

[0072] If a "fully sealed" system (i.e., an O-ring is added to piston 5 for sealing) is used instead of "micro-sealing" technology, then it cannot be driven by an electromagnet and can only be driven by a motor. Although the driving force of a motor is greater than that of an electromagnet, its operating speed is very slow and cannot meet the requirements of rapid switching. Moreover, the structure of the motor and the reduction mechanism is complex, the failure rate is high, the low-temperature performance is far inferior to that of an electromagnet, and the cost is also very high.

[0073] The above description is merely a preferred embodiment of this application and is not intended to limit this application. Any modifications, equivalent substitutions, and improvements made within the spirit and principles of this application should be included within the protection scope of this application.

Claims

1. An ignition safety mechanism, characterized in that, It includes the main body (1), two gas storage shrouds (2), an electronic ignition unit (3), a piston (5), an electromagnetic actuation unit (6), and a safety plug unit (4); The body (1) is provided with a sliding chamber (11) inside. The openings at both ends of the sliding chamber (11) are located on two opposite end faces of the body (1). The piston (5) is slidably assembled in the sliding chamber (11) along the axial direction of the sliding chamber (11). A gap is left between the piston (5) and the inner wall of the sliding chamber (11) to achieve a micro-sealed sliding connection between the two. The electromagnetic actuator (6) and one of the gas storage covers (2) are respectively sealed and connected to the two opposite end faces of the body (1). A part of the electromagnetic actuator (6) is connected to the piston (5). The electromagnetic actuator (6) is used to drive the piston (5) to slide back and forth between the first position and the second position. The main body (1) is provided with a first channel (12), a second channel (13) and a third channel (14). The first channel (12) and the second channel (13) are respectively connected to the opposite sides of the sliding chamber (11). The electronic ignition unit (3) is installed at the end of the first channel (12) away from the sliding chamber (11). The other gas storage cover (2) is installed at the end of the second channel (13) away from the sliding chamber (11). The safety plug unit (4) is installed at the end of the third channel (14) away from the sliding chamber (11). The piston (5) is provided with a T-shaped channel (51) and an L-shaped channel (52). The T-shaped channel (51) forms a first safety hole (511), a second safety hole (512) and a third safety hole (513) on the outer surface of the piston (5). The L-shaped channel (52) forms a first working hole (521) and a second working hole (522) on the outer surface of the piston (5). When the piston (5) slides to the first position, the first channel (12), the L-shaped channel (52) and the third channel (14) are connected in sequence; when the piston (5) slides to the second position, the first channel (12), the T-shaped channel (51) and the two gas storage hoods (2) are connected in sequence.

2. The ignition safety mechanism according to claim 1, characterized in that, The safety plug unit (4) includes a plug frame (41), a diaphragm (42), a fixing member, and an annular fluorosilicone rubber gasket (45). The plug frame (41) is sealed and installed in the ignition channel through which the high-temperature and high-pressure gas passes after ignition. The plug frame (41) has an installation groove near the end where the high-temperature and high-pressure gas enters. The diaphragm (42) is located at the bottom of the installation groove. The fixing member is installed in the installation groove. The diaphragm (42) is clamped between the bottom of the installation groove and the fixing member. The plug frame (41) and the fixing member are both provided with perforations for the high-temperature and high-pressure gas to pass through. The annular fluorosilicone rubber gasket (45) is clamped between the plug frame (41) and the body (1).

3. The ignition safety mechanism according to claim 2, characterized in that, The fastener includes a pressure cap (43) and a screw (44). The pressure cap (43) is an annular structure, and the membrane blocking frame (41) is a cylindrical structure. The pressure cap (43) is provided with multiple through holes for the screw (44) to pass through. The end of the membrane blocking frame (41) is provided with a threaded hole. The through holes and the threaded holes are arranged in a one-to-one correspondence. The screw (44) passes through the through holes and the membrane (42) in sequence and is then threaded into the threaded hole.

4. The ignition safety mechanism according to claim 3, characterized in that, The diaphragm (42) is an aluminum foil, which is punctured when the gas pressure in the ignition channel is higher than 7 MPa.

5. The ignition safety mechanism according to claim 1, characterized in that, The electromagnetic action execution unit (6) is a bidirectional holding electromagnet, and a socket interface (61) is provided on the side of the bidirectional holding electromagnet.

6. The ignition safety mechanism according to claim 1, characterized in that, The first channel (12) is Y-shaped, and two openings are provided at one end of the first channel (12) away from the sliding chamber (11). The electronic ignition unit (3) is provided with two openings respectively installed at the two openings of the first channel (12).

7. The ignition safety mechanism according to claim 1, characterized in that, A connecting cylinder (53) is provided on the end face of the piston (5) near the electromagnetic action execution unit (6).

8. The ignition safety mechanism according to claim 1, characterized in that, The two gas storage hoods, the electromagnetic actuation unit (6), and the main body (1) are all connected by a flange structure (8).

9. The ignition safety mechanism according to claim 8, characterized in that, The flange structure (8) is provided with an O-ring (81) for sealing.

10. The ignition safety mechanism according to any one of claims 1 to 9, characterized in that, The piston (5) is made of copper alloy, and the two gas storage covers (2) are made of 2Cr13 conforming to GJB2294-95 standard.

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