A state switch structure of a safety device

Abstract

The present invention relates to a state switch structure of a safety device, comprising an electrical connector, a working state switch, a fixed plate, a connecting seat stopper, a safety state switch, and a torque motor. The safety state switch is composed of a moving reed, a static reed, and an insulating seat, and the moving reed, the static reed, and the insulating seat are integrally molded; the structure of the working state switch is completely symmetrical with the structure of the safety state switch; the working state switch and the safety state switch are respectively fixed on the fixed plate, and the moving reeds and the static reeds of the two switches are respectively connected to the electrical connector through cables; the torque motor is connected and fixed on the fixed plate, and the connecting seat stopper is fixedly connected to the torque motor shaft, and the torque motor can drive the connecting seat stopper to rotate. The present invention realizes the two state conversion functions of the safety device "safety" and "working" and the state detection function, and realizes the state switch has a simple structure, a small installation space, good environmental adaptability, and high reliability, thereby ensuring the safety of the solid rocket engine.

Description

Technical Field

[0001] The invention relates to a safety device, in particular to a state switch structure of a solid rocket engine safety device. Background Art

[0002] Solid rocket engines are an important part of the power system of spacecraft and missile weapons. In order to ensure safety during storage, transportation, testing and use, a safety device must be used between the detonator and the ignition device. When the safety device is in the "working" state, the structure allows the detonation wave energy of the detonator to pass through and reliably detonate the next-level pyrotechnics when the detonator is detonated; when it is in the "safe" state, when the detonator ignites accidentally, the structure can block the detonation wave energy and gas of the detonator from passing through, preventing the next-level pyrotechnics from being detonated, thereby ensuring the safety of solid rocket engines.

[0003] The existing safety devices have complex structures and large volumes. Their state switches have complex structures, poor environmental adaptability, and low reliability. The existing solid rocket engine safety devices are mainly electromagnetic and torque motor types. They have complex structures, large volumes and weights. Their internal state switches have complex structures and low reliability. With the continuous development of missile weapons, higher design requirements are put forward for the reliability, volume, and structural weight of safety devices. Summary of the invention

[0004] The technical problem to be solved by the present invention is to provide a state switch structure of a safety device, so as to solve the problem of providing a state switch with simple structure, good environmental adaptability and high reliability for the safety device.

[0005] In order to solve the existing technical problems, the technical solution adopted by the present invention is: a state switch structure of a safety device, including an electrical connector, a working state switch, a fixing plate, a connecting seat stop rod, a safety state switch, and a torque motor.

[0006] The safety status switch is composed of a moving reed, a static reed and an insulating seat, and the moving reed, the static reed and the insulating seat are integrally molded; the structure of the working status switch is completely symmetrical with that of the safety status switch; the working status switch and the safety status switch are respectively fixed on a fixed plate, and the moving reeds and static reeds of the two switches are respectively connected to the electrical connector through cables.

[0007] The torque motor is connected and fixed on the fixed plate, the connecting seat blocking rod is fixedly connected to the torque motor shaft, and the torque motor can drive the connecting seat blocking rod to rotate.

[0008] When the safety device is in the safety state, the seat stop rod is connected to squeeze the moving reed and the static reed of the safety state switch, so that the safety state switch is closed and the working state switch is disconnected; the torque motor is energized through the electrical connector, the safety device performs state conversion, the torque motor drives the seat stop rod to rotate counterclockwise, and after the seat stop rod is rotated into place, it squeezes the moving reed and the static reed of the working state switch to close, so that the working state switch is closed, the safety state switch is disconnected, and the safety device is in the working state.

[0009] Generally, the static spring piece and the dynamic spring piece can be made of materials such as beryllium bronze, and the insulating seat can be made of epoxy glass cloth. In particular, in order to ensure the switch performance, the static spring piece of the present invention preferably has a deformation amount of not less than 0.5mm under pressure and a maximum deformation amount of not more than 3mm.

[0010] Beneficial Effects

[0011] The present invention provides a state switch structure of a solid rocket engine safety device, which realizes the two state conversion functions of the safety device, namely "safety" and "working", and the state detection function, and realizes the state switch structure is simple, the installation space is small, the environmental adaptability is good, and the reliability is high. The state switch is used in the solid rocket engine safety ignition device, and the safety of the solid rocket engine is ensured. BRIEF DESCRIPTION OF THE DRAWINGS

[0012] Figure 1 This is a schematic diagram of the safety device status switch (fuse status);

[0013] Figure 2 This is a schematic diagram of the insurance status switch;

[0014] Figure 3 It is a schematic diagram of the working status switch;

[0015] Figure 4 It is a schematic diagram of the moving reed;

[0016] Figure 5 This is the circuit diagram of the safety device (insurance status);

[0017] In the figure: 1-electric connector, 2-cable, 3-working status switch, 4-fixing plate, 5-connecting seat stop rod, 6-safety status switch, 7-torque motor, 8-moving reed, 9-static reed, 10-insulating seat. DETAILED DESCRIPTION

[0018] The present invention will be further described below in conjunction with the accompanying drawings and embodiments.

[0019] A specific embodiment is a state switch structure of a safety device, which is composed of an electrical connector 1, a cable 2, a working state switch 3, a fixing plate 4, a connecting seat stopper 5, a safety state switch 6, and a torque motor 7. The schematic diagram of the state switch is shown in FIG. Figure 1 Its main technical indicators are:

[0020] Insurance (working) status switch dimensions: 10×15×20mm;

[0021] When the switch is under pressure, the deformation of the spring is not less than 0.5mm, and the limit deformation is not more than 3mm;

[0022] The assembly clearance between the moving spring and the static spring in the free state of the insurance (working) state switch is (1.1±0.1)mm;

[0023] The number of switch action conversions in the insurance (working) state: not less than 600 times;

[0024] Design thickness of switch moving spring and static spring: 0.2mm;

[0025] The thickness of the gold plating layer of the switch moving reed and static reed: 3~5μm;

[0026] Working temperature: -50~+75℃.

[0027] like Figure 2 As shown, the insurance state switch 6 is composed of a moving spring 8, a static spring 9 and an insulating seat 10, and the working state switch 3 (such as Figure 3 The structure is completely symmetrical with the insurance state switch 6. Figure 4 As shown), the static reed is designed to have a thickness of 0.2mm and is made of beryllium bronze. The reed is subjected to solution treatment and then aging treatment. The insulating seat is made of epoxy glass cloth. The dynamic reed, static reed and insulating seat are integrally molded. After molding, the surface of the reed is gold-plated, and the thickness of the gold-plated layer is (3~5)μm.

[0028] The working state switch 3 and the insurance state switch 6 are fixed to the fixing plate 4 by screws, and the moving springs and the static springs of the two switches are respectively connected to the cable 2. The torque motor 7 is connected to the fixing plate 4 by screws, and the torque motor shaft is fixedly connected to the connecting seat stop rod 5, and the torque motor 7 can drive the connecting seat stop rod 5 to rotate.

[0029] After the product is assembled, when in the safety state (or working state), the connecting seat stop rod 5 squeezes the switch reed, and the deformation of the static reed of the working state switch and the safety state switch under pressure is not less than 0.5mm, and the limit deformation is not more than 3mm, thereby ensuring the reliability of the switch action.

[0030] Safety device circuit diagram Figure 5As shown, when the safety device is in the initial state (safety state), 3 (4) and 5 (6) are disconnected, and 3 (4) and 9 are connected, that is, the connecting seat stopper lever squeezes the reed of the safety state switch, the safety state switch is closed, and the working state switch is disconnected. Power is supplied to both ends of the torque motor through the electrical connector port (positive power is supplied to point 1 (2), and negative power is supplied to point 7 (8)), and the safety device performs state conversion. The torque motor drives the connecting seat stopper lever to rotate 270° counterclockwise. After the connecting seat stopper lever rotates to the right position, it squeezes the reed of the working state switch, and 3 (4) and 5 (6) are connected, and 3 (4) and 9 are disconnected, that is, the working state switch is closed, the safety state switch is disconnected, and the product is in working state.

[0031] When the safety device is in working state, 3 (4) and 5 (6) are connected, and 3 (4) and 9 are disconnected, that is, the connecting seat stopper lever squeezes the reed of the working state switch, the working state switch is closed, and the safety state switch is disconnected. Power is supplied to both ends of the torque motor through the electrical connector (positive power is supplied to 11 (12) points, and negative power is supplied to 13 (14) points), and the safety device performs state conversion. The torque motor drives the connecting seat stopper lever to rotate 270° clockwise. After the connecting seat stopper lever rotates to the right position, it squeezes the reed of the safety state switch, and 3 (4) and 5 (6) points are disconnected, and 3 (4) and 9 points are connected, that is, the working state switch is closed, the safety state switch is disconnected, and the product is in the safety state.

[0032] The state conversion function is completed by alternately supplying positive and negative electricity to both ends of the torque motor through the electrical connector port. After the state conversion is in place, the on and off conditions of the two state switches can be detected through the electrical connector port to determine the state of the product. When the safety device is in the insurance state, it can determine that the product is in the explosion-proof state; when it is in the working state, it can determine that the product is in the explosion-transmitting state.

[0033] The safety device uses two status switches to ensure the status of the safety device. The status switch is testable and can be tested through the electrical connector port and can complete 600 state transitions.

[0034] The safety device status switch structure has passed the natural environment test, mechanical environment test, electromagnetic compatibility test, reliability growth test, engine ground ignition test, and missile flight test during the development period, and all meet the requirements for use.

Claims

1. A state switch structure of a safety device, comprising an electrical connector (1), a cable (2), a working state switch (3), a fixing plate (4), a connecting seat stopper rod (5), a safety state switch (6), and a torque motor (7), characterized in that: The safety state switch (6) is composed of a moving reed (8), a stationary reed (9) and an insulating seat (10), and the moving reed (8), the stationary reed (9) and the insulating seat (10) are integrally molded; the structure of the working state switch (3) is completely symmetrical with that of the safety state switch (6); the working state switch (3) and the safety state switch (6) are respectively fixed on a fixing plate (4), and the moving reeds (8) and the stationary reeds (9) of the two switches are respectively connected to the electrical connector (1) via a cable (2); The torque motor (7) is connected and fixed on the fixed plate (4), and the connecting seat blocking rod (5) is fixedly connected to the torque motor shaft, and the torque motor (7) can drive the connecting seat blocking rod (5) to rotate; When the safety device is in the safety state, the seat stopper rod (5) is connected to squeeze the movable reed (8) and the static reed (9) of the safety state switch (6) to close, so that the safety state switch (6) is closed and the working state switch (3) is disconnected; the torque motor (7) is energized through the electrical connector (1), the safety device performs state conversion, the torque motor (7) drives the seat stopper rod (5) to rotate counterclockwise, and after the seat stopper rod (5) rotates to the right position, it squeezes the movable reed (8) and the static reed (9) of the working state switch to close, so that the working state switch (3) is closed, the safety state switch (6) is disconnected, and the safety device is in the working state; The moving reed and the stationary reed are made of beryllium bronze.

2. The state switch structure according to claim 1, characterized in that: The static spring sheet (9) has a deformation amount of not less than 0.5 mm under pressure, and a limit deformation amount of not more than 3 mm.

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