High-safety ignition device with three-level interlocking protection

Abstract

The invention discloses a high-safety ignition device with three-level interlocking protection, and belongs to the technical field, the high-safety ignition device comprises a shell, a transverse inner cavity and a longitudinal inner cavity which are communicated in a crossed manner are arranged in the shell, a pin is arranged in the longitudinal inner cavity, the upper end of the pin is fixed by a spring and a blanking cap in sequence, and the lower end of the pin is fixed by a bolt. A clamping groove and a pin hole are formed in the middle section of the pin, and a sealing ring A is mounted on the pin; a piston is arranged in the transverse inner cavity, the piston is fixed by a disc spring and a lock pin, the lock pin is provided with an inclined surface, the inclined surface is inserted into a clamping groove of a pin, and two electric igniters are further included; by means of three-level interlocking protection, ignition operation of the firer system caused by accidental action of the electric igniter can be effectively prevented, and therefore the safety of the firer system in the storage, transportation and using process is effectively improved.

Description

Technical Field

[0001] This invention relates to the field of pyrotechnic safety technology, and in particular to a highly safe ignition device with three-level interlocking protection. Background Technology

[0002] Ignition devices are generally used for primary ignition in aerospace launch systems and weapon activation systems. Ignition devices without security mechanisms may be activated due to various unexpected factors, causing significant losses. The security mechanisms of conventional ignition devices are usually controlled by an electronic control system to activate mechanical locks (such as pushers, pin pullers, and solenoid valves). The structure is relatively complex. Mechanical pushers, pin pullers, and solenoid valves have electromagnetic on / off systems or microelectromechanical systems. Although they are modular components, they are indeed more complex and delicate than individual pressure systems, and are more susceptible to extreme electromagnetic or mechanical environments. Moreover, the electronic control requires programming. If the electronic control system is interfered with or the control program is disordered, it may cause the ignition device to fail to start the next stage device due to lack of energy input, or it may fail to start the next stage device under normal ignition. Summary of the Invention

[0003] The purpose of this invention is to provide a highly safe ignition device with three-level interlocking protection to solve the above-mentioned problems.

[0004] To achieve the above objectives, the technical solution adopted by the present invention is as follows: A high-safety ignition device with three-level interlocking protection is characterized by comprising a housing, wherein the housing is provided with a transverse inner cavity and a longitudinal inner cavity that are arranged in a cross-shaped communication. A pin is provided in the longitudinal inner cavity. The upper end of the pin is fixed by a spring and a plug in sequence. The middle section of the pin is provided with a groove and a pin hole. A sealing ring A is installed on the pin. A piston is provided in the transverse inner cavity. The piston is fixed by a disc spring and a locking pin. The locking pin has an inclined surface, which is inserted into the slot of the pin. Electric igniter B and electric igniter A are respectively provided at one end of the transverse inner cavity and the longitudinal inner cavity. Electric igniter B and electric igniter A are respectively connected to an external power source. An on / off circuit is provided between electric igniter B and the external power source and is built into the housing. It also includes a pressure accumulator chamber, as well as sealing ring A, sealing ring B and pressure-resistant diaphragm for sealing the pressure accumulator chamber; The internal pressure accumulator is connected to the transverse internal cavity through channel C; and to the longitudinal internal cavity through channel A; the longitudinal internal cavity is connected to the outside through the exhaust port; and the pressure accumulator is connected to the outside through the ignition port.

[0005] The working principle of this invention is as follows: the first and second level protection mechanisms are unlocked by interlocking two electric igniters, and high-temperature and high-pressure gas is supplied to the accumulator in stages. When the pressure in the accumulator finally exceeds the critical point, the third level protection is unlocked, and the lower-level pyrotechnic device is ignited or detonated or the lower-level mechanical device is powered.

[0006] Compared with the prior art, the advantages of the present invention are as follows: The ignition device of the present invention has three-level interlock protection. After receiving input energy, the three-level interlock protection will automatically unlock in sequence before the next level device can be started. This can effectively prevent the ignition of the pyrotechnic system from being caused by accidental operation of the electric igniter, thereby ensuring the safety of the ignition device during storage, transportation and use. At the same time, the present invention does not require the use of the electrical control system of conventional security agencies, reducing unstable factors. Attached Figure Description

[0007] Figure 1 This is a schematic diagram of the structure of the ignition device security mechanism of the present invention when it is in the locked state; Figure 2 This is a schematic diagram of the structure of the ignition device security mechanism of the present invention in the unlocked state; In the diagram, 1. Housing; 2. Plug; 3. Spring; 4. Pin; 5. Slot; 6. Vent; 7. Pin Hole; 8. Locking Pin; 9. Sealing Ring A; 10. Electric Ignition Device A; 11. Channel A; 12. Accumulator Chamber; 13. Pressure-Resistant Diaphragm; 14. Channel B; 15. Channel C; 16. Sealing Ring B; 17. Piston; 18. Disc Spring; 19. Electric Ignition Device B; 20. Metal Spring; 21. Polar Needle; 22. Power Supply A; 23. Power Supply B. Detailed Implementation

[0008] To explain the technical content, objectives, and effects of the present invention in detail, the following specific embodiments are provided to further illustrate the content of the present invention. However, the content of the present invention is far more than the following examples.

[0009] Example 1 A high-safety ignition device with three-level interlock protection, see [link / reference]. Figure 1 The system includes a housing 1, which has a transverse inner cavity and a longitudinal inner cavity that are connected in a cross shape. In this embodiment, both the transverse inner cavity and the longitudinal inner cavity are cylindrical. A pin 4 is provided in the longitudinal inner cavity. The upper end of the pin 4 is fixed by a spring 3 and a plug 2 in sequence. The middle section of the pin 4 is provided with a groove 5 and a pin hole 7. A sealing ring A 9 is installed on the pin 4. A piston 17 is provided in the transverse inner cavity. The piston 17 is fixed by a disc spring 18 and a locking pin 8. The locking pin 8 has an inclined surface, which is inserted into the slot 5 of the pin 4. An electric igniter B 19 and an electric igniter A 10 are respectively provided at one end of the transverse inner cavity and the longitudinal inner cavity. The electric igniter B 19 and the electric igniter A 10 are respectively connected to external power supplies B 23 and A 22. Power supplies B 23 and A 22 are respectively connected to the electric igniter B 19 and the electric igniter A 10 by plugging in. A switching circuit is provided between the electric igniter B 23 and the external power supply A 22 and is built into the housing 1. In this embodiment, the switching circuit includes a metal spring 20 and a pole needle 21 provided in the housing 1. It also includes a pressure accumulator 12, and a sealing ring A 9, a sealing ring B 16 and a pressure-resistant diaphragm 13 for sealing the pressure accumulator; The pressure accumulator 12 inside the housing is connected to the transverse inner cavity through channel C 15; it is connected to the longitudinal inner cavity through channel A 11; the longitudinal inner cavity is connected to the outside through the exhaust port 6; and the pressure accumulator 12 is connected to the outside through the ignition port 13.

[0010] The ignition device of the present invention comprises a primary protection mechanism consisting of an electric igniter A 10, a housing 1, a pin 4, a sealing ring A 9, a spring 3, a plug 2, a metal spring 20, and a pole needle 21; a secondary protection mechanism consisting of an electric igniter B 19, a housing 1, a piston 17, a locking pin 8, a sealing ring B 16, and a disc spring 18; and a tertiary protection mechanism consisting of a housing 1, a pressure-resistant diaphragm 13, a sealing ring A 9, and a sealing ring B 16. The preferred technical solution is that both the transverse and longitudinal inner cavities are cylindrical.

[0011] Normal working process: The ignition device is powered by power supply B23, and the energy input circuit of the electric igniter B19 is disconnected and does not work. Figure 1 As shown; the electric igniter A 10 receives energy input and generates high-temperature and high-pressure gas to push the pin 4, compress the spring 3, push the inclined surface of the locking pin 8 to slide out of the slot 5, and push the piston 17 to compress the disc spring 18. After the pin 4 moves into place, it opens the channel A 11 to complete the first-stage release. The high-temperature and high-pressure gas enters the accumulator chamber 12 from the channel A 11 and generates pressure A. After pin 4 moves into position, the metal spring 20 on pin 4 connects with the electrode 21, and the energy input circuit of electric igniter B 19 is completed. Figure 2 As shown, after action, the high temperature and high pressure gas generated pushes the piston 17 into the middle section of the pin 4 and opens the channel C 15. The pin 4 is interlocked with the piston 17 by the rebound pressure of the compression spring 3, completing the second-stage release. The high temperature and high pressure gas enters the accumulator chamber 12 from the channel C 15, generating pressure B. The combined pressure of pressure A and pressure B causes the pressure inside the accumulator 12 to exceed the critical pressure point of the pressure-resistant diaphragm 13, causing the pressure-resistant diaphragm 13 to break, completing the three-stage release. The high-temperature and high-pressure gas in the accumulator 12 enters the next stage device through the ignition port 13, and the next stage device starts normally.

[0012] The first type of abnormal working process: When the electric igniter A 10 has no energy input, it unexpectedly generates high-temperature and high-pressure gas, which pushes the pin 4, compresses the spring 3, pushes the inclined surface of the locking pin 8 to slide out of the slot 5, and pushes the piston 17 to compress the disc spring 18. After the pin 4 moves into place, it opens the channel A11, completing the first-stage release. The high-temperature and high-pressure gas enters the accumulator chamber 12 from the channel A 11, generating pressure A. After pin 4 moves into position, the metal spring 20 on pin 4 engages with electrode 21, and the energy input circuit of electric igniter B 19 is completed. Because there is no energy input in the energy input circuit of electric igniter B 19, electric igniter B 19 does not function, and piston 17 is only reset by the return spring 18 and will not insert into pin 4. After the high-temperature, high-pressure gas generated by electric igniter A 10 enters the accumulator chamber 12 through channel A 11, the thrust on pin 4 decreases, and pin 4 is reset by the return force of spring 3, blocking and fixing piston 17. Channel C 15 cannot be opened, and the secondary release cannot be completed. The pressure A in the accumulator chamber 12 does not reach the critical pressure point of the pressure-resistant diaphragm 13, and the tertiary release cannot be completed. Therefore, the high-temperature, high-pressure gas generated by the unexpected action of electric igniter A 10 cannot be output, and the downstream device will not start.

[0013] The second type of abnormal working process: When electric igniter B 19 fails to input energy, it generates high-temperature, high-pressure gas that acts on piston 17. Because electric igniter A 10 also fails to input energy, the first-stage safety release is not initiated, and passage C 15 cannot open. Simultaneously, piston 17 is locked by the high-temperature, high-pressure gas pressure, preventing pin 4 from moving even with the subsequent unexpected activation of electric igniter A 10. Therefore, high-temperature, high-pressure gas cannot enter the accumulator chamber 12, resulting in no pressure. The third-stage safety release cannot be completed, and the next stage device will not start.

[0014] The third type of abnormal working process: When electric igniters A 10 and B 19 simultaneously and unexpectedly generate high-temperature, high-pressure gas, pin 4 and piston 17 are simultaneously subjected to force, and the thrust is nearly equal. However, because the pressure on disc spring 18 is much higher than that on spring 3, piston 17 locks pin 4 via locking pin 8. Neither channel C 15 nor channel A 11 can be opened, and the high-temperature, high-pressure gas cannot enter the pressure accumulator 12, resulting in no pressure. At this point, all three levels of protection mechanisms are locked, and the next-stage device will not activate.

[0015] The above description is merely a preferred embodiment of the present invention and is not intended to limit the invention. Various modifications and variations can be made to the present invention by those skilled in the art. Any modifications, equivalent substitutions, improvements, etc., made within the spirit and principles of the present invention should be included within the scope of protection of the present invention.

Claims

1. A high-safety ignition device with three-level interlocking protection, characterized in that, The system includes a housing, within which are arranged transverse and longitudinal cavities that communicate in a cross shape. A pin is provided in the longitudinal inner cavity. The upper end of the pin is fixed by a spring and a plug in sequence. The middle section of the pin is provided with a groove and a pin hole. A sealing ring A is installed on the pin. A piston is provided in the transverse inner cavity. The piston is fixed by a disc spring and a locking pin. The locking pin has an inclined surface, which is inserted into the slot of the pin. Electric igniter B and electric igniter A are respectively provided at one end of the transverse inner cavity and the longitudinal inner cavity. Electric igniter B and electric igniter A are respectively connected to an external power source. An on / off circuit is provided between electric igniter B and the external power source and is built into the housing. It also includes a pressure accumulator chamber, as well as sealing ring A, sealing ring B and pressure-resistant diaphragm for sealing the pressure accumulator chamber; The internal pressure accumulator is connected to the transverse internal cavity through channel C; and to the longitudinal internal cavity through channel A; the longitudinal internal cavity is connected to the outside through the exhaust port; and the pressure accumulator is connected to the outside through the ignition port.

2. The high-safety ignition device with three-level interlocking protection according to claim 1, characterized in that, Both the transverse and longitudinal inner cavities are cylindrical.

3. The high-safety ignition device with three-level interlocking protection according to claim 1, characterized in that, The on / off circuit includes a metal spring and a pole needle disposed within the housing.

4. The high-safety ignition device with three-level interlocking protection according to claim 1, characterized in that, The thrust generated on the pin by the electric igniter A is similar to the thrust generated on the piston by the electric igniter B.

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