An electric ignition device without pyrotechnic agent

Abstract

The invention discloses an electric ignition device without pyrotechnic agent, comprising a shell, wherein the shell comprises a top cover, a cylinder and a nozzle which are fixedly connected in sequence, the top cover is provided with a through hole, a glass frit is installed in the through hole, and a first electrode and a second electrode are axially plugged and arranged inside the shell; in the invention, electrodes and electrically controlled solid propellants are directly used to replace the pyrotechnic agent ignition system in the existing ignition device, because the electrically controlled solid propellant is insensitive to the stimulation of dangerous sources such as open flames and high temperatures, the probability of being accidentally ignited is extremely small, the risk is controllable, and the safety risk of the existing ignition device on sea-based, road-based and space-based weapon platforms with high mechanical impact and high electromagnetic radiation can be completely eliminated, the safety is higher than that of the existing ignition device, the safety and dangerous factors caused by pyrotechnic agent are avoided, and the technical problem of low safety of the ignition device in the prior art is solved.

Description

Technical Field

[0001] The present invention relates to the technical field of solid rocket engines and relates to an electric ignition device, in particular to an electric ignition device without pyrotechnic agent. Background Art

[0002] The ignition device is an important component of the solid rocket motor (SRM) and also a key component of the SRM. It serves as the starting device for the solid rocket motor. The current ignition device is mainly composed of the ignition system (mainly the ignition tube), the energy release system (mainly the ignition powder) and the connecting parts. Among them, the ignition powder can produce a large amount of hot combustion gas in a very short time, surround and heat the surface of the engine main charge, thereby igniting the SRM main charge; the ignition tube generates an initial thermal impulse to ignite the ignition powder of the energy release system; the connecting parts are used to ensure the reliable operation of these two main systems.

[0003] The type of ignition device varies according to the size, type and charge shape of the SRM. Small SRMs widely use pyrotechnic igniters, medium-sized SRMs generally use basket igniters, and large SRMs usually use ignition engines. Both basket igniters and ignition engines use pyrotechnics to ignite. Therefore, current ignition devices all contain pyrotechnic igniters.

[0004] Pyrotechnic agents have high mechanical, electrostatic and radio frequency sensitivities and are the most sensitive and dangerous part of SRM. Static electricity from the human body and some plastic products, strong magnetic fields caused by electromagnetic radiation from radars, radio stations and high-voltage lines, and stray currents on the battlefield and in weapon systems can all cause accidental ignition of pyrotechnic agents, resulting in serious consequences. Therefore, in order to ensure safety and reliability, safety insurance measures need to be taken, such as shielding measures to prevent electrostatic induction and radio frequency electromagnetic induction, installing low-pass filters on the ignition circuit to prevent radio frequency electromagnetic induction, and using mechanical insurance mechanisms to isolate the ignition system and energy release system. These measures, on the one hand, do not fundamentally solve the safety problem of the ignition device, and on the other hand, increase the complexity of the SRM and reduce the reliability of the weapon system. In addition, for small and medium-sized engines widely used in tactical missiles, the above measures are difficult to implement, and it is precisely because the various excitation sources faced by tactical missiles are more complex and more intense that the use of pyrotechnic agents has buried major safety hazards in the use of missile weapons. Summary of the invention

[0005] In view of the shortcomings of the prior art, the purpose of the present invention is to provide an electric ignition device without pyrotechnic agent to solve the technical problem that the ignition device in the prior art is not safe.

[0006] In order to solve the above technical problems, the present invention adopts the following technical solutions to achieve the above problems:

[0007] An electric ignition device without pyrotechnic agent comprises a shell, wherein the shell comprises a top cover, a barrel and a nozzle which are fixedly connected in sequence, a through hole is opened on the top cover, a glass frit is installed in the through hole, and a first electrode and a second electrode are inserted and arranged in the axial direction inside the shell;

[0008] The first electrode comprises a first electrode disk, a first terminal arranged on the axial front end surface of the first electrode disk, and a plurality of first electrode strips uniformly arranged around the edge of the axial rear end surface of the first electrode disk, the plurality of first electrode strips forming a first electrode column, and a second through hole is opened on the first electrode disk;

[0009] The second electrode comprises a second electrode disk, a second terminal arranged on the axial front end surface of the second electrode disk, and a plurality of second electrode strips uniformly arranged around the edge of the second electrode disk, the plurality of second electrode strips forming a second electrode column, the second electrode disk is located inside the first electrode column, the second terminal passes through a second through hole on the first electrode disk, the first electrode column and the second electrode column are coaxial and have the same outer diameter; the first electrode strips and the second electrode strips are alternately arranged and spaced apart;

[0010] An insulating layer is provided between the top cover and the first electrode disk, an insulating partition is provided between the first electrode disk and the second electrode disk, the first terminal sequentially passes through the insulating layer and the glass sinter; the second terminal sequentially passes through the insulating partition, the insulating layer and the glass sinter;

[0011] The first electrode column and the second electrode column are both insulated from the shell, and the interiors of the first electrode column and the second electrode column and the cavity between the first electrode column and the cylinder are filled with electrically controlled solid propellant pellets.

[0012] The present invention also includes the following technical features:

[0013] The insulating partition includes an outer insulating disk, a cylindrical hole is opened in the middle of the outer insulating disk, an inner insulating disk is fixedly installed in the cylindrical hole, grooves for the first electrode disk and the second electrode disk are reserved at the axial front end and the axial rear end of the inner insulating disk, and electrode strip passing holes are evenly opened along the circumferential direction at the edge of the inner insulating disk; an insulating column is arranged on the axial front end surface of the inner insulating disk.

[0014] The glass sinter is provided with two first through holes, the insulating layer is provided with two third through holes; and the insulating column is provided with a fourth through hole penetrating the inner insulating disk.

[0015] The first terminal sequentially passes through the third through hole and the first through hole; the second terminal sequentially passes through the fourth through hole, the third through hole and the first through hole.

[0016] A plurality of fifth through holes are arranged on the nozzle curved surface.

[0017] A sealing layer is arranged between the insulating partition and the first electrode disk and the second electrode disk, a sealing layer is arranged between the insulating layer and the top cover, and a sealing layer is arranged at the contact points between the insulating layer, the insulating partition and the shell.

[0018] A medicine baffle is arranged on the axial rear end surface of the electrically controlled solid propellant grain column, and the axial rear end surface of the medicine baffle is clamped on the axial front end surface of the nozzle.

[0019] The medicine blocking plate comprises a medicine blocking disc and medicine blocking strips evenly distributed along the circumference of the medicine blocking disc.

[0020] Compared with the prior art, the present invention has the following beneficial technical effects:

[0021] The present invention directly adopts electrodes and electrically controlled solid propellants to replace the pyrotechnic ignition system in the current ignition device. Since the electrically controlled solid propellant is insensitive to stimulation from dangerous sources such as open flames and high temperatures, the probability of accidental ignition is extremely small and the risk is controllable. It can completely eliminate the safety risks of the current ignition device on sea-based, road-based and space-based weapon platforms with high mechanical impact and high electromagnetic radiation. It has higher safety than the current ignition device, avoids the safety and risk factors caused by pyrotechnics, and solves the technical problem of low safety of the ignition device in the prior art. BRIEF DESCRIPTION OF THE DRAWINGS

[0022] Figure 1 It is an overall cross-sectional view of the present invention;

[0023] Figure 2 is a schematic diagram of the specific structure of the first electrode in the present invention;

[0024] Figure 3 is a schematic diagram of the specific structure of the second electrode in the present invention;

[0025] Figure 4 is a schematic diagram of the specific structure of the insulating partition in the present invention;

[0026] Figure 5 is a schematic diagram of the specific structure of the insulating layer in the present invention;

[0027] Figure 6 It is a schematic diagram of the specific structure of glass sintering in the present invention;

[0028] Figure 7 It is a schematic diagram of the external structure of the present invention;

[0029] Figure 8 Schematic diagram of the overall structure of the medicine baffle.

[0030] The meanings of the numbers in the figure are: 1-shell, 2-first through hole, 3-first electrode, 4-second electrode, 5-insulating layer, 6-third through hole, 7-insulating partition, 8-fourth through hole, 9-electrically controlled solid propellant grain, 10-fifth through hole, 11-drug blocking plate, 12-through hole, 13-glass sintering;

[0031] 101-top cover, 102-barrel, 103-nozzle;

[0032] 301 - first electrode disk, 302 - first terminal, 303 - first electrode strip, 304 - second through hole;

[0033] 401 - second electrode disk, 402 - second terminal, 403 - second electrode strip.

[0034] 701-outer insulating disk, 702-cylindrical hole, 703-inner insulating disk, 704-electrode strip through hole, 705-insulating column;

[0035] 1101-medicine blocking disc, 1102-medicine blocking strip.

[0036] The specific contents of the present invention are further explained in detail below in conjunction with embodiments. DETAILED DESCRIPTION

[0037] It should be noted that, unless otherwise specified, all components in the present invention are components known in the art.

[0038] Specific embodiments of the present invention are given below. It should be noted that the present invention is not limited to the following specific embodiments, and all equivalent changes made on the basis of the technical solution of this application fall within the protection scope of the present invention.

[0039] The present invention provides an electric ignition device without pyrotechnic agent, such as Figures 1 to 8 As shown, it comprises a shell 1, wherein the shell 1 comprises a top cover 101, a barrel 102 and a nozzle 103 which are fixedly connected in sequence, a through hole 12 is opened on the top cover 101, a glass frit 13 is installed in the through hole 12, and a first electrode 3 and a second electrode 4 are inserted and arranged in the axial direction inside the shell 1;

[0040] The first electrode 3 comprises a first electrode disk 301, a first terminal 302 arranged on the axial front end surface of the first electrode disk 301, and a plurality of first electrode strips 303 uniformly arranged around the edge of the axial rear end surface of the first electrode disk 301, wherein the plurality of first electrode strips 303 form a first electrode column, and a second through hole 304 is opened on the first electrode disk 301;

[0041] The second electrode 4 comprises a second electrode disk 401, a second terminal 402 arranged on the axial front end surface of the second electrode disk 401, and a plurality of second electrode strips 403 uniformly arranged around the edge of the second electrode disk 401, wherein the plurality of second electrode strips 403 form a second electrode column, the second electrode disk 401 is located inside the first electrode column, the second terminal 402 passes through the second through hole 304 on the first electrode disk 301, the first electrode column and the second electrode column are coaxial and have the same outer diameter; the first electrode strips 303 and the second electrode strips 403 are alternately arranged and spaced apart;

[0042] An insulating layer 5 is provided between the top cover 101 and the first electrode disk 301, an insulating partition 7 is provided between the first electrode disk 301 and the second electrode disk 401, the first terminal sequentially passes through the insulating layer 5 and the glass frit 13; the second terminal sequentially passes through the insulating partition 7, the insulating layer 5 and the glass frit 13;

[0043] The first electrode column and the second electrode column are both insulated from the shell 1 , and the interior of the first electrode column and the second electrode column and the cavity between them and the cylinder 102 are filled with an electrically controlled solid propellant charge 9 .

[0044] In the above technical solution, the electrically controlled solid propellant grain is an electrochemical solid propellant that controls the ignition, combustion and flameout of the propellant by turning the power on and off, and adjusts the burning speed of the propellant by adjusting the current / voltage. The adjustable burning rate characteristic of the electrically controlled solid propellant grain is affected by the working pressure, and there is a critical working pressure. When the working pressure is less than the pressure, the propellant combustion is adjustable, otherwise the propellant self-sustains combustion, and the burning rate only changes with the pressure and is not controlled by the voltage. Utilizing the above characteristics of the electrically controlled solid propellant grain, electrodes are set in the electrically controlled solid propellant grain, and the electrically controlled solid propellant grain is ignited after applying a voltage that meets the requirements, while ensuring that the electrically controlled solid propellant grain meets the self-sustaining combustion conditions when ignited, forming a stable ignition flame.

[0045] A power supply of a certain voltage is connected to the first terminal 301 and the second terminal 401. The voltage ensures that the gas pressure generated by the combustion of the electronically controlled solid propellant grain 9 is greater than the maximum controllable pressure of the electronically controlled solid propellant grain 9, thereby ensuring that the electronically controlled solid propellant grain is in a self-sustaining combustion state subsequently. At this time, a passage is formed between the power supply, the first electrode 3, the second electrode 4 and the electronically controlled solid propellant grain 9, and the electronically controlled solid propellant grain near the electrode is ignited under the action of the voltage, and burns radially inward and outward at the same time, generating high-temperature and high-pressure gas, which is ejected through the nozzle and wraps the main charge of the engine to realize engine ignition.

[0046] Electrodes and electrically controlled solid propellant charges 9 are directly used to replace the pyrotechnic ignition system in the current ignition device. Since the electrically controlled solid propellant charges 9 are insensitive to stimulation from dangerous sources such as open flames and high temperatures, the probability of accidental ignition is extremely small, and the risk is controllable. This can completely eliminate the safety risks of the current ignition device on sea-based, road-based, and space-based weapon platforms with high mechanical impact and high electromagnetic radiation. It is safer than the current ignition device, avoids safety and risk factors caused by pyrotechnics, and solves the technical problem of low safety of the ignition device in the prior art.

[0047] Specifically, the insulating partition 7 includes an outer insulating disk 701, a cylindrical hole 702 is opened in the middle of the outer insulating disk 701, an inner insulating disk 703 is fixedly installed in the cylindrical hole 702, and the axial front end and the axial rear end of the inner insulating disk 703 are reserved with grooves for the first electrode disk 301 and the second electrode disk 401, and the edge of the inner insulating disk 703 is uniformly provided with electrode strip passing holes 704 along the circumferential direction; an insulating column 705 is arranged on the axial front end surface of the inner insulating disk 703, which adapts to the structural design of the first electrode disk and the second electrode disk, and ensures the insulation between the first electrode disk and the second electrode disk, as well as the insulation between the first electrode column and the second electrode column.

[0048] Specifically, two first through holes 2 are formed on the glass frit, and two third through holes 6 are formed on the insulating layer 5 ; and a fourth through hole 8 penetrating the inner insulating disk 703 is formed on the insulating column 705 .

[0049] Specifically, the first terminal 302 passes through the third through hole 6 and the first through hole 2 in sequence; the second terminal 402 passes through the fourth through hole 8, the third through hole 6 and the first through hole 2 in sequence.

[0050] Specifically, a plurality of fifth through holes 10 are provided on the curved surface of the nozzle 103 to ensure that the gas generated by the combustion of the electronically controlled solid propellant grain can effectively cover the main charge of the engine. The distribution and number of the fifth through holes are determined according to the actual design of the engine.

[0051] Specifically, a sealing layer is provided between the insulating partition 7 and the first electrode disk 301 and the second electrode disk 401 , a sealing layer is provided between the insulating layer 5 and the top cover 101 , and a sealing layer is provided at the contact points between the insulating layer 5 , the insulating partition 7 and the shell 1 .

[0052] Specifically, a medicine baffle 11 is provided on the axial rear end face of the electrically controlled solid propellant grain 9, and the axial rear end face of the medicine baffle 11 is clamped on the axial front end face of the nozzle 103 to ensure that the electrically controlled solid propellant grain does not move in the axial direction and only burns and shrinks in the radial direction.

[0053] Specifically, the drug blocking plate 11 includes a drug blocking disc 1101 and drug blocking strips 1102 evenly distributed along the circumference of the drug blocking disc 1101. The drug blocking disc 1101 and the drug blocking strips 1102 can not only ensure that the drug column does not move axially, but also ensure that the smoke generated by combustion can enter the nozzle.

Claims

1. An electric ignition device without pyrotechnic agent, comprising a housing (1), characterized in that: The shell (1) comprises a top cover (101), a barrel (102) and a nozzle (103) which are fixedly connected in sequence; a through hole (12) is provided on the top cover (101); a glass frit (13) is installed in the through hole (12); a first electrode (3) and a second electrode (4) are inserted and arranged axially inside the shell (1); The first electrode (3) comprises a first electrode disk (301), a first terminal (302) arranged on the axial front end surface of the first electrode disk (301), and a plurality of first electrode strips (303) uniformly arranged around the edge of the axial rear end surface of the first electrode disk (301), the plurality of first electrode strips (303) forming a first electrode column, and a second through hole (304) is provided on the first electrode disk (301); The second electrode (4) comprises a second electrode disk (401), a second terminal (402) arranged on the axial front end surface of the second electrode disk (401), and a plurality of second electrode strips (403) uniformly arranged around the edge of the second electrode disk (401), the plurality of second electrode strips (403) forming a second electrode column, the second electrode disk (401) being located inside the first electrode column, the second terminal (402) passing through the second through hole (304) on the first electrode disk (301), the first electrode column and the second electrode column being coaxial and having the same outer diameter; the first electrode strips (303) and the second electrode strips (403) being alternately arranged and spaced apart; An insulating layer (5) is provided between the top cover (101) and the first electrode disk (301), an insulating partition (7) is provided between the first electrode disk (301) and the second electrode disk (401), the first terminal sequentially passes through the insulating layer (5) and the glass frit (13); the second terminal sequentially passes through the insulating partition (7), the insulating layer (5) and the glass frit (13); The first electrode column and the second electrode column are both insulated from the shell (1), and the interior of the first electrode column and the second electrode column and the cavity between the first electrode column and the cylinder (102) are filled with an electrically controlled solid propellant charge (9); The insulating partition (7) comprises an outer insulating disk (701), a cylindrical hole (702) is provided in the middle of the outer insulating disk (701), an inner insulating disk (703) is fixedly installed in the cylindrical hole (702), grooves for the first electrode disk (301) and the second electrode disk (401) are reserved at the axial front end and the axial rear end of the inner insulating disk (703), and electrode strip passing holes (704) are uniformly provided at the edge of the inner insulating disk (703) along the circumferential direction; an insulating column (705) is provided on the axial front end surface of the inner insulating disk (703); The glass sinter is provided with two first through holes (2), and the insulating layer (5) is provided with two third through holes (6); the insulating column (705) is provided with a fourth through hole (8) penetrating the inner insulating disk (703); The first terminal (302) passes through the third through hole (6) and the first through hole (2) in sequence; the second terminal (402) passes through the fourth through hole (8), the third through hole (6) and the first through hole (2) in sequence; A plurality of fifth through holes (10) are provided on the curved surface of the nozzle (103); A sealing layer is provided between the insulating partition (7) and the first electrode disk (301) and the second electrode disk (401); a sealing layer is provided between the insulating layer (5) and the top cover (101); and a sealing layer is provided at the contact points between the insulating layer (5), the insulating partition (7) and the housing (1); A medicine baffle plate (11) is provided on the axial rear end surface of the electrically controlled solid propellant grain (9), and the axial rear end surface of the medicine baffle plate (11) is clamped on the axial front end surface of the nozzle (103); The drug blocking plate (11) comprises a drug blocking disc (1101) and drug blocking strips (1102) evenly distributed along the circumference of the drug blocking disc (1101).

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