CN-122015124-A - Planar three-electrode switch igniter based on electrode ablation

Abstract

The invention discloses a planar three-electrode switch igniter based on electrode ablation, which belongs to the technical field of electric pulse driving, ignition and detonation, and comprises a base, a base and a base, wherein a plug is embedded in the base; the plug is provided with a pin hole, a pin is fixedly connected in the pin hole, the pin comprises a trigger pin, a cathode pin and an anode pin, a planar three-electrode switch is arranged on the upper surface of the plug, the planar three-electrode switch comprises a trigger electrode, a cathode and an anode, an insulating ring is arranged on the upper surface of the planar three-electrode switch, a medicine ring is arranged on the upper surface of the insulating ring, ignition powder columns are arranged in the medicine ring, and a pipe shell is embedded and arranged on the periphery of the base. The invention utilizes the phenomenon that the planar three-electrode switch is easy to ablate when being conducted, realizes the ignition of electric explosion plasma, avoids the complex structure and the action process of the impact sheet ignition tube, meets the safety requirement of 500V non-ignition, and has the advantages of easy mass production, low price and the like.

Inventors

• XU CONG
• Chen Qiuxun

Assignees

• 西南科技大学

Dates

Publication Date

20260512

Application Date

20260414

Claims (10)

1. 1. A planar three-electrode switch igniter based on electrode ablation, comprising: A base, in which a plug is fitted; the plug is provided with pin holes, and each pin hole is fixedly connected with a pin, wherein the pin comprises a trigger pin, a cathode pin and an anode pin; The plane three-electrode switch is arranged on the upper surface of the plug and comprises a trigger electrode, a cathode and an anode, wherein the anode is provided with a head bulge; an insulating ring arranged on the upper surface of the planar three-electrode switch; A powder ring arranged on the upper surface of the insulating ring, wherein ignition powder columns are arranged in the powder ring; and the tube shell is embedded and arranged on the periphery of the base.
2. 2. The planar three electrode switch igniter based on electrode ablation of claim 1 wherein the plug material comprises one of Al 2 O 3 ceramic, quartz glass, polymethyl methacrylate.
3. 3. The planar three-electrode switch igniter based on electrode ablation according to claim 1, wherein the pin is one of a Cu pin, an Al pin or a pin with a metal film on the surface, and the metal film comprises one of Au, ag, cu, al, ni.
4. 4. The electrode ablation based planar three electrode switch igniter of claim 1 wherein the upper end surface of the plug is flush with the upper end surface of the pin.
5. 5. The planar three-electrode switch igniter based on electrode ablation according to claim 1, wherein the planar three-electrode switch is prepared on the upper surface of the plug by one of electroplating, magnetron sputtering and thermal evaporation, the planar three-electrode switch is made of one of Au, ag, cu, al, ni, the thickness of the planar three-electrode switch is 2-5 μm, the gap between the anode and the cathode is 0.6-1.6 mm, and the gap between the trigger electrode and the anode and the gap between the trigger electrode and the cathode are 0.1-0.5 mm.
6. 6. The planar three-electrode switch igniter based on electrode ablation according to claim 1, wherein the anode and the cathode of the planar three-electrode switch are of semicircular structures, the anode and the cathode are arranged oppositely, the head of the anode protrudes towards the cathode, the trigger electrode is provided with a strip protrusion, and the strip protrusion of the trigger electrode extends between the anode and the cathode.
7. 7. The planar three-electrode switch igniter based on electrode ablation according to claim 1, wherein the insulating ring material is one selected from the group consisting of ceramics, polyimide, epoxy, polymethyl methacrylate.
8. 8. The planar three-electrode switch igniter based on electrode ablation according to claim 1, wherein the inner wall of the medicine ring is tightly attached to the outer wall of the ignition medicine column, and the medicine ring is made of one of stainless steel, al, cu, polysulfone and polymethyl methacrylate.
9. 9. The planar three-electrode switch igniter based on electrode ablation of claim 1, wherein said igniter cartridge is one of B/KNO 3 , al/PTFE, mg-Al/nitrocotton, mg-Al/black powder.
10. 10. The planar three-electrode switch igniter based on electrode ablation according to claim 1, wherein the base and the plug are fixed by threaded connection or glue bonding, and the tube shell and the base are fixed by threaded connection or welding; The outer surface of the upper part of the tube shell is provided with a cross notch.

Description

Planar three-electrode switch igniter based on electrode ablation Technical Field The invention belongs to the technical field of electric pulse driving, ignition and detonation, and particularly relates to a planar three-electrode switch igniter based on electrode ablation. Background The impact sheet ignition tube is an in-line type initiating explosive device for realizing impact ignition based on a metal electric explosion driving flying sheet, and has become a key component in the field of solid rocket engine ignition due to the technical advantages of high safety, high reliability and the like. In an in-line ignition system, a high voltage switch is a key element for driving a strike plate squib. With the development of in-line ignition systems toward low cost, miniaturization and the like, the conventional cold cathode trigger tube cannot meet the related technical requirements due to complex structure and high cost, and the planarization switch technology becomes a main stream research direction of high-voltage switches. In the technical route of the planar switch, the planar three-electrode switch is widely focused due to the advantages of high on-current, high response speed, simple structure, low price, easy mass production and the like. For example, the Chinese patent CN109341430A adopts MEMS technology to prepare the planar three-electrode switch, thereby realizing batch production and reducing the preparation cost. The conventional planar three-electrode switch has remarkable electrode ablation phenomenon in practical application, so that the service life of the planar three-electrode switch is short, and the application of the planar three-electrode switch in an in-line ignition system is limited to a certain extent. The invention directly utilizes the ablation phenomenon, realizes ignition by the electrode head electric explosion plasma, avoids the use of an impact sheet ignition tube, greatly simplifies an in-line ignition system and reduces the cost. On the other hand, considering the possibility of surface discharge of the grain surface, an insulating ring is arranged between the planar three-electrode switch and the grain to improve the safety and reliability of ignition. Disclosure of Invention It is an object of the present invention to address at least the above problems and/or disadvantages and to provide at least the advantages described below. To achieve these objects and other advantages and in accordance with the purpose of the invention, as embodied and broadly described herein, there is provided a planar three-electrode switching igniter based on electrode ablation, comprising: A base, in which a plug is fitted; the plug is provided with pin holes, and each pin hole is fixedly connected with a pin, wherein the pin comprises a trigger pin, a cathode pin and an anode pin; The plane three-electrode switch is arranged on the upper surface of the plug and comprises a trigger electrode, a cathode and an anode, wherein the anode is provided with a head bulge; an insulating ring arranged on the upper surface of the planar three-electrode switch; A powder ring arranged on the upper surface of the insulating ring, wherein ignition powder columns are arranged in the powder ring; and the tube shell is embedded and arranged on the periphery of the base. Preferably, the material of the plug comprises one of Al 2O3 ceramic, quartz glass and polymethyl methacrylate. Preferably, the contact pin is one of a Cu contact pin, an Al contact pin or a contact pin with a metal film coated on the surface, and the metal film comprises one of Au, ag, cu, al, ni. Preferably, the upper end surface of the plug is flush with the upper end surface of the pin. Preferably, the planar three-electrode switch is prepared on the upper surface of the plug by one of electroplating, magnetron sputtering and thermal evaporation, the material of the planar three-electrode switch is Au, ag, cu, al, ni, the thickness of the planar three-electrode switch is 2-5 μm, the gap between the anode and the cathode is 0.6-1.6 mm, and the gap between the trigger electrode and the anode and between the trigger electrode and the cathode is 0.1-0.5 mm. Preferably, the anode and the cathode of the planar three-electrode switch are in a semicircular structure, the anode and the cathode are arranged oppositely, the head of the anode protrudes towards the cathode, the trigger electrode is provided with a strip protrusion, and the strip protrusion of the trigger electrode extends into the space between the anode and the cathode. Preferably, the insulating ring material is selected from one of ceramics, polyimide, epoxy resin and polymethyl methacrylate. Preferably, the inner wall of the medicine ring is tightly attached to the outer wall of the ignition medicine column, and the medicine ring is made of one of stainless steel, al, cu, polysulfone and polymethyl methacrylate. Preferably, the ignition powder column is one of B/KNO 3, al/PTFE, m