CN213631830U

CN213631830U - Ignition part structure of electronic detonator without initiating explosive

Info

Publication number: CN213631830U
Application number: CN202021981507.7U
Authority: CN
Inventors: 银庆宇; 谭津; 吴奎
Original assignee: Guizhou Qaml Of Science And Technology Co ltd
Current assignee: Guizhou Qaml Of Science And Technology Co ltd
Priority date: 2020-09-11
Filing date: 2020-09-11
Publication date: 2021-07-06
Anticipated expiration: 2030-09-11

Abstract

The invention belongs to the field of civil explosion, and particularly relates to an ignition part structure of an electronic detonator without initiating explosive, wherein an explosive foil JP1 is a cylindrical insulating plate 80, a conductive layer 70 is laid on the cylindrical end surface, three areas of an area A10, an area B20, an area C30, an area A10, an area B20 and an area C30 are respectively arranged on the conductive layer 70, the three areas are respectively provided with a lead connecting pin A11, a pin B21 and a pin C31, and one end of a separation groove between the area A10 and the area B20, which is close to the center of a circle, is conducted through an ignition resistor D40. According to the invention, the structure of the ignition part is improved, so that the energy of the energy storage capacitor of the whole control module of the electronic detonator is completely released, the design difficulty of an external circuit is reduced, and the cost of the control module is reduced.

Description

Ignition part structure of electronic detonator without initiating explosive

Technical Field

The invention belongs to the field of civil explosion, and particularly relates to an ignition piece structure of an electronic detonator without a primary explosive.

Background

The existing industrial electric detonator mainly comprises a leg wire, a plastic plug, a control module, an ignition bridge wire with ignition powder, a reinforcing cap, basic powder and a basic tube shell, wherein the basic powder is core powder charge in the existing industrial detonator and generally adopts DDNP dinitrodiazophenol initiating powder which has higher friction sensitivity and can explode when meeting fire. The ignition powder is wrapped on the ignition bridge wire, so that the ignition powder is vibrated to be broken and separated from the bridge wire in production and transportation, and the electronic detonator is prevented from being detonated. Because the electronic detonator has complex and variable use environment, in the process of detonation, the detonators detonated at the earlier stage can generate strong interference signals, generate very high superposed voltage and strong vibration waves, easily bring mechanical damage to the electronic detonator, and the ignition powder and the ignition bridge wire are damaged to cause the electronic detonator to fail to explode.

In addition, the sensitivity of the medicament is high, and the chemical property is unstable, so that the explosion safety accidents are very easy to happen in the daily production, transportation, storage and use processes of the existing industrial electric detonator and the existing digital electric detonator.

The electronic detonator is easy to have the above problems due to the ignition piece of the electronic detonator consisting of the traditional ignition powder and the ignition bridge wire. Therefore, the research on the electronic detonator which is initiated by the energy accumulation of the high-pressure plasma igniter is carried out, and particularly, when high-voltage current passes through a metal wire or an exploding foil, the metal wire or the exploding foil can be rapidly melted and vaporized, and can be diffused to a surrounding medium, plasma is generated, shock waves are formed, and basic explosive in the electronic detonator is detonated by the shock waves. Although the method solves the problem that the ignition bridge wire and the ignition powder of the traditional electronic detonator are easy to fall off and vibrate, the method also has new problems, has high requirements on components of a control module and a circuit, has large energy storage capacitance and increases the manufacturing cost of the electronic detonator. Meanwhile, the performance of components is improved, so that the volume of the whole control module is increased, the problem that the control module and a basic tube shell are assembled by an electronic detonator is also caused, and the control module cannot be arranged in the basic tube shell, so that the mechanical performance of the whole electronic detonator structure is reduced, the electronic detonator structure is extremely easy to deform in a complex blasting field, and the electronic detonator is prevented from being detonated due to the damage of a control module circuit.

Disclosure of Invention

The invention provides an ignition part structure of an electronic detonator without initiating explosive, which replaces an ignition part consisting of a traditional ignition bridge wire and ignition powder, and reduces the high requirements of an electronic detonator circuit for energy-gathered initiation of a high-voltage plasma igniter on components. The method is realized by the following technical scheme:

a structure of an ignition piece of an electronic detonator without initiating explosive is disclosed, wherein the ignition piece is an explosion foil JP1, an explosion foil JP1 is a cylindrical insulating plate 80, a conductive layer 70 is laid on the cylindrical end face, the conductive layer 70 is divided into an A area 10, a B area 20, a C area 30, the A area 10, the B area 20 and the C area 30 by a dividing groove, and a lead connecting pin A11, a pin B21 and a pin C31 are respectively arranged on the three areas, wherein one end of the dividing groove between the A area 10 and the B area 20, which is close to the center of a circle, is conducted through an ignition resistor D40.

The three pins are arranged on the ignition piece explosion foil JP1, when a discharge circuit control chip in the electronic detonator control module conducts a switch in the circuit, the energy storage capacitor of the control module is enabled to be conducted with the A, B pin and the switch of the explosion foil JP1, the energy storage capacitor C discharges to the ignition resistor D40 for the first time, and the ignition resistor D40 is caused to melt and gasify to form a plasma flow. After the capacitor C is discharged for the first time, energy is not released, at the moment, the A, C pin of the exploding foil JP1 is conducted by ion current, the current of the capacitor C1 passes through the A pin of the exploding foil JP1, the plasma current and the C pin of the exploding foil JP1, the plasma current is further energized and accelerated, stronger shock waves are formed, and the explosive is detonated.

Further, in order to ensure the stable connection of the wire with the exploding foil JP1 and prevent the electronic detonator from being refused to explode due to the disconnection of the contact point in the processing process, the wire connecting pin a11, the pin B21 and the pin C31 which are respectively arranged on the area a 10, the area B20 and the area C30 are round holes, and the inner walls of the round holes are made of metal, so that the wire can be inserted into the holes to ensure the connection reliability. In order to further ensure the reliability of the connection, the circular hole is a through hole penetrating the cylindrical insulating plate 70.

Further, the conductive layer 70 is a nickel-chromium alloy 71.

Further, the metal layer 72 with better conductivity than that of the nickel-chromium alloy 71 is attached to the nickel-chromium alloy 71, and the metal layer 72 is made of copper so as to increase the conductivity.

Further, the metal layer 72 is plated with a gold plating layer 73 to protect the entire exploding foil from oxidation.

Furthermore, the firing resistor D40 is nichrome, and a gold plating layer 73 may be attached to the surface of the firing resistor D40 to prevent oxidation, because the explosion bridge foil is selected to have a low melting and vaporization temperature, and the formed plasma has a high enough energy to form a higher temperature gas, which can rapidly ignite the explosive under the action of shock waves and high temperature. The melting vaporization temperature of nichrome is higher than that of copper which is easy to vaporize from an economic point of view and from a conductive property, and the resistivity is high enough to distribute more energy of the capacitor C1 to the firing resistor D40.

Furthermore, the lead connecting pins a11, B21 and C31 respectively arranged on the areas a 10, B20 and C30 are round holes, and the round holes penetrate through the whole of the nickel-chromium alloy 71, the metal layer 72 and the gold-plated layer 73 until the round holes touch the insulating plate 80. The B region 20 and the C region 30 are partially overlapped, and are isolated from each other by an insulating layer 81 in order to prevent conduction therebetween.

Furthermore, the insulating plate 80 is filled with the insulating layer 81 at the edges of the nichrome 71, the metal layer 72 and the gold plating layer 73 in the area a 10, the area B20 and the area C30 except for the area where the firing resistor D40 is located, and a space 61 is formed above the firing resistor D40.

Has the advantages that: the condition of whether the explosive can explode is to see the energy given to the explosive by the exploding foil, the energy obtained by the exploding foil is determined by the electric energy input by the capacitor, part of the energy of the capacitor is consumed in an external circuit, and the exploding foil with low resistance and low resistivity can improve the current density of the exploding foil. This is why the resistance and inductance of the external circuit are required to be sufficiently small, and therefore, attention is paid to the design of the external circuit, and the resistance and inductance of the external circuit should be made as small as possible. In the whole discharging circuit, the selection of the switch is very critical, the circuit needs to have enough small resistance and inductance during design, the requirement on the material is higher, the production and manufacturing cost of the whole electronic detonator is increased, and the popularization difficulty of the electronic detonator is increased.

The invention provides a firing part structure of an electronic detonator without initiating explosive, which is an improvement on an exploding foil JP1 in a discharge circuit, wherein a capacitor C discharges for the first time to ensure that a plasma flow obtained by melting and vaporizing an ignition resistor D has conductive performance, and the energy of the capacitor C is not completely released. Therefore, a pin is added on the exploding foil JP1, the capacitor C1 is conducted with the newly added pin of the exploding foil by utilizing the plasma current conductivity, the plasma current is further energized to form larger shock waves, and the explosive can be rapidly detonated to generate detonation under the action of high-temperature plasma.

And the structure of the exploding foil JP1 is further designed, and the A, B, C pin of the exploding foil JP1 is arranged into a through hole, so that the reliability of connection between the electronic detonator control module and the exploding foil JP1 is ensured, and the frequency of the electronic detonator refusing to explode is structurally reduced. In order to increase the ion concentration formed by the first vaporization of the capacitor C1, the edges of the gold plating layer 73 are filled with the insulating layer 81 outside the area where the firing resistor D40 is located on the a region 10, the B region 20 and the C region 30 on the insulating plate 80, and a space 61 is formed above the firing resistor D40, so that the plasma concentration of the whole space 61 after melting and vaporization is increased, and the rapid conduction between the A, C pins of the exploding foil JP1 can be realized. The invention can be applied to electronic detonators and can also be applied to the field of national defense and military industry, such as national defense and military industry ignition sources and the like.

Drawings

FIG. 1 schematic representation of exploding foil JP1

FIG. 2 is a schematic illustration of an exploded foil JP1 with the insulating layer 81 removed

FIG. 3 is a schematic view of an exploding foil JP1 with the insulating layer 81 and insulating sheet 80 removed

Detailed Description

The following detailed description of the embodiments of the present invention will be made with reference to the accompanying drawings, respectively:

a structure of an ignition piece of an electronic detonator without initiating explosive is disclosed, wherein the ignition piece is an explosive foil JP1, the ignition piece is a cylindrical insulating plate 80, a conductive layer 70 is laid on the cylindrical end face, the conductive layer 70 is divided into an A area 10, a B area 20, a C area 30, the A area 10, the B area 20 and the C area 30 by a dividing groove, a lead wire connecting pin A11, a pin B21 and a pin C31 are respectively arranged on the three areas, and one end, close to the center of a circle, of the dividing groove between the A area 10 and the B area 20 is conducted through an ignition resistor D40.

Furthermore, the wire connecting pins a11, B21 and C31 respectively disposed on the regions a 10, B20 and C30 are circular holes, and the inner walls of the circular holes are made of conductive material.

Further, the conductive layer 70 is a nickel-chromium alloy 71.

Furthermore, the conductive layer 70 is formed by attaching a metal layer 72 having a conductivity superior to that of the nichrome 71 to the nichrome 71.

Further, the metal layer 72 is plated with a gold plating layer 73.

Further, the ignition resistor D40 is a nickel-chromium alloy, and a gold plating layer 73 may further be coated on the nickel-chromium alloy to prevent the oxidation of the nickel-chromium alloy and reduce the conductivity.

Furthermore, the insulating plate 80 is filled with the insulating layer 81 at the edges of the nichrome 71, the metal layer 72 and the gold plating layer 73 in the area a, the area B and the area C30 except for the area where the firing resistor D40 is located, and a space 61 is formed above the firing resistor D40.

The present invention is not limited to the embodiments described in the detailed description, and those skilled in the art can obtain other embodiments according to the technical solution of the present invention, which also belongs to the technical innovation scope of the present invention. It will be apparent to those skilled in the art that various changes and modifications may be made in the present invention without departing from the spirit and scope of the invention. Thus, if such modifications and variations of the present invention fall within the technical scope of the claims of the present invention and their equivalents, the present invention is also intended to include such modifications and variations.

Claims

1. The ignition part structure is characterized in that the ignition part is an explosive foil JP1 and is a cylindrical insulating plate (80), a conductive layer (70) is laid on the cylindrical end face, the conductive layer (70) is divided into an area A (10), an area B (20), an area C (30), the area A (10), the area B (20) and the area C (30) by dividing grooves, and a lead connecting pin A (11), a pin B (21) and a pin C (31) are respectively arranged on the three areas of the area A (10), the area B (20) and the area C (30), wherein one end, close to the center of a circle, of the dividing groove between the area A (10) and the area B (20) is conducted through an ignition resistor D (40).

2. The ignition part structure of the electronic detonator without the initiating explosive according to claim 1, wherein the wire connecting pin A (11), the pin B (21) and the pin C (31) respectively arranged on the area A (10), the area B (20) and the area C (30) are round holes, and the inner wall of the round hole is made of a conductive material.

3. The detonator ignition member structure of claim 1 wherein the conductive layer (70) is a nickel-chromium alloy (71).

4. The ignition element structure of non-initiating agent electronic detonator according to claim 3 wherein said conductive layer (70) is formed by attaching a metal layer (72) having a conductivity superior to that of said nichrome (71) to said nichrome (71).

5. The ignition structure of non-primary explosive electronic detonators according to claim 4, wherein the metal layer (72) is coated with a gold plating (73).

6. The detonator ignition member structure of claim 1 wherein the firing resistor D (40) is a nickel-chromium alloy (71).

7. The ignition element structure of non-initiating explosive electronic detonator according to claim 6, wherein said firing resistor D (40) is a nickel-chromium alloy (71) and is attached with a gold-plated layer (73).

8. The ignition element structure of the electronic detonator without initiating agent according to claim 5, wherein the insulating plate (80) is filled with the insulating layer (81) at the edges of the nichrome (71), the metal layer (72) and the gold-plated layer (73) in the area A (10), the area B (20) and the area C (30) outside the area where the ignition resistance D (40) is located, and a space (61) is formed above the ignition resistance D (40).