CN107809898B

CN107809898B - Antistatic mechanism for electric initiating explosive device

Info

Publication number: CN107809898B
Application number: CN201711225072.6A
Authority: CN
Inventors: 胡延川; 王秋宇; 顾超; 刘清云
Original assignee: Sichuan Lanshi Technology Co ltd
Current assignee: Sichuan Lanshi Technology Co ltd
Priority date: 2017-11-29
Filing date: 2017-11-29
Publication date: 2020-08-04
Anticipated expiration: 2037-11-29
Also published as: CN107809898A

Abstract

The invention discloses an antistatic mechanism for an electric initiating explosive device, which comprises a PCB (printed circuit board), a shell, an electrode plug and an ignition powder, wherein the PCB, the electrode plug and the ignition powder are all positioned in the shell, the PCB, the electrode plug and the ignition powder are sequentially arranged in the shell, and the PCB is sealed in the shell; the PCB comprises an inner circle, an outer circle and an outer circle metal layer from inside to outside in sequence, the inner circle is connected with the leg wire of the electrode plug, the outer circle is connected with an external lead, and the outer circle metal layer is connected with the shell; the invention realizes the advantages of simple processing of parts, low cost and easy assembly control, and solves the safety problem of the current military initiating explosive devices.

Description

Antistatic mechanism for electric initiating explosive device

Technical Field

The invention relates to the field of safety design of electric initiating explosive devices, in particular to an anti-static mechanism for an electric initiating explosive device.

Background

Static electricity is often encountered in the production, use and storage of electric initiating explosive devices. Due to the ubiquitous existence of static electricity, explosion accidents caused by the static electricity are more, and huge losses are caused to personnel and property. Static electricity has become a primary factor affecting the safety of electric initiating explosive devices.

During storage, transportation, service handling, inspection, use, etc. of an electrical discharge article, each electrical discharge article may experience multiple electrostatic discharge shocks. Generally, accidental ignition of each electric initiating explosive device caused by electrostatic discharge stimulation cannot occur, but multiple electrostatic discharge impacts can cause the electric initiating explosive device to have certain blunted feeling, and further affect the action reliability of the product.

As static electricity affects the safety and reliability of the electric initiating explosive device, the best method for solving the static electricity interference of the electric initiating explosive device such as a bridge wire, a bridge belt and the like is to design the electric initiating explosive device to have an anti-static function. From the design approach analysis, there are generally three types: firstly, a 'blocking' electrostatic series design technology is adopted, an insulation system is designed in an initiating explosive device, and the insulation strength of an easily-punctured position is increased, so that the initiating explosive device cannot be punctured under the electrostatic discharge voltage; second, using agents that are insensitive to static electricity; third, the "discharge" electrostatic series design technology uses protective electrostatic discharge devices or materials to form electrostatic discharge channels. The first design has a certain probability and cannot really play a role in preventing static electricity. In the second design, the cost of the desensitizing agent is high, and the performance of the initiating explosive device may be sacrificed to a certain extent. The third design, is currently the most widely used one.

Three approaches are commonly used for "bleed off" electrostatic series design techniques: firstly, arranging an electrostatic air discharge channel; secondly, adopting an electrostatic discharge element; and thirdly, the semiconductor coating is adopted to discharge static electricity. The first design requires a small space, is good in manufacturability and good in impact resistance, and is the best 'bleeder' electrostatic design. The second design requires large space, is complex in manufacturability and has poor impact resistance. The third design requires small space and has poor manufacturability operation, which has influence on the performance of the initiating explosive device.

The main method for setting the electrostatic air leakage channel is to leave a small air gap of about 0.2mm between the pin wire and the metal shell between the pin shell and the pin wire of about 0.2mm between the pin wire and the pin wire. Due to the fact that most initiating explosive devices are small in size, the leg line rigidity is small, and the size of the air gap is about 0.2mm, the problems that parts are difficult to machine, the assembly process is difficult to control and the like exist in the implementation of the design technology.

Disclosure of Invention

The invention aims to provide an antistatic mechanism for an electric initiating explosive device, which aims to solve the problems.

In order to achieve the purpose, the technical scheme adopted by the invention is as follows: an antistatic mechanism for an electric initiating explosive device comprises a PCB, a shell, an electrode plug and an ignition powder, wherein the PCB, the electrode plug and the ignition powder are all positioned in the shell, the PCB, the electrode plug and the ignition powder are sequentially arranged in the shell, and the PCB is sealed in the shell; the PCB sequentially comprises an inner circle, an outer circle and an outer circle metal layer from inside to outside, the inner circle is connected with the leg wire of the electrode plug, the outer circle is connected with an external lead, and the outer circle metal layer is connected with the shell.

According to the invention, through arranging the PCB circuit, the production is controlled by a computer, so that the distance between each discharge tip and the air gap is accurately controlled; through initiating explosive device structural design, ensure that the PCB board is sealed inside the casing, and the air gap position of point of discharging is encircleed by the air.

As a preferred technical scheme: the number of the inner circle is four, and the number of the outer circle is four.

As a preferred technical scheme: the inner circle is connected with the leg wire of the electrode plug in a welding mode; the outer ring is connected with an external lead in a welding mode, and the outer ring metal layer is connected with the shell in a welding mode.

Compared with the prior art, the invention has the advantages that: the invention realizes the advantages of simple processing of parts, low cost and easy assembly control, and solves the safety problem of the current military initiating explosive devices. In particular, the method of manufacturing a semiconductor device,

in the prior art, sintered glass (ceramic) and machined metal parts are assembled into an electrode plug for control, the price of the electrode plug with the requirement of an anti-static channel is about 50 yuan per generation, and the price of the electrode plug without the requirement of the anti-static channel is about 20 yuan per generation; the price of the PCB without the antistatic channel is about 0.8 yuan, and the price of the PCB with the antistatic channel is about 1 yuan. The electrode plug and the PCB in the prior art are adopted, and the assembly yield is 0.85; the electrode plug and the PCB which are improved by the invention have the advantage that the assembly yield can reach 0.95.

Drawings

FIG. 1 is a schematic structural diagram of an embodiment of the present invention;

fig. 2 is a schematic structural diagram of the PCB of fig. 1.

In the figure: 1. a PCB board; 11. an inner circle; 12. an outer circle; 13. an outer metal layer; 2. a housing; 3. an electrode plug; 4. an ignition charge.

Detailed Description

The invention will be further explained with reference to the drawings.

Example (b):

referring to fig. 1 and 2, an antistatic mechanism for an electric initiating explosive device comprises a PCB board 1, a housing 2, an electrode plug 3 and an ignition powder 4, wherein the PCB board 1, the electrode plug 3 and the ignition powder 4 are all positioned in the housing 1, and the PCB board 1, the electrode plug 3 and the ignition powder 4 are sequentially arranged in the housing 1, and the PCB board 1 is sealed in the housing 2; the PCB board 1 includes four inner circles 11, four outer circles 12 and outer lane metal level 13 from interior to exterior in proper order, inner circle 11 with the leg wire of electrode stopper 3 passes through the welded mode and connects, outer lane circle 12 is connected through the welded mode with external wire, outer lane metal level 13 with casing 2 is connected through the welded mode.

The above description is only for the purpose of illustrating the preferred embodiments of the present invention and is not to be construed as limiting the invention, and any modifications, equivalents and improvements made within the spirit and principle of the present invention are intended to be included within the scope of the present invention.

Claims

1. The utility model provides an electrostatic mechanism is prevented to spark-erosion work piece which characterized in that: the ignition device comprises a PCB, a shell, an electrode plug and ignition powder, wherein the PCB, the electrode plug and the ignition powder are all positioned in the shell, the PCB, the electrode plug and the ignition powder are sequentially arranged in the shell, and the PCB is sealed in the shell; the PCB sequentially comprises an inner circle, an outer circle and an outer circle metal layer from inside to outside, the inner circle is connected with the leg wire of the electrode plug, the outer circle is connected with an external lead, and the outer circle metal layer is connected with the shell.

2. The electrostatic prevention mechanism for electric initiating explosive device according to claim 1, characterized in that: the number of the inner circle is four, and the number of the outer circle is four.

3. The electrostatic prevention mechanism for electric initiating explosive device according to claim 1, characterized in that: the inner circle is connected with the leg wire of the electrode plug in a welding mode; the outer ring is connected with an external lead in a welding mode, and the outer ring metal layer is connected with the shell in a welding mode.