RU216508U1 - ELECTRIC INITIATOR WITH SELF-SHUT-OFF WIRES - Google Patents

Abstract

The utility model relates to pyrotechnic devices of the automation system, in which self-shutdown is required when the activation circuits are triggered from a current source, and can be used in the design of various devices and devices for explosive automation. Electrical initiator with self-disconnection of wires comprises a housing 7, in which an electric igniter 1 is installed with wires 8 placed in the radial channels of a dielectric insulator made in the form of a glass, with a non-metallic piston 2 installed in it, in which longitudinal channels are made with wires placed in them, and a groove under the sealing cuff 6. The electric initiator is equipped with an electrically insulating gasket 4 installed between the body of the electric initiator and the dielectric insulator, on which the circuit for monitoring the initial state of the electric initiator is installed, the non-metallic piston 2 is additionally equipped with at least one more groove under the sealing cuff 6, and at the end opposite to the dielectric insulator a sealing membrane 9 is installed in the body of the electric initiator. The electrical insulating gasket 4 is made of a dielectric material. The initial state control circuit is made in the form of a conductive wire. The technical result consists in expanding the operational capabilities of the electric initiator with self-disconnection of wires by simplifying the design, ensuring testability, and increasing the reliability of self-disconnection of wires. 2 w.p. f-ly, 2 ill.

Description

The utility model relates to pyrotechnic devices of the automation system, in which self-disconnection is required when the activation circuits are triggered from a current source, and can be used in the design of various devices and devices for explosive automation.

A known device is described in US patent No. 3941056, IPC F42B 3/12; F42D 1/04, publ. 1975 under the name "Electric initiator with self-shutdown of wires".

The disadvantages of this device include the fact that when the device is triggered, the housing cavity, in which the broken wires connected to the power source are located, is covered with an electrically conductive layer of combustion products, which can lead to a short circuit of the power source.

The closest and selected as a prototype is the device described in the utility model patent No. 650 414 IPC F42B 3/12; F42D 1/04, publ. 10/10/1995, under the name "Electric initiator with self-shutdown of wires". The device contains a housing in which an electric igniter is installed with wires placed in the radial channels of a dielectric insulator made in the form of a glass with a non-metallic piston installed in it, in which longitudinal channels are made with wires placed in them and a groove for a sealing cuff.

The disadvantages of the prototype include:

shearable collar of non-metallic piston;

small area of the sealing cuff;

a large volume of the cavity for the formation of pressure of powder gases;

the possibility of connecting the wires cut off when the electric initiator is triggered to the case, which can lead to a short circuit of the power source; absence of the initial state control circuit.

The objective of the utility model is to create a small-sized device that is easy to manufacture, providing, when triggered, reliable self-disconnection of the electric initiator wires from the power source and breaking the initial state control circuit, as well as providing control of the device state before and after triggering.

The technical result consists in expanding the operational capabilities of the electric initiator with self-disconnection of wires by simplifying the design, ensuring testability, and increasing the reliability of self-disconnection of wires.

The specified technical result is achieved by the fact that the electric initiator with self-disconnection of wires, containing a housing in which an electric igniter is installed with wires placed in the radial channels of a dielectric insulator made in the form of a glass, with a non-metallic piston installed in it, in which longitudinal channels are made with placed in them wires and a groove for a sealing cuff, according to the utility model, is equipped with an electrically insulating gasket installed between the body of the electric initiator and a dielectric insulator, on which the circuit for monitoring the initial state of the electric initiator is installed, the non-metallic piston is additionally equipped with at least one more groove for the sealing cuff, and on a sealing membrane is installed opposite to the dielectric insulator.

In addition, to exclude the possibility of electrical contact between the wires cut off when the electric initiator is triggered and the case, the electrical insulating gasket is made of a dielectric material.

In addition, to ensure control of the state of the device before and after operation, the control circuit of the initial state is made in the form of a conductive wire.

The analysis of the prior art carried out by the applicant, including searching through patent and scientific and technical sources of information and identifying sources containing information about analogues of the claimed utility model, made it possible to establish that the applicant did not find an analogue characterized by features identical to all essential features of the claimed utility model, and the definition from the list of identified analogues of the prototype, as the analogue closest in terms of set of features, made it possible to identify a set of distinctive features that are significant in relation to the technical result perceived by the applicant in the claimed object, set forth in the formula of the utility model.

Therefore, the claimed utility model meets the requirement of "novelty" under the current legislation.

The utility model is illustrated in the drawings:

figure 1 shows the design of the electric initiator;

figure 2 section A-A, where the following items are entered:

1 - electric igniter;

2 - non-metallic piston;

3 - dielectric insulator;

4 - electrical insulating gasket;

5 - initial state control circuit;

6 - sealing cuffs;

7 - housing of the electric initiator;

8 - wires;

9 - membrane.

Electric initiator with self-disconnection of wires contains (see Fig.) a metal case 7, in which a bridge electric igniter 1 with wires 8, a non-metallic piston 2 with at least two grooves for sealing cuffs 6, a dielectric insulator 3, made in the form of a glass with radial channels for placing the conductors 8, the initial state control circuit 5 (see Fig. 2), the electrical insulating gasket 4 and the sealing membrane 9. The sealing cuffs 6 are designed to prevent the ingress of gaseous products of the operation of the electric igniter 1 into the cavity of the dielectric insulator 3. Electrical insulating gasket 4 is designed to exclude the possibility of wires 8 touching the metal case of the electric initiator 7 when triggered. The sealing membrane 9 seals the cavity B of the proposed device.

The work of the proposed technical solution is carried out as follows. When a current pulse is applied to the electric igniter 1, it ignites. As a result, a pressure pulse is formed in cavity B, under the action of which the electric igniter 1 and piston 2 move into the insulator 3. When the electric igniter 1 moves, the conductors 8 (activation circuits), the initial state control circuit 5 are destroyed and, accordingly, the electric igniter 1 is disconnected from current source. Then, under the action of a pressure pulse, the membrane 9 is destroyed and the fire pulse exits into the external environment.

At the enterprise, prototypes of various pyrotechnic devices were manufactured, in which, to disconnect the wires from the power source, the non-metallic piston 2 is made of press material, it contains two grooves for sealing cuffs 6 made of PTFE, the dielectric insulator 3 is made of press material, the initial state control circuit 5 is made in the form of copper wire, the insulating gasket 4 is made of PTFE.

The use of this utility model makes it possible to ensure the testability of the device, simplify its design and increase reliability. The main advantages of this device are testability, safety, reliability.

Thus, the electric initiator with self-disconnection of wires, embodied in the claimed utility model, in its implementation is able to achieve the achieved technical result seen by the applicant.

Therefore, the claimed utility model meets the condition of "industrial applicability".

Claims (3)

1. Electric initiator with self-disconnection of wires, containing a housing in which an electric igniter is installed with wires placed in the radial channels of a dielectric insulator made in the form of a glass, with a non-metallic piston installed in it, in which longitudinal channels are made with wires placed in them and a groove under the sealing cuff, characterized in that it is equipped with an electrically insulating gasket installed between the body of the electric initiator and the dielectric insulator, on which the control circuit of the initial state of the electric initiator is installed, the non-metallic piston is additionally equipped with at least one more groove for the sealing cuff, and on the opposite end of the dielectric insulator the housing of the electric initiator is equipped with a sealing membrane. 2. Electric initiator with self-disconnection of wires according to claim 1, characterized in that the insulating gasket is made of a dielectric material. 3. Electric initiator with self-disconnection of wires according to claim 1, characterized in that the initial state control circuit is made in the form of a conductive wire.

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