RU2810659C1 - Ultrasonic initiator device - Google Patents

Abstract

FIELD: explosion-proof blasting means.

SUBSTANCE: invention can be used as a small-sized explosion-proof means of initiating explosives in explosive automatic devices. The ultrasonic initiating device comprises a housing 1 in the form of a glass with an internal shelf 3 with an opening along the axis. The bottom of the housing 1 is equipped with sealed leads 8 with electrical leads 9, the explosive charge 2 from the PTS is located in contact with the upper surface of the inner shelf 3 of the housing 1 and the surface of the initiator 5, made in the form of a stepped disk. Housing 1 is equipped with a piezoelectric transducer 7 located between conductive contact plates 6, one of which is located at the bottom of housing 1 and connected to electrical inputs 9, and the second is in contact with initiator 5. The initiator 5 is located between the current-conducting contact plate 6, with a plane with a large diameter at the base resting on it, and a dielectric separating ring 4, made, for example, of fluoroplastic, and abutting the lower surface of the inner shelf 3 of the housing 1.

EFFECT: increase in efficiency due to layer-by-layer combustion of the charge and a stable flame force, simplification of the device design and improved manufacturability due to the possibility of making initiators separately from the device body, safety due to increased resistance to static electricity.

4 cl, 1 dwg

Description

The invention relates to the field of explosion-proof means of blasting and can be used as a small-sized explosion-proof means of initiating explosives in explosive automatic devices.

A known device is described in RF patent No. 2389971 IPC F42C 19/12, publ. 05/20/2010 The device contains a sleeve with a liner in which an explosive charge is placed, made in the form of hinges, an initiator installed on a block separated by a spark gap with current leads.

The disadvantages of the known technical solution include:

- complexity of making the bridge;

- relatively large overall dimensions;

An electric igniter is also known, described in the RF utility model patent No. 84532, IPC F42B 3/10, F42C 19/08, publ. 03/10/2009, containing an ignition charge placed in a cap having an outlet hole, pressed by rolling the open end of the housing to the upper disk electrode mounted on a non-current-carrying gasket and electrically connected by a filament bridge to a central current lead equipped with a sealing flange, which is isolated from the upper electrode non-current-carrying gasket, and from the body with a mounting block, and interacts with the lower disk electrode.

The disadvantages of an electric igniter include:

- difficulty in manufacturing;

- it is impossible to use heat-resistant compounds.

The closest and chosen as a prototype is the ignition device described in RF patent No. 2 252 389, IPC F42C 19/12, publ. 05/20/2005 The device under consideration contains a housing, a sealed lead-in with built-in electrical leads, an explosive charge, and an initiator.

The disadvantages of the known device include:

- difficulty in manufacturing;

- increased overall dimensions due to the presence of a spark gap;

- it is impossible to use heat-resistant compounds.

The objective of the invention is to improve the operational capabilities, namely the operating efficiency, safety and reliability of the device in question, while ensuring high ignition ability and while simultaneously simplifying the design of the device.

The technical result is to increase efficiency due to layer-by-layer combustion of the charge and a stable flame force, simplify the design of the device and improve manufacturability due to the possibility of making initiators separately from the device body, safety due to increased resistance to static electricity.

The specified technical result is achieved by the fact that in an ultrasonic initiating device containing a housing, a sealed lead with built-in electrical leads, an explosive charge, an initiator, according to the invention, the housing is made in the form of a glass with an internal shelf with an opening along the axis, the bottom of which is equipped with sealed leads with electrical leads, equipped with a piezoelectric a converter located between current-conducting contact plates, one of which is in contact with the bottom of the housing and connected to the electrical inputs, and the second is in contact with the initiator, made in the form of a stepped disk in cross-section, resting on it with a plane with a large diameter at the base, and a dielectric separating ring, placed between the initiator and the lower surface of the inner shelf of the housing, while the explosive charge is located in contact with the upper surface of the inner shelf, its hole and the surface of the initiator with a smaller axial diameter to form a T-shaped section with the hole of the inner shelf.

In addition, in order to increase the damping effect, the separating ring is made of fluoroplastic.

In addition, in order to ensure the safe operation of the device, a pyrotechnic composition was used as an explosive.

In addition, in order to improve current conductivity, the contact plate is made in the form of a layer of sprayed material from an Ag-Sn alloy.

The analysis of the level of technology carried out by the applicant, including a search through patent and scientific and technical sources of information and identification of sources containing information about analogues of the claimed invention, allowed us to establish that the applicant had not discovered an analogue characterized by features identical to all essential features of the claimed invention, but a definition from the list identified analogues of the prototype, as the closest analogue in terms of the totality of features, made it possible to identify a set of distinctive features in the claimed object that are essential in relation to the technical result perceived by the applicant, as set out in the claims.

Consequently, the claimed invention meets the requirement of “novelty” under current legislation.

To check the compliance of the claimed invention with the conditions of inventive step, the applicant conducted an additional search for known solutions in order to identify features that coincide with the features of the claimed invention that are distinctive from the prototype, the results of which show that the claimed invention does not follow clearly from the known technical level for a specialist.

Therefore, the claimed invention meets the “inventive step” requirement.

The invention is illustrated in the drawing, where the following items are introduced:

1 - body;

2 - explosive charge;

3 - inner shelf;

4 - dielectric separating ring;

5 - initiator;

6 - conductive contact plates;

7 - piezoelectric transducer;

8 - pressure seals;

9 - electrical inputs.

The ultrasonic initiating device contains a housing 1, made in the form of a glass with an internal shelf 3 with an opening along the axis. The bottom of the housing 1 is equipped with pressure seals 8 with electrical leads 9, the explosive charge 2 is located in contact with the upper surface of the inner shelf 3 of the housing 1 and the surface of the initiator 5, made in the form of a stepped disk, with a smaller axial diameter, forming a T-shaped section with the hole of the internal shelf 3 of the body 1 and is made of PTS. Housing 1 is equipped with a piezoelectric transducer 7 located between current-conducting contact plates 6, one of which is located at the bottom of housing 1 and connected to electrical inputs 9, and the second is in contact with initiator 5, and is made, for example, of a sprayed silver-tin metal material. The initiator 5 is located between the current-conducting contact plate 6, with a plane with a large diameter at the base resting on it, and a dielectric separating ring 4, made, for example, of fluoroplastic, and abutting the lower surface of the inner shelf 3 of the housing 1.

The work is carried out as follows.

The ultrasonic initiating device is activated by applying an alternating voltage to the electrical inputs 9, which leads to deformation of the piezoelectric transducer 7 and the transmission of elastic vibrations to the initiator 5, resulting in the initiation of an explosive charge 2, sensitive to the effects of friction, installed in contact with the upper surface of the small diameter of the initiator 5.

An example of a specific implementation may be an ultrasonic initiating device in which a pyrotechnic composition is used as an explosive charge 2, the piezoelectric transducer 7 is made in the form of a piezoceramic cylinder, the initiator 5 is made in the form of a two-stage disk of a T-shaped section, the conductive contact plates 6 are made in the form of a layer of a metal alloy silver-gold, dielectric separating ring 4 is made of fluoroplastic.

The use of this invention will improve the efficiency of activation, safety and reliability of the ultrasonic initiating device due to the proposed design of the initiator and its placement in the upper end part of the ignition device.

For the claimed invention in the form as it is characterized in the claims, the possibility of its implementation using the above-described design solutions and the ability to achieve the specified technical result have been confirmed. Therefore, the claimed invention meets the condition of “industrial applicability”.

Claims (4)

1. An ultrasonic initiating device containing a housing, a pressure seal with built-in electrical inputs, an explosive charge and an initiator, characterized in that the housing is made in the form of a glass with an internal shelf with an opening along the axis, the bottom of which is equipped with pressure seals with electrical inputs, equipped with a piezoelectric transducer , located between current-conducting contact plates, one of which is in contact with the bottom of the housing and connected to the electrical inputs, and the second is in contact with the initiator, made in the form of a stepped disk in cross-section, resting on it with a plane with a large diameter at the base, and a dielectric separating ring placed between the initiator and the lower surface of the inner shelf of the housing, while the explosive charge is located in contact with the upper surface of the inner shelf, its hole and the surface of the initiator with a smaller axial diameter to form a T-shaped section with the hole of the inner shelf. 2. Ultrasonic initiating device according to claim 1, characterized in that the dielectric separating ring is made of fluoroplastic. 3. Ultrasonic initiating device according to claim 1, characterized in that a pyrotechnic composition is used as an explosive. 4. Ultrasonic initiating device according to claim 1, characterized in that the conductive contact plates are made in the form of a sprayed layer of Ag-Sn alloy material.

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