RU2282818C2 - Blasting device - Google Patents

Abstract

FIELD: blasting operations, applicable in blasting of explosive charges in various branches of industry.

SUBSTANCE: the main explosive charge and the matrix of an inert material with a net of ducts and holes filled with an explosive is coated with an inert envelope with through holes above the projecting elements of the matrix explosive with a thickness exceeding the value of projection of these elements.

EFFECT: enhanced safety of the device in service.

1 dwg, 1 ex

Description

The invention relates to explosive technology and can be used to initiate charges of blasting and low-sensitivity explosives in various industries where blasting is used.

For an analogue, a device for generating a blast wave was taken, RF patent No. 2159935, priority from 08/05/97, published on 08/27/99, Bull. No. 24, which contains a source of initiation, a lattice of freeze-dried explosives with branched end sections, located on the main charge or on an additional layer of flexible explosives, acting as an intermediate detonator. The disadvantage of the prototype is the location of the lattice of freeze-dried explosives on the main charge or on an additional layer of flexible explosives, which reduces the level of security of the device.

For the prototype taken a flexible device for generating a blast wave, US patent No. 3430563, class. NKI 102-22, priority dated 07.08.63, published 04.03.69, which contains the main explosive charge, the electric activation unit, and the initiation unit, which is a matrix of flexible explosive with branched end sections located in the inert elastomer sheet so that the explosive a wave diverging from the electric engagement unit in the elastomer crosses a plurality of equal lengths of strips from the explosive and approaches a plurality of end sections of the explosive spaced evenly across the surface of the elastomer sheet. Thus, the main explosive charge is initiated simultaneously at points corresponding to the end sections in contact with it.

The disadvantage of the prototype is the location on the surface of the sheet of elastomer end sections BB, which reduces the level of security of the device.

Improving safety is one of the main challenges in blasting.

The technical result of the claimed invention is to provide a device with the best level of security.

This result is achieved by the fact that in an explosive device containing the main explosive charge and an inert material matrix with a network of channels and holes filled with the formation of protruding elements above the explosive matrix and activated from the initiation source, the matrix on the side of the channels and holes is covered with a shell with through holes above the protruding elements of the explosive, the thickness of which exceeds the size of the protrusion of the explosive above the matrix.

Coating the matrix with a shell with through holes above the protruding elements of the explosive matrix and a thickness greater than the protrusion, protects the explosives in the channels and holes from mechanical, shock-wave, bullet-fragmentation and inertial effects due to the fact that the resulting loads are perceived by the matrix and thus increasing the explosion safety of the explosive device.

The drawing shows a General view of the inventive explosive device, where 1 is the main explosive charge, 2 is a matrix with channels and holes filled with explosives, 3 is a shell with through holes above the protruding elements of the explosive matrix.

As an example of a specific implementation, we can cite a device consisting of a main charge 1 (BB - low-sensitivity explosive composition based on triaminotrinitrobenzene); matrices 2 made of PS-1 foam with a grid of channels with a cross section of 2 × 2 mm, through holes with a diameter of 3 mm, filled with plastic explosives and glued with EL-20 glue to the main explosive charge 1 on the surface opposite to the channel arrangement; shell 3 with a thickness of 0.5 mm from the ABS 2020 copolymer with through holes with a diameter of 4 mm above the openings filled with explosives, with a protrusion above the matrix of up to 0.4 mm glued to the matrix with EL-20 glue.

The device operates as follows. From the source of initiation of explosives in the initial section of the grid of channels of matrix 2, detonation is further detonated, propagating through channels filled with explosives, approaches almost simultaneously to explosives located in the set of through holes of the matrix, the latter detonating, undermines the main charge of explosives 1 at many points approximately uniformly distributed over the surface of the main charge. Under mechanical, shock-wave, bullet-fragmentation and inertial effects, the gasket 3 provides the passage of loads on the foam matrix 2, thereby relieving the loads from the explosives located in the channels and openings of the matrix and, thus, increases the explosion safety of the explosive device during operation.

Claims (1)

An explosive device containing the main explosive charge (BB) and an inert material matrix with a grid of channels and holes filled with the formation of protruding elements above the BB matrix and used from the initiation source, characterized in that the matrix on the side of the channels and holes is covered with a through holes above the protruding elements of the explosives, the thickness of which exceeds the size of the protrusion of the explosives above the matrix.