RU2324673C2 - Explosive cartridge with detonator socket - Google Patents

Abstract

FIELD: blasting.

SUBSTANCE: explosive cartridge includes cylindrical shell, wherein an explosive charge is disposed with an end-to-end channel and detonator socket, their inlets being connected by a groove. The cartridge explosive composition comprises 20-30% of tetranitropentaerytrite (TEN), 65-50% of trinitrotoluene (TNT) with addition of 15-20% of granulotol. The bottom end of the cartridge is protected with a polymeric disc.

EFFECT: reducing the sensitivity of explosive agent and manufacturing costs of the cartridge on retention of its explosive and operational performance.

3 cl, 2 dwg

Description

The invention relates to checkers-detonators for industrial blasting, including that it is intended for use in the non-electric initiation system of SINV, Edelin, Nonel, as well as from electric detonators, detonating cords.

It is used for reliable and safe initiation of charges and low-sensitivity industrial explosives (BB), including water-containing and water-based explosive explosives during explosive work on the earth's surface in all climatic zones of the Russian Federation and CIS countries.

Known pressed waterproofing TNT, rectangular checkers with a central channel (OST 84-1366-76), used as explosives in seismic and other types of geophysical work on the earth's surface, as well as intermediate detonators when conducting open blasting of mountain and non-negative nature . Known pressed waterproofed trotyl, trotylhexogen detonator checkers with a non-neutral channel of the following types: T-400G - pressed waterproofed TNT for blasting in wells of any water cut, including running water, with a charge in the water for up to 6 days; TG-500 - molten trotylhexogen for blasting in wells of any degree of water cut with an unlimited life of charges in water (OST 84-411-80).

There is also a checker-detonator according to patent No. 2089827, including a cylindrical paper waterproofing case, in which an explosive charge is placed with a through axial channel under the detonating cord and a blind channel under the detonator capsule or electric detonator.

The closest invention of the same purpose to the claimed combination of features is the checker-detonator according to patent No. 2177927, which is a cylindrical body in which an explosive charge is placed with a through channel and a socket, the inlet openings of which are connected by a recess. A detonator block was made from a mixture containing 50-70% of TNT and 50-30% of a mixture of TNT with pentoerythetetranitrate (TENA), which was poured into the casing from a polymeric material. The explosive composition uses highly dispersed heating elements.

This checker-detonator meets all the requirements of customers for the effectiveness of its use, but is quite expensive due to the use of highly dispersed heating elements in its composition.

When creating the invention, the task was to obtain a detonator block comparable in efficiency to the prototype, but less expensive in raw materials and manufacturing. To obtain such a technical result, the proposed detonator checker is made in a polymer case with a symmetrical arrangement of the through channel and the slot for the detonator capsule relative to the outer cylindrical surface of the checker; instead of the finely dispersed heater, it includes the usual heater; to increase efficiency, granulotol is added.

The proposed checker-detonator, including a cylindrical body, in which an explosive charge is placed with a through channel and a socket, the inlet openings of which are connected by a recess, made of a cast mixture containing 20-30% TENA, 65-50% TNT with 15-20% addition granulotol filled in a polymer case. The detonator checker has an additional socket for an electric detonator, from the bottom end the checker is protected by a polymer disk, which is installed at the time of filling and can be used for marking.

Studies have shown that replacing finely dispersed heating elements with heating elements does not reduce the initiating ability of low-sensitivity compounds and water-based explosive materials, and the presence of gas-filled TNT granules in combination with a heating element provides the necessary energy characteristics of a detonator plate.

The research data are shown in table 1.

Test results of drafts weighing 500 g with the addition of granulotol for the effectiveness of the explosion.

Table 1 Sample No. The composition of the checkers,% The amount of compression of a lead column TEN TNT cast Granulotol one* 40 60 - 7.65 2 * 40 60 - 7,975 3 40 45 fifteen 7.6 four 40 45 fifteen 7.55 5 thirty fifty twenty 6.35 6 thirty fifty twenty 7,025 7 thirty 55 fifteen 7,675 8 thirty 55 fifteen 8,075 9 twenty 60 twenty 7.05 10 twenty 60 twenty 7.20 eleven twenty 65 fifteen 7.70 12 twenty 65 fifteen 6,725 Note: * - the composition used highly dispersed heating elements

Thus, from table 1 it is seen that the proposed checker-detonator practically does not differ in effectiveness from the prototype, and the use of conventional heating elements with the addition of granulotol reduces the cost of its manufacture. Partial replacement of molten TNT with granulotol also leads to a reduction in its production time, thereby reducing labor costs.

The detonator checker at the request of the customer can be made in mass: 500 g, 750 g, etc., as well as with two holes for the detonator.

Production Example 1.

A detonator-checker (Fig. 1), containing a through channel 3 and socket 4, is made by pouring TNT melt with TNT with a parallel dosage of granulotol 1 into a polymer case 2. The case is a cylindrical shell with rounded edges at the ends and two annular protrusions on a cylindrical surface. From the bottom end, the checker is protected by a disk of polymer material, which is installed at the time of filling and is used for marking.

Production Example 2.

A detonator-checker (figure 2), containing a through channel 3, socket 4 and socket 5, is made by pouring TNT melt with TNT with a parallel dosage of granulotol 1 into a polymer case 2. The case is a cylindrical shell with rounded edges at the ends and two ring protrusions on a cylindrical surface. From the bottom end, the checker is protected by a disk of polymer material, which is installed at the time of filling and is used for marking.

Claims (3)

1. Checker-detonator, comprising a cylindrical body made of a polymeric material in which an explosive charge is placed, made with a through channel and a socket, the inlet openings of which are connected by a recess, and made of a mixture filled with trotyl and PETN, which is characterized in the mixture contains 20-30 wt.% TENA, 65-50 wt.% TNT and 15-20 wt.% granulotol. 2. Checker-detonator according to claim 1, characterized in that it additionally has a socket for an electric detonator. 3. Checker-detonator according to claim 2, characterized in that from the lower end it is protected by a polymer disk, which is installed at the time of pouring for use when marking.

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