RU133276U1 - DEVICE FOR LASER INITIATION OF DETONATION - Google Patents

Abstract

A detonation laser initiation device containing a semiconductor laser power supply unit, a semiconductor laser with an integrated optical fiber, the end of the optical fiber is in contact with the surface of the initiated part of the charge, a sleeve in which the main blasting explosive and easily initiated substance are placed, the high-density optical fiber shock absorber without a gap with the initiated charge, characterized in that the easily initiated substance is made of complex compounds of heavy metals: "tubing", "CIRCO N ”or TEN with the addition of 2.5% graphite, and the main blasting substance is made of TEN or HEXOGEN at a relative density of 0.75 ... 0.78.

Description

The utility model relates to the field of explosive technologies and can be used in mining, construction, geophysics, metal explosive processing, etc.

A device for transmitting laser pulses to optical detonators [1]. The explosion of groups of optical detonators in a given sequence is carried out with a minimum length of optical fibers. A device for transmitting laser pulses to optical detonators includes subversive elements with optical detonators connected through optical fibers to a laser radiation source. It is made in the form of a pulsed solid-state or semiconductor laser. The device is equipped with a quotation gas laser, an optical tube, as well as a switching device consisting of a rectangular prism with a mechanism for its rotation with a given frequency. There are also blocks for monitoring and regulating the rotational speed of a rectangular prism and optical lenses. In this case, the quoted gas laser is optically coupled to a rectangular prism through the active element of the solid-state laser. The input ends of the optical fibers from the optical detonators of subversive elements are placed in the focus of the optical lenses. This embodiment of the device allows you to send pulses from a solid-state laser to certain groups of optical detonators at specified intervals. Due to the presence of an air gap between the rectangular prism and optical lenses, the length of the optical fibers is significantly reduced.

The disadvantage of this device is the difficulty of alignment of the optical system, the high cost of its manufacture due to the presence of a large number of elements and their alignment when performing the layout. The cost of an explosive device increases significantly due to the presence of a large number of optical elements in the disposable system.

As a prototype of the proposed model, a laser detonation initiation device was selected [2], the operation of which is as follows. It includes a laser system power supply, a focusing optical system, and a device for transmitting laser radiation energy to the detonator. Its difference from previously known devices is that it uses a semiconductor laser, the launch of which is carried out through the signal encoding unit. The signal encoding unit protects the device from unauthorized initiation of an explosion. The power supply of the laser system provides a semiconductor laser. The flow of high-power pulsed laser radiation is focused by the optical system and fed to the energy transfer device to the detonator or squib. Through the input section of the optoelectronic system, the radiation enters the optical fiber and reaches the input focusing section. Detonation of a flammable substance with increased sensitivity to laser radiation is initiated by a focused radiation flux in the detonator or pyro cartridge case.

However, this device uses an expensive high-power pulsed semiconductor laser to initiate detonation of explosive radiation. The laser flux passes through a disposable optical system and fiber with a large loss of power. The radiation is focused inside the detonator or the squib with an insignificant accuracy in fixing the focal position relative to the surface of a substance of increased sensitivity to laser radiation.

The technical result is to reduce the energy loss of laser radiation to initiate the detonation of explosive high-energy substances (PETN, HEXOGEN, etc.), reduce the cost of manufacturing an explosive device when using low-power semiconductor lasers and eliminate optical elements, simplifying operation.

The technical result is achieved in that the scheme of the device for laser initiation of detonation of explosives has the form shown in Figure 1.

It contains: 1 - a power supply unit of a semiconductor laser, the launch of which is carried out through a signal coding unit, 2 - a semiconductor laser with an integrated optical fiber 3, which provides radiation transmission at a distance of 30 ... 50 m with a power density (10 ... 50 W / cm ² ), 4 - combined optical outlet, which transfers the radiation flux to a segment of optical fiber 5 with a power density (100 ... 500 W / cm ² ), the end of the optical fiber is in contact with the surface of the initiated part of the charge, 6 - the sleeve, which contains the initiated 7, 8 - the main blast explosive this substance and easily initiated 9 substances, 10 - a shock absorber, which ensures the accuracy of fixation of an optical fiber with an increased power density without a gap.

Easily initiated substance is made from complex compounds of heavy metals, for example, "tubing", "ZIRCON" or TENA with the addition of 2.5% graphite, and the main blasting substance is made from TENA or HEXOGEN at a relative density of 0.75 ... 0.78.

The technical result of the presence of graphite additive is to reduce the energy loss of laser radiation upon ignition of these complex compounds by reducing their reflective characteristics.

Complex compounds of heavy metals have the following types [3]:

TEN - pentaerythritol tetranitrate; HEXOGEN - cyclotrimethylene trinitramine; "NKT" - pentaminocobalt (III) perchlorate (3-nitrotetrazolato-N ² ), ZIRCON - perchlorate (V) - hydrazinotetrazolcadmium (II)

BIBLIOGRAPHY

1. Tarzhanov, V.I. Pre-explosive phenomena during the rapid initiation of blasting explosives [Text] / V.I. Tarzhanov // Physics of Combustion and Explosion, 2003, No. 3. S.10-12.

2. Tsipilev, V.P. A stand for studying the kinetics of explosive decomposition of condensed matter under the influence of pulses of laser radiation [Text] / V.P. Tsipilav // Technical science. Tomsk Polytechnic University. Tomsk, 2000.S.99-103.

3. Ilyushin M.A., Tselinsky I.V., Smirnov A.V., Bachrina I.V. Energy-intensive complexes as explosives for means of initiation. Proceedings of the St. Petersburg State Technological Institute. St. Petersburg, 2009-S65-81.

Prototype:

4. Tsipilev, V.P. Stand for research-, kinetics of explosive decomposition of condensed matter under the influence of pulses of laser radiation [Text] / V.P. Tsipilev // Technical science. Tomsk Polytechnic University. Tomsk, 2000.S.99-103.

Claims (1)

A detonation laser initiation device containing a semiconductor laser power supply unit, a semiconductor laser with an integrated optical fiber, the end of the optical fiber is in contact with the surface of the initiated part of the charge, a sleeve in which the main blasting explosive and easily initiated substance are placed, the high-density optical fiber shock absorber without a gap with the initiated charge, characterized in that the easily initiated substance is made of complex compounds of heavy metals: "tubing", "CIRCO N ”or TEN with the addition of 2.5% graphite, and the main blasting substance is made of TEN or HEXOGEN at a relative density of 0.75 ... 0.78.

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