RU2349867C2 - Cap-detonator with electronic delay - Google Patents

Abstract

FIELD: explosive works.

SUBSTANCE: cap-detonator with an electronic delay contains the case in which are placed an igniter, electronic unit of detonation delay, primary and secondary explosives, knot of initiation and a sensor, the delays placed before electronic unit. Thereat the sensor is executed with possibility of transformation of an impulse from an initiation and transfer source to its electronic knot of a delay which is programmed for certain time of a delay. Thus the sensor is executed with possibility of inclusion of electronic knot of a delay in the form of the photogauge or a temperature-sensitive element.

EFFECT: simplification of operation and cost reduction.

1 dwg

Description

The invention relates to the field of development of explosive devices with a fixed time delay of operation and can be used as part of electric detonators, pyrotechnic relays, initiation systems based on shock wave tubes (UHT), etc., during blasting operations in the mining industry, construction, military affairs, etc.

Practical application consists in initiating explosive charges (explosives) with a given time delay.

Known caps detonators with pyrotechnic slowdown nodes: A.I. Lurie Electric blasting charges. M .: Nedra, 1973 [1], A.S. USSR No. 1043982 [2], patent of the Russian Federation No. 2149341 [3] and others, in which the time delay is set by the burning time of pyrotechnic retarding compositions of different densities and formulations. The combustion features of pyrotechnic compositions determine the time spread in their combustion, equal to ~ 10% of the nominal value of the deceleration time. Therefore, in the manufacture of explosive devices with pyrotechnic moderators, the time intervals for each series of moderation are set to exclude the overlapping of adjacent series of moderation, within the probable time spread. As a result, controllability of the explosion is significantly reduced, especially when blasting with second slowdown times.

Accurate retardation intervals can be created using electronic detonators with electronic retardation (US Patent Nos. 6,173.651 dated 01.16.2001 [4], Russia No. 2147365 [5], 2211435 [6], etc.), in which the required retardation time is programmed immediately before the explosion, and the accuracy of setting time intervals is ~ 1 ms, in the range from 0 to 20 s. The cost of such programmable pre-blast devices (i-kon detonator see www.Orica.com) is 10 or more $ US, in addition, they have high requirements for the qualification of explosive personnel, as they provide for the management of digital programming and blasting devices.

The closest to the proposed one of the above can be considered a detonating device protected by RF patent No. 2211435, containing a housing and a charge of a blasting substance of bulk density, a charge of an initiating substance and an ignition unit made in the form of a metal spiral connected to an electronic module that is programmed for a certain delay time of blasting immediately before blasting in the field.

The objective of the invention is the creation of a high-precision electronic detonator with a programmable deceleration time in the manufacture of the signal, generated by the operation of the shock wave, electric igniter, magnetic or electromagnetic, as well as mechanical stress, etc., easy to operate and low cost.

The problem is solved due to the fact that the detonator capsule with electronic delay contains a housing in which the igniter is located, an electronic blast delay unit, a primary and secondary explosive, an initiation unit and a sensor located in front of the electronic delay unit, and the sensor is configured to convert a pulse from the initiation source and transmitting it to the electronic delay unit, which is programmed for a certain delay time, while the sensor is configured to turn on the electronic node in erzhki as a photosensor or a temperature sensor. "

The description of the device is illustrated in the block-modular diagram shown in the drawing, where:

1 - the housing of the detonator capsule; 2 - initiation node; 3 — a sensor unit converting a pulse from an initiation source 2 and transmitting it to an electronic initiation delay unit 4, which generates a delayed current pulse; 5 - igniter; 6 - primary explosive, 7 - secondary explosive.

In the housing 1 of the device are located: initiation unit 2 (UHT, electric igniter or mechanical impact); a sensor unit 3, converting the pulse from the initiation source 2 to an electric, triggering and supplying electronic initiation delay unit 4, which generates a delayed current pulse; igniter 5, triggered by a current pulse received from the electronic delay unit 4, initiating the detonation of an instant detonator capsule consisting of primary and secondary explosives - 6 and 7, respectively. As a sensor can be used:

- photosensors (photodiodes, phototransistors, photo resistances, bolometers);

- pyroelectric sensors;

- temperature sensors.

The device operates as follows.

The signal from the initiation unit 2 (light pulse, pressure or temperature pulse) is sensed by the sensor 3, which generates an electric signal that turns on and powers the electronic delay unit 4, in which the operation delays are programmed under stationary conditions. The delay electronic unit 4 generates a current pulse after a predetermined time, which enables the igniter 5 to trigger the primary and secondary explosives (instant detonator capsule).

The electronic delay unit can be implemented on the basis of modern electronic devices capable of programming them by known methods, or performed, as in the prototype, where the electronic module, which is connected to program the delay time to the two-wire charging-control line, includes a microprocessor, storage capacity, and an undermining key while the charging-control line is connected to the storage unit charging unit, made on a zener diode, a diode and a protective high-voltage capacitance, to the storage capacitance sub A step-down stabilizer whose output is connected to the microprocessor power output is clear, a series of connected blasting device and detonation key is connected to the storage capacitance, the control input of which is connected to the first signal output of the microprocessor, and a chain of series-connected charging resistor, measuring key and measuring capacitance, the common point of connection of the measuring key and the measuring capacitance is connected to the second signal output It has a microprocessor controlling the measuring key input connected to the microprocessor power supply circuit, a bidirectional matcher levels coupled with one input-output of the third output signal of the microprocessor, the other input-output - through the protective capacity of the line-charge control.

The electronic unit is programmed for a certain delay time on the charging-control line in stationary conditions during its manufacture, after which it is disconnected from the line. During operation, it is turned on by the sensor.

Work with such a device does not differ from that adopted when using SINV and other non-electric blasting systems, which does not require additional training for explosive personnel, while the controllability of the explosion is significantly increased. The absence of electrical wires and the need to program products on the block, immediately before the explosion, reduces the time for the preparation of the explosion and reduces the cost of its implementation.

Information sources

1. A.I. Lurie. Electric blasting charges. M .: Nedra, 1973

2. A.S. USSR No. 1043982.

3. RF patent No. 2149341.

4. US patent No. 6,173.651 from 01.16.2001.

5. RF patent No. 2147365 dated 06/15/1998, F42B 3/10, F42 C19 / 08.

6. RF patent No. 2211435 dated 06.06.2001, F42B 3/10, F42 C19 / 08.

7. RF patent №2161293.

Claims (1)

An electronic delay detonator capsule comprising a housing in which an igniter is located, an electronic explosion delay unit, primary and secondary explosives, an initiation unit and a sensor located in front of the electronic delay unit, the sensor being configured to convert a pulse from the initiation source and transmit it electronic delay unit, which is programmed for a certain delay time, characterized in that the sensor is configured to turn on the electronic delay unit in e photosensor or a temperature sensor.