RU1809044C - Object protective switching-off system - Google Patents

Abstract

SUMMARY OF THE INVENTION: a protective shutdown system of an object includes a transmitter 1 and receiver 2 of a sound pickup device, a communication line 3, an optical converter 7, an amplifier 9 and isolation diodes 4 and 10, an electrical contact device 11 and a power switch object 12. The principle of protective switching off consists in the fact that in order to increase the speed of protective shutdown of the object 7, an optocoupler LED is included in the communication line, which controls the phototransistor, which in turn acts on the switch. 1 ill.

Description

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The invention relates to the mining industry, and in particular to safety measures, and can be used to create technological schemes for the extraction of formations hazardous for sudden emissions of coal and gas.

The purpose of the invention is to increase the safety of work in the face by developing a rational scheme for protective shutdown of the object at a critical value of the intensity of acoustic emission of the rock mass.

To achieve this goal in the known seismic forecast system, consisting of transmitting and receiving units, as well as a connecting line, a special unit is used to remotely control the object by acoustic emission from the rock mass.

By switching the polarity of the power source and turning on the LEDs of the optoelectronic converter through the first decoupling diode into the connecting line of the sound-absorbing equipment (ZUA) and the second decoupling diode to the electrocontact device, the speed of the equipment and galvanic isolation of the seismic information and control signals are achieved.

The drawing shows a schematic diagram of the protective shutdown of the object.

The system comprises a transmitting 1 and a receiving 2 ZUA device, a communication line 3, a decoupling diode 4, resistors 5 and 6, an optoelectronic converter 7, a resistor 8, a transistor 9, a decoupling diode 10, an electrical contact device 11, a switch 12, and an object 13 .

The protective shutdown system operates as follows,

In the initial state of the system, a group device (circuit breaker or magnetic starter of mass production) is connected through closed contacts 4 and 5 of an electrical contact device of the type RKU 1M, since in the block circuit remotely | -

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After switching off the BS, the polarity of the power supply to the sound-collecting equipment is such that the LED of the optoelectronic converter (AE) LED connected through the decoupling diode UD1 is closed and no current flows to the optocoupler.

When switching the polarity of the power supply unit at the receiver of the ZUA by the operator of the seismic forecast service, a current will flow through the optoelectronic converter through the circuit: + power supply unit - communication line - resistor R2 - optocoupler LED UD - resistor R1 - decoupling diode UD1 - communication line - block nutrition. As the current passes, the collector-emitter junction resistance of the optoelectronic converter transistor decreases sharply, as a result of which the collector-base junction of the amplifier stage transistor VT1 opens. In this case, the relay of the electrical contact device 11 is activated via the circuit: + source - and turns off the switch 12. The switch removes power from the object.

Claims (1)

The claims A system for protective shutdown of an object according to the intensity of acoustic emission of a mountain massif, comprising receiving and transmitting blocks of sound-collecting equipment, interconnected by a communication line, and interconnected by an electrical contact device and a power switch of the object, characterized in that, in order to increase the speed of the system, it equipped with an optocoupler converter, an amplifier and decoupling diodes, the LED of the optocoupler through the first decoupling diode is connected to the communication line, and The optocoupler transistor is connected to the electrical contact device through a series-connected amplifier and a second decoupling diode.