SU1364720A1 - Spark-proof system for mine communication,signalling and machine halting - Google Patents

Abstract

This invention relates to remote control of downhole machines and mechanisms in coal mines. The goal is to expand the functionality of the system by identifying the subscriber devices (AU) 16-1., 16-n, in which the stop jyiortKa 18 or 19 is clamped, or by determining the location of the cable damage. From the power supply 3 of the drift device 2, the supply wires (P) 13, 14 are energized to the communication blocks 17 in the AU 16 and the converter 21 of the end unit 20. From its output windings 22, 23 through additional P 11, 12, disconnecting the contacts of the stop buttons 18, 19 AU 16 and the separation diodes 9, 10 of the device 2 voltage, rectified by the diodes 24 ;, 25, are fed to the stop relays 7, 8. The contacts 29 of the relay 7, 8 prepare a circuit for a warning signal ( PS) and permission to start the machine using connected via make contacts 6, 30 to the device inputs 2 instruments 1 & S (l

Description

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control, From source 3, through pin 6, the generator 4 PS and relay 5 of the PS control are supplied. The output of generator 4 is through an isolating capacitor 35 and contacts 30 and 29 is connected to the signal terminal 15. Through the second separator capacitor 36, terminal 15 is connected to the input of relay 5. The negative terminal of relay 5 is connected to the negative terminals of generator 4 and source 3. Each AU 16 is equipped with a diode 33 and a resistor 34. The cathode of diode 33 is connected to the positive P 11, and the anode through the resistor 34 is connected to the 64720

P 12. In order to determine the number of the AU 16 in which the stop button 18 or 19 is clamped, the contacts 27, 28 of the switch P 13, 14 are connected to P 11,, 12. The deviation of the arrow connected to the switch of the measuring device 26 corresponds to the number of the AU 16, in which the button 18 or 19 is held down. T.A., R 11 and 12 are used to pass variable PS and communication signals, and R 15 is common to relay 7, 8 and the signal for the communication blocks 17 AU 16. 1 Il.

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The invention relates to electrical engineering, and more specifically to devices for remote control of bottomhole machines and mechanisms in coal mines, as well as in other enterprises where. possible formation of explosive atmospheres.

The aim of the invention is to expand the functionality of the system due to the possibility of determining the subscriber devices in which the stop button is clamped, or determining the location of the cable damage.

The drawing shows a functional diagram of an intrinsically safe mine communication system, warning alarm and shutdown of machines.

The system contains control equipment 1, a stray device 2 with an intrinsically safe source of direct current 3, a generator 4 warned. signal, relay 5 control signal, closing contact 6 of control equipment, stop relays 7 and 8 separation diodes 9 and 10, positive additional wire 11, negative additional wire 12, supplying positive 13 and negative 14 wires, signal wire 15, subscriber devices 16-1 ... 16-p, communication unit 17, stop buttons 18 and 19, end unit 20, converter 21, two output windings 22 and 23, rectifying diodes 24 and 25, measuring device 26,

the closing contacts 27 and 28 of the switch, the closing contacts 29 of the stop relays 7 and 8, the closing contact 30 of the control equipment,

Additional capacitors 31 and 32, diode 33, resistor 34 and separation capacitors 35 and 36.

To the power source 3 through the closing contact 6 of the equipment 1 control

laziness connected warning generator

of the signal (GPS) 4 and the signal control relay (RKS) 5, Stop relays 7 and 8 are connected to the signal wire by one of the winding terminals, and the second terminals are connected to additional wires 11 and 12 via dividing diodes 9 and 10, respectively. The signal cable 15 is connected to the input РКС 5 directly, and the output of GPS 4 through the closing contact 30 of the control equipment 1 and the parallel connected closing contacts 29 stop relays 7 and 8. In addition, in the drift device 2 the signal wire 15 is connected to the stop wires 11 and 12 through additional capacitors 31 and 32.

In each subscriber unit 16-1 ... 16-n, the communication unit 17 is connected

to the supply wires 13 and 14, and the input to the signal wire 15. In the circuit of the additional wires 11 and 12, between which are connected in series, connected diode 33 and resistor 34,

. The break contacts are included. buttons 18 and 19. In the end block

20k to power supply wires 13 and 14, converter 21 is connected. Output windings 22 and 23 of the latter are connected via rectifier diodes 24 and 25 to stop wires 11 and 12, and the second outputs of windings are connected to a signal wire 15.

The proposed system works as follows.

From the power source 3 via the power supply wires 13 and 14, power is supplied to the communication blocks 17 in the subscriber devices 16-1 ... 16-n and to the converter

21end block 20. With output windings 22 and 23 of voltage converter 21, rectified by diodes 24

and 25 through additional wires 11 and 12, disconnecting contacts 18 and 1 of subscriber devices 16-1 ..., 16-p and separation diodes 9 and 10 of the drift device 2, are fed to the stop relays 7 and 8, which by their own terms 29 prepare a circuit for giving a warning signal and allowing the machines to start up using the control equipment 1.

In the initial state before starting the machine, relays 7 and 8 are on, contacts

29 closed. When the Start command is issued in control equipment 1, pins 6 and 30 are closed. Power is supplied from source 3 to GPS

4 and РКС 5, the output of the GPS 4 through the separation capacitor 35. And contacts

30 and 29 is connected to the signal wire 15 and further to the input of the PKC 5 and to the inputs of the communication blocks 17. Subscriber units 16-1 ... 16-n reproduce the warning signal, from the pressure of the last РКС 5 triggers and

his contacts gives permission to turn on the machine.

When the Stop button is pressed in one of the subscriber devices 16, as well as when one or both of the additional wires 11 and 12 are broken or short, the corresponding winding of the stop relays de-energizes and ensures the machine stops. Connecting the signal wire 15 to one of the piggy wire 13 or 14 leads to the initiation of the input РКС 5, which does not activate during the warning signal and makes it impossible to turn on the machine.

When the stop button is pressed 18 or 19, as well as when the signal wire 15 is broken, the warning signal

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It arrives at the inputs of the communication block 17 through additional capacitors 31 or 32. Thus, the integrity of the stop lines is automatically monitored and a reliable control signal is provided to pass the warning signal before starting the machine.

Wire 15 is used as a common for stop relays 7 and 8 for generating a warning signal, as well as signaling for communication unit 17 of subscriber units 16-1 ... 16-n in b communication, which results in reducing the number of cable cores ( one cable conductor 15 is used to pass four signals). Supply wire 14, additional wires 11 and 12 are used for passing direct current and alternating warning and communication signals.

To determine the number of the nearest subscriber unit 16, in which the stop button 18 and 19 is clamped, by the closing contacts 27 and 28 of the switch, the supply wires 13 and 14 are connected to an additional 11 and 12. The isolation diodes 9 and 10 stop relays 7 and 8 are closed and the current is through The measuring device 26 corresponds to the number of connected chains consisting of a diode 33 and a resistor 34. The device 26 determines the number of the subscriber device 16, in which the stop button 18 or 19 is clamped. If one of the additional wires is picked, ob- place rsha determined anapogichnsh manner. When the stop wires are closed and the switch is turned on, spark protection is triggered, as indicated by the indication of the source 3 of the power supply.

Diagnosis of the stop buttons allows the personnel on the roadway to determine the location of the damage.

cable or clamped button, which significantly reduces the search time. In the absence of D1 agnostics and indications, personnel need to monitor all subscriber devices and cable, the latter can be filled up with rock in many places, hidden under other cables, which further increases the time to search for damage.

Since in this system the stop command circuits are galvanically separated from the power supply 3 source circuits,

and the safe power of the latter increases by 30-40%,

The basic object for the proposed intrinsically safe system of mine communications, warning signaling and stopping of machines is the AUS equipment. Compared with the base object, the proposed system has the following advantages: a greater number of subscriber devices up to 30 (in the base object - 15), a reduction in the number of used wires - 5 (in the base object 7), a reduction in the repair time and search for the clamped button due to diagnostics.

Claims (1)

Invention Formula The intrinsically safe system of the mine communication, preventive alarming and stopping of the machines, including control equipment, a drift device containing an intrinsically safe power source, the outputs of which are connected to the power supply wires, two line relays, into one of the winding terminals of each which included the separation diode, and the anode of the first separation diode is connected to the positive, and the cathode of the second separation diode - to the negative additional wires, subscriber devices connected to the supply, additional and signal wires, with a drift device and an end block, each subscriber unit containing a communication unit and stop buttons-C with disconnecting contacts in the circuits of additional wires, and the end unit contains a voltage converter with two output windings, one of the terminals of the first of which is connected to the anode of the first rectifying diode, the cathode of which is connected to a positive additional wire, and one of the conclusions of the second is connected to the cathode of the second rectifier diode, the anode of which is connected 0 15 0 thirty 25 5 DS 40 with a negative additional wire, characterized in that, in order to expand the functionality of the system, the drift device is equipped with a warning signal generator, a signal control relay, two separation and two additional capacitors, a measuring device and a switch with closing contacts, one of which is connected There is a positive supply wire with a negative additional wire through the measuring device, and the other is a negative supply wire with a positive additional Auxiliary wire, the generator output of the warning signal through the first isolating capacitor, the closing contact an -; - control parameters, in parallel the closing contacts of the stop relays are connected to the signal wire, to which other terminals of the windings of the stop relays and connected to each other are also connected the other is the first pins of additional capacitors, the second pins of which are connected to the additional wires, the signal wire is connected to the the signal control relay input, the negative power output of which is connected to the negative power supply terminal of the warning signal generator and the negative power supply unit terminal, and the positive power supply outputs of the signal control relay and the alarm signal generator are connected to each other and are connected to the positive terminal through the make contact power supply, each subscriber unit is equipped with a diode and an resistor, and the cathode of the diode is connected to a positive additional wire home, and the anode through a resistor - with a negative additional wire.