SU1739020A1 - Automatic control device for dispersed elements of mining complex - Google Patents

Abstract

The invention relates to the mining industry, in particular, to means of automated control of coal mining complexes, which allows to increase the control safety, for this switch 31 on direction is equipped with an additional closing contact (LC) 31.4, which placed in switch 31 LC 31.3 allows the facility to turn on only in given direction. ЗК 31.1. and 31.2 set the direction of switching objects, LC 31.3 and 31.4 enable switching of interchangeable objects only in the direction chosen by LC 31.1 or 31.2. When closing the DC 31.2, the relay 36 is on, the relay 37 is off. In line x 19 "E

Description

The invention relates to the mining industry and is intended for the automated or remote control of a coal mining complex.

A device for automatically controlling distributed objects of a coal mining complex is known, which contains an actuator, a sensor and an object position monitoring relay on each object, equipped with a delay element including a capacitor and a resistor, an actuator on relay, a switch on the adjacent objects into which the transistor enters, capacitor, resistors, and electromagnetic relay. The control post of each support section also contains a power button and a power button, connection terminals for the circuits from the position control sensor and the actuator. The control posts among themselves and with the control unit, located on the drift, are connected by trunk lines. These lines simultaneously perform the functions of power lines and specifying the direction of switching on objects. Adjacent control stations are interconnected by a command transmission line in both directions. The circuit also contains diodes.

Closest to the proposed device is the automatic control of distributed objects of the coal mining complex. This device contains on each object an actuator, a sensor and an object position monitoring relay, equipped with a delay element, including a capacitor and a resistor, an actuator switching-on relay, a switch-on relay for adjacent objects, which includes a transistor, a capacitor, resistors, and also electromagnetic relay. The control post of each section of the support also contains a button for switching on the relay of adjacent objects and a button for disconnecting, terminals for connecting circuits from the position control sensor and the actuator. Control posts between each other and with the power supply and control unit,

located on the drift are connected by main power lines. Adjacent control stations are interconnected by a command transmission line in both directions. The circuit contains diodes. The device is also equipped on each object with a switch containing the first and second closing contacts, diodes, and the line specifying the direction of switching on the objects. The power and control unit, located on the grommet, contains the first and second relays.

A disadvantage of the known device is low control safety. This is determined by the fact that if the line for setting the direction for switching on objects is damaged, for example, if the line is broken, the installation of the direction for switching on objects or the previously set direction may fail, which can lead to equipment breakdowns and injury to the staff: the operator turns on (n + 1) section, and may include {n-1} -.

The purpose of the invention is to increase the safety of management.

This goal is achieved by the fact that in the automatic control device for distributed objects of a coal mining complex, containing a power supply and control unit, located on the drift and connected by the first and second power lines and the power direction setting line with control posts located on the support sections and connected in series between the first and second power lines, the line for setting the direction of activation and the command transmission line, each control post containing a shutdown button connected between the first and second power lines, the direction switch connecting the first direct and the second back-connected diodes to the direction reference line to the second power line, a diode bridge, the diagonal of which is connected to the power lines, an object position control relay, parallel to which a delay element is turned on, a relay for switching on an adjacent object, the first disconnecting contact of which is connected to the first terminals of the windings of the switching on of the actuator and the relay for controlling the position of an object with a negative cable the house of the diode bridge to which the first output of the actuator is connected via the first closing contact of the actuator activation relay, the second output of which is connected to the positive terminal of the diode bridge via the second closing contact of the actuator activation relay and the third closing contact contact of the actuator activation relay - with the anode of the third diode, which is connected via the first closing contact of the position control relay The second output of the actuator relay and the cathodes of the fourth and fifth diodes, the anodes of which are connected to adjacent command transmission lines, the third diode cathode is connected to the second output of the object position control relay and through the second and third closing contacts of the object position control relay respectively the positive terminal of the diode bridge and the first terminal of the relay for switching on an adjacent object, the second and third terminals of which are connected via the disconnecting and fourth closing contacts of the relay for actuating The mechanism with the negative terminal of the diode bridge, the sixth and seventh diodes, whose cathodes are connected to the first and second power lines, respectively, and the anodes, respectively, through the second and third disconnecting contacts of the switching on of adjacent objects, to the anodes of the fourth and fifth diodes. respectively, through the first and second closing contacts of the relay for switching on adjacent objects are connected to the second and first power lines, the closing contact, the first terminal of which is connected to the first terminal of the switching on relay of adjacent objects, switches The switch-on direction of the objects is provided with an additional closing contact, the first terminal of which is connected to the first terminal of the closing contact, the second terminals of which are connected respectively to the first and second power lines, and the closing contact is located in the switch-on direction of the object.

The drawing shows a schematic diagram of the proposed device.

The device contains on each object an actuator 1, a sensor 2 and a relay 3 controlling the position of an object with closing contacts 3.1 - 3.3, equipped with a delay element, including a capacitor 4 and a resistor 5, an actuator switching on relay 6 with closing contacts 6.1 - 6.4 and disconnecting 6.4, a relay for switching on an adjacent object, in which a transistor 7, a capacitor 8, resistors 9-11, and also an electromagnetic relay 12 with contacts 12.1-12.3. The control post 13 of each lining section also contains a circuit 14 for switching on the switching on of adjacent objects and a shutdown button 15, terminals 16-18 for connecting the circuit of the sender 2 for monitoring the position and the actuator 1.

The control posts 13 among themselves and with the power supply and control unit located on the drift are connected by power supply lines 19 and 20. Adjacent control posts 13 are interconnected by command transmission line 21 in both directions. The circuit contains diodes: 23–26 is a diode bridge, 22 is the third, 27 is the fourth, 28 is the fifth, 29 is the sixth and 30 is the seventh. The device is also equipped on each object with a directional switch 31, containing the first 31.1 and second 31.2 closing contacts, the first 32 and second 33 diodes, as well as a line 34 for setting the switching direction. The power and control unit 35, located on the grommet, contains the first relay 36 with opening contacts 36.1 - 36.3 and the second relay 37 with opening contacts 37.1 and 37.2 and closing 37.1.

The device is additionally equipped on each object with two closing contacts 31.3 and 31.4 in the switch 31 of the direction of switching on the objects, the first terminals of which are respectively connected to different power lines 19 and 20, and the second terminals to the turning-on circuit 14 of the switching-on relay 12 of the adjacent objects 13.

The device works as follows.

In the initial state, the voltage is disconnected and all relays are disconnected. When power is supplied, the first relay 36 is turned on and through its contacts 36.1 and 36.2 supplies + to power line 19 and - to power line 20. The circuit is prepared to include objects from control stations 13 in the forward direction.

Switching on and selecting the direction of switching objects is carried out by briefly switching the switch of direction of switching on objects 31 to one or another side, while contacts 31.1 and 31.2 set the direction of switching objects backward or forward, respectively, and contacts 31.3 and 31.A relay 12 switching on adjacent objects only when specifying the specified direction of switching objects.

Consider first the case of switching objects in the forward direction. In switch 31, contacts 31.2 and 31.4 are briefly closed, and the closure of contact 31.2 will not lead to a change in the indicated state of the circuit, since diode 33 does not conduct a negative potential. When the contact 31.4 is closed, the switch 31 of the control station of the nth object turns on the relay 12 via the following circuit: + power supply - contact 37.2 - closing element of contact 36.1 - line 19 - contact 31.4 - relay winding 12 - transistor 7 - disconnecting element of contact 6.4 - diode 23 - line 20 - closing element of the contact 36.2 - - power supply. In this case, the relay 6 activates the actuator in the control post of the (n + 1) -th object along the circuit: + power supply - contact

37.2- closing element of contact 36.1 - line 19 - closing element of contact

12.3 control points of the nth object - line 21 - diode 27 of the control station (n + 1) -th object - relay winding 6 - contact 12.1 - diode 23 - line 20 - closing element of the power supply contact 36.2.

When the contact of sensor 2 is closed (the object has not completed the shifting), the relay 3 controls the position of the object and the relay 6 becomes self-locking. Relay 3 is connected via the following circuit: + power supply - line 19 - diode 25 - contact 6.2 - sensor contact 2 - contact 6.3 - diode 22 - relay 3 winding - contact 12.1 - - power supply. Relay 6 becomes self-blocking via its own contact. At this moment, the charge of capacitors 4 and 8 will begin and the emitter circuit of transistor 7 will break, to the base of which a closing potential will be supplied through the closing element of the switching contact 6.4 of relay 6. When relay 6 is turned on, actuator 1 will turn on and the object will move. After the object has been moved, the contact of sensor 2 is opened and relay 6 and actuator 1 are disconnected. At this moment, the emitter circuit of transistor 7 closes through the disconnecting element of switching contact 6.4 and the capacitor 6 starts discharging, keeping transistor 7 in the closed position.

After the discharge of the capacitor 8, the transistor 7 opens and the switching on of adjacent objects 12 is switched on via the following circuit: + power supply - line 19, diode 25 - contacts 3.1 - 3.3 relay 3 - relay winding 12 - transistor 7 - disconnecting element of switching contact 6.4 of relay 6 - diode 23 - line 20 - -

power source.

Relay 12 with its contacts will break the power supply circuit of relay 3 and transmit a signal for switching on the following (n + 2) -th object along the circuit: + power supply - line 19 closing element of the switching contact 12.2 of relay 12 (n + 1) -th object - line 21 - diode 27 (n + 2) -th object - winding of the relay 6 - - power supply.

The capacitor 4, charged by this moment before the voltage of the power source, after the break of the power circuit of the winding of the relay 3 will keep the relay 3, and therefore the relay 12 in the switched on state

some time sufficient to fully turn on the relay 6 of the next object. Subsequent objects are included similarly until all objects are moved.

A button 15, performing a technological stop of the movement of an object, is located at each control station and operates according to the principle of creating a short circuit for a power source.

In this case, the circuit returns to its original state when all its elements are de-energized. Intrinsically safe sources used in the device, short circuit mode.

In order to turn on the objects in the opposite direction, the switch 31 briefly closes the contacts 31.1 and 31.3. In this case, the relay 37 will turn on and break the power supply circuit of the relay 36, which

disconnects. Relay 37 is connected via the following circuit: + power supply - relay 37 winding - line 34 - diode 32 - contact 31.1- line 20 - closing element of contact 36.2 - - power supply. During the period of time when the opening contact 37.2 of the relay 37 is open, and the opening contact 36.3 of the relay 36 has not yet closed, the power lines will be de-energized and the object's activated relays will disappear. After the relay 36 is disconnected, its switching contacts 36.1 and 36.2 - the power supply will be supplied to power supply line 19, and + the power supply source - to power supply line 20. When the polarity of the voltage changes in lines 19 and 20 of the power supply diode 32

It prevents the signal from passing to the line 34 specifying the direction of switching on the objects, and the relay 37 becomes self-blocking via its own switching contact 37.1. In this case, the relay 12 is switched on by the contact 31.3 of the switch 31. The objects are switched in the opposite direction as follows: the initial starting circuit is switched using the switching contact of the left switching contact of the relay 12, and the signal for switching on the next object is transmitted in the opposite direction .

If it is necessary to change the direction of switching on the objects from the reverse direction to the direct switch 31, they short-circuit the contacts 31.2 and 31.4, thus creating a short-circuit mode for the power sources. Short circuit: + power supply - disconnecting contact 36.3 - disconnecting element of contact 36.2 - line 20 - contact 31.2 of switch 31 - diode 33 - line 34 - closing element of contact.37.1 - - power supply.

The circuit returns to its original state when all its elements are de-energized — all relays are turned off, and then 36 is turned on, + the power supply is fed to power supply 19, the power supply — to power supply 20, and then relay 12 is turned on.

In the proposed device, switching on an object is possible only in the direction specified by the operator, and only if it confirms the normal functioning of the node specifying the direction of switching objects (lines 19, 20 and 34, relay 36 and 37), in other words, switching on the object is possible if polarity power lines in lines 19 and 20 coincide with the specified direction of switching objects. This provides a protective failure in case of damage to the node specifying the direction of switching objects, therefore, it allows to increase the control safety.

Claims (1)

Invention Formula A device for automatic control of distributed objects of a coal-mining complex, containing a power supply and control unit, located on the drift and connected by first and second power supply lines and a line for specifying the switching direction with control posts located on support sections and sequentially interconnected with each other and a second power line, a line for setting the direction of activation, and a command transmission line, each control station comprising a shutdown button connected between the first and second lines of pi ani, a direction switch connecting the first and the second back-switched diodes to the direction setting line to the second power line, a diode bridge, the diagonal of which is connected to the power lines, an object position control relay, in parallel, a delay element, a turn-on relay an adjacent object whose first break contact connects the first leads 0 windings of actuating relay and object position control relay with minus terminal of a diode post to which the first output of the actuator is connected via the first closing contact of the actuator activation relay to the positive terminal of the diode via the second closing contact of the actuator 0 of the bridge, and through the series-connected disconnecting contact of the sensor and the third closing contact of the actuator activation relay to the anode of the third diode, which is connected through the first 5 closing contact of the object position control relay with the second output of the actuating relay and the cathodes of the fourth and fifth diodes, the anodes of which are connected to adjacent lines 0 transmission of commands, the cathode of the third diode is connected to the second output of the relay controlling the position of the object and through the second and third closing contacts of the relay controlling the position of the object, respectively, with a positive 5 by the output of the diode bridge and the first output of the relay for switching on an adjacent object, the second and third terminals of which are connected via the disconnecting and fourth closing contacts of the relay for switching on the executive 0 mechanism with a negative output diode bridge, the sixth and seventh diodes, the cathodes of which are connected respectively to the first and second power lines, and the anodes, respectively, through the second and third disconnecting contacts of the switching on of adjacent objects to the anodes of the fourth and fifth diodes, which respectively through the first and second closing contacts of the relay for switching on adjacent objects are connected to 0 by the second and first power lines, the closing contact, the first terminal of which is connected to the first terminal of the switching on of adjacent objects, characterized in that, in order to increase safety 5 of the control, the switch-on direction of the objects is provided with an additional closing contact, the first terminal of which is connected to the first terminal of the closing contact, the second terminals of which are connected according to 11173902012 but with the first and second power lines, the switch direction switch and the closing contact is placed in the object.