SU1696726A1 - Device for control of mine door - Google Patents

Abstract

The invention relates to mountain promet and mb is used to control the air flow in the mine workings. The goal is to improve the accuracy of maintaining the desired air flow, reduce the energy consumption for regulation and increase the service life of the door by reducing the number of door actuators. The device contains five relays (P) 3-7, meter 8 and air flow adjuster 9, reference element 10, actuators (IE) 11 and 12, OR element, key elements 22 and 23, and limit switches (KB) 24 and 25 V the common part of the power supply circuits РЗ and 5 are connected in series the disconnected contact Р 6 and the closing contact Р 7. In addition, the power supply Р 3 is open

Description

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The door van is connected in series with the breaker contact KB 24 and the key element 22, and in the supply circuit P 4 for closing the doors - a separate contact KB 25 and the key element 23. The meter 8 and the setting device 9 are connected to the reference element 10, the outputs of which are connected to IE 11 and 12. Outputs OF 11 and 12 are connected to the element OR m to the control descents of the key elements 22 and 23. In the power supply P b, the closing contact P 7 and winding P 5

The invention relates to mining i can be used to control the flow of air in mine workings.

The purpose of the invention is to improve the accuracy of maintaining a given air flow rate, reducing energy consumption for regulating and increasing the service life of the door by reducing the number of actuator actuations.

Nz the drawing shows the functional system of the device.

The device contains a reversing under 1 door 2, an open relay 3 and a door closing relay 4, a pause time relay 5, an operating time relay 6 and an intermediate relay 7, an air flow meter 8, a setting device 9, a comparison element 10, output actuators 11 Open and S2 Close and the element OR 13. The control circuit of the reversing drive 1 includes the closing contact 14 of the fencing relay 3 and the closing contact 15 of the closing relay 4. Intermediate relay 7 has closing contacts 16 - 18 and disconnecting 19, relay 5 has closing contact 20, relay 6 - opening contact 21, key elements 22 and 23 respectively are connected to output actuators 11 and 12, End switches 24 and 25 respectively open and the closed positions of the door are respectively opening contacts 26 and 27. Relay 3 opening has a disconnecting contact 28, and closing role 4 has a disconnecting contact 29. For manual control of door 2, the device is equipped with a switch 30 with contacts 31 and 32. Devices It works as follows.

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When voltage is applied to the circuit, the door remains in its original position, since no relays receive power.

connected to the output of the element OR. The power supply circuit P 7 includes parallel-connected closing contacts P 5 and P 7 and a disconnecting contact P b in series with them. The reversing drive of the door is powered by opening the closing contact P 3 and disconnecting contact P 4 by means of serially connected make contact P 4 and open contact P 3. 1 sludge.

If the air flow rate measured by the meter 8 is within the control zone set by the setting device 9, the comparison element 10 does not generate a signal

to the output actuators 11 and 12, and the resistance of the key elements 22 and 23, the functions of which are equivalent to the functions of conventional make contacts, are very large.

When the output of the measured value of

the control zone, for example, downward, the signal from the meter 8 becomes smaller than the setpoint of the setpoint 9, and at the output of the comparison element 10 a signal appears

arriving at the input of the output actuator 11 Open. From the output of the element 11, the signal is fed to the input of the key element 22, the resistance of which decreases sharply. In addition, through

the element OR 13 and the disconnecting contact 19 of the intermediate relay 7 are energized by the relay 5 for the pause time. The time delay of the relay 5 is selected in such a way as to exclude the movement of the door leaves when

random disturbances of air flow, for example, when driving near a door, blasting, etc. Under the conditions of the ore mine, this exposure is 1–2 min.

If during the exposure time of the relay 5 the measured value returns to the control zone, then at the output of the reference element 10 the signal will disappear. the resistance of the key element 22 again becomes

very large and the relay is turned off 5 pause times.

If vozmushenie long, then after working out the exposure time, the relay 5 pause time closes its closing, closing

with time delay, contact 20 in the supply circuit of intermediate relay 7, which through closed contact 21 relays of time

operation will receive power and by its disconnecting contact 19 will turn off the pause time relay 5, and closing contact 16 will switch on the door opening relay 3 through the key element 22 with low resistance, Drive 1 door 2 through the closing contact 14 of the relay 3 opening and opening contact 29 of the relay L closing switch on opening. Simultaneously with switching on the intermediate relay 7, it will become its self-pickup by contact 17 and contact 18 will turn on the operation time relay 6, the time delay of the operation time relay 6 is selected depending on the required step size for the movement of the door wings 2, which is determined by the control accuracy requirement

Under the conditions of an ore mine, this time delay can be 1–2 s. The doors of the door 2 will move to the opening until the operating time of the relay 6 is working, after which it will disconnect the intermediate relay 7 and the opening 3 relay by its contact 21, which opens with a time delay. Actuator 1 shuts down and movement of the door leaves 2 ceases. If the doors of the door 2 have reached the extreme open position, then the limit switch 24 of the open position of the door is triggered and by means of the opening contact 26 it switches off the relay 3 of the opening.

When the intermediate relay 7 is disconnected, it closes its disconnecting contact 19 in the power supply circuit of the relay 5 pause time. If the measured value is not included in the control zone, then the resistance of the key element 22 remains small, the relay will receive power again for the pause time 5, and the control cycle will repeat.

The device operates similarly when the measured value leaves the control zone above. In this case, the resistance of the key element 23 decreases sharply (after the signal from the output of the actuating element 12 arrives at it), the relay 5 pauses, the intermediate relay 7 triggers, through the contact 16 the closing relay 4 and the drive 1 of the door 2 through the closing contact 15 and the break contact 28 begins to work in the direction of closing. When the extreme closed position is reached, the closing relay 4 is turned off by the contact 27 of the limit switch 25 of the closed position of the door.

In order to manually control the position of the door (for example, when checking the operability of the device), the switch 30 selects the desired direction of movement of the door. In this case, the relay 3 (4) contacts 14 (15)

turns on drive 1 of door 2. At the same time, contact 28 (29) prevents the passage of an opposite command to drive 1.

The Executive elements 11 and 12 can be performed, for example, in the form of power amplifiers, assembled according to the typical scheme. As key elements 22 and 23, for example, optotriacists can be used, while the LED in the optothyristor

0 is connected to the key control input,

The proposed device provides an increase in the accuracy of maintaining a given air flow rate, which makes it possible to reduce the flow rate of air supplied to the shaft by 2%, to reduce the number of door actuations by 5 times, which increases its service life and reduces the cost of its operation.

Claims (1)

Invention Formula 0Up to control mine a ventilation door consisting of a reversing door drive, the power supply of which includes closing contacts, respectively, of the opening and door closing relays, the limit switches of the open and closed position of the door, the sensor and the air flow meter connected to the reference element, the outputs which are connected to the entrances of the open and close executive elements, characterized in that, in order to increase the accuracy of maintaining a given air flow rate, reduce the energy consumption for regulation and increase Single sro5 door service by reducing the number of actuator actuations, it is provided with the relay operating time, the pause time relays, the intermediate relay, and the two key elements of the OR element. while in the chain 0 power supply of the door opening relay is connected in series opening contact of the limit switch of the open position of the door, the first key element, the closing contact of the intermediate relay and the opening contact of the operating time relay, in the power supply circuit of the door closing relay are connected in series the closing contact of the final switch of the closed position of the door, the second key element , 0 closing contact intermediate LE and disconnecting contact of the time relay, and the intermediate relay power supply circuit includes a disconnecting contact of the operating time relay and a closing contact of the pause time relay, parallel to which the closing relay of the intermediate relay is connected, and the outputs of the actuators Open and Close are connected respectively to control inputs first and 116967268 of the second key elements and with inputs to the power supply circuit of the operating time relay of the OR element, whose output is through the closing contact of the intermediate the contact of the intermediate relay is connected to the winding of the pause time relay,