SU750064A1 - Apparatus for remote control of mine face conveyer - Google Patents

Description

(54) DEVICE FOR REMOTE CONTROL OF THE BETTING CONVEYOR

one

The invention relates to devices for remote control of drives of mining machines, B particular, downhole conveyors.

A control device is known, such as a downhole conveyor, comprising a stabilized power source, a multi-position switch, a control relay, a high-frequency generator, communication lines, control panels, including start and stop buttons, and end diodes, and resistors, capacitors 1.

This device does not comply with safety requirements when controlling the conveyor from two or more points.

It is also known a device for remote control of a downhole conveyor, comprising a stabilized power source with output windings and a rectifier, a multi-position switch, a control relay — interlocking by the number of control panels, an enable enable relay, communication lines, control panels, including stop start buttons, end diodes and resistors and capacitors 2.

The known device does not provide self-control of the health of the elements, which reduces the reliability and safety of its operation.

The purpose of the invention is to increase the reliability and safety of operation.

This is achieved by the fact that the device is equipped with relay elements with rectifying bridges according to the number of control consoles and a high-frequency generator, the corresponding outputs of which are connected to communication lines to which rectifying bridges with relay elements are connected through capacitors, the closing contacts of which are connected in parallel with the buttons start-up, the high-frequency generator is connected to the rectifier of the stabilized power supply through the closing contact of the enable enable relay and connected in parallel control relay short-circuit contacts.

The drawing shows the electrical circuit of the device.

Claims (3)

The device contains a control unit 1, which includes a stabilized power source 2, a rectifier 3, a control relay - interlocking 4, 5, 6, a multi-position switch 7 for three or more directions, a switch for enabling the conveyor 8, the winding of which is bridged by a capacitor 9 and the generator 10 high-frequency output transformer 11. The output windings 12, 13, 14 of the transformer 11 through separation capacitors 15, 16, 17 are connected respectively to the communication lines 18, 19, 20. Reeistors 21, 22, 23 are designed to limit the current output one winding 24, 25, 26 power supply 2. The control unit is connected to the control panels of the combine 27 of the upper and lower heads of the conveyor, respectively 28, 29, through separate communication lines 18, 19, 20. In each control panel there are stop buttons 30, start 31, separation capacitor 32, rectifier bridge with diodes 33, relay element 34, smoothing capacitors 35, 36, terminal relay 37, terminal diode 38 and diode 39 in relay circuit 37. Parallel contacts to start button 31 include closing contacts 40, 41 respectively of relay 37 and 34. In the control device 1 make contact 42, 43, 44 relay p Permissions incorporation 8 connected in series with the multi-contact switch 7 in its respective position. Parallel to these contacts, the closing contacts 45, 46, 47 of the lock control relay 6, 4 and 5 are connected respectively. The enable enable relay 8 is connected to the rectifier 3 via the breaking contacts 48, 49, 50, and the generator 10 through the closing contacts 51, 52, 53 , connected in parallel, and 54 control relays - interlocks 4, 5, 6, and enable enable relays 8. Contacts 55, 56, 57 control relays - interlocks 4, 5, 6 are included in the bottomhole conveyor control circuit. The device works as follows. If power is supplied, control locks 4-6 are disconnected, and the enable enable relay 8 is powered by rectifier 3 via disconnecting contacts 48-50. Contacts 55-57, connected in series, break the conveyor drive control circuit. By moving the switch 7 to the first position, the remote control 27 is selected as the control, and 28, 29 - the interlock. The generator 10 does not produce a high frequency voltage since it does not receive power from the rectifier. 3. "At the indicated position of the switch 7, the relays 5, 6 are blocking and disconnected from the corresponding communication lines 19, 20. Therefore, they cannot be turned on from the blocking points 28, 29. To turn on the conveyors, it is enough to close the start button 31 and the console 27. When This turns on relays 4 and 37, since contact 40 of the relay for enabling the conveyor 8 is closed and contact 38 is bridged by button 31. After releasing the start button 31 of relay 8, it remains for some time switched on by the discharge of capacitor 9 through the winding of this relay. The generator 10 receives power through the closed contact 51 of the relay 4 and the contact 54 of the relay 8. From the outputs of the generator 10, a high frequency signal is supplied to the communication lines 19, 20. Further operation of the device can be considered using the open control panel as an example. The frequency is rectified by rectifier 33, thereby switching on the relay element 34, which by its contact 41 bridges the button 31. The relay 37 triggers the button 31 with its contact 40 and connects the end diode 38. In this case, the closed contact 46 p Just 4, the lockout control relay 5 is turned on. In addition, the relay 37 turns on and is blocked by its contact 40. The lockout control relay 6 is turned on in the same way, but through the closed contact 47 of the relay 5. Relay 4-6 are mutually interlocked. Turning off any one of them will turn off each one. After switching off the relay 8, power is removed from the generator 10, which leads to the disconnection of all relay elements 34. When the circuit is opened with button 30, for example, remote control 27, relay 37 of this remote control and control relay - interlock 5 are disconnected. conveyor and 47-in the circuit of the winding of the control-blocking relay 6. Contact this relay 45, open, disconnects the control-lock-4 relay of the first control channel. In this case, the end relays 37 of the respective consoles are simultaneously disconnected. As a result of switching off the relay 4-6, relay 8 is automatically triggered, preparing the circuit for switching the conveyor on again. The device provides zero protection and protection against loss of controllability in the event of a link failure. Breakage of any wire is equivalent to the impact on button 30. A similar result is caused by a short circuit of the communication line. Malfunction of generator 10 or relay 8 does not lead to self-switching of the device, but on the contrary, imposes a ban on turning on the conveyor. When the relay 4-6 is working through the relay element 34 does not pass the current, as the separation capacitors 32 sharply limit the current through them of the power frequency. Claims An apparatus for remote control of a downhole conveyor comprising a stabilized power source with an output