SU245710A1 - TELEMECHANICS SYSTEM FOR MANAGING THE MOVEMENT OF THE MINE HYDROHELECTION SECTION - Google Patents

Description

The proposal relates to the field of telemechanics, mining engineering and computer technology.

A known telemechanic system for controlling the movement of sections of the shaft hydraulic support, comprising section position sensors connected to an input device of the system, electrohydraulic valves, pulse distributor, decoder connected via switches to the input device of the normal and emergency state, counters, logic circuits , pulse generators, synchronization and control devices.

The proposed system is characterized in that the pulse distributor, each cell of which is connected to electrohydrocan. M, is connected to a clock-pulse amplifier connected to the counter, to a start-stop synchronization device connected to the counter, and to a pulse generator, and to the cell start, also connected to a counter, which is connected via a decoder to a display unit of the number of the moving section and to a coincidence circuit, another input of which is connected to a counter that stores information when The power supply and the output are connected to the generator control device, to the input device and to the pulse generator start device, which is also connected to the input device.

The control unit of the pulse generator is also connected to a lag counter connected to the combine position sensor and to the time control unit, which

the input is connected with a pulse generator start-up device, one of the outputs is connected with a control device of the impulse generator, and the other output is connected with a counter that stores information during a break in the thread, which is connected to a time relay connected to the pulse generator start-up device.

This provides a simplified system and lower power consumption.

The drawing shows the scheme of the described system.

It contains an indicator of the state of the support section, located in the slide 1, an indication of the emergency state

the support sections 2, the input device 3j, the display unit number 4 (section) support support, located in the shifter, the decoder 5, the counter 6, the coincidence circuit 7, the counter 8, which stores information during power interruptions, the trigger device 9 of the pulse generator, the time master control W, control device 11 pulse generator, time relay 12, counter 13 of the lag of the moving section of the support from the combine,

shaper-amplifier clock pulses P, sensors 18 position lining sections, distributor 19 pulses, electro-valves 20, mode switch 21 (a - "demand, b -" transfer), signal type switch 22 and location sensor) of the DXSystem combine as follows .

When the supply voltage is applied, the pulse generator 14 and the time control unit 10 are started, and the start cell - / 6 prepares the first cells of the distributor 19, the counter 6 and the counter 8, which stores information during power interruptions. The signals of the pulse generator 14 are fed to the input of the clock-pulse amplifier P, where they acquire the parameters and the form determined by the selected distributor circuit and load. As the clock pulses in the i9 distributor and the & signal shift occurs. A certain period of time corresponds to the choice of a particular object. Signals through sensors 18, characterizing the state of the object, go through signaling buses I, P and 111 to input device 3. From the output of the latter, signals from the front position sensors of the lining section (jack retracted, section shifted to the co-funnel) are fed to the input of the launcher 9 the pulse generator, and through the switch of the signal type 22 - to the decoder 5. In addition, from the input device 3 at different times, the signals come to the support section state indication device located in shifter 1 and the emergency signal indication device This is either of the lining sections 2. The emergency conditions in the automation systems of the coal-mining complexes are usually taken by the non-dispute of two close-standing sections, the landing on a hard one, etc.

The monitoring time of the support sections should be longer than the spreading time and, for convenience, receiving signals from the time setting monitor 10 is determined by the number of polling cycles required to provide the specified time delay and to obtain reliable information. As the signals from counter 6 and counter 8, which stores information during power interruptions, coincide, from the output of the coincidence circuit 7, the signal arrives at the input of starter 9 of the pulse generator. During synchronous operation of the distributor 19 and the counter 6, the signals from the input device 3 and the coincidence circuit 7 arrive at the same clock cycles, and an advance pulse periodically arrives at the input of the time monitor of the control 10. First counter cells & and 8, as well as the distributor 19, are starting and are not intended for the selection of lining sections. The start cell of the distributor 19 is connected to the alarm signaling directly (without sensors) through the isolating diodes. This allows, if necessary, to control the communication link from the control point to the control objects. A similar cell can be located on the last support section and then it will monitor the communication line in the area from the first to the last object. After several cycles of control from the time control unit 10, the signal arrives at the counter 8, preparing the choice of the next cell, or controlling another object, and after another control cycle, the control unit generates a signal to the control unit 11 by the pulse generator. The last device stops the pulse generator 14 at the moment of arrival of signals from the coincidence circuit 7 and the setter, provided that the movable section of the support is sufficiently removed from the combine controlled by the counter 13, and in the position "shifting mode selector 21. If the combine is not sufficiently removed and prevents the support from moving, the counter 13

It prohibits the signal from both the output of the control unit // to the pulse generator 14 and the output of the starting device 9. The monitoring mode continues until the combine is removed for a given distance. The pulse generator 14 stops when the position of the excited cell of the distributor 19 corresponds to the position of the gate 8. The cyclic tele-alarm mode causes the use of the distributor of contactless elements with the memory property as the main switching elements. Structurally, the distributor is made so that the elements of choice, for example, a semiconductor trigger or a tirisgor, are elements that directly commute the current in the electrohydraulic circuit, i.e. the electrohydraulic valve is part of the load in the distributor cell. The second, significantly smaller, part of the load is the signaling and preparation chains of the next cell. The signaling and preparation circuits of the next cell are inertialess, and the electrohydraulic valve has both electromagnetic (due to winding inductance) and hydromechanical inertia. Obviously, by appropriately selecting the frequency of the pulse generator, it is possible to provide a shift in the signal in the distributor, in which the energy during one cycle will not be enough to trigger the electrohydraulic valve.

When the pulse generator 14 is inhibited, the distributor 19 and the counter 6 stop at the selected object. A current will flow through the electro-valve during the time of moving the support section. The section is unloaded from the pressure, loses spreading and is pulled to the conveyor. The section state is displayed on the operator’s console using

pulse torus 14 generates oscillations with a predetermined frequency, providing a mode of control of all sections. The electro-hydraulic valve is turned off, and when the current is de-energized, thrust occurs. If during the allotted time the section does not come to the front position, as evidenced by the absence of a signal from the corresponding sensor, the signal to the input of the starting device 9 will be issued by the bypass device of this section, representing time relay 12, triggered by the counter 8.

When the conveyor is moved, the mode switch 2J is set to the "interrogation" position, the impulse generator 14 is disabled, and the signal type switch is set to the "rear" position. The signals are fed to the input of de-baffle 5, the numbers of the polled sections are set by the counter 6, and on the device 4 the status of the section jacks is displayed. Similarly, alarm messages are decrypted. To prevent the accumulation of errors in the desynchronization of the counter and distributor, a start-stop signaling device is used, which in the first clock cycle sends a sync pulse to the clock pulse amplifier 17 and the counter 6, relieving the short-time supply voltage from the counter 6 and the distributor 19.

In addition, the start-stop signaling device in the polling mode delays the next monitoring cycle by the time required for the operator to perceive the decrypted messages.

Subject invention

Telemechanics system for controlling the movement of the hydraulic support sections sections, containing section position sensors connected to the input device of the system, electro-valves, pulse distributor, decoder connected through a switch

telephones to the input device associated with the normal and emergency state indication device, counters, logic circuits, pulse generators, synchronization and control devices, characterized in that

for the sake of simplicity, a pulse distributor, each cell of which is connected to an electro-hydraulic valve, is connected to a clock-forming amplifier, connected to a counter, to a start-stop synchronization device connected to the counter, and to a pulse generator, and to a trigger cell, also connected to a counter, which connected via a decoder to a moving number display device

section and to the coincidence circuit, another input of which is connected with a counter that stores information during power interruptions, and the output is connected to the generator control device, to the input device and to the device

triggering a pulse generator, also associated with an input device; the control device of the pulse generator is also connected to a lag counter connected to the combine position sensor and to the setpoint generator

control time, which is connected to the pulse generator start-up device, via one of the outputs — to the control unit — or to the pulse generator, and via another output — to a counter that stores information during power interruptions, which is connected to a time relay connected to the device start the pulse generator.

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