SU1312043A1 - Device for protecting mine hoisting machine from overspeed - Google Patents

Abstract

The invention relates to mine hoisting devices and is intended to control the speed of a hoist at specific points in a mine. The purpose of the invention is to expand the range of monitored points. The device includes a sensor 1 of traveling pulses connected via a counter 12 and a switch 13 setting the middle of the path to a trigger 14, the inverse output signal of which is used to switch the counter 12 to the subtraction, and the direct signal goes to one of the inputs of the EXCLUSIVE OR 15 allowing to control the speed at the retardation site. In case of exceeding the speed in the section of equally slow motion, the readings of the counter 6 pulses of a given path segment and the counter 7 pulses of the current path segment are compared before the signal disappears at the inverse output of the time interval adjuster 9. i (l with go

Description

1312043

associated with the output of the element 8 is a comparison through the element OR 4 of the execution, which causes the appearance of a signaling authority .5 in the chain of the drive of the lift at the output of the element 11 and the switching on machine. 1 il.

one

The invention relates to mine lifting installations and can be used to control the actual speed of a hoist relative to a given speed.

The aim of the invention is to increase reliability by expanding the range of monitored tachogram set points.

The drawing shows a functional diagram of the device.

The device for protection against overspeeding of a mine hoist includes a sensor 1 for traveling pulses, which generates a pulse when a lifting vessel passes a single path segment, the output of which is connected to the inputs of the maximum speed control unit 2 and the deceleration speed control unit 3, output through the OR element 4 is connected to the executive body 5.

The slowdown speed control unit 3 contains a pulse counter 6 of a predetermined distance and a pulse counter 7 of the current distance, a comparison element 8, a time interval setting 9, a delay element 10 and an AND 11 element, the output of which is the output of the slowdown speed control 3, as well as the counter 12 of track pulses, the switch 13 sets the middle of the path, the trigger 14 fixing the middle of the path, the element EXCLUSIVE OR 15 allowing to control the speed in the deceleration section, the block 16 determining the direction of motion. Setting the trigger to its original state is carried out by the sensor 17 exact stop.

The device works as follows.

Before the movement of the lifting vessel, the stop sensor I7 sets the counter 12 and the trigger 14 to the initial

five

0

five

0

five

0

five

position. The counter 7 pulses of the current path segment is in the zero state. At the output of the comparison element 8, there is a signal which, through the delay element 10, is fed to the input of the pulse counter 6 of a predetermined path segment and the setup input of the time setting unit 9. A unit is recorded in a counter 6 of a predetermined path length. When the lifting vessel moves, the signals from the sensor 1 of the traveling pulses arrive at the counting input of the counter 7. One is recorded in the counters 12 and 7.

When the readings of the counters 6 and 7 coincide, the element 8 through the delay element 10 generates a signal arriving at the counting input of the counter 6, the installation input of the counter 7 and the installation input of the setpoint 9 of the time interval. In the counter 6, the number two is written, the counter 7 is set to the zero state. After the reference time has elapsed, the setting device 9 stops working until a signal appears at the output of the comparison element B. After two pulses have been received, the number two is recorded in counter 7. When comparing the readings of the counters 6 and 7, the signal from the comparison element 8 records the number three in the counter 6, the counter 7 with this signal is set to its original position. The counter 12 records the number corresponding to the middle of the path of movement of the lifting vessel. When reaching the middle of the path, the counter I2 generates a signal through the switch 13 to the digital input of the trigger 14, which inverse output switches to the subtraction of the counter 12.

At the same time, the signal from the inverse output of the element 15 enables the operation of the element 11. In the process of operation, the number recorded in the counter 12 and the counter 6 decreases to zero. AT

if the speed of the lifting vessel is exceeded in the area of equi-slow motion, the counters are shown 6. and 7 are compared before the signal at the inverted output of the setter 9 disappears. This causes the appearance of the signal at the output of the element II, which through the element OR 4 turns on the actuator 5. In the case of using the speed limiter on a multi-horizontal lift with the switch 13 selects the middle of the path of a given horizon.

The maximum speed is monitored by block 2, which counts track pulses during the control time interval. If the number of pulses in the control time interval exceeds the specified value, the maximum speed control unit generates a signal that, through the element OR 4, turns on the actuator.

Claims (1)

Invention Formula A device for protection against the speed of a shaft hoist, containing an actuator in the drive chain of the machine, connected through the OR element and the maximum speed control unit with the track output Compiled by I. Korneva Editor And, Shulla Tehred L.Olninyk Cor Pod 1930/21 Circulation 721 VNIIPI USSR State Committee for inventions and discoveries 113035, Moscow, Zh-35, Raushsk nab., 4/5 Production and printing company, Uzhgorod, st. Project, 4 pulses connected to one of the outputs of the control unit, deceleration speed, including a track pulse counter, a trigger, an EXCLUSIVE OR element, a pulse counter of a given and current path segments, connected by outputs to the inputs of a comparison element with an output delay element, time interval adjuster, logical element And, the output of which is the output of the block and is connected to another input of the OR element, and the first and second inputs are connected respectively to the outputs of the comparison element and the time interval master, the block op of determining the direction of movement and the sensor for the precise stopping of the vessel, about the fact that, with the With increased reliability by expanding the range of controlled points, it is equipped with a reference switch: neither the middle of the path through which the output of the track pulse counter is connected to the trigger input, the zero input of which is combined with the track pulse counter input and the first input of the EXCLUSIVE OR OR element, the second input of which is connected to the output of the block for determining the direction of motion, and the inverse output to the third input of the element I. Proofreader M. Demchik Subscription