SU1158471A2 - Standard speed shaper for protection arrangements of mine hoists - Google Patents

Abstract

FORMER OF REFERENCE; SPEEDS FOR PROTECTION DEVICES OF MINE OF SHAHTJHBIX LIFTING INSTALLATIONS by author. St. 844533 is distinguished by the fact that, in order to increase reliability in operation, it is equipped with an analog adder, a limiting unit and a speed mode adjuster, with one input of the analog adder connected to the output of the function converter, and the other input to the output of the limiting unit, one of the inputs of which is connected to the output of the analog adder connected to one of the inputs of the comparison unit, and the other inputs of the 6noka limiting are connected to the outputs of the speed control sensor. SP 00 1

Description

The invention relates to lifting equipment and can be used in GaAs protection devices. lifting installations from exceeding the permissible values of the speed of movement.

The purpose of the invention is reliability.

The drawing shows the functional diagram of the device.

The device contains a pulsed displacement sensor 1, the addition and subtraction inputs (counting inputs) of the reversible counter 7 are connected to the output of the control unit that controls the direction of movement of the bus 2, 3 and 6, controlled by the node 2 and the reversing counter 8 (the counter Above), and through guided by analyzing unit 9, gains 10 and 11 are inputs of a reversible counter 12. From the outputs of node 2, buses 6–6 of counters 7 and 8 receive commands Forward and Back, respectively.

The outputs of counters 7 and 8 are connected to the input of equality comparison units 13 and 14, the outputs of which, together with the outputs of counters 7 and 8 and the output of the displacement direction node 2, are connected to the inputs of the analyzing unit 9.

The output of counter 12 is connected to a circuit consisting of a series-connected voltage-to-voltage converter and a functional converter 16 (executed on the operational amplifier of the analog adder 17 with the feedback limiting block 8 (on the operational amplifier). The limit level is determined by the value of the specified speed and control from the setpoint speed 19. The output of the analog adder 17 is connected in the circuit of the speed limiters to the block 20 comparison, the second input of which is connected to the output of the speed sensor 21

Shaper etaloshuyu speed works as follows.

In the case when it is necessary to move the lifting vessel in the Forward direction (the load is lifted from the lower horizon to the upper one), the lifting is first carried out in the mode of operation with the maximum permissible speed, and then in the mode of operation with a speed lower than the maximum permissible. If there is a command to move forward (the lifting vessel is on the sensor of the exact stopping of the lower horizon, counter 7 is zeroed out and a number equal in scale of pulses to the distance between the extreme points of the barrel is entered in counter 8; Pulses from the pulse sensor: 1 travels along bus 3 to the input of the counter 7, and bus 6 to the reading input of the counter 8. Due to this, counter 7 is prepared for addition, and counter 8 to receive the incoming pulses. In the back mode, the picture will be reversed.

Such a meter switching circuit makes it possible at the current time to have two results of testing a given movement. When moving forward, on the counter 7, the distance covered is recorded, on the counter 8 remaining.

The readings of the counters: 7 and 8 are analyzed using equality blocks 13 and 14 for equality, the second inputs of which the quantity enters in the digital code is equal to the distance required to accelerate the lifting vessel to the maximum speed. With the equality of the codes at the outputs of blocks 13 and 14 of the comparison, the output signals that are fed to the inputs of block 9, made, for example, on the basis of an automaton Mzf.

The analyzing block 9, in accordance with its own algorithm and the values of the signals at the inputs, produces at its outputs signals indicating that the lifting vessel is in a particular zone of the trunk.

Block 9 also generates the Add and Subtract commands that result from the testing of the system of Boolean functions of the input signals obtained at the corresponding outputs of block 9.

These commands are sent to shia 0 and 11, which connect the inputs of the addition or subtraction of a reversible counter 1 2 with the pulse displacement sensor 1.

When the car is started from the lower horizon in the Forward direction, the counter 7 is reset and a signal from the output enters the input of block 9, which generates signals at the corresponding outputs that allow the pulse from sensor 1 to pass through bus 10 to the addition input of counter 12, which will perform the operation adding the incoming pulses, i.e. record the distance traveled by the lifting vessel during the acceleration period. The capacity of the counter 12 is chosen equal to the displacement of the vessel during acceleration to the maximum speed. Information in digital form at the outputs of counter 12 is converted by the converter 15 into an analog form and fed to the input of a functional converter 16 implementing: a protective speed diagram as a function of the path for the operation mode with the maximum allowable speed of movement, From the output of the converter 16 the signal is fed to the input of the analog adder 17, in the feedback of which the block 18 is turned on, the limitation of which is equal to kyino in the mode of operation with the maximum permissible speed, i.e. the voltage on the output of summitor 17 repeats the input. The voltage from the output of the adder 17 is fed to the input of block 20, to the second input of which a signal is sent from the speed sensor 21. When exceeding relative to the allowable speed, the block 20 generates an emergency signal for further development by the automatic control system and drive of the lifting machine. As indicated above, in one of the inputs of blocks 13 and 14 for equality, in a digital code, a number equal to the distance required to accelerate the lifting vessel to the maximum speed is received. The other inputs of these blocks receive the readings of counters 7 and 8. The moment of equality of the readings of counter 7 with the specified number at the output of block 13, a signal is generated; At the same time, the signal that allows the counter 12 to move the pulses to the input of the bus 10 stops the signal. When the counter 8 reading the remaining distance becomes equal to the number on block 14, the last point It watches the signal with the arrival of which block 9 will generate a signal at another output, indicating the vessel moves to the deceleration zone near the upper horizon, and, accordingly, the signal at the third output, allowing the passage of signals from the pulse sensor 1 to the subtraction input of the counter 12. its output as it approaches. The upper horizon will decrease. Accordingly, its analog value will decrease. At the output of the converter 15, the code is the voltage and the voltage value at the output of the converter 16 fed to the input of the adder 17, the output of which will decrease the value of the allowable speed. With the arrival of the vessel on the sensor of the exact stop of the upper horizon, the counter 8 is zeroed and generates a signal in block 9, and in the counter 7 a number equal to the distance between the outermost horizons is recorded. Thus, the device is ready for subsequent movement between horizons in the Back direction. In this case, the counter 8 records the distance traveled, and the counter 7 records the remaining distance. In the mode of operation with the speed of the short-range, less than the maximum allowable, the pa6oTaet driver is the same as in the operation mode with the maximum permissible speed (only difference in the operation of the adder 17). The output from sensor 1 9 receives a signal that determines the level of the speed limit for this mode of operation (as opposed to the mode of operation with the maximum allowable speed when the limitation level is zero). When moving the lifting vessel, the Propulsion Forward as it accelerates at the input of the adder 17j, the downward slope from the output of the converter 16 ,. increases, and the output voltage repeats the input voltage only up to the wavelength, defined by the node, limiting the band. The further increase in the input voltage does not lead to the age of the output voltage. When the lifting vessel goes into the braking zone, the tension at the output of the transducer 16 decreases, and at the output of the adder 17 ® it remains unchanged until the moment of time until its input voltage is

51158471,

will be less than the value defined e-repeat input. Thus the odds

My unit is 18, and only after this is the protective diagram for this output voltage reduced, the operating mode is reduced.

Claims (1)

REFERENCE FORMER; SPEEDS FOR SHAFT PROTECTION DEVICES / NEW LIFTING INSTALLATIONS by ed. No. 844533, distinguished by the fact that, in order to increase reliability in operation, it is equipped with an analog adder, a limiting unit and a speed mode controller, moreover, one input of the analog totalizer is connected to the output of the functional converter, and the other input is to the output of the limiting unit, one of the inputs of which is connected to the output of an analog adder connected to one of the inputs of the comparison unit, and the other inputs of the limiting unit are connected to the outputs of the speed mode setter. <. „SU„ 1158471 1158471 2