SU1588674A1 - Method of protecting haulage rope of mine hoist from letting in and emergency stopping of guide frame of lifting vessel - Google Patents

Abstract

The invention relates to mine and mine lifting installations and can be used in automated elevator control systems to automatically stop when an emergency exceeds or decreases the speed of a vessel or guide frame. The purpose of the invention is to improve the reliability of the method of protection and safety of the lifting installation. The protection is carried out by comparing the control signals of the speed of winding the rope from the drum and the movement of the lifting vessel with the guide frame and issuing a signal to stop when they mismatch. At the same time, the vessel speed and rollers determine, exciting an acoustic wave of a given frequency in the area of the guide frame, take it in the pulley area, compare its frequency with the oscillation frequency of the reference oscillator, and determine the speed of movement of the vessel and the frame from the frequency difference. 1 il.

Description

The invention relates to mine and mine lifting installations and can be used in automated lift control systems for automatically stopping a lifting machine when an emergency exceeds or decreases the speed of the vessel or guide frame.

The purpose of the invention is to improve the reliability of the method of protection and safety of the lifting-installation.

In the drawing, the presentation is “1aa functional diagram of the device that implements the proposed method.

The device comprises an information shaping unit 1, electrically connected to the acoustic oscillation emitter 2, connected by a duct 3 to a hoisting cable 4 interacting with a guide pulley 5 acoustically connected to the acoustic oscillation receiver 6.

The output of the receiver of acoustic oscillations 6 is electrically connected to the input of the information processing and protection unit 7 containing interconnected reference generator 8, a mixer 9 of oscillations, to the inputs of which, the outputs of the receiver 6 of acoustic oscillations and reference generator 8 are connected. The output of mixer 9 is connected to the input an amplifier 10 of the Doppler frequency signal, the output of which is connected to the first input of the speed comparison unit 11; a second input of which is connected to the output of the travel speed sensor 12. The gauge 12 speed sensor communicates with the winding body 13 (drum) of the rope 4, to which a lifting vessel 14 is attached, which interacts with a guide frame 15 that is movably connected with guide ropes 16 placed in the shaft 17. At the bottom of the shaft 17 is placed shelves 18 with polosol

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A footprint 19 is mounted thereon. A track sensor 20 is connected to the footprint 19. The output of the speed comparison unit 11 is simultaneously the output of the information processing and protection unit connected to the control circuit of the elevating machine.

The device works as follows.

The electric oscillations of a given frequency / come from the information generation unit 1 to the emitter 2 installed above the object to be monitored (guide frame 15, lifting vessel 14) and converted by it into acoustic oscillations of the same frequency. Due to the presence of acoustic communication of the radiator 2, acoustic oscillations are excited in the latter through the supersonic conduit 3 with a lifting cable 4 and propagate along the cable 4 to the guide pulley 5. At the same time, the oscillation frequency f receives a Doppler increment Fd as the vessel 14 moves. 20

On the shaft of the guide pulley 5 of the lifting installation, a receiver 6 of acoustic oscillations is located. Acoustic oscillations received by receiver 6 are transformed by it into electrical oscillations with a frequency of l ± Fd and are fed via cable to the inlet 25 of the shaft lifting machine and automatic lifting vessel 14 or guide frame 15, which corresponds to the beginning of an arbitrary hanging of the guide frame 15 or cable 4 , the Doppler decreases the frequency Fd, as a result of which, by the speed comparison unit 7, a command is issued for the emergency stopping of the lifting sheet with the application of a safety brake. At the same time, the alarm is automatically activated.

In order to prevent the hoisting machine from stopping by the speed error signal when the guide frame 15 stops technological, a track sensor 20 is provided that interacts with the seat 19 on the shelf 18 and changes the mode of operation of the information generation unit 1, as a result of which it is formed and transmitted to the hoist control circuit signal to automatically lock the safety braking circuit.

Claims (1)

Claims of Invention A method of protection against inertia of the information processing and protection. The signal frequency f ± Fd, received from the hoisting rope, is fed to the input of the mixer 9, to the second input of which a signal is received stop the guide frame of the lifting vessel by comparing the control signals for the speed of winding the rope from the drum and the speed reference generator 8 with frequency. The mixture of moving the lifting vessel from the direction of the 30/1 i / nioii noA / lvnu n PKGPYiRY PPI THEY TYPE BUTTEREEL separates the Doppler frequency signal Fd (proportional to the speed of the object under test), which from its output goes to the amplifier 10 and then to the input of the comparison unit 11. The second input of the comparator unit 11 simultaneously receives a signal from the traveling speed sensor 12, which continuously records the winding speed of the hoisting rope 4 from the winding body 13 of the hoisting machine. 35 When a command mismatch is issued to activate the safety brake of the hoisting machine, characterized in that, in order to increase reliability and safety, the traction cable in the guide frame excites an acoustic wave of a given frequency in the direction of the guide pulley, compare the frequency of its oscillations with the oscillation frequency of the reference generator and determine the speed by the difference of these frequencies When a command mismatch is issued to activate the safety brake of the hoisting machine, characterized in that, in order to increase reliability and safety, the traction cable in the guide frame excites an acoustic wave of a given frequency in the direction of the guide pulley, compare the frequency of its oscillations with the oscillation frequency of the reference generator and determine the speed by the difference of these frequencies In case of mismatch of the operation mode .Q, the movement of the lifting vessel from the direction of the lifting machine with the speed of movement frame. Nata of a mine hoist installation and an automatic lifting vessel 14 or guide frame 15, which corresponds to the beginning of an arbitrary hanging of the guide frame 15 or rope 4, a decrease by the doppler frequency Fd occurs, as a result of which the speed comparison unit 7 commands the emergency shutdown of the lifting sheet with safety brake application. At the same time, the alarm is automatically activated. In order to prevent the hoisting machine from stopping by the speed error signal when the guide frame 15 stops technological, a track sensor 20 is provided that interacts with the seat 19 on the shelf 18 and changes the mode of operation of the information generation unit 1, as a result of which it is formed and transmitted to the hoist control circuit signal to automatically lock the safety braking circuit. and a mine hoist and avaFormula of the invention. A method for protecting the lifting frame of the lifting vessel from letting in the carriage stopping of the accidental stop, is carried out by comparing the control signals of the speed of winding the rope from the drum and the speed of the lifting vessel from the direction of the lifting vessel with the direction „i / nioii noA / lvnu n of the PKGPYaIr PPI THEIR CLAR When issuing a command to activate the safety brake of the hoist, when it is released, it is different in that, in order to increase reliability and safety, in a traction cable in the area of the guide frame, an acoustic wave of a given frequency is excited to receive this wave in the area of the guide pulley, compare the frequency of its oscillations with the oscillation frequency of the reference generator and determine the speed by the difference of these frequencies moving the lifting vessel with a guide frame. W Vseaprablena lifting machine R 18