SU1552086A1 - Apparatus for automatic inspection of wear of steel ropes of mine hoists - Google Patents

Abstract

The invention relates to devices for the automatic monitoring of wear and rejection of rope sections of mine hoisting machines and can be used to diagnose the state of steel ropes. The aim of the invention is to expand the functionality of the device by determining the location of the defect along the length of the rope. During operation of the device, the loss of the cross section of the rope 1 operated in an explosive atmosphere is measured by means of an electromagnetic converter 2. The result is memorized using an electrical memory - an operational storage unit 11, and in an explosion-proof environment by means of an information processing unit 19 connected to an information unit 18. A recorded result is extracted from the memory, which is displayed in the display and recording unit 13. Analyze the results obtained and, if necessary, cull sections of rope 1 along its length. 2 Il.

Description

The invention relates to automatic wear control devices, and rejection of rope sections of mine hoisting machines and can be used to diagnose the state of steel ropes.

The aim of the invention is to extend the functionality by determining the location of the defect along the length of the rope.

FIG. 1 shows the installation of an electromagnetic transducer measuring the cross section of the rope and the track sensor; in fig. 2 - shows a functional diagram of the device.

The device comprises an electromagnetic transducer 2 measuring the cross section of the rope 1 mounted on a rope 1, a generator 3, the output of which is connected via a bridge circuit to the drive coils 4 and 5 of the converter 2, an amplifier 6 connected to the output of the bridge circuit, a path sensor 7 connected in series with a functional converter 8, the input connected to the output of the amplifier 6, the integrator 9 with a reset, analog-to-digital converter 10, the operational storage unit I1, the p-threshold comparator 12, the display unit 13 and

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ate

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pei isstration, and serially connected generator 14 clock impuses, counter 15, control key 16, the second input of which is connected to the output of the n-threshold comparator 12, and output to the control input of the display and recording unit 13, binary ring counter 17 The output of which is connected to the second input of the operational storage unit 11. The output of the generator 14 of clock pulses is connected to the input of the binary ring counter 17 and the third input of the operational storage unit 11, and the output of the sensor 7 of the path is connected to the control input of the integration torus 9 with a reset, analog-to-digital converter 10 and the second input of the binary-ring counter 17.

In the device, an electromagnetic converter 2, a generator 3, an amplifier 6, a functional converter 8, a sensor 7, an integrator 9 with a reset, an analog-digital converter 10, an operational storage unit 11 and a binary ring counter 17 are integrated into a single information node 18, which can be installed in an explosive environment. The p-threshold comparator 12, the display and recording unit 13, the clock pulse generator 14, the counter 15 and the control key 16 form the information processing unit 19, which is installed in an explosion-proof environment. The device works as follows.

The electromagnetic converter 2 measuring the cross section of the rope 1 converts the cross section of the section of the rope 1 contacting the converter 2 into a proportional to the cross section signal at the output of the bridge circuit. In this case, in the initial state, the bridge-powered generator 3 with the converter 2 installed in the unworn test section of the rope 1 is balanced. When converting transducer 2 to the section of control cable 1 with a known artificial defect, an unbalance signal appears at the output of the bridge circuit, which is amplified by amplifier 6 with an adjustable gain factor, changing the value of which calibrates the device. When translating transducer 2 to a controlled rope 1 with a reduced cross section, inductance

d 5 0

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Q 45 CQ. five

The excitation coils 4 and 5 of converter 2 decrease, the bridge circuit goes out of balance, and a signal depending on the loss of cross section appears at its output. This signal is amplified by amplifier 6.

The analog signal U about the cross section of the rope formed at the output of amplifier 6 depends on the cross section for the parabolic dependence U a + b s + / j

+ with s. This signal in the functional converter 8 undergoes such a change that at its output a signal Uj is generated, directly proportional to the cross section of the rope 1 according to the linear equation U d + e s, and is fed to the input of the integrator 9 with a reset, which averages the amount of wear during the lay-up step rope 1. The signal of the twist pitch comes from the sensor 7 of the path that controls the operation of the analog-digital converter 10 and the binary ring counter 17.

The signal of wear at the twist step from the integrator 9 with a reset enters the analog input of the analog-digital converter 10 and enters the operational storage unit 11 as a binary code, at the same time the address code arrives at block 11 from the binary ring counter 17. In the absence of a signal from the generator 14 clock pulses at the input Write - read the operational storage unit 11 records information

This is done as follows.

The signal U from the output of the functional converter 8 is fed to the input of the integrator 9 with a reset, where the signal U is integrated (summed) for a time while in front of the electromagnetic converter 2 passes a section of the 1, equal to the twist of its twist. So that at any speed of movement of the rope 1 in front of the electromagnetic transducer 2, the integrator 9 summarizes the signal U in the interval of the stride 1 pitch. A path sensor 7 is attached to the rope 1. Sensor output

7th way a pulse appears after a section of rope passes in front of it.

1, the length of which is equal to the twist pitch (the number of pulses generated at the output of the winding pitch in front of the sensor 7).

When a pulse arrives from the sensor 7 of the path to the zeroing input of the integrator 9 with a reset and to the control input of the analog-digital converter 10, the following occurs. Be the guise of U. j U, (t) dt, is equal to pro ± i summed over time from t (to t

ten

It is called after the information node 18 is removed from the explosive atmosphere and moved into an anti-explosion environment and connected to the information node 18 of the processing unit 19. At the end of the measurement and recording of the wear information of the monitored rope 1, the information node 18 is moved to the explosion-proof environment where it is connected to the processing node 19. By the generator signal, 14 clock pulses put the block 11 into the Read mode. Simultaneously through the duo-bell

the signal U4 (t) (during the passage time in front of the sensor 7 of the path of the cut of rope 1 with a length equal to the twist pitch) is fed to the input of the analog-digital converter 10, the contents of the integrator 15 counter 17 are given to the block 11, the code of the administrator 9 is reset on rez, as a result, from the output of block 1 to the input of the n-threshold comparator 12, a signal about wear is received in succession at the lay step.

20

O, analog-to-digital converter 10 converts U. into digital code U,

the binary ring counter I7 registers a pulse from the output of the sensor 7 of the path and generates 1 at its first output (output of the first bit), under the action of which a single 25 U signal is sent to the first address input of the operational storage unit 11 first cell of memory. With further passage in front of the electromagnetic transducer 2 and in front of the sensor 7, the path of the second section of the rope 1 (also 30 times the length equal to the twist of the rope), the described operations occur similarly: at the output of the integrator 9

In the n-threshold comparator 12, the wear signal is analyzed by levels, and the display and recording unit 13 receives information on the level of wear through one channel, and through the other channel, through the counter 15 and the controlled key 16, the address (coordinate) information wear on a real rope 1.

Claims (1)

Invention Formula The device for automatic control of the wear of steel ropes of mine hoisting machines, containing a signal U | installed with a reset in time from t to t - $ fort; U ((t) dt, stepping on the input of the converter 10 the contents of integrator 9 is reset to O, converter 10 converts III into digital code 1) 1, counter 17 registers a second pulse from sensor 7 and generates 1 at its second output (output of the second bit) 1, under the action of which the second address input of block 11 is fed single signal. The latter writes the code in the second cell of the memory. Thus, in the successive cells of the memory of the operational storage unit 11, the codes Ei, U3, U 5, ... are recorded. , U j, each of which is a unique measure of the average gg level converter, random access memory, n-threshold clock and display and recording unit connected in series by a clock generator, counting the cross section of the rope 1 on one step of his lay. Recorded in serial by its key, controlled by the key, the second memory cell is operatively memorized, the input of which is connected to the output of the threshold comparator, and the output - to the control input of the display unit and block 11, the information characterizes the distribution of the degree of wear of the rope 1 along its length and can be used registration, as well as binary-ring 0 It is called after the information node 18 is removed from the explosive atmosphere and moved into an anti-explosion environment and connected to the information node 18 of the processing unit 19. At the end of the measurement and recording of the wear information of the monitored rope 1, the information node 18 is moved to the explosion-proof environment where it is connected to the processing node 19. The generator signal 14 clock pulses ne5, the counter 17 generates an address code to block 11, resulting in a signal from the output of block 1 to the input of the n-threshold comparator 12 a signal about wear at the stride step. unit 11 is switched to read mode. Simultaneously through the duo-bell the counter 17 is given to block 11 an address code, - as a result, from the output of block 1 to the input of the n-threshold comparator 12 a wear signal is received sequentially at the lay step. In the n-threshold comparator 12, the wear signal is analyzed by levels, and the display and recording unit 13 receives information on the level of wear through one channel, and through the other channel, through the counter 15 and the controlled key 16, the address (coordinate) information wear on a real rope 1. Invention Formula A device for automatic monitoring of the wear of steel ropes of mine hoisting machines, containing an electromagnetic transducer measuring a cable section mounted on a rope, a generator, the output of which is connected via a bridge circuit to the exciter coils of the converter, and An amplifier coupled to the output of the bridge circuit, characterized in that, in order to extend the functionality by determining the location of the defect by the length of the rope, it is equipped with a path sensor connected in series by a functional converter, an input connected to an amplifier output, an integrator with a reset, an analog-to-digital converter, a random access memory, an n-threshold comparator and a display and recording unit, sequentially connected by a clock pulse generator, a counter , controlled key, the second input of which is connected to the output of the pre-registration, as well as a binary-ring counter, the output of which is connected to the second input of the operational-backup The repeating unit, the output of the clock generator are connected to the input of the binary ring counter and the third input of the operational storage unit, and the output of the sensor of the path is connected to the control input of the integrator with a reset, analog-digital converter and the second input of the binary ring counter. / V //// //// A