SU1528716A1 - Method of checking cage movement in shaft and device for effecting same - Google Patents

Abstract

The invention relates to mine raising and may find application in similar transport equipment. The purpose of the invention is to increase the reliability of monitoring the condition of guide conductors (NP). In the lifting vessel (PS) 4 in mutually perpendicular directions, the respective first vibration amplitudes of the PS 4 are measured as dynamic loads using the respective vibration sensors (PD) 5. In addition, the location of the PS 4 at the same time is determined corresponding sensor 14 mine. Vibration signals from HP 5, converted into electrical signals, are transmitted by transmitter 6 along hoisting rope 7, received by receiver 2, and recorded in recording unit 3, and signals from HP 5 are recorded depending on the position of PS 4. The status of NP 15 is judged by the magnitudes of the first amplitude and its phase of the first harmonic of the PS 4 vibrations from impacts on NP 15 and their changes during the operation of mine hoisting installations. 2 sec. f-ly, 5 ill.

Description

This invention relates to mine raising and can be used in similar transport equipment.

The purpose of the invention is to increase the reliability of monitoring the condition of the guide conductors.

FIG. 1 shows a block diagram of an apparatus for carrying out a method for monitoring the condition of guide conductors; in fig. 2 - lifting vessel with directional seismic sensors placed in it, cross section; in fig. 3 - a segment of the recorder recording tape on which impulses of shock loads are fixed; in fig. 4 is a graph of damped oscillations of a directional seismic sensor with a positive amplitude of the first harmonic of natural oscillations with a zero phase; FIG. 5 is the same, with a negative first amplitude of natural oscillations with a phase of 180.

The method of monitoring the condition of the guide conductors is carried out using a device (Fig. 1) consisting of a transmitting station 1, a receiver 2 and a recording unit 3.

Transmitting station 1 is located directly in lifting vessel 4 and consists of sensors 5 of dynamic loads made in the form of seismic type vibration sensors and transmitter 6, for example, high frequency currents. The transmitter 6 has an inductive connection with the hoisting cable 7 by means of a connecting high-frequency transformer 8. The transformer 8 is made of ferrite magnet wire of an annular form, covering the lifting cable 7 above the lifting vessel 4. The lifting cable is the single-turn secondary winding of the transformer 8, the primary winding is placed on its magnetic core.

The sensors 5 (Fig. 2) are fixed on the wall of the lifting vessel 4 at the installation site of one of the guide bolsters. poppies moving along guideways. The sensors 5 are mounted on the lifting vessel 4 so that they can sense impacts, for example, in two mutually perpendicular horizontal directions. Such anchoring of the sensors 5 is necessary in order to determine the direction of impacts.

55

0

.

The first directional sensor 5 is oriented along the lifting vessel and forms the first information transmission channel, the second sensor 5 is oriented across the lifting vessel and forms the second channel. The natural frequencies of the sensors are different, for example 50 and 120 Hz. According to these frequencies, the first and second channels are separated in block 3 of registration.

You can install and three sensors 5, oriented in three-dimensional space. In addition, it is possible to determine the direction of impacts in three-dimensional space — in two horizontal directions and, additionally, in vertical.

The transmitter 6 is fixed at the top of the lifting vessel 4. It is equipped with at least two inputs for connecting sensors 5, its output is connected to transformer B.

The receiver 2 includes the actual receiver 5 connected to the high-frequency transformer 9. Transformer 9 is also made of a ferrite ring core with a winding and is fixed at the top of the hoisting rope 7 so that the rope: is held at the same time as the lifting vessel moves through the window of the transformer and torus 9 magnetic circuit.

The registration unit 3 consists of a filter unit 10, a recording device 11, an electrical oscillation indicator 12 and a switch 13.

The filter unit 10 consists of two low-pass filters, each of which is tuned to its own oscillation frequency of one of the sensors 5. When using three sensors 5, the filter block 10 takes three-channel ones. The input of the filter unit 10 is connected to the output of the receiver 2, and the outputs of the filter unit 10 are connected to the inputs of the recording device 11.

The drive of the recording tape in the self-detecting device is connected with the output of the lift vessel location sensor J4.

0

five

0

five

The switch 13 is designed to connect the indicator 12 to one of the outputs of the unit 10, the Receiver 2 and the registration unit 3 are located at the hoist control panel. Receiver 2 is connected to the transformer 9 with an adaxial cable. Lifting vessel

15

moves along guides conductor 15.

The proposed method is carried out as follows.

After the remote control equipment for dynamic loadings on the guide conductors is mounted on the lifting magazine, it is calibrated. At the same time, in fastenings of the sensors 5, strikes of a known value are struck in the directions of action of the sensors 5 and the maximum amplitudes of the electrical oscillations of the sensors 5 are recorded on the recording tapes of the recording device 11 installed at the elevator control panel.

The cost of dividing the scale of the self-searching device 11 is determined by the magnitude of the impact force and the amplitude of the first harmonic of the oscillations of the sensors 5 recorded on the recording tape. Then, for each sensor of the 5 phase wires, i.e. correspondence of the direction of the impact to the phase of the recorded amplitude of the first harmonic on the recorder tape 11.

When the lifting vessel 4 moves along the new guide conductors 15, the sliding of the shoes occurs smoothly and there are no shock loads. As the guide conductors 15 wear out as the lifting vessel 4 moves, the latter strikes the conductors 15. The more wear wears the conductors 15, the greater the blows. The shocks excite the vibrations of the lifting vessels 4. These vibrations by the sensors 5 are sensed and converted into damped electrical oscillations, the frequency of each of which is determined by the natural frequency of the mechanical oscillations.

The electrical oscillations developed by the sensors 5 are fed to the transmitter 6, where they are mixed, amplify and modulate high-frequency electrical oscillations. From the transmitter 6, the modulated high-frequency electrical oscillations are fed to the input of the receiver 2 through the transformer 8, the hoisting cable 7 and the transformer 9. In the receiver 2, these oscillations are detected and amplified and from the output of the receiver 2 are fed to the input of the filter unit 10, where they are divided by natural frequencies of each sensor 5.

From the filter unit 10, the separated signals of the sensors 5 are supplied separately

d | g 20 25

go do

45 50 s

35

sixteen

channels to the recording device 1 1.

In block 3 of the registration signals of each sensor 5 is recorded on the tape as a function of the ascent depth H, usually on a scale of 1: 4000, 1: 2000. Therefore, since the recording tape moves very slowly, on the diagram the entire cycle of decay of its electrical oscillation of sensor 5 is recorded as a dash (Fig. 3).

FIG. 3 shows a recording tape of the recorder, on which diagrams of three lifting cycles are recorded, recorded on the second channel by signals from sensor 5, which is directed across. lifting vessel (indexes X and Y denote the magnitudes of the amplitudes characterizing the electrical oscillations of the sensor 5 operating on the second channel).

From the recorded diagrams, the impact force is determined by the magnitude of the amplitude (X or Y) of the first harmonic of the electrical oscillations of the sensor 5 and the division value of the scale of the self-tracking device. Compared with the calibration results, the direction of impact on the lifting vessel is determined. For example, at the phase of the first amplitude of the first harmonic, equal to O, the impact occurs on the right, at 180 - on the left.

In the absence of signals on the second channel, the direction of impact coincides exactly with the axis of the first sensor.

If there is a significant discrepancy between the direction of the impact and the directions of the sensors 5, the monitoring is carried out according to the readings of the two sensors 5. The direction of the impact is determined from the relations:

Ai .. Ah, Sinq

-.JA

BUT

.A4

Q arcng -;

C), + Wed, 90,

de C |, is the angle between the axis of impact direction and the axis of directivity of the first sensor 5; Cpj is the angle between the axis of impact direction and the axis of directivity of the second sensor 5; And, - the first amplitude of the first harmonic of oscillations of the first sensor 5;

And - the first amplitude of the first harmonic oscillations of the second sensor 5.

Example. Let the blows with a force of 500 kgf be applied to the lifting vessel from the side opposite to the attachment point of the sensors 5 (Fig. 2). The impact is directed towards the center of the lifting vessel and coincides with the directivity of the second sensor 5.

In this case, the second sensor 5 will generate electrical signals, and the first sensor 5 will not work. The recording device 11 will only record the signals of the second sensor 5 through the second channel.

The signals recorded on the recording tape have the form indicated in FIG. 3 indices. From these data it is determined that at a certain depth H there are progressive blows, which carry a great danger. The recording of signals through the second channel indicates that impacts occur in the transverse direction. Using indicator 12 or recording, it is determined that the first amplitude of the first harmonic of the oscillations of sensor 5 is in phase O. According to the data obtained when calibrating phase O of the first amplitude corresponds to the direction of impact P, as shown in FIG. 2

The obtained data is transmitted to the repair team, where the impact force P and its direction are indicated, and also indicate what kind of guide conductor the lifting vessel is struck and at what point (depth). It is also reported that the stroke is progressing. If the impact does not progress and is insignificant in magnitude, then the operator may decide to continue the operation of the lifting installation. FIG. 3 non-progressive blows are denoted by the indices YI, y ,,, Yj.

; Thus, according to the magnitudes of the first amplitude and its phase of the first harmonic, recorded, depending on the months of the position of the lifting vessel and their changes during the operation of the mine lifting installations,

SRI has directed 1x lvodnikov, degree

wear and quality of fastening them in the shaft.

Claims (2)

1. A method for controlling the movement of a lifting vessel in a shaft, including measuring dynamic loads acting on guide conductors as it moves along lifting vessels, converting loads into electrical signals, recording these signals and determining the location of the lifting vessel, increase the reliability of monitoring the condition of guide conductors, as dynamic loads are measured during operation in mutually perpendicular directions; the vibration of the lifting vessel, the first harmonic of the vibration is distinguished, the first amplitude and its phase, which are recorded in accordance with the location of the lifting vessel, compare the magnitudes of the first amplitudes and their phases corresponding to the same location of the lifting vessel, and compare the results of guide conductors. 2. A device for monitoring the movement of the lifting vessel in the shaft of the mine, containing sensors of dynamic loads connected to a transmitter, which is connected to the first input of the recording unit through the first transformer and receiver, in order to increase the reliability of control of the directional state conductors, a position sensor is inserted into it, a lifting vessel, the output of which is connected to the second input of the registration unit, and the dynamic load sensors are inserted in the form of vibration sensors with a given frequency of idents oscillations and mounted in mutually perpendicular directions. W: 15 , / L gr 0i / s.2 0L / e.S - / Fie.5 Editor M. Kelemesh Compiled by V. Kopyshov Tehred M. Didyk CorrectorN. King Order 7606/19 Circulation 628 VNIIPI State Committee for Inventions and Discoveries at the State Committee on Science and Technology of the USSR 113035, Moscow, Zh-35, Raushsk nab. 4/5 Production and Publishing Combine Patent, Uzhgorod, st. Gagarin, 101 0i / e.k Subscription