Method for detecting operation troubles of mine hoist

A technology of mine hoist and operation failure, applied in the direction of hoisting equipment, elevator, transportation and packaging in the mine, can solve the problem of inability to detect the hoist, and achieve the effect of wide practicability, simple hardware equipment and strong real-time performance.

Inactive Publication Date: 2011-01-12
CHINA UNIV OF MINING & TECH
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AI-Extracted Technical Summary

Problems solved by technology

[0004] The purpose of the present invention is to provide a mine hoist operation fault detection method to solve the problem that it is impossible to ...
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Abstract

The invention relates to a method for detecting operation troubles of a mine hoist. The method comprises the following steps of: axially arranging a wireless stress sensor on a hoisting sheave shaft or a guide wheel shaft, wherein the wireless stress sensor is used for acquiring a stress-strain signal on the shaft and transmitting the stress-strain signal to an industrial personal computer through a wireless signal receiving device; identifying peaks and troughs of the stress-strain signal to acquire a real-time hoisting speed curve and a hoisting container depth curve by a mine hoist operation trouble detection module in the industrial personal computer, simultaneously converting the stress-strain signal according to a corresponding relationship between the stress-strain signal and a hoisting load to acquire a real-time hoisting load curve; and judging whether phenomena such as over-winding, over-unwinding, slipping, cage clamping, rope releasing, overloading and the like exist or not by combining the hoisting speed curve given by the hoist, rated load and the reading of a depth indicating meter on the basis of the acquired three real-time curves. The method has the advantages ofsimple required hardware equipment, high reliability, high anti-interference performance, high real time property and capacity of detecting various troubles simultaneously.

Application Domain

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  • Method for detecting operation troubles of mine hoist
  • Method for detecting operation troubles of mine hoist
  • Method for detecting operation troubles of mine hoist

Examples

  • Experimental program(1)

Example Embodiment

[0033] Embodiment 1: The method for detecting the operation failure of the hoist according to the present invention is implemented on the mine friction hoist according to the following steps:
[0034] Step 1: Arrange a wireless stress sensor along the axial direction on the guide wheel shaft of the friction hoist, using the DH5905 wireless stress sensor; arrange the wireless signal receiving device near the guide wheel, using the DH5905 wireless signal receiver; the wireless signal receiving device is through the USB interface Connect with industrial computer;
[0035] Step 2: Start the wireless stress sensor. The wireless stress sensor collects stress and strain signals from the steering wheel axle in real time, and sends the collected stress and strain signals to the wireless signal receiving device, and the wireless signal receiving device transmits the stress and strain signals to the industrial computer;
[0036] Step 3. The hoist fault detection module in the industrial computer analyzes the received stress and strain signals to obtain the hoist's real-time hoisting speed curve, hoisting container depth curve, and hoisting load curve. The specific method is as follows: Based on the curve of the stress and strain signal on the guide wheel shaft collected by the wireless stress sensor with time, the angular velocity of the shaft rotation is calculated in real time by identifying the interval between the peak and the valley in the curve, so as to obtain the lifting speed curve, and then integrating the lifting speed to obtain Lifting container depth curve; In addition, the hoist operation fault detection module converts the stress-strain signal according to the corresponding relationship between the stress-strain signal and the lifting load to obtain the real-time lifting load curve;
[0037] The specific working process of the said hoist operation fault detection module is as follows:
[0038] a. The hoist operation fault detection module judges whether there is an over-winding and over-discharging fault phenomenon during the operation of the hoist.
[0039] (1) Define threshold J 1 =0.5m/s;
[0040] (2) Calculate the difference between the real-time lifting speed curve and the lifting speed curve given by the hoist design e 1 Curve with time;
[0041] (3) If e 1J 1 , The hoist may have over-winding and over-discharge; otherwise, it means that the hoist's operating speed is within the normal range;
[0042] (4) According to the real-time lifting container depth curve, further judge the location of the lifting container; if the lifting container is near the well head, and e 1J 1 , There may be over-rolling; if the lifting container is near the bottom of the well, and e 1J 1 , There may be over-discharge; if the lifting container is neither at the well head nor at the bottom of the well, it means that the operating speed of the elevator is abnormal.
[0043] b. The hoist operation fault detection module judges whether there are jamming and loose rope faults during the operation of the hoist. The process is as follows:
[0044] (1) Calculate the average lifting load according to the real-time lifting load curve;
[0045] (2) Define threshold J 2 =100kg;
[0046] (3) Calculate the difference between the lifting load and the average lifting load at a certain time e 2 , If e 2J 2 , It means that there may be a jam fault at this moment, if e 2 2 , It means that there may be a loose rope fault at this moment.
[0047] c. The hoist operation fault detection module judges whether there is an overload fault phenomenon in the hoist operation process as follows:
[0048] (1) Define threshold J 3 =100kg;
[0049] (2) Calculate the difference between the real-time lifting load curve and the rated load of the hoist e 3 , If e 3J 3 , It means that there may be an overload fault at this moment.
[0050] d. The judgment process of the hoist operation fault detection module on whether there is a slipping fault phenomenon during the operation of the friction hoist is as follows:
[0051] (1) Define threshold J 4 =1m;
[0052] (2) Calculate the difference between the real-time lifting container depth and the depth indicated by the hoist depth indicator e 4 , If e 4J 4 , There may be a slip fault.
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