Device and method for monitoring tension of steel wire rope of FBG (fiber bragg grating) compression type mine hoisting equipment

Abstract

The invention provides a device and a method for monitoring the tension of a steel wire rope of FBG compression type mine hoisting equipment. The device comprises the steel wire rope, anti-slip wedged rubber rings and a packaging casing, wherein the wedged rubber rings are buckled, clamped and nested on the steel wire rope; an elastic compression column and a U-shaped fixing support fixedly connected with the elastic compression column are arranged inside the packaging casing; the U-shaped fixing support is used for fixing a fixed pulley; FBGs are pasted to the upper end surface and the lower end surface of the elastic compression column; the FBGs are connected onto optical fibers in series; each optical fiber penetrates through an optical fiber lead-out hole to be connected with one end of each optical fiber connector outside the packaging casing; the insides of the optical fiber lead-out holes are sealed with sealant; the other ends of the optical fiber connectors are connected with optical fiber pigtails; the optical fiber pigtails are protected by using armed protection rubber; and the top and the bottom of the packaging casing are fastened by clamp nuts and bolts penetrating through bolt holes. The device is simple in structure and convenient to mount, operate and use, the tension can be monitored on the side and on line, an FBG sensing technology is used, the reliability and the measurement accuracy are high, and the error is smaller.

Description

technical field [0001] The invention relates to the technical field of safety monitoring of coal mine equipment, in particular to a fiber grating compression type mine hoisting equipment wire rope tension monitoring device and method suitable for hoisting equipment such as coal mine hoists and cages. Background technique [0002] In the process of coal mining, the safety of hoisting equipment is particularly important. The tension of the wire rope directly determines its life and mine hoisting safety. As an important part of mine hoisting equipment, the wire rope will be subjected to a lot of stress when the hoisting equipment is working. The effect of the steel wire rope will be severely stretched, and sometimes it may break, which will cause major safety accidents and cause serious personal and property losses. Therefore, it is very necessary to monitor the wire rope tension of mine hoisting equipment. [0003] The tension monitoring of steel wire rope is a complex work, ...

AI Technical Summary

Problems solved by technology

[0003] The tension monitoring of steel wire rope is a complicated task, and it is often difficult to make correct judgments, and it is difficult to detect the existing safety hazards in time

At present, there are mainly three methods for monitoring the tension of the wire rope: one is to connect a load cell in series between the wire rope and the hoisting weight to measure, this method must be measured in a static state of the wire rope, and this measurement method is During operation, the load cell should always be installed on the lifting equipment, and the sensor is loaded for a long time, causing the measuring element in the sensor to creep, resulting in a large drift during measurement, and the linearity and sensitivity decrease; one is to use the vibration wave Measure by using the impact force to vertically hit the steel wire rope to generate lateral vibration, and then calculate the tension value of the steel wire rope by testing the vibration frequency of the steel wire rope. This measurement method has low accuracy and large error, and cannot meet the needs of actual engineering; one is to use capacitance or inductance to monitor the tension of the steel wire rope, and use the change value of capacitance or inductance, and the change value of the diameter of the steel wire rope, through calculation. Find the tension of the steel wire rope. The disadvantage of this measurement method is that the capacitance or inductance is charged, the anti-electromagnetic interference ability is weak, and it is easily affected by the complex environment, which affects the measurement accuracy.

Images