Fire early warning method and system for mine belt conveyor

Abstract

The invention discloses a fire early warning method and a fire early warning system for a mine belt conveyor. The system comprises temperature measuring optical fibers, a temperature measuring optical fiber host, a temperature measuring optical fiber heat conducting fixture and a monitoring host, wherein the temperature measuring optical fiber host is used for providing incident laser pulses and acquiring and analyzing backward heat dissipation light returned by the temperature measuring optical fibers to acquire the temperatures and distance parameters of temperature measuring points; the temperature measuring optical fiber heat conducting fixture is used for fixing the temperature measuring optical fibers at a plurality of temperature measuring positions on the mine belt conveyor; and the monitoring host is used for receiving the temperature and distance parameter of each measuring point sent by the temperature measuring optical fiber host and comparing whether the temperature valueof each position exceeds a warning threshold or not. An attached optical fiber temperature measuring concept is also creatively provided, so that the accuracy and reliability of optical fiber temperature measuring are ensured; the temperature detection of a conducting key point of the heat conducting fixture is creatively combined with direct temperature detection of regional environment through the optical fibers, so that the effect of monitoring the temperature of a rubber belt conveyor without any blind area is achieved, and the fire early detection and early warning of a mine underground conveying belt is realized.

Description

technical field [0001] The invention relates to the field of coal mine safety, in particular to a monitoring method for fire warning of belt conveyors used in mines, and also relates to a monitoring system for fire warnings of belt conveyors used in mines. Background technique [0002] Mining belt conveyors are prone to fires due to long-term use. The main causes of fires are as follows: ①Drum slipping: Under normal operating conditions, the slip rate of the belt relative to the surface of the drum generally does not exceed 2%. If the tape slips, there will be a large relative sliding between the tape and the roller, which will cause the friction temperature to rise. If it is not found in time, once the temperature rises to the ignition temperature of the tape, it will cause a fire. The common reasons for the slippage of the active roller are: the head of the machine is piled with coal after the warehouse is full, the anti-skid rubber on the roller is seriously worn, and the...

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