Automatic fire extinguishing system for belt conveyor based on distributed optical fiber temperature measurement technology

Abstract

The invention discloses an automatic fire extinguishing system for a belt conveyor based on distributed optical fiber temperature measurement technology. The automatic fire extinguishing system comprises a control host which is connected with a ground monitoring alarm center through a network switch to receive signals, connected with a distributed optical fiber temperature measurement system to monitor data, connected with a belt conveyor explosion-proof switch and a sound and light alarm to receive temperature signals and then control the belt conveyor explosion-proof switch to close the belt conveyor and start the sound and light alarm, and connected with an explosion-proof solenoid valve and a corresponding high-pressure water mist nozzle thereof through pipelines to control the explosion-proof solenoid valve to open or close the high pressure water mist nozzle. The high-pressure water mists are used for extinguishing the fire, water consumption is low, fire extinguishing effects are good, and the system effectively solves the practical problems of untimely fire extinguishing, low efficiency and poor effects of an existing underground coal mine belt conveyor.

Description

technical field [0001] The invention relates to an automatic fire extinguishing system of a coal mine underground belt conveyor, in particular a long-distance fully automatic fixed-point automatic fire extinguishing system based on an intelligent monitoring system, which is used for fire monitoring and prevention of a mine underground belt conveyor. Background technique [0002] As the center of the coal transportation system, the belt conveyor is widely used in coal mines, and it has also become one of the danger sources of mine fires. Effective prevention of tape fires and timely and rapid extinguishment of fires have become the top priority to reduce mine accident losses, ensure the safety of underground production personnel, and reduce the loss of coal enterprises. [0003] At present, the open sprinkler system is mainly used in underground coal mines, which is usually connected and controlled by smoke sensors. Control the relay on the power supply board, cut off the po...

AI Technical Summary

Problems solved by technology

[0003] At present, the open sprinkler system is mainly used in underground coal mines, which is usually connected and controlled by smoke sensors. Control the relay on the power supply board, cut off the power supply of the main control box of the transport aircraft, and turn on the electric bell to send an alarm signal. At the same time, turn on the solenoid valve and turn on the sprinkler to realize automatic fire extinguishing. The disadvantage of this fire extinguishing system is that it is generally only installed on the transport aircraft. For the fire monitoring and fire extinguishing along the transport plane at the nose, tail and transfer points, usually only smoke sensors are installed to realize the alarm, fire sand is placed, fire valves are arranged, etc., and the fire situation is mainly controlled by manual fire extinguishing after the fire is discovered.

[0004] In addition, there are also related automatic fire extinguishing invention patents, such as the patent No. 201610025923.1 titled "An all-round three-dimensional fire warning and automatic fire extinguishing system based on intelligent interaction". Toxic gas detectors, combustible gas detectors and distribution box wire current and temperature detectors detect fires, and transmit data to the alarm monitoring center, and the monitoring center can choose automatic or manual fire extinguishing methods according to needs. The automatic water cannon installed on the site realizes fire extinguishing. The advantage is that it can monitor the fire in all directions in real time. The disadvantage is that the installation cost is relatively large, the deployment and control range is small, and the intelligence of automatic fire extinguishing is relatively low.

Another example is the patent No. 201510738806.5 titled "A Coal Mine Underground Coal Mine Atomization Flame Retardant and Fire Extinguishment Method and System", mainly through the collection of gas parameters, temperature parameters, and dust parameter information, the ground control terminal analyzes and processes the data, and controls the underground spraying The flame retardant system realizes fire extinguishing. The advantage is that the fire can be judged comprehensively through temperature changes and CO concentration changes, with high accuracy. At the same time, the fire extinguishing system is automatically activated, with a high degree of intelligence. The fire extinguishing uses a new atomization flame retardant technology, and the fire extinguishing effect is good. Realize the deployment and control of key areas in the mine, but the disadvantage is that the deployment and control range is limited to local key areas, and is not suitable for long-distance roadways and conveying equipment

Another example is the patent No. 201110403955.8 titled "Underground Fire Monitoring and Processing System in Coal Mine". A fire extinguishing robot for underground is designed to detect fires through multiple fire monitoring devices arranged underground, and the upper monitoring host processes the fire information. , control the fire extinguishing robot in the corresponding area to extinguish the fire at the fire source, and the fire extinguishing robot is equipped with a hand-held remote control. When necessary, the on-site workers control the robot to extinguish the fire. The advantages of this invention are high degree of automation, wide deployment and control range, and real-time monitoring of the entire underground range. And protection, the disadvantage is that it is affected by the speed of the robot, the response time is longer, the technology is more complicated, and the maintenance is inconvenient

Another example is that the patent No. 200910219657.6 is titled "A Long Tunnel Automatic Fire Extinguishing System and Fire Extinguishing Method". After the smoke temperature sensor of each partition detects a fire in the partition, the PLC controller controls the pressurized water supply in the partition, and starts the three-tangential trough-type direct jet flow fine water mist nozzle in the partition to spray fine water mist to separate and extinguish the fire. The advantages of this invention are: Simple structure, high degree of intelligence, automatic monitoring and fire extinguishing, high-pressure water mist fire extinguishing, high fire extinguishing efficiency, fire extinguishing in different areas can control the cost of fire extinguishing, the disadvantage is that the location of the monitoring fire source is not specific, and targeted fire extinguishing cannot be realized

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