Underground mine cars are common transportation tools in mines and are widely used in coal mines, metal mines and other fields. In coal mines, underground mine cars are used for coal mining and transportation. The basic functions of mine carts include loading, transportation, unloading, etc., and with the continuous advancement of technology, the application of underground mine carts is also constantly developing. According to different use environments and transportation needs, underground mine carts can be divided into various types, including electric mine carts, battery mine carts, traction mine carts, etc. Different types of mine carts have different characteristics and scope of application. With the development of automation technology, the degree of automation of underground mine cars has also been continuously improved. More and more underground mine cars have realized autonomous navigation, intelligent control and other functions, which greatly improves the efficiency and safety of transportation. However, the operating environment of underground mine cars is still complex. The application of valuable unmanned technology makes operating mine cars without the supervision of operators, which also brings more safety hazards to underground mine cars, such as spontaneous combustion risks.
The underground mine car is a heavy mobile equipment. Its spontaneous combustion process is a transition from spontaneous combustion to an open flame, and the local fire spreads to the entire body. Its propagation mechanism is relatively complex. Therefore, the underground mine car fire defense equipment should choose an automatic fire extinguishing system that is more independent and better. Take measures before spontaneous combustion and at the early stage of the fire to avoid expanding the burning area. The existing vehicle-mounted fire extinguishing systems currently on the market usually install temperature sensors, flame sensors, etc. in the vehicle body to determine whether the vehicle is burning, and then provide power through the power supply. When a fire is detected, the system is manually activated to extinguish the fire. The disadvantage of this type of automatic fire extinguishing system is that the system is restricted by the power supply and the performance stability is insufficient; secondly, manual activation cannot solve the problem of unattended mine car safety protection and is very likely to cause a delay in rescue. Fire extinguishing facilities may not be activated until the fire spreads. If the fire is not extinguished in time, mass deaths and injuries may easily occur.
The mining vehicle automatic fire extinguishing system is a purely mechanical self-starting fire extinguishing device. This system currently has application cases in mining companies around the world, and because of its simple installation, reliable performance, and fully automatic operation, it is widely used in The installation volume of industrial and mining vehicles such as support trucks, frame transport trucks, hydraulic excavators, loaders, scrapers, and wide-body dump trucks for reprinting and transportation is increasing year by year, and has successfully become a standard fire protection product for heavy mobile equipment in the mining field. .
The operating principle of the automatic fire extinguishing system is to continuously detect the real-time temperature in each space through temperature-sensitive fire source detectors installed in flammable parts such as vehicle engine compartments (trigger temperatures based on different space preset values). When the trigger temperature value is detected The early warning device and the self-starting device are immediately activated through mechanical linkage, and then the system releases fire extinguishing agents to extinguish the fire at the same time as the early warning. The defense of the entire system is more comprehensive, and fire extinguishing is more accurate and effective, which can reduce the probability of mine car fires through active prevention. It can be promoted and popularized on heavy mobile equipment in various fields such as petroleum, ports, mines, agriculture, forestry, and airports.
