Automatic control pressure-equalizing fire preventing and extinguishing system in large area

Abstract

The invention provides an automatic control pressure-equalizing fire preventing and extinguishing system in a large area. Master control equipment is used for transmitting signals of air pressures at two ends of an air leakage channel in a pressure-equalizing area and a signal of pressure difference of two sides of an air window to an upper industrial control computer and transmitting a command for adjusting the current frequency and a command for adjusting the air window according to a control command for pressure-equalizing adjustment transmitted by the upper industrial control computer; the upper industrial control computer is used for determining whether to transmit a control command for pressure-equalizing adjustment to the master control equipment or not according to the signals of the air pressures at the two ends of the air leakage channel and the signal of the pressure difference of the two sides of the air window; a first frequency converter is used for adjusting the rotating speed of a fan and the outlet air pressure according to the command for adjusting the current frequency; a second frequency converter is used for controlling a stepper motor to regulate the opening area of the air window according to the command for adjusting the air window. According to the automatic control pressure-equalizing fire preventing and extinguishing system provided by the invention, the revolution number of the fan and the air passing port area of the air window can be automatically controlled and adjusted, so that the pressure-equalizing area is always kept in a pressure balancing state, and the problem that the pressure-equalizing area is not equalized in pressure due to poorer precision and timelinesses is solved.

Description

technical field [0001] The invention relates to a large-area automatic control pressure equalization fire prevention system under a coal mine, which belongs to the technical field of mine safety and fire prevention. Background technique [0002] The pressure equalization fire prevention method adopted in the mine is to apply the principle of ventilation to suffocate or stop oxidation by reducing the oxygen supply in the goaf or fire area in the high temperature area or fire area of ​​the goaf. Compared with other fire extinguishing methods, it has the characteristics of safety, quickness, high efficiency and low investment, and has been widely used in underground mines. [0003] Fan-window combined pressure equalization is a common method in pressure equalization fire prevention and extinguishing. In the coal mining face, the use of the fan-wind window combined with the open area to equalize the pressure can reduce the air leakage in the goaf at the back of the working face...

AI Technical Summary

Problems solved by technology

[0005] The present invention solves the problems existing in the existing pressure equalization anti-fire extinguishing technology that artificial adjustment of wind sub-balance leads to poor accuracy and timeliness of pressure regulation, and easily causes uneven pressure in the pressure equalization area, and further provides a large area Automatic control pressure equalization fire extinguishing system

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