A coal mine explosion-proof water shed water injection monitoring system

Abstract

The invention provides a coal mine explosive-proof water shed injection monitoring system. The coal mine explosive-proof water shed injection monitoring system comprises a PLC, a water injection spraythrower, a water injection water level indicating device, an alarm, a manual control valve and an electric control valve, wherein the manual control valve and the electric control valve are arrangedon a pipeline between the water injection spray thrower and a water source. The water injection water level indicating device comprises a vertical rod, two static metal sheets and a movable metal sheet located below the two static metal sheets. A jacking rod is arranged on the lower end face of the movable metal sheet, a guiding rod is perpendicularly fixed to the jacking rod, and a jacking and pressing plate is perpendicularly mounted at the bottom of the jacking rod. The lower end of the vertical rod is hinged to one end of a movable rod, and a floating ball used by cooperating with the jacking and pressing plate is fixed to the other end of the movable rod. One static metal sheet, a relay KA, a direct current power source and the other static metal sheet are connected in sequence. A displayer, the alarm, the electric control valve and a normally open contact KA-1 of the relay KA are in signal connection with the PLC. The coal mine explosive-proof water shed injection monitoring system is beneficial for stopping water injection when the liquid level of water injected into an explosive-proof water shed reaches a preset position.

Description

technical field [0001] The invention relates to the field of coal mines, in particular to a water injection monitoring system for a coal mine explosion-proof water shed. Background technique [0002] In coal mine production, coal dust or gas explosion accidents cause many casualties every year and bring huge losses to the national economy. my country's "Coal Mine Safety Regulations" clearly stipulates that explosion-proof facilities must be installed at the coal roadway driving face of high-gas mines. Coal dust explosion hazard mines must have measures to prevent and isolate coal dust explosions. Among them, the explosion-proof water shed installed in the roadway is a commonly used measure. The explosion-proof water shed must meet the general technical requirements for the coal mine explosion-proof water shed, and pass the inspection of the national quality inspection department. [0003] Generally speaking, the water consumption of the explosion-proof water shed can be det...

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Problems solved by technology

[0004] However, there is no good technology for monitoring the water injection of the explosion-proof water shed in the prior art, which is not conducive to the smooth completion of the water injection of the explosion-proof water shed

In addition, the explosion-proof water shed commonly used in the prior art is usually welded into a rectangular iron frame with pipes, and then a number of hooks are welded on it to hang the water bag. Although it is relatively easy to hang the water bag, the hook is easy to break and difficult to replace.

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