Spraying linkage integrated dust falling system used for coal mine underground fully mechanized coal mining face

Abstract

The invention provides a spraying linkage integrated dust falling system used for a coal mine underground fully mechanized coal mining face. A power supply starting valve is opened, so that a coal cutter starts coal cutting work; a signal integrator I controls a solenoid valve I, a variable-frequency power supply switch, a water pressure sensor and a flow sensor to be started; the signal integrator I adjusts the water volume and the pressure required by a coal cutter internal-external spraying device by adjusting the variable-frequency power supply switch, so that good water mist is formed bythe coal cutter internal-external spraying device to efficiently conduct dust falling; and a coal cutter coal cutting signal is transmitted to a signal integrator II, under the condition of simultaneously having the coal cutter coal cutting signal and a hydraulic sensor signal, five spraying devices controlled by a solenoid valve II are started simultaneously, the solenoid valve I is automaticallyclosed after being opened for 2 min, meanwhile, the solenoid valve II next to the wind feeding side is started to conduct all-direction water mist covering on produced dust. The spraying linkage integrated dust falling system can effectively conduct real-time water mist covering on sources producing the dust, dust drifting caused by not-timely spraying is avoided, and meanwhile, the water mist utilization rate is increased.

Description

technical field [0001] The invention relates to a dust suppression system for fully-mechanized mining working faces in coal mines, in particular to a spray linkage integrated dust-suppressing system for fully-mechanized mining working faces in coal mines, and belongs to the technical field of mine dust prevention and control. Background technique [0002] Coal, as the main energy source in China, is mostly mined underground. With the improvement of the mechanization level of underground fully mechanized mining, its dust production has increased significantly, especially the respirable dust below 7.07um suspended in the working environment, which makes fully mechanized mining work difficult. The surface environment is becoming increasingly harsh, and respirable dust can be deposited in the alveoli, which is very harmful to the human body and poses a serious threat to the physical and mental health of underground workers. [0003] At present, the main source of dust in the ful...

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Problems solved by technology

[0003] At present, the main source of dust in the fully mechanized mining face of the coal mine is the coal cutting dust produced by the shearer. In order to control the dust source, the method of combining the internal and external spraying of the coal mining machine with the spraying between the racks is generally used, but the above spraying devices are generally controlled by humans. Its switch cannot realize automatic spraying, which often causes a large amount of dust to float into the air flow due to the failure of opening the internal and external spraying of the coal mining machine and the spraying between the fully mechanized mining support frame during the coal cutting process of the coal mining machine. , affecting the working environment

[0004] In recent years, in response to this problem, there is a technology of using infrared emitting and receiving devices to locate the position of the shearer, and then automatically control the spraying of the fully mechanized support frame near the shearer, as disclosed in the Chinese utility model patent on May 12, 2010 A kind of publication number is CN201460957U " mining coal mining machine dust source intelligent tracking spray dust suppression system ", but this infrared emitting and receiving device is easily affected by the outside world, such as dust deposits on the infrared emitting and receiving device, and personnel Block infrared emitting and receiving devices, etc., so that it cannot normally open the fully mechanized mining support frame spray

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