A dual-cylinder type automatic control system and control method for windshields in coal mines

Abstract

The invention discloses a double-air-cylinder automatic regulation and control system for a downhole air window of a coal mine and a control method of the double-air-cylinder automatic regulation and control system. The double-air-cylinder automatic regulation and control system for the downhole air window of the coal mine comprises a signal acquisition system and a control and regulation system. The signal acquisition system comprises a wind speed sensor, a stay wire type displacement sensor and a programmable logic controller (PLC) sequentially connected with the stay wire type displacement sensor. The control and regulation system comprises an air window shutter gate, a movable shutter air window, a positioning air cylinder, a clutch locking nut, a power air cylinder, a first electromagnetic valve, a second electromagnetic valve, the PLC, an auxiliary element and an air source. According to the double-air-cylinder automatic regulation and control system for the downhole air window of the coal mine and the control method of the double-air-cylinder automatic regulation and control system, the air volume in a roadway can be monitored in real time, automatic and quantitative regulation of the ventilation area of the air window is achieved, and the absolute value of the air volume difference value Qmin+Qmax / 2-Q is used as an air volume regulation value, so that the problem that the regulation frequency of the air window is increased when Q-Qmin or Qmax-Q is used as the air volume regulation value is solved; the service life of equipment is prolonged, and the use efficiency of the equipment is improved; the cost is reduced, the ventilation requirement of downhole places with changeable air volumes is met, and the distribution of the downhole ventilation volume is effectively guaranteed.

Description

technical field [0001] The invention relates to a double-cylinder type automatic control system for a wind window in a coal mine and a control method thereof. Background technique [0002] The coal industry has made significant contributions to my country's economic and social development and is the dominant industry in my country. With the development of the coal industry, the output of coal has increased, but the expansion of mining scale and the speed of scientific and technological development lag behind the speed of economic development. Coal accidents occur frequently in my country, which seriously threatens the safety of mine production. According to statistics, from 2012 to the first half of 2013, more than 800 coal accidents occurred in my country, and about 1,654 people died. Nearly half of the serious accidents were closely related to the imperfect ventilation system of mines. [0003] Mine ventilation is a very important work in mine production. The quality of u...

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Problems solved by technology

[0006] Aiming at the above-mentioned problems existing in the prior art, the present invention provides a double-cylinder type automatic control system and its control method for underground air windows in coal mines, which can monitor the air volume of the roadway in real time, and the air volume does not meet the air volume range required for roadway production (Qmin, Qmax ), the control system precisely controls the air volume of the roadway by automatically and quantitatively adjusting the ventilation area of ​​the windshield, and uses the air volume difference|(Q min +Q max ) / 2-Q| is the air volume adjustment value, avoiding the use of Q-Q min or Q max -Q is the problem of increasing the adjustment frequency of the windshield due to the difference in air volume adjustment, which improves the service life and efficiency of the equipment while reducing costs, meets the ventilation requirements of places where the underground air volume is variable, and effectively ensures the distribution of underground ventilation.

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