Thin coal layer supporting device with variable-frequency constant-pressure control system

Abstract

The invention provides a thin coal layer supporting device with a variable-frequency constant-pressure control system. The thin coal layer supporting device solves the problems that in the prior art,the operation space is narrow and small; the work environment is hostile; and the ventilation area is small, so that the work efficiency of workers and the production safety are seriously influenced.The thin coal layer supporting device comprises a top beam and an emulsion pump variable-frequency constant-pressure control system, wherein a front extending beam is arranged at the front end of thetop beam; and a coal baffle plate is arranged at the lower part of the back end of the top beam. The thin coal layer supporting device is characterized in that four guide tubes are fixed to the lowerpart of the top beam; a double-telescopic upright post is arranged in each guide tube; a front upright post base is arranged at the lower end of the front group of double-telescopic upright posts; a back upright post base is arranged at the lower end of the back group of double-telescopic upright posts; a frame moving jack support seat is arranged on the front upright post base; and a frame movingjack is hinged onto the frame moving jack support seat. The thin coal layer supporting device has the advantages that the design is reasonable; the structure is compact; the occupied space is reasonable; the operation performance is stable and reliable; the energy-saving effect is obvious; the supporting efficiency is high; the repair is convenient; the operation cost is low; the ventilation areais large; and the use is safe and reliable.

Description

technical field [0001] The invention belongs to the technical field of coal mine support equipment, and in particular relates to a thin coal seam support with frequency conversion and constant pressure control system, which has good support stability, large activity space, and large support stroke, and can be adapted to the support of thin coal seam working faces. device. Background technique [0002] my country's thin coal seams account for 17.5% of the total reserves, and many mining areas, especially in the south and southwest regions, are the main mining coal seams. Due to mining difficulties, low efficiency, and poor working conditions, the mining of thin coal seams has always been a difficult problem in coal mining. Thin coal seam support equipment is the key to improving work efficiency and safety. Currently, single hydraulic props are mostly used to support the working face. The labor intensity of workers is high, work efficiency is low, and there are great potentia...

AI Technical Summary

Problems solved by technology

When there is no liquid injection, the emulsion supplied is returned to the emulsion storage tank through the unloading valve. This process not only wastes electric energy, but also increases the mechanical wear of the pump, shortens the service life, and reduces the safety factor of the support equipment.

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