The utility model discloses a protective sleeve for a single hydraulic prop and a movable column body. It is composed of a ring-shaped tightening sleeve, a pressing plate, and a cylindrical telescopic sleeve with an upper end fixed on the tightening sleeve and a lower end fixed on the pressing plate. When in use, the protective sleeve is sleeved outside the living column, the tightening sleeve is clamped on the upper end of the supporting column, and the pressing plate is fixed on the supporting handle body. The utility model has the advantages of simple structure, convenient use and easy replacement, and can greatly extend the service life of the single hydraulic prop.
The metal roof beam can be combined with various types of metal Hydraulic Acrow Props to form a metal support, which is a high-strength roof beam for the support of the coal mine in the horizontal and gently inclined working face. Because this kind of roof beam can cantilever support the working face, The roof above the conveyor road in front of the coal wall is a large supporting space between the coal wall and the hydraulic prop. The working fluid is provided by the pumping station and injected into the pillar through the liquid injection gun to raise it and set it up. It has the characteristics of fast set-up speed, labor-saving, and large application range.
At present, there are mainly 13 external injection pillars with φ100mm cylinder diameter from 0.6-3.5M. It is characterized by its own pump and oil. When supporting, the column can be lifted quickly by shaking it by hand, and the working fluid is not discharged when the column is lowered, which can better protect the Hydraulic Prop working environment, and is convenient to use, flexible to manage, and simple to equip. At present, there are mainly 12 internal injection pillars with φ90mm cylinder diameter from 0.6-3.15M.
Shandong China Coal Mining Group Co., Ltd. mainly produces and sells Hydraulic Acrow Props, suspension hydraulic props, etc., and is an important manufacturer of hydraulic props. Welcome friends from all walks of life to discuss cooperation and seek common development!
