There is such a single hydraulic prop movable cylinder protective cover. It is composed of a circular belaying sleeve, a pressing plate and a cylindrical telescopic sleeve with the upper end fixed on the tightening sleeve and the lower end fixed on the pressing plate. When in use, the protection sleeve is set outside the live cylinder and the tightening sleeve is stuck at the upper end of the live pillar, and the press plate is fixed on the handle of the live pillar. The utility model has the advantages of simple structure, convenient use and easy replacement of a single hydraulic prop, which can greatly extend the service life of a single hydraulic prop. The utility model discloses a protective cover for a movable cylinder body of a single hydraulic prop. It is composed of a circular belaying sleeve, a pressing plate and a cylindrical telescopic sleeve with the upper end fixed on the tightening sleeve and the lower end fixed on the pressing plate. When in use, the protection sleeve is set outside the live cylinder and the tightening sleeve is stuck at the upper end of the live pillar, and the press plate is fixed on the handle of the live pillar. The utility model has the advantages of simple structure, convenient use and convenient 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 single hydraulic prop to form a metal support, which is a kind of high-strength roof beam for the support of coal mine in horizontal and gently inclined stoping face. Because this roof beam can cantilever support the working face and the roof of conveyer face in front of the coal wall, there is a large support space between the coal wall and prop. The working fluid is provided by the pump station and the prop is raised and set up by means of injection gun. At present, there are mainly 100mm cylinder diameter, from 0.6-3.5m to a total of 13 specifications of external injection pillar. It is characterized by its own pump and oil, when set up, it can be quickly raised by shaking with hand handle, and the working fluid can not be discharged when lowering the column, which can better protect the working environment, and it is convenient to use, flexible to manage and simple to equip. At present, there are mainly 90mm cylinder diameter, from 0.6-3.15m, a total of 12 specifications of internal injection pillar. Mine explosion-proof explosion-proof electrical appliances: DWX suspension type single hydraulic prop mining speakers explosion-proof speaker type flameproof speakers KXY12 mine this Ann speaker voice alarm KXB12 mine voice alarm KXB18 mine voice alarm voice sound and light alarm mine acousto-optic alarm - KXJB1-0.12/127 - mine explosion-proof and intrinsically safe speech sound and light alarm mine explosion-proof and intrinsically safe language sound and light alarm mine intrinsically safe audible and visual alarm sound and light signal device the KXT23 type number acousto-optic signal device of communication.
