DN inner injection single hydraulic prop

profile

DNDN inner injection single hydraulic prop for theinternal structure of the mine for the fluid hydraulic prop, mainly consist bythe roof, ventilation valve, cylinder, live cylinder, piston, hand pump,unloading valves, safety valves and handles body and other component parts.

DN inner injection single hydraulic prop plays a big rolein the mine roadway support, get the acceptance and use of country's major coalmines customers , it is simple, easy to use, without liquid injection, thedirect use hand crank to complete hydraulic prop lift column and drop column

Application scope

DN inner injection single hydraulic propcould be applied for coal mining face of the roof support and the end platesupporting the head, because of its large carrying capacity, anti-bias loadcapacity, large working stroke, using a wide range, so it can be used in thincoal seam, the seam and over thick coal SeamWorking face。

Working principle

DN inner injection single hydraulic propThe working fluid is the 5th hydraulic oil, back to the column when thehydraulic oil flow back into the cylinder plunger cavity to form a closed loop;does not require pumping and piping systems, auxiliary equipment, low cost;mains and pumping stations in the absence of local still use, flexibility, easymanagement and simple; since the working fluid is a closed loop, prop prophydraulic oil flowing back when the plunger cavity pillar itself to achieveclosed loop hydraulic oil, hydraulic oil consumes very little; pillar hydraulicsystem for the closed system, hydraulic oil does not spill, do not pollute the environment,environmental protection, and face the production of small, well maintainedface environment, better working conditions; pillar valve is fully installed inthe pillar cavity , the possibility of contamination by outside the small, highreliability.