profile

DNDN inner injectionsingle hydraulic prop for the internal structure of the mine for the fluidhydraulic prop, mainly consist by the roof, ventilation valve, cylinder, livecylinder, piston, hand pump, unloading valves, safety valves and handles bodyand other component parts.

DN inner injection singlehydraulic prop plays a big role in the mine roadway support, get the acceptanceand use of country's major coal mines customers , it is simple, easy to use,without liquid injection, the direct use hand crank to complete hydraulic proplift column and drop column

Application scope

DN inner injection single hydraulic prop could be applied for coal miningface of the roof support and the end plate supporting the head, because of itslarge carrying capacity, anti-bias load capacity, large working stroke, using awide range, so it can be used in thin coal seam, the seam and over thick coalSeam.

Working principle

DN inner injection single hydraulic prop The working fluid is the 5thhydraulic oil, back to the column when the hydraulic oil flow back into thecylinder plunger cavity to form a closed loop; does not require pumping andpiping systems, auxiliary equipment, low cost; mains and pumping stations inthe absence of local still use, flexibility, easy management and simple; sincethe working fluid is a closed loop, prop prop hydraulic oil flowing back whenthe plunger cavity pillar itself to achieve closed loop hydraulic oil,hydraulic oil consumes very little; pillar hydraulic system for the closedsystem, 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.

Introduction

DN31-160/90singlehydraulic prop

DN28-200/90inner injectionhydraulic prop ，

DN25-250/90 singlehydraulic prop，

DN（06、08、10、12、14、16、18）-250/80inner injection hydraulic prop ect.