Introduction Of DN Inner Injection Single Hydraulic Prop

DN inner injection single hydraulic prop for the internal structure of the mine for the fluid hydraulic prop, mainly consist by the 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 role in the mine roadway support, get the acceptance and 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 prop lift column and drop column

Application Scope Of DN Inner Injection Single Hydraulic Prop

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

Working Principle Of DN Inner Injection Single Hydraulic Prop

DN inner injection single hydraulic prop The working fluid is the 5th hydraulic oil, back to the column when the hydraulic 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, easy management and simple; since the working fluid is a closed loop, prop prop hydraulic oil flowing back when the plunger cavity pillar itself to achieve closed loop hydraulic oil, hydraulic oil consumes very little; pillar hydraulic system for the closed system, hydraulic oil does not spill, do not pollute the environment, environmental protection, and face the production of small, well maintained face environment, better working conditions; pillar valve is fully installed in the pillar cavity , the possibility of contamination by outside the small, high reliability.

DN31-160/90single hydraulic prop

DN28-200/90inner injection hydraulic prop ,

DN25-250/90 single hydraulic prop,

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

Parameter Of DN Inner Injection Single Hydraulic Prop

Model	DN06	DN08	DN10	DN12	DN14	DN16	DN18	DN20	DN22	DN25	DN28	DN31.5	DN35	DN38	DN40	DN42	DN45
Max Height mm	650	800	1000	1200	1400	1600	1800	2000	2240	2500	2800	3150	3500	3800	4000	4200	4500
Min Height mm	510	590	700	850	1000	1100	1200	1390	1540	1800	2100	2450	2800	3100	3300	3500	3800
Working Limit mm	140±10	210±10	300±10	350±20	400±20	500±20	600±20	610	700	700
Rated Working Resistance kN	250							300		250		160		150
Rated Working Pressure MPa	49							46.3		39.3		25.1		15.7
Cylinder Inner Dia mm	80							90		90				110
Initial Support kN	49				68.7-78.5					68.7-78.5
Base Area cm2	120									120				147
Max. Torque On Handle N.m	＜200									＜200
Increase Height per Handle Shake mm	≥12				≥20					≥20
Down Prop Seed mm/s	＞20				＞30					＞30
Working Medium	5# hydraulic oil 5#Hydraulic oil									5#Hydraulic oil
Weight kg	23	26	29	34	38	41	45	55	60	68	74	78	86	91	95	113	119
Applicable Coal Seam Thickness m	0.6	0.7～0.8	0.9～	1.1	1.3	1.4	1.5	1.6 -	1.8 -	2.1 -	2.4 -	2.75 -	3.15 -	3.15 -	3.3 -	3.7 -	4.0 -
			1	～1.2	～1.4	～1.6	～1.8	2	2.2	2.5	2.8	3.15	3.5	3.5	3.8	4.2	4.5

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