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China, Chinese Durable Single Adjustable Roof Steel Adjustable Props for Coal Mining Operations1 Industrial Products Supplier Manufacturer Details, price list catalog:
China Industrial Products Supplier Manufacturer List Catalog
Mining MachineryOther Mining MachineryHydraulic PropRoof Support Prop
Shandong China Coal Construction Machinery Co., Ltd.
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Product Description Product DescriptionIntroduction of Coal Mining Hydraulic PropsSingle hydraulic props are divided into external liquid supply type (referred to as external injection type) and internal liquid supply type (referred to as internal injection type) according to their different liquid supply methods. According to different working strokes, the struts are divided into single telescopic (single stroke) struts and double telescopic (double stroke) struts. According to the different materials used, the pillars are divided into steel pillars and light alloy pillars.zmwm221. Piston-type single hydraulic prop(1) Internal injection unit hydraulic pressure columnThe inner-injection type single hydraulic prop relies on the internal liquid circulation of the prop to support the top plate under the action of manpower. It is mainly composed of top cover, breather valve, safety valve, live cylinder, oil cylinder block, strut piston, crank slider mechanism and other parts.The internal injection type single hydraulic prop includes three processes of lifting the column and supporting it, loading, and unloading the column. However, due to the complex structure of the pillars, high maintenance and repair costs, high labor intensity, and high production costs, the usage is gradually decreasing.(2) External injection type single hydraulic propThe external injection type single hydraulic prop is used to support the roof under the action of the pressure liquid provided by the emulsion pump station on the working face.The external injection type single hydraulic prop structure is mainly composed of top cover, extension section, arc welding seam, three-purpose valve, column head, arc welding seam, handle body, movable column, oil cylinder, return spring, piston, base and so on.2. Suspended single hydraulic propThe suspended single hydraulic prop is a new type of external injection single hydraulic prop developed at the end of the 20th century. The structure of column head and no piston has the characteristics of large working stroke, wide range of use, strong anti-eccentric load capacity, safe and reliable use, etc., and has obtained good application results in production practice. Suspended single hydraulic props are divided into two categories: single telescopic and double telescopic props.(1) Single telescopic suspension single hydraulic propThe single telescopic suspension single hydraulic prop structure is mainly composed of top cover, suspension cover, movable column, handle valve body, oil cylinder, return spring, base, three-purpose valve and other components. Including the process of lifting the column and initial support, loading, unloading and returning to the column, the control of the column is completed by the three-purpose valve.(2) Double telescopic suspension single hydraulic propDouble telescopic suspension single hydraulic prop is mainly composed of top cover, suspension cover, movable column, sleeve cylinder, handle valve body, oil cylinder, middle cylinder, return spring, base, three-purpose valve and other components.Product ParametersModelDN06DN08DN10DN12DN14DN16DN18DN20DN22Max Height mm6508001000120014001600180020002240Min Height mm51059070085010001100120013901540Working Limit mm140±10210±10300±10350±20400±20500±20600±20610700Rated Working Resistance kN250 300 Rated Working Pressure MPa49 46.3 Cylinder Inner Dia mm80 90 Initial Support kN49 68.7-78.5 Base Area cm2120 Max. Torque On Handle N.m<200 Increase Height per Handle Shake mm≥12 ≥20 Down Prop Seed mm/s>20 >30 Working Medium5# hydraulic oil 5#Hydraulic oil Weight kg232629343841455560 ModelDN25DN28DN31.5DN35DN38DN40DN42DN45Max Height mm25002800315035003800400042004500Min Height mm18002100245028003100330035003800Working Limit mm700 Rated Working Resistance kN250 160 150 Rated Working Pressure MPa39.3 25.1 15.7 Cylinder Inner Dia mm90 110 Initial Support kN68.7-78.5 Base Area cm2120 147 Max. Torque On Handle N.m<200 Increase Height per Handle Shake mm≥20 Down Prop Seed mm/s>30 Working Medium5#Hydraulic oil Weight kg687478869195113119 Detailed PhotosOur Advantages
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