Hydraulic Roof Supports Acrow Prop Adjustable Props

• After-sales Service: Online Video Services
• Warranty: 1 Year
• Certification: CE
• Shipping Cost: Estimated freight per unit.: about shipping cost and estimated delivery time.
• Currency: US$
• Return&refunds: You can apply for a refund up to 30 days after receipt of the products.
• Model NO.: DN
• Standard: GB
• Surface Treatment: Single Hydraulic Prop
• Manufacturing Process: Single Hydraulic Prop
• Material: Single Hydraulic Prop
• Model: DN25
• Max Height (mm): 2500
• Min Height (mm): 1800
• Working Limit mm: 700
• Rated Working Resistance Kn: 250
• Rated Working Pressure MPa: 39.3
• Cylinder Diameter (mm): 90
• Base Area (mm*2): 120
• Weight (Kg): 68
• Transport Package: Export Standrad Package
• Trademark: zhongmei
• Origin: Jining City, Shandong Province, China
• Production Capacity: 1000 Sets Per Month

Product Description

Wholesale Price Coal Mining Durable And Low Loss DN20 DN24 Hydraulic Acrow Props

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Product Description

Introduction of Wholesale Price Coal Mining Durable And Low Loss DN20 DN24 Hydraulic Acrow Props

Single 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.zmwm20
1. Piston-type single hydraulic prop
(1) Internal injection unit hydraulic pressure column
The 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 prop
The 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 prop
The 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 prop
The 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 prop
Double 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.

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Product Parameters

Parameters of Wholesale Price Coal Mining Durable And Low Loss DN20 DN24 Hydraulic Acrow Props

 

Model	DN06	DN08	DN10	DN12	DN14	DN16	DN18	DN20	DN22
Max Height mm	650	800	1000	1200	1400	1600	1800	2000	2240
Min Height mm	510	590	700	850	1000	1100	1200	1390	1540
Working Limit mm	140±10	210±10	300±10	350±20	400±20	500±20	600±20	610	700
Rated Working Resistance kN	250							300
Rated Working Pressure MPa	49							46.3
Cylinder Inner Dia mm	80							90
Initial Support kN	49				68.7-78.5
Base Area cm2	120
Max. Torque On Handle N.m	<200
Increase Height per Handle Shake mm	≥12				≥20
Down Prop Seed mm/s	>20				>30
Working Medium	5# hydraulic oil
	5#Hydraulic oil
Weight kg	23	26	29	34	38	41	45	55	60

 

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