Acrow prop is a kind of (external injection type) monolithic support equipment newly developed by the Institute of Mining Machinery of China University of Mining and Technology. It is a replacement product of DZ type (piston type) acrow prop. These specifications are applicable to coal seams with a height of 0.63-4.5 meters.
Generally, the coal mining face with a gently inclined mining angle of less than 25 degrees. The DWX (suspended) acrow prop can be used on the same working surface as the DZ (piston)acrow prop support.
DWX (suspended) acrow prop overcomes the defects and problems such as weld fracture and internal leakage of the (piston type) acrow prop currently used at home and abroad. In terms of technical principles, structure, performance, safety, and environmental protection, creative improvements have been made.
For a large working surface where the top plate sinks, the DWX acrow prop can still meet a large constant increase in resistance and drop distance, facilitate the return to the acrow prop, improve the pillar recovery rate, and reduce acrow prop consumption and production costs.
At present, the acrow props at home and abroad, due to the existence of internal leakage, cause the acrow props to be falsely topped, and even cause the acrow props to fall automatically and cause injuries. And all sealing points of DWX type acrow props are peripherals, which can be visually inspected with the naked eye. Once the acrow props leak, you can inject liquid or replace the acrow props at any time, ensuring the safety and reliability of the roof support of the coal mining face.
DWX type acrow prop has no stigma, no piston and no arc welding seam, which simplifies the process of acrow prop structure and improves safety. Both the movable column and the oil cylinder are of integral structure, with high strength and good stability.
