The DW single hydraulic prop is a constant resistance prop, which can be matched with various top beams and can also be used as the main post. It can be used for the support of general mechanized coal mining or blasting face in coal mines, as well as the end support or other temporary support of comprehensive mechanized coal mining face.
DW single hydraulic props cooperate with metal hinged roof beams for the end of coal mine mechanized blasting working face and fully mechanized mining face or temporary roof payment. It is suitable for working face with coal seam inclination angle less than 25 °. It can be used in mining face with inclination angle 25 ° --35 °. This series of single hydraulic props have good stability and outstanding technical performance advantages. The height of the single support of the coal mining face is increased from 2.5 meters to 3.5 meters. The coal seam below 3.5 meters can achieve the full height of one-time mining. The coal seam with a thickness of 4.5 meters or less provides working face and advanced support.
Working Principle Of DW Single Hydraulic Prop
DW single hydraulic prop principle
a. DW mining hydraulic props use the working face pump station to inject the working medium into the column through the three-way valve to raise the living column. The top cover contacts with the top beam to maintain a certain initial support pressure to make the single The column is in support working state.
b. When the pressure on the roof of the working face suddenly increases and its pressure exceeds the rated working resistance of the single column, the safety valve in the three-purpose valve will automatically open the drainage to ensure that the single column is constant within the rated working resistance range, so that the pressure on the top plate is evenly distributed On the surrounding single column, the working face support is safe and reliable. When it is necessary to move the column, as long as you turn the load carrying handle, the working fluid in the column will be discharged through the load carrying valve of the three-way valve, and the living column will fall under the action of the internal return spring.
