What Is The Condition Analysis Of The Single Hydraulic Props Forming The Expansion Cylinder?
Date:2018-10-23 Label：
Hydraulic Prop
Single Hydraulic Prop
Acrow Prop
In general, the cylinder can be deformed or even damaged only if the cylinder is pressed and reaches or exceeds the strength limit of the cylinder. It is first necessary to analyze the conditions for the rolling of the cylinder, that is， the conditions for forming the expansion cylinder.
Take the
DW type single hydraulic prop as an example. In work, the emulsion pumping station installed in the wind tunnel of the working face is transported to the working fluid distributed on the working surface through the pipeline system. The high-pressure liquid is injected into the lower chamber of the single hydraulic prop through the three-purpose valve by the liquid injection gun to complete the lifting operation. When the operator opens the check valve in the three-way valve with the unloading handle, the working fluid of the pillar inner cavity is sprayed into the gob through the valve barrel, the stud 3 is retracted by its own weight and the return spring to achieve a lowering of the unit hydraulic strut.
When the working surface is affected by the mining, when the top plate is pressed, the resulting lower pressure of the pillar is greater than the rated working pressure of the three-way valve (the product design setting pressure). The safety valve in the three-way valve opens the overflow and closes when the pressure is released to the closed pressure. This cycle ensures that the
single hydraulic pros have constant resistance operating characteristics.
