First, use
It is to prevent column or jack overload, ensure the weight of the support and constant resistivity.
Second, the implementation of the standard MT419-1995 "hydraulic support valve"
When the roof pressure exceeds the working resistance of the support, the studio is released at night, which not only guarantees a constant working pressure, but also acts as overload protection. When the liquid pressure does not reach the rated release pressure, it is a normally closed valve, and a sealing effect is used.
Third, the working principle
Mine safety valve is a kind of safety protection valve, which is normally closed due to external force. When the medium pressure of the closed system increases, it automatically opens when the safety valve specifies the value, and the medium is discharged into the system to reduce the system pressure to prevent damage to the medium high pressure system in the system.
Fourth, explain
1 The valve is used for 31.5MPa hydraulic system, branch pipeline hydraulic system, the working medium is mixed emulsion and 95% neutral water mixed, can work normally at 10℃-50℃, need to clean the media, no impurities. Filter with 0.125 mm precision filter and magnetic filter unit.
2 The valve is replaced by an integral replacement downhole and cannot be disassembled downhole to prevent stolen goods from entering the valve chamber.
Five, the shop
1 When storing the mine safety valve, the liquid in the cell should be removed, cleaned and cleaned, and low-density anti-rust hydraulic oil should be applied.
2 At the same time, the plastic plug is plugged and placed in a clean place.
