Analysis and Application of a New Type of Cut-Off Unloading Valve for Hydraulic Supports
The previous self-locking spherical shut-off valve of hydraulic support in underground face of Sihe coal mine has no unloading function for downstream pipeline and it is easy to cause safety accidents.A new type of shut-off and unloading valve for hydraulic support is designed,which can realise the dual functions of liquid inlet shut-off and synchronous unloading.The structure,working principle,characteristics and performance of the valve are analysed and elaborated,and it is applied in 5312 working face,which can effectively achieve the function of liquid inlet cut-off and unloading,and the safety and economic benefits are remarkable.
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