Study on the dynamic characteristic of the controllable gate valve in the mine automatic draining system

Based on the questions of screw- nut transmission electric gate valve used in automatic drainage system, it is put forward the research method of dynamic characteristic for the hydraulic controllable gate valve. The power keys diagran model has been built for the hydraulic controllable gate valve to research the opening,closing performance and dynamical load response characteristic of the hydraulic pressure controllable gate valve under different hydraulic pressure. The paper reveals the influence of the warter pressure change, the variation of load and the viscous-damping on the hydraulic pressure controllable gate valve dynamic characteristic. And the rules for the correct design on the gate valve used in automatic draining water is provided.