Mine pump automatic unloading hydraulic control valve assembly

Abstract

The invention discloses a mine pump automatic unloading hydraulic control valve assembly, which comprises a guide cylinder body, a pilot piston, an unloading valve block, a liquid inlet joint body, a one-way valve core, a one-way valve seat, a water return valve block, a water return hole, an unloading valve core, a disc spring, a pressure regulating screw bolt, a disc spring chamber and the like. High-pressure liquid transmits pressure to an executing element through the one-way valve seat via the liquid inlet joint body, and the required pressure is achieved; the one-way valve seat stops liquid so that the liquid backflow is prevented, and the required pressure of the executing element is maintained; the pilot piston drives a piston rod to push the unloading valve core under the effect of the guide cylinder, the unloading valve core pushes the disc spring to open an unloading hole under the effect of the liquid supply pressure, and pressure-free water enters the water return valve block through the unloading valve block for unloading. The mine pump automatic unloading hydraulic control valve assembly has the advantages that an automatic unloading function is realized, a pump can realize idle-load operation under the condition of maintaining unchanged pressure of the executing element, the torque of a motor and the pump is reduced, the automatic unloading, energy-saving and emission reduction effects are achieved.

Description

technical field [0001] The invention relates to a mine pump automatic unloading hydraulic control valve assembly, specifically a mine pump that keeps the hydraulic system pressure of the actuator constant during the working process; the pilot piston drives the piston rod to push the unloading valve core to open the bypass , a device that enables the pump to automatically unload and run without load. Background technique [0002] At present, when mining pumps are working underground, the adjustment of the working pressure is controlled by a set of relief valves; when the pressure reaches the set pressure, the relief valve begins to overflow to maintain the pressure balance of the system. At this time, the motor drives The high-pressure pump runs at full load while maintaining the set pressure of the system. The torque of the motor and the pump is large, the temperature rise is high, the power consumption is high, energy is wasted, and the service life of the motor and the pum...

AI Technical Summary

Problems solved by technology

[0003] The present invention solves the problem of "the motor-driven high-pressure pump runs at full load while maintaining the system set pressure, the torque of the motor and the pump is large, the temperature rise is high, the power consumption is high, energy is wasted, and the service life of the motor and the pump is reduced." In order to shorten the series of problems, a mining pump automatic unloading hydraulic control valve assembly is proposed. After the mining pump is installed with the automatic unloading hydraulic control valve assembly, the automatic unloading function releases the pressure to reduce the motor and The torque, temperature rise and power consumption of the pump can save energy and prolong the service life of the pump and motor

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