Boost Valve for a Concrete Transfer Pump Lubricating System

摘要

A boost valve for a concrete pump lubricating system is provided. The boost valve includes a valve body 1, a valve core 2, and a spring 3. An axial section of the valve core 2 is -shape, and a rear cylinder 22 of the valve core 2 is connected to a check valve 21; a front valve cavity 15 of the valve body 1 is connected to a check valve 13, and an air orifice 12 and a grease distributing orifice 11 are opened in the valve body 1. When a pressure of an outlet is lower than a pressure of an inlet, lubrication grease is discharged from check valves (21, 13); when the pressure of the outlet is higher than that of the inlet, the lubrication grease pushes the valve core 2 to move rightwards, and the lubrication grease in the cavity 15 is pressurized and then discharged from the check valve 13; when the valve core 2 moves rightwards to pass the grease distributing orifice 11, the lubrication grease at. the inlet is discharged from the grease distributing orifice 11; when the grease is stopped supplying from the inlet, the spring 3 pushes the valve core 2 to restore an original position, so as to supply the grease to the booster cavity 15 from the check valve 21. The above features are helpful for improving the reliability and reducing the maintenance cost of the lubricating system.