CONTROL VALVE SYSTEM INSTALLED IN AN OUTLET OF A DEEP WELL PUMP FOR DISCHARGING AIR AND FOREIGN MATTERS SUCH AS SAND OUT OF A PIPE IN STARTING A PUMP

摘要

PURPOSE: A control valve system for a deep well pump is provided to prevent surge in pipe line in starting and stopping the pump, to supply water stably and to minimize impact in driving and stopping the pump frequently by regulating the opening and closing speed of the passage independently. CONSTITUTION: A control valve system for a deep well pump is composed of a check valve(100) composed of an inlet(110) connected to an outlet of a pump in series and an outlet(120) and divided into an upper chamber and a lower chamber by a diaphragm to selectively regulate the passage between the inlet and the outlet according to pressure difference to the upper chamber and the lower chamber, a control valve(200) composed of an inflow port connected to the passage between the outlet of the pump and the inlet of the check valve and a discharge port(220) and divided into an upper chamber and a lower chamber by a diaphragm to selectively to selectively adjust the passage between the inflow port and the discharge port according to pressure difference to the upper chamber and the lower chamber, and first and second solenoid valves(300,400) formed in fourth and fifth auxiliary passages and selectively opened or closed by a controller(800) to switch the passage.