Double-aperture adjustable slow-closure control valve for water pump

Abstract

The invention relates to a double-aperture adjustable slow-closure control valve for a water pump, which comprises a main valve and a control device. A diaphragm and a spring are arranged between a valve body and a valve cover, wherein a console cabinet is arranged between the diaphragm and the valve cover and the console cabinet is provided with an inlet connecting pipe and an outlet connecting pipe connected with the inlet and the outlet of the valve body respectively. The invention is characterized in that the inlet connecting pipe is provided with a normally open first electromagnetic valve and the outlet connecting pipe is provided with a normally open second electromagnetic valve and a normally closed third electromagnetic valve. By the control of three electromagnetic valves to the main valve, a closing valve of the water pump starts, a main valve undergoes a double-aperture control, and the main valve realizes two closing stages control such as quick-closure and slow-closure. The invention has the advantages of energy saving, flow regulation and two-level flow outlet, elimination of a water hammer and the like. The invention is used for the outlet pipe control for water pump of water supply system in fire fighting and architecture.

Description

technical field [0001] The invention relates to a valve, in particular to a water pump control valve. The invention is suitable for the control valve of the outlet pipe of the water pump in the fire protection and building water supply system. Background technique [0002] In the water pumping station piping system of fire protection, building and other water supply systems, in order to improve the safe operation of the pump, a control valve is generally installed at the pump outlet to achieve slow closing and slow opening, eliminate water hammer, and prevent medium backflow. There are many types of water pump control valves, such as the multifunctional water pump control valve with patent number 00224979.0, including valve body, valve seat, valve stem, main valve plate, diaphragm, diaphragm pressure plate, pressure plate fastening nut assembly and valve cover, etc. , there is a diaphragm seat between the valve cover and the valve body to form a double-chamber diaphragm con...

AI Technical Summary

Problems solved by technology

However, this kind of control valve opens at the same time when the water pump is turned on, and the starting power consumption of the water pump is large, and it cannot control and adjust the medium pressure of the outlet pipeline of the main valve, let alone control the flow value of the main valve to output two levels.

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