Zero-pressure opening type remotely-controlled float valve

Abstract

The invention relates to a zero-pressure opening type remotely-controlled float valve, comprising a main valve and a control valve, wherein the main valve comprises a valve body, a valve seat, a valve disk, a valve rod and a valve cover; and the control valve is communicated with a main valve control room. The zero-pressure opening type remotely-controlled float valve is characterized in that a zero-pressure opening device composed of a pull rod, a lower spring seat, an upper spring seat, a spring and a setting nut is arranged on the upper end of the valve rod; the lower end of the pull rod is fixedly connected with the upper end of the valve rod; the center of the lower spring seat is fixedly and hermetically installed on the valve cover after penetrating the pull rod and matched with the pull rod in a motive seal manner; the upper spring seat is fixedly installed on the pull rod via the setting nut; and the spring is installed between the lower spring seat and the upper spring seat. The zero-pressure opening device has the advantages of overcoming the dead weights of the valve disk and the valve rod of the main valve to ensure that the valve disk of the main valve is in a normally open state and still supplying water to a water-supplying object under the condition of a medium pressure of lower than 0.05Mpa so that the control functions of opening the system under a zero pressure and supplying the water under a low pressure are fulfilled. The zero-pressure opening type remotely-controlled float valve is a control valve suitable for the water level of a water tank, a pool and a water tower.

Description

technical field [0001] The invention relates to the field of valves, in particular to a remote control float valve. The invention is suitable for controlling valves of water levels of water tanks, pools and water towers. Background technique [0002] For example, the electric remote control float valve with patent number ZL200920117933.3 includes main valve, solenoid pilot valve, float switch, control pipeline and control valve. The main valve includes valve body, disc and control room. The inlet channel of the main valve is connected with the electromagnetic pilot valve, mainly because the float switch is a lifting structure, and a float pilot valve is connected in series at the outlet of the electromagnetic pilot valve. It has the advantages of large water level control range, adjustable, and automatic power-off control. Suitable for water level control of water towers and water tanks. Its main disadvantage is that the disc of the main valve is opened by the medium pres...

AI Technical Summary

Problems solved by technology

Its main disadvantage is that the disc of the main valve is pushed to open by the medium pressure in the inlet pipeline of the main valve. When the medium pressure in the inlet pipeline of the main valve is lower than 0.05Mpa, the main valve cannot be opened and the control function is lost.

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