Normally-opened and normally-closed type electric control valve

Abstract

Provided is a normally-opened and normally-closed type electric control valve. The normally-opened and normally-closed type electric control valve comprises a valve cavity body and a valve element, wherein the valve element is connected with a valve element rotary shaft, the other end of the valve element rotary shaft is connected with a motor, a return spring is sleeved on the periphery of the valve element rotary shaft, a section of semi-cylindrical rotary shaft outer small teeth is arranged on the outer side of a semi-circle, tightly close to the return spring, of the valve element rotary shaft, the height of the section of semi-cylindrical rotary shaft outer small teeth is 3cm, a semicircle plate is arranged on the outer side of the section of semi-cylindrical rotary shaft outer small teeth, a section of semicircle plate inner small teeth is arranged on the inner side of the semicircle plate, the height of the section of semicircle plate inner small teeth is 4cm, the semicircle plate inner small teeth are matched with the rotary shaft outer small teeth, two ends of the semicircle plate are respectively connected with a sliding rod, and the sliding rods penetrate through holes formed in two ends of a sliding rod sleeve rod fixed on a sliding rod sleeve rod support, and are connected with a sliding rod fixing rod. The normally-opened and normally-closed type electric control valve is characterized in that a permanent magnet block is arranged on the sliding rod sleeve rod support, an electromagnetic coil is arranged in the center of the sliding rod fixing rod, magnetic attracting blocks are arranged on two sides of the electromagnetic coil, the direction of a magnetic field produced by the electromagnetic coil after the electromagnetic coil is energized is opposite to the direction of a magnetic field of the permanent magnet block, and a control module for controlling the motor controls the electromagnetic coil to be energized or interrupted.

Description

technical field [0001] The invention relates to a normally open or normally closed electric regulating valve, which belongs to the technical field of valves and valve control. Background technique [0002] Electric control valves are widely used in the chemical industry, but when these electric control valves encounter a sudden power failure, they can only go to the site to manually open or close the electric valve to ensure safety, which is very dangerous for the manual operators who go to the site! And there is not a kind of electric regulating valve that can automatically open or close when running into a sudden power failure on the market. Contents of the invention [0003] The purpose of the present invention is to provide a normally open or normally closed electric control valve that can be automatically opened or closed when a sudden power failure occurs. [0004] A normally open or normally closed electric control valve, including a valve cavity and a spool insta...

AI Technical Summary

Problems solved by technology

[0002] Electric control valves are widely used in the chemical industry, but when these electric control valves encounter a sudden power failure, they can only go to the site to manually open or close the electric valve to ensure safety, which is very dangerous for the manual operators who go to the site! And there is no electric regulating valve that can automatically open or close when encountering a sudden power failure on the market.

Images