Switching device for electric and manual actuating mechanisms of nuclear drum vacuum valve

Abstract

The invention belongs to the technical field of nuclear vacuum valves, and in particular relates to a switching device for an electric manual actuator of a nuclear drum vacuum valve. The large gear, the retaining ring for the second shaft, the front coupling sleeve, the retaining ring for the first shaft, the spring, the spring seat, the two half washers, the rear coupling sleeve, and the handwheel are installed on the worm shaft in sequence from the back to the front The diameter of the worm shaft decreases in three stages from front to back; the retaining ring for the second shaft is embedded in the shaft groove of the second stage of the worm shaft, and the front coupling sleeve passes through the retaining ring for the first shaft, the spring, the spring seat and the two halves The washer and the large gear realize axial positioning, and realize forward and backward movement through the expansion and contraction of the spring. The two half washers are embedded in the third-level shaft groove of the worm shaft; the rear coupling sleeve is connected with the hand wheel and positioned on the gearbox. After being connected with the shaft, it is positioned in the gearbox, and connected with the shift fork through the set screw, and the shift fork is connected with the slider through the pin shaft. The invention improves the reliability of the nuclear vacuum valve on the basis of ensuring the degree of automation of the nuclear vacuum valve.

Description

technical field [0001] The invention belongs to the technical field of nuclear vacuum valves, and in particular relates to a switching device for an electric manual actuator of a nuclear drum vacuum valve. Background technique [0002] Nuclear drum vacuum valves are mainly used to cut off and circulate gaseous materials in the cascade unit system. Because the materials are highly hazardous and expensive, the actuators of the opening and closing valves are required to have a high degree of automation and reliability. In the past, electric manual execution The mechanism switching device has a relatively complex structure and poor reliability. Contents of the invention [0003] The purpose of the present invention is to provide a switching device for an electric and manual actuator of a nuclear drum vacuum valve, which improves its reliability on the basis of ensuring the automation of the nuclear vacuum valve. [0004] In order to achieve the above object, the technical sch...

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Problems solved by technology

[0002] Nuclear drum vacuum valves are mainly used to cut off and circulate gaseous materials in the cascade unit system. Because the materials are highly hazardous and expensive, the actuators of the opening and closing valves are required to have a high degree of automation and reliability. In the past, electric manual execution The structure of the mechanism switching device is relatively complex and the reliability is poor

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