Device and method for eliminating displacement gap of rotating drum vacuum valve element

Abstract

The invention relates to the technical field of rotating drum vacuum valves and particularly discloses a device and method for eliminating a displacement gap of a rotating drum vacuum valve element. The device comprises gaskets A installed on the upper surface and the lower surface of a cam, and gaskets B installed between a valve base and a valve element assembly, wherein the cam is installed between the upper end of the valve element assembly and a valve body; the stainless steel gaskets A which are the same in diameter and different in thickness are installed between the upper surface of the cam and the contact surface of the valve body as well as between the lower surface of the cam and the upper end contact surface of the valve element assembly, so that a proper gap is reserved between the cam and the valve body as well as between the cam and the valve element assembly; and the stainless steel gaskets B which are the same in diameter and different in thickness are installed between the valve base and the contact surface of the valve element assembly, so that a proper gap can be reserved between the valve base and the valve element assembly. By means of the device and method, by means of verification of 500 times of valve opening and closing action tests of front installation, inverse installation and side installation of valves, the leakage problem, caused by axial displacement of the valve element assembly, of a valve passageway is thoroughly avoided.

Description

technical field [0001] The invention belongs to the technical field of drum vacuum valves, and in particular relates to a device and method for eliminating the movement gap of a drum vacuum valve core. Background technique [0002] The drum vacuum valve used in the uranium enrichment system needs to have a valve core positioning mechanism, whose function is to adjust the position of the valve core assembly and control the axial displacement within a very small range to ensure the sealing of the valve channel. At present, the spool positioning mechanism of small-diameter valves in the system adopts a structural type of screw support and horizontal jacking wire on the cam and valve seat. Due to the small diameter of the valve and the light weight of the valve core assembly, the positioning between the cam and the valve core, the positioning of the cam itself, and the positioning between the valve seat and the valve core do not have high requirements for the installation orient...

AI Technical Summary

Problems solved by technology

[0003] With the increase of uranium enrichment production capacity, the diameter of the pipeline increases, the caliber of the drum vacuum valve increases accordingly, and the weight of the valve core doubles. In addition to the influence of valve vibration, when the valve is installed upside down, only the screws and jacking wires are used to bear the valve. The weight of the core will cause the screw to loosen and cause the valve core to be misaligned and cause valve channel leakage

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