Machining technology for sphere of ceramic sealing spherical valve and sealing spherical valve

Abstract

The invention discloses a machining technology for a sphere of a ceramic sealing spherical valve and a sealing spherical valve. The machining technology comprises the following steps that a metal zirconium blank is machined into the sphere and a valve seat in the needed shapes; zirconium dioxide (ZrO2) ceramic adhering layers are formed on the outer surfaces of the sphere and the valve seat by adopting a micro-arc oxidation technology; the sphere is installed in a sphere grinding machine, and the sphere center position is aligned; the sphere is coarsely ground by adopting a diamond grinding wheel; and the valve seat is installed on a valve seat tool and ground in a pairing mode with the sphere. According to the machining technology for the sphere of the ceramic sealing spherical valve, ceramic treatment is conducted on the surfaces of the sphere and the valve seat by adopting the micro-arc oxidation technology, the portions with micro holes on the surfaces of the ceramic adhering layers are ground off through grinding and pairing grinding, therefore, the sealing surfaces of the sphere and the valve seat achieve the ultrahigh roundness and smooth degree, and the sealing property ofthe valve can completely meet the standard requirements; and the technology has the advantages that the technological steps are simple, the production equipment cost is low, and the production cost islow.

Description

technical field [0001] The invention relates to the technical field of industrial valves, in particular to a ball processing technology of a ceramic sealing ball valve and the sealing ball valve. Background technique [0002] At present, the service life of sealed ball valves is generally short, and its main failure forms are wear, erosion, cavitation, oxidation and corrosion. For the petrochemical industry, the intrusion of tiny hard particles in the fluid into the sealing surface is likely to produce a plowing effect, resulting in scratches, pad damage and abrasive wear on the sealing surface, while corrosive media will accelerate failure. The harsh working environment puts forward higher requirements on the wear resistance and corrosion resistance of the ball and valve seat of the ball valve, especially the gas-solid, liquid-solid or three-phase mixed medium wears the sealing surface of the ball valve very seriously, which can easily cause the sealing surface Leaks from ...

AI Technical Summary

Problems solved by technology

[0007] Therefore, the technical problem to be solved by the present invention is to overcome the defects of complex ball processing, time-consuming and high production cost of the hard-sealed ball valve in the prior art, thereby providing a ceramic ball valve with simple process, short time-consuming and low production cost. Ball processing technology of chemical sealing ball valve

[0008] Another technical problem to be solved by the present invention is to overcome the defect that the sealing surface of the sealed ball valve in the prior art is extremely worn, which can easily cause leakage due to excessive wear or scratches on the sealing surface, thereby providing a ceramic seal ball valve

Images