Production method of ball valve core

Abstract

The invention provides a method for producing the core of a ball valve, which belongs to the technical field of valve production, and solves the problems of a large amount of material, high cost and high defective rate in the prior art. The production method of the core of the ball valve is realized through the following steps: firstly, an outer ball shell is produced; secondly, an inner straight pipe is installed; and thirdly, surface treatment is carried out. Through the production method, the material is greatly saved, and the cost for the core of the ball valve is reduced; the precision, the thickness and the integrity of the produced core of the ball valve can be guaranteed, and the intensity of the valve handle connecting seat and the valve handle connecting part is enhanced; the reliability of the production method is good, and the rate of finished products is high; the technological process of the production method is simplified, the appearance of the produced core of the ball valve is beautiful, and the core is comparatively perfect; if stainless steel material is selected to produce the core of the ball valve, galvanization is not needed, therefore, the environment protection property is good.

Description

technical field [0001] The invention relates to a method for manufacturing a valve core, in particular to a method for manufacturing a ball valve core, and belongs to the technical field of valve manufacturing. Background technique [0002] Valves are widely used in modern society. Especially in the technical field of plumbing pipe fittings, there are many kinds of valves in the prior art, mainly ball valves, angle valves, globe valves, etc., wherein the structure of the ball valve is relatively simple, mainly because the spool of the ball valve is relatively simple. The spool of the ball valve has a symmetrical spherical structure as a whole, with a cylindrical through hole in the middle, and a stem groove connected to the valve stem at the center of the outer spherical surface of the spool. When working, it rotates The valve stem aligns the cylindrical through hole of the spool with the inlet and outlet of the ball valve, and when it stops working, reversely turns the val...

AI Technical Summary

Problems solved by technology

Although the ball valve spool produced by the above method is better in water resistance and sealing than the ball valve spool produced by foundry casting, and saves materials; For circular seam welding, it is necessary to ensure that the pipe wall will not be broken down by the current and the welding itself must have enough padding material, so the metal pipe material used for the inner straight pipe is thicker, and the cost is relatively high; after welding, because the welding point is just on the sealing surface, Using this method, after the product is processed, defects such as virtual welding, air holes, and insufficient fillers are found to form depressions. Since there is no machining allowance on the surface, it cannot be remedied, so the processing technology is extremely unreliable and the defective rate is high.

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