Ball valve spool and production method thereof

Abstract

The invention provides a ball valve core and belongs to the valve technical field. The ball valve core solves the technical problems that the ball valve core is poor in sealing performance, short in service life and high in factory cost in the existing market. The ball valve comprises a hollow outer ball body and an inner straight pipe, wherein a through hole is formed in the interior of outer ball body, cross sections of the upper end and the lower end of the through hole are mutually parallel and equal circles, a notch which penetrates through inside and outside the outer ball body is formed in the outer ball body, and the inner straight pipe is embedded in the through hole of the outer ball body and joint part of the inner straight pipe and the through hole of the outer ball body is tightly abutted. A production method of the ball valve core comprises the following steps: prefabricating the outer ball body and the inner straight pipe; assembling the outer ball body and the inner straight pipe; chipping off the end portion, exposed to the outer ball body, of the inner straight pipe; opening the notch in a big circle of the outer ball body; and conducting polishing treatment on an assembled blank. The ball valve core and the production method of the ball valve are good in sealing performance and long in service life, and lower factory cost of products.

Description

technical field [0001] The invention relates to a valve, in particular to a ball valve core and a production method thereof. Background technique [0002] As we all know, the structure and defects of the current ball valve spool are: first, the bottom of the notch opened on the outer sphere is closed, resulting in waste of materials and increased material costs; second, the connection between the outer sphere and the inner straight pipe is through Welding molding requires chamfering, poor sealing performance, and short service life; third, one end of the inner straight pipe needs to be flanged and fixed on the outer sphere; the second and third points have cumbersome procedures, which directly lead to low work efficiency and increased factory costs. [0003] The current production process of the ball valve core needs to use stamping equipment. The inner straight tube needs to be bored with the inner hole, and the outer sphere is made of a straight tube by expansion technolog...

AI Technical Summary

Problems solved by technology

[0002] As we all know, the structure and defects of the current ball valve spool are: first, the bottom of the notch opened on the outer sphere is closed, resulting in waste of materials and increased material costs; second, the connection between the outer sphere and the inner straight pipe is through Welding molding requires chamfering, poor sealing performance, and short service life; third, one end of the inner straight pipe needs to be flanged and fixed on the outer sphere; the second and third points have cumbersome procedures, which directly lead to low work efficiency and increased factory costs

[0003] The current production process of the ball valve core needs to use stamping equipment. The inner straight tube needs to be bored with the inner hole, and the outer sphere is made of a straight tube by expansion technology. Increased investment in stamping equipment and solder leads to high production costs and many processes, resulting in low work efficiency, and what's more, the products produced are not well sealed and have a short service life

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