Dust collection type spherical stop valve

Abstract

The invention provides a dust collection type spherical stop valve. The dust collection type spherical stop valve comprises a valve body, a bonnet, a valve clack, a ball assembly, a valve rod and a hand wheel, wherein the bonnet is connected with the valve body, a valve cavity is formed in the valve body, the valve clack is disposed in the valve cavity, the valve clack is snapped with one end of the valve rod, and the other end of the valve rod extends out of the bonnet to be connected with the hand wheel; the ball assembly is arranged between the valve clack and an outlet; the ball assembly comprises a ball, a positioning sleeve, a ball pad and a seal ring; the ball can float freely, the ball pad is a copper core pad which is positioned between the top of the ball and the valve clack; the positioning sleeve is arranged on the periphery of the ball, the inner circumference of the positioning sleeve is matched with the outer circumference of the ball, and the positioning sleeve is connected with the valve clack; and the seal ring is overlaid on a valve seat in the valve body, and a sealing surface of the seal ring, which corresponds to the ball, is an arc-shaped spherical surface. According to the dust collection type spherical stop valve, the multi-directional ball combination and the arc-shaped sealing surface are adopted, so that the sealing performance is good, the service life is long, and dust-collecting and dirt-removing functions are combined simultaneously.

Description

Technical field [0001] The invention belongs to the field of valves, and specifically relates to a dust-removing spherical globe valve. Background technique [0002] The stop valve is a commonly used valve for cutting off, regulating and throttling pipeline media. The existing globe valve is mainly composed of a valve body, a valve seat, a valve stem and a valve disc. The valve disc is connected to one end of the valve stem and corresponds to the valve seat. Rotating the valve stem makes the valve disc move along the center line of the valve seat. , To achieve the opening between the valve clack and the valve seat. The seal of the traditional globe valve is a conical seal or a plane seal. The conical seal is a linear seal. It has good pressure resistance during use, but the sealing surface is vulnerable and has a short service life. Although the plane seal is not vulnerable, it is Not resistant to high pressure and easy to stain. Summary of the invention [0003] In view of the...

AI Technical Summary

Problems solved by technology

The seal of the traditional globe valve is a cone seal or a flat seal, and the cone seal is a linear seal. It has good pressure resistance during use, but the sealing surface is fragile and has a short service life; although the plane seal is not easy to damage, its Not resistant to high pressure and easy to stain

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