A semi-contact sealed ball valve

A sealing ball valve, semi-contact technology, applied in the shaft seal, valve details, valve device, etc., can solve the problems of quick response, spherical surface corrosion, single structure, etc., to ensure reliable sealing, increase the extrusion area, and prolong the service life The effect of longevity
CN105972241BActive Publication Date: 2018-05-11KUSN WEISA VALVE
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Patent Information

Authority / Receiving Office
CN ยท China
Patent Type
Patents(China)
Current Assignee / Owner
KUSN WEISA VALVE
Publication Date
2018-05-11

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Abstract

The invention discloses a semi-contact type sealing ball valve which comprises a valve body (1), valve seats (2) and a ball body (3). A fluid channel (4) is arranged in the valve body (1). The two opposite valve seats (2) are arranged on the fluid channel (4). The ball body (3) is arranged between the two valve seats (2) in a sealed manner. The surface of the ball body (3) is a non-continuous ball surface. The non-continuous ball surface comprises first ball surface bodies (5) located on the inner rings of sealing lines of the valve seats (2), and second ball surface bodies (6) making contact with the sealing lines of the valve seats (2) and having a sealing effect. The diameter of the first ball surface bodies (5) is smaller than the diameter of the second ball surface bodies (6). By means of the semi-contact type sealing ball valve, damage of corrosive media and media likely to be crystallized to the ball valve can be extremely effectively removed, and the service life of the valve is greatly prolonged.
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Description

technical field

[0001] The invention relates to a semi-contact sealed ball valve, in particular to a small-diameter metal hard-sealed floating ball valve, which belongs to the technical field of ball valves. Background technique

[0002] As we all know, the main function of the ball valve is to cut off or connect the fluid channel in the pipeline. Its working principle is very simple. A certain torque is applied to the upper end of the stem with the help of a handle or other driving device and transmitted to the ball to make it rotate 90 ยฐ (except for other special requirements), the through hole of the ball coincides with or is perpendicular to the center line of the valve body channel, and the ball valve completes the fully open or fully close action. The ball valve has developed into a main valve type due to its characteristics of small fluid resistance, fast switching, flat and smooth passage in the valve body, etc. It has been widely used in aerospace, petroleum, chemic...

Claims

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