Power-assisted two-way sealed track ball valve

Abstract

This invention discloses a booster two-way seal track ball valve, which comprises one valve, one ball valve core, one valve bar, wherein the valve core is located in the hollow chamber of the valve and the valve is located with hollow chamber, first side chamber and second chamber and the valve front is located with above three chambers leading to three side paths. When the medium pressure comes from first side chamber, the valve gate connects the second side chamber and hollow chamber through direction valve and is aided by the medium pressure inside pipe and pushes the left sphere is isolated from the first side chamber valve socket and realizes the easy start under the action of the simultaneous lever.

Description

technical field [0001] The invention relates to a ball valve, in particular to a power-assisted bidirectional sealing track ball valve which can effectively prevent leakage and can be easily opened and closed. Background technique [0002] Ball valve is the most common type of valve used on pressure pipelines. It uses a ball with a circular through hole as the opening and closing part. The ball rotates with the valve stem to realize the opening and closing action of the valve. and other fields have a wide range of applications. The closing part of the ball valve is a sphere or a part of the sphere with a hole, so among all kinds of valves, the flow resistance of the ball valve is the smallest. When a ball valve is used, it is equivalent to flowing through a straight-through pipe, and the medium can pass through almost without loss; the ball valve opens and closes quickly, and it can be fully closed and fully opened by turning the ball 90° when opening and closing; the ball ...

AI Technical Summary

Problems solved by technology

Floating ball valves rely on medium pressure to press the sphere onto the valve seat at the outlet end, and its operating pressure and diameter will be limited to a certain extent. Although it has a simple structure and low cost, it has a large opening and closing force, and there is no support under the ball. Easy to wear, generally only suitable for small-diameter ball valves, not for large-diameter ball valves; the ball of the fixed ball ball valve is supported by the upper and lower bearings installed on the valve body, the position of the ball is fixed, and the ball is in the shaft sleeve. Internal rotation, it relies on the valve seat to perform axial sliding seal after being pressed. Whether it is a floating ball valve or a fixed ball valve, the ball is always in contact with the valve seat, which causes the disadvantages of large switching torque and easy wear of the sealing surface; The orbital ball valve can achieve no friction at all during the opening and closing process. When the ball valve is opened and closed, it uses the inclination at the end of the valve stem to move the ball, so that the ball leaves the sealing surface of the valve seat, and then rotates to open. The ball is separated from the valve seat, so there is no friction between the valve seat and the ball, the service life is long, and the opening and closing torque is small, and the operation is easy. Large opening force, especially for large-diameter valves, the opening force is much larger, and the phenomenon of breaking the track pin often occurs, and it cannot bear the same rated pressure in both directions

Images