V-type adjusting ball valve

Abstract

The invention relates to a V-type adjusting ball valve. The V-type adjusting ball valve comprises a valve body, a valve seat, a ball core, a sealing part and an axial displacement compensation part, wherein the valve body is provided with a straight through runner; the valve seat is of an annular structure; protruding portions are arranged in the positions, close to the assembled ball core, inside the valve seat in an extending mode; the faces, making contact with the ball core, of the protruding portions are cambered faces; the valve seat can finely move front and back in the valve body; the two protruding portions are arranged in an axial symmetry mode, so that an opening of the valve seat comprises a semi-arc through hole and an adjusting through hole which is provided with the V-shaped cross section and communicates with the semi-arc through hole; in the rotating process of the ball core, a through hole of the ball core and an inner hole of the valve seat form a channel which becomes bigger and then becomes smaller. As the protruding portions are arranged in the positions, close to the assembled ball core, inside the valve seat in the extending mode, the channel has the flow control characteristic. The V-type adjusting ball valve has the beneficial effects of being long in service life, capable of being used on gas etching and scouring occasions, good in sealing performance, high in flow control precision and convenient to machine and manufacture.

Description

technical field [0001] The invention relates to the technical field of valves in industries such as air conditioning, HVAC, water and sewage treatment, and in particular to a V-shaped regulating ball valve. Background technique [0002] The valve is a control component in the fluid delivery system, which has functions such as cut-off, adjustment, flow diversion, reverse flow prevention, pressure stabilization, flow diversion or overflow pressure relief. Valves used in fluid control systems range from the simplest cut-off valves to various valves used in extremely complex automatic control systems, with a wide variety of varieties and specifications. Valves can be used to control the flow of various types of fluids such as air, water, steam, various corrosive media, mud, oil, liquid metal and radioactive media. In some application occasions, it is necessary for the valve to effectively control the medium. The flow characteristic window of the existing valve is guaranteed by ...

AI Technical Summary

Problems solved by technology

Due to the presence of intermittent chips, it is difficult to guarantee the roundness tolerance of the sealing surface of the ball core

[0005] 2. The structure of the hemispherical crown core itself is not uniform. With an irregular structure to control the opening, the core deforms greatly, and the core also shakes during exercise, and the seal is unreliable.

[0006] 3. This kind of ball core has a flow characteristic structure. The ball core is a hollow ball in the structure, and its thickness is generally given according to the designed nominal pressure. However, similar valves generally have requirements for anti-shock and anti-cavitation. The core wall thickness is poor in erosion resistance, and its service life is not long

[0007] 4. The flow characteristic structure on the ball core is generally lower than the sealing surface in design, which makes this structure have the disadvantage of low control accuracy

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