High pressure difference multi-stage pressure reducing regulating ball valve

Abstract

High pressure difference multi-stage decompression regulating ball valve, the ball valve includes a valve body, a ball, a valve stem, the ball is set in the valve body, the left and right sides of the valve body are respectively provided with an inlet valve seat and an outlet valve seat, and a cavity is opened on one side of the ball A replaceable throttling assembly is arranged in the cavity, and a plurality of groups of through holes penetrating the sphere are arranged on the inner wall in the length direction of the cavity. The throttling assembly includes a plurality of independent channels, each independent channel and each group of through holes form an independent fluid channel, the fluid channel is divided into several sections, and along the direction of fluid flow, the minimum cross-sectional area of ​​the fluid channel in adjacent sections gradually changes Large or unchanged. The invention can realize multi-stage decompression and noise reduction through the throttling assembly arranged in the cavity, and the throttling assembly can be replaced, which can be applied to different working conditions and reduces the difficulty of maintenance. The setting of independent fluid channels can adapt to high pressure Under the condition of poor working conditions, the precise adjustment of flow / pressure can be realized.

Description

technical field [0001] The invention relates to the technical field of regulating valves, in particular to a high-pressure differential multi-stage decompression regulating ball valve. Background technique [0002] Ball valves are widely used in long-distance pipelines, electric power, water conservancy and other industries, and occupy a pivotal position in the national economy. The ball valve is mainly used to cut off, distribute and change the flow direction of the medium in the pipeline. It only needs to be rotated 90 degrees and a small rotational torque can be closed tightly. Ball valves are most suitable for on-off and shut-off valves, but in recent years more and more ball valves have been used for regulating purposes. [0003] There are many restrictions on the direct use of ball valves with ordinary structures as regulating valves, for example: it should be avoided to be used under the condition of small opening; it cannot be used in high pressure differential cond...

AI Technical Summary

Problems solved by technology

[0003] There are many restrictions on the direct use of ball valves with ordinary structures as regulating valves, for example: it should be avoided to be used under the condition of small opening; it cannot be used in high pressure differential conditions, etc.

Even for the V-type regulating ball valve, which has a high adjustable ratio and can adapt to media containing fibers, tiny solid particles, slurry, etc., it still cannot solve the problem of adaptability to high pressure differential conditions

[0004] In order to deal with the adaptability of the regulating ball valve under the condition of high pressure difference, technicians in the industry have proposed various technical solutions, but the multi-stage pressure-reducing / noise-reducing regulating ball valve in the prior art is still generally difficult to process and difficult to maintain , poor adaptability to working conditions, etc.

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