Full-channel self-sealing butterfly type spherical valve

Abstract

The invention provides a full-channel self-sealing butterfly type spherical valve which comprises a valve body, an upper shaft, a lower shaft, a butterfly wing valve element, a wing frame and a floating sealing pair. The butterfly wing valve element is arranged in a rotary shell body inside the valve body. The wing frame is used for fixing the butterfly wing valve element. When the valve is opened at 90 degrees, the middle of the spherical wing frame and the middle of the butterfly wing valve element are attached to the inner side of the valve body, the two ends of the butterfly wing valve element are attached to the wall of a pipe, a fully-communicated channel is formed through the side wall of a pipe space, so that media flow without being blocked, the head loss coefficient of flow resistance is lower than 0.035, and the energy-saving benefits are good. When the valve is closed, on one hand, large pressure is exerted on the butterfly wing valve element by fluid, so that the floating sealing pair is tightly pressed by the butterfly wing valve element and self sealing is achieved; on the other hand, due to the compensation function of gradually eccentric rotation of the floating sealing pair and butterfly wings, the floating sealing pair is automatically pushed to tightly press the butterfly wing valve element, the abrasion of the butterfly wing valve element or a sealing ring is compensated, the sealing problems caused by other reasons are solved, and the service life of the full-channel self-sealing butterfly type spherical valve is prolonged.

Description

technical field [0001] The invention relates to the field of valves, in particular to a full-channel self-sealing butterfly spherical valve. Background technique [0002] 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. It is compact and simple in structure, reliable in sealing, and convenient in maintenance. The sealing surface and spherical surface are always in a closed state, which is not easy to be eroded by the medium, easy to operate and maintain, suitable for general working media such as water, solvent, acid and natural gas, and also suitable for work Media with harsh conditions, such as oxygen, hydrogen peroxide, methane and ethylene, are widely used in various industries, but their processing precision is high, the cost is expensive, and it is not easy to use in high temperature. If there are impurities in the...

AI Technical Summary

Problems solved by technology

Its structure is compact and simple, reliable sealing, easy maintenance, sealing surface and spherical surface are always in a closed state, not easy to be eroded by the medium, easy to operate and maintain, suitable for general working media such as water, solvent, acid and natural gas, and also suitable for work Media with harsh conditions, such as oxygen, hydrogen peroxide, methane and ethylene, are widely used in various industries, but their processing precision is high, the cost is expensive, and it is not easy to use in high temperature. If there are impurities in the pipeline, it is easy to be blocked by impurities. prevent the valve from opening

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