Butterfly valve with sealing protection structure

Abstract

The invention discloses a butterfly valve with a sealing protection structure. The butterfly valve comprises a butterfly valve body, a valve rod and a valve plate, wherein the side edge of the valve plate is provided with a soft sealing layer, the right end of the valve plate is fixedly connected with a protection seat, the left side face of the protection seat adopts an arc-shaped structure, andthe surface of the arc-shaped structure is fixedly provided with a strip-type elastic air bag in a pasted manner, the right side face of the protection seat is provided with a horizontal water inlet hole, the water inlet hole communicates with a slantly-arranged water outlet tank, and the lower end of the water outlet tank is located at the bottom of the protection seat, and the protection seat isfurther internally provided with a transmission mechanism used in coordination with the strip-type elastic air bag. By means of the butterfly valve with the sealing protection structure, fit protection can be automatically performed on the soft sealing layer at the side edge of the valve plate when the valve plate is opened to prevent the soft sealing layer from being subjected to fluid medium front-face erosion for a long time, so that the sealing effect of the valve plate and the soft sealing layer is protected, the valve overall service life is greatly prolonged, and the forced shutdown situation caused by medium leakage can further be reduced, so that the production efficiency is improved.

Description

technical field [0001] The invention relates to the technical field of valves, in particular to a butterfly valve with a sealing protection structure. Background technique [0002] Butterfly valves are frequently used valves on fluid medium conveying pipelines. When the existing butterfly valve is in the open state, the soft sealing layer on the side of the valve plate close to the fluid medium input end will be continuously scoured by the conveyed medium, and long-term frontal erosion will cause damage to the soft sealing layer of the valve plate, thereby The service life of the valve is shortened; and the medium leakage will be caused after the valve seal fails, and its potential safety hazard may cause the production to be forced to stop, thereby reducing the production efficiency. [0003] To this end, we propose a butterfly valve with a sealing protection structure. Contents of the invention [0004] The purpose of the present invention is to solve the problem that ...

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Problems solved by technology

[0004] The purpose of the present invention is to solve the problem that when the butterfly valve in the prior art is in an open state, the soft sealing layer on the side of the valve plate close to the fluid medium input end will be continuously scoured by the conveyed medium, and long-term frontal scour will cause the valve plate to The soft sealing layer of the valve is damaged, which leads to the problem of shortening the service life of the valve, and a butterfly valve with a sealing protection structure is proposed

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