Sealing butterfly valve

By constructing a through-type gas cooling channel in the sealed butterfly valve and using compressed air for active convection cooling, the problems of complex cooling structure and difficult carbon removal of the sealed butterfly valve are solved, achieving efficient heat dissipation and online cleaning, extending the actuator life and reducing maintenance costs.

CN121497880APending Publication Date: 2026-02-10THE 711TH RES INST OF CHINA STATE SHIPBUILDING CORP
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Patent Information

Application Number
CN202511717784.4
Authority / Receiving Office
CN · China
Patent Type
Applications(China)
Current Assignee / Owner
Filing Date
2025-11-21
Publication Date
2026-02-10

AI Technical Summary

Technical Problem

The existing cooling structure of sealed butterfly valves is too complex, which affects the service life of the actuator, has high maintenance costs, and makes it difficult to effectively remove carbon deposits.

Method used

A through-flow gas cooling channel is designed, which is constructed by the valve stem and the butterfly plate. The cooling medium, such as compressed air, is used for active convection cooling. The butterfly plate sealing surface is provided with an air outlet to directly discharge the cooling medium, forming an air film to prevent carbon deposits and cleaning the sealing surface through airflow.

Benefits of technology

It improves heat dissipation efficiency, extends the lifespan of the actuator, reduces maintenance costs, enables online cleaning, and enhances sealing and maintenance efficiency.

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Abstract

The invention discloses a sealing butterfly valve and belongs to the technical field of butterfly valves, the sealing butterfly valve comprises a valve seat, a valve rod and a butterfly plate, the valve rod is provided with a first air channel and a first air inlet which are communicated, and an air inlet connector is arranged at the first air inlet; the butterfly plate is provided with a second air passage and a second air outlet which are communicated, the butterfly plate is connected with the valve rod, the first air passage is communicated with the second air passage, the butterfly plate comprises a sealing surface, and the butterfly plate is in sealing connection with the valve seat through the sealing surface; and the second air outlet is formed in the sealing surface. The through type gas cooling channel is formed by the valve rod and the butterfly plate, the second gas outlet is formed in the sealing face of the butterfly plate and serves as an outlet of the cooling channel to discharge a cooling medium so as to form active convection cooling, the cooling medium directly acts on a high-temperature area, namely, the area where the butterfly plate makes contact with a flow channel medium in the butterfly valve, and the heat dissipation efficiency is high; heat of the butterfly plate and the valve rod can be prevented from being transmitted to the actuator, and the service life of the actuator is prolonged.
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