Ultralow-temperature three-eccentric center butterfly valve
By using the double sealing structure of the lip ring of cobalt-based alloy and PTFE composite material and the graphite filler group in the three eccentric butterfly valve, the problem of poor sealing performance of graphite filler under ultra-low temperature conditions is solved, and good low-temperature sealing performance and stability are achieved.
CN222633842UActive Publication Date: 2025-03-18BRAY (CHINA) CONTROLS CO LTD +1
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Patent Information
- Application Number
- CN202420757521.0
- Authority / Receiving Office
- CN · China
- Patent Type
- Utility models(China)
- Current Assignee / Owner
- Filing Date
- 2024-04-12
- Publication Date
- 2025-03-18
- Estimated Expiration
- 2034-04-12
AI Technical Summary
Technical Problem
When the existing three-eccentric butterfly valves convey ultra-low temperature liquids, the graphite packing has poor sealing performance and is prone to freezing, resulting in abnormal noise, wear and liquid leakage during opening and closing.
Method used
The double sealing structure is adopted, including a lip ring composed of a cobalt-based alloy and PTFE composite material, and a graphite filler set to ensure good sealing performance between the valve stem and the extension valve cover.
Benefits of technology
Under ultra-low temperature conditions, the good low-temperature sealing performance of the lip ring avoids seal leakage and enhances the stability and reliability of the valve.
✦ Generated by Eureka AI based on patent content.
Abstract
The ultralow-temperature three-eccentric center butterfly valve comprises a valve rod, a valve body and a valve plate, the valve rod is rotationally arranged in the valve body, the valve plate is arranged on the valve rod and located in the valve body, the ultralow-temperature three-eccentric center butterfly valve further comprises an extended valve deck, a graphite packing set and a lip-shaped ring, the extended valve deck is arranged on the valve body, the graphite packing set is arranged on the extended valve deck, and the lip-shaped ring is arranged on the extended valve deck. The valve rod is rotatably matched with a through hole of the extended valve cover, the graphite packing group is arranged between the valve rod and the extended valve cover, and the lip-shaped ring is arranged between the valve rod and the extended valve cover and is positioned between the graphite packing group and the valve body; the lip-shaped ring comprises a cobalt-based alloy and PTFE (Polytetrafluoroethylene), and the cobalt-based alloy is coated with the PTFE. Compared with the prior art, the butterfly valve has the advantages that by arranging the lip-shaped ring and the graphite packing set, double sealing of the valve rod is achieved, the low-temperature sealing performance between the valve rod and the extension valve cover is enhanced, and the probability of sealing leakage at the low temperature is reduced.
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