Fire-resistant protection device for a sediment drain valve of an aircraft fuel tank and aircraft

By using a combination design of an outer fixed cover, an inner sealing cover, and elastic elements on the sedimentation valve, the problems of loss of maintenance function and reduced discharge capacity when meeting fire resistance requirements are solved, achieving a balance between fire resistance and function of the equipment, and reducing production costs and time.

CN116080914BActive Publication Date: 2026-06-12COMMERCIAL AIRCRAFT CORP OF CHINA LTD +1
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Patent Information

Authority / Receiving Office
CN · China
Patent Type
Patents(China)
Current Assignee / Owner
COMMERCIAL AIRCRAFT CORP OF CHINA LTD
Filing Date
2023-03-27
Publication Date
2026-06-12

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Abstract

The application relates to a fireproof protection device for an aircraft fuel tank sediment drain valve and an aircraft. The fireproof protection device for the aircraft fuel tank sediment drain valve comprises an outer fixing cover, an elastic piece, an inner sealing cover and a high-temperature-resistant sealing ring; wherein the outer fixing cover is installed to the fuel tank, the inner sealing cover comprises a lower flange, the high-temperature-resistant sealing ring is installed between the lower flange of the inner sealing cover and a lower wall plate of the fuel tank, the elastic piece is installed between the inner top surface of the outer fixing cover and the lower flange of the inner sealing cover, the outer fixing cover comprises a plurality of flow-through channels located on the side surface of the outer fixing cover, the inner sealing cover is designed as a full sealing type and is used for covering the sediment drain valve. According to the above technical scheme, the application can achieve the following beneficial technical effects: the fireproof protection device can realize the fireproof performance while not affecting the original maintenance and discharge functions of the sediment drain valve.
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