Large-span sealing door structure

By combining a double-leaf linkage door with aluminum and steel, the strength and weight issues of large-span doorways are solved, achieving a stable seal and convenient operation, meeting the loading and unloading needs of large equipment, and improving sealing performance and service life.

CN224375295UActive Publication Date: 2026-06-19ZHENGZHOU HONGYU SPECIAL VEHICLE CO LTD
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Patent Information

Authority / Receiving Office
CN · China
Patent Type
Utility models(China)
Current Assignee / Owner
ZHENGZHOU HONGYU SPECIAL VEHICLE CO LTD
Filing Date
2025-06-25
Publication Date
2026-06-19

AI Technical Summary

Technical Problem

Traditional sealed door structures struggle to balance strength and weight under large-span doorways, leading to door sagging, difficulty in opening and closing, and seal failure. Furthermore, the support beam design restricts cargo loading and unloading, failing to meet the demands for rapid loading and unloading.

Method used

It adopts a double-leaf linkage door structure, combining steel and aluminum door designs. The steel door provides strength, while the aluminum door reduces weight. It is equipped with sealing strips and U-shaped sealing strips to ensure stability and sealing. The aluminum door is composed of an aluminum frame, aluminum inner skin, aluminum corrugated plate and insulation material, which enhances structural strength and sealing performance. The sealing strip is designed in a U-shape and reinforced with connecting convex strips to improve sealing reliability.

Benefits of technology

It achieves a stable seal at large-span doorways, preventing door sagging, ensuring convenient opening and closing, meeting the loading and unloading needs of large equipment, and improving sealing performance and service life.

✦ Generated by Eureka AI based on patent content.

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Abstract

A large-span sealing door structure relates to the technical field of car body sealing door, which comprises a box body, two groups of linkage doors installed in the door opening of the box body in a split type, a plurality of pull rod locks installed at intervals on the linkage doors, and sealing strips arranged along the edges of the linkage doors. The linkage door is composed of a steel door hinged with the box body, an aluminum door hinged with the steel door, and a sealing strip installed between the two. The sealing strip is U-shaped, the outer side of the closed end is tightly connected with the linkage door, the inner side is shorter than the cross-sectional width, the outer side of the closed end has a connecting convex strip, and the width ratio of the steel door to the aluminum door is 5:4. The utility model can effectively seal the door opening of the box body, accurately and stably lock the linkage door with the box body, ensure the closing stability of the door body, avoid the problem of excessive weight of the door body when the large-span door is opened, optimize the structural strength and deformation amount, prolong the service life, improve the operation convenience and market application prospect.
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