A fireproof and heat-insulating air duct and its manufacturing process and equipment

By using interlocking pipe molding and mold design, the problems of insufficient heat insulation and fire resistance of air ducts and complicated installation are solved, achieving efficient and precise air duct splicing and high-quality molding results.

CN117267499BActive Publication Date: 2026-05-05DEZHOU FULITE ENVIRONMENTAL PROTECTION TECH CO LTD
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Patent Information

Application Number
CN202311317420.8
Authority / Receiving Office
CN · China
Patent Type
Patents(China)
Current Assignee / Owner
Filing Date
2023-10-12
Publication Date
2026-05-05
Estimated Expiration
2043-10-12

AI Technical Summary

Technical Problem

Existing single-layer air ducts have limited thermal insulation and fire resistance, while double-layer air ducts are cumbersome to process and install and difficult to demold, and are prone to air bubbles during injection molding, affecting molding quality.

Method used

The design adopts a bite-fitting pipe design, including bite-fitting pipe one and bite-fitting pipe two. The inner cavity is equipped with bite-fitting pipe one, and both ends are equipped with flange connection frames and mating blocks. It is integrally formed by mold, and the mold design and vibration elimination components in the production equipment are used to eliminate air bubbles, so as to achieve rapid demolding and precise installation.

Benefits of technology

It improves the insulation and fire resistance of air ducts, simplifies the installation process, ensures accurate connection of air ducts, and produces a smooth surface on the finished product, thereby improving processing efficiency and quality.

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Abstract

This invention discloses a fireproof and heat-insulating air duct, its manufacturing process, and equipment in the field of heat-insulated air duct technology. It includes a second interlocking pipe, with an inner cavity containing a first interlocking pipe. One end of the first interlocking pipe has a sub-flange connecting frame, and the other end has a female flange connecting frame. The sub-flange connecting frame has four corner butt blocks, and each pair of sub-flange blocks has a second butt block. The female flange connecting frame has four corner butt grooves, and each pair of sub-flange grooves has a second butt groove. The two ends of the second interlocking pipe are fixedly connected to the sub-flange connecting frame and the female flange connecting frame, respectively. Flanges 1 and 2 are fixedly connected to both ends of the second interlocking pipe. The cavity formed between the second and first interlocking pipes is tightly filled with aluminum silicate fiber blankets, rock wool, or glass wool, solving the problem of inconsistent processing and installation of double-layer air ducts.
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