A spiral duct joint structure

Through a unique spiral duct seam structure design, the problems of easy dust accumulation and weak seam are solved, thereby improving seam stability and ventilation system safety.

CN224479390UActive Publication Date: 2026-07-10XIAMEN JINSHUFENG VENTILATION EQUIP CO LTD
-1 Cites 0 Cited by

Patent Information

Application Number
CN202521576687.3
Authority / Receiving Office
CN · China
Patent Type
Utility models(China)
Current Assignee / Owner
Filing Date
2025-07-28
Publication Date
2026-07-10
Estimated Expiration
2035-07-28

AI Technical Summary

Technical Problem

The traditional spiral duct's seam structure makes it easy for dust to accumulate, affecting ventilation quality. Furthermore, the seam is not secure and is prone to falling off, leading to gas leaks and ventilation system malfunctions.

Method used

The design adopts a left biting edge that partially covers the right biting edge, combined with multiple mechanical interlocking structures and reserved gaps to enhance the biting connection strength. The different angles of the windward section are designed to block dust, and the compression effect caused by dust accumulation achieves adaptive biting enhancement.

Benefits of technology

It effectively prevents the mesh from falling off, ensures the efficient operation of the ventilation system, improves ventilation quality and system safety, and reduces the occurrence of malfunctions.

✦ Generated by Eureka AI based on patent content.

Smart Images

  • Figure CN224479390U_ABST
    Figure CN224479390U_ABST
Patent Text Reader

Abstract

This utility model discloses a spiral duct seam structure, relating to the field of ventilation duct technology. The structure includes a duct plate formed by rolling metal strip, with its seam edges connected by an interlocking structure. The interlocking structure consists of a left interlocking edge partially covering a right interlocking edge. The left interlocking edge sequentially includes a first windward section, a first double-layer pressing section, a second windward section, a first horizontal section, and a first vertical section; the right interlocking edge sequentially includes a second double-layer pressing section, a second vertical section, and a second horizontal section. The outer side of the first double-layer pressing section is pressed against the second horizontal section, the second vertical section, and the second double-layer pressing section on its upper, right, and lower sides, respectively. A reserved gap is provided between the two metal sheets of the first double-layer pressing section. By guiding and blocking dust from entering the reserved gap through the double windward sections, dust accumulation causes the gap to expand and compress the right interlocking edge, thereby adaptively enhancing the interlocking tightness and collecting dust, effectively preventing seam detachment and gas leakage, and improving ventilation quality and system safety.
Need to check novelty before this filing date? Find Prior Art