Prefabricated chimney with inner liner

The threaded connection design of the inner liner and outer cylinder components solves the problem of inconvenient flange connection of prefabricated chimneys, enabling rapid assembly and stable connection, and enhancing rainproof performance.

CN224743524UActive Publication Date: 2026-09-11苏州瑞伦金属制品有限公司
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Patent Information

Application Number
CN202522205166.3
Authority / Receiving Office
CN · China
Patent Type
Utility models(China)
Current Assignee / Owner
Filing Date
2025-10-20
Publication Date
2026-09-11
Estimated Expiration
2035-10-20

AI Technical Summary

Technical Problem

The flange connection holes of existing prefabricated chimneys are small, which requires manual adjustment of the position during assembly, making the operation inconvenient and hindering rapid installation.

Method used

The design employs an inner liner assembly and an outer cylinder assembly, utilizing inner and outer ring grooves in conjunction with inner and outer connecting rings, and achieving rapid assembly through threaded connections. The connection strength and rainproof performance are enhanced at the splicing points.

Benefits of technology

It enables rapid assembly and stable connection of prefabricated chimneys, improving installation efficiency, while reducing the entry of rain and snow in rainy and snowy weather, and enhancing the stability and protective performance of the connection.

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Abstract

This utility model discloses a prefabricated chimney with an inner liner structure, belonging to the field of prefabricated chimney technology. It includes an inner liner assembly and an outer cylinder assembly. The inner liner assembly includes a bottom inner cylinder and an assembled inner cylinder. The outer cylinder assembly includes a bottom outer cylinder and an assembled outer cylinder. A lower flange is fixed to the bottom end of the bottom inner cylinder. Inner annular grooves are formed at the top and bottom ends of both the bottom and assembled inner cylinders. Outer annular grooves are formed at the top and bottom ends of both the bottom and assembled outer cylinders. Inner connecting rings and outer connecting rings are respectively installed in the inner and outer annular grooves. Internal threaded holes are formed on the sidewalls of both the inner connecting rings and inner annular grooves. External threaded holes are formed on the sidewalls of both the outer connecting rings and outer annular grooves. Internal bolts are connected to the internal threads of the internal threaded holes, and external bolts are connected to the internal threads of the external threaded holes. An insulation layer is installed between the inner liner assembly and the outer cylinder assembly. This method allows for rapid assembly and ease of use.
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