A metal pipe flanging structure

By setting annular welding auxiliary parts on the outer and inner circumferences of the metal pipe end, the problems of insufficient inner filling and poor outer sealing during the welding of radiator metal pipes are solved, thereby improving welding strength and sealing and adapting to various welding scenarios.

CN224508779UActive Publication Date: 2026-07-17TIANJIN JIUDING YANGGUANG HVAC CO LTD
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Patent Information

Authority / Receiving Office
CN · China
Patent Type
Utility models(China)
Current Assignee / Owner
TIANJIN JIUDING YANGGUANG HVAC CO LTD
Filing Date
2025-08-10
Publication Date
2026-07-17

AI Technical Summary

Technical Problem

When welding existing radiator metal pipes, insufficient filling of the inner weld seam can easily lead to depressions, and poor sealing of the outer weld seam can result in water leakage and insufficient weld strength, affecting service life and heat dissipation efficiency.

Method used

Annular first and second welding auxiliary parts are respectively provided on the outer and inner circumferences of the end of the metal tube body to ensure that the weld is fully filled during welding, and the second welding auxiliary part supports the deposited metal to improve the welding strength and sealing performance.

Benefits of technology

It effectively improves the structural strength and sealing of metal pipes after welding, ensures uniform stress on the weld, adapts to various welding scenarios, avoids weld depressions and leakage problems, and improves welding quality.

✦ Generated by Eureka AI based on patent content.

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    Figure CN224508779U_ABST
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Abstract

The application provides a metal pipe flanging structure, comprising: a metal pipe body; a first welding auxiliary part, which is arranged on the outer peripheral side of the end part of the metal pipe body, is annular, and is provided with a first auxiliary welding surface on the side far away from the metal pipe body; a second welding auxiliary part, which is arranged on the inner peripheral side of the end part of the metal pipe body, is annular, and is provided with a second auxiliary welding surface on the side far away from the metal pipe body; the first auxiliary welding surface and the second auxiliary welding surface are flush with the end part of the metal pipe body and are perpendicular to the side wall of the metal pipe body. The flanging structure can ensure the complete filling of the weld on the inner side of the metal pipe during welding, avoid the concave weld on the outer side of the metal pipe, and improve the welding strength of the metal pipe.
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Claims

1. A metal pipe flange structure characterized by comprising: include: Metal tube body (10); The first welding auxiliary part (20) is provided on the outer periphery of the end of the metal tube body (10). The first welding auxiliary part (20) is annular and a first auxiliary welding surface (21) is formed on the side away from the metal tube body (10). The second welding auxiliary part (30) is provided on the inner circumferential side of the end of the metal tube body (10). The second welding auxiliary part (30) is annular and a second auxiliary welding surface (31) is formed on the side away from the metal tube body (10). The first auxiliary welding surface (21) and the second auxiliary welding surface (31) are both flush with the end of the metal tube body (10) and perpendicular to the side wall of the metal tube body (10).

2. The metal tube flange structure according to claim 1, characterized in that, The first welding auxiliary part (20) has a dimension along the axial direction of the metal tube body (10) that is 0.2-1.0 times the wall thickness of the metal tube body (10), and the second welding auxiliary part (30) has a dimension along the axial direction of the metal tube body (10) that is 0.1-1.0 times the wall thickness of the metal tube body (10).

3. The metal pipe flange structure according to claim 2, characterized by The first welding auxiliary part (20) and the second welding auxiliary part (30) have a radial dimension along the metal tube body (10) that is 0.2-0.9 times the wall thickness of the metal tube body (10).

4. The metal pipe flange structure according to claim 3, characterized by The first welding auxiliary part (20) and the second welding auxiliary part (30) are integral with the metal tube body (10).

5. The metal pipe flange structure according to claim 4, wherein The first welding auxiliary part (20) and the second welding auxiliary part (30) are formed by cold working at the end of the metal tube body (10).

6. The metal pipe flange structure according to claim 5, wherein The first welding auxiliary part (20) has a first flanged slope (22) on the side away from the first auxiliary welding surface (21), and the second welding auxiliary part (30) has a second flanged slope (32) on the side away from the second auxiliary welding surface (31). Both the first flanged slope (22) and the second flanged slope (32) are at an angle of 85°-95° ​​to the axial direction of the metal tube body (10).

7. The metal pipe flange structure according to claim 6, wherein The inner arm of the second welding auxiliary part (30) is parallel to the axial direction of the metal tube body (10).

8. The metal pipe flange structure according to claim 7, wherein The radius of the transition fillet (40) between the first flange bevel (22) and the second flange bevel (32) and the side wall of the metal tube body (10) is 0.4-0.8 times the wall thickness of the metal tube body (10).