Outer curve finned tube and manufacturing method thereof

Abstract

The invention provides an outer curve finned tube and a manufacturing method thereof. The finned tube comprises a tube body and fins located on the outer wall of the tube body; the tube body is made of metal; and the fins are made of aluminum or copper. The finned tube is characterized in that each fin comprises a first-stage fin body and secondary fin bodies, the second-stage fin bodies are arranged on the first-stage fin bodies, the multiple secondary fin bodies are arranged on each first-stage fin body and are asymmetrically arranged on each first-stage fin body, the multiple fins are arranged on the outer wall of the tube body in an circular ring shape in the direction perpendicular to the tube axis so as to form a plurality of circular ring fin groups, and the value of the distance between every two adjacent circular ring fin groups in the multiple circular ring fin groups is gradually increased in the direction of the tube axis and is in an equal-difference arrangement mode.

Description

technical field [0001] The invention relates to a heat exchange tube, in particular to an outer curved finned tube and a manufacturing method thereof. Background technique [0002] Finned tube is a heat exchange element. In order to improve the heat exchange efficiency, fins are usually added on the surface of the heat exchange tube to increase the outer surface area (or inner surface area) of the heat exchange tube, so as to achieve the purpose of improving the heat exchange efficiency. Such a heat exchange tube. [0003] There are various types of fins. According to the shape of the fins, the finned tubes can be divided into square finned tubes, circular finned tubes, spiral finned tubes, and longitudinal finned tubes. Tube), corrugated finned tubes, helical serrated finned tubes (Helical Serrated Finned Tubes), pin-shaped finned tubes, integral plate-shaped finned tubes (plate fins), inner finned tubes (inner finned tubes), etc. . [0004] However, the heat transfer ef...

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Problems solved by technology

[0004] However, the heat transfer efficiency of many finned tubes still cannot fully meet the needs of heat transfer, and each of the above-mentioned fins has problems of one kind or another during production, and cannot meet the needs of simple processes. , therefore, there is an urgent need to provide a finned tube that can meet the requirements of the production process while improving the heat exchange efficiency, and liberate the productivity to meet the production needs

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