A kind of outer helical curved finned tube and its manufacturing method

Abstract

The invention provides an external-spiral curve finned tube and a production method thereof. The external-spiral curve finned tube includes a tube body and fins which are located at the outer wall ofthe tube body, the tube body is made of metal materials, and the fins are made of copper materials; the fins include first-stage fin bodies and second-stage fin bodies, the second-stage fin bodies arearranged on the first-stage fin bodies, each of the first-stage fin bodies are provided with a plurality of second-stage fin bodies, and the multiple fin bodies are not symmetrically distributed on the first-stage fin bodes; and the multiple fins are spirally arranged on the outer wall of the tube body in the tube-axis direction to form multiple spiral fin groups, a distance value of the adjacentfins of each of the spiral fin groups is gradually bigger in the tube-axis direction, and the distance values are arranged in equal difference.

Description

technical field [0001] The invention relates to a heat exchange tube, in particular to an outer helical 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 tra...

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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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