A kind of expansion pipe device and its production process

Abstract

The invention relates to a pipe expansion device and a production technology thereof. The pipe expansion device comprises a pressure-resistant pipe, and a pipe expansion tool is arranged on the pipe expansion device, wherein the pipe expansion tool comprises a connecting piece; a flange is arranged on the outer side wall of the connecting piece; the diameter of the flange is greater than that of the pressure-resistant pipe; the connecting piece is further connected with a pull rope. The pipe expansion device provided by the invention has the advantages as follows: the pressure-resistant pipe can be conveniently mounted in a fin pipe, and the pressure-resistant pipe is completely fitted with the inner wall of the fin pipe through the expansion force of the flange to the pressure-resistant pipe, therefore, that no air exists between the pressure-resistant pipe and the fin pipe is ensured, and the pressure-resistant pipe cannot be pulled out of the fin pipe.

Description

technical field [0001] The invention relates to an expansion tube device and a production process thereof. Background technique [0002] Finned tube is a kind of heat exchange tube. In order to improve the heat exchange efficiency, fins are usually added to 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 heat exchange efficiency. . [0003] In the finned tube, there will be a pressure-resistant tube, which can strengthen the strength of the heat exchange tube and maintain a good heat exchange effect, but the premise is that there is no gap between the pressure-resistant tube and the finned tube, because in the Once there is air between the pressure tube and the finned tube, it will affect the heat transfer effect of the finned tube. Once there is air between the pressure tubes, it will affect the effect of vaporization. [0004] Therefore, the diameter of ...

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Problems solved by technology

[0003] In the finned tube, there will be a pressure-resistant tube, which can strengthen the strength of the heat exchange tube and maintain a good heat exchange effect, but the premise is that there is no gap between the pressure-resistant tube and the finned tube, because in the Once there is air between the pressure tube and the finned tube, it will affect the heat transfer effect of the finned tube. Once there is air between the pressure tubes, it will affect the effect of vaporization

[0004] Therefore, the diameter of the pressure-resistant tube is generally set to be the same as the inner diameter of the finned tube, but it is difficult to insert the pressure-resistant tube into the finned tube, especially when the pressure-resistant tube is more than ten meters long. It is difficult to fully insert the pressure tube into the finned tube, which is not only time-consuming and laborious, but also easily damages the pressure tube or the finned tube

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