Positioning device between heat exchange tube and tube hole

Abstract

The invention discloses a positioning device between a heat exchange tube and a tube hole. The positioning device comprises a first positioning tube and a second positioning tube. The outer diameter of the first positioning tube is matched with the diameter of the tube hole in a tube sheet, and the first positioning tube can be sleeved inside the tube hole of the tube sheet in a close fit mode. The outer diameter of the second positioning tube is matched with the inner diameter of the heat exchange tube, and the second positioning tube can be sleeved outside the heat exchange tube in a close fit mode. The axis of the first positioning tube and the axis of the second positioning tube are the same. The first positioning tube and the second positioning tube are fixedly connected through a reduction nipple. The reduction nipple is flush with the outer wall of the first positioning tube and the outer wall of the second positioning tube respectively. The reduction nipple is provided with two welding holes which can conduct spot welding between the tube sheet and the heat exchange tube. The positioning device between the heat exchange tube and the tube hole has the advantages that the structure is simple and practical, operation and use are also very convenient and fast, and the welding quality and the welding efficiency for deep hole welding between the heat exchange tube and the tube sheet are greatly improved.

Description

technical field [0001] The invention relates to a positioning device between the heat exchange tube and the tube hole when the heat exchange tube and the tube plate deep hole are welded in the superheater. Background technique [0002] Deep hole welding is required between the heat exchange tube and the tube sheet in the superheater. When welding, it is necessary to ensure that the heat exchange tube is concentric with the tube hole, and when the diameter of the heat exchange tube is smaller than the diameter of the tube hole on the tube plate, and the difference between the two is large, it is difficult to ensure that the heat exchange tube and the tube hole during welding The tube holes on the tube sheet are concentric, resulting in poor welding quality between the heat exchange tubes and the tube sheet. Contents of the invention [0003] The object of the present invention is to provide a positioning device between the heat exchange tube and the tube hole which has a s...

AI Technical Summary

Problems solved by technology

When welding, it is necessary to ensure that the heat exchange tube is concentric with the tube hole, and when the diameter of the heat exchange tube is smaller than the diameter of the tube hole on the tube plate, and the difference between the two is large, it is difficult to ensure that the heat exchange tube and the tube hole during welding The tube holes on the tube sheet are concentric, resulting in poor welding quality between the heat exchange tube and the tube sheet

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