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CN-224223138-U - Tube head welding structure of chlorine liquefier

CN224223138UCN 224223138 UCN224223138 UCN 224223138UCN-224223138-U

Abstract

The utility model discloses a tube head welding structure of a chlorine liquefier, which comprises a tube plate and a plurality of heat exchange tubes, wherein the heat exchange tubes penetrate through the tube plate, the length of the tube heads of the heat exchange tubes extending out of the tube plate is 0-1 mm, grooves used for being connected with the heat exchange tubes are formed in the tube plate, the angles of the grooves are 45-60 degrees, interference fit is formed between the heat exchange tubes and the wall of the tube plate through expansion joint, and welding seams are filled in the grooves to fixedly connect the heat exchange tubes with the tube plate. The welding structure of the chlorine liquefier tube head can improve the welding quality of the chlorine liquefier tube head, enhance the connection reliability and effectively prevent leakage.

Inventors

  • DAI LIANSHENG
  • LU YANCONG
  • WANG TAO
  • WANG YANG
  • HAN GAN
  • PAN RANRAN

Assignees

  • 武汉新世界制冷工业有限公司

Dates

Publication Date
20260512
Application Date
20250514

Claims (9)

  1. 1. The chlorine liquefier tube head welding structure is characterized by comprising a tube plate (1) and a plurality of heat exchange tubes (2), wherein the heat exchange tubes (2) penetrate through the tube plate (1), and the length L of the tube head of each heat exchange tube (2) extending out of the tube plate (1) is 0-1 mm; The tube plate (1) is provided with a groove (3) for connecting with the heat exchange tube (2), and the angle of the groove (3) is 45-60 degrees; the heat exchange tube (2) and the hole wall of the tube plate (1) form interference fit through expansion joint, and a welding seam (4) is filled in the groove (3) to fixedly connect the heat exchange tube (2) and the tube plate (1).
  2. 2. The chlorine liquefier tube head welding structure according to claim 1, wherein the depth of the groove (3) is 1-2 mm.
  3. 3. The chlorine liquefier tube head welding structure according to claim 1, wherein the length of the tube head of the heat exchange tube (2) extending out of the tube plate (1) is 0.2-0.8 mm.
  4. 4. The chlorine liquefier tube head welding structure as claimed in claim 1, 2 or 3, wherein the groove (3) is a V-shaped groove.
  5. 5. The chlorine liquefier tube head welding structure according to claim 1, 2 or 3, wherein the interference between the heat exchange tube (2) and the hole wall of the tube plate (1) is 0.05-0.15 mm.
  6. 6. The chlorine liquefier tube head welding structure as claimed in claim 1, 2 or 3, wherein the welding seam (4) is a multi-layer and multi-channel fillet weld.
  7. 7. The chlorine liquefier tube head welding structure as claimed in claim 1, 2 or 3, wherein the angle of the groove (3) is 45-50 degrees.
  8. 8. The chlorine liquefier tube head welding structure as claimed in claim 1, 2 or 3, wherein the tube head end surface of the heat exchange tube (2) is a tube head with smooth and flat surface.
  9. 9. The chlorine liquefier tube head welding structure according to claim 1, 2 or 3, wherein the center distance between two adjacent heat exchange tubes (2) is not smaller than 1.25 times of the outer diameter of the heat exchange tubes (2).

Description

Tube head welding structure of chlorine liquefier Technical Field The utility model relates to the technical field of manufacturing of chlorine liquefiers, in particular to a tube head welding structure of a chlorine liquefier. Background The chlorine liquefier has important application in the fields of chemical industry, environmental protection and the like, and has the main function of converting gaseous chlorine into liquid state, thereby being convenient for storage and transportation. In the manufacturing process of the chlorine liquefier, the connection quality between the heat exchange tube and the tube plate directly influences the performance and the service life of the equipment. The traditional chlorine liquefier tube head welding process has a plurality of problems. For example, when the heat exchange tube is cut by a grinding wheel, the tube is fixed at the far end by manpower, the cutting end is not fixed, the tube is easy to rotate, the cut tube head is uneven, and the length of part of the tube head extending out of the tube plate does not meet the process requirements. In addition, although the deformation-preventing tool is adopted in the tube plate welding process, deformation is still difficult to completely avoid, so that the local heat exchange tube is sunken and is lower than the plane of the tube plate. These problems lead to insufficient fusion of the welding material and the base material during welding, thinner weld joints at the tube head parts, insufficient weld joint strength and easy leakage in the running process of equipment. In addition, the long-term use of the tube expander generates accumulated hemlock, damages the tube head, and also brings quality hidden trouble to the welding of the tube head. Disclosure of utility model The utility model aims to overcome the defects of the background technology and provide a welding structure of a chlorine liquefier tube head, which can improve the welding quality of the chlorine liquefier tube head, enhance the connection reliability and effectively prevent leakage. In order to achieve the aim, the tube head welding structure of the chlorine liquefier comprises a tube plate and a plurality of heat exchange tubes, wherein the heat exchange tubes penetrate through the tube plate, and the length L of the tube heads of the heat exchange tubes, extending out of the tube plate, is 0-1 mm; The tube plate is provided with a groove for connecting with a heat exchange tube, and the angle of the groove is 45-60 degrees; the heat exchange tube and the hole wall of the tube plate form interference fit through expansion joint, and welding seams are filled in the grooves to fixedly connect the heat exchange tube and the tube plate. Further, the depth of the groove is 1-2 mm. Further, the length of the tube head of the heat exchange tube extending out of the tube plate is 0.2-0.8 mm. Further, the groove is a V-shaped groove. Further, the interference between the heat exchange tube and the hole wall of the tube plate is 0.05-0.15 mm. Further, the weld is a multi-layered multi-pass fillet weld. Further, the angle of the groove is 45-50 degrees. Still further, the tube head end face of the heat exchange tube is a tube orifice with smooth and flat surface. Furthermore, the center distance between two adjacent heat exchange tubes is not less than 1.25 times of the outer diameter of the heat exchange tubes. Compared with the prior art, the utility model has the following advantages: Firstly, the welding structure of the chlorine liquefier tube head obviously improves the welding quality, effectively solves the problem of tube head welding leakage caused by the fact that the tube head is lower than the plane of a tube plate, the welding material is not fully fused with a base metal, the strength of a welding line is not sufficient and the like, enhances the sealing performance of the chlorine liquefier and improves the overall reliability and stability of equipment. Secondly, the welding structure of the chlorine liquefier tube head reduces equipment maintenance and replacement frequency caused by welding quality problems, prolongs the service life of the chlorine liquefier and reduces equipment maintenance cost. Thirdly, the welding structure of the chlorine liquefier tube head improves the production efficiency, reduces the equipment downtime and production interruption caused by leakage problems, ensures the production continuity, and has good economic and social benefits. Fourthly, the heat exchange tube head extends out of 0-1 mm, so that the weld joint is guaranteed to be completely fused on the outer side, burning through caused by stress concentration or too short of the tube head due to overlong tube head is avoided, and leakage is remarkably reduced. The bevel angle is 45-60 degrees, a natural V-shaped molten pool is formed, the fluidity of the welding material and the wettability of the base metal are optimal, and the defects of slag inclusion