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CN-122007538-A - Automatic welding device for heat exchange tube head and tube plate

CN122007538ACN 122007538 ACN122007538 ACN 122007538ACN-122007538-A

Abstract

The invention relates to the technical field of automatic welding devices, and discloses an automatic welding device for a heat exchange tube head and a tube plate, which is used for welding the tube plate and a plurality of groups of tube heads, wherein the welding butt joint part of the tube plate and the tube heads is elliptical, and comprises an assembly base, a telescopic module, a clamping block, a positioning seat and a positioning groove; the inside of constant head tank is provided with welding assembly, and welding assembly includes heating portion and welding portion, and welding assembly is used for carrying out automatic weld to the welding butt joint part of tube sheet and tube head. The welding assembly is integrated in the positioning groove, can accurately align with the oval butt joint part, improves welding pertinence and stability, can synchronously clamp a plurality of groups of tube heads, lays a foundation for subsequent batch automatic welding, and improves welding efficiency.

Inventors

  • MA ZHIJUN
  • LIU FUYU
  • YANG GUIQIN

Assignees

  • 吉林省天正低品位能源科技有限公司

Dates

Publication Date
20260512
Application Date
20260409

Claims (10)

  1. 1. An automatic welding device of heat exchange tube head and tube plate for weld tube plate (31) and multiunit tube head (32), the welding butt joint part of tube plate (31) and tube head (32) is oval, its characterized in that includes: an assembly base (13) for positioning the mounting tube sheet (31); The telescopic module (14) and the clamping block (17), wherein the clamping block (17) is arranged on the telescopic end of the telescopic module (14) and is used for positioning and clamping a plurality of groups of tube heads (32) positioned at two ends of the tube plate (31); The positioning seat I (21) and the positioning seat II (22) are correspondingly arranged up and down, and positioning grooves (23) are formed in the positioning seat I (21) and the positioning seat II (22); The inside of constant head tank (23) is provided with welding subassembly (24), and welding subassembly (24) are including heating portion and welding portion (27), and welding subassembly (24) are used for carrying out automatic weld to the welding butt joint portion of tube sheet (31) and tube head (32).
  2. 2. The automatic welding device for the heat exchange tube head and the tube plate according to claim 1, wherein the heating part comprises a first heating part (25) and a second heating part (26), the welding part (27) is arranged between the first heating part (25) and the second heating part (26), and the first heating part (25), the second heating part (26) and the welding part (27) are all arranged in a semi-oval shape.
  3. 3. An automatic welding device for heat exchange tube head and tube plate according to claim 2, wherein the welding assembly (24) further comprises a feeding channel (28), the feeding channel (28) is arranged on the outer side of the positioning seat I (21), the feeding channel (28) is communicated with the welding part (27), and the feeding channel (28) is used for supplying welding flux required for welding the tube plate (31) and the tube head (32).
  4. 4. An automatic welding apparatus for heat exchange tube head and tube plate according to claim 3, wherein the first heating part (25) and the second heating part (26) heat and melt the solder at the welding part (27) so as to weld the butt joint part of the tube plate (31) and the tube head (32).
  5. 5. The automatic welding device for the heat exchange tube head and the tube plate according to claim 1, wherein the first positioning seat (21) is installed on the telescopic end of the first telescopic push rod (15), the first telescopic push rod (15) realizes the movement of the first positioning seat (21) in the horizontal direction, the second positioning seat (22) is installed on the telescopic end of the second telescopic push rod (16), and the second telescopic push rod (16) realizes the movement of the second positioning seat (22) in the vertical direction.
  6. 6. The automatic welding device for heat exchange tube heads and tube plates according to claim 5, wherein a supporting piece (19) is arranged on one side of the first positioning seat (21), and the supporting piece (19) is used for positioning and supporting a plurality of tube heads (32) to be welded; The clamping block (17) is provided with a clamping groove (18), and the clamping groove (18) is correspondingly attached to the end shape of the pipe head (32); The assembly base (13) is arranged on the bottom plate (11) through the adjusting slide rail (12), and the telescopic module (14) is also arranged on the bottom plate (11).
  7. 7. The automatic welding device for the heat exchange tube head and the tube plate according to claim 2, wherein the welding mode of the welding assembly (24) is brazing, the first heating part (25) and the second heating part (26) are induction heating parts or resistance heating parts, the welding material of the welding assembly (24) is brazing filler metal, and the welding part (27) is used for uniformly filling the brazing filler metal in an oval welding butt joint part of the tube plate (31) and the tube head (32).
  8. 8. The automatic welding device for heat exchange tube heads and tube plates according to claim 7, wherein the positioning grooves (23) on the first positioning seat (21) and the second positioning seat (22) are multiple groups, the multiple groups of positioning grooves (23) are distributed at equal intervals along the length direction of the tube plate (31), each group of positioning grooves (23) corresponds to one group of tube heads (32), and the welding assembly (24) is used for synchronously welding butt joint parts of the multiple groups of tube heads (32) and the tube plate (31); the shape of the positioning groove (23) is matched with the shape of the welding assembly (24), and the inner wall of the positioning groove (23) is in sealing fit with the outer wall of the welding assembly (24) so as to prevent solder from overflowing during welding.
  9. 9. The automatic welding device for the heat exchange tube head and the tube plate according to claim 8, further comprising a control module, wherein the control module is electrically connected with the first telescopic push rod (15), the second telescopic push rod (16), the telescopic module (14) and the welding assembly (24) respectively and is used for realizing full-automatic control of a welding process; The automatic welding device further comprises a cooling assembly and a detection assembly, wherein the cooling assembly is used for cooling the welded tube plate (31) and the tube head (32), the detection assembly is used for detecting the welding quality of the welding butt joint part, and the detection assembly is any one of a visual detection assembly, an ultrasonic detection assembly and an air tightness detection assembly.
  10. 10. The automatic welding device for the heat exchange tube head and the tube plate according to claim 9, wherein the first heating part (25) and the second heating part (26) are respectively connected with a temperature control module, and the temperature control modules are used for independently controlling the heating temperatures of the first heating part (25) and the second heating part (26) and ensuring that the heating temperatures of all positions of the oval welding butt joint parts are consistent.

Description

Automatic welding device for heat exchange tube head and tube plate Technical Field The invention relates to the technical field of automatic welding devices, in particular to an automatic welding device for a heat exchange tube head and a tube plate. Background Along with the iterative development of modern industrial equipment to high efficiency, large-scale and automation, the design and manufacturing requirements of heat exchange equipment are continuously improved, and the welding of a heat exchange tube plate and a tube head also has the development trend of multi-specification adaptation, large-scale synchronous welding and high-precision automatic welding. When the traditional welding process and device are used for meeting the requirements of special-shaped butt joint surfaces, multi-group synchronous welding, high-precision forming and the like, the requirements of large-scale and high-quality production are difficult to meet gradually, and a special device which can be accurately matched with a special-shaped butt joint structure of a heat exchange tube head and a tube plate and is used for realizing efficient, stable and automatic welding is needed in the industry, so that the manufacturing technology of heat exchange equipment is further upgraded. The prior art provides a positioning device of an automatic tube plate welding machine, which is provided with a horizontal, vertical and front-back linear moving guide rail with the application number of CN201710119839.0, wherein a conical positioning mandrel is coaxial with the rotation center of a speed regulating motor for radial and axial positioning, so that the conical positioning mandrel of a welding machine head and a workpiece heat exchange tube are positioned firstly, then the conical positioning mandrel is retracted, the welding seam position is avoided, the welding is not influenced, the rotation center of the welding machine head is not deviated after the positioning mandrel is retracted, the welding is influenced, and each moving locking mechanism adopts a mode of locking anywhere. Aims at providing a device which firstly realizes the positioning of a conical positioning mandrel of a welding machine head and a workpiece heat exchange tube and then realizes the retraction of the conical positioning mandrel and the welding line position is kept away, and the positioning device of the automatic tube plate welding machine is not influenced. However, the prior art, in particular this solution, still has the following problems: The suitability of the positioning structure is limited, the positioning structure adopts a conical positioning mandrel to position, the positioning requirement of the circular heat exchange tube can be met, the accurate positioning can not be carried out on the welding butt joint part with oval tube plates and tube heads, the positioning deviation of the oval butt joint surface is easy to cause, the welding precision is further influenced, and the welding positioning requirement of the special-shaped butt joint surface can not be met. The structural design of synchronous positioning and welding of multiple groups is lacking, the positioning welding of a single heat exchange tube and a tube plate can be realized, the synchronous clamping and positioning of multiple groups of tube heads at two ends of the tube plate can not be realized, the welding efficiency is low, and the large-batch and large-scale production requirements are difficult to meet. The suitability of the welding assembly and the positioning structure is insufficient, a limiting structure matched with the outline of the welding part is not arranged, the welding assembly cannot be accurately limited in the welding process, the welding assembly is easy to deviate, the welding part deviates from the butt joint surface, and defects such as welding leakage and welding deviation occur. Disclosure of Invention The present invention aims to provide a technical solution to the problems of the prior art set forth in the background art. In order to achieve the above purpose, the invention adopts the following technical scheme: an automatic welder of heat exchange tube head and tube plate for welding tube plate and multiunit tube head, the welding butt joint part of tube plate and tube head is oval, includes: The assembling base is used for positioning and installing the tube plate; the clamping block is arranged on the telescopic end of the telescopic module and is used for positioning and clamping a plurality of groups of tube heads positioned at two ends of the tube plate; the positioning seat I and the positioning seat II are correspondingly arranged up and down, and positioning grooves are formed in the positioning seat I and the positioning seat II; the inside of constant head tank is provided with welding assembly, and welding assembly includes heating portion and welding portion, and welding assembly is used for carrying out automatic weld to the welding but