CN101927389B - Welding process of heat exchanger equipment - Google Patents
Welding process of heat exchanger equipment Download PDFInfo
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- CN101927389B CN101927389B CN201010173296A CN201010173296A CN101927389B CN 101927389 B CN101927389 B CN 101927389B CN 201010173296 A CN201010173296 A CN 201010173296A CN 201010173296 A CN201010173296 A CN 201010173296A CN 101927389 B CN101927389 B CN 101927389B
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Abstract
The invention discloses a welding process of a heat exchanger equipment, which comprises the steps of: firstly, welding C2 weld seams; secondly, welding C1 weld seams after the C2 weld seams are welded, wherein the welding sequence is carried out strictly according to the * shape. After the welding sequence of a heat exchanger is changed, the invention improves the manufacture quality of the heat exchanger, and effectively reduces the welding deformation of a tube plate because the C1 weld seams are welded by adopting the * shape; and flaws are not leaked in the C1 weld seams so far.
Description
Technical field
The present invention relates to a kind of welding procedure of heat exchange equipment.
Background technology
Heat exchanger is between different material, to carry out the equipment that heat transmits, and it mainly acts on is operating temperature and the phase of keeping or change material, satisfies the technological operation requirement, improves the process energy utilization ratio and carries out waste heat recovery.
Heat exchanger generally has tube side and two cavitys of shell side; Its main pressurized element has end socket, cylindrical shell, tube sheet, heat exchanger tube, flange, adapter etc.; Attachment weld through heat exchanger tube and tube sheet separates the material of two kinds of cavitys is strict, and its weldquality is determining the result of use of heat exchange equipment.
The quality of heat exchanger fabricating quality directly influences the normal operation of project, mainly shows the formed C1 class of heat exchanger tube and tube sheet weld seam.Through searching interrelated data and conscientiously summing up the variety of issue that occurs in the heat exchanger use, find that Welding of Heat-exchanger in the past is irrational in proper order, adopt the method for welding heat exchanger tube and the formed C1 class of tube sheet weld seam earlier to prevent that the tube sheet welding deformation from being wrong; The tube plate deformation stress that the welding of the formed C2 class of tube sheet and shell-side cylinder weld seam causes concentrates in the C1 class weld seam; Can't discharge, temporarily can not find to reveal, and in the use afterwards; Can cause weld seam crackle to occur; Shell side and tube side material mix string, directly influence project operation, even bring must economic loss.
Summary of the invention
The welding procedure that the purpose of this invention is to provide a kind of heat exchange equipment.
The technical scheme that the present invention takes is:
The welding procedure of heat exchange equipment comprises the steps:
(1) after heat transmission equipment shell side assembling is accomplished, clears up place to be welded, earlier welding C2 class (be shell-side cylinder and the right weld seam of tube sheet group, below roughly the same) weld seam;
(2) after C2 class weld seam has welded, weld C1 class (be the right weld seam of tube sheet and set of heat exchange tubes, below roughly the same) weld seam again, welding sequence is welded in strict accordance with " rice " font, i.e. welding " ten " font at first, symmetry or skips welding then.
The welding of the described C2 class of step (1) weld seam, according to the corresponding manual metal-arc welding material of the material selection of shell-side cylinder and the tube sheet trade mark, power type is a direct current; Polarity is reversal connection; Wherein bottom wlding specification is φ 3.2mm, and welding current is 80～110A, arc voltage 19～21V; The second layer and the 3rd layer of wlding specification are φ 4.0mm, and welding current is 110～150A, and arc voltage is 23～25V.
Welding C2 class weld seam requires little electric current, multilayer welding, and interlayer temperature is not more than 80 ℃.
The welding of the described C1 class of step (2) weld seam is selected the corresponding argon arc wlding trade mark for use according to the material of tube sheet and heat exchanger tube, and power type is a direct current, and polarity is for just connecing, and the wlding specification is φ 0.8mm, and welding current is 160～175A, arc voltage 8.5～10V.
The minimum weldering twice of the welding of described heat exchanger tube of step (2) and tube sheet, every time starting the arc interlaces 180 °.
The present invention changes after the Welding of Heat-exchanger order; Effectively raise the fabricating quality of heat exchanger, C1 class weld seam adopts the welding of " rice " font, effectively reduces the tube sheet welding deformation; This year; For organosilicon, methane chloride, melamine, caustic soda, five projects of DMF newly go up in western Shandong group, C1 class weld seam does not take place and the phenomenon that crackle is revealed occurs in about more than 200 heat exchange equipments of making in the use.
Description of drawings
Fig. 1 is heat exchanger structure figure;
Wherein: 1. shell-side cylinder 2. tube sheets 3. heat exchanger tubes 4. C2 class weld seams 5. C1 class weld seams.
The specific embodiment
Embodiment 1
The welding procedure of heat exchange equipment comprises the steps:
(1) after the assembling of heat transmission equipment shell side is accomplished, clears up place to be welded, earlier welding C2 class weld seam; According to the corresponding manual metal-arc welding material of the material selection of shell-side cylinder and tube sheet, power type is a direct current, and polarity is reversal connection; Wherein bottom wlding specification is φ 3.2mm, and welding current is 80A, arc voltage 19V; The second layer and the 3rd layer of wlding specification are φ 4.0mm, and welding current is 110A, and arc voltage is 23V;
(2) after C2 class weld seam has welded, weld C1 class weld seam again, welding sequence is welded in strict accordance with " rice " font; At first weld " ten " font, symmetry or skips welding is then selected corresponding argon arc wlding for use according to the material of tube sheet and heat exchanger tube; Power type is a direct current, and polarity is for just connecing, and the wlding specification is φ 0.8mm; Welding current is 160A, arc voltage 8.5V.
Require:
(1) strict control heat exchanger tube cleaning before welding must be seen the metal primary colors, and touching with hand to have greasy dirt.
(2) welding sequence is welded in strict accordance with " rice " font, at first welds " ten " font, symmetry or skips welding then.
(3) the minimum weldering twice of the welding of heat exchanger tube and tube sheet, every time starting the arc interlaces 180 °.
(4) strict control of when welding interlayer temperature, and interlayer temperature is not more than 80 ℃, and the angle welding height of heat exchanger tube and tube sheet exceeds tube sheet 2mm at least.
Embodiment 2
The welding procedure of heat exchange equipment comprises the steps:
(1) after the assembling of heat transmission equipment shell side is accomplished, clears up place to be welded, weld C2 class weld seam earlier, according to shell-side cylinder and pipe
The corresponding manual metal-arc welding material of the material selection of the plate trade mark, power type is a direct current, and polarity is reversal connection, and wherein bottom wlding specification is φ 3.2mm, and welding current is 110A, arc voltage 21V; The second layer and the 3rd layer of wlding specification are φ 4.0mm, and welding current is 150A, and arc voltage is 25V;
(2) after C2 class weld seam has welded, weld C1 class weld seam again, welding sequence is welded in strict accordance with " rice " font; At first weld " ten " font, symmetry or skips welding is then selected the corresponding argon arc wlding trade mark for use according to the material of tube sheet and heat exchanger tube; Power type is a direct current, and polarity is for just connecing, and the wlding specification is φ 0.8mm; Welding current is 175A, arc voltage 10V.
Require: the cleaning before welding of (1) strict control heat exchanger tube, must see the metal primary colors, touching with hand to have greasy dirt.
(2) welding sequence is welded in strict accordance with " rice " font, at first welds " ten " font, symmetry or skips welding then.
(3) the minimum weldering twice of the welding of heat exchanger tube and tube sheet, every time starting the arc interlaces 180 °.
(4) strict control of when welding interlayer temperature, and interlayer temperature is not more than 80 ℃, and the angle welding height of heat exchanger tube and tube sheet exceeds tube sheet 2mm at least.
Claims (1)
1. the welding procedure of heat exchange equipment is characterized in that, comprises the steps:
(1) after the assembling of heat transmission equipment shell side is accomplished, clear up place to be welded, weld C2 class weld seam earlier, C2 class weld seam is shell-side cylinder and the right weld seam of tube sheet group; The welding of described C2 class weld seam; According to the corresponding manual metal-arc welding material of the material selection of shell-side cylinder and the tube sheet trade mark; Power type is a direct current; Polarity is reversal connection; Wherein bottom wlding specification is 80～110A for
welding current, arc voltage 19～21V; The second layer and the 3rd layer of wlding specification are 110～150A for
welding current, and arc voltage is 23～25V;
(2) after C2 class weld seam has welded, weld C1 class weld seam again, C1 class weld seam is the right weld seam of tube sheet and set of heat exchange tubes, and welding sequence is welded in strict accordance with " rice " font, promptly at first welds " ten " font, symmetry or skips welding then; The welding of described C1 class weld seam; Select the corresponding argon arc wlding trade mark for use according to the material of tube sheet and heat exchanger tube; Power type is a direct current; Polarity is for just connecing, and the wlding specification is 160～175A for
welding current, arc voltage 8.5～10V.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201010173296A CN101927389B (en) | 2010-05-17 | 2010-05-17 | Welding process of heat exchanger equipment |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201010173296A CN101927389B (en) | 2010-05-17 | 2010-05-17 | Welding process of heat exchanger equipment |
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| Publication Number | Publication Date |
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| CN101927389A CN101927389A (en) | 2010-12-29 |
| CN101927389B true CN101927389B (en) | 2012-10-17 |
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| Application Number | Title | Priority Date | Filing Date |
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| CN201010173296A Active CN101927389B (en) | 2010-05-17 | 2010-05-17 | Welding process of heat exchanger equipment |
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Families Citing this family (2)
| Publication number | Priority date | Publication date | Assignee | Title |
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| CN102717197B (en) * | 2012-06-20 | 2014-03-12 | 东方电气集团东方锅炉股份有限公司 | Deep-groove sealing weld tube plate deformation control method for flexible tube plates of heat exchanger with straight tubes |
| CN109454355A (en) * | 2018-12-28 | 2019-03-12 | 天津航天长征火箭制造有限公司 | A kind of thin-wall long and thin stainless steel tube erection welding morpheme size control method |
Citations (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| DE3144762A1 (en) * | 1981-11-11 | 1983-05-19 | Albrecht Ing.(grad.) 5090 Leverkusen Hesseler | Method of producing the tube nest of heat exchangers or the like and heat-exchanger tube nest produced according to this method |
| JP2611869B2 (en) * | 1990-11-01 | 1997-05-21 | 日野自動車工業株式会社 | Tube and plate welding method |
| CN1262423A (en) * | 2000-01-21 | 2000-08-09 | 华南理工大学 | Prestressed shell-and-tube heat exchanger and its manufacture method |
| CN1562517A (en) * | 2004-04-20 | 2005-01-12 | 牟有为 | Technique for manufacturing hot dip aluminizing heat exchanger |
| CN101474703A (en) * | 2009-01-21 | 2009-07-08 | 东方锅炉（集团）股份有限公司 | Seal welding method of shell type heat exchanger pipe sheet stainless steel composite layer and carbon steel tube |
Family Cites Families (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPS57100873A (en) * | 1980-12-15 | 1982-06-23 | Kobe Steel Ltd | Manufacture of multitubular type heat exchanger |
-
2010
- 2010-05-17 CN CN201010173296A patent/CN101927389B/en active Active
Patent Citations (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| DE3144762A1 (en) * | 1981-11-11 | 1983-05-19 | Albrecht Ing.(grad.) 5090 Leverkusen Hesseler | Method of producing the tube nest of heat exchangers or the like and heat-exchanger tube nest produced according to this method |
| JP2611869B2 (en) * | 1990-11-01 | 1997-05-21 | 日野自動車工業株式会社 | Tube and plate welding method |
| CN1262423A (en) * | 2000-01-21 | 2000-08-09 | 华南理工大学 | Prestressed shell-and-tube heat exchanger and its manufacture method |
| CN1562517A (en) * | 2004-04-20 | 2005-01-12 | 牟有为 | Technique for manufacturing hot dip aluminizing heat exchanger |
| CN101474703A (en) * | 2009-01-21 | 2009-07-08 | 东方锅炉（集团）股份有限公司 | Seal welding method of shell type heat exchanger pipe sheet stainless steel composite layer and carbon steel tube |
Non-Patent Citations (4)
| Title |
|---|
| JP昭57-100873A 1982.06.23 |
| JP第2611869号B2 1997.05.21 |
| 时鸿儒等.换热器管板的焊接变形与控制.《化学工业与工程技术》.2005,第26卷(第3期),第46-47页. * |
| 林虹.管壳式换热器换热管与管板焊接工艺.《安装》.2002,(第4期),第14-15页. * |
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| CN101927389A (en) | 2010-12-29 |
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Address after: 252211 Shandong city of Liaocheng province Dong'e County Gu Guan Tun Zhen Luxi Chemical Industrial Park Patentee after: LUXI INDUSTRY EQUIPMENT Co.,Ltd. Address before: 252000, Shandong, Liaocheng Economic Development Zone, Liaohe Road, south of the small river west of Mei River Patentee before: LUXI INDUSTRY EQUIPMENT Co.,Ltd. |