CN1033627C - Method for manufacturing reinforced heat transfer pipe and heat transfer plate with composite mesh on inner and outer surfaces of low-carbon steel - Google Patents
Method for manufacturing reinforced heat transfer pipe and heat transfer plate with composite mesh on inner and outer surfaces of low-carbon steel Download PDFInfo
- Publication number
- CN1033627C CN1033627C CN 93112898 CN93112898A CN1033627C CN 1033627 C CN1033627 C CN 1033627C CN 93112898 CN93112898 CN 93112898 CN 93112898 A CN93112898 A CN 93112898A CN 1033627 C CN1033627 C CN 1033627C
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- Prior art keywords
- heat transfer
- low
- carbon steel
- mild steel
- welding
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- Expired - Fee Related
Links
- 229910001209 Low-carbon steel Inorganic materials 0.000 title claims abstract description 28
- 238000000034 method Methods 0.000 title claims abstract description 19
- 238000004519 manufacturing process Methods 0.000 title claims abstract description 8
- 239000002131 composite material Substances 0.000 title abstract description 4
- 229910052751 metal Inorganic materials 0.000 claims abstract description 21
- 239000002184 metal Substances 0.000 claims abstract description 21
- 238000003466 welding Methods 0.000 claims abstract description 21
- 239000011148 porous material Substances 0.000 claims abstract description 3
- 239000002905 metal composite material Substances 0.000 claims description 3
- 238000005728 strengthening Methods 0.000 claims description 3
- 239000012528 membrane Substances 0.000 abstract description 2
- 238000001704 evaporation Methods 0.000 abstract 1
- 230000008020 evaporation Effects 0.000 abstract 1
- 238000000526 short-path distillation Methods 0.000 abstract 1
- 239000000463 material Substances 0.000 description 7
- 239000010410 layer Substances 0.000 description 5
- 238000009835 boiling Methods 0.000 description 3
- CSCPPACGZOOCGX-UHFFFAOYSA-N Acetone Chemical compound CC(C)=O CSCPPACGZOOCGX-UHFFFAOYSA-N 0.000 description 2
- 238000001816 cooling Methods 0.000 description 2
- 230000004927 fusion Effects 0.000 description 2
- 238000010438 heat treatment Methods 0.000 description 2
- 229910045601 alloy Inorganic materials 0.000 description 1
- 239000000956 alloy Substances 0.000 description 1
- 239000004411 aluminium Substances 0.000 description 1
- 229910052782 aluminium Inorganic materials 0.000 description 1
- XAGFODPZIPBFFR-UHFFFAOYSA-N aluminium Chemical compound [Al] XAGFODPZIPBFFR-UHFFFAOYSA-N 0.000 description 1
- 230000003416 augmentation Effects 0.000 description 1
- 239000012459 cleaning agent Substances 0.000 description 1
- 150000001875 compounds Chemical class 0.000 description 1
- 238000000354 decomposition reaction Methods 0.000 description 1
- 238000009792 diffusion process Methods 0.000 description 1
- 238000009826 distribution Methods 0.000 description 1
- 238000010285 flame spraying Methods 0.000 description 1
- 230000002427 irreversible effect Effects 0.000 description 1
- 239000007788 liquid Substances 0.000 description 1
- 238000012423 maintenance Methods 0.000 description 1
- 239000000203 mixture Substances 0.000 description 1
- 238000006116 polymerization reaction Methods 0.000 description 1
- 238000003672 processing method Methods 0.000 description 1
- 238000005086 pumping Methods 0.000 description 1
- 238000005245 sintering Methods 0.000 description 1
- 239000002344 surface layer Substances 0.000 description 1
- 238000009736 wetting Methods 0.000 description 1
Landscapes
- Pressure Welding/Diffusion-Bonding (AREA)
Abstract
The present invention provides a method for manufacturing reinforced heat transfer element, said invention can make the heat transfer element have more high-effective reinforced heat transfer process, and is characterized by that it adopts the hot-press welding method on the internal and external surfaces of low-carbon steel metal tube or metal plate, and the vacuum degree in the vacuum welding chamber is 10-2And when the temperature is 900 ℃ and the external load is 13MPa, firmly welding the low-carbon steel wire mesh (with the average pore diameter of more than 5 microns and one layer to multiple layers) with the low-carbon steel metal pipe or metal plate within 10 minutes to prepare the low-carbon steel metal inner and outer surface composite mesh reinforced heat transfer pipe and heat transfer plate. Can be used for manufacturing heat exchange equipment, membrane evaporation equipment, short-path distillation equipment and the like.
Description
The present patent application is that original applying number is 91100831.4, and the applying date is on February 13rd, 91, and denomination of invention is divided an application for " metal composite mesh on two surfaces intensify heat transfer pipe and heat transfer plate ".
The invention belongs to the manufacture method of strengthening heat transfer element.
The cover layer of having porous or other geometry at the metal surfaces externally and internally of unlike material is one of effective ways of augmentation of heat transfer, and it can adopt multiple manufacture method to obtain.
From reported in literature as can be known, commonplace in the world manufacture method mostly is sintering process, mechanical processing method, galvanoplastic and flame spraying at present.Their weak point is a hole irregularity, connective poor.
The purpose of this invention is to provide a kind of a kind of strengthening heat transfer that is different from above-mentioned all multi-methods, reduce heat transfer temperature difference, the composite web intensify heat transfer pipe that improves critical thermal load and the manufacture method of heat transfer plate.
Technical scheme of the present invention is the surfaces externally and internally of the metal tube of mild steel or metallic plate to be adopted the method for thermocompression bonding, is 10 in the indoor vacuum of vacuum welding
-2Pa, temperature is 900 ℃, and when plus load was 13MPa, (average pore size was more than 5 microns through 10 minutes woven wires with mild steel, one deck is to multilayer) realize firm welding with the metal tube or the metallic plate of mild steel, make the metal composite mesh on two surfaces intensify heat transfer pipe and the heat transfer plate of mild steel.
Process conditions for the thermocompression bonding of the woven wire of the metal tube of mild steel or metallic plate and mild steel are as described below: (table is seen the literary composition back)
Specific operation process to the silk screen thermocompression bonding of the metal tube of mild steel or plate and mild steel is:
1. the welding front surface is handled: the metal tube of mild steel or plate are adopted cleaning agent such as acetone remove the greasy dirt of face of weld, also take identical method to remove greasy dirt to the woven wire of mild steel.
2. preheating and intensification: the weldment of handling well is placed in the vacuum welding machine immediately by predetermined ordering, and vacuum chamber is sealed, begin vacuum pumping then.
Welding method of the present invention usually requires to carry out in that vacuum welding is indoor, to guarantee that material is not oxidated and to pollute.(to mild steel is 10 when vacuum reaches the given numerical value of table
-2Pa) after, begin, weldment is heated to the given welding temperature of table the weldment pre-heating temperature elevation.The foundation that welding temperature is selected is 0.6～0.8 of the fusion temperature that is generally metal and alloy of the welding temperature to same material, temperature during to the metal tube of mild steel or plate and the thermocompression bonding of mild steel silk screen is 900 ℃, and the welding temperature of dissimilar metal be get the low metal of fusing point fusion temperature 0.6～0.86.
3. thermocompression bonding: after temperature reaches welding temperature, begin to be applied with the given plus load of table, show the given time (is 10 minutes to mild steel) in maintenances, make interatomic diffusion motion can pass through the joint face of welding material and carried out fully.
The plus load of welding pressure during to the woven wire pressure welding of the metal tube of mild steel or plate and mild steel is 13MPa.
4. cooling: after the given time, welding finished by last table, stop heating, weldment is in a vacuum with coming out of the stove after the stove cooling.
Advantage of the present invention is:
One, adopt the thermocompression bonding method can be on the metal tube surfaces externally and internally of mild steel be compound identical type woven wire and make the metal surface antipriming pipe.Generally every welding layer of metal silk screen just can make heat transfer area than the long-pending increase of original smooth surface more than 2 times; Its porosity is up to 45～75%, and the average equivalent aperture can be selected arbitrarily more than 5 microns, and pore-size distribution is very even; Porous layer thickness is also than uniformity, and the porous layer average thickness can be determined its number of plies arbitrarily more than 0.05 millimeter the time; Improve more than 10 times in boiling heat transfer film coefficient under the porous layer condition than plain tube; The mass transfer film coefficient improves more than 3 times than plain tube.
Two, the wicking property that evenly is interconnected of the height that in porous surface layer as thin as a wafer, forms, can make liquid film extremely be evenly distributed in the inside and outside of whole heat and mass wall as thin as a wafer, and assurance is fully wetting, thereby prevents dried wall phenomenon effectively, has improved critical thermal load.
Three, under extremely low heat transfer temperature difference, just can provide a large amount of stable nucleus of boiling, thereby reduce the irreversible loss and the hysteresis of conducting heat, and the boiling degree of superheat is reduced greatly.Conduct heat and mass transfer so be particularly suitable for the membrane type of heat sensitive material, avoided at high temperature being easy to generate the difficulty of polymerization or decomposition.
| The project material | The intermediate course material | Temperature ℃ | Plus load MPa | Time min | Vacuum Pa |
| Mild steel and mild steel | ???900 | ????13 | ????10 | ????10 -2 |
Claims (1)
1. the manufacture method of a strengthening heat transfer element is characterized in that surfaces externally and internally at the metal tube of mild steel or metallic plate adopts the method for thermocompression bonding, is 10 in the indoor vacuum of vacuum welding
-2Pa, temperature are that 900 ℃, plus load are 13MPa, (average pore size was more than 5 microns through 10 minutes woven wires with mild steel, one deck is to multilayer) realize firm welding with the metal tube or the metallic plate of mild steel, make the metal composite mesh on two surfaces intensify heat transfer pipe or the heat transfer plate of mild steel.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN 93112898 CN1033627C (en) | 1993-12-22 | 1993-12-22 | Method for manufacturing reinforced heat transfer pipe and heat transfer plate with composite mesh on inner and outer surfaces of low-carbon steel |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN 93112898 CN1033627C (en) | 1993-12-22 | 1993-12-22 | Method for manufacturing reinforced heat transfer pipe and heat transfer plate with composite mesh on inner and outer surfaces of low-carbon steel |
Related Parent Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN 91100831 Division CN1028900C (en) | 1991-02-13 | 1991-02-13 | Heat transmitting tubes and plates reinforced with metal mesh at both inner and outer surfaces |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| CN1089536A CN1089536A (en) | 1994-07-20 |
| CN1033627C true CN1033627C (en) | 1996-12-25 |
Family
ID=4990309
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN 93112898 Expired - Fee Related CN1033627C (en) | 1993-12-22 | 1993-12-22 | Method for manufacturing reinforced heat transfer pipe and heat transfer plate with composite mesh on inner and outer surfaces of low-carbon steel |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN1033627C (en) |
Families Citing this family (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN102288060A (en) * | 2011-06-13 | 2011-12-21 | 苏州新太铜高效管有限公司 | Film falling evaporation heat exchange pipe with fins made from silk screen |
| CN104342734B (en) * | 2013-08-06 | 2017-07-18 | 中国科学院苏州纳米技术与纳米仿生研究所 | Aluminium with enhanced foam nucleate boiling heat transfer function and preparation method thereof |
| CN110385382A (en) * | 2019-08-08 | 2019-10-29 | 东莞市纵鑫电子科技有限公司 | The manufacture craft for the composite heating panel that punching press is combined with hot pressing |
| CN110369854B (en) * | 2019-08-08 | 2022-08-30 | 广东省纵鑫电子科技有限公司 | Manufacturing process of hot-pressing type composite heat dissipation plate |
| CN111174626A (en) * | 2019-11-21 | 2020-05-19 | 广州铁路职业技术学院（广州铁路机械学校） | Heat exchange sheet, heat exchanger and manufacturing method of heat exchange sheet |
| CN110953921A (en) * | 2019-11-21 | 2020-04-03 | 广州铁路职业技术学院（广州铁路机械学校） | Heat exchange sheet, heat exchanger and manufacturing method of heat exchange sheet |
-
1993
- 1993-12-22 CN CN 93112898 patent/CN1033627C/en not_active Expired - Fee Related
Also Published As
| Publication number | Publication date |
|---|---|
| CN1089536A (en) | 1994-07-20 |
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