CN101954566B - Process for fixedly connecting titanium cooling tube in cooler and radiating fins and titanium tube plate - Google Patents
Process for fixedly connecting titanium cooling tube in cooler and radiating fins and titanium tube plate Download PDFInfo
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- CN101954566B CN101954566B CN2010101797732A CN201010179773A CN101954566B CN 101954566 B CN101954566 B CN 101954566B CN 2010101797732 A CN2010101797732 A CN 2010101797732A CN 201010179773 A CN201010179773 A CN 201010179773A CN 101954566 B CN101954566 B CN 101954566B
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Abstract
The invention relates to a process for fixedly connecting a titanium cooling tube in a cooler and radiating fins and a titanium tube plate, which comprises a process for expansion jointing of the titanium cooling tube and the radiating fins and expansion jointing of the titanium cooling tube and the titanium tube plate and a welding process for welding the titanium cooling tube and the titanium tube plate; the expansion jointing process comprises the following steps of: filling a lubricant into the titanium cooling tube, sleeving the radiating fins and the titanium tube plate on the titanium cooling tube, performing expansion positioning on one end of the titanium cooling tube and expanding the titanium cooling tube for the second time, wherein the expansion amount of the first expansion accounts for 30 to 40 percent of the required expansion amount and the expansion speed is 4mm/s; and in the welding process, the mark of a welding wire adopted in the welding is ERTi-1, the diameter of the welding wire is 1mm, pure argon with a purity of more than or equal to 99.98 percent is adopted in argon spotting, a cerium-tungsten electrode with the diameter phi of 2.0mm is used as the tungsten electrode, and a direct current tungsten inert gas (TIG) welder is adopted as the welding machine. In the invention, titanium materials can be used in the cooler to improve the corrosion resistance and slat corrosion resistance of the cooling tube and the tube plate in the cooler, so that the service life of the cooler is prolonged.
Description
Technical field
The present invention relates to the manufacturing technology field of cooler, refer more particularly in the cooler technology that is fixedly connected between the cooling tube and fin and cooling tube and tube sheet.
Background technology
Along with the develop rapidly of national economy, industrial enterprise vigorously grows up, and is increasingly high to the demand of electric power.No matter in developed country still in developing country, the electric power of environmental protection and economy is nuclear energy electric power the most reliably at present.The recirculated cooling water that is adopted in the cooler of nuclear power machine at present is most of to adopt highly-saline seawater and without the water for industrial use of advanced treating; Because sediment charge is bigger in this cooling water, so require cooling tube and tube sheet in the cooler must adopt the rotten material of anticorrosive, anti-salt.Therefore to adopt model mostly be that the iron white copper of Bfe30-1-1 is as material for cooling tube in the cooler of nuclear power machine and tube sheet; But model is the iron white copper material of Bfe30-1-1 still has 0.05mm/ to seawater a etching extent; And model is the costing an arm and a leg of iron white copper material of Bfe30-1-1, thereby has increased the manufacturing cost of cooler.
The core of cooler comprises the cooling tube that is positioned at the center, and the two ends of cooling tube are fixed with tube sheet, is densely covered with fin between the tube sheet, and described fin is sleeved on the cooling tube.Adopting model is cooling tube and the tube sheet of the iron white copper of Bfe30-1-1 as material; Since model be the intensity of iron white copper material of Bfe30-1-1 with chemism is less and linear expansion coefficient is bigger, the mode that employing once dilates between cooling tube and the fin is connected fixing; Adopt between cooling tube and the tube sheet once to dilate, again the fixed connection mode of welding.
Titanium class material and model are that the iron white copper material of Bfe30-1-1 is compared, and have stronger corrosion resistance and anti-salt corruption property.But if will titanium class material be used in cooler, because its intensity is with chemism is big and linear expansion coefficient is little, being fixedly connected between titanium cooling tube and fin and the titanium tube sheet is very difficult.
Summary of the invention
Technical problem to be solved by this invention is: the technology that is fixedly connected between the titanium cooling tube and fin and titanium tube sheet is provided in a kind of cooler.
For addressing the above problem; The technical scheme that the present invention adopts is: the technology that is fixedly connected of titanium cooling tube and fin and titanium tube sheet in the cooler; Comprise: the welding procedure between expanding joint process between titanium cooling tube and fin and titanium cooling tube and the titanium tube sheet and titanium cooling tube and the titanium tube sheet; Expanding joint process between described titanium cooling tube and fin and titanium cooling tube and the titanium tube sheet comprises the steps:
(1), packing lubrication agent in the titanium cooling tube, dry the back subsequent use;
(2), after cover on the titanium cooling tube is loaded onto fin and titanium tube sheet, at first use first to dilate die head and dilate the location, titanium cooling tube slippage when preventing to dilate at an end of titanium cooling tube; After dilating positioned, expander hole place is carried out dye penetrant inspection, can carry out next step after qualified;
(3), dilating die head with first dilates the titanium cooling tube; Dilate to be divided into and dilate for the first time and dilate for the second time; Dilate for the first time and be replaced with second after the completion and dilate die head and carry out dilating second time again, the amount of dilating that dilate the first time is that the speed that 30～40%, twice of the required amount of dilating dilates is 4mm/s; After for the second time dilating completion, the titanium cooling tube reaches the amount of dilating of setting;
(4), dilate end after, detect fin, guarantee fin and titanium cooling tube joint place non-loosening phenomenon; Remove unnecessary titanium cooling tube its port is flushed with the titanium tube sheet, must use oil gun that the machined position is cooled off and lubricated in the removal process;
Welding procedure between described titanium cooling tube and the titanium tube sheet comprises the steps:
(1), prepare before the weldering: the welding wire trade mark that welding is selected for use is ERTi-1, and gage of wire is 1mm; Argon point: adopt straight argon, purity >=99.98%; Tungsten electrode is selected the cerium tungsten electrode of Φ 2.0mm for use; Welding machine adopts the DC TIG welding machine, and welding torch adopts QS-75 °/500 type water-cooled tig torches;
(2), welding: 1., remove the burr, pipe of the titanium cooling tube mouth of pipe etc.;
2., remove face of weld and reach the foreign material near titanium tube sheet, the titanium cooling tube;
3., to carrying out ungrease treatment near face of weld and the groove;
4., welding condition: power type and characteristic: straight polarity direct current;
The welding number of plies: 1;
Tungsten electrode diameter: 2.0mm;
Electric current: 90～100A;
Weldering speed: 6～8cm/min;
Interlayer temperature:＜200 ℃;
Heat input: 2.4～6.7KT/cm;
Nozzle argon gas: 14～15L/min;
The argon shield time: 30～60s;
5., the face of weld acid wash passivation handles: the acid wash passivation processing is carried out in butt welded seam and the zone of influence, after the pickling immediately water wash the mouth of pipe, whole acid cleaning process temperature is controlled at below 40 ℃;
6., Welding Testing: all weld seams are carried out painted, guarantee that no any crack and oxidative phenomena produce.
In the expanding joint process between titanium cooling tube and fin and titanium cooling tube and the titanium tube sheet, the die head that dilates of titanium cooling tube adopts the wolfram steel material, and quenching hardness is HRC65～75, and surface roughness is Ra0.8.
In the expanding joint process between titanium cooling tube and fin and titanium cooling tube and the titanium tube sheet, described lubricant is formed by butter and the carbon even mixing preparation of ratio according to 1: 1.
In the welding procedure between titanium cooling tube and the titanium tube sheet, prepare the step preface before the weldering and also comprise: the weld zone metal is in receptor 1 activity gas N, O, H and objectionable impurities Elements C, Fe, Mn pollution more than 250 ℃; The weld zone can not form the bullion crystallization; The weld zone can not produce welding lines stress and lines distortion; Welding wire surface cleaning, non-scale, crackle and scabbing and slag inclusion.
The invention has the beneficial effects as follows: titanium class material is used in the cooler; Improved the rotten performance of anticorrosive, anti-salt of cooling tube and tube sheet in the cooler; Thereby improved the service life of cooler, reduced frequent maintenance, produced huge economic benefit and social benefit.
Description of drawings
Fig. 1 is the mounting structure sketch map between titanium cooling tube among the present invention, fin and the titanium tube sheet;
Among the figure: 1, titanium cooling tube, 2, fin, 3, the titanium tube sheet, 4, dilate die head.
The specific embodiment
Below in conjunction with accompanying drawing titanium cooling tube in the cooler of the present invention is done further to describe in detail with the technology that is fixedly connected of fin and titanium tube sheet.
As shown in Figure 1; The technology that is fixedly connected of titanium cooling tube 1 and fin 2 and titanium tube sheet 3; Comprise: the expanding joint process between titanium cooling tube 1 and fin 2 and titanium cooling tube 1 and the titanium tube sheet 3, and titanium cooling tube 1 and titanium tube sheet 3 between welding procedure; Expanding joint process between described titanium cooling tube 1 and fin 2 and titanium cooling tube 1 and the titanium tube sheet 3 comprises the steps:
(1), packing lubrication agent in titanium cooling tube 1, it is subsequent use to dry the back, described lubricant is formed by butter and the carbon even mixing preparation of ratio according to 1: 1;
(2), after cover on the titanium cooling tube 1 is loaded onto fin 2 and titanium tube sheet 3, at first use first to dilate die head and dilate the location at an end of titanium cooling tube 1, titanium cooling tube 1 slippage when preventing to dilate; After dilating positioned, dye penetrant inspection is located to carry out in the expander hole, can carry out next step with managing to ftracture to exist on titanium tube sheet 3 surfaces and the no any crackle of titanium cooling tube 1 pore detection; Wherein the die head 4 that dilates of titanium cooling tube 1 comprises that first dilates die head and second and dilate die head, and it all adopts the wolfram steel material, and quenching hardness is HRC65～75, and surface roughness is Ra0.8;
(3), use first to dilate die head titanium cooling tube 1 is dilated; Dilate to be divided into and dilate for the first time and dilate for the second time; Dilate for the first time and be replaced with second after the completion and dilate die head and carry out dilating second time again, the amount of dilating that dilate the first time is that the speed that 30～40%, twice of the required amount of dilating dilates is 4mm/s; After for the second time dilating completion, titanium cooling tube 1 reaches the amount of dilating of setting; For example: the original caliber of titanium cooling tube 1 is Φ 13.25, and the caliber after then dilating for the first time is Φ 13.35, and caliber and final goal caliber after dilating for the second time are Φ 13.55;
(4), dilate end after, stir fin, guarantee fin and titanium cooling tube 1 joint place non-loosening phenomenon, guarantee that the applying rate is between 90%～95%; Removing unnecessary titanium cooling tube 1 makes its port flush with titanium tube sheet 3; Must use oil gun that the machined position is cooled off and lubricated in the removal process; Because of titanium cooling tube 1 through dilate and metal cut mill after, the work hardening phenomenon has taken place, as dilating sealing between the end of titanium cooling tube 1 and the titanium tube sheet 3 again; Certainly will cause titanium cooling tube 1 cracking, so being fixedly connected between the end of titanium cooling tube 1 and the titanium tube sheet 3 all adopted welding;
Welding procedure between titanium cooling tube 1 and the titanium tube sheet 3 comprises the steps:
(1), prepare before the weldering: the weld zone metal is in not pollutions such as receptor 1 activity gas N, O, H and objectionable impurities Elements C, Fe, Mn more than 250 ℃; The weld zone can not form the bullion crystallization; The weld zone can not produce welding lines stress and lines distortion; The welding wire trade mark that welding is selected for use is ERTi-1, and gage of wire is 1mm, and the chemical composition of this welding wire and mechanical property are suitable with the titanium material, have than high-ductility; Welding wire surface cleaning, non-scale, crackle and scabbing and slag inclusion etc.; Argon point: adopt straight argon, purity >=99.98%; Tungsten electrode is selected the cerium tungsten electrode of Φ 2.0mm for use; Welding machine adopts the DC TIG welding machine, and welding torch adopts QS-75 °/500 type water-cooled tig torches;
(2), welding: 1., remove the burr, pipe of titanium cooling tube 1 mouth of pipe etc.;
2., the foreign material that near scale, paint booty, dust and ability use austenite, stainless steel wire brush removing face of weld reach on titanium tube sheet 3, the titanium cooling tube 1 and titanium react;
3., near ungrease treatment: be stained with no sulphur ethanol or acetone to all carrying out ungrease treatment face of weld and the groove with sponge;
4., welding condition: power type and characteristic: straight polarity direct current;
The welding number of plies: 1;
Tungsten electrode diameter: 2.0mm;
Electric current: 90～100A;
Weldering speed: 6～8cm/min;
Interlayer temperature:＜200 ℃;
Heat input: 2.4～6.7KT/cm;
Nozzle argon gas: 14～15L/min;
The argon shield time: 30～60s;
5., the face of weld acid wash passivation handles: the acid wash passivation processing is carried out in butt welded seam and the zone of influence, after the pickling immediately water wash the mouth of pipe, whole acid cleaning process temperature is controlled at below 40 ℃;
6., Welding Testing: all weld seams are carried out painted, guarantee that no any crack and oxidative phenomena produce.
Claims (4)
1. the technology that is fixedly connected of titanium cooling tube and fin and titanium tube sheet in the cooler; Comprise: the welding procedure between expanding joint process between titanium cooling tube and fin and titanium cooling tube and the titanium tube sheet and titanium cooling tube and the titanium tube sheet; It is characterized in that: the expanding joint process between described titanium cooling tube and fin and titanium cooling tube and the titanium tube sheet comprises the steps:
(1), packing lubrication agent in the titanium cooling tube, dry the back subsequent use;
(2), after cover on the titanium cooling tube is loaded onto fin and titanium tube sheet, at first use first to dilate die head and dilate the location, titanium cooling tube slippage when preventing to dilate at an end of titanium cooling tube; After dilating positioned, expander hole place is carried out dye penetrant inspection, can carry out next step after qualified;
(3), dilating die head with first dilates the titanium cooling tube; Dilate to be divided into and dilate for the first time and dilate for the second time; Dilate for the first time and be replaced with second after the completion and dilate die head and carry out dilating second time again, the amount of dilating that dilate the first time is that the speed that 30 ~ 40%, twice of the required amount of dilating dilates is 4mm/s; After for the second time dilating completion, the titanium cooling tube reaches the amount of dilating of setting;
(4), dilate end after, detect fin, guarantee fin and titanium cooling tube joint place non-loosening phenomenon; Remove unnecessary titanium cooling tube its port is flushed with the titanium tube sheet, must use oil gun that the machined position is cooled off and lubricated in the removal process;
Welding procedure between described titanium cooling tube and the titanium tube sheet comprises the steps:
(1), prepare before the weldering: the welding wire trade mark that welding is selected for use is ERTi-1, and gage of wire is 1mm; Argon gas: adopt straight argon, purity >=99.98%; Tungsten electrode is selected the cerium tungsten electrode of Φ 2.0mm for use; Welding machine adopts the DC TIG welding machine, and welding torch adopts QS-75 °/500 type water-cooled tig torches;
(2), welding: 1., remove burr, the pipe of the titanium cooling tube mouth of pipe;
2., remove face of weld and reach the foreign material near titanium tube sheet, the titanium cooling tube;
The welding number of plies: 1;
Tungsten electrode diameter: 2.0mm;
Electric current: 90 ~ 100A;
Weldering speed: 6 ~ 8cm/min;
Interlayer temperature:＜200 ℃;
Heat input: 2.4 ~ 6.7KT/cm;
Nozzle argon gas: 14 ~ 15L/min;
The argon shield time: 30 ~ 60s;
2. the technology that is fixedly connected of titanium cooling tube and fin and titanium tube sheet in the cooler according to claim 1; It is characterized in that: in the expanding joint process between titanium cooling tube and fin and titanium cooling tube and the titanium tube sheet; The die head that dilates of titanium cooling tube adopts the wolfram steel material; Quenching hardness is HRC65 ~ 75, and surface roughness is Ra0.8.
3. the technology that is fixedly connected of titanium cooling tube and fin and titanium tube sheet in the cooler according to claim 1 and 2; It is characterized in that: in the expanding joint process between titanium cooling tube and fin and titanium cooling tube and the titanium tube sheet, described lubricant is formed by butter and the carbon even mixing preparation of ratio according to 1:1.
4. the technology that is fixedly connected of titanium cooling tube and fin and titanium tube sheet in the cooler according to claim 1 and 2; It is characterized in that: in the welding procedure between titanium cooling tube and the titanium tube sheet, prepare the step preface before the weldering and also comprise: the weld zone metal is in receptor 1 activity gas nitrogen, hydrogen and objectionable impurities Elements C, Fe, Mn pollution more than 250 ℃; The weld zone can not form the bullion crystallization; The weld zone can not produce welding lines stress and lines distortion; Welding wire surface cleaning, non-scale, crackle and scabbing and slag inclusion.
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| CN2010101797732A CN101954566B (en) | 2010-05-19 | 2010-05-19 | Process for fixedly connecting titanium cooling tube in cooler and radiating fins and titanium tube plate |
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| CN2010101797732A CN101954566B (en) | 2010-05-19 | 2010-05-19 | Process for fixedly connecting titanium cooling tube in cooler and radiating fins and titanium tube plate |
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| CN103252400B (en) * | 2012-02-17 | 2016-03-09 | 珠海格力电器股份有限公司 | A kind of method that tube sheet and pipe expanded joint seal |
| CN104070341B (en) * | 2014-07-09 | 2017-01-25 | 常州敏杰电器有限公司 | Device for installing sheet cooling fins in sleeved mode |
| CN104242556B (en) * | 2014-09-24 | 2017-04-19 | 张家港市恒强冷却设备有限公司 | Air cooler for nuclear power steam turbine generators |
| CN104801903A (en) * | 2015-04-21 | 2015-07-29 | 常熟锐钛金属制品有限公司 | Device for welding titanium tube and stainless steel tube plate |
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| CN111085625A (en) * | 2019-12-31 | 2020-05-01 | 黄石市高耐斯热工设备有限公司 | Pipe expanding device, bearing cooler and pipe expanding method of bearing cooler |
| CN115162824B (en) * | 2022-09-07 | 2023-01-31 | 中化二建集团有限公司 | Installation and construction method of carbonization tower |
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| US4586250A (en) * | 1983-10-03 | 1986-05-06 | Westinghouse Electric Corp. | Apparatus for sleeving tubes in hostile environments |
| US5267610A (en) * | 1992-11-09 | 1993-12-07 | Carrier Corporation | Heat exchanger and manufacturing method |
| CN2304484Y (en) * | 1997-05-26 | 1999-01-20 | 蔡清源 | Improved pipe expander for pipe heat exchanger |
| CN2387989Y (en) * | 1999-08-25 | 2000-07-19 | 蔡清源 | Heat exchanger tube expander |
| JP3784626B2 (en) * | 2000-09-20 | 2006-06-14 | 住友軽金属工業株式会社 | Manufacturing method of heat exchangers with internally grooved heat transfer tubes |
| JP4297794B2 (en) * | 2003-02-20 | 2009-07-15 | 三菱電機株式会社 | Tube expansion device for heat exchanger |
| CN100541104C (en) * | 2003-12-15 | 2009-09-16 | 臼井国际产业株式会社 | Heat exchanger |
| CN201387270Y (en) * | 2009-02-24 | 2010-01-20 | 陈卫东 | Radiator |
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