CN104874987A - Machining technology for falling film evaporation heat exchange plate with turbulent flow channel - Google Patents
Machining technology for falling film evaporation heat exchange plate with turbulent flow channel Download PDFInfo
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- CN104874987A CN104874987A CN201510367660.8A CN201510367660A CN104874987A CN 104874987 A CN104874987 A CN 104874987A CN 201510367660 A CN201510367660 A CN 201510367660A CN 104874987 A CN104874987 A CN 104874987A
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- heat exchange
- exchange plate
- plate
- swollen
- turbulent
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- B—PERFORMING OPERATIONS; TRANSPORTING
- B23—MACHINE TOOLS; METAL-WORKING NOT OTHERWISE PROVIDED FOR
- B23P—METAL-WORKING NOT OTHERWISE PROVIDED FOR; COMBINED OPERATIONS; UNIVERSAL MACHINE TOOLS
- B23P15/00—Making specific metal objects by operations not covered by a single other subclass or a group in this subclass
- B23P15/26—Making specific metal objects by operations not covered by a single other subclass or a group in this subclass heat exchangers or the like
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- B—PERFORMING OPERATIONS; TRANSPORTING
- B23—MACHINE TOOLS; METAL-WORKING NOT OTHERWISE PROVIDED FOR
- B23P—METAL-WORKING NOT OTHERWISE PROVIDED FOR; COMBINED OPERATIONS; UNIVERSAL MACHINE TOOLS
- B23P2700/00—Indexing scheme relating to the articles being treated, e.g. manufactured, repaired, assembled, connected or other operations covered in the subgroups
- B23P2700/10—Heat sinks
Abstract
The invention discloses a machining technology for a falling film evaporation heat exchange plate with a turbulent flow channel. The machining technology includes the following steps that 1, metal plates are selected; 2, stitch welding is carried out on the two metal plates to form the heat exchange plate; 3, the heat exchange plate is distressed; 4, a swaging tool is used for swaging the heat exchange plate, and a connecting pipe is welded to the swaged position; 5, the heat exchange plate is expanded; 6, reinforcing ribs are welded to edges of the expanded heat exchange plate; 7, the double faces of the heat exchange plate are polished; 8, leakage of the metal plates is detected; 9, the turbulent flow channel in the heat exchanger plate is cleaned. The heat exchange plate does not deform in the welding process and can be welded firmly, and therefore the problem of welding deformation and insecurity caused when sheets are used for manufacturing the heat exchange plate of a plate heat exchanger is well solved.
Description
Technical field
The invention belongs to board-like device heat exchange plate processing technique field, particularly relate to a kind of falling film evaporation heat exchange plate processing technology with turbulent runner.
Background technology
The heat exchanger plate of the plate type heat exchanger particularly plate type heat exchanger of refrigeration plant evaporimeter, generally goes out runner by two stamped metal sheets and carries out butt welding again and form.For heat exchanger plate, wallboard its heat transmission resistance thicker of heat exchanger is larger, and heat transfer efficiency is lower.Although thin plate is conducive to heat exchange, thin then poor rigidity crossed by plate, plate can be caused to be out of shape and even form leak source, not prison welding etc., easily causing the change of refrigerant flow path, affecting the heat transfer effect of heat exchange plate when welding; Particularly for the corrosion resistant plate that 0.8mm ~ 1.2mm is thick, be greater than 0.5m at breadth
2time above, distortion is larger.Therefore, adopt traditional punching press welding procedure again, be not suitable for the plate of the corrosion resistant plate making plate type heat exchanger adopting 0.8mm ~ 1.2mm thick.In addition, when steel plate is thinner, intensity also can reduce, for the effect by pressure medium during heat exchanger, and compressive strain of holding when runner also can be caused wider.
Therefore, how to utilize thin plate (thickness 0.8mm ~ 1.2mm) to carry out the processing of heat exchange plate, become the technical problem that those skilled in the art are badly in need of solving.
Summary of the invention
For prior art above shortcomings, the object of the present invention is to provide a kind of falling film evaporation heat exchange plate processing technology with turbulent runner being applicable to thin plate making heat exchange plate.
In order to solve the problems of the technologies described above, the technical solution used in the present invention is such: a kind of falling film evaporation heat exchange plate processing technology with turbulent runner, it is characterized in that, this processing technology comprises the steps:
1) choose the metallic plate of thickness at 0.8mm-1.2mm, and cut out and smooth to designed size;
2) by after two metallic plate overlaps, to be put on workbench and with hold down gag, two metallic plates to be pressed and scraped, then utilizing laser focusing plumb joint to carry out stitch welding to two metallic plates according to heat exchanger plates turbulent flow channel shape and form heat exchange plate; Wherein, stitch welding position comprise two metallic plates edge, for the formation of the solder joint in several isolation bonding wires of snakelike turbulent runner and some distributions and turbulent runner;
3) heat exchanging plate carries out destressing process;
4) the swollen mouth frock of the heat exchange plate after destressing process is clamped, then carry out swollen mouth with swaging tool heat exchanging plate, and in the welding adapter of swollen mouth place; Wherein, described swollen mouth is two, and the position of two swollen mouths is corresponding with the position at turbulent runner two ends, and is connected with turbulent runner;
5) heat exchange plate after swollen mouth is put into swollen type on the swollen mould of plate, the pit depth formed after making swollen type is 4-4.5mm, and detects swollen moldeed depth degree;
6) the edge welding reinforcement of the heat exchange plate after swollen type, described reinforcement is by coated for the edge of two metallic plates of heat exchange plate;
7) heat exchange plate after coated reinforcement is sent into sand-blasting machine, the two-sided of heat exchanging plate is polished;
8), after heat exchange plate polishes smooth, metallic plate leak detection is carried out;
9) last, the turbulent runner of qualified heat exchange plate inside of hunting leak is cleaned.
Further, step 2) in, the distance between the solder joint in described turbulent runner and the distance between solder joint and turbulent runner edge are 60-70mm; Like this, be not only conducive to fluid and in runner, form turbulent flow with augmentation of heat transfer, and solder joint improves heat exchanger runner place network structure, mechanics is stressed good, by force structural, in use deformation can not occur.
Further, step 2) in, described hold down gag comprises nip rolls and binder beam, and described binder case bay is 200-300mm.
Further, due to heat treatment destressing technique, easily form oxide skin at metal sheet surface and destroy the stress tissue of weld when being subject to processing; Therefore, in step 3), destressing process adopts spectrum harmonics stress eliminating device, utilizes vibratory stress reliefing.
Further, in step 5), in swollen type process, adapter is connected with hydraulic press high-pressure hose, then to water filling in heat exchange plate, the runner in heat exchange plate is outwards expanded, after expansion molding, pressurize 10-20 minute; Thus make swollen type stability better.
Further, in step 5), in swollen type process, centered by solder joint, detect the degree of depth of solder joint place pit, be no more than 4.3mm when pit depth reaches 4mm, stop pressurization, enter packing stage; After pressurize terminates, sampling Detection is carried out to pit depth; Thus effectively ensure the accuracy of swollen type.
Further, in step 9), in cleaning process, adapter is connected respectively with alcohol pump feed pipe and recovery tube respectively, with industrial alcohol, turbulent runner is rinsed at least 1 hour.Thus guarantee that the inner welding slag of heat exchange plate rinses, prevent welding slag blocking pipe.
Compared with prior art, tool of the present invention has the following advantages:
1. adopt and first carry out welding procedure, and two metallic plates compacted pressing when welding, therefore indeformable and firm welding during welding.
2. form runner, therefore, it is possible to ensure the shape of the heat exchanger plate made for the thin plate that 0.8mm ~ 1.2mm is thick by inwardly passing into pressurized with fluid expansion again after welding; During expansion welding position or around it position be clamped, welding position can not be made during expansion to be torn.
3. machining process is fairly simple, solves the heat exchange plate welding deformation with thin plate plate type heat exchanger and insecure problem well, and heat exchange plate made by the thin plate being applicable to 0.8mm ~ 1.2mm thick.
4. heat exchanging plate processing technology is optimized, thus makes practical, and processes more convenient, and heat exchange plate stability is better.
Accompanying drawing explanation
Fig. 1 is process chart of the present invention.
Fig. 2 is the schematic diagram in the bright stitch welding process of this law.
Fig. 3 is the plane of heat exchange plate.
Fig. 4 is the sectional view of heat exchange plate.
In figure: 1-hold down gag, 2-laser focusing plumb joint, 3-metallic plate, 4-reinforcement, 5-solder joint, 6-adapter, 7-turbulent runner.
Detailed description of the invention
Below in conjunction with drawings and Examples, the invention will be further described.
Embodiment: see Fig. 1 to Fig. 4, a kind of falling film evaporation heat exchange plate processing technology with turbulent runner, this processing technology comprises the steps:
1) choose the metallic plate 3 of thickness at 0.8mm-1.2mm, and cut out and smooth to designed size.
2) by after two metallic plate 3 overlaps, be put on workbench and also with hold down gag 1, two metallic plates 3 pressed and scraped, then utilize laser focusing plumb joint 2 to carry out stitch welding to two metallic plates 3 according to heat exchanger plates turbulent runner 7 shape and form heat exchange plate; Wherein, stitch welding position comprise two metallic plates 3 edge, for the formation of the solder joint 5 in several isolation bonding wires of snakelike turbulent runner 7 and some distributions and turbulent runner 7.Described hold down gag 1 comprises nip rolls and binder beam, and described binder case bay is 200-300mm, to avoid causing welding position deformation because spacing is excessive.That nip rolls motion in front and back makes overlapping thin plate move to weld, and now binder beam does not compress, and when spot welding, binder beam compresses at toe edge and isolation bonding wire.The energy density of laser focusing plumb joint 2 is greater than 106W/cm2, and like this, without any need for filler in welding process, and welding heat affected zone is within 2mm, and welding deformation is also smaller.Laser weld requires do not have gap in the middle of two plates, is compressed realize by binder beam or nip rolls.Distance between solder joint 5 in described turbulent runner 7 and the distance between solder joint 5 and turbulent runner 7 edge are 60-70mm; Like this, be not only conducive to fluid and in runner, form turbulent flow with augmentation of heat transfer, and solder joint 5 improves heat exchanger runner place network structure, mechanics is stressed good, by force structural, in use deformation can not occur.
3) heat exchanging plate carries out destressing process; Due to heat treatment destressing technique, easily form oxide skin on metallic plate 3 surface when being subject to processing and destroy the stress tissue of weld; Therefore, in step 3), destressing process adopts spectrum harmonics stress eliminating device, utilizes vibratory stress reliefing; Thus the distortion that minimizing Stress Release is in use brought.
4) the swollen mouth frock of the heat exchange plate after destressing process is clamped, then carry out swollen mouth with swaging tool heat exchanging plate, and in the welding adapter 6 of swollen mouth place; Wherein, described swollen mouth is two, and the position of two swollen mouths is corresponding with the position at turbulent runner 7 two ends, and is connected with turbulent runner 7.During concrete enforcement, plate after eliminating stress is hung on workbench, with swollen mouth frock by three sides (side at the place, two ends of non-turbulent runner 7) of heat exchange plate clamping and carry out swollen mouth with swaging tool, then plate is stood up, adapter 6 is docked with swollen mouth and welds.
5) heat exchange plate after swollen mouth is put into swollen type on the swollen mould of plate, the degree of depth of the pit formed after making swollen type is 4-4.5mm, and detects swollen moldeed depth degree.In swollen type process, plate is hung in hydraulic press workbench face, adapter 6 is connected with hydraulic press high-pressure hose, then to water filling in heat exchange plate, the runner in heat exchange plate is outwards expanded, after expansion molding, pressurize 10-20 minute; Thus make swollen type stability better.During concrete enforcement, centered by solder joint 5, detect the degree of depth of solder joint 5 place pit, be no more than 4.3mm(usually when pit depth reaches 4mm, hydraulic pressure is now 11Mpa), stop pressurization, enter packing stage; After pressurize terminates, sampling Detection is carried out to pit depth; Thus effectively ensure the accuracy of swollen type.
6) the edge welding reinforcement 4 of the heat exchange plate after swollen type, described reinforcement 4 is by coated for the edge of two metallic plates 3 of heat exchange plate; Thus increase its structural strength, ensure the stability in the heat exchange plate course of work.
7) heat exchange plate after coated reinforcement 4 is sent into sand-blasting machine, the two-sided of heat exchanging plate is polished; During sandblasting, gun slot air pressure remains on 0.6-0.8Mpa.
8), after heat exchange plate polishes smooth, carry out metallic plate 3 and hunt leak; By adapter 6 by high-pressure hose and air pressure list catenation, Pressure gauge is connected with air compressor machine air supply pipe, is inflated to 2.2Mp stops by air compressor machine to plate; Then after changing air manometer into water Pressure gauge, heat exchange plate is hung in tank, keep pressure 0.5 hour, detect and have ne-leakage.
9) last, the turbulent runner 7 of qualified heat exchange plate inside of hunting leak is cleaned.In cleaning process, adapter 6 is connected respectively with alcohol pump feed pipe and recovery tube respectively, with industrial alcohol, at least 1 hour is rinsed to turbulent runner 7.Thus guarantee that the inner welding slag of heat exchange plate rinses, prevent welding slag blocking pipe.
Finally it should be noted that, above embodiment is only in order to illustrate technical scheme of the present invention but not restriction technologies scheme, those of ordinary skill in the art is to be understood that, those are modified to technical scheme of the present invention or equivalent replacement, and do not depart from aim and the scope of the technical program, all should be encompassed in the middle of right of the present invention.
Claims (7)
1. have a falling film evaporation heat exchange plate processing technology for turbulent runner, it is characterized in that, this processing technology comprises the steps:
1) choose the metallic plate of thickness at 0.8mm-1.2mm, and cut out and smooth to designed size;
2) by after two metallic plate overlaps, to be put on workbench and with hold down gag, two metallic plates to be pressed and scraped, then utilizing laser focusing plumb joint to carry out stitch welding to two metallic plates according to heat exchanger plates turbulent flow channel shape and form heat exchange plate; Wherein, stitch welding position comprise two metallic plates edge, for the formation of the solder joint in several isolation bonding wires of snakelike turbulent runner and some distributions and turbulent runner;
3) heat exchanging plate carries out destressing process;
4) the swollen mouth frock of the heat exchange plate after destressing process is clamped, then carry out swollen mouth with swaging tool heat exchanging plate, and in the welding adapter of swollen mouth place; Wherein, described swollen mouth is two, and the position of two swollen mouths is corresponding with the position at turbulent runner two ends, and is connected with turbulent runner;
5) heat exchange plate after swollen mouth is put into swollen type on the swollen mould of plate, the degree of depth of the pit formed after making swollen type is 4-4.5mm, and detects swollen moldeed depth degree;
6) the edge welding reinforcement of the heat exchange plate after swollen type, described reinforcement is by coated for the edge of two metallic plates of heat exchange plate;
7) heat exchange plate after coated reinforcement is sent into sand-blasting machine, the two-sided of heat exchanging plate is polished;
8), after heat exchange plate polishes smooth, metallic plate leak detection is carried out;
9) last, the turbulent runner of qualified heat exchange plate inside of hunting leak is cleaned.
2. a kind of falling film evaporation heat exchange plate processing technology with turbulent runner according to claim 1, is characterized in that, step 2) in, the distance between the solder joint in described turbulent runner and the distance between solder joint and turbulent runner edge are 60-70mm.
3. a kind of falling film evaporation heat exchange plate processing technology with turbulent runner according to claim 1, is characterized in that, step 2) in, described hold down gag comprises nip rolls and binder beam, and described binder case bay is 200-300mm.
4. a kind of falling film evaporation heat exchange plate processing technology with turbulent runner according to claim 1, is characterized in that, in step 3), destressing process adopts spectrum harmonics stress eliminating device, utilizes vibratory stress reliefing.
5. a kind of falling film evaporation heat exchange plate processing technology with turbulent runner according to claim 1, it is characterized in that, in step 5), in swollen type process, adapter is connected with hydraulic press high-pressure hose, then to water filling in heat exchange plate, the runner in heat exchange plate is outwards expanded, after expansion molding, pressurize 10-20 minute.
6. a kind of falling film evaporation heat exchange plate processing technology with turbulent runner according to claim 1, it is characterized in that, in step 5), in swollen type process, centered by solder joint, detect the degree of depth of solder joint place pit, be no more than 4.3mm when pit depth reaches 4mm, stop pressurization, enter packing stage; After pressurize terminates, sampling Detection is carried out to pit depth.
7. a kind of falling film evaporation heat exchange plate processing technology with turbulent runner according to claim 1, it is characterized in that, in step 9), in cleaning process, adapter is connected respectively with alcohol pump feed pipe and recovery tube respectively, with industrial alcohol, few 1 hour is washed till to turbulent runner.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201510367660.8A CN104874987A (en) | 2015-06-29 | 2015-06-29 | Machining technology for falling film evaporation heat exchange plate with turbulent flow channel |
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| CN201510367660.8A CN104874987A (en) | 2015-06-29 | 2015-06-29 | Machining technology for falling film evaporation heat exchange plate with turbulent flow channel |
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Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN109262124A (en) * | 2018-09-30 | 2019-01-25 | 鲁西工业装备有限公司 | A kind of production method and application of dual phase steel powder flow cooler |
| CN111531336A (en) * | 2020-06-04 | 2020-08-14 | 浙江银轮机械股份有限公司 | Water-cooling plate production method |
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| EP1093868A1 (en) * | 1999-10-19 | 2001-04-25 | Joh. Vaillant GmbH u. Co. | Method of producing an evaporator/condenser |
| CA2492476A1 (en) * | 2002-07-17 | 2004-01-22 | Shell Canada Limited | Method of joining expandable tubulars |
| CN101691961A (en) * | 2009-09-30 | 2010-04-07 | 重庆大学 | Stainless steel plate type heat exchanger and processing molding method thereof |
| CN101927427A (en) * | 2010-02-09 | 2010-12-29 | 重庆远雄制冷成套设备有限公司 | Processing technique of heat exchanger sheet |
| CN102699648A (en) * | 2012-06-25 | 2012-10-03 | 常州市常蒸蒸发器有限公司 | Method for producing roll-bond evaporator |
| CN102729019A (en) * | 2012-06-25 | 2012-10-17 | 常州市常蒸蒸发器有限公司 | Method for producing roll-bond evaporator by using composite aluminum plate |
| CN102748979A (en) * | 2012-06-25 | 2012-10-24 | 上海吉益能源技术有限公司 | Plate-shaped heat exchange element as well as hydrophilous heat exchange device and manufacturing method of plate-shaped heat exchange element |
| CN104625668A (en) * | 2014-12-16 | 2015-05-20 | 苏州市瑞泰克机电有限公司 | Manufacturing method of blown-up evaporator |
-
2015
- 2015-06-29 CN CN201510367660.8A patent/CN104874987A/en active Pending
Patent Citations (8)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| EP1093868A1 (en) * | 1999-10-19 | 2001-04-25 | Joh. Vaillant GmbH u. Co. | Method of producing an evaporator/condenser |
| CA2492476A1 (en) * | 2002-07-17 | 2004-01-22 | Shell Canada Limited | Method of joining expandable tubulars |
| CN101691961A (en) * | 2009-09-30 | 2010-04-07 | 重庆大学 | Stainless steel plate type heat exchanger and processing molding method thereof |
| CN101927427A (en) * | 2010-02-09 | 2010-12-29 | 重庆远雄制冷成套设备有限公司 | Processing technique of heat exchanger sheet |
| CN102699648A (en) * | 2012-06-25 | 2012-10-03 | 常州市常蒸蒸发器有限公司 | Method for producing roll-bond evaporator |
| CN102729019A (en) * | 2012-06-25 | 2012-10-17 | 常州市常蒸蒸发器有限公司 | Method for producing roll-bond evaporator by using composite aluminum plate |
| CN102748979A (en) * | 2012-06-25 | 2012-10-24 | 上海吉益能源技术有限公司 | Plate-shaped heat exchange element as well as hydrophilous heat exchange device and manufacturing method of plate-shaped heat exchange element |
| CN104625668A (en) * | 2014-12-16 | 2015-05-20 | 苏州市瑞泰克机电有限公司 | Manufacturing method of blown-up evaporator |
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN109262124A (en) * | 2018-09-30 | 2019-01-25 | 鲁西工业装备有限公司 | A kind of production method and application of dual phase steel powder flow cooler |
| CN111531336A (en) * | 2020-06-04 | 2020-08-14 | 浙江银轮机械股份有限公司 | Water-cooling plate production method |
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Application publication date: 20150902 |
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