CN112139368B - Flanging process for effectively retarding corrosion of lining of plate heat exchanger - Google Patents
Flanging process for effectively retarding corrosion of lining of plate heat exchanger Download PDFInfo
- Publication number
- CN112139368B CN112139368B CN202010938988.1A CN202010938988A CN112139368B CN 112139368 B CN112139368 B CN 112139368B CN 202010938988 A CN202010938988 A CN 202010938988A CN 112139368 B CN112139368 B CN 112139368B
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- Prior art keywords
- heat exchanger
- flanging
- lining
- mounting block
- die
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- B—PERFORMING OPERATIONS; TRANSPORTING
- B21—MECHANICAL METAL-WORKING WITHOUT ESSENTIALLY REMOVING MATERIAL; PUNCHING METAL
- B21D—WORKING OR PROCESSING OF SHEET METAL OR METAL TUBES, RODS OR PROFILES WITHOUT ESSENTIALLY REMOVING MATERIAL; PUNCHING METAL
- B21D39/00—Application of procedures in order to connect objects or parts, e.g. coating with sheet metal otherwise than by plating; Tube expanders
- B21D39/06—Application of procedures in order to connect objects or parts, e.g. coating with sheet metal otherwise than by plating; Tube expanders of tubes in openings, e.g. rolling-in
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B21—MECHANICAL METAL-WORKING WITHOUT ESSENTIALLY REMOVING MATERIAL; PUNCHING METAL
- B21D—WORKING OR PROCESSING OF SHEET METAL OR METAL TUBES, RODS OR PROFILES WITHOUT ESSENTIALLY REMOVING MATERIAL; PUNCHING METAL
- B21D19/00—Flanging or other edge treatment, e.g. of tubes
- B21D19/08—Flanging or other edge treatment, e.g. of tubes by single or successive action of pressing tools, e.g. vice jaws
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- B—PERFORMING OPERATIONS; TRANSPORTING
- B21—MECHANICAL METAL-WORKING WITHOUT ESSENTIALLY REMOVING MATERIAL; PUNCHING METAL
- B21D—WORKING OR PROCESSING OF SHEET METAL OR METAL TUBES, RODS OR PROFILES WITHOUT ESSENTIALLY REMOVING MATERIAL; PUNCHING METAL
- B21D53/00—Making other particular articles
- B21D53/02—Making other particular articles heat exchangers or parts thereof, e.g. radiators, condensers fins, headers
- B21D53/04—Making other particular articles heat exchangers or parts thereof, e.g. radiators, condensers fins, headers of sheet metal
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- Engineering & Computer Science (AREA)
- Mechanical Engineering (AREA)
- Heat-Exchange Devices With Radiators And Conduit Assemblies (AREA)
Abstract
The application relates to a flanging process for effectively retarding corrosion of a bush of a plate heat exchanger, which comprises the following steps: s01, pre-installing the bushing, inserting the bushing on the heat exchanger, enabling one end of the bushing to be tightly abutted against the heat exchanger, and enabling the other end of the bushing to extend out of the heat exchanger; s02, pre-flanging the lining, mounting a flanging die at the pipe orifice of the lining, and pulling the flanging die through a tension device to expand the pipe orifice of the lining to be horn-shaped; s03, the bushing is shaped, the flanging dies with larger diameters are sequentially replaced, and the flanging dies are continuously pulled through the tension device until the pipe orifice of the bushing is flattened and tightly attached to the heat exchanger. The application has the advantage of excellent sealing property and reduced corrosion of the plate.
Description
Technical Field
The application relates to the technical field of heat exchangers, in particular to a flanging process for effectively retarding corrosion of a lining of a plate heat exchanger.
Background
The plate heat exchanger mainly comprises a plate, a sealing gasket, a fixed pressure plate, a movable pressure plate, an upper guide rod, a lower guide rod, a clamping bolt, a bracket and other parts. The working medium flows through the narrow and zigzag channels formed by two adjacent plates and transfers heat through the separated plates.
A connecting structure between a plate heat exchanger and a bushing in the related art is shown in fig. 1, and includes a heat exchanger main body, four flow passage holes are formed in the heat exchanger main body, a bushing 1 for fluid to flow into is arranged in each flow passage hole, the bushing 1 includes butt joint pipes 11 which are butt-jointed and inserted in the flow passage holes, and end rings 111 attached to the heat exchanger main body are arranged at ends of the butt joint pipes 11 which are far away from each other; and a rubber ring is arranged between the two butt joint pipes 11, and when the butt joint pipes 11 are processed, the rubber ring is plugged into the runner hole, and then the butt joint pipes 11 are installed in the runner hole.
In view of the above-mentioned related art, the inventor believes that when an external fluid enters the liner 1, the fluid easily flows into the heat exchanger main body from the gap between the butt pipes 11, and there is a defect that corrosion of the plate is easily caused.
Disclosure of Invention
In order to reduce the corrosion of the plate, the flanging process for the corrosion lining of the plate heat exchanger is effectively slowed down.
The flanging process for the corrosion-retarding bush of the plate heat exchanger (which is the same as the subject name of claim 1) provided by the application adopts the following technical scheme:
s01, pre-installing the bushing, inserting the bushing on the heat exchanger, enabling one end of the bushing to be tightly abutted against the heat exchanger, and enabling the other end of the bushing to extend out of the heat exchanger;
s02, pre-flanging the lining, mounting a flanging die at the pipe orifice of the lining, and pulling the flanging die through a tension device to expand the pipe orifice of the lining to be horn-shaped;
s03, sizing the bush, sequentially replacing the flanging dies with larger diameters, and continuously pulling the flanging dies through the tension device until the pipe orifice of the bush is flattened and tightly attached to the heat exchanger.
Through adopting above-mentioned technical scheme, bush integrated into one piece makes and installs on heat exchanger, and the leakproofness between bush and the heat exchanger is better, the infiltration of the rivers that have significantly reduced to reduce the corruption of slab, be favorable to improving the working life of slab.
Preferably, the following steps are added in the step S03: and S031, performing waterproof treatment at the joint of the lining and the heat exchanger.
Through adopting above-mentioned technical scheme, do water repellent between bush and heat exchanger, further improve the leakproofness between bush and the heat exchanger, further reduce the infiltration of rivers.
Preferably, the bushing comprises a long pipe, an edge pressing ring and a mounting ring, and the edge pressing ring and the mounting ring are respectively connected to two ends of the long pipe in the length direction in an integrated manner so as to clamp the long pipe on the heat exchanger.
Through adopting above-mentioned technical scheme, the fashioned bush water-proof effects of integration is good, the infiltration of the rivers that have significantly reduced to reduce the corruption of slab, be favorable to improving the life of slab.
Preferably, the inner side wall of the long pipe is provided with an anticorrosive coating.
Through adopting above-mentioned technical scheme, the setting of anticorrosive coating plays anticorrosive effect to the long tube.
Preferably, the tension device comprises a screw, a die mounting block and a hydraulic cylinder, the die mounting block is connected with the flanging die, the screw is in threaded connection with the die mounting block, and the liquid oxygen cylinder is connected with the screw to pull the screw to move; the hydraulic cylinder is connected with the blank holder.
Through adopting above-mentioned technical scheme, the pulling force device has screw rod, mould installation piece and pneumatic cylinder to constitute, and mould installation piece is used for the installation of turn-ups mould, through pneumatic cylinder drive mould installation piece removal, and mould installation piece drives the turn-ups mould and removes to install the bushing, mounting structure is simple effective, easy operation, and work is high-efficient.
Preferably, the die mounting block comprises a mounting block and an abutting block, and the mounting block is movably sleeved on the flanging die; one end of the mounting block in the length direction is connected with the abutting block, and the other end of the mounting block is connected with the screw; the abutting block is attached to the outer side wall of the flanging die.
By adopting the technical scheme, when the flanging die is installed, the installation block is inserted into the hole reserved on the flanging die, so that the abutting block is attached to the flanging die, and then the installation block is connected with the screw rod; simple structure, convenient operation is convenient for install the turn-ups mould.
Preferably, the lateral wall of liquid oxygen jar is provided with flange, flange and blank pressing ring laminating mutually, flange passes through the bolt and can dismantle the fixing on blank pressing ring.
Through adopting above-mentioned technical scheme, thereby realize the quick fixation between pneumatic cylinder and the blank holder ring through the fixed between flange and the blank holder ring, the staff's of being convenient for operation.
Preferably, the screw rod is far away from one end of the installation block and is connected to a piston rod of the hydraulic cylinder, a connecting pipe is connected between the screw rod and the piston rod of the hydraulic cylinder, and the connecting pipe is fixedly connected to the piston rod of the hydraulic cylinder and detachably connected to the screw rod.
By adopting the technical scheme, the quick connection between the screw rod and the piston rod of the hydraulic cylinder is realized through the connecting pipe, so that the operation of workers is greatly facilitated.
Preferably, the outer side wall of the connecting pipe is uniformly provided with a plurality of bulges.
Through adopting above-mentioned technical scheme, bellied being provided with does benefit to and operates the rotation to the connecting pipe, makes things convenient for staff's operation greatly.
To sum up, the beneficial technical effect of this application does:
1. the bushing is integrally formed and installed on the heat exchanger, the sealing performance between the bushing and the heat exchanger is good, and the penetration of water flow is greatly reduced, so that the corrosion of the plate is reduced, and the service life of the plate is prolonged;
2. the tension device is composed of a screw rod, a die mounting block and a hydraulic cylinder, the die mounting block is used for mounting the flanging die, the hydraulic cylinder drives the die mounting block to move, and the die mounting block drives the flanging die to move, so that the bushing is mounted, the mounting structure is simple and effective, the operation is simple, and the work is efficient.
Drawings
Fig. 1 is a schematic view of a structure of a bushing in the related art. A (c)
FIG. 2 is a flow chart of an exemplary embodiment of a process for reducing burring of a corrosion liner of a plate heat exchanger.
Fig. 3 is a schematic structural diagram for embodying the bush in the embodiment of the present application.
Fig. 4 is a schematic structural diagram of a mounting ring for embodying a machining process in an embodiment of the present application.
Fig. 5 is an enlarged view of a portion a in fig. 4.
Description of reference numerals: 1. a bushing; 11. butt-joint pipes; 111. an end ring; 12. a long tube; 121. an anticorrosive layer; 13. pressing an edge ring; 14. a mounting ring; 2. a tension device; 21. a screw; 22. a mold mounting block; 221. mounting blocks; 222. a butting block; 23. a hydraulic cylinder; 231. a connecting flange; 3. a connecting pipe; 31. and (4) protruding.
Detailed Description
The present application is described in further detail below with reference to figures 2-5.
The embodiment of the application discloses a flanging process for effectively retarding corrosion of a bushing of a plate heat exchanger. Referring to fig. 2 and 3, the process includes the steps of:
s01, pre-installing the bushing 1, inserting the bushing 1 on the heat exchanger, enabling one end of the bushing 1 to be tightly abutted against the heat exchanger, and enabling the other end of the bushing 1 to extend out of the heat exchanger;
s02, pre-flanging the lining 1, mounting a flanging die at the pipe orifice of the lining 1, and pulling the flanging die through a tension device 2 to expand the pipe orifice of the lining 1 into a horn shape;
s03, shaping the bush 1, sequentially replacing flanging dies with larger diameters, and continuously pulling the flanging dies through the tension device 2 until the pipe orifice of the bush 1 is flattened and tightly attached to the heat exchanger; and (3) coating waterproof glue at the joint of the bushing 1 and the heat exchanger for waterproof treatment.
Referring to fig. 2, the bushing 1 includes a long tube 12, a blank holder 13 and a mounting ring 14, the blank holder 13 and the mounting ring 14 are integrally connected to two ends of the long tube 12 in the length direction, the long tube 12 is sleeved in a hole reserved on the heat exchanger, and the blank holder 13 and the mounting ring 14 are respectively abutted against two sides of the heat exchanger in the thickness direction; the mounting ring 14 is the tubular body of integrated into one piece connection on long tube 12 before the installation, when the installation bush 1, inserts bush 1 and establishes in the hole for blank pressing ring 13 pastes tightly on heat exchanger, then pulls the turn-ups mould through tension device 2, and then carries out the turn-ups to the mouth of pipe of long tube 12, makes the mouth of pipe process to loudspeaker form by the tubulose, until flattening and paste tightly on heat exchanger, and then forms mounting ring 14.
Referring to fig. 3, the inner side wall of the long tube 12 is provided with an anti-corrosion layer 121, and the anti-corrosion layer 121 is formed by electroplating, so that a good anti-corrosion effect is achieved, and corrosion of the long tube 12 is reduced.
Referring to fig. 4, the tension device 2 includes a screw 21, a die mounting block 22 and a hydraulic cylinder 23, wherein the die mounting block 22 includes a mounting block 221 and an abutting block 222, the mounting block 221 is movably sleeved in a hole reserved on the flanging die, the abutting block 222 is welded at one end of the mounting block 221 in the length direction and is attached to the flanging die, and one end of the mounting block 221 away from the abutting block 222 is in threaded connection with the screw 21; one end of the screw 21, which is far away from the mounting block 221, is connected with a piston rod of the hydraulic cylinder 23, a connecting pipe 3 is arranged between the piston rod of the hydraulic cylinder 23 and the screw 21, the connecting pipe 3 is sleeved and welded on the outer side wall of the piston rod, and the screw thread is sleeved on the screw 21, so that the connection between the screw 21 and the hydraulic cylinder 23 is realized; the welding of the lateral wall of pneumatic cylinder 23 has flange 231, and flange 231 can dismantle through the bolt and fix on blank pressing ring 13, and when installation bush 1, through pneumatic cylinder 23 pulling connecting pipe 3, connecting pipe 3 drives screw rod 21 and removes, and screw rod 21 drives long tube 12 and butt piece 222 and removes, and then drives the turn-ups mould and remove.
Referring to fig. 4 and 5, the outer side wall of the connecting pipe 3 is integrally formed with a plurality of hemispherical protrusions 31, and the protrusions 31 are arranged to facilitate the operation and rotation of the connecting pipe 3, so that the operation of workers is greatly facilitated.
The implementation principle of the flanging process for effectively retarding the corrosion of the bush of the plate heat exchanger is as follows: when installing bush 1, insert long tube 12 in establishing the hole on heat exchanger, make blank pressing ring 13 paste tightly on heat exchanger, install pneumatic cylinder 23 on blank pressing ring 13, through pneumatic cylinder 23 pulling connecting pipe 3, connecting pipe 3 drives screw rod 21 and removes, screw rod 21 drives long tube 12 and butt piece 222 and removes, and then drive the turn-ups mould and remove, and then carry out the turn-ups to the mouth of pipe of installation piece 221, make the mouth of pipe by tubulose to loudspeaker form, and change the turn-ups mould that the diameter is bigger in proper order, until flattening and paste tightly on heat exchanger, and then form collar 14.
The embodiments of the present invention are all preferred embodiments of the present application, and the protection scope of the present application is not limited thereby, so: equivalent changes in structure, shape and principle of the present application shall be covered by the protection scope of the present application.
Claims (4)
1. A flanging process for effectively retarding corrosion of a lining of a plate heat exchanger is characterized by comprising the following steps:
s01, pre-installing a lining (1), wherein the lining (1) comprises a long pipe (12) and an edge pressing ring (13), and the edge pressing ring (13) is integrally connected to one end of the long pipe; when the heat exchanger is installed, one end of the long pipe (12) far away from the edge pressing ring (13) is inserted into a hole on the heat exchanger, so that the edge pressing ring (13) is tightly attached to the heat exchanger; meanwhile, one end of the long pipe (12) far away from the edge pressing ring (13) extends out of the cavity on the heat exchanger;
s02, pre-flanging a lining (1), installing a flanging die at a pipe orifice at one end, far away from a blank holder ring (13), of a long pipe (12), and then pulling the flanging die through a pulling device (2) to expand the pipe orifice of the long pipe (12) into a horn shape;
s03, shaping the bushing (1), sequentially replacing flanging dies with larger diameters, continuously pulling the flanging dies through the tension device (2) until the pipe orifice of the long pipe (12) is flattened to form a mounting ring (14), wherein the mounting ring (14) is attached to the heat exchanger;
the tension device (2) comprises a screw rod (21), a die mounting block (22) and a hydraulic cylinder (23), the die mounting block (22) is connected with the flanging die, the screw rod (21) is in threaded connection with the die mounting block (22), and the hydraulic cylinder (23) is connected with the screw rod (21) and used for pulling the screw rod (21) to move; the hydraulic cylinder (23) is connected with the blank holder (13);
the die mounting block (22) comprises a mounting block (221) and an abutting block (222), and the mounting block (221) is movably sleeved on the flanging die; one end of the mounting block (221) in the length direction is connected with the abutting block (222), and the other end of the mounting block is connected with the screw rod (21); the abutting block (222) is attached to the outer side wall of the flanging die;
one end of the screw rod (21) far away from the direction of the mounting block (221) is connected with a piston rod of the hydraulic cylinder (23); a connecting pipe (3) is connected between the screw rod (21) and a piston rod of the hydraulic cylinder (23), the connecting pipe (3) is fixedly connected to the piston rod of the hydraulic cylinder (23), and the connecting pipe is detachably connected to the screw rod (21);
the lateral wall of pneumatic cylinder (23) is provided with flange (231), flange (231) and blank holder (13) are laminated mutually, flange (231) can be dismantled through the bolt and fix on blank holder (13).
2. The flanging process for effectively reducing the corrosion of the bush of the plate heat exchanger according to claim 1, wherein the following steps are added in the step S03:
s031, waterproof treatment is carried out at the mutual connection position of the lining (1) and the heat exchanger.
3. The flanging process for the bushing, which is effective in reducing corrosion of the plate heat exchanger, of claim 1, wherein: the inside wall of long pipe (12) is provided with anticorrosive coating (121).
4. The flanging process for effectively reducing corrosion of the bush of the plate heat exchanger according to claim 1, wherein: the outer side wall of the connecting pipe (3) is uniformly provided with a plurality of bulges (31).
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202010938988.1A CN112139368B (en) | 2020-09-09 | 2020-09-09 | Flanging process for effectively retarding corrosion of lining of plate heat exchanger |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202010938988.1A CN112139368B (en) | 2020-09-09 | 2020-09-09 | Flanging process for effectively retarding corrosion of lining of plate heat exchanger |
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| Publication Number | Publication Date |
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| CN112139368A CN112139368A (en) | 2020-12-29 |
| CN112139368B true CN112139368B (en) | 2022-10-21 |
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| Application Number | Title | Priority Date | Filing Date |
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| CN202010938988.1A Active CN112139368B (en) | 2020-09-09 | 2020-09-09 | Flanging process for effectively retarding corrosion of lining of plate heat exchanger |
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Families Citing this family (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN114273548B (en) * | 2021-12-28 | 2023-09-08 | 安庆汇通汽车部件股份有限公司 | Stabilizer bar flanging device |
Citations (7)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPS56122625A (en) * | 1980-02-29 | 1981-09-26 | Hitachi Zosen Corp | Production of fin or the like of pipe for heat exchanger |
| JP2008246725A (en) * | 2007-03-29 | 2008-10-16 | Mitsubishi Plastics Ind Ltd | Method for producing in-core for joint |
| CN104646468A (en) * | 2013-12-04 | 2015-05-27 | 中船桂江造船有限公司 | Flanging machine |
| CN205631364U (en) * | 2016-05-27 | 2016-10-12 | 江苏新澎复合材料有限公司 | Compound pipe flanging device of plastic steel |
| CN206140888U (en) * | 2016-09-19 | 2017-05-03 | 大庆高新区法尔文得新材料有限公司 | Ultrahigh molecular weight polyethylene manages flanger |
| CN106903868A (en) * | 2017-05-03 | 2017-06-30 | 浙江金洲管道科技股份有限公司 | A kind of ring flange internal lining pipe hemmer |
| CN107952896A (en) * | 2017-11-14 | 2018-04-24 | 西安交通大学 | A kind of method of multi-pass flaring shaping plate heat exchanger grommet |
Family Cites Families (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US5433100A (en) * | 1993-11-12 | 1995-07-18 | Fatigue Technology, Inc. | Apparatus for split sleeve and tubular bushing cold expansion |
| JP3632159B2 (en) * | 1996-07-17 | 2005-03-23 | 隆徳 山南 | Tube expansion device |
| US7375277B1 (en) * | 2000-06-26 | 2008-05-20 | Fatigue Technology, Inc. | Double flanged bushings and installation methods |
| JP2010110780A (en) * | 2008-11-05 | 2010-05-20 | Marugo Rubber Ind Co Ltd | Drawing device for bush |
| EP2562875A1 (en) * | 2011-08-23 | 2013-02-27 | CEMBRE S.p.A. | Pulling device for pulling a punch in a contact bush |
-
2020
- 2020-09-09 CN CN202010938988.1A patent/CN112139368B/en active Active
Patent Citations (7)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPS56122625A (en) * | 1980-02-29 | 1981-09-26 | Hitachi Zosen Corp | Production of fin or the like of pipe for heat exchanger |
| JP2008246725A (en) * | 2007-03-29 | 2008-10-16 | Mitsubishi Plastics Ind Ltd | Method for producing in-core for joint |
| CN104646468A (en) * | 2013-12-04 | 2015-05-27 | 中船桂江造船有限公司 | Flanging machine |
| CN205631364U (en) * | 2016-05-27 | 2016-10-12 | 江苏新澎复合材料有限公司 | Compound pipe flanging device of plastic steel |
| CN206140888U (en) * | 2016-09-19 | 2017-05-03 | 大庆高新区法尔文得新材料有限公司 | Ultrahigh molecular weight polyethylene manages flanger |
| CN106903868A (en) * | 2017-05-03 | 2017-06-30 | 浙江金洲管道科技股份有限公司 | A kind of ring flange internal lining pipe hemmer |
| CN107952896A (en) * | 2017-11-14 | 2018-04-24 | 西安交通大学 | A kind of method of multi-pass flaring shaping plate heat exchanger grommet |
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| CN112139368A (en) | 2020-12-29 |
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