CN101693814A - Adhesion method for repairing plate-fin heat exchanger and adhesive formula - Google Patents
Adhesion method for repairing plate-fin heat exchanger and adhesive formula Download PDFInfo
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- CN101693814A CN101693814A CN200910154033A CN200910154033A CN101693814A CN 101693814 A CN101693814 A CN 101693814A CN 200910154033 A CN200910154033 A CN 200910154033A CN 200910154033 A CN200910154033 A CN 200910154033A CN 101693814 A CN101693814 A CN 101693814A
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- heat exchanger
- fin heat
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- adhesive
- plate
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Abstract
The invention relates to the field of heat exchanger maintenance, in particular to an adhesion method for repairing a plate-fin heat exchanger and an adhesive formula. The adhesion method used for repairing the plate-fin heat exchanger includes the following steps: 1) cleaning the leaking part of a heat exchanger; and 2) spreading an adhesive to a gap between a partition board and a seal. Besides, the invention also provides a formula of the adhesive used for repairing the plate-fin heat exchanger. When the method is used for repairing the heat exchanger, fins are not influenced, and core leakage can be reduced. The method is matched with high-temperature fire for baking adhered parts, thereby enhancing the adhesion strength. The adhesive provided by the invention has better mechanical strength, the tensile strength thereof can reach 21 MPa, and the shearing strength reaches 1 MPa; the range of usage temperature is wide, the mechanical performance of the adhesive is stable in high-temperature or low-temperature environment, and the variable temperature range of the heat exchanger can be used; and the adhesive has certain fatigue resistance performance and can bear the work under the state of alternating pressure.
Description
Technical field
The present invention relates to the interchanger area of maintenance, refer in particular to a kind of adhering method of repairing plate-fin heat exchanger and prescription of caking agent of being used for.
Background technology
The structural unite body of plate-fin heat exchanger all is made up of fin, dividing plate, strip of paper used for sealing and inducer, respectively put one deck dividing plate up and down at fin, dividing plate is the matrix material that the two sides covers solder, under brazing temperature, solder fusing and make fin, dividing plate, strip of paper used for sealing integrally welded, so basic singly play stacked and arrange the back soldering to become integral body be exactly the plate-fin heat exchanger fuse of using always by a plurality of, but vacuum brazing is subjected to weather, vacuum tightness, the size impact of starting material and workpiece itself, the technology of soldering is difficult to grasp, and a lot of core bodys leak.After core body leaked, traditional method was argon arc welding repair welding by hand, because fin material is extremely thin, fin is easy to be burnt out during repair welding, stipulate on the also with good grounds TB/7261-97 standard that plate-fin heat exchanger repair welding length must not surpass 60mm, scrap so nearly 1% core body leaks to cause.
Summary of the invention
In order to overcome the above problems, the invention provides a kind ofly can not influence fin, reduces the method for repairing and mending that core body leaks.
A kind of adhering method that is used for repairing plate-fin heat exchanger comprises the steps: 1) leakage place of cleaning interchanger; 2) caking agent is applied to space between dividing plate and strip of paper used for sealing.
Wherein, the scale removal process of described step 1) is: handle the row polishing with wire brush to leaking earlier, until exposing metalluster; Remove oxide film with dilute NaOH solution again; At last with flushing with clean water and dry up.
Further, described step 2) coating adhesive toasts the abutting edge with thermal-flame simultaneously.
The present invention also provides a kind of prescription that is used for the caking agent of repairing plate-fin heat exchanger in addition.Each mass percent of forming of caking agent is:
E-44 Resins, epoxy 40%-60%
Polyvinyl butyral acetal 5%-15%
Triethylamine 5%-15%
Aluminium sesquioxide 20%-30%
Acetone 2%-5%.
When repairing interchanger, do not influence fin among the present invention, reduce core body and leak.The present invention is used thermal-flame the abutting edge is toasted, and improves bonding strength.Caking agent provided by the invention has physical strength preferably, its tensile strength can reach 21MPa, it is wide that shearing resistance reaches 10Mpa use temperature scope, and caking agent mechanicalness under high temperature or low temperature environment is stable, the temperature range (200~150 ℃) that can use interchanger to change; This caking agent has certain fatigue resistance performance, can bear the work under the alternating pressure state.
Embodiment
The present invention will be further described below in conjunction with embodiment, and compound used therefor is market and buys.
Embodiment 1
With E-44 Resins, epoxy 100g, polyvinyl butyral acetal 20g, triethylamine 20g, aluminium sesquioxide 50g, an amount of uniform mixing of acetone.Solidify at pressure 0.3MPa, 30 ℃ of following 72h, make caking agent.
The concrete bonding step of repairing plate-fin heat exchanger is as follows:
1. handle the row polishing with wire brush to leaking, until exposing metalluster;
2. remove oxide film with dilute NaOH solution;
3. use flushing with clean water, dry up;
4. carry out bondingly with the caking agent for preparing, caking agent is applied to space between dividing plate and strip of paper used for sealing,, be used thermal-flame the abutting edge is toasted in order to improve bonding strength.
Embodiment 2
With E-44 Resins, epoxy 400g, polyvinyl butyral acetal 50g, triethylamine 50g, aluminium sesquioxide 200g, acetone 20g uniform mixing.Solidify at pressure 0.3MPa, 30 ℃ of following 76h, make caking agent.
The concrete adhering method of repairing plate-fin heat exchanger is as described in the embodiment 1.
Embodiment 3
With E-44 Resins, epoxy 60g, polyvinyl butyral acetal 15g, triethylamine 15g, aluminium sesquioxide 30g, acetone 5g uniform mixing.Solidify at pressure 0.3MPa, 30 ℃ of following 70h, make caking agent.
The concrete adhering method of repairing plate-fin heat exchanger is as described in the embodiment 1.
Claims (4)
1. an adhering method that is used for repairing plate-fin heat exchanger is characterized in that: comprise the steps: 1) leakage place of cleaning interchanger; 2) caking agent is applied to space between dividing plate and strip of paper used for sealing.
2. the adhering method that is used for repairing plate-fin heat exchanger according to claim 1 is characterized in that: the scale removal process of described step 1) is: handle the row polishing with wire brush to leaking earlier, until exposing metalluster; Remove oxide film with dilute NaOH solution again; At last with flushing with clean water and dry up.
3. the adhering method that is used for repairing plate-fin heat exchanger according to claim 1 is characterized in that: described step 2) coating adhesive toasts the abutting edge with thermal-flame simultaneously.
4. the prescription of the used caking agent of the described adhering method of claim 1 is characterized in that: each mass percent of forming of caking agent is:
E-44 Resins, epoxy 40%-60%
Polyvinyl butyral acetal 5%-15%
Triethylamine 5%-15%
Aluminium sesquioxide 20%-30%
Acetone 2%-5%.
Priority Applications (1)
Application Number | Priority Date | Filing Date | Title |
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CN200910154033A CN101693814A (en) | 2009-10-22 | 2009-10-22 | Adhesion method for repairing plate-fin heat exchanger and adhesive formula |
Applications Claiming Priority (1)
Application Number | Priority Date | Filing Date | Title |
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CN200910154033A CN101693814A (en) | 2009-10-22 | 2009-10-22 | Adhesion method for repairing plate-fin heat exchanger and adhesive formula |
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CN101693814A true CN101693814A (en) | 2010-04-14 |
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CN200910154033A Pending CN101693814A (en) | 2009-10-22 | 2009-10-22 | Adhesion method for repairing plate-fin heat exchanger and adhesive formula |
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Cited By (7)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
CN103450828A (en) * | 2013-09-23 | 2013-12-18 | 江苏华夏制漆科技有限公司 | Glue for coating brush and preparation method of glue |
CN103911106A (en) * | 2013-11-18 | 2014-07-09 | 吴江市凯盈贸易有限公司 | Polyvinyl butyral adhesive |
CN105400469A (en) * | 2015-11-24 | 2016-03-16 | 沈阳黎明航空发动机(集团)有限责任公司 | Method for size renovation of aerospace parts |
CN106281166A (en) * | 2016-08-29 | 2017-01-04 | 强新正品(苏州)环保材料科技有限公司 | A kind of epoxyn |
CN107744927A (en) * | 2017-11-09 | 2018-03-02 | 山东翔宇航空技术服务有限责任公司 | A kind of airplane heat exchanger coating technique |
CN112439648A (en) * | 2019-08-28 | 2021-03-05 | 北京金风科创风电设备有限公司 | Method for repairing plate-fin radiator |
CN114799724A (en) * | 2022-05-18 | 2022-07-29 | 天津电力机车有限公司 | Method for repairing leakage fault of plate-fin radiator based on composite bonding |
-
2009
- 2009-10-22 CN CN200910154033A patent/CN101693814A/en active Pending
Cited By (9)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
CN103450828A (en) * | 2013-09-23 | 2013-12-18 | 江苏华夏制漆科技有限公司 | Glue for coating brush and preparation method of glue |
CN103450828B (en) * | 2013-09-23 | 2015-08-19 | 江苏华夏制漆科技有限公司 | A kind of coating hairbrush glue and preparation method thereof |
CN103911106A (en) * | 2013-11-18 | 2014-07-09 | 吴江市凯盈贸易有限公司 | Polyvinyl butyral adhesive |
CN105400469A (en) * | 2015-11-24 | 2016-03-16 | 沈阳黎明航空发动机(集团)有限责任公司 | Method for size renovation of aerospace parts |
CN106281166A (en) * | 2016-08-29 | 2017-01-04 | 强新正品(苏州)环保材料科技有限公司 | A kind of epoxyn |
CN107744927A (en) * | 2017-11-09 | 2018-03-02 | 山东翔宇航空技术服务有限责任公司 | A kind of airplane heat exchanger coating technique |
CN112439648A (en) * | 2019-08-28 | 2021-03-05 | 北京金风科创风电设备有限公司 | Method for repairing plate-fin radiator |
CN114799724A (en) * | 2022-05-18 | 2022-07-29 | 天津电力机车有限公司 | Method for repairing leakage fault of plate-fin radiator based on composite bonding |
CN114799724B (en) * | 2022-05-18 | 2023-07-28 | 天津电力机车有限公司 | Composite adhesion-based plate-fin radiator leakage fault repairing method |
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Open date: 20100414 |