CN113972796A - Method for dredging cooling pipeline of generator - Google Patents
Method for dredging cooling pipeline of generator Download PDFInfo
- Publication number
- CN113972796A CN113972796A CN202111330260.1A CN202111330260A CN113972796A CN 113972796 A CN113972796 A CN 113972796A CN 202111330260 A CN202111330260 A CN 202111330260A CN 113972796 A CN113972796 A CN 113972796A
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- CN
- China
- Prior art keywords
- spring
- impregnating varnish
- plug
- copper pipe
- generator
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- Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
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- H—ELECTRICITY
- H02—GENERATION; CONVERSION OR DISTRIBUTION OF ELECTRIC POWER
- H02K—DYNAMO-ELECTRIC MACHINES
- H02K15/00—Methods or apparatus specially adapted for manufacturing, assembling, maintaining or repairing of dynamo-electric machines
-
- H—ELECTRICITY
- H02—GENERATION; CONVERSION OR DISTRIBUTION OF ELECTRIC POWER
- H02K—DYNAMO-ELECTRIC MACHINES
- H02K1/00—Details of the magnetic circuit
- H02K1/06—Details of the magnetic circuit characterised by the shape, form or construction
- H02K1/12—Stationary parts of the magnetic circuit
- H02K1/20—Stationary parts of the magnetic circuit with channels or ducts for flow of cooling medium
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- Engineering & Computer Science (AREA)
- Power Engineering (AREA)
- Manufacturing & Machinery (AREA)
- Manufacture Of Motors, Generators (AREA)
- Motor Or Generator Cooling System (AREA)
Abstract
The invention discloses a method for dredging a cooling pipeline of a generator, which comprises the steps of heating and softening a plug impregnating varnish, extending a spring into a cooling copper pipe and jacking the spring to the position of the plug impregnating varnish, slowly rotating the spring to advance, crushing the plug impregnating varnish by the spring to enable the plug impregnating varnish to fall off, taking out the spring, introducing high-pressure air into the cooling copper pipe of a corresponding branch, blowing out a plug impregnating varnish block and residues, and repeating the process until the plug impregnating varnish on all branches is completely cleaned. The invention has no damage to each part of the generator and is not limited by the finished production process of the generator and the place where the generator is located.
Description
Technical Field
The invention relates to the technical field of generators, in particular to a method for dredging a cooling pipeline of a generator.
Background
The stator core of a certain model generator is embedded with a cooling copper pipe, and after the stator coil is embedded in the stator core with the copper pipe, the stator core enters a dip coating process, so that dip coating is leaked to enter the cooling copper pipe due to poor protection of the pipe orifice of the copper pipe, and the dip coating is solidified to cause the blockage of the cooling copper pipe after baking.
The impregnating varnish for the generator belongs to a thermosetting material, is heated and baked to about 170 ℃, generates chemical reaction and cross-linking curing to harden, and the change is irreversible, has very stable performance and hard texture, and is not melted even at high temperature and not dissolved in any organic solvent. The impregnating varnish bonds at the copper pipe inner wall, and the clearance degree of difficulty is very big, and the method of taking at present is to cut off copper pipe tip, extracts the copper pipe, changes copper pipe or even stator coil from stator core tip and just can solve this problem.
Disclosure of Invention
The invention aims to reduce the rework amount and material scrap loss caused by dredging the cooling copper pipe, and provides a method for dredging a generator cooling pipeline, which is simple and reliable to operate.
In order to achieve the purpose, the technical scheme provided by the invention is as follows: a method for dredging a cooling pipeline of a generator is characterized in that a cooling copper pipe is embedded in a stator core of the generator and welded to form a plurality of branches, pipe orifices are formed at two ends of each branch, and a plug impregnating varnish is located in the cooling copper pipe; the method comprises the following steps: firstly, heating the impregnated paint of the plug to soften the impregnated paint, then extending the spring into the cooling copper pipe to push the spring to the impregnated paint of the plug, then slowly rotating the spring to advance, stirring the impregnated paint of the plug by the spring to make the impregnated paint of the plug fall off, then taking out the spring, introducing high-pressure air into the cooling copper pipe of the corresponding branch, blowing out the impregnated paint blocks and residues of the plug, and repeating the process until the impregnated paint of the plug on all the branches is completely cleaned up.
The method for dredging the cooling pipeline of the generator specifically comprises the following steps:
the method comprises the following steps: a gun mouth of a hot air gun is aligned to a pipe mouth of the cooling copper pipe, and the impregnating varnish for the blockage is heated to soften the impregnating varnish for the blockage and reduce the adhesive force of the impregnating varnish for the blockage;
step two: cutting the spring by using a grinding wheel cutting machine according to the blocking position, clamping one end of the spring by using a chuck of an electric hand drill, extending the other end of the spring into the cooling copper pipe, enabling the spring to be pushed to the position of the impregnating varnish of the blocking object, and pressing a switch of the electric hand drill to enable the electric hand drill to slowly rotate and tunnel, wherein the rotation direction of the spring is required to be forward;
step three: after the plug impregnating varnish is crushed and loosened, a spring is taken out, an air pipe is inserted from the other end of the copper pipe orifice of the same branch, sealing is carried out, the air pipe is connected with an air compressor, high-pressure air is introduced, and the plug impregnating varnish blocks and residues are blown out;
step four: repeating the first, second and third operation steps until the impregnating varnish of the plug is completely cleaned; if the length of the spring does not meet the requirement in the process, the spring with the proper length needs to be cut again to ensure that the spring is in a proper compression stress state.
Further, in the second step, the length of the cut spring is a preset distance which can extend out of the pipe orifice.
Compared with the prior art, the invention has the following advantages and beneficial effects:
the method is simple to operate, is not limited by a site and a production process of the generator, has no damage to the generator, and can efficiently solve the problem of blockage of a cooling pipeline of the generator. The method has the advantages that any part of the generator does not need to be disassembled, and parts such as cooling copper pipes, stator coils and the like do not need to be reworked and scrapped, so that the reworking workload and the material loss are greatly reduced, the method has practical application value, and is worthy of popularization.
Drawings
Fig. 1 is a schematic diagram of the implementation of the method of the invention on a generator.
Detailed Description
The present invention will be described in further detail with reference to examples and drawings, but the present invention is not limited thereto.
As shown in fig. 1, a cooling copper pipe 2 is embedded in a stator core 1 of the generator, the cooling copper pipe 2 is welded to form a plurality of branches, two ends of each branch are respectively provided with a pipe orifice 6, and a plug impregnating varnish 3 is located in the cooling copper pipe 2. The method for dredging the cooling pipeline of the generator provided by the embodiment specifically comprises the following steps:
the method comprises the following steps: and (3) properly heating the plug impregnating varnish 3 by aligning the gun mouth of the hot air gun with the cooling copper pipe orifice 6, softening the plug impregnating varnish 3 and reducing the adhesive force of the plug impregnating varnish.
Step two: and (3) cutting the spring 4 by using a grinding wheel cutting machine according to the blocking position, wherein the length of the spring 4 is about 100mm of that of the extending pipe orifice 6, clamping one end of the spring 4 by using a chuck of an electric hand drill, extending the other end of the spring 4 into the cooling copper pipe 2, enabling the spring 4 to be pushed to the position of the blocking object impregnating varnish 3, pressing a switch of the electric hand drill, and enabling the electric hand drill to slowly rotate and tunnel, wherein the rotation direction of the spring 4 is required to be forward.
Step three: after the plug impregnating varnish 3 is crushed and loosened, the spring 4 is taken out, the air pipe 5 is inserted into the other end copper pipe opening 6 of the same branch, sealing is well done, the air pipe 5 is connected with an air compressor, high-pressure air is introduced, and the plug impregnating varnish blocks and residues are blown out.
Step four: and repeating the first, second and third operation steps until the plug impregnating varnish is completely cleaned. If the spring is not long enough in the process, the spring with the proper length needs to be cut again to ensure that the spring is in a proper compression stress state.
The impregnating varnish is the most difficult to clean than other types of plugs, and therefore the method of the present invention described above is equally applicable to unblocking other plugs of generator cooling ducts. The spring of suitable size should be selected and neither too thick nor too thin. If the spring is too thick, the copper pipe is difficult to pass through the corner, and if the spring is too thin, the force of the spring is not enough to break the impregnating varnish, so that the aim of dredging is not fulfilled.
The above embodiments are preferred embodiments of the present invention, but the present invention is not limited to the above embodiments, and any other changes, modifications, substitutions, combinations, and simplifications which do not depart from the spirit and principle of the present invention should be construed as equivalents thereof, and all such changes, modifications, substitutions, combinations, and simplifications are intended to be included in the scope of the present invention.
Claims (3)
1. A method for dredging a cooling pipeline of a generator is characterized in that a cooling copper pipe is embedded in a stator core of the generator and welded to form a plurality of branches, pipe orifices are formed at two ends of each branch, and a plug impregnating varnish is located in the cooling copper pipe; the method is characterized in that firstly, the plug impregnating varnish is heated to be softened, then the spring is stretched into the cooling copper pipe and is pushed to the position of the plug impregnating varnish, then the spring is slowly rotated to advance, the plug impregnating varnish is smashed by the spring to fall off, then the spring is taken out, high-pressure air is introduced into the cooling copper pipe of the corresponding branch, the plug impregnating varnish blocks and residues are blown out, and the process is repeated until the plug impregnating varnish on all branches is completely cleaned.
2. The method for dredging the cooling pipeline of the generator as claimed in claim 1, wherein: the method comprises the following steps:
the method comprises the following steps: a gun mouth of a hot air gun is aligned to a pipe mouth of the cooling copper pipe, and the impregnating varnish for the blockage is heated to soften the impregnating varnish for the blockage and reduce the adhesive force of the impregnating varnish for the blockage;
step two: cutting the spring by using a grinding wheel cutting machine according to the blocking position, clamping one end of the spring by using a chuck of an electric hand drill, extending the other end of the spring into the cooling copper pipe, enabling the spring to be pushed to the position of the impregnating varnish of the blocking object, and pressing a switch of the electric hand drill to enable the electric hand drill to slowly rotate and tunnel, wherein the rotation direction of the spring is required to be forward;
step three: after the plug impregnating varnish is crushed and loosened, a spring is taken out, an air pipe is inserted from the other end of the copper pipe orifice of the same branch, sealing is carried out, the air pipe is connected with an air compressor, high-pressure air is introduced, and the plug impregnating varnish blocks and residues are blown out;
step four: repeating the first, second and third operation steps until the impregnating varnish of the plug is completely cleaned; if the length of the spring does not meet the requirement in the process, the spring with the proper length needs to be cut again to ensure that the spring is in a proper compression stress state.
3. The method for dredging the cooling pipeline of the generator as claimed in claim 2, wherein: in the second step, the length of the cut spring is a preset distance capable of extending out of the pipe orifice.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202111330260.1A CN113972796A (en) | 2021-11-11 | 2021-11-11 | Method for dredging cooling pipeline of generator |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202111330260.1A CN113972796A (en) | 2021-11-11 | 2021-11-11 | Method for dredging cooling pipeline of generator |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN113972796A true CN113972796A (en) | 2022-01-25 |
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Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN202111330260.1A Pending CN113972796A (en) | 2021-11-11 | 2021-11-11 | Method for dredging cooling pipeline of generator |
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| Country | Link |
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| CN (1) | CN113972796A (en) |
Citations (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN201339232Y (en) * | 2008-12-22 | 2009-11-04 | 徐帆云 | Pipeline dredging device |
| CN202962976U (en) * | 2012-12-24 | 2013-06-05 | 调兵山市龙顺橡胶制品有限公司 | Cleaning machine for rubber scraps of rubber hoses |
| CN106487124A (en) * | 2015-08-24 | 2017-03-08 | 无锡博华机电有限公司 | The direct-cooled internal fastening type cooling structure of electro spindle stator |
| CN106964615A (en) * | 2017-04-06 | 2017-07-21 | 佛山市斯派力管业科技股份有限公司 | The interior scraping welding slag and residual substance treating method of a kind of middle-size and small-size ratio-frequency welding header |
| CN111921993A (en) * | 2020-07-01 | 2020-11-13 | 深圳供电局有限公司 | Pipeline dredging device |
-
2021
- 2021-11-11 CN CN202111330260.1A patent/CN113972796A/en active Pending
Patent Citations (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN201339232Y (en) * | 2008-12-22 | 2009-11-04 | 徐帆云 | Pipeline dredging device |
| CN202962976U (en) * | 2012-12-24 | 2013-06-05 | 调兵山市龙顺橡胶制品有限公司 | Cleaning machine for rubber scraps of rubber hoses |
| CN106487124A (en) * | 2015-08-24 | 2017-03-08 | 无锡博华机电有限公司 | The direct-cooled internal fastening type cooling structure of electro spindle stator |
| CN106964615A (en) * | 2017-04-06 | 2017-07-21 | 佛山市斯派力管业科技股份有限公司 | The interior scraping welding slag and residual substance treating method of a kind of middle-size and small-size ratio-frequency welding header |
| CN111921993A (en) * | 2020-07-01 | 2020-11-13 | 深圳供电局有限公司 | Pipeline dredging device |
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Application publication date: 20220125 |
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