CN204649912U - A kind of electrode assembly causing experiment for electric branch - Google Patents
A kind of electrode assembly causing experiment for electric branch Download PDFInfo
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- CN204649912U CN204649912U CN201520419940.4U CN201520419940U CN204649912U CN 204649912 U CN204649912 U CN 204649912U CN 201520419940 U CN201520419940 U CN 201520419940U CN 204649912 U CN204649912 U CN 204649912U
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Abstract
Cause an electrode assembly for experiment for electric branch, belong to cable insulation material anti-electricity tree performance study technical field.In order to solve existing experimental technique, the utility model exists that data scatter is comparatively large, needle point or tungsten filament is easily damaged or flexural deformation, sample preparation difficulty, the experiment success rate that causes are low and the problem of waste material.Blade high-field electrode is stainless steel blade, knife edge radius-of-curvature≤10 μm of blade high-field electrode, knife edge two ends are fillet, fillet radius-of-curvature is 3mm-5mm, blade center section excises, blade high-field electrode is connected with high-voltage power supply through high-voltage conducting wires, blade high-field electrode and high-voltage conducting wires are embedded between two sheet specimens hot-forming, sample lower surface coated with conductive elargol forms conductive silver glue electrode, conductive silver glue electrode contacts with sheet metal ground electrode, sheet metal ground electrode is by earth lead ground connection, be used for electric branch initiation experimental electrode device during experiment to be immersed in fluid insulation.The utility model is used for electric branch and causes experiment.
Description
Technical field
The utility model relates to a kind of cable insulation material electrical tree aging process experimental provision, belongs to cable insulation material resistance to electricity tree performance study technical field.
Background technology
Along with the fast development of economy and people increase gradually for the demand of electric energy, the consumption of high-tension cable increases year by year, and electric pressure improves constantly.The principal element that current restriction high-tension cable electric pressure improves further is exactly the electric branch in cable insulation material, electric branch is one of insulating material modal ageing form under high electric field long term, can make to occur dendritic discharge channel in insulating material, make the Electric Field Distribution Severe distortion in insulating material and insulator arrangement, and then insulating material is punctured and lost efficacy.Electric branch has a strong impact on for the job stability of high-tension cable and life-span, and therefore, electrical tree aging process is popular research topic always.
The electrode system that research electric branch phenomenon is conventional both at home and abroad is at present needle to board electrode system, but find to there is open defect when utilizing needle to board electrode system to cause electric branch in studying for a long period of time: first, because the physical strength of needle point is lower, in making needle to board electrode specimen, needle point easily ruptures or is out of shape, and the needle point electric field of various sample is differed greatly; In addition, because insulating material of polymer internal microstructure is very complicated, for the most frequently used cable insulation material tygon, tygon is the material that a kind of crystallization phase and amorphous phase coexist, and tygon spherocrystal size and pin electrode needle point radius-of-curvature size are about the same order of magnitude, when needle point is in the diverse location of spherocrystal, produce a very large impact to the initiation of electric branch and growth, when therefore utilizing needle to board electrode systematic study electric branch, data scatter is very large.For this reason, some researchers change employing tungsten filament-plate electrode system into and cause electric branch, and this kind of electrode structure makes there are enough contacts area between electrode and polymkeric substance, and the efficiency causing electric branch is higher, and data scatter diminishes, and achieves certain improvement.But for providing sufficiently high electric field to need tungsten filament diameter below 10 μm, therefore in sample making course, tungsten filament often occurs fractureing or the situation such as flexural deformation, causes sample preparation success ratio very low and waste material.As can be seen here, still lack a kind of convenience, the efficient electrode system causing electric branch at present, this is unfavorable for carrying out of the insulating material performance study of resistance to electric branch.
Utility model content
Give hereinafter about brief overview of the present utility model, to provide about the basic comprehension in some of the present utility model.Should be appreciated that this general introduction is not summarize about exhaustive of the present utility model.It is not that intention determines key of the present utility model or pith, neither intended limitation scope of the present utility model.Its object is only provide some concept in simplified form, in this, as the preorder in greater detail discussed after a while.
Given this, according to an aspect of the present utility model, provide a kind of electrode assembly causing experiment for electric branch, electric branch is caused at least to solve existing employing needle to board electrode system, the easily damaged distortion of needle point, cause the low and problem that data scatter is large of electric branch efficiency, and adopt tungsten filament-plate electrode system to cause electric branch, tungsten filament diameter is below 10 μm, fractureing or diastrophic situation often appears in tungsten filament, cause sample preparation and cause experiment success rate low and waste material problem.
A kind of electrode assembly causing experiment for electric branch of the utility model, comprises blade high-field electrode, conductive silver glue electrode, sample, fluid insulation, sheet metal ground electrode, high-voltage conducting wires and earth lead, described blade high-field electrode is stainless steel blade, knife edge radius-of-curvature≤10 μm of blade high-field electrode, knife edge two ends are fillet, fillet radius-of-curvature is 3mm-5mm, blade center section excises, blade high-field electrode is connected with high-voltage power supply through high-voltage conducting wires, blade high-field electrode and high-voltage conducting wires are buried underground in the sample, the lower surface coated with conductive elargol of sample forms conductive silver glue electrode, conductive silver glue electrode contacts with sheet metal ground electrode, sheet metal ground electrode is by earth lead ground connection, the electrode assembly being used for electric branch initiation experiment during experiment is immersed in fluid insulation.
Further: described sheet metal ground electrode is aluminum plate electrodes or copper plate electrode.
Further: described fluid insulation is transformer oil, dimethyl silicon oil or polyisobutylene.
Further: the knife edge radius-of-curvature of described blade high-field electrode is 5 μm, and knife edge two ends fillet radius-of-curvature is 4mm.
Further: the thickness of described sample is 3mm-6mm.
The effect that the utility model reaches is:
(1) using pre-buried blade as high-field electrode, blade has enough little radius-of-curvature, very high electric field intensity can be provided, and the contact area of electrode and sample is larger, can comparatively fast cause multiple electric branch, shorten experimental period, and the dispersiveness of data be little, for studying the resistance to electric branch performance of insulating material, there is good actual application value.
(2) rounded shapes is made in blade high-field electrode both sides, avoids knife edge two ends electric field too high and produces harmful effect to experiment.
(3) blade high-field electrode has sufficiently high physical strength, there will not be the situation of electrode damage in sample making course, and sample preparation success ratio is high, sample preparation cycle time.
Accompanying drawing explanation
Fig. 1 is the front view of the electrode assembly causing experiment according to embodiment of the present utility model for electric branch;
Fig. 2 is the stereographic map of the electrode assembly causing experiment according to embodiment of the present utility model for electric branch;
In figure: 1-blade high-field electrode; 2-conductive silver glue electrode; 3-sample; 4-sheet metal ground electrode; 5-high-voltage conducting wires; 6-earth lead; 7-high-voltage power supply.
Embodiment
To be described one exemplary embodiment of the present utility model by reference to the accompanying drawings hereinafter.For clarity and conciseness, all features of actual embodiment are not described in the description.But, should understand, must make a lot specific to the decision of embodiment in the process of any this practical embodiments of exploitation, to realize the objectives of developer, such as, meet those restrictive conditions relevant to system and business, and these restrictive conditions may change to some extent along with the difference of embodiment.In addition, although will also be appreciated that development is likely very complicated and time-consuming, concerning the those skilled in the art having benefited from the utility model disclosure, this development is only routine task.
At this, also it should be noted is that, in order to avoid the utility model fuzzy because of unnecessary details, illustrate only in the accompanying drawings with according to the closely-related apparatus structure of scheme of the present utility model and/or treatment step, and eliminate other details little with the utility model relation.
Embodiment of the present utility model provides a kind of electrode assembly causing experiment for electric branch, comprises blade high-field electrode 1, conductive silver glue electrode 2, sample 3, fluid insulation, sheet metal ground electrode 4, high-voltage conducting wires 5 and earth lead 6; Knife edge radius-of-curvature≤10 μm of described blade high-field electrode 1, knife edge two ends are fillet, fillet radius-of-curvature is 3mm-5mm, blade center section excises, blade high-field electrode 1 is connected with high-voltage power supply 7 through high-voltage conducting wires 5, blade high-field electrode 1 and high-voltage conducting wires 5 are embedded in sample 3, the lower surface coated with conductive elargol of sample 3 forms conductive silver glue electrode 2, conductive silver glue electrode 2 contacts with sheet metal ground electrode 4, sheet metal ground electrode 4 is by earth lead 6 ground connection, and the electrode assembly being used for electric branch initiation experiment during experiment is immersed in fluid insulation.
In addition, according to a kind of implementation, described sheet metal ground electrode 4 is made up of aluminium sheet or copper coin.
In addition, according to a kind of implementation, described fluid insulation is transformer oil, dimethyl silicon oil or polyisobutylene.
In addition, according to a kind of implementation, described blade high-field electrode 1 is stainless steel blade, and its knife edge radius-of-curvature is 5 μm, and knife edge two ends fillet radius-of-curvature is 4mm.
In addition, according to a kind of implementation, the thickness of described sample 3 is 3mm-6mm.
Known by describing above, above-mentioned according to the utility model using pre-buried blade as high-field electrode, the knife edge has less radius-of-curvature, sufficiently high electric field can be provided, efficiently, electric branch is caused rapidly, electric branch in convenient observation insulating material causes and growth, can be used for the resistance to electric branch performance studying insulating material, has good actual application value.
Although the embodiment that the utility model discloses as above, the embodiment that its content just adopts for the ease of understanding the technical solution of the utility model, is not intended to limit the utility model.Technician in any the utility model art; under the prerequisite not departing from the core technology scheme that the utility model discloses; any amendment and change can be made in the form implemented and details; but the protection domain that the utility model limits, the scope that still must limit with appending claims is as the criterion.
Claims (5)
1. cause an electrode assembly for experiment for electric branch, it is characterized in that: comprise blade high-field electrode (1), conductive silver glue electrode (2), sample (3), fluid insulation, sheet metal ground electrode (4), high-voltage conducting wires (5) and earth lead (6), blade high-field electrode (1) is stainless steel blade, knife edge radius-of-curvature≤10 μm of blade high-field electrode (1), knife edge two ends are fillet, fillet radius-of-curvature is 3mm-5mm, blade center section excises, blade high-field electrode (1) is connected with high-voltage power supply (7) through high-voltage conducting wires (5), blade high-field electrode (1) and high-voltage conducting wires (5) are embedded in sample (3), the lower surface coated with conductive elargol of sample (3) forms conductive silver glue electrode (2), conductive silver glue electrode (2) contacts with sheet metal ground electrode (4), sheet metal ground electrode (4) is by earth lead (6) ground connection, the electrode assembly being used for electric branch initiation experiment during experiment is immersed in fluid insulation.
2. a kind of electrode assembly causing experiment for electric branch according to claim 1, is characterized in that: described sheet metal ground electrode (4) is aluminum plate electrodes or copper plate electrode.
3. a kind of electrode assembly causing experiment for electric branch according to claim 1, is characterized in that: described fluid insulation is transformer oil, dimethyl silicon oil or polyisobutylene.
4. a kind of electrode assembly causing experiment for electric branch according to claim 1, it is characterized in that: described blade high-field electrode, its knife edge radius-of-curvature is 5 μm, and knife edge two ends fillet radius-of-curvature is 4mm.
5. a kind of electrode assembly causing experiment for electric branch according to claim 4, is characterized in that: the thickness of described sample (3) is 3mm-6mm.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201520419940.4U CN204649912U (en) | 2015-06-17 | 2015-06-17 | A kind of electrode assembly causing experiment for electric branch |
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| Application Number | Priority Date | Filing Date | Title |
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| CN201520419940.4U CN204649912U (en) | 2015-06-17 | 2015-06-17 | A kind of electrode assembly causing experiment for electric branch |
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| Publication Number | Publication Date |
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| CN204649912U true CN204649912U (en) | 2015-09-16 |
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| CN201520419940.4U Expired - Fee Related CN204649912U (en) | 2015-06-17 | 2015-06-17 | A kind of electrode assembly causing experiment for electric branch |
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Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN111025104A (en) * | 2019-12-27 | 2020-04-17 | 哈尔滨理工大学 | Temperature-adjustable polymer electric tree growth observation system |
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2015
- 2015-06-17 CN CN201520419940.4U patent/CN204649912U/en not_active Expired - Fee Related
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN111025104A (en) * | 2019-12-27 | 2020-04-17 | 哈尔滨理工大学 | Temperature-adjustable polymer electric tree growth observation system |
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| Date | Code | Title | Description |
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| C14 | Grant of patent or utility model | ||
| GR01 | Patent grant | ||
| CF01 | Termination of patent right due to non-payment of annual fee | ||
| CF01 | Termination of patent right due to non-payment of annual fee |
Granted publication date: 20150916 Termination date: 20160617 |