CN218974484U - Cable sheet sample water tree ageing device - Google Patents
Cable sheet sample water tree ageing device Download PDFInfo
- Publication number
- CN218974484U CN218974484U CN202223105093.3U CN202223105093U CN218974484U CN 218974484 U CN218974484 U CN 218974484U CN 202223105093 U CN202223105093 U CN 202223105093U CN 218974484 U CN218974484 U CN 218974484U
- Authority
- CN
- China
- Prior art keywords
- cup
- aging
- water tree
- cable
- sample
- Prior art date
- 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.)
- Active
Links
Images
Landscapes
- Testing Relating To Insulation (AREA)
Abstract
The utility model belongs to the technical field of cable ageing and discloses a cable sheet sample water tree ageing device which aims to solve the technical problems in the prior art of the cable sheet sample water tree ageing device.
Description
Technical Field
The utility model relates to the technical field of cable aging, in particular to a cable sheet sample water tree aging device.
Background
With the increase of the operation years of power cables of urban distribution networks in China, the problem of ageing of cable lines of a plurality of urban distribution networks is more serious. The cable operation working condition is complex, and the cable insulation layer is subjected to the action of comprehensive ageing factors such as voltage, moisture, defects and the like in the actual operation process and is caused to have a water tree. Studies have shown that water tree is one of the main factors that lead to insulation failure of urban distribution network cables. The cable running environment is different under different working conditions, so that the growth characteristics of the water tree are different. Cable flake samples are typically prepared in laboratory studies and water tree aging experiments are performed on the samples to study the water tree growth characteristics in cable insulation under different conditions.
There are several kinds of cable sheet sample water tree aging devices, which are usually composed of an aging cup body and a supporting part, wherein the cup body part is used for connecting a high voltage electrode and placing an aging solution, the supporting part is used for fixing a sample and connecting the ground electrode, so as to perform water tree aging, such as water tree growth characteristic research in crosslinked polyethylene insulation at different crosslinking temperatures (Chinese motor engineering journal, 2021,41 (16): 5758-5767) disclosed in 1, zhang Qiaofeng, zhou Kai, li Kangle, wang Xianjin, rao Xianjie, she Bin et al; 2. zhou Kai, tao Wenbiao, zhao Wei, yang Di, yang Mingliang et al, understanding the growth characteristics of water tree in crosslinked polyethylene at different temperatures in molecular orientation theory (high voltage technology, 2014,40 (12): 3665-3673); 3. zhou Yuanxiang, liu Jie, sha Yanchao, xu Dangguo, li Dawei, zheng Yibo et al disclose "analysis of the aging degree of XLPE water trees based on dielectric and physicochemical properties".
Although the basic constitution and the aging principle of the aging device are basically the same, the specific structures of different aging devices are different, and the differences of the specific structures correspond to different water tree aging experiment workload on one hand, and on the other hand, the water tree experiment results can be different, and even larger experiment errors can be generated. The ageing device cup top of water tree in 1, 2 is ageing bowl cover, and this ageing bowl cover is direct to be covered on the cup, leads to the bowl cover to open even drop easily when connecting, dismantling bowl cover copper electrode connecting wire, spills ageing solution in the cup outside, need clean and measure cup insulation resistance again with the outside solution of cup when ageing again, has increased a lot of work load. In addition, the size of the lower copper electrode (ground electrode) of the existing device is usually far smaller than that of a sample, the base is required to be screwed down when the water tree ages, the lower copper electrode is closely attached to the sample, at the moment, the middle of the sample is extruded by the lower copper electrode, and the sample part outside the copper electrode is not extruded, so that additional mechanical stress is caused in the sample, and the water tree ages and presents different characteristics and inaccuracy of aging results. The water tree aging device in document 3 also has the problems described above, and the lower side of the device has no supporting feet, which is inconvenient for grounding and water tree aging. In summary, a new water tree aging device is needed, and the structure of the new water tree aging device needs to be reasonably designed to overcome the defects in the aging device.
Disclosure of Invention
The utility model aims to solve the technical problems in the prior art water tree aging device and provides the cable sheet sample water tree aging device which is reasonable in structure and accurate and reliable in aging result.
In order to achieve the above purpose, the present utility model adopts the following technical scheme:
the utility model provides a cable flake sample water tree ageing device, including the cup, the bowl cover is equipped with to the detachable top of cup, be equipped with the water injection hole on the bowl cover, still can dismantle on the bowl cover and be equipped with the copper electrode, the lower part of going up the copper electrode stretches into in the cup, the lower part inboard of cup is equipped with the bottom of cup, the bottom of cup aperture has been seted up at the middle part of bottom of cup, the lower part of cup still is equipped with the lower wall body, the flake sample is equipped with to the lower wall body inboard, the pinhole has been seted up at the middle part of flake sample, the lower copper electrode is equipped with in the bottom of flake sample, and the middle part of lower copper electrode is equipped with the connecting electrode, the connecting electrode passes the unable adjustment base of dismantling and being fixed in the lower wall body inboard, the bottom of lower wall body is equipped with the pillar.
Further, a cup cover supporting step is arranged on the inner side of the top of the cup body, and the side wall of the cup cover supporting step is connected with the cup cover through threads.
Further, a rubber gasket is arranged between the sheet sample and the bottom of the cup bottom, and a gasket inner round hole is formed in the middle of the rubber gasket.
Further, the outside of the connecting electrode is provided with threads, the middle part of the fixed base is provided with a base threaded hole, and the connecting electrode is connected with the fixed base through threads and the joint is provided with a lower nut.
Further, the bottom of the lower wall body is uniformly provided with three wall body threaded holes along the circumferential direction, the top of the support column is provided with a threaded section, and the support column is connected with the lower wall body through threads.
Further, a water filling hole cover is arranged on the water filling hole.
Further, the upper copper electrode is connected with the cup cover through threads, and an upper nut is arranged at the joint of the upper copper electrode and the cup cover.
Compared with the prior art, the utility model has the following beneficial effects:
when the water tree aging of the cable sheet sample is carried out, the aging solution is injected into the cup body, the grounding of the lower copper electrode can be realized through the connecting electrode, and the water tree aging of the sheet sample can be carried out through the connection of the upper copper electrode and the power frequency power supply. The water injection Kong Fangbian on the cup cover of the device continuously adds the aging solution in the aging process, and avoids redundant work caused by the fact that the solution is sprinkled on the outer side of the cup body when the cup cover is opened to add the aging solution. The sheet sample, the lower copper electrode and the fixing base are cylindrical and have the same diameters, and the three parts are fixed in the inner cavity of the lower wall body, so that the structure of the device is simplified, the workload of assembling and sampling the sample is reduced, more importantly, the structure can enable the sheet sample, the cup bottom, the lower copper electrode and the sheet sample to be tightly and uniformly attached, additional mechanical stress caused by inconsistent sizes can be avoided, the accuracy and the reliability of an aging result are ensured, and the device is simple in structure and convenient to operate.
Because often will spill ageing solution in the cup outside when the bowl cover is opened by mistake, need dry the cup this moment, detect the cup insulation resistance rear again and can continue ageing experiments, increased redundant work load. The cup cover is in threaded connection with the cylindrical supporting step on the inner side of the top of the cup body, and can be fixed on the top of the cup body by rotating the cup cover, so that the cup cover can be prevented from being opened by mistake caused by clamping (taking) the copper electrode lead.
The sheet sample is obtained by tabletting the cylindrical die, a plurality of pinhole defects are required to be manufactured in a circular area in the middle of the sheet before aging to generate a water tree more quickly, the circular area is a water tree aging area, the sheet with the shape is convenient for placing the sample, and the water tree can be sliced and observed in the circular aging part in the middle of the sample.
The cup body support column has a certain height, can ensure that the connecting electrode has a certain distance from the workbench surface, and can prevent experimental faults and errors caused by the connecting electrode contacting with the horizontal plane.
Drawings
FIG. 1 is a schematic diagram of the structure of the present utility model.
Fig. 2 is an exploded view of the present utility model.
FIG. 3 is a schematic view of the connection of the lower copper electrode, the connection electrode and the fixing base.
FIG. 4 is a schematic diagram of an insulation resistance test according to the present utility model.
FIG. 5 is a schematic diagram of the aging of the water tree according to the present utility model.
The reference numerals have the following meanings: 1. a copper electrode is arranged; 2. a cup cover; 3. a top nut; 4. a water injection hole; 5. a water injection hole cover; 6. a cup body; 7. an upper cavity of the cup body; 8. a cup bottom; 9. a small hole at the bottom of the cup; 10. a rubber gasket; 11. a sheet sample; 12. a lower copper electrode; 13. connecting the electrodes; 14. a fixed base; 15. lower wall internal threads; 16. a support post; 17. an external thread of the cup cover; 18. the cup cover supports the step; 19. supporting the internal thread of the step; 20. a lower wall; 21. a wall threaded hole; 22. a circular hole in the gasket; 23. a sample circular aging region; 24. a pinhole; 25. fixing the external threads of the base; 26. a lower nut; 27. a threaded section; 28. a base threaded hole; 29. megameters; 30. handle, 31 power frequency power supply.
Detailed Description
The utility model is further described below with reference to the drawings and the detailed description.
As shown in fig. 1-3, a cable slice sample water tree aging device comprises a cup body 6, wherein the cup body 6 is made of polytetrafluoroethylene, a cup cover supporting step 18 is arranged on the inner side of the top of the cup body 6, a supporting step internal thread 19 is arranged on the side wall of the cup cover supporting step 18, a cup cover external thread 17 is arranged on the outer side of a cup cover 2, the cup cover supporting step 18 is connected with the cup cover 2 through threads, the cup cover 2 is made of epoxy resin, a water injection hole 4 is formed in the cup cover 2, the water injection hole 4 is a cylindrical pore canal, a water injection hole cover 5 is arranged on the water injection hole 4, an upper copper electrode 1 is further arranged on the cup cover 2 through threads, and an upper nut 3 is arranged at the joint of the cup cover and the cup cover.
The lower part of the upper copper electrode 1 stretches into a cup upper cavity 7 in the cup 6, a cup bottom 8 is fixedly arranged on the inner side of the lower part of the cup 6, a cup bottom small hole 9 is formed in the middle of the cup bottom 8, a lower wall body 20 which is of an integral structure with the cup 6 is further arranged on the lower part of the cup 6, a sheet sample 11 is arranged on the inner side of the lower wall body 20, a pinhole 24 is formed in a middle circular aging area 23 of the sheet sample 11, a rubber gasket 10 is arranged between the sheet sample 11 and the bottom of the cup bottom 8, a gasket inner round hole 22 is formed in the middle of the rubber gasket 10, a lower copper electrode 12 is arranged on the bottom of the sheet sample 11, a connecting electrode 13 is arranged in the middle of the lower copper electrode 12, threads are formed in the outer side of the connecting electrode 13, base threaded holes 28 are formed in the middle of the connecting electrode 13 and the fixed base 14, lower nuts 26 are arranged at the connecting positions of the connecting electrode 13 and the fixed base 14 through threads, the sheet sample 11, the lower copper electrode 12 and the fixed base 14 are all cylindrical and have the same diameter, threads 15 are arranged in the lower wall body, external threads 25 are arranged on the outer side of the fixed base 14, a lower wall body 20 is uniformly distributed on the bottom of the connecting base, the lower wall body 12 and the lower wall body and the fixed base 14 is connected with the lower wall body through three threads 21 along the circumferential directions of the bottom wall 20, and the top portion 16 is uniformly distributed on the bottom wall 16, and the bottom threads 20 are uniformly distributed on the bottom wall body, and the bottom portion is provided with threads 21.
As shown in fig. 4, before the water tree aging, the sample insulation resistance is measured by the megohmmeter 29, the megohmmeter line terminal L is connected to the upper copper electrode 1, the megohmmeter ground terminal E is connected to the lower copper electrode 12 and the connection electrode 13, and then the handle 30 is swung to test the sample insulation resistance, and after the test is passed, the water tree aging can be performed.
As shown in fig. 5, when the water tree aging test is performed, the aging solution is injected into the cup 6 through the water injection hole 4, the power frequency power supply 31 is connected to the upper copper electrode 1, and the lower copper electrode 12 is grounded, so that the water tree aging test can be performed on the sample. The lower part of the upper copper electrode 1 is immersed in the aging solution in the cup 6, and the aging solution is in contact with the upper surface of the sheet sample 12, when the upper copper electrode 1 is connected to a high-voltage lead, a high-voltage potential is applied to the upper surface of the sheet sample 12, and in addition, the lower surface of the sheet sample 12 is grounded through the lower copper electrode 12-level connection electrode 13, so that a power frequency alternating current high voltage can be applied to the body between the upper and lower surfaces of the sheet sample 12, thereby performing water tree aging on the sample.
Claims (7)
1. The utility model provides a cable thin slice sample water tree ageing device, includes cup (6), characterized by: cup lid (2) are equipped with in the detachable top of cup (6), be equipped with water injection hole (4) on cup lid (2), still can dismantle on cup lid (2) and be equipped with copper electrode (1), the lower part of going up copper electrode (1) stretches into in cup (6), the lower part inboard of cup (6) is equipped with bottom of cup (8), bottom of cup aperture (9) have been seted up at the middle part of bottom of cup (8), the lower part of cup (6) still is equipped with wall (20), sheet sample (11) are equipped with in wall (20) inboard down, pinhole (24) have been seted up at the middle part of sheet sample (11), copper electrode (12) are down equipped with in the bottom of sheet sample (11), and the middle part of copper electrode (12) is equipped with connecting electrode (13), connecting electrode (13) pass can dismantle and be fixed in bottom of wall (20) inboard unable adjustment base (14), the bottom of wall (20) is equipped with pillar (16).
2. The device for aging a water tree of a cable flake sample according to claim 1, wherein: the inner side of the top of the cup body (6) is provided with a cup cover supporting step (18), and the side wall of the cup cover supporting step (18) is connected with the cup cover (2) through threads.
3. The device for aging a water tree of a cable flake sample according to claim 2, wherein: a rubber gasket (10) is arranged between the sheet sample (11) and the bottom of the cup bottom (8), and a gasket inner round hole (22) is formed in the middle of the rubber gasket (10).
4. A cable flake sample water tree aging device according to claim 3, wherein: the outer side of the connecting electrode (13) is provided with threads, the middle part of the fixed base (14) is provided with a base threaded hole (28), the connecting electrode (13) is connected with the fixed base (14) through threads, and the joint is provided with a lower nut (26).
5. A cable sheet sample water tree aging apparatus according to any one of claims 1 to 4, wherein: three wall threaded holes (21) are uniformly distributed in the bottom of the lower wall body (20) along the circumferential direction, a threaded section (27) is arranged at the top of the support column (16), and the support column (16) is connected with the lower wall body (20) through threads.
6. The device for aging a water tree of a cable flake sample according to claim 1, wherein: the water injection hole (4) is provided with a water injection hole cover (5).
7. The device for aging a water tree of a cable flake sample according to claim 2, wherein: the upper copper electrode (1) is connected with the cup cover (2) through threads, and an upper nut (3) is arranged at the joint.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202223105093.3U CN218974484U (en) | 2022-11-22 | 2022-11-22 | Cable sheet sample water tree ageing device |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202223105093.3U CN218974484U (en) | 2022-11-22 | 2022-11-22 | Cable sheet sample water tree ageing device |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN218974484U true CN218974484U (en) | 2023-05-05 |
Family
ID=86153130
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN202223105093.3U Active CN218974484U (en) | 2022-11-22 | 2022-11-22 | Cable sheet sample water tree ageing device |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN218974484U (en) |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN117368620A (en) * | 2023-12-04 | 2024-01-09 | 清华大学深圳国际研究生院 | Composite insulator aging experimental device |
-
2022
- 2022-11-22 CN CN202223105093.3U patent/CN218974484U/en active Active
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN117368620A (en) * | 2023-12-04 | 2024-01-09 | 清华大学深圳国际研究生院 | Composite insulator aging experimental device |
| CN117368620B (en) * | 2023-12-04 | 2024-04-12 | 清华大学深圳国际研究生院 | Composite insulator aging experimental device |
Similar Documents
| Publication | Publication Date | Title |
|---|---|---|
| CN218974484U (en) | Cable sheet sample water tree ageing device | |
| CN105676081B (en) | Direct current cables based on ultralow frequency dielectric loss squeezes out insulation ag(e)ing state evaluating method | |
| CN105717434A (en) | Electrode device for measuring electrical strength of composite insulator silicon rubber umbrella skirt and measuring method | |
| CN110095405B (en) | Sealing device for high-temperature high-pressure corrosion electrochemical working electrode and use method | |
| CN105301465A (en) | Direct current gas insulation electrical equipment partial discharge decomposition simulation experiment apparatus | |
| CN108957263B (en) | XLPE cable accessory interface multi-stress coupling simulation test device and method | |
| WO2013159284A1 (en) | Aging test device of xlpe medium voltage cable water tree | |
| CN104820171B (en) | A kind of paper oil insulation partial discharge test lubricating cup | |
| CN115808586A (en) | Damp-heat aging evaluation device and method for composite insulator under stress action | |
| CN103674786B (en) | Permeability tester under electric field action | |
| CN204731367U (en) | A kind of paper oil insulation partial discharge test lubricating cup | |
| CN103901276A (en) | Measurement device and method for detecting oilpaper conductivity in high-voltage DC electric field | |
| CN209927765U (en) | Electrochemical impedance spectrum testing device and electrochemical testing system for electrolyte membrane | |
| CN107576898A (en) | Measure the experimental provision of iknsulating liquid lightning impulse voltage endurance | |
| CN111665425A (en) | Device and method for rapidly detecting tree resistance of crosslinked polyethylene cable | |
| CN210571898U (en) | Sealing device for high-temperature high-pressure corrosion electrochemical working electrode | |
| CN205404744U (en) | A electrode assembly for measuring composite insulator silicon rubber full skirt electrical strength | |
| CN209542503U (en) | Film conductivity test device | |
| CN112415353A (en) | Electrode device and method suitable for optical fiber voltage resistance performance test | |
| CN204008856U (en) | A kind of crosslinked cable shielding resistor detecting device | |
| CN219737364U (en) | Solid-state battery mould and testing arrangement | |
| CN220553687U (en) | Cable connecting sleeve extrusion device | |
| CN110780167B (en) | Insulating property detection device for barrel type composite insulating material | |
| CN215180725U (en) | Adjustable storage battery tester with data display function | |
| CN218331787U (en) | Symmetrical electrode test fixture |
Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| GR01 | Patent grant | ||
| GR01 | Patent grant |