CN203858260U - Special stress ring for testing partial discharge of 35kV or lower crosslinked polyethylene power cable - Google Patents
Special stress ring for testing partial discharge of 35kV or lower crosslinked polyethylene power cable Download PDFInfo
- Publication number
- CN203858260U CN203858260U CN201420157634.3U CN201420157634U CN203858260U CN 203858260 U CN203858260 U CN 203858260U CN 201420157634 U CN201420157634 U CN 201420157634U CN 203858260 U CN203858260 U CN 203858260U
- Authority
- CN
- China
- Prior art keywords
- ring
- power cable
- inner ring
- cable
- crosslinked polyethylene
- 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.)
- Expired - Lifetime
Links
- 229920003020 cross-linked polyethylene Polymers 0.000 title abstract 4
- 239000004703 cross-linked polyethylene Substances 0.000 title abstract 4
- 239000004698 Polyethylene Substances 0.000 claims description 15
- -1 polyethylene Polymers 0.000 claims description 15
- 229920000573 polyethylene Polymers 0.000 claims description 15
- 210000004907 gland Anatomy 0.000 claims description 13
- 239000000463 material Substances 0.000 abstract description 3
- 230000015556 catabolic process Effects 0.000 abstract 2
- 239000012212 insulator Substances 0.000 abstract 1
- 239000002184 metal Substances 0.000 abstract 1
- 239000004020 conductor Substances 0.000 description 6
- 238000009413 insulation Methods 0.000 description 5
- 238000005516 engineering process Methods 0.000 description 3
- 239000003921 oil Substances 0.000 description 3
- 238000009434 installation Methods 0.000 description 2
- 238000007789 sealing Methods 0.000 description 2
- 238000001514 detection method Methods 0.000 description 1
- 238000004519 manufacturing process Methods 0.000 description 1
- 238000012428 routine sampling Methods 0.000 description 1
- 238000009666 routine test Methods 0.000 description 1
- 239000004065 semiconductor Substances 0.000 description 1
- 229920002379 silicone rubber Polymers 0.000 description 1
Landscapes
- Testing Relating To Insulation (AREA)
Abstract
The utility model relates to a special stress ring for testing partial discharge of a 35kV or lower crosslinked polyethylene power cable. The stress ring is composed of two metal pieces which are an inner ring and an outer ring, wherein screws on the inner ring enable the inner ring to be fixed on a cable shielding layer; the inner ring of the stress ring is provided with an external thread, and the upper end of the inner ring is a circular ring body with the diameter being 80-420mm; the outer ring is provided with an internal thread, and the lower end of the outer ring is a circular ring body with the diameter being 80-420mm; and the inner ring and the outer ring are fixed by using the threads and then clamp a voltage-sharing sleeve therebetween, and the combination height of the inner ring and the outer ring is 100-300mm. The stress ring provided by the utility model enable a test terminal to be conveniently and rapidly installed, material consumption is low, and the stress ring can be used repeatedly. The field intensity of end parts of the crosslinked polyethylene power cable or other shielded power cables is centralized under the action of high voltage, and end breakdown easily occurs; and especially, discharge easily occurs between an insulator of a cable core of the crosslinked polyethylene power cable and an outer shield of the power cable, thereby influencing the tests or flashover or breakdown or the like.
Description
Technical field
The utility model relates to power cable detection device, particularly a kind of 35KV and following cross-inked polyethylene power cable shelf depreciation is tested special stress loop.
Background technology
According to cross-inked polyethylene power cable, power cable international standard and national standard requirement, cables manufacturing business and electric wire testing agency are to cross-inked polyethylene power cable, power cable dispatch from the factory routine test or sampling test, all will carry out voltage-withstand test, cross-inked polyethylene power cable also will carry out shelf depreciation test.
Cross-inked polyethylene power cable or other power cables are under action of high voltage, cable end field intensity is concentrated, easily there is end and puncture, especially easily electric discharge between the insulation of cross-inked polyethylene power cable core and external shield, thus affect test or flashover, puncture etc.
Utility model content
The purpose of this utility model is to provide a kind of 35KV and following cross-inked polyethylene power cable shelf depreciation to test special stress loop, it mainly solves the existing technical matters of above-mentioned prior art, it makes, and test terminal is easy for installation, quick, material consumption is few, and reusable.Cross-inked polyethylene power cable or other band shielding power cables are under action of high voltage, cable end field intensity is concentrated, easily there is end and puncture, especially easily electric discharge between the insulation of cross-inked polyethylene power cable core and external shield, thus affect test or flashover, puncture etc.
For solving the problems of the technologies described above, the utility model is achieved in that
35KV and following cross-inked polyethylene power cable shelf depreciation are tested a special stress loop, it is characterized in that: described stress loop is made up of interior ring and two metalworks of outer shroud; Screw on interior ring is fixed on cable shield it; The interior endless belt external thread of described stress loop, upper end is the torus of diameter 80-420mm; Described outer endless belt internal thread, lower end is the torus of diameter 80-420mm; After inner and outer rings is fixing with screw thread, equal gland geometrical clamp is located between the two, the height after inner and outer rings combination is 100-300mm.
The utility model is compared with existing conventional art, and tool has the following advantages: make that test terminal is easy for installation, quick, material consumption is few, and reusable, evenly local field strength.
Brief description of the drawings
Fig. 1 is structural representation of the present utility model.
Fig. 2 is the structural representation that uses 35KV of the present utility model and following stress loop-oil sealing type cross-inked polyethylene power cable shelf depreciation test terminal.
Embodiment
Refer to Fig. 1, the utility model discloses a kind of 35KV and following cross-inked polyethylene power cable shelf depreciation is tested special stress loop.As shown in the figure: described stress loop is made up of interior ring 1 and 2 two metalworks of outer shroud; Screw 9 on interior ring 1 is fixed on cable shield 8 it; The interior ring 1 of described stress loop is with external thread, and upper end is the torus of diameter 80-420mm; Described outer shroud 2 is with internal thread, and lower end is the torus of diameter 80-420mm; After inner and outer rings is fixing with screw thread, equal gland 3 geometrical clamps are located between the two, the height after inner and outer rings combination is 100-300mm.
Below in conjunction with Fig. 2, the use for the utility model in 35KV and following stress loop-oil sealing type cross-inked polyethylene power cable shelf depreciation test terminal, is described in further details the utility model.As shown in the figure: it comprises stress loop, all gland 3, high pressure connect grading ring 5; This stress loop is made up of the interior ring 1 being threaded and 2 two metalworks of outer shroud; Screw 9 on interior ring 1 can make it be fixed on cable shield 8; Described equal gland 3 is enclosed within on cable insulation core, and all the semiconduction interface of gland 3 is connected with interior ring 1 lower end, and 2 of outer shrouds cover on outside connecting portion, all on gland 3, also has 5-16 full skirt 3; There is cable conductor link 4 lower end of described equal gland 3, and cable conductor link 4 is connected with the core conductor of cable insulation core; Described high pressure connects grading ring 5 upper ends and is connected with cable conductor link 4, and the lower end that high pressure connects grading ring 5 has high pressure connection 7 to be connected with hi-line, has inner bolt 6 that high pressure is connected to grading ring 5 and be connected with cable conductor link 4 on high pressure connection grading ring 5; In described equal gland 3, be sealed with high pressure resistant oil product.
As preferably, the upper strata that described high pressure connects grading ring 5 is the torus of diameter 120-400mm, and lower floor is the torus of diameter 120-600mm, can ensure to contact with cable core good time to avoid high pressure bloom phenomenon to occur.
As preferably, between the levels of described high pressure connection grading ring 5, be fixed on the core conductor of cable insulation core with inner bolt 6.
As preferably, the full skirt 8 on described equal gland 3 is cone-shaped body.
As preferably, the height of described equal gland 2 is 0.45-0.80m, so both can meet testing requirements, can reduce again the stripping length at test cable two ends.
As preferably, the upper terminal inner lining silicon rubber semiconductor layer of described equal gland 2 is connected with stress loop 1 lower end.
As preferably, the two ends up and down of described equal gland 3 are connected respectively grading ring 5 and seal with high pressure by stress loop.
Be only preferred embodiment of the present utility model in sum, be not used for limiting practical range of the present utility model.Be that all equivalences of doing according to the content of the utility model claim change and modify, all should be technology category of the present utility model.
Claims (1)
1. 35KV and following cross-inked polyethylene power cable shelf depreciation are tested a special stress loop, it is characterized in that: described stress loop is made up of interior ring (1) and (2) two metalworks of outer shroud; Screw (9) on interior ring (1) is fixed on cable shield (8) it; Interior ring (1) the band external thread of described stress loop, upper end is the torus of diameter 80-420mm; Described outer shroud (2) band internal thread, lower end is the torus of diameter 80-420mm; After inner and outer rings is fixing with screw thread, equal gland (3) geometrical clamp is located between the two, the height after inner and outer rings combination is 100-300mm.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201420157634.3U CN203858260U (en) | 2014-04-02 | 2014-04-02 | Special stress ring for testing partial discharge of 35kV or lower crosslinked polyethylene power cable |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201420157634.3U CN203858260U (en) | 2014-04-02 | 2014-04-02 | Special stress ring for testing partial discharge of 35kV or lower crosslinked polyethylene power cable |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN203858260U true CN203858260U (en) | 2014-10-01 |
Family
ID=51608106
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201420157634.3U Expired - Lifetime CN203858260U (en) | 2014-04-02 | 2014-04-02 | Special stress ring for testing partial discharge of 35kV or lower crosslinked polyethylene power cable |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN203858260U (en) |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN108711820A (en) * | 2018-05-28 | 2018-10-26 | 云南电网有限责任公司昆明供电局 | A kind of plug-in Oil-filled Cable End and its application without shelf depreciation |
-
2014
- 2014-04-02 CN CN201420157634.3U patent/CN203858260U/en not_active Expired - Lifetime
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN108711820A (en) * | 2018-05-28 | 2018-10-26 | 云南电网有限责任公司昆明供电局 | A kind of plug-in Oil-filled Cable End and its application without shelf depreciation |
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Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| C14 | Grant of patent or utility model | ||
| GR01 | Patent grant | ||
| CX01 | Expiry of patent term |
Granted publication date: 20141001 |
|
| CX01 | Expiry of patent term |