CN102435923A - Withstand voltage test terminal structure of cross-linked cable under 110kV voltage class or below - Google Patents
Withstand voltage test terminal structure of cross-linked cable under 110kV voltage class or below Download PDFInfo
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- CN102435923A CN102435923A CN2011103321941A CN201110332194A CN102435923A CN 102435923 A CN102435923 A CN 102435923A CN 2011103321941 A CN2011103321941 A CN 2011103321941A CN 201110332194 A CN201110332194 A CN 201110332194A CN 102435923 A CN102435923 A CN 102435923A
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Abstract
The invention relates to a withstand voltage test terminal structure of a cross-linked cable under 110kV voltage class or below. The cross-linked cable withstand voltage test terminal structure comprises a testing cable and an oil cup containing liquid. A center of the oil cup is provided with a penetrating circular hole. The testing cable goes through the circular hole. The oil cup is vertically placed. The liquid in the oil cup is a mixture of insulating oil and tap water. When the oil cup is vertically placed, a lower layer of the liquid is the tap water, an upper layer of the liquid is the insulating oil, and an upper surface of the tap water is higher than a highest point of a cable insulation shielding layer. The structure can bear an electric field formed by 200kV voltage, cost is low, operation is convenient, production efficiency is raised, the liquid in the oil cup can be used repeatedly, and frequent replacement of the liquid is not needed.
Description
Technical field
The present invention relates to a kind of crosslinked cable withstand voltage test terminal structure, particularly a kind of 110kV and following electric pressure crosslinked cable withstand voltage test terminal structure.
Background technology
35kV～110kV cable is the major product in China's power cable product, divides from structured material, and two big types of crosslinked cable and oil-filled cables are arranged basically.Because crosslinked cable has the processing of being easy to, characteristics such as easy to maintenance, crosslinked cable has replaced oil-filled cable basically at present.In order to guarantee product quality, in product standard, all there is regulation will carry out corresponding alternating voltage project and detects.For the 35kV crosslinked cable, because the restriction at terminal of being put to the test, its trial voltage can only be added to 65kV generally speaking, and according to national standard, 35kV cable voltage test and Selection adds 65kV voltage need test 30min, then tests 15min and gets final product if select to add 91kV.And present existing product is a kind of oily terminal of reversely hung Yong, and 91kV voltage can not be born in this generally speaking test terminal, so can only select to apply the test method of 65kV, test 30min, has reduced production efficiency so to a certain extent.And, to apply the AC voltage withstand test of 160kV, test 30min according to standard-required for the 110kV cable, its test terminal is to adopt the deionized water terminal at present.Though the voltage of 160kV can be born in the deionized water terminal, its shortcoming is a complex structure, costs an arm and a leg, and needs cooperate with corresponding hydrotreater when using.Parameters of temperature in the hydrotreater, flow, conductivity, one of them control is bad, all might cause the deionized water terminal to suffer punch through damage.
Summary of the invention
Technical matters to be solved by this invention provides a kind ofly can bear 200KV and following 110kV alternating voltage, more convenient, more economical and following electric pressure crosslinked cable withstand voltage test terminal structure.
For solving the problems of the technologies described above, technical scheme of the present invention is: a kind of 110kV and following electric pressure crosslinked cable withstand voltage test terminal structure, comprise test cable and lubricating cup, and fill liquid in the said lubricating cup; The bottom of said lubricating cup is provided with the circular hole that runs through, and said test cable passes said lubricating cup through said circular hole, seals between said test cable and the said lubricating cup; Said test cable comprises cable core; Said cable core skin is a cable insulation; Said cable insulation skin is the insulation shield layer, and said lubricating cup is stretched out in the upper end of said cable core, cable insulation, and the upper end of said insulation shield layer is positioned at said lubricating cup; Said lubricating cup is uprightly placed, and the liquid lower floor in the said lubricating cup is a tap water, and the upper strata is an insulating oil; Said tap water upper surface is higher than the peak of said insulation shield layer.
Preferably, said tap water upper surface is higher than the peak 2～3mm of the insulation shield layer of said test cable.
Preferably, the bottom of said lubricating cup is provided with fuel outlet, on the said fuel outlet valve is arranged.
Preferably; Said lubricating cup comprises a cylinder and a seal; Said seal comprises the annular radial flange of a sealed cylindrical and said sealed cylindrical one end face, and said cylinder is connected through flange with said annular radial flange, and said fuel outlet is located on the said sealed cylindrical.
Preferably, the material of said cylinder is a fiber glass epoxy.
Preferably, seal through heat-shrink tube between said lubricating cup and the said test cable.
Preferably, said lubricating cup is fixed on the support.
The present invention has following beneficial effect: owing to utilize water and oily cooperating dexterously, adopt vertical type, tap water is positioned at lower floor; Insulating oil is positioned at the upper strata; The tap water of lower floor has played the homogenizing effect of electric field, and the insulating oil on upper strata plays insulating effect, has effectively solved the problem that test cable root insulation shielding place electric field is concentrated; Can bear the formed electric field of 200kV voltage, be 2～3 times of the electric field ability of bearing at conventional oil terminal; Cost is low, compares with the deionized water terminal, and cost is about the latter's 1/50～1/10; In the process of the test, the time that a test terminal is installed is no more than 20min, and the potpourri of insulating oil and tap water is disposable pours into or emit, easy to operate, has improved production efficiency; The potpourri of insulating oil and tap water can repeated multiple times use, and does not need frequent change, economic environmental protection.
Description of drawings
Below in conjunction with accompanying drawing the present invention is elaborated:
Fig. 1 is 110kV of the present invention and following electric pressure crosslinked cable withstand voltage test terminal structure part sectioned view.
Fig. 2 is 110kV of the present invention and following electric pressure crosslinked cable withstand voltage test terminal structure overall schematic.
Embodiment
As shown in Figure 1,110kV of the present invention and following electric pressure crosslinked cable withstand voltage test terminal structure comprise test cable 3 and lubricating cup 1, fill liquid 2 in the said lubricating cup; The bottom of said lubricating cup 1 is provided with the circular hole 4 that runs through, and said test cable 3 passes said lubricating cup 1 through said circular hole 4, sealing between said test cable 3 and the said lubricating cup 1; Said test cable 3 comprises cable core 31; Said cable core 31 skins are cable insulation 32; Said cable insulation 32 skins are insulation shield layer 33; Said lubricating cup 1 is stretched out in the upper end of said cable core 31, cable insulation 32, and the upper end of said insulation shield layer 33 is positioned at said lubricating cup 1; Said lubricating cup 1 is uprightly placed, and liquid 2 lower floors in the said lubricating cup 1 are tap water 21, and the upper strata is an insulating oil 22; Said tap water 21 upper surfaces are higher than the peak 2～3mm of the insulation shield layer 33 of said test cable 3; The bottom of said lubricating cup 1 is provided with fuel outlet 15, on the said fuel outlet 15 valve is arranged; Said lubricating cup 1 comprises a cylinder 11 and a seal 13; Said seal 13 comprises the annular radial flange 13b of a sealed cylindrical 13a and said sealed cylindrical 13a one end face; Said cylinder 11 is connected through flange 12 with said radial flange 13b, and said fuel outlet 15 is located on the said sealed cylindrical 13a; The material of said cylinder 11 is a fiber glass epoxy; Seal through heat-shrink tube 16 between said lubricating cup 1 and the said test cable 3; Said lubricating cup 1 is fixed on the support 14.
A kind of embodiment of the present invention is following: lubricating cup 1 is upright the placement, at first the insulation shield layer 33 of test cable 3 one ends is peeled off a part, penetrates from the bottom circular aperture 4 of testing the terminal; Make the upper end of said cable core 31, cable insulation 32 stretch out said lubricating cup 1, the upper end of said insulation shield layer 33 is positioned at said lubricating cup 1, and with the heat-shrink tube that is inserted in test cable 3 in advance 16 heated sealants; Then fuel outlet 15 valves are fastened; Pour the liquid 2 for the potpourri of insulating oil and tap water into, because density, this potpourri is divided into two-layer up and down; The upper strata is an insulating oil 22, and lower floor is a tap water 21.Wherein the upper surface of tap water 21 need be higher than the peak 2～3mm of insulation shield layer 33; The tap water 21 of lower floor plays the homogenizing effect of electric field like this; The insulating oil 22 on upper strata plays insulating effect; This cooperation makes the test terminal can bear 200kV and following alternating voltage, and is unlikely to breakdown.After test is accomplished, the liquid 2 of the potpourri of insulating oil and tap water is emitted from fuel outlet 15, deposit in the bucket, so that application next time.
More than a kind of 110kV and following electric pressure crosslinked cable withstand voltage test terminal structure that the embodiment of the invention provided have been carried out detailed introduction; For one of ordinary skill in the art; According to the thought of the embodiment of the invention, the part that on embodiment and range of application, all can change, in sum; This description should not be construed as limitation of the present invention, and all any changes of making according to design philosophy of the present invention are all within protection scope of the present invention.
Claims (7)
1. a 110kV and following electric pressure crosslinked cable withstand voltage test terminal structure comprise test cable (3) and lubricating cup (1), fill liquid (2) in the said lubricating cup (1); The bottom of said lubricating cup (1) is provided with the circular hole (4) that runs through, and said test cable (3) passes said lubricating cup (1) through said circular hole (4), sealing between said test cable (3) and the said lubricating cup (1); Said test cable (3) comprises cable core (31); Said cable core (31) skin is cable insulation (32); Said cable insulation (32) skin is insulation shield layer (33); Said lubricating cup (1) is stretched out in the upper end of said cable core (31), cable insulation (32), and the upper end of said insulation shield layer (33) is positioned at said lubricating cup (1); It is characterized in that: said lubricating cup (1) is upright to be placed, and liquid (2) lower floor in the said lubricating cup (1) is tap water (21), and the upper strata is insulating oil (22); Said tap water (21) upper surface is higher than the peak of said insulation shield layer (33).
2. 110kV according to claim 1 and following electric pressure crosslinked cable withstand voltage test terminal structure, it is characterized in that: said tap water (21) upper surface is higher than the peak 2～3mm of the insulation shield layer (33) of said test cable (3).
3. 110kV according to claim 1 and following electric pressure crosslinked cable withstand voltage test terminal structure, it is characterized in that: the bottom of said lubricating cup (1) is provided with fuel outlet (15), and said fuel outlet has valve on (15).
4. 110kV according to claim 3 and following electric pressure crosslinked cable withstand voltage test terminal structure; It is characterized in that: said lubricating cup (1) comprises a cylinder (11) and a seal (13); Said seal (13) comprises the annular radial flange (13b) of a sealed cylindrical (13a) and said sealed cylindrical (13a) end face; Said cylinder (11) is connected through flange (12) with said radial flange (13b), and said fuel outlet (15) is located on the said sealed cylindrical (13a).
5. 110kV according to claim 4 and following electric pressure crosslinked cable withstand voltage test terminal structure, it is characterized in that: the material of said cylinder (11) is a fiber glass epoxy.
6. 110kV according to claim 1 and following electric pressure crosslinked cable withstand voltage test terminal structure is characterized in that: seal through heat-shrink tube (16) between said lubricating cup (1) and the said test cable (3).
7. 110kV according to claim 1 and following electric pressure crosslinked cable withstand voltage test terminal structure, it is characterized in that: said lubricating cup (1) is fixed on the support (14).
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN2011103321941A CN102435923A (en) | 2011-10-27 | 2011-10-27 | Withstand voltage test terminal structure of cross-linked cable under 110kV voltage class or below |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN2011103321941A CN102435923A (en) | 2011-10-27 | 2011-10-27 | Withstand voltage test terminal structure of cross-linked cable under 110kV voltage class or below |
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| CN102435923A true CN102435923A (en) | 2012-05-02 |
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| Application Number | Title | Priority Date | Filing Date |
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| CN2011103321941A Pending CN102435923A (en) | 2011-10-27 | 2011-10-27 | Withstand voltage test terminal structure of cross-linked cable under 110kV voltage class or below |
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Cited By (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN103336229A (en) * | 2013-06-21 | 2013-10-02 | 河南开启电力实业有限公司 | Cable pressure resistant test device and cable pressure resistant test method |
| CN103630786A (en) * | 2013-12-06 | 2014-03-12 | 江苏希波电气科技有限公司 | Dry terminal system of type test for ultrahigh-voltage cables of 500kV and below |
| CN108169622A (en) * | 2017-12-18 | 2018-06-15 | 中国电力科学研究院有限公司 | Direct current cables test terminal |
| CN112147468A (en) * | 2020-09-09 | 2020-12-29 | 中国能源建设集团华北电力试验研究院有限公司 | Three-phase system type power cable alternating current voltage withstand test method |
Citations (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US5142104A (en) * | 1990-08-07 | 1992-08-25 | James G. Biddle Co. | High voltage insulator testing system |
| JPH08179000A (en) * | 1994-12-26 | 1996-07-12 | Fujikura Ltd | Testing terminal structure for power cable |
| CN101609102A (en) * | 2009-07-13 | 2009-12-23 | 上海三原电缆附件有限公司 | Mesolow crosslinked cable industrial frequency withstand voltage, local discharge test terminal structure |
| CN202305739U (en) * | 2011-10-27 | 2012-07-04 | 广东电网公司广州供电局输电部 | Withstand voltage test terminal structure for 110kV or below voltage level crosslinking cable |
-
2011
- 2011-10-27 CN CN2011103321941A patent/CN102435923A/en active Pending
Patent Citations (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US5142104A (en) * | 1990-08-07 | 1992-08-25 | James G. Biddle Co. | High voltage insulator testing system |
| JPH08179000A (en) * | 1994-12-26 | 1996-07-12 | Fujikura Ltd | Testing terminal structure for power cable |
| CN101609102A (en) * | 2009-07-13 | 2009-12-23 | 上海三原电缆附件有限公司 | Mesolow crosslinked cable industrial frequency withstand voltage, local discharge test terminal structure |
| CN202305739U (en) * | 2011-10-27 | 2012-07-04 | 广东电网公司广州供电局输电部 | Withstand voltage test terminal structure for 110kV or below voltage level crosslinking cable |
Non-Patent Citations (1)
| Title |
|---|
| 孔德武: "交联聚乙烯电缆的试验终端", 《电线电缆》, no. 6, 30 June 1993 (1993-06-30), pages 32 - 37 * |
Cited By (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN103336229A (en) * | 2013-06-21 | 2013-10-02 | 河南开启电力实业有限公司 | Cable pressure resistant test device and cable pressure resistant test method |
| CN103336229B (en) * | 2013-06-21 | 2016-02-03 | 河南开启电力实业有限公司 | Cable voltage test unit and cable voltage test method |
| CN103630786A (en) * | 2013-12-06 | 2014-03-12 | 江苏希波电气科技有限公司 | Dry terminal system of type test for ultrahigh-voltage cables of 500kV and below |
| CN108169622A (en) * | 2017-12-18 | 2018-06-15 | 中国电力科学研究院有限公司 | Direct current cables test terminal |
| CN112147468A (en) * | 2020-09-09 | 2020-12-29 | 中国能源建设集团华北电力试验研究院有限公司 | Three-phase system type power cable alternating current voltage withstand test method |
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Application publication date: 20120502 |