CN107328966B - Power cable insulation test sleeve and use method - Google Patents
Power cable insulation test sleeve and use method Download PDFInfo
- Publication number
- CN107328966B CN107328966B CN201710432515.2A CN201710432515A CN107328966B CN 107328966 B CN107328966 B CN 107328966B CN 201710432515 A CN201710432515 A CN 201710432515A CN 107328966 B CN107328966 B CN 107328966B
- Authority
- CN
- China
- Prior art keywords
- sleeve
- cable
- insulation
- cushion block
- fastening bolt
- 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
- 238000009413 insulation Methods 0.000 title claims abstract description 54
- 238000000034 method Methods 0.000 title claims abstract description 9
- 239000011810 insulating material Substances 0.000 claims description 3
- 125000006850 spacer group Chemical group 0.000 claims 1
- 230000016507 interphase Effects 0.000 abstract description 4
- 230000004888 barrier function Effects 0.000 abstract description 3
- 230000009286 beneficial effect Effects 0.000 description 1
- 230000007547 defect Effects 0.000 description 1
- 230000000694 effects Effects 0.000 description 1
Classifications
-
- G—PHYSICS
- G01—MEASURING; TESTING
- G01R—MEASURING ELECTRIC VARIABLES; MEASURING MAGNETIC VARIABLES
- G01R1/00—Details of instruments or arrangements of the types included in groups G01R5/00 - G01R13/00 and G01R31/00
- G01R1/02—General constructional details
- G01R1/18—Screening arrangements against electric or magnetic fields, e.g. against earth's field
-
- G—PHYSICS
- G01—MEASURING; TESTING
- G01R—MEASURING ELECTRIC VARIABLES; MEASURING MAGNETIC VARIABLES
- G01R31/00—Arrangements for testing electric properties; Arrangements for locating electric faults; Arrangements for electrical testing characterised by what is being tested not provided for elsewhere
- G01R31/08—Locating faults in cables, transmission lines, or networks
- G01R31/081—Locating faults in cables, transmission lines, or networks according to type of conductors
- G01R31/083—Locating faults in cables, transmission lines, or networks according to type of conductors in cables, e.g. underground
-
- G—PHYSICS
- G01—MEASURING; TESTING
- G01R—MEASURING ELECTRIC VARIABLES; MEASURING MAGNETIC VARIABLES
- G01R31/00—Arrangements for testing electric properties; Arrangements for locating electric faults; Arrangements for electrical testing characterised by what is being tested not provided for elsewhere
- G01R31/12—Testing dielectric strength or breakdown voltage ; Testing or monitoring effectiveness or level of insulation, e.g. of a cable or of an apparatus, for example using partial discharge measurements; Electrostatic testing
- G01R31/1227—Testing dielectric strength or breakdown voltage ; Testing or monitoring effectiveness or level of insulation, e.g. of a cable or of an apparatus, for example using partial discharge measurements; Electrostatic testing of components, parts or materials
- G01R31/1263—Testing dielectric strength or breakdown voltage ; Testing or monitoring effectiveness or level of insulation, e.g. of a cable or of an apparatus, for example using partial discharge measurements; Electrostatic testing of components, parts or materials of solid or fluid materials, e.g. insulation films, bulk material; of semiconductors or LV electronic components or parts; of cable, line or wire insulation
- G01R31/1272—Testing dielectric strength or breakdown voltage ; Testing or monitoring effectiveness or level of insulation, e.g. of a cable or of an apparatus, for example using partial discharge measurements; Electrostatic testing of components, parts or materials of solid or fluid materials, e.g. insulation films, bulk material; of semiconductors or LV electronic components or parts; of cable, line or wire insulation of cable, line or wire insulation, e.g. using partial discharge measurements
Abstract
The invention relates to a power cable insulation test sleeve and a use method thereof, wherein the power cable insulation test sleeve comprises an insulation sleeve, a fastening bolt and a cushion block, wherein the cushion block is arranged in the insulation sleeve, the fastening bolt is in threaded connection with the insulation sleeve, the bottom of the cushion block is matched with the inner wall of the insulation sleeve, and the top of the cushion block is provided with a groove matched with the outer wall of a cable for accommodating the cable; the fastening bolt comprises a handle, a limiting raised head and a screw rod, one end of the screw rod is fixedly connected with the limiting raised head, the other end of the screw rod is fixedly connected with the handle, the screw rod is in threaded connection with an insulating sleeve, and the limiting raised head corresponds to a groove of the cushion block and is used for fixing a cable. The advantages are that: the power cable insulation test sleeve can effectively shield stray current by applying the principle of 'interelectrode barrier' under the condition of insufficient insulation distance, increase insulation strength of cable interphase, opposite ground and lead connection, reduce influence of stray current on test results during test, and ensure accuracy of cable test data.
Description
Technical Field
The invention belongs to the field of power cable electrical tests, and particularly relates to a power cable insulation test sleeve and a use method thereof.
Background
When insulation resistance and direct current withstand voltage tests of a three-phase power cable (35 kV and below) are carried out, test results are affected by stray current to the ground due to insufficient insulation distance between phases or relative to the ground, misjudgment is easy to occur, and meanwhile, the joint of a high-voltage lead and the cable is exposed, so that site unsafe factors exist.
In the prior published technical data, the patent application number is relatively similar to that: 201120257686.4 the utility model discloses a cable termination gum insulation test sleeve is not used for insulation resistance and direct current withstand voltage test, and technical scheme is to the cable that is tested installs the joint additional, and there is not fastener, and the junction is liable to contact poorly, has unsafe factors such as suddenly landing, gap discharge in the pressurization process, and practical application effect is not good.
Disclosure of Invention
In order to overcome the defects of the prior art, the invention aims to provide the power cable insulation test sleeve, which effectively increases the insulation strength of the cable interphase, the opposite ground and the lead connection part under the condition of insufficient insulation distance, reduces the influence of stray current on test results and ensures the accuracy of electric test conclusion and the on-site personal safety.
In order to achieve the above purpose, the present invention is realized by the following technical scheme:
the power cable insulation test sleeve comprises an insulation sleeve, a fastening bolt and a cushion block, wherein the cushion block is arranged in the insulation sleeve, the fastening bolt is in threaded connection with the insulation sleeve, the bottom of the cushion block is matched with the inner wall of the insulation sleeve, and a groove matched with the outer wall of a cable is formed in the top of the cushion block and used for accommodating the cable; the fastening bolt comprises a handle, a limiting raised head and a screw rod, one end of the screw rod is fixedly connected with the limiting raised head, the other end of the screw rod is fixedly connected with the handle, the screw rod is in threaded connection with an insulating sleeve, and the limiting raised head corresponds to a groove of the cushion block and is used for fixing a cable.
The insulating sleeve, the handle of the fastening bolt and the screw are made of MPP insulating materials, and the limiting raised head and the cushion block are made of insulating rubber.
The upper part of the limiting raised head is matched with the inner wall of the insulating sleeve.
The cushion block and the insulating sleeve are of an integrated structure.
The application method of the power cable insulation test sleeve comprises the steps of screwing a fastening bolt, enabling a limiting protruding head to be arranged at the top of the inner wall of an insulation sleeve, sleeving the insulation sleeve on a tested cable connector, screwing the fastening bolt, enabling the limiting protruding head to abut against a cable, and fixing the cable through grooves of the limiting protruding head and a cushion block.
Compared with the prior art, the invention has the beneficial effects that:
the power cable insulation test sleeve can effectively shield stray current by applying the principle of 'interelectrode barrier' under the condition of insufficient insulation distance, increase insulation strength of cable interphase, opposite ground and lead connection, reduce influence of stray current on test results during test, and ensure accuracy of cable test data. The cable is clamped and fixed by the fastening bolts and the cushion blocks, so that the test sleeve is fixed on the outer wall of the cable, the cable is suitable for cables with different diameters, and the safety and reliability of the cable in the test process are ensured.
Drawings
Fig. 1 is a front view of a power cable insulation test sleeve.
Fig. 2 is a side view of a power cable insulation test sleeve.
Fig. 3 is a schematic structural view of the fastening bolt.
Fig. 4 is a schematic structural view of a pad.
In the figure: 1-a cable 2-an insulating sleeve 3-a fastening bolt 4-a cushion block 5-a handle 6-a screw 7-a limiting raised head 8-a groove.
Detailed Description
The present invention will be described in detail below with reference to the drawings of the specification, but it should be noted that the practice of the present invention is not limited to the following embodiments.
1-4, the power cable insulation test sleeve comprises an insulation sleeve 2, a fastening bolt 3 and a cushion block 4, wherein the cushion block 4 is arranged in the insulation sleeve 2, and the fastening bolt 3 is in threaded connection with the insulation sleeve 2; the bottom of the cushion block 4 is matched with the inner wall of the insulating sleeve 2, and the cushion block and the insulating sleeve are fixedly connected; the top of the cushion block 4 is provided with a groove 8 matched with the outer wall of the cable 1 for accommodating the cable 1; the fastening bolt 3 comprises a handle 5, a limiting raised head 7 and a screw rod 6, wherein one end of the screw rod 6 is fixedly connected with the limiting raised head 7, the other end of the screw rod 6 is fixedly connected with the handle 5, the screw rod 6 is in threaded connection with the insulating sleeve 2, and the limiting raised head 7 corresponds to a groove 8 of the cushion block 4 and is used for fixing the cable 1. The cushion block 4 and the insulating sleeve 2 are of an integrated structure.
See fig. 1 and 2, wherein the insulating sleeve 2, the handle 5 of the fastening bolt 3 and the screw 6 are made of MPP insulating materials, and the limiting raised head 7 and the cushion block 4 are made of insulating rubber, so that the cable 1 with different diameters can be adapted. Referring to fig. 3, the upper part of the limit projection 7 is matched with the inner wall of the insulating sleeve 2.
Before use, the edge burrs, the inner wall smoothness and the connecting parts of the power cable insulation test sleeve are polished, fastened and attached to meet the electrical test conditions and the field use environment.
Referring to fig. 1, the method for using the power cable insulation test sleeve comprises the steps of screwing the fixing bolt 3, enabling the limiting protruding head 7 to be arranged on the top of the inner wall of the insulation sleeve 2, sleeving the insulation sleeve 2 on the joint of the tested cable 1, screwing the fixing bolt 3, enabling the limiting protruding head 7 to abut against the cable 1, and fixing the cable 1 through the limiting protruding head 7 and the groove 8 of the cushion block 4.
The invention can effectively shield stray current by applying the principle of 'interelectrode barrier' under the condition of insufficient insulation distance, increase the insulation strength of the cable 1 at the interphase, opposite and lead connection positions, reduce the influence of stray current on test results in test and ensure the personal safety of the site and the accuracy of the test conclusion of the cable 1. The cable 1 is clamped and fixed by the fastening bolt 3 and the cushion block 4, so that the test sleeve is fixed on the outer wall of the cable 1, and the insulativity of the cable 1 is ensured.
Claims (3)
1. The power cable insulation test sleeve is characterized by comprising an insulation sleeve, a fastening bolt and a cushion block, wherein the cushion block is arranged in the insulation sleeve, the fastening bolt is in threaded connection with the insulation sleeve, the bottom of the cushion block is matched with the inner wall of the insulation sleeve, and a groove matched with the outer wall of the cable is formed in the top of the cushion block and used for accommodating the cable; the fastening bolt comprises a handle, a limiting raised head and a screw rod, one end of the screw rod is fixedly connected with the limiting raised head, the other end of the screw rod is fixedly connected with the handle, the screw rod is in threaded connection with the insulating sleeve, and the limiting raised head corresponds to the groove of the cushion block and is used for fixing the cable; the insulating sleeve, the handle of the fastening bolt and the screw are made of MPP insulating materials, and the limiting raised head and the cushion block are made of insulating rubber;
the use method of the power cable insulation test sleeve comprises the steps of screwing the fastening bolt, enabling the limiting protruding head to be arranged at the top of the inner wall of the insulation sleeve, sleeving the insulation sleeve on a tested cable, screwing the fastening bolt, enabling the limiting protruding head to abut against the cable, and fixing the cable through the limiting protruding head and the grooves of the cushion blocks.
2. The power cable insulation test sleeve according to claim 1, wherein the upper portion of the limiting boss is matched with the inner wall of the insulation sleeve.
3. The power cable insulation test sleeve according to claim 1, wherein the spacer and the insulation sleeve are of an integral structure.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201710432515.2A CN107328966B (en) | 2017-06-09 | 2017-06-09 | Power cable insulation test sleeve and use method |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201710432515.2A CN107328966B (en) | 2017-06-09 | 2017-06-09 | Power cable insulation test sleeve and use method |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| CN107328966A CN107328966A (en) | 2017-11-07 |
| CN107328966B true CN107328966B (en) | 2024-02-13 |
Family
ID=60194717
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201710432515.2A Active CN107328966B (en) | 2017-06-09 | 2017-06-09 | Power cable insulation test sleeve and use method |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN107328966B (en) |
Families Citing this family (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN107843749A (en) * | 2017-12-11 | 2018-03-27 | 冯志仑 | Insulation protection device |
| CN112490992B (en) * | 2020-11-20 | 2022-02-18 | 国网江苏省电力有限公司苏州供电分公司 | Insulating sleeve head |
| CN113917195B (en) * | 2021-09-13 | 2022-11-11 | 华中科技大学 | Cable insulation diagnostic device anchor clamps of anti-electromagnetic interference |
Citations (7)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPH08122401A (en) * | 1994-10-26 | 1996-05-17 | Showa Electric Wire & Cable Co Ltd | Withstand voltage test method for long distance power cable line |
| 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 |
| CN101923140A (en) * | 2010-09-07 | 2010-12-22 | 北京必成达电缆附件有限公司 | Withstand test device of sleeve of looped network cabinet equipment |
| CN202695024U (en) * | 2012-06-08 | 2013-01-23 | 侯圣春 | Insulating protecting cover for conductor joint |
| CN204538613U (en) * | 2015-05-06 | 2015-08-05 | 林名楠 | A kind of ultra-high-tension power transmission line transposition insulator reinforcing device |
| CN206148624U (en) * | 2016-11-11 | 2017-05-03 | 国网四川省电力公司凉山供电公司 | A cable insulation dop for electric power overhauls |
| CN206773028U (en) * | 2017-06-09 | 2017-12-19 | 国网辽宁省电力有限公司朝阳供电公司 | A kind of power cable insulation tests sleeve |
-
2017
- 2017-06-09 CN CN201710432515.2A patent/CN107328966B/en active Active
Patent Citations (7)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPH08122401A (en) * | 1994-10-26 | 1996-05-17 | Showa Electric Wire & Cable Co Ltd | Withstand voltage test method for long distance power cable line |
| 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 |
| CN101923140A (en) * | 2010-09-07 | 2010-12-22 | 北京必成达电缆附件有限公司 | Withstand test device of sleeve of looped network cabinet equipment |
| CN202695024U (en) * | 2012-06-08 | 2013-01-23 | 侯圣春 | Insulating protecting cover for conductor joint |
| CN204538613U (en) * | 2015-05-06 | 2015-08-05 | 林名楠 | A kind of ultra-high-tension power transmission line transposition insulator reinforcing device |
| CN206148624U (en) * | 2016-11-11 | 2017-05-03 | 国网四川省电力公司凉山供电公司 | A cable insulation dop for electric power overhauls |
| CN206773028U (en) * | 2017-06-09 | 2017-12-19 | 国网辽宁省电力有限公司朝阳供电公司 | A kind of power cable insulation tests sleeve |
Also Published As
| Publication number | Publication date |
|---|---|
| CN107328966A (en) | 2017-11-07 |
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