CN112180226A - A appurtenance for arrester high-voltage testing - Google Patents
A appurtenance for arrester high-voltage testing Download PDFInfo
- Publication number
- CN112180226A CN112180226A CN202011013316.6A CN202011013316A CN112180226A CN 112180226 A CN112180226 A CN 112180226A CN 202011013316 A CN202011013316 A CN 202011013316A CN 112180226 A CN112180226 A CN 112180226A
- Authority
- CN
- China
- Prior art keywords
- insulating
- lightning arrester
- auxiliary tool
- voltage test
- insulating sleeve
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- 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
- G01R31/16—Construction of testing vessels; Electrodes therefor
-
- 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
- G01R1/04—Housings; Supporting members; Arrangements of terminals
- G01R1/0408—Test fixtures or contact fields; Connectors or connecting adaptors; Test clips; Test sockets
- G01R1/0416—Connectors, terminals
Abstract
The invention provides an auxiliary tool for a high-voltage test of a lightning arrester, which comprises an insulating sleeve, an insulating rod and a locker, wherein the insulating sleeve is arranged on the insulating rod; the insulation support is characterized in that the insulation support is detachably connected with the insulation rod, the insulation support is provided with an opening end and a closed end, the locker is arranged on the inner wall of the insulation support and close to the opening end of the insulation support, the locker is composed of four bow spring pressing sheets, and two ends of the bow spring pressing sheets are fixedly connected with the inner wall of the insulation support respectively. The invention provides an auxiliary tool for a high-voltage test of a lightning arrester, which can tightly clamp a discharge electrode through four bow-shaped spring pressing sheets of a locker, thereby ensuring that an insulating sleeve is firmly arranged on the discharge electrode and solving the problem that the conventional auxiliary tool for the high-voltage test is easy to fall off under the influence of external force.
Description
Technical Field
The invention relates to the field of auxiliary tools for high-voltage tests, in particular to an auxiliary tool for a high-voltage test of a lightning arrester.
Background
A transformer neutral point arrester is an overvoltage protection device of a transformer, and can introduce overvoltage (including internal overvoltage and external overvoltage) occurring in a power system to the ground through a discharge gap. Therefore, the operation condition of the neutral point arrester has important significance for the stable operation of the power system, and whether the arrester has potential safety hazards such as internal moisture and insulation degradation needs to be checked through a high-voltage direct-current leakage current test. In a high-voltage direct-current leakage current test, auxiliary tools (such as an insulating baffle, an insulating glove and the like) capable of improving the insulating strength are often required to be additionally arranged in a discharge gap of the lightning arrester, so that the discharge gap is not subjected to breakdown discharge in advance in the voltage applying process.
At present, most of high-voltage test auxiliary tools for solving the problem of advanced breakdown of a discharge gap in a direct-current leakage current test are combination of an insulating sleeve and an insulating rod, the insulating sleeve is placed at one end of the discharge gap by the insulating rod, and the discharge gap is guaranteed not to be subjected to advanced breakdown discharge in the test process. However, the insulating sleeve of the high-voltage test auxiliary tool has a larger diameter than the discharge electrode, and is easily detached by an external force (wind, etc.).
In the prior art, as in a Chinese patent granted by No. 7.06/21 in 2019, an auxiliary wiring tool of a test wire clamp, which is published under the reference CN209016278U, is clamped and connected to a high-voltage test wiring part through a pair of leaf-shaped spring pieces symmetrically arranged at two sides of the inner side of the wiring clamp, but the anti-falling effect is not good enough.
Disclosure of Invention
The invention provides an auxiliary tool for a high-voltage test of a lightning arrester, aiming at overcoming the technical defect that the conventional auxiliary tool for the high-voltage test is easy to fall off under the influence of an external force.
In order to solve the technical problems, the technical scheme of the invention is as follows:
an auxiliary tool for a high-voltage test of a lightning arrester comprises an insulating sleeve, an insulating rod and a locker; the insulation support is characterized in that the insulation support is detachably connected with the insulation rod, the insulation support is provided with an opening end and a closed end, the locker is arranged on the inner wall of the insulation support and close to the opening end of the insulation support, the locker is composed of four bow spring pressing sheets, and two ends of the bow spring pressing sheets are fixedly connected with the inner wall of the insulation support respectively.
In the scheme, the discharge electrode can be tightly clamped by the four bow-shaped spring pressing sheets of the locker, so that the insulating sleeve is firmly arranged on the discharge electrode, and the insulating sleeve is prevented from falling off due to the influence of external force such as wind.
Preferably, the radial distance between the bow spring pressing sheets is smaller than the diameter of the discharge electrode of the lightning arrester.
Preferably, the included angle between the straight line of the two ends of the bow spring pressing sheet and the straight line of the top point of the bow spring pressing sheet and any end point thereof is between 20 and 30 degrees.
Preferably, the closed end of the insulating sleeve is provided with a first insulating layer, and the first insulating layer is of a solid structure.
Preferably, the thickness of the first insulating layer is 25 mm.
Preferably, the inner surface of the insulating sleeve is provided with a second insulating layer, and two ends of the bow spring pressing sheet are respectively and fixedly connected with the inner wall of the second insulating layer.
Preferably, the thickness of the second insulating layer is 10 mm.
Preferably, the voltage-sharing structure further comprises a voltage-sharing ring, and the voltage-sharing ring is fixedly arranged on one side of the first insulating layer.
Preferably, still include the clamp, the clamp cramps the middle part of insulating sleeve, the clamp with the connection can be dismantled to the insulator spindle.
Preferably, one side that the clamp is not laminated with the insulating sleeve is provided with the mounting hole of taking the internal thread, the one end of insulator spindle be provided with the corresponding external screw thread of internal thread of mounting hole, the mounting hole with insulator spindle threaded connection.
Compared with the prior art, the technical scheme of the invention has the beneficial effects that:
the invention provides an auxiliary tool for a high-voltage test of a lightning arrester, which can tightly clamp a discharge electrode through four bow-shaped spring pressing sheets of a locker, thereby ensuring that an insulating sleeve is firmly arranged on the discharge electrode and preventing the insulating sleeve from falling off due to the influence of external force such as wind and the like.
Drawings
Fig. 1 is a sectional view of an auxiliary tool for high voltage testing of a surge arrester according to the present invention;
FIG. 2 is a schematic view of the arrangement of the locking device of the present invention;
wherein: 1. an insulating sleeve; 11. a first insulating layer; 12. a second insulating layer; 13. a grading ring; 2. an insulating rod; 3. a locker; 31. a bow spring tablet; 4. clamping a hoop; 41. and (7) installing holes.
Detailed Description
The drawings are for illustrative purposes only and are not to be construed as limiting the patent;
for the purpose of better illustrating the embodiments, certain features of the drawings may be omitted, enlarged or reduced, and do not represent the size of an actual product;
it will be understood by those skilled in the art that certain well-known structures in the drawings and descriptions thereof may be omitted.
The technical solution of the present invention is further described below with reference to the accompanying drawings and examples.
Example 1
As shown in fig. 1-2, an auxiliary tool for high-voltage testing of a lightning arrester comprises an insulating sleeve 1, an insulating rod 2 and a locker 3; insulating sleeve 1 with the connection can be dismantled to insulator spindle 2, insulating sleeve 1 is provided with open end and blind end, locker 3 sets up insulating sleeve 1's inner wall and being close to insulating sleeve 1's open end, locker 3 comprises four bow-shaped spring preforming 31, bow-shaped spring preforming 31's both ends respectively with insulating sleeve 1's inner wall fixed connection.
In the specific implementation process, when the insulating sleeve 1 needs to be installed on the discharge electrode of the lightning arrester, a worker firstly connects the insulating sleeve 1 with the insulating rod 2, then installs the insulating sleeve 1 on the discharge electrode of the lightning arrester by using the insulating rod 2, and clamps the discharge electrode together through the four bow-shaped spring pressing sheets 31 of the locker 3, so that the insulating sleeve 1 is firmly installed on the discharge electrode, and the insulating sleeve 1 is prevented from falling off due to the influence of external force such as wind; after the insulating sleeve 1 is installed, workers can detach the insulating rod 2 from the insulating sleeve 1, so that the influence on the accuracy of a test result due to leakage current is avoided; when needing to take off insulating sleeve 1 from the discharge electrode, the staff is connected insulator spindle 2 and insulating sleeve 1 earlier, because four bow-shaped spring preforming 31 of locker 3 press from both sides tight discharge electrode jointly, consequently can ensure that insulator spindle 2 can be connected with insulating sleeve 1, then utilize insulator spindle 2 to take off insulating sleeve 1 from the discharge electrode, and is simple and convenient. The two ends of the bow spring pressing sheet 31 are fixed on the inner wall of the insulating sleeve 1 by means of bolts, bonding and the like.
More specifically, the radial distance between the bow spring blades 31 is smaller than the diameter of the discharge electrode of the arrester.
In the specific implementation process, the radial distance between every two opposite bow spring pressing sheets 31 is slightly smaller than the diameter of the discharge electrode of the lightning arrester, so that the discharge electrode is clamped.
More specifically, the included angle between the straight line of the two ends of the bow spring pressing piece 31 and the straight line of the top point of the bow spring pressing piece 31 and any end point thereof is between 20 ° and 30 °.
In the specific implementation process, the included angle of 20-30 degrees can ensure that the resistance in the process of installing the insulating sleeve 1 on the discharge electrode is smaller, so that the installation is more convenient.
More specifically, the closed end of the insulating sleeve 1 is provided with a first insulating layer 11, and the first insulating layer 11 is a solid structure.
In the specific implementation process, the first insulating layer 11 with a solid structure can effectively improve the insulating level of the insulating sleeve 1, and the problem that the insulating level is reduced due to the fact that gaps exist in filling is solved.
More specifically, the thickness of the first insulating layer 11 is 25 mm.
In the specific implementation process, the first insulating layer 11 is a solid cylinder structure, the radius of the first insulating layer is equal to the inner radius of the insulating sleeve 1, the thickness of the first insulating layer is 25mm, and the height of the insulating sleeve 1 is 200 mm.
More specifically, the inner surface of the insulating sleeve 1 is provided with a second insulating layer 12, and two ends of the bow spring pressing piece 31 are respectively fixedly connected with the inner wall of the second insulating layer 12.
In the specific implementation process, the second insulating layer 12 is arranged to improve the insulating level of the insulating sleeve 1, improve the electric field distribution of the discharge gap and prevent the electric field distortion.
More specifically, the thickness of the second insulating layer 12 is 10 mm.
In the specific implementation process, the outer radius of the insulating sleeve 1 is 35mm, and the inner radius is 30 mm; the thickness of the second insulating layer 12 was 10mm and the radius of the central hollow portion was 20 mm.
More specifically, the voltage-sharing structure further comprises a voltage-sharing ring 13, and the voltage-sharing ring 13 is fixedly arranged on one side of the first insulating layer 11.
In the specific implementation process, the grading ring 13 is arranged to ensure that the electric field at the tip of the discharge gap of the lightning arrester is uniform in the boosting process. The grading ring 13 is fixedly bonded to one side of the first insulating layer 11 through insulating glue.
More specifically, still include clamp 4, clamp 4 cramps the middle part of insulating sleeve 1, clamp 4 with insulator spindle 2 can dismantle the connection.
More specifically, one side of the clamp 4, which is not attached to the insulating sleeve 1, is provided with a mounting hole 41 with internal threads, one end of the insulating rod 2 is provided with external threads corresponding to the internal threads of the mounting hole 41, and the mounting hole 41 is in threaded connection with the insulating rod 2.
In the specific implementation process, the insulation sleeve 1 and the insulation rod 2 are detachably connected through the threaded connection of the installation hole 41 and the insulation rod 2.
It should be understood that the above-described embodiments of the present invention are merely examples for clearly illustrating the present invention, and are not intended to limit the embodiments of the present invention. Other variations and modifications will be apparent to persons skilled in the art in light of the above description. And are neither required nor exhaustive of all embodiments. Any modification, equivalent replacement, and improvement made within the spirit and principle of the present invention should be included in the protection scope of the claims of the present invention.
Claims (10)
1. An auxiliary tool for a high-voltage test of a lightning arrester is characterized by comprising an insulating sleeve, an insulating rod and a locker; the insulation support is characterized in that the insulation support is detachably connected with the insulation rod, the insulation support is provided with an opening end and a closed end, the locker is arranged on the inner wall of the insulation support and close to the opening end of the insulation support, the locker is composed of four bow spring pressing sheets, and two ends of the bow spring pressing sheets are fixedly connected with the inner wall of the insulation support respectively.
2. The auxiliary tool for high voltage test of lightning arrester according to claim 1, wherein the radial distance between the bow spring pressing sheets is smaller than the diameter of the discharge electrode of the lightning arrester.
3. The auxiliary tool for the high voltage test of the lightning arrester as claimed in claim 1, wherein the included angle between the straight line of the two ends of the bow spring pressing piece and the straight line of the vertex of the bow spring pressing piece and any end point is between 20 ° and 30 °.
4. The auxiliary tool for high voltage test of the lightning arrester according to claim 1, characterized in that the closed end of the insulating sleeve is provided with a first insulating layer, and the first insulating layer is of a solid structure.
5. An auxiliary tool for high voltage testing of lightning arrester according to claim 4, characterized in that the thickness of the first insulating layer is 25 mm.
6. The auxiliary tool for the high voltage test of the lightning arrester according to claim 1, wherein the inner surface of the insulating sleeve is provided with a second insulating layer, and two ends of the bow spring pressing sheet are fixedly connected with the inner wall of the second insulating layer respectively.
7. The auxiliary tool for high voltage test of lightning arrester according to claim 6, characterized in that the thickness of the second insulating layer is 10 mm.
8. The auxiliary tool for the high voltage test of the lightning arrester according to claim 4, further comprising a grading ring, wherein the grading ring is fixedly arranged on one side of the first insulating layer.
9. The auxiliary tool for the high-voltage test of the lightning arrester according to claim 1, further comprising a clamp, wherein the clamp is tightly clamped at the middle part of the insulating sleeve, and the clamp is detachably connected with the insulating rod.
10. The auxiliary tool for the high voltage test of the lightning arrester according to claim 9, wherein a side of the clamp not attached to the insulating sleeve is provided with a mounting hole with internal threads, one end of the insulating rod is provided with external threads corresponding to the internal threads of the mounting hole, and the mounting hole is in threaded connection with the insulating rod.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202011013316.6A CN112180226A (en) | 2020-09-24 | 2020-09-24 | A appurtenance for arrester high-voltage testing |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202011013316.6A CN112180226A (en) | 2020-09-24 | 2020-09-24 | A appurtenance for arrester high-voltage testing |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN112180226A true CN112180226A (en) | 2021-01-05 |
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Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN202011013316.6A Pending CN112180226A (en) | 2020-09-24 | 2020-09-24 | A appurtenance for arrester high-voltage testing |
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| Country | Link |
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| CN (1) | CN112180226A (en) |
Citations (10)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPS61271471A (en) * | 1985-05-27 | 1986-12-01 | Ngk Insulators Ltd | Automatic tester for zinc oxide lightning arrestor |
| CN2264905Y (en) * | 1996-06-05 | 1997-10-15 | 北京轴承研究所 | Thermocouple probe |
| CN107226391A (en) * | 2015-05-29 | 2017-10-03 | 何烷钰 | A kind of method for preventing that textile tubes from coming off |
| CN108538524A (en) * | 2018-04-18 | 2018-09-14 | 广东电网有限责任公司 | A kind of transformer neutral point test of lightning arrester electrode insulation |
| CN208172141U (en) * | 2018-05-21 | 2018-11-30 | 广东电网有限责任公司 | A kind of transformer neutral point arrester DC leakage test auxiliary tool |
| CN109406901A (en) * | 2018-11-22 | 2019-03-01 | 云南电网有限责任公司西双版纳供电局 | A kind of electric power arrester high-tension measurement experimental test wiring new equipment and its application |
| CN109633384A (en) * | 2018-11-29 | 2019-04-16 | 湖南长高思瑞自动化有限公司 | A kind of Intelligent insulating line thunder protection on-Line Monitor Device and method |
| CN209016278U (en) * | 2018-12-26 | 2019-06-21 | 国网福建省电力有限公司宁德供电公司 | Testing wire clamp auxiliary connection tool |
| CN209199693U (en) * | 2018-11-27 | 2019-08-02 | 广西电网有限责任公司桂林供电局 | A kind of test of lightning arrester protective device |
| CN211062883U (en) * | 2020-01-19 | 2020-07-21 | 内蒙古电力（集团）有限责任公司乌兰察布电业局 | Capacitor discharging device |
-
2020
- 2020-09-24 CN CN202011013316.6A patent/CN112180226A/en active Pending
Patent Citations (10)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPS61271471A (en) * | 1985-05-27 | 1986-12-01 | Ngk Insulators Ltd | Automatic tester for zinc oxide lightning arrestor |
| CN2264905Y (en) * | 1996-06-05 | 1997-10-15 | 北京轴承研究所 | Thermocouple probe |
| CN107226391A (en) * | 2015-05-29 | 2017-10-03 | 何烷钰 | A kind of method for preventing that textile tubes from coming off |
| CN108538524A (en) * | 2018-04-18 | 2018-09-14 | 广东电网有限责任公司 | A kind of transformer neutral point test of lightning arrester electrode insulation |
| CN208172141U (en) * | 2018-05-21 | 2018-11-30 | 广东电网有限责任公司 | A kind of transformer neutral point arrester DC leakage test auxiliary tool |
| CN109406901A (en) * | 2018-11-22 | 2019-03-01 | 云南电网有限责任公司西双版纳供电局 | A kind of electric power arrester high-tension measurement experimental test wiring new equipment and its application |
| CN209199693U (en) * | 2018-11-27 | 2019-08-02 | 广西电网有限责任公司桂林供电局 | A kind of test of lightning arrester protective device |
| CN109633384A (en) * | 2018-11-29 | 2019-04-16 | 湖南长高思瑞自动化有限公司 | A kind of Intelligent insulating line thunder protection on-Line Monitor Device and method |
| CN209016278U (en) * | 2018-12-26 | 2019-06-21 | 国网福建省电力有限公司宁德供电公司 | Testing wire clamp auxiliary connection tool |
| CN211062883U (en) * | 2020-01-19 | 2020-07-21 | 内蒙古电力（集团）有限责任公司乌兰察布电业局 | Capacitor discharging device |
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Application publication date: 20210105 |
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| RJ01 | Rejection of invention patent application after publication |