CN110707650A - High-strength core rod type lightning arrester with visible fracture - Google Patents
High-strength core rod type lightning arrester with visible fracture Download PDFInfo
- Publication number
- CN110707650A CN110707650A CN201911105423.9A CN201911105423A CN110707650A CN 110707650 A CN110707650 A CN 110707650A CN 201911105423 A CN201911105423 A CN 201911105423A CN 110707650 A CN110707650 A CN 110707650A
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- lightning arrester
- fracture
- insulating support
- cable
- arrester
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- 239000004020 conductor Substances 0.000 claims description 2
- 206010017076 Fracture Diseases 0.000 description 24
- 208000010392 Bone Fractures Diseases 0.000 description 23
- 238000000034 method Methods 0.000 description 4
- 230000005540 biological transmission Effects 0.000 description 2
- 238000001514 detection method Methods 0.000 description 2
- 238000002955 isolation Methods 0.000 description 2
- 238000012423 maintenance Methods 0.000 description 2
- 238000000926 separation method Methods 0.000 description 2
- 208000002565 Open Fractures Diseases 0.000 description 1
- 238000005452 bending Methods 0.000 description 1
- 238000010276 construction Methods 0.000 description 1
- 230000007547 defect Effects 0.000 description 1
- 238000013461 design Methods 0.000 description 1
- 230000005520 electrodynamics Effects 0.000 description 1
- 230000008030 elimination Effects 0.000 description 1
- 238000003379 elimination reaction Methods 0.000 description 1
- 238000009434 installation Methods 0.000 description 1
- 239000012212 insulator Substances 0.000 description 1
- 238000012986 modification Methods 0.000 description 1
- 230000004048 modification Effects 0.000 description 1
- 238000003672 processing method Methods 0.000 description 1
- 238000013024 troubleshooting Methods 0.000 description 1
- 230000000007 visual effect Effects 0.000 description 1
Images
Classifications
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- H—ELECTRICITY
- H02—GENERATION; CONVERSION OR DISTRIBUTION OF ELECTRIC POWER
- H02G—INSTALLATION OF ELECTRIC CABLES OR LINES, OR OF COMBINED OPTICAL AND ELECTRIC CABLES OR LINES
- H02G13/00—Installations of lightning conductors; Fastening thereof to supporting structure
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- Suspension Of Electric Lines Or Cables (AREA)
Abstract
The invention discloses a high-strength core rod type lightning arrester with a visible fracture, which is characterized in that a chassis is adopted to connect the lightning arrester with an auxiliary insulating support, and then an overhead wire wiring bar and a cable wiring bar are respectively connected with two ends of the lightning arrester and the auxiliary insulating support and are used for connecting an overhead wire and an earth wire; the overhead line connecting bar is provided with a grounding pull rod for connecting a grounding wire, and the fracture disconnecting link is arranged at the connecting part of the cable connecting bar and the auxiliary insulating support and used for controlling the switching-on and switching-off of the cable connecting bar. According to the invention, the visible fracture of the device is realized through the fracture disconnecting link, so that the work of disassembling and assembling the wiring lug when the ground fault of a certain node is eliminated can be reduced, and the overhaul workload is greatly reduced; the chassis is formed by two connecting parts forming a certain included angle, so that the lightning arrester and the auxiliary insulating support form a connecting included angle, the device is compact in structure and easy to install, and the mechanical strength of the device meets the on-off operation of a regular fracture disconnecting link.
Description
Technical Field
The invention relates to a high-strength core rod type lightning arrester with a visible fracture, which is used in the field of electric power engineering.
Background
Compared with an overhead line, although the cable in-ground engineering has large investment in earlier stage and large engineering quantity, the cable in-ground engineering has attractive urban ground and high space utilization rate, and solves the problems of cable corridors and cable reliability which cannot be solved by the overhead distribution line, so that the cable in-ground engineering begins to be used in large quantity. However, as the range and number of the incoming cables are expanded, the number of failures of the incoming cables caused by the overvoltage due to lightning strike or misoperation of power is increased year by year.
In order to prevent the damage of overvoltage to the ground cable, a lightning arrester is mainly installed at the connection part of the ground cable and the overhead line. When the underground cable or the lightning arrester has single-phase earth fault, no good method and experience exist for rapidly finding the fault point, and particularly if one transmission line is provided with a plurality of sections of spanning cables or a plurality of cables, the fault point is difficult to find. This is mainly because the substation generally has a long transmission distance to the external overhead line, involving many users, many nodes are connected to the underground cable by leading from the overhead line, and the lightning arrester is connected in parallel in the middle, and if the underground cable or the lightning arrester fails, the fault trace cannot be easily found out from the appearance surface.
Taking the mode of directly connecting the underground cable and the overhead line of the 10kV distribution network system as an example, for searching the ground fault point, the conventional processing method adopts a one-by-one elimination method. When an operator of an operation group reaches a certain suspicious node, the operator firstly informs a transformer substation to switch off, then climbs a tower, removes an ampere wire clamp on an overhead line, removes connection taps at two ends of an underground cable or an arrester, enables the underground cable or the arrester to quit the operation of the system, and informs the transformer substation to switch on after the underground cable or the arrester is removed from the tower to check whether the operation of the system is normal. If the system runs normally, the underground cable or the lightning arrester which is quitted from the system running is proved to be a fault point; if the system still does not operate normally, the underground cable or the lightning arrester at the position is proved not to be a fault point, the transformer substation is informed to switch off, then the tower is climbed again, the wiring joints at two ends of the dismantled underground cable or the lightning arrester are connected again, the grounding cable and the overhead line are connected again by the universal line clamp, and the tower is evacuated to find the next node. The above process is repeated until the faulty underground cable or arrester is located. The process is complicated, the operation intensity is high, the commands of the transformer substation and the field operation need to be well coordinated, the power failure time is long, the area is wide, and the requirement of a user on quick response of a modern power grid is difficult to meet.
Disclosure of Invention
The invention aims to overcome the defects of the prior art and provides a high-strength core rod type lightning arrester with a visible fracture, which can greatly improve the efficiency of finding fault points of a distribution network with a cable entry section.
One technical scheme for achieving the above purpose is as follows: a high-strength core rod type lightning arrester with a visible fracture comprises an overhead line wiring bar, a lightning arrester, a cable wiring bar, a grounding pull rod, an underframe, an auxiliary insulating support and a fracture disconnecting link;
the overhead wire connecting bank is connected to the end part of the lightning arrester, and is provided with a connecting lug for connecting a down-leading overhead wire and a grounding pull rod for connecting a grounding wire;
the lightning arrester is connected with the auxiliary insulating support column through the bottom frame, the bottom frame is divided into a first connecting part and a second two-section part, connecting holes are formed in the first connecting part and the second connecting part respectively, the lightning arrester and the auxiliary insulating support column are inserted into the connecting holes respectively, and an included angle of 90-180 degrees is formed between the first connecting part and the second connecting part, so that a corresponding included angle is formed between the lightning arrester and the auxiliary insulating support column;
the cable connection row is connected the tip of supplementary insulating pillar, be equipped with the wiring lug that is used for connecting underground cable conductor on the cable connection row, the fracture switch set up in the cable connection row with the connecting portion of supplementary insulating pillar for the switching-on and switching-off of control cable connection row.
Preferably, an angle formed between the first connection portion and the second connection portion is 135 degrees.
Further, the lightning arrester is a core rod type lightning arrester.
Still further, the arrester is provided with an arrester disconnector.
Furthermore, the fracture between the cable terminal block and the auxiliary insulating support column is at least 200 mm.
The invention relates to a high-strength core rod type lightning arrester with a visible fracture, which adopts a bottom frame to connect the lightning arrester with an auxiliary insulating support, and then connects an overhead wire wiring bar and a cable wiring bar at two ends of the lightning arrester and the auxiliary insulating support respectively for connecting an overhead wire and an earth wire; the overhead line connecting bar is provided with a grounding pull rod for connecting a grounding wire, and the fracture disconnecting link is arranged at the connecting part of the cable connecting bar and the auxiliary insulating support and used for controlling the switching-on and switching-off of the cable connecting bar. According to the invention, the visible fracture of the device is realized through the fracture disconnecting link, so that the work of disassembling and assembling the wiring lug when the ground fault of a certain node is eliminated can be reduced, and the overhaul workload is greatly reduced; the chassis is formed by two connecting parts forming a certain included angle, so that the lightning arrester and the auxiliary insulating support form a connecting included angle, the device is compact in structure and easy to install, and the mechanical strength of the device meets the on-off operation of a regular fracture disconnecting link.
Drawings
Fig. 1 is a schematic structural view of a high-strength cored bar type arrester with visible fractures according to the present invention.
Detailed Description
In order to better understand the technical solution of the present invention, the following detailed description is made by specific examples:
referring to fig. 1, the high-strength core rod type lightning arrester with visible fracture of the present invention comprises a grounding pull rod 1, an overhead wire line bank 2, a lightning arrester 3, an underframe 4, an auxiliary insulating pillar 5, a cable line bank 6 and a fracture disconnecting link 7.
The overhead wire connecting bar 2 is connected with the end part of the lightning arrester 3, a connecting lug for connecting and leading down an overhead wire is arranged on the overhead wire connecting bar, and a grounding pull rod 1 for connecting a grounding wire is also arranged on the overhead wire connecting bar. When the overhead line is overhauled in a power failure, the grounding wire is hung in the grounding pull rod 1.
The lightning arrester 3 is one of the insulating support columns, provides mechanical support of the disconnecting link 7 for the overhead line connecting bar 2, needs to be switched on and off frequently due to the fact that the lightning arrester is provided with an isolating switch disconnecting link, and has certain requirements on mechanical strength of the lightning arrester, so that the lightning arrester 3 is a mandrel type high-strength lightning arrester. The lightning arrester 3 is a main stress bearing support for visible fracture opening and closing operation, a closing self-locking device is arranged at the top end of the lightning arrester in cooperation with the fracture disconnecting link 7, the lightning arrester bears the influence of external force such as dead weight, vibration and system electrodynamic force for a long time, and accidental opening of the fracture disconnecting link 7 caused by the external force is prevented. Meanwhile, the lightning arrester 3 has an overvoltage limiting function, is provided with a fault separation device, can be separated from the lightning arrester function in time after the lightning arrester 3 runs for a long time and has a fault short circuit, can still serve as a post insulator to provide mechanical support, and is provided with a fault separation indication to remind a line to inspect and repair in time.
The lightning arrester 3 is connected with an auxiliary insulating post 5 through a chassis 4. The chassis 4 is divided into a first connecting part and a second connecting part, connecting holes are respectively arranged on the first connecting part and the second connecting part, the lightning arrester 3 and the auxiliary insulating support 5 are respectively inserted into the connecting holes, and a 90-180-degree included angle is formed between the first connecting part and the second connecting part, so that a corresponding included angle is formed between the lightning arrester 3 and the auxiliary insulating support 5, the device is compact in structure and easy to mount in a narrow space range of the connecting part of an overhead line and a grounding line, and the mechanical strength of the device meets the requirement of frequent switching-on and switching-off operations of a fracture disconnecting link. In this embodiment, the included angle is preferably 135 °, and in actual practice, a suitable angle can be selected to facilitate field installation.
The auxiliary insulating support 5 is used as one of the insulating supports for forming the isolation switch, provides an insulating support for the cable connecting bar 6 and has strong mechanical bending resistance.
The cable wiring row 6 is connected to the end of the auxiliary insulating support column 5, and a wiring lug used for connecting underground cable wires is arranged on the cable wiring row 6.
The fracture knife switch 7 is arranged at the connecting part of the cable connecting bar 6 and the auxiliary insulating support 5 and is used for controlling the opening and closing of the cable connecting bar. When needing to be overhauled, pull open fracture switch 7 and regard as visual isolation fracture. In order to ensure the safety of the line during maintenance, the fracture disconnecting link 7 needs to ensure that the fracture is more than 200 mm. The fracture disconnecting link 7 can not be automatically switched off under the conditions of dead weight, vibration, system short circuit electric power and the like through the switching-on self-locking device.
The invention provides effective and implementable professional equipment aiming at the line short-circuit fault troubleshooting work, can reduce the work of disassembling and assembling wiring joints when the ground fault of a certain node is eliminated, greatly reduces the overhauling workload, and improves the speed of searching and diagnosing fault points and the detection reliability. Meanwhile, the line structure of the original line is not influenced, and construction and replacement are facilitated. The structural design of the invention meets the detection means of detecting the branch fault point in a live line manner, provides a new idea for different scenes of line maintenance operation on the aspect of improving the performance and the reliability of the device, and can be used as one of emergency repair switch equipment in the line.
It should be understood by those skilled in the art that the above embodiments are only for illustrating the present invention and are not to be used as a limitation of the present invention, and that changes and modifications to the above described embodiments are within the scope of the claims of the present invention as long as they are within the spirit and scope of the present invention.
Claims (5)
1. A high-strength core rod type lightning arrester with a visible fracture comprises an overhead line wiring bar, a lightning arrester and a cable wiring bar, and is characterized by further comprising a grounding pull rod, an underframe, an auxiliary insulating support and a fracture disconnecting link;
the overhead wire connecting bank is connected to the end part of the lightning arrester, and is provided with a connecting lug for connecting a down-leading overhead wire and a grounding pull rod for connecting a grounding wire;
the lightning arrester is connected with the auxiliary insulating support column through the bottom frame, the bottom frame is divided into a first connecting part and a second two-section part, connecting holes are formed in the first connecting part and the second connecting part respectively, the lightning arrester and the auxiliary insulating support column are inserted into the connecting holes respectively, and an included angle of 90-180 degrees is formed between the first connecting part and the second connecting part, so that a corresponding included angle is formed between the lightning arrester and the auxiliary insulating support column;
the cable connection row is connected the tip of supplementary insulating pillar, be equipped with the wiring lug that is used for connecting underground cable conductor on the cable connection row, the fracture switch set up in the cable connection row with the connecting portion of supplementary insulating pillar for the switching-on and switching-off of control cable connection row.
2. The high strength cored bar arrester of claim 1 wherein the angle formed between the first connecting portion and the second connecting portion is 135 degrees.
3. The high strength cored bar lightning arrester with visible fracture as claimed in claim 1, wherein the lightning arrester is a cored bar lightning arrester.
4. A high strength cored bar type arrester with visible fracture as claimed in claim 3, wherein the arrester is provided with an arrester detacher.
5. The high strength cored bar lightning arrester according to claim 1, wherein the breaking distance between the cable terminal block and the auxiliary insulating support is at least 200mm when the breaking disconnecting link is fully opened.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201911105423.9A CN110707650B (en) | 2019-11-13 | 2019-11-13 | High-strength core rod type lightning arrester with visible fracture |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201911105423.9A CN110707650B (en) | 2019-11-13 | 2019-11-13 | High-strength core rod type lightning arrester with visible fracture |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| CN110707650A true CN110707650A (en) | 2020-01-17 |
| CN110707650B CN110707650B (en) | 2024-10-22 |
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| CN201911105423.9A Active CN110707650B (en) | 2019-11-13 | 2019-11-13 | High-strength core rod type lightning arrester with visible fracture |
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Citations (7)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPS62209373A (en) * | 1986-03-10 | 1987-09-14 | Ngk Insulators Ltd | Apparatus for displaying operation and trouble of lightning insulator in thunder resistant horn insulator device |
| CN2529373Y (en) * | 2002-02-03 | 2003-01-01 | 郑春生 | Multifunction combined isolation knife switch |
| CN103972838A (en) * | 2014-05-27 | 2014-08-06 | 上海置盟电力科技有限公司 | Separable all-insulation lightning arrester for protecting cable |
| WO2015172532A1 (en) * | 2014-05-16 | 2015-11-19 | 齐进 | Compact main transformer neutral point rod gap lightning arrester and grounding whole-set protecting device |
| CN205178457U (en) * | 2015-12-17 | 2016-04-20 | 霍海波 | Transmission line arrester |
| CN207265623U (en) * | 2017-09-20 | 2018-04-20 | 广州中光电气科技有限公司 | A kind of removable arrester |
| CN210693413U (en) * | 2019-11-13 | 2020-06-05 | 国网上海市电力公司 | High-strength core rod type lightning arrester with visible fracture |
-
2019
- 2019-11-13 CN CN201911105423.9A patent/CN110707650B/en active Active
Patent Citations (7)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPS62209373A (en) * | 1986-03-10 | 1987-09-14 | Ngk Insulators Ltd | Apparatus for displaying operation and trouble of lightning insulator in thunder resistant horn insulator device |
| CN2529373Y (en) * | 2002-02-03 | 2003-01-01 | 郑春生 | Multifunction combined isolation knife switch |
| WO2015172532A1 (en) * | 2014-05-16 | 2015-11-19 | 齐进 | Compact main transformer neutral point rod gap lightning arrester and grounding whole-set protecting device |
| CN103972838A (en) * | 2014-05-27 | 2014-08-06 | 上海置盟电力科技有限公司 | Separable all-insulation lightning arrester for protecting cable |
| CN205178457U (en) * | 2015-12-17 | 2016-04-20 | 霍海波 | Transmission line arrester |
| CN207265623U (en) * | 2017-09-20 | 2018-04-20 | 广州中光电气科技有限公司 | A kind of removable arrester |
| CN210693413U (en) * | 2019-11-13 | 2020-06-05 | 国网上海市电力公司 | High-strength core rod type lightning arrester with visible fracture |
Non-Patent Citations (3)
| Title |
|---|
| 郑万杰;: "城市电网入地改造的研究", 电网技术, no. 1, 15 August 2006 (2006-08-15), pages 239 - 241 * |
| 顾焱， 等: "一种可见断口高强度避雷器隔离装置的设计与应用", 电瓷避雷器, no. 4, 31 August 2021 (2021-08-31), pages 160 - 165 * |
| 高颂九: "柱上真空断路器宜安装避雷器", 农村电气化, no. 03, 20 March 2002 (2002-03-20), pages 27 * |
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| CN110707650B (en) | 2024-10-22 |
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