CN108008510A - A kind of zinc oxide pressure limiting device - Google Patents
A kind of zinc oxide pressure limiting device Download PDFInfo
- Publication number
- CN108008510A CN108008510A CN201711450739.2A CN201711450739A CN108008510A CN 108008510 A CN108008510 A CN 108008510A CN 201711450739 A CN201711450739 A CN 201711450739A CN 108008510 A CN108008510 A CN 108008510A
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- China
- Prior art keywords
- limiting device
- pressure limiting
- pressure
- device body
- gold utensil
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Classifications
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- G—PHYSICS
- G02—OPTICS
- G02B—OPTICAL ELEMENTS, SYSTEMS OR APPARATUS
- G02B6/00—Light guides; Structural details of arrangements comprising light guides and other optical elements, e.g. couplings
- G02B6/44—Mechanical structures for providing tensile strength and external protection for fibres, e.g. optical transmission cables
- G02B6/4401—Optical cables
- G02B6/4415—Cables for special applications
- G02B6/4416—Heterogeneous cables
- G02B6/4417—High voltage aspects, e.g. in cladding
- G02B6/4419—Preventing corona discharge
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- Physics & Mathematics (AREA)
- General Physics & Mathematics (AREA)
- Optics & Photonics (AREA)
- Thermistors And Varistors (AREA)
Abstract
The present invention relates to a kind of zinc oxide pressure limiting device, including pressure limiting device body, gold utensil is provided with one end of pressure limiting device body, the outer end of upper gold utensil is matched somebody with somebody in fact is provided with pressure cable lid, corresponding arc pressure cable groove is respectively arranged with the mutual cooperation face of upper gold utensil and pressure cable lid, the accommodating chamber for placing OPGW optical cable downleads is formed between arc pressure cable groove, composite insulator is arranged with the middle part of pressure limiting device body, another end set of pressure limiting device body has lower gold utensil, the upper and lower part of pressure limiting device body is symmetrically arranged the curved bar structural member of L-type, Zinc-Oxide Arrester is provided between curved bar structural member；The present invention had both possessed the effect that traditional drop wire clip fixes optical cable, and fixed effect is more solid and reliable, enough safe distances can be provided again, the induced voltage peak value on OPGW optical cable downleads can also be limited, improve OPGW optical cables and draw lower margin of safety, avoid OPGW optical cables from drawing the lower phenomenon for discharge end stock occur to occur, strong guarantee communication security and normal operation.
Description
Technical field
The present invention relates to power equipment safety ancillary technique field, more particularly to a kind of zinc oxide pressure limiting device.
Background technology
OPGW optical cables have one section of vertical downlead after substation's gantry framework, are provided according to associate power code：" draw
Preferably use matched holding clamp to add electro-insulating rubber to be fixed between framework in lower optical cable and station, should not with shaft tower frame member spacing
Less than 20mm." (communication of power system optical cable mounting process specification；Q/GDW 758-2012).Add the holding clamp of electro-insulating rubber
Fixation is provided for OPGW optical cable downleads, the pitch requirements of 20mm are that occur induced overvoltage on downlead in order to prevent
When, downlead discharges truss bar, optical cable of burning.
By investigation, electro-insulating rubber long-time is found under substation's high ozone environment, easy aging, fracture, cause
OPGW optical cable downleads loosen.When running into strong wind atmosphere, OPGW optical cable downleads are subject to thrust, it is most likely that " patch " is in framework
On shaft tower, or with framework shaft tower apart from close.It is this both without fixed insulation spacing, be also referred to as without the situation of reliable ground
For " weak isolating ".When lightning surge, Frequency Transient Overvoltage and switching overvoltage occurs in system, make OPGW optical cable downleads
On there is induced overvoltage, it is most likely that puncture this " weak isolating ", occur OPGW optical cables draw it is lower to framework shaft tower electric discharge feelings
Condition.Operation of power networks department of China also once repeatedly found that the OPGW optical cables that enter the station put substation's portal frame in 500kV substations
Electricity and cause stranded failure, only just there occurs 8 similar accidents in administrative regional 3 years of Zhejiang Province's grid company.Serious threat
To the communication security and normal operation of network systems at different levels.
Based on this, it is necessary to which one kind can draw the reliable insulation distance of lower offer for OPGW optical cables but also limit OPGW optical cables
The zinc oxide pressure limiting device that induced voltage peak value, raising OPGW optical cables on downlead draw lower margin of safety is devised.
The content of the invention
The purpose of the invention is to overcome the deficiencies in the prior art, obtain one kind can be OPGW optical cables lower offer be provided can
The insulation distance that leans on and the induced voltage peak value on OPGW optical cable downleads can be limited, OPGW optical cables is improved and draws lower margin of safety
Zinc oxide pressure limiting device.
The present invention is to be achieved through the following technical solutions：
A kind of zinc oxide pressure limiting device, including pressure limiting device body, are set on an end of the pressure limiting device body
There is upper gold utensil, in fact with pressure cable lid is provided with, the pressure cable lid is detachably secured to by fastening bolt for the outer end of the upper gold utensil
Corresponding arc pressure cable groove is respectively arranged with the mutual cooperation face of the outer end of upper gold utensil, the upper gold utensil and pressure cable lid, it is described
The accommodating chamber for placing OPGW optical cable downleads is formed between arc pressure cable groove, is arranged with the middle part of the pressure limiting device body compound exhausted
Edge, another end set of the pressure limiting device body have lower gold utensil, the upper and lower part point of the pressure limiting device body
The curved bar structural member of L-type is not symmetrically arranged with, is provided with Zinc-Oxide Arrester between the curved bar structural member and is passed through zinc oxide
Arrester is connected forms shunt circuit with pressure limiting device body.
Preferably, the composite insulator structure is highly 185mm, it is made of plug and vulcanization full skirt, the full skirt
Creepage distance 370mm, much larger than the setting of 20mm safe distances, when lightning surge, Frequency Transient Overvoltage occurs in system
During with switching overvoltage, make induced overvoltage occur on OPGW optical cable downleads, and the setting of composite insulator structure height is filled
Divide the safe distance that ensure that OPGW optical cables downlead and framework shaft tower.
Preferably, the upper gold utensil and pressure cable lid are formed using aluminium alloy compression casting, there is outstanding environment weather resistance,
The situation that loosening occur in OPGW optical cable downleads is avoided to occur.
Compared with prior art, the beneficial effects of the invention are as follows：The present invention had both possessed traditional drop wire clip and has fixed optical cable
Effect, and fixed effect is more solid and reliable, and can provide enough safe distances, moreover it is possible to limits on OPGW optical cable downleads
Induced voltage peak value, improve OPGW optical cables draw lower margin of safety, avoid OPGW optical cables draw it is lower there is discharge end stock phenomenon hair
It is raw, strong guarantee communication security and normal operation.
Brief description of the drawings
Fig. 1 is the structure diagram of the present invention；
Fig. 2 is the using state structure diagram of the present invention.
The reference numerals are as follows：
1st, lower gold utensil, 2, composite insulator, 3, upper gold utensil, 4, curved bar structural member, 5, Zinc-Oxide Arrester, 6, OPGW optical cables
Downlead, 7, pressure cable lid, 8, electric power Special hoop, 9, framework shaft tower.
Embodiment
In order to make the purpose , technical scheme and advantage of the present invention be clearer, with reference to the accompanying drawings and embodiments, it is right
The present invention is further elaborated.It should be appreciated that the specific embodiments described herein are merely illustrative of the present invention, and
It is not used in the restriction present invention.
Referring to Fig. 1, a kind of zinc oxide pressure limiting device, including pressure limiting device body, one of the pressure limiting device body
Gold utensil 3 is provided with end, the outer end of the upper gold utensil 3 is in fact with pressure cable lid 7 is provided with, and the pressure cable lid 7 is by fastening spiral shell
Bolt is detachably secured to the outer end of gold utensil 3, and correspondence is respectively arranged with the mutual cooperation face of the upper gold utensil 3 and pressure cable lid 7
Arc pressure cable groove, form the accommodating chamber for placing OPGW optical cables downlead 6, the pressure limiting device sheet between arc pressure cable groove
Composite insulator 2 is arranged with the middle part of body, another end set of the pressure limiting device body has lower gold utensil 1, the pressure limiting dress
The upper and lower part for putting body is symmetrically arranged the curved bar structural member 4 of L-type, is set between the curved bar structural member 4 aerobic
Change zinc arrester 5 and shunt circuit is formed with pressure limiting device body by the connection of Zinc-Oxide Arrester 5.
In the above-mentioned technical solutions, Zinc-Oxide Arrester 5 has good nonlinear wind vibration, makes in normal working voltage
When flow through arrester electric current it is minimum (microampere or milliampere level), equivalent to insulator；When system, lightning surge, power frequency occur temporary
When state overvoltage and switching overvoltage, there is induced overvoltage on OPGW optical cables downlead 6, make the resistance of Zinc-Oxide Arrester 5
Drastically decline, the energy for overvoltage of releasing, reach induced voltage effect on limitation OPGW optical cables downlead 6, so as to prevent OPGW
Optical cable downlead 6 occurs because of the situation that overvoltage discharges framework shaft tower 9.
When it is implemented, 2 structure height of composite insulator is 185mm, it is made of plug and vulcanization full skirt, the umbrella
Skirt creepage distance 370mm, much larger than the setting of 20mm safe distances, when system, lightning surge, power frequency transient state occur excessively electric
Pressure and during switching overvoltage, make occur induced overvoltage on OPGW optical cables downlead 6, and 2 structure height of composite insulator is set
Surely the safe distance of OPGW optical cables downlead 6 and framework shaft tower 9 has been fully ensured that.
When it is implemented, the upper gold utensil 3 and pressure cable lid 7 are formed using aluminium alloy compression casting, it is weather-proof with outstanding environment
Performance, avoids the situation that loosening occurs in OPGW optical cables downlead 6 from occurring.
The present apparatus is when in use：
As shown in Fig. 2, OPGW optical cables downlead 6, by pressing cable lid 7 to be fixed on upper gold utensil 3, lower gold utensil 1 is special by electric power
It is connected with anchor ear 8 with framework shaft tower 9, OPGW optical cables downlead 6 and upper gold utensil 3, curved bar structural member, Zinc-Oxide Arrester 5, lower gold
Tool 1, electric power Special hoop 8 and framework shaft tower 9 and the earth, form a circuit.
When lightning surge, Frequency Transient Overvoltage and switching overvoltage occurs in system, go out on OPGW optical cables downlead 6
Existing induced overvoltage, makes the resistance of Zinc-Oxide Arrester 5 drastically decline, by above-mentioned circuit release overvoltage energy to greatly
Ground, reaches induced voltage effect on limitation OPGW optical cables downlead 6, so as to prevent OPGW optical cables downlead 6 because overvoltage is to structure
The situation that hack lever tower 9 discharges occurs.
During system normal operation, the induced voltage very little on OPGW optical cables downlead 6, passes through the electricity of Zinc-Oxide Arrester 5
Minimum (microampere or milliampere level), equivalent to insulator, above-mentioned circuit is the equal of open circuit.So during system normal operation, OPGW
Optical cable downlead 6 is to maintain state of insulation with framework shaft tower 9.
The foregoing is merely illustrative of the preferred embodiments of the present invention, is not intended to limit the invention, all essences in the present invention
All any modification, equivalent and improvement made within refreshing and principle etc., should all be included in the protection scope of the present invention.
Claims (3)
- A kind of 1. zinc oxide pressure limiting device, it is characterised in that including pressure limiting device body, an end of the pressure limiting device body Gold utensil (3) is provided with portion, in fact with pressure cable lid (7) is provided with, the pressure cable lid (7) passes through for the outer end of the upper gold utensil (3) Fastening bolt is detachably secured to the outer end of gold utensil (3), on the mutual cooperation face of the upper gold utensil (3) and pressure cable lid (7) point Corresponding arc pressure cable groove is not provided with, and the accommodating chamber for placing OPGW optical cables downlead (6) is formed between the arc pressure cable groove, Composite insulator (2) is arranged with the middle part of the pressure limiting device body, under another end set of the pressure limiting device body has Gold utensil (1), the upper and lower part of the pressure limiting device body are symmetrically arranged the curved bar structural member (4) of L-type, the curved bar Zinc-Oxide Arrester (5) is provided between structural member (4) and is connected by Zinc-Oxide Arrester (5) and is formed with pressure limiting device body Shunt circuit.
- A kind of 2. zinc oxide pressure limiting device according to claim 1, it is characterised in that：Composite insulator (2) structure Highly it is 185mm, is made of plug and vulcanization full skirt, the full skirt creepage distance 370mm.
- A kind of 3. zinc oxide pressure limiting device according to claim 1, it is characterised in that：The upper gold utensil (3) and pressure cable lid (7) formed using aluminium alloy compression casting.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201711450739.2A CN108008510A (en) | 2017-12-27 | 2017-12-27 | A kind of zinc oxide pressure limiting device |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201711450739.2A CN108008510A (en) | 2017-12-27 | 2017-12-27 | A kind of zinc oxide pressure limiting device |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN108008510A true CN108008510A (en) | 2018-05-08 |
Family
ID=62061959
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201711450739.2A Pending CN108008510A (en) | 2017-12-27 | 2017-12-27 | A kind of zinc oxide pressure limiting device |
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| Country | Link |
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| CN (1) | CN108008510A (en) |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN108963949A (en) * | 2018-09-03 | 2018-12-07 | 合肥海畅电气技术有限公司 | A kind of large capacity pressure limiting device with heat resistance |
Citations (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN102033279A (en) * | 2010-12-20 | 2011-04-27 | 江东金具设备有限公司 | Optical fiber composite aerial earth wire (OPGW) energy-saving joint box |
| CN202905310U (en) * | 2012-11-16 | 2013-04-24 | 胜利油田邦源电气有限责任公司 | Composite insulator overvoltage integration protector |
| CN203786357U (en) * | 2014-04-04 | 2014-08-20 | 国家电网公司 | Transformer station optical cable terminal leading-down fastening device |
| CN106981346A (en) * | 2017-04-14 | 2017-07-25 | 山东莱芜电瓷有限公司 | A kind of fixed interval (FI) Zinc-Oxide Arrester |
| CN206431336U (en) * | 2017-02-09 | 2017-08-22 | 新能量科技股份有限公司 | A kind of remaining cable case of transformer station's insulation landing |
-
2017
- 2017-12-27 CN CN201711450739.2A patent/CN108008510A/en active Pending
Patent Citations (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN102033279A (en) * | 2010-12-20 | 2011-04-27 | 江东金具设备有限公司 | Optical fiber composite aerial earth wire (OPGW) energy-saving joint box |
| CN202905310U (en) * | 2012-11-16 | 2013-04-24 | 胜利油田邦源电气有限责任公司 | Composite insulator overvoltage integration protector |
| CN203786357U (en) * | 2014-04-04 | 2014-08-20 | 国家电网公司 | Transformer station optical cable terminal leading-down fastening device |
| CN206431336U (en) * | 2017-02-09 | 2017-08-22 | 新能量科技股份有限公司 | A kind of remaining cable case of transformer station's insulation landing |
| CN106981346A (en) * | 2017-04-14 | 2017-07-25 | 山东莱芜电瓷有限公司 | A kind of fixed interval (FI) Zinc-Oxide Arrester |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN108963949A (en) * | 2018-09-03 | 2018-12-07 | 合肥海畅电气技术有限公司 | A kind of large capacity pressure limiting device with heat resistance |
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