CN103490284A - External column type voltage limiter for urban rail catenary - Google Patents
External column type voltage limiter for urban rail catenary Download PDFInfo
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- CN103490284A CN103490284A CN201310462210.8A CN201310462210A CN103490284A CN 103490284 A CN103490284 A CN 103490284A CN 201310462210 A CN201310462210 A CN 201310462210A CN 103490284 A CN103490284 A CN 103490284A
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- lightning arrester
- arrester body
- voltage limiter
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- post insulator
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Abstract
The invention relates to an external column type voltage limiter for an urban rail catenary. The external column type voltage limiter comprises a cross arm of a tower and further comprises a lightning arrester body and a post insulator. A spherical electrode is installed on the lightning arrester body, the lightning arrester body is connected with the post insulator through a conductive metal bar, a run-on plate is further installed between the tower cross arm and the post insulator and is in tight electric connection with the tower cross arm, the lightning arrester body is in tight electric connection with a fitting positioned on the post insulator, and an air gap is formed between the run-on plate and the spherical electrode. The external column type voltage limiter can be installed away from the insulator and provide multiple protections for the insulator and is suitable for being used on an urban rail catenary system.
Description
Technical field
The present invention relates to external pillar voltage limiter for a kind of city rail contact line.
Background technology
The urban track traffic fast development, circuit is day by day intensive, and elevated line increases gradually.Tractive power supply system is the important system in railway traffic engineering, and function is to the vehicle reliable power supply.The apparatus insulated level of tractive power supply system is very low, is difficult to resist lightning overvoltage, in the many engineerings that put into operation, more Lightning Disaster has all occurred, and causes contact line insulator or traction substation equipment to damage, even impact driving.On the urban rail transit elevated circuit, the Lightning Disaster of tractive power supply system is more, loses larger.
At present, put into operation in the rail engineering of city in the whole nation, mostly by lightning conducter is installed, reduces the lightning stroke flashover accident probability, only has in the minority track engineering and lightning arrester is installed on bracket insulator or arrester without gaps is installed in system and is reduced the lightning stroke flashover accident.Yet the bracket insulator geomery on the gauge lines of city is also inconsistent, and even some insulator shape is not conventional, and the installation limitation is very large, therefore low with the lightning arrester reliability of the supporting installation of bracket insulator, and complexity is installed, and the scope of application is little, and cost is high; Although, and arrester without gaps can be installed and used away from insulator, it easily, because bearing for a long time lasting system voltage accelerated ageing damage, causes damage in the situation that accurately do not overhaul to have an accident.
In view of the present situation of high speed development and the city rail shocking preventing technology of urban track traffic, existing domestic being sought after a kind ofly can be independent of the lightning-arrest product that the larger scope of application was installed and had to system insulation.
Summary of the invention
According to above deficiency of the prior art; the technical problem to be solved in the present invention is: provide a kind of and can overcome above-mentioned defect; can install and, for insulator provides multiple protective, be adapted at the external pillar voltage limiter used on the city rail contact net system away from insulator.
The technical solution adopted for the present invention to solve the technical problems is to provide external pillar voltage limiter for a kind of city rail contact line, the cross-arm that comprises shaft tower, also comprise lightning arrester body and post insulator, on described lightning arrester body, spheric electrode is installed, lightning arrester body is arranged and is connected by conducting metal with post insulator; Run-on tab also is installed between cross arm of tower and post insulator, and described run-on tab and cross arm of tower closely electrically connect; Lightning arrester body by conducting metal arrange with post insulator on gold utensil closely electrically connect; Form air gap between described run-on tab and spheric electrode.
Described conducting metal row, by complete copper coin bending and molding, is the integral type structure, by securing member connecting struts insulator and lightning arrester body fixing.Also fix air gap distance between the two by securing member connecting struts insulator and lightning arrester body, do not need during actual installation to regulate.Its composition material is not limited to copper, and other meets through-flow and conductor requirement of mechanical strength is all applicable.
Conducting metal row purpose is to provide effective mechanical strength and through-current capability, and, for lightning arrester body provides fixing position to meet the distance of interstitial gap, its thickness, length, bending position, bending angle equidimension parameter can change because adapting to air gap distance.
Described electrode adopts spheric electrode.Electrode can be designed to hemisphere, plate shape or clavate.
After described run-on tab is installed, its dogleg section is downward, and effectively pilot arc, away from post insulator, avoids burning out umbrella cover.
Post insulator comprises insulation mandrel, and insulation mandrel is coated with cluster parachute formula insulating coating, and the two ends of insulation mandrel are respectively arranged with gold utensil and lower gold utensil.By upper gold utensil, with lower gold utensil, with conducting metal row, with run-on tab, closely be connected respectively, the discharge voltage of middle insulation mandrel is less than the discharge voltage of insulator on shaft tower, guarantee that thunder and lightning passes through from lightning arrester body while making to be struck by lightning together with conducting metal row, run-on tab, and guarantee insulation effect at ordinary times.
The beneficial effect that the present invention has is: (1) external pillar voltage limiter volume of the present invention is little, lightweight, easy for installation, easy to maintenance; (2) the present invention is connected lightning arrester to be integrated with insulator, has reduced line cost, has simplified installation steps, has improved installation effectiveness; (3) carry out insulation coordination by a large amount of Lightning Tests, determined air gap, can guarantee that lightning discharge occurs between this air gap, during installation without being regulated again.(4) lightning arrester body is connected with copper bar with post insulator, has not only guaranteed through-flow but also can meet the requirement of mechanical strength, with bar, is connected and compares, and can prevent because crossing trembling that car causes.(5) fixing air gap is arranged between lightning arrester body and run-on tab, while being failure to actuate, in off-state, can effectively prevent that resistor disc is because continuing for a long time to bear voltage accelerated ageing damage.(6) discharge voltage of post insulator is less than the discharge voltage of line insulator in system; can guarantee during thunderbolt that lightning current passes through from lightning arrester; effectively the protection system line insulator is not destroyed; and when lightning arrester breaks down; the insulation distance of air gap and post insulator still exists, and can protect better the contact net system line insulator.
The accompanying drawing explanation
Fig. 1 is structural representation of the present invention;
Fig. 2 is post insulator structural representation of the present invention;
In figure: 1, lightning arrester body; 2, post insulator; 3, conducting metal row; 4, run-on tab; 5, cross-arm; 6, lower gold utensil; 7, insulation mandrel; 8, upper gold utensil; 9, cluster parachute formula insulating coating; 10, air gap.
Embodiment
Below in conjunction with accompanying drawing, the present invention is described further:
External pillar voltage limiter for city rail contact line as shown in Figure 1, the cross-arm 5 that comprises shaft tower, also comprise lightning arrester body 1 and post insulator 2, on described lightning arrester body 1, spheric electrode is installed, lightning arrester body 1 is arranged 3 with post insulator 2 by conducting metal and is connected; Between cross arm of tower 5 and post insulator 2, run-on tab 4 also is installed, described run-on tab 4 closely electrically connects with cross arm of tower 5; Lightning arrester body 1 is arranged 3 by conducting metal and is closely electrically connected with the upper gold utensil 6 of post insulator 2; Form air gap 10 between described run-on tab 4 and spheric electrode
Described conducting metal row 3, by complete copper coin bending and molding, is the integral type structure, by securing member connecting struts insulator 2 and lightning arrester body 1 fixing.Also fix distance between the two by securing member connecting struts insulator and lightning arrester body, do not need during actual installation to regulate.Its composition material is not limited to copper, and other meets through-flow and conductor requirement of mechanical strength is all applicable.
Conducting metal row 3 is drawing and is being the capable structure of M word, purpose is to provide effective mechanical strength and through-current capability, and provide fixing position to meet the distance of interstitial gap 10 for lightning arrester body 1, its thickness, length, bending position, bending angle equidimension parameter can change because adapting to air gap distance, but the M character form structure after its bending is constant.
Described electrode adopts spheric electrode.Electrode in the present embodiment adopts spheric electrode, and surface is round and smooth, by marking closely with other parts, realizes closely electrically connecting.Lightning arrester body 1 adopts the composite outer insulation leakage conductor as metal oxide arrester, lightweight, easy for installation.
After described run-on tab 4 is installed, its dogleg section is downward, and effectively pilot arc, away from post insulator 2, avoids burning out cluster parachute formula insulating coating 9.
When system is normally moved, air gap 10 shielding system voltages, lightning arrester body 1 bears voltage hardly, under the lightning overvoltage effect of direct lightning strike or the generation of induction thunder, lightning arrester body 1 conducting, lightning arrester body 1 presents Low ESR, the air gap that the run-on tab of lightning arrester ball electrode and insulator lower end is 4 is breakdown, lightning current arranges 3 by conducting metal, lightning arrester body 1 is delivered to spheric electrode soon, electric discharge air gap after puncturing is delivered to run-on tab 4 again, finally by iron cross arm 5 or earth connection, released into ground, thereby system line and system insulation have been protected.After lightning impulse, moment becomes large to the resistance of lightning arrester body 1 again, the electric current passed through is that arc current is suppressed in low numerical value, increase falls in the air gap arc voltage, the air gap insulation that spheric electrode and run-on tab are 4 recovers rapidly, electric arc extinguishes in the short time naturally at the utmost point, and afterflow is interdicted fully, is difficult for causing line tripping or circuit can be resumed operation by high-speed reclosure.
Lightening arrestor insulator of the present invention only illustrates some preferred embodiments in this manual, is not to its restriction.This professional and technical personnel according to the present invention inventive concept and spirit can structurally make other variation or modification; such as the profile of the shape that changes run-on tab, conducting copper, the insulating material of change post insulator etc., but these must belong to protection scope of the present invention.
The present invention starts state's inner city rail shocking preventing technology precedent, works alone, for system insulation provides multiple protective; there is volume little, lightweight, easy for installation; the advantages such as reliability is high, easy to maintenance, can effectively reduce the city rail traffic route system failure and the loss that cause because of thunderbolt.
Claims (5)
1. an external pillar voltage limiter for the city rail contact line, the cross-arm that comprises shaft tower, it is characterized in that, comprise lightning arrester body (1) and post insulator (2), the upper spheric electrode of installing of described lightning arrester body (1), lightning arrester body (1) is arranged (3) with post insulator (2) by conducting metal and is connected; Between cross arm of tower (5) and post insulator (2), run-on tab (4) also is installed, described run-on tab (4) closely electrically connects with cross arm of tower (5); Lightning arrester body (1) is arranged gold utensil (8) on (3) and post insulator by conducting metal and is closely electrically connected; Form gap between described run-on tab (4) and spheric electrode.
2. external pillar voltage limiter for city rail contact line according to claim 1, it is characterized in that, described conducting metal row (3), by complete copper coin bending and molding, is the integral type structure, by securing member connecting struts insulator and lightning arrester body fixing.
3. external pillar voltage limiter for city rail contact line according to claim 1, is characterized in that, described electrode (6) adopts spheric electrode.
4. external pillar voltage limiter for city rail contact line according to claim 1 is characterized in that: after described run-on tab (4) is installed, its dogleg section is downward.
5. external pillar voltage limiter for city rail contact line according to claim 1, it is characterized in that, described post insulator (2) comprises insulation mandrel (7), insulation mandrel (7) is coated with cluster parachute formula insulating coating (9), and the two ends of insulation mandrel are respectively arranged with gold utensil (8) and lower gold utensil (6).
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201310462210.8A CN103490284A (en) | 2013-09-30 | 2013-09-30 | External column type voltage limiter for urban rail catenary |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201310462210.8A CN103490284A (en) | 2013-09-30 | 2013-09-30 | External column type voltage limiter for urban rail catenary |
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| Publication Number | Publication Date |
|---|---|
| CN103490284A true CN103490284A (en) | 2014-01-01 |
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| Application Number | Title | Priority Date | Filing Date |
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| CN201310462210.8A Pending CN103490284A (en) | 2013-09-30 | 2013-09-30 | External column type voltage limiter for urban rail catenary |
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Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN104201568A (en) * | 2014-09-04 | 2014-12-10 | 国家电网公司 | Fixed gap overvoltage protector |
| CN109243738A (en) * | 2018-08-24 | 2019-01-18 | 国网山东省电力公司青州市供电公司 | A kind of Zinc-Oxide Arrester installation pedestal |
| CN113507089A (en) * | 2021-04-28 | 2021-10-15 | 国网福建省电力有限公司 | Electrified easy-to-dismount-and-mount lightning arrester based on spring self-locking structure and working principle of electrified easy-to-dismount-and-mount lightning arrester |
Citations (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JP2005302584A (en) * | 2004-04-14 | 2005-10-27 | Asahi Electric Works Ltd | Thunder resistant horn having air gap adjusting arrangement |
| CN2847475Y (en) * | 2005-09-02 | 2006-12-13 | 中国电力科学研究院 | Metal oxide lightning arrester with external series gap for protective insulation conductor |
| CN101471554A (en) * | 2007-12-30 | 2009-07-01 | 山东迅实电气有限公司 | Overvoltage protector for open-resistant lever for avoiding wire from breaking due to lightning stroke |
| CN101699573A (en) * | 2009-10-24 | 2010-04-28 | 山东迅实电气有限公司 | Lightning arrester insulator for overhead wire insulated conductor |
-
2013
- 2013-09-30 CN CN201310462210.8A patent/CN103490284A/en active Pending
Patent Citations (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JP2005302584A (en) * | 2004-04-14 | 2005-10-27 | Asahi Electric Works Ltd | Thunder resistant horn having air gap adjusting arrangement |
| CN2847475Y (en) * | 2005-09-02 | 2006-12-13 | 中国电力科学研究院 | Metal oxide lightning arrester with external series gap for protective insulation conductor |
| CN101471554A (en) * | 2007-12-30 | 2009-07-01 | 山东迅实电气有限公司 | Overvoltage protector for open-resistant lever for avoiding wire from breaking due to lightning stroke |
| CN101699573A (en) * | 2009-10-24 | 2010-04-28 | 山东迅实电气有限公司 | Lightning arrester insulator for overhead wire insulated conductor |
Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN104201568A (en) * | 2014-09-04 | 2014-12-10 | 国家电网公司 | Fixed gap overvoltage protector |
| CN109243738A (en) * | 2018-08-24 | 2019-01-18 | 国网山东省电力公司青州市供电公司 | A kind of Zinc-Oxide Arrester installation pedestal |
| CN113507089A (en) * | 2021-04-28 | 2021-10-15 | 国网福建省电力有限公司 | Electrified easy-to-dismount-and-mount lightning arrester based on spring self-locking structure and working principle of electrified easy-to-dismount-and-mount lightning arrester |
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Application publication date: 20140101 |