CN101699573A - Lightning arrester insulator for overhead wire insulated conductor - Google Patents

Lightning arrester insulator for overhead wire insulated conductor Download PDF

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Publication number
CN101699573A
CN101699573A CN200910208693A CN200910208693A CN101699573A CN 101699573 A CN101699573 A CN 101699573A CN 200910208693 A CN200910208693 A CN 200910208693A CN 200910208693 A CN200910208693 A CN 200910208693A CN 101699573 A CN101699573 A CN 101699573A
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CN
China
Prior art keywords
lightning arrester
insulator
insulated conductor
electrode
post insulator
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.)
Pending
Application number
CN200910208693A
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Chinese (zh)
Inventor
尹彬
Current Assignee (The listed assignees may be inaccurate. Google has not performed a legal analysis and makes no representation or warranty as to the accuracy of the list.)
SHANDONG XUNSHI ELECTRIC CO Ltd
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SHANDONG XUNSHI ELECTRIC CO Ltd
Priority date (The priority date 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 date listed.)
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Application filed by SHANDONG XUNSHI ELECTRIC CO Ltd filed Critical SHANDONG XUNSHI ELECTRIC CO Ltd
Priority to CN200910208693A priority Critical patent/CN101699573A/en
Publication of CN101699573A publication Critical patent/CN101699573A/en
Pending legal-status Critical Current

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Abstract

The invention discloses a lightning arrester insulator for an overhead wire insulated conductor, which comprises a pillar insulator and a lightning arrester. The insulated conductor is erected on the pillar insulator, the pillar insulator is fixed on a tower cross arm, and the lightning arrester and the pillar insulator are connected through a lightning arrester connecting bar assembly; an arc-striking electrode is arranged between the cross arm and the pillar insulator, and the arc-striking electrode is tightly and electrically connected with the tower cross arm; the lightning arrester consists of a lightning arrester body and an electrode connected at the head of the lightning arrester body, and the electrode and the lightning arrester body are tightly and electrically connected with hardware on the pillar insulator through the lightning arrester connecting bar assembly; and air clearance is formed between the arc-striking electrode and the electrode. The lightning arrester insulator for the overhead wire insulated conductor has the advantages of small volume, light weight, convenient assembly, high reliability and convenient maintenance, and can effectively prevent the lightning strike breakdown damage of the overhead wire insulated conductor.

Description

Lightning arrester insulator for overhead wire insulated conductor
Technical field
The present invention relates to the electric power system overhead distribution, relate in particular to a kind of lightning arrester insulator for overhead wire insulated conductor,, can prevent effectively that insulated conductor from damaging because of Lightning Over-voltage at power distribution network 10-35kV system suspended insulated guide wire lightning-caused breaking problem.
Background technology
In power distribution network, adopt insulated conductor to solve corridor that plain conductor can't resolve and safety problem, compare with cable, adopt the insulated conductor reduced investment, build soon, advantage is fairly obvious.Developed countries has gradually adopted suspended insulated guide wire from the later stage sixties 20th century.But insulated conductor also has the weakness of himself, i.e. lightning-caused breaking problem, and so-called thunderbolt must be broken.Therefore, must properly settle the lightning-caused breaking problem.
According to the mechanism of insulated conductor lightning-caused breaking, the corresponding precautionary measures have " dredge and stop up " dual mode." dredging " is exactly with near the local bare wireization of the insulated conductor the insulator, make power frequency arc arc root shift or be fixed on the special gold utensil and burn, thereby guardwire avoids burn.For example, peel off at insulator and wire coupling place insulating barrier, adopt arc protection molded lines folder or the insulated conductor of insulator both sides peeled off one section insulating barrier and installed the preventing arc wire clamp additional.Simple to operate, the small investment of the mode of " dredging formula ", but lead is local exposed, has sealing and insulation defect." obstruction " is exactly to stop the power frequency continued flow starting the arc behind the lightning stroke flashover.For example, adopt the current-limiting arc-extinguishing angle, i.e. the ring-like external series gap metal oxide arrester of band series connection.Compare " dredging formula ", the mode better protecting effect of " blocking type ", shortcoming are the construction relative complex, and cost is higher.
China implements insulating since the eighties to the built on stilts net of city power distribution and transforms pilot, has accelerated paces the nineties.In recent years, along with the increase of insulated conductor area coverage in the power distribution network, the lightning-caused breaking problem is also day by day obviously got up.China is late to the starting of insulated conductor lightning-caused breaking Study on Problems, also is in the stage of fumbling at present.
Summary of the invention
Technical problem to be solved by this invention is: above-mentioned " blocking type " principle of a kind of employing is provided and overcomes the prior art defective, be adapted at the novel lightening arrestor insulator that uses on the 10-35kV suspended insulated guide wire, volume is little, and is in light weight, easy for installation, reliability is high, easy to maintenance.
The technical solution adopted in the present invention is: a kind of lightning arrester insulator for overhead wire insulated conductor, comprise post insulator 1 and lightning arrester 2, insulated conductor is erected on the post insulator 1, post insulator 1 is fixed on the shaft tower cross-arm 5, it is characterized in that described lightning arrester 2 and post insulator 1 connect as one by lightning arrester pitman assembly 3; Between cross-arm 5 and post insulator 1 arc electrode 6 is installed also, described arc electrode 6 closely electrically connects with shaft tower cross-arm 5; Described lightning arrester 2 is formed by lightning arrester body 13 with at the electrode 14 that its head connects, and electrode 14 and lightning arrester body 13 closely electrically connect by gold utensil 7 on lightning arrester pitman assembly 3 and the post insulator; Form air gap 4 between described arc electrode 6 and the electrode 14.
Wherein preferred version is:
Described lightning arrester pitman assembly 3 is made up of lightning arrester pitman overcoat 15 and lightning arrester pitman 16, and lightning arrester pitman 16 two ends are provided with screw thread;
Described lightning arrester pitman assembly 3 can be drawn by the upper end or the lower end of post insulator 1, makes post insulator 1 and lightning arrester 2 form parallel-connection structures, by the fixing distance of 1 of lightning arrester and post insulator of lightning arrester pitman assembly 3, need not regulate during installation;
Described lightning arrester pitman assembly 3 external packets are covered with anti-corrosion material;
Described arc electrode 6 can be spherical or tabular;
Described arc electrode 6 is connected as a single entity by metal processing, welding or bolt fixed mode with post insulator 1, need not regulate during installation;
The diameter of mandrel scope of described post insulator 1 is between the 15-50 millimeter;
The type of described post insulator 1 is pin insulator or rod insulator;
Described arc electrode 6 and electrode 14 constitutes the outer air gap 4 of connect, and the distance of this air gap determines by a large amount of tests, and discharges when guaranteeing overvoltage and occur between this gap, guarantees that simultaneously this gap can bear system's power-frequency withstand voltage.
The present invention has filled up the domestic technique blank, owing to adopted above-mentioned technical scheme, have following advantage: (1) lightning arrester insulation sub-volumes of the present invention is little, in light weight, easy for installation, easy to maintenance; (2) the present invention is connected lightning arrester and is 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 thunder and lightning tests, determined gap width, can guarantee that lightning discharge occurs between this air gap, need not during installation to regulate again.
Description of drawings
Fig. 1 is a mounting structure schematic diagram of the present invention;
Fig. 2 is the structural representation of post insulator of the present invention;
Fig. 3 is the structural representation of lightning arrester of the present invention;
Fig. 4 is the structural representation of lightning arrester pitman assembly of the present invention;
Fig. 5 is the structural representation of arc electrode embodiment of the present invention;
Among the figure: gold utensil 10 bullet pads 11 nuts 12 double-screw bolts 13 lightning arrester bodies 14 electrodes 15 lightning arrester pitman overcoats 16 lightning arrester pitmans 17 boss under gold utensil 8 post insulator overcoats 9 post insulators on 5 cross-arms, 6 arc electrodes, 7 post insulators of 1 post insulator, 2 lightning arresters, 3 lightning arrester pitman assemblies, 4 air gaps
Embodiment
Specifically describe the specific embodiment of the present invention below with reference to accompanying drawing.
As shown in Figure 1, lightning arrester insulator for overhead wire insulated conductor of the present invention comprises the air gap 4 between the electrode 14 of lightning arrester pitman assembly 3, arc electrode 6, arc electrode 6 and lightning arrester 2 of post insulator 1, lightning arrester 2, connecting struts insulator 1 and lightning arrester 2; Post insulator 1 is fixed on the shaft tower cross-arm 5, and insulated conductor is erected on the last gold utensil of post insulator 1.
Post insulator 1 is connected as a single entity by lightning arrester pitman assembly 3 with lightning arrester 2, and lightning arrester pitman assembly 3 is used for fixing the distance of 1 of lightning arrester 2 and post insulator, need not regulate during installation.
Lightning arrester pitman assembly 3 can be drawn by the upper end or the lower end of post insulator 1, makes post insulator 1 and lightning arrester 2 form parallel-connection structure; Lightning arrester pitman assembly 3 outsides can be anticorrosion by coating anti-corrosion material.But lightning arrester pitman assembly 3 outside coated insulation materials also can be without insulating material, but must satisfy etch-proof requirement.
Horizontal cantilever shape lightning arrester pitman assembly 3 and post insulator 1, lightning arrester 2 are by being threaded, installation, easy to maintenance, lightning arrester 2 and post insulator 1 vertically are arranged in juxtaposition, the distance in the horizontal air gap 4 that electrode 14 and arc electrode 6 form is through determining after the repetition test, guaranteed that the thunder and lightning puncture all occurs on this gap, need not during installation to regulate.
Arc electrode 6 is installed between cross-arm 5 and the post insulator 1, and post insulator 1 is fixedlyed connected by double-screw bolt 12, nut 11, bullet pad 10 with cross-arm 5, thereby realizes that arc electrode 6 is electrically connected with the tight of shaft tower cross-arm 5.
The type of insulator can be selected pin insulator or rod insulator etc., and used diameter of mandrel scope scalable according to the requirement difference of bending strength, can be selected between the 15-50 millimeter.The post insulator 1 of present embodiment is made up of gold utensil 9 under gold utensil on the post insulator 7, post insulator overcoat 8, the post insulator as shown in Figure 2; Insulated conductor is erected in the groove of gold utensil 7 on the post insulator, concrete installation method is installed according to 10kV insulator neck hypodesmus or 10kV insulator top hypodesmus, set bolt 12 on the gold utensil 9 under the post insulator, and be furnished with bullet pad 10, nut 11, realization is fastenedly connected with shaft tower cross-arm 5.
As shown in Figure 3, lightning arrester 2 is made up of lightning arrester body 13 and electrode 14, and electrode 14 can be designed to hemisphere, plate shape or clavate.Electrode 14 in the present embodiment adopts the bulb electrode, and the surface is slick and sly, realizes closely electrically connecting by tight fixed bolt and lightning arrester body 13.Lightning arrester body 13 adopts compound external insulation leakage conductor such as metal oxide arrester, and is in light weight, easy for installation.
As shown in Figure 4, lightning arrester pitman assembly 3 is made up of the lightning arrester pitman overcoat 15 and the lightning arrester pitman 16 of insulation.Lightning arrester pitman 16 two ends are equipped with screw thread, and an end is connected to lightning arrester 2, and the other end is connected to gold utensil 7 on the post insulator, by nut screwing clamping, make that gold utensil 7 closely is electrically connected on boss 17 and the post insulator on the lightning arrester pitman 16.
Arc electrode 6 can be done globulate or tabular, and is connected as a single entity by other modes such as metal processing, welding or bolt with post insulator 1, need not regulate during installation.
In the structural representation of a kind of as shown in Figure 5 arc electrode embodiment: arc electrode 6 is tabular, have circular hole on one side, be inserted in double-screw bolt 12 during installation, adopt nut 11 fastening can linking together with 1 time gold utensil of post insulator, and closely the electrically connecting of realization and shaft tower cross-arm 5; The downward bending of another side had both helped the assurance of clearance distance, simultaneously in servicely was difficult for accumulating dirt, avoided causing flashover.
As another kind of embodiment, arc electrode 6 can be done globulate, and is connected as a single entity by metal processing or welding manner with the following gold utensil of post insulator 1, need not regulate during installation.
Arc electrode 6 and electrode 14 constitutes the outer air gap 4 of connect, and the distance of this air gap determines by a large amount of tests, and discharges when guaranteeing overvoltage and occur between this gap, guarantees that simultaneously this gap can bear system's power-frequency withstand voltage.
Operation principle of the present invention and process: when normally moving in system; the air gap isolates power-frequency voltage; lightning arrester body bears voltage hardly; under the lightning overvoltage effect of direct lightning strike or the generation of induction thunder; the lightning arrester body conducting; lightning arrester body presents Low ESR; air gap between the arc electrode of lightning arrester ball electrode and insulator lower end is breakdown; lightning current is by gold utensil on the post insulator 7; lightning arrester pitman 16; lightning arrester body 13 is delivered to electrode 14 soon; discharge air gap 4 after puncturing is delivered to arc electrode 6 again; released into ground by iron cross arm 5 or earth connection at last, thereby protected insulated circuit.After the lightning impulse, moment becomes big to the resistance of lightning arrester body again, the electric current that passes through is that arc current is suppressed in low numerical value, increase falls in the air gap arc voltage, air gap insulation between ball electrode and arc electrode recovers rapidly, electric arc extinguishes in the short time naturally at the utmost point, and power frequency continued flow 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; for example change the insulating material of the profile of the shape of arc electrode or lightning arrester electrode or size, change lightning arrester pitman assembly or size, change post insulator or size etc., but these must belong to protection scope of the present invention.

Claims (8)

1. lightning arrester insulator for overhead wire insulated conductor, comprise post insulator (1) and lightning arrester (2), insulated conductor is erected on the post insulator (1), post insulator (1) is fixed on the shaft tower cross-arm (5), it is characterized in that described lightning arrester (2) and post insulator (1) connect as one by lightning arrester pitman assembly (3); Between cross-arm (5) and post insulator (1) arc electrode (6) is installed also, described arc electrode (6) closely electrically connects with shaft tower cross-arm (5); Described lightning arrester (2) is formed by lightning arrester body (13) with at the electrode (14) that its head connects, electrode (14) and lightning arrester body (13) closely electrically connect by gold utensil (7) on lightning arrester pitman assembly (3) and the post insulator, form air gap (4) between described arc electrode (6) and the electrode (14).
2. lightning arrester insulator for overhead wire insulated conductor according to claim 1, it is characterized in that: described lightning arrester pitman assembly (3) can be drawn by the upper end or the lower end of post insulator (1), make post insulator (1) and lightning arrester (2) form parallel-connection structure, by the fixing distance between lightning arrester and post insulator (1) of lightning arrester pitman assembly (3), need not regulate during installation.
3. lightning arrester insulator for overhead wire insulated conductor according to claim 1 is characterized in that: described lightning arrester pitman assembly (3) external packets is covered with anti-corrosion material.
4. lightning arrester insulator for overhead wire insulated conductor according to claim 1 is characterized in that: described arc electrode (6) can be spherical or tabular.
5. lightning arrester insulator for overhead wire insulated conductor according to claim 1 is characterized in that: described arc electrode (6) is connected as a single entity by metal processing, welding or bolt fixed mode with post insulator (1), need not regulate during installation.
6. lightning arrester insulator for overhead wire insulated conductor according to claim 1 is characterized in that: the diameter of mandrel scope of described post insulator (1) is between the 15-50 millimeter.
7. lightning arrester insulator for overhead wire insulated conductor according to claim 1 is characterized in that: the type of described post insulator (1) is pin insulator or rod insulator.
8. lightning arrester insulator for overhead wire insulated conductor according to claim 1, it is characterized in that: described arc electrode (6) constitutes the outer air gap (4) of connecting with electrode (14), the distance of this air gap is determined by a large amount of tests, and time discharge occurs between this gap to guarantee overvoltage, guarantees that simultaneously this gap can bear system's power-frequency withstand voltage.
CN200910208693A 2009-10-24 2009-10-24 Lightning arrester insulator for overhead wire insulated conductor Pending CN101699573A (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
CN200910208693A CN101699573A (en) 2009-10-24 2009-10-24 Lightning arrester insulator for overhead wire insulated conductor

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Application Number Priority Date Filing Date Title
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Cited By (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN102957117A (en) * 2011-08-26 2013-03-06 王哲斐 Lightning-proof tension insulator string
CN103490284A (en) * 2013-09-30 2014-01-01 山东迅实电气有限公司 External column type voltage limiter for urban rail catenary
CN104882876A (en) * 2015-06-19 2015-09-02 中国电力科学研究院 Extra-high voltage DC grounding electrode circuit protection system
CN105426671A (en) * 2015-11-11 2016-03-23 重庆大学 Method for evaluating reliability of overhead power distribution line in thunderstorm weather
CN111200268A (en) * 2020-02-26 2020-05-26 广东电网有限责任公司湛江供电局 Installation method of safety lightning arrester

Cited By (8)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN102957117A (en) * 2011-08-26 2013-03-06 王哲斐 Lightning-proof tension insulator string
CN103490284A (en) * 2013-09-30 2014-01-01 山东迅实电气有限公司 External column type voltage limiter for urban rail catenary
CN104882876A (en) * 2015-06-19 2015-09-02 中国电力科学研究院 Extra-high voltage DC grounding electrode circuit protection system
CN104882876B (en) * 2015-06-19 2018-12-11 中国电力科学研究院 A kind of extra-high voltage direct current ground electrode circuit guard system
CN105426671A (en) * 2015-11-11 2016-03-23 重庆大学 Method for evaluating reliability of overhead power distribution line in thunderstorm weather
CN105426671B (en) * 2015-11-11 2018-02-16 重庆大学 The reliability evaluating method of overhead distribution under a kind of Thunderstorm Weather
CN111200268A (en) * 2020-02-26 2020-05-26 广东电网有限责任公司湛江供电局 Installation method of safety lightning arrester
CN111200268B (en) * 2020-02-26 2021-06-29 广东电网有限责任公司湛江供电局 Installation method of safety lightning arrester

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Open date: 20100428