CN104361959A - Disconnection-preventing parallel-connected gap device - Google Patents

Disconnection-preventing parallel-connected gap device Download PDF

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Publication number
CN104361959A
CN104361959A CN201410716488.8A CN201410716488A CN104361959A CN 104361959 A CN104361959 A CN 104361959A CN 201410716488 A CN201410716488 A CN 201410716488A CN 104361959 A CN104361959 A CN 104361959A
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China
Prior art keywords
side electrode
drainage tube
electrode
wire
puncture
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CN201410716488.8A
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CN104361959B (en
Inventor
郭润生
何彩红
马晶晶
马晓明
杨文鹏
苏文斌
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State Grid Corp of China SGCC
Shuozhou Power Supply Co of State Grid Shanxi Electric Power Co Ltd
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State Grid Corp of China SGCC
Shuozhou Power Supply Co of State Grid Shanxi Electric Power Co Ltd
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Abstract

The invention relates to a disconnection-preventing parallel-connected gap device which belongs to the technical field of lightning protection of a distribution circuit, and aims at providing a disconnection-preventing parallel-connected gap lightning protection device for the distribution circuit, which can be used for effectively solving the problem of lightning stroke disconnection of the distribution circuit and more accurately positioning lightning stroke flashover and is simple in structure and convenient to install. The adopted technical scheme is as follows: the disconnection-preventing parallel-connected gap device comprises an drainage tube, a wire side electrode and a grounding side electrode, wherein the drainage tube tightly sleeves the wire, and the inner wall of the drainage tube is provided with a plurality of thorns which penetrate through an insulating layer; the horizontal end part of the right-angled L-shaped wire side electrode is provided with a sphere, and the vertical end part of the right-angled L-shaped wire side electrode is fixedly connected with the drainage tube; and one end of the grounding side electrode is provided with the sphere, the other end of the grounding side electrode is fixedly connected with the bottom end of an insulator, one end, which is close to the sphere, of the grounding side electrode is provided with a ridge-shaped convex folding line structure, and the electrode end parts of the wire side electrode and the grounding side electrode are absolutely aligned. The disconnection-preventing parallel-connected gap device disclosed by the invention is installed on an electric wire so as to be used for preventing the lightning stroke disconnection.

Description

A kind of anti-breaking line style parallel connection clearance device
Technical field
A kind of anti-breaking line style parallel connection clearance device of the present invention, belongs to the lightning-protection engineering field of distribution line.
Background technology
The research of domestic electrical system damage to crops caused by thunder, mostly for transmission line, transformer station and power plant etc., very lacks the content of system research distribution line lightning protection aspect.In order to solve the impact of the external objects such as branch on distribution wire, improve power supply reliability, 10kV overhead transmission line is changed into insulated conductor distribution line by China's major part city just gradually.Although carried out the insulating transformation of middle pressure rack overhand lines, distribution line has been greatly improved compared to its general level of the health of plain conductor, and also occurred new technical problem, one of them is the problem of insulated conductor breakage caused by lightning stroke simultaneously.Distribution line is once broken string, long power failure will be caused, and charged wire breaks and falls on the ground, likely cause the electric shock accidents of the personnel of passing by, this broken string and pyrophoricity accident seriously affect the safe operation of distribution system, bring very big inconvenience to national economy and people's lives.Therefore, the research of the broken string mechanism and guard technology thereof of carrying out insulated conductor is very necessary.
Relative to voltage levels transmission line; 10kV distribution line does not generally adopt method such as erection lightning conducter, coupling ground wire etc.; and by means of only adopting reinforced insulation, installing the lightning withstand level that " blocking " type lightning-protection methods such as leakage conductor improve power distribution network, and then reduce tripping rate with lightning strike.But these measures all have certain limitation, the generation of distribution line thunderbolt power outage can not be prevented efficiently.And " blocking " type lightning protection has seemed conservative and unilateral, further research economical and practical, novel line thunder protection safeguard measure is necessary.In recent years, parallel connection clearance device, as the lightning protection device of a kind of " diverting type ", has become the strong of traditional circuit lightning protection mode and has supplemented, can solve the difficult problem that distribution line faces in lightning protection.This installation cost is low, and simple installation is easy to spread, and can significantly reduce lightning-caused breaking, the permanent fault such as insulator bursts, reduce the economic loss that power outage brings.
The operation principle of parallel connection gaps is: the pair of metal electrodes in parallel on insulator side, form portable protective gaps, be arranged on the end of insulator, both can be struck by lightning circuit time and system in automatic reclosing with the use of, by timely for lightning current ground connection to user's uninterrupted power supply, thus prevent the effect that insulator surface flashover maintenance circuit normally runs; Can, by coordinating with the blow-out equipment of parallel connection gaps end, before reclosing action, utilize blow-out equipment that electric arc is caused insulator end extinguish fast again, thus can not insulator be burnt out while guarantee line security runs.The parallel gap lightning protection device of existing overhead distribution insulator, have following major defect: 1. this parallel gap lightning protection device is only applicable to the lightning protection of overhead bare conductor, the structure of its device is not adapted at suspended insulated guide wire uses; 2. parallel clearance lightning protection device dredges by drainage needle the disconnection problem that power frequency arc can solve insulated conductor to a certain extent, but when insulated conductor tolerance big current still may because piercing portions to be in contact with it area little and the wire of both sides firmly can not be held thus cause the generation of broken string situation.
Summary of the invention
The present invention overcomes the deficiency that prior art exists; technical problem to be solved is to provide a kind of for the anti-breaking line style parallel gap lightning protection device of distribution line; the lightning-caused breaking problem of effective solution distribution line also more accurately can locate lightning stroke flashover, and structure is simple, easy for installation.
In order to solve the problems of the technologies described above, the technical solution adopted in the present invention is: a kind of anti-breaking line style parallel connection clearance device, comprise drainage tube, side of wire electrode and ground side electrode, drainage tube is closely sleeved on wire, the inwall of drainage tube is provided with multiple puncture penetrating insulating barrier, the lateral ends of the side of wire electrode of right angle L shape is ball and vertical end is fixedly connected with drainage tube, one end of ground side electrode is ball and the other end is fixedly connected with insulator bottom, ground side electrode is the meander line structure being provided with a mountain ridge near one end of ball, the electrode tip of described side of wire electrode and ground side electrode definitely aligns.
Multiple punctures on the inwall of described drainage tube are that multiple large puncture and multiple little puncture are spaced, and the height of large puncture is greater than thickness of insulating layer, and the height of little puncture is less than thickness of insulating layer.
The short circuit distance of described side of wire electrode and ground side electrode is 22-33 ㎜.
Described puncture, drainage tube, side of wire electrode and ground side electrode make by the high temperature resistant and carbon steel that intensity is high.
Described ground side electrode coordinates band steel to punching with insulator bottom by connecting bolt to be fixedly connected with.
The present invention compared with the existing technology have beneficial effect is: the present invention by side of wire electrode, ground side electrode short circuit insulator a part, can effective location lightning stroke flashover, high potential when flashover is occurred by the puncture of drainage tube by side of wire electrode on wire is drawn, effectively can dredge power frequency arc by the cooperation of side of wire electrode and ground side electrode, avoid insulator to be subject to serious ablation; Size puncture on drainage tube inwall is spaced, and large puncture is highly greater than insulating barrier and ensures that it can conductor in close contact insulating barrier, extracted current, and little puncture is thrust insulating barrier and firmly held by wire thus avoid broken string situation to occur.
Accompanying drawing explanation
Below in conjunction with accompanying drawing, the invention will be further described.
Fig. 1 is structural representation of the present invention.
Fig. 2 is the cross-sectional view of drainage tube in the present invention.
Fig. 3 is the left view of Fig. 2.
In figure: 1 is drainage tube, 2 is side of wire electrode, and 3 is ground side electrode, and 4 is wire, and 5 is puncture, and 6 is insulator, and 7 is mountain ridge.
Embodiment
As Figure 1-3, a kind of anti-breaking line style parallel connection clearance device of the present invention, comprise drainage tube 1, side of wire electrode 2 and ground side electrode 3, drainage tube 1 is closely sleeved on wire 4, the inwall of drainage tube 1 is provided with multiple puncture 5 penetrating insulating barrier, the lateral ends of the side of wire electrode 2 of right angle L shape is ball and vertical end is fixedly connected with drainage tube 1, one end of ground side electrode 3 is ball and the other end is fixedly connected with insulator 6 bottom, ground side electrode 3 is the meander line structure being provided with a mountain ridge 7 near one end of ball, the electrode tip of described side of wire electrode 2 and ground side electrode 3 definitely aligns.
Multiple punctures 5 on the inwall of described drainage tube 1 are spaced for multiple large puncture and multiple little puncture, and the height of large puncture is greater than thickness of insulating layer, and the height of little puncture is less than thickness of insulating layer.
The short circuit distance of described side of wire electrode 2 and ground side electrode 3 is 22-33 ㎜.
Described puncture 5, drainage tube 1, side of wire electrode 2 and ground side electrode 3 make by the high temperature resistant and carbon steel that intensity is high.
Described ground side electrode coordinates band steel to punching with insulator 6 bottom by connecting bolt to be fixedly connected with.
Embodiment
Drainage tube 1 is the hollow semi-cylindrical that two horizontal lengths are about 80-100mm, distance insulator axis 230-260mm place on wire 4 is closely fixed on by bolt, puncture 5 on drainage tube 1 inwall is conical metal tip and the puncture of multiple size is spaced, as Figure 2-3, a puncture is greatly established after every three little punctures, large puncture is highly taken as the 20%-30% of insulated conductor overall diameter, that punctures is spaced apart 3-6mm, little puncture contacts secure wires with insulating barrier, large puncture insulation-piercing layer and wire close contact, draw high potential;
Side of wire electrode 2 is right angle L shape, and horizontal length is 180-220mm, and vertical length is that 15-20mm horizontal end is provided with steel ball, and vertical upper end is fixedly connected with drainage tube 1 by nut;
Ground side electrode 3 is for there being the fold-line-shaped structure of mountain ridge, and the vertical height of mountain ridge 7 is 15-25 ㎜, and horizontal length is 420-460mm, has the end, one end of mountain ridge 7 to be provided with steel ball, the other end by fastening nuts in insulator 6 bottom;
Side of wire electrode 2 and ground side electrode 3 need end definitely to align when mounted.
It is below implementation result explanation of the present invention.
50% lightning impulse test: after the present invention is installed at insulator two ends, the basic fixed position of lightning wave flashover path, in the end of parallel connection gaps, has good linear relationship between clearance distance and discharge voltage value.
Lightning impulse voltage-second characteristic test: object will study the change of lightning impulse wave steepness for the flashover voltage of annular parallel connection gaps and the impact of discharge time; according to the insulation coordination principle of insulator string and annular parallel connection gaps, test known parallel connection gaps from Lightning Characteristic and good protective effect is served to insulator string.
By reference to the accompanying drawings embodiments of the invention are explained in detail above, but the present invention is not limited to above-described embodiment, in the ken that those of ordinary skill in the art possess, various change can also be made under the prerequisite not departing from present inventive concept.

Claims (5)

1. an anti-breaking line style parallel connection clearance device, it is characterized in that: comprise drainage tube (1), side of wire electrode (2) and ground side electrode (3), drainage tube (1) is closely sleeved on wire (4), the inwall of drainage tube (1) is provided with multiple puncture (5) penetrating insulating barrier, the lateral ends of the side of wire electrode (2) of right angle L shape is ball and vertical end is fixedly connected with drainage tube (1), one end of ground side electrode (3) is ball and the other end is fixedly connected with insulator (6) bottom, ground side electrode (3) is the meander line structure being provided with a mountain ridge (7) near one end of ball, the electrode tip of described side of wire electrode (2) and ground side electrode (3) definitely aligns.
2. the anti-breaking line style parallel connection clearance device of one according to claim 1, it is characterized in that: the multiple punctures (5) on the inwall of described drainage tube (1) are spaced for multiple large puncture and multiple little puncture, the height of large puncture is greater than thickness of insulating layer, and the height of little puncture is less than thickness of insulating layer.
3. the anti-breaking line style parallel connection clearance device of one according to claim 1 and 2, is characterized in that: the short circuit distance of described side of wire electrode (2) and ground side electrode (3) is 22-33 ㎜.
4. the anti-breaking line style parallel connection clearance device of one according to claim 1 and 2, is characterized in that: described puncture (5), drainage tube (1), side of wire electrode (2) and ground side electrode (3) make by the high temperature resistant and carbon steel that intensity is high.
5. the anti-breaking line style parallel connection clearance device of one according to claim 1 and 2, is characterized in that: described ground side electrode coordinates band steel to punching with insulator (6) bottom by connecting bolt to be fixedly connected with.
CN201410716488.8A 2014-12-02 2014-12-02 Disconnection-preventing parallel-connected gap device Active CN104361959B (en)

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Cited By (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN104766681A (en) * 2015-04-17 2015-07-08 国家电网公司 Adjustable parallel connecting interval structure of strain insulator string
CN110635355A (en) * 2019-10-09 2019-12-31 杭州富阳锐明科技有限公司 Gap lightning protection device based on electromagnetic transformation

Citations (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
EP0506393A2 (en) * 1991-03-27 1992-09-30 Ngk Insulators, Ltd. Arrester
JPH06283065A (en) * 1993-03-26 1994-10-07 Ngk Insulators Ltd Lightning arrester insulator assembly
CN202650738U (en) * 2012-07-09 2013-01-02 国家电网公司 Electric discharge clamping porcelain insulator
CN203660068U (en) * 2013-12-01 2014-06-18 国家电网公司 Arc-tight puncturing armor clamp for overhead insulating lead
CN203850790U (en) * 2014-05-15 2014-09-24 上海缆天电气有限公司 Puncture-type junction box and bus duct thereof

Patent Citations (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
EP0506393A2 (en) * 1991-03-27 1992-09-30 Ngk Insulators, Ltd. Arrester
JPH06283065A (en) * 1993-03-26 1994-10-07 Ngk Insulators Ltd Lightning arrester insulator assembly
CN202650738U (en) * 2012-07-09 2013-01-02 国家电网公司 Electric discharge clamping porcelain insulator
CN203660068U (en) * 2013-12-01 2014-06-18 国家电网公司 Arc-tight puncturing armor clamp for overhead insulating lead
CN203850790U (en) * 2014-05-15 2014-09-24 上海缆天电气有限公司 Puncture-type junction box and bus duct thereof

Cited By (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN104766681A (en) * 2015-04-17 2015-07-08 国家电网公司 Adjustable parallel connecting interval structure of strain insulator string
CN110635355A (en) * 2019-10-09 2019-12-31 杭州富阳锐明科技有限公司 Gap lightning protection device based on electromagnetic transformation

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