阅读说明：本技术 一种串接式反冲灭弧绝缘子 (A kind of concatenation type recoil arc extinguishing insulator ) 是由 金鑫 张奇星 李心如 王巨丰 李籽剑 王锟 张清河 徐宇恒 王嬿蕾 孙鑫 于 2019-10-16 设计创作，主要内容包括：本发明公开了一种串接式反冲灭弧绝缘子,属于输配电架空线路防雷技术领域,包括若干个绝缘子和连接杆,若干个绝缘子通过连接杆串接构成绝缘子串,绝缘子串两端均设置有反冲灭弧装置,反冲灭弧装置包括导弧电极、导线和端位绝缘子,所述导弧电极设置在外部的连接件上,且通过导线连接到端位绝缘子上。本发明绝缘子灭弧时间提前,由传统的贯穿闪络绝缘配合提前到局部闪络绝缘配合,局部闪络后绝大多数绝缘没有击穿,仅仅出现沿面放电,此时灭弧对象只是极弱冲击电弧的流注,脆弱性高、灭弧难度低。(The invention discloses a kind of concatenation type recoil arc extinguishing insulators, belong to power transmission and distribution overhead transmission line anti-thunder technical field, including several insulators and connecting rod, several insulators are concatenated by connecting rod and constitute insulator chain, insulator chain both ends are provided with recoil arc-control device, recoil arc-control device includes leading arc electrode, conducting wire and end position insulator, and the arc electrode of leading is arranged on external connector, and is wired on the position insulator of end.The insulator quenching time of the present invention shifts to an earlier date, local flashover Insulation Coordination is advanceed to through flashover Insulation Coordination by traditional, most insulation do not puncture after local flashover, creeping discharge only occur, arc extinguishing object is the streamer of extremely weak impact electric arc at this time, and fragility is high, arc extinguishing difficulty is low.)

The arc extinguishing insulator 1. a kind of concatenation type recoils, including several insulators (2) and connecting rod (1), several insulators (2) It is concatenated by connecting rod (1) and constitutes insulator chain, which is characterized in that insulator chain both ends are provided with recoil arc-control device, instead Rushing arc-control device includes leading arc electrode (3), conducting wire (4) He Duanwei insulator (5), and outside is arranged in the arc electrode (3) of leading On connector, and it is connected on end position insulator (5) by conducting wire (4).

The arc extinguishing insulator 2. a kind of concatenation type according to claim 1 recoils, it is characterised in that: end position insulator (5) several arc extinguishing channels (6) are provided in, are provided with spout (7) on each arc extinguishing channel (6), each arc extinguishing channel (6) It is connected to by spout (7) with outside, is connect between arc extinguishing channel (6) and arc extinguishing channel (6) by connecting line, conducting wire (4) One end is connect with one of arc extinguishing channel (6).

The arc extinguishing insulator 3. a kind of concatenation type according to claim 2 recoils, it is characterised in that: arc extinguishing channel (6) include It connecing and dodges component (9), arc electrode (10) and recoil tube (11), the arc electrode (10) is arranged in one end of recoil tube (11), It connects and dodges the other end that component (9) are sealingly disposed in recoil tube (11).

The arc extinguishing insulator 4. a kind of concatenation type according to claim 3 recoils, it is characterised in that: the conducting wire (4) and its In connecing for arc extinguishing channel (6) dodge component (9) connection, be set as electric arc entrance, and arc extinguishing channel (6) and arc extinguishing channel (6) The spout (7) of not parallel setting, two neighboring arc extinguishing channel (6) is connected by connecting line (8).

The arc extinguishing insulator 5. a kind of concatenation type according to claim 3 recoils, it is characterised in that: the recoil tube (11) is adopted It is made of the high voltage bearing non-conducting material of high-strength high temperature-resistant, non-conducting material is made as ceramal, rare-earth ceramic, graphene- Ceramic composite, organic ceramic, silastic elastomer, organic insulating material, glass alloy, rare earth glass, Graphene glass or The inner diameter size of person's organic glass, recoil tube (11) increases with transmission line of electricity voltage class and is increased.

The arc extinguishing insulator 6. a kind of concatenation type according to claim 2 recoils, it is characterised in that: end position insulator (5) diameter is bigger than the diameter of insulator (2), upper end of spout (7) setting at end position insulator (5).

The arc extinguishing insulator 7. a kind of concatenation type according to claim 2 recoils, it is characterised in that: several arc extinguishing channels (6) it is set as the arc extinguishing channel path of multistage " Z " type broached-tooth design, and is embedded in the inside at end position insulator (5).

The arc extinguishing insulator 8. a kind of concatenation type according to claim 3 recoils, it is characterised in that: arc electrode (10) setting It is tightly attached to the inner wall of recoil tube (11) for the lateral wall of conductive metal ring, and conductive metal ring.

The arc extinguishing insulator 9. a kind of concatenation type according to claim 1 recoils, it is characterised in that: described to lead arc electrode (3) It is set as metal collar structure, is set on external metallization connector.

Technical field

The present invention relates to power transmission and distribution overhead transmission line anti-thunder technical field more particularly to a kind of recoil arc extinguishing insulation of concatenation type Son.

Background technique

When thundercloud is assembled to form thundercloud and ground potential difference, severe non-uniform electric field is always induced at insulator.It grinds The electric-field intensity distribution studied carefully when showing to be struck by lightning between each insulator difference the piece number is also very uneven, shows as insulator chain The electric field strength at high, the intermediate position of the electric field strength of both ends sub-pieces is low.Since head and end insulator electric field intensity is big, absolutely Edge middle part potential electrical field intensity is low, and lightning stroke flashover electric arc primarily occur ins the both ends of insulator chain, then from insulator chain two It holds to intermediate position and develops.

Nowadays the arrester being widely used in power circuit is mainly intervened when being struck by lightning and occurring with parallel connection gaps, is passed Uniting, there are shortcomings for arrester, such as: difficult in maintenance, lightning protection effect is low, can not protect superposition lightning stroke etc..Parallel connection gaps There are shortcomings, such as: (1) parallel connection gaps installation need to add fitting, and installation tool acquires a certain degree of difficulty；(2) parallel connection gaps is exhausted Edge cooperation is designed by insulator chain head and the tail two panels insulator highest breakdown voltage, since shelf depreciation primarily occur ins first and last end, Cause the Insulation Coordination of parallel connection gaps than need very it is low, the dielectric level of route can be reduced in this way, lead to tripping rate with lightning strike It increases；(3) parallel connection gaps electrode is repeatedly by power frequency continued flow electric arc calcination, and it is ablated to will lead to metal electrode, reduces parallel connection gaps With the Insulation Coordination ability of insulator.

For deficiency existing for arrester and parallel connection gaps, it is proposed that a kind of concatenation type applied to transmission line of electricity lightning protection is anti- Rush arc extinguishing insulator.

Summary of the invention

The purpose of the present invention is to provide a kind of concatenation type recoil arc extinguishing insulators, to solve skill present in background technique Art problem.

A kind of concatenation type recoil arc extinguishing insulator, including several insulators and connecting rod, several insulators pass through company Extension bar concatenation constitutes insulator chain, and insulator chain both ends are provided with recoil arc-control device, and recoil arc-control device includes leading arc electricity Pole, conducting wire and end position insulator, the arc electrode of leading is arranged on external connector, and is wired to the insulation of end position On son.

Further, several arc extinguishing channels are provided in the insulator of the end position, are provided on each arc extinguishing channel Spout, each arc extinguishing channel pass through spout and are connected to outside, connected, led by connecting line between arc extinguishing channel and arc extinguishing channel One end of line is connect with one of arc extinguishing channel.

Further, arc extinguishing channel includes connecing to dodge component, arc electrode and recoil tube, and the arc electrode setting is recoiling One end of pipe connects and dodges the other end that component is sealingly disposed in recoil tube.

Further, the conducting wire is connect with the sudden strain of a muscle component that connects in one of arc extinguishing channel, is set as electric arc entrance, and go out Arc channel and arc extinguishing difference between diversity channels row are arranged, and the spout in two neighboring arc extinguishing channel is connected by connecting line.

Further, the recoil tube is made of the high voltage bearing non-conducting material of high-strength high temperature-resistant, non-conducting material It is made as ceramal, rare-earth ceramic, Graphene-ceramic composite material, organic ceramic, silastic elastomer, organic insulating material, conjunction The inner diameter size of golden glass, rare earth glass, Graphene glass or organic glass, recoil tube is increased with transmission line of electricity voltage class And increase.

Further, the diameter of end position insulator is bigger than the diameter of insulator, and notch setting is in end position insulator Upper end.

Further, several arc extinguishing channels are set as the arc extinguishing channel path of multistage " Z " type broached-tooth design, and are embedded Hold the inside of position insulator.

Further, arc electrode is set as conductive metal ring, and the lateral wall of conductive metal ring is tightly attached to recoil tube Inner wall.

Further, the arc electrode of leading is set as metal collar structure, is set on external metallization connector.

The local field strength of the first and last two panels insulator of insulator chain is high, is easy preferential flashover, therefore in the first and last of insulator chain The biggish insulator of two panels area is designed at both ends, arc eliminating module is equipped in first and last two panels insulator, for protecting insulator String head and end.In the pilot stage of thunder discharge, for non-uniform electric field local discharge characteristic position, in the head of insulator chain The biggish insulator of two panels area is designed at last both ends, is equipped with arc eliminating module in first and last two panels insulator, traditional is run through Flashover Insulation Coordination advances to local flashover insulation, realizes effective extinguishing to local electrical discharge arc, puts to eliminate from part Electricity develops into the basic condition of main discharge, greatly reduces arc extinguishing difficulty, eliminates lightning stroke flashover and builds arc harm, it is ensured that lightning stroke is not jumped Lock.

It is respectively equipped with arc electrode at the first and last end of insulator chain, arc electrode is respectively fitted over the first and last end of insulator chain simultaneously It is contacted with insulator first and last end metal outer wall.Arc electrode is made of metal material, and exhausted with head and end respectively by conducting wire Arc eliminating module in edge is connected, and carries out arc extinguishing to local flashover arc, prevents through flashover.The effect of arc electrode: When lightning stroke flashover electric arc occurs near insulator, arc electrode can be drawn neighbouring electric arc to the arc extinguishing of both ends sub-pieces In module.Arc eliminating module be arranged inside the sub-pieces of both ends, arc eliminating module by multistage " Z " type broached-tooth design arc extinguishing passway Diameter composition.An arc-extinguishing tube is equipped in each section of arc extinguishing channel path, arc-extinguishing tube may be designed as recoil structure, arc extinguishing tube material It can be ceramic tube etc. for high-strength insulating material.It is connected with camber line is led between arc-extinguishing tube in different section arc channels path, make Electric arc is converted in specified arc channel.Electric arc spout, external spout and inside are equipped in first and last end sub-pieces outer surface Arc channel interconnects.

It further illustrates, back flush unit is set as inner hollow, open at one end, the closed semiclosed pipe fitting of the other end.If A dry back flush unit includes arc-striking module, recoil module and connects sudden strain of a muscle module, and the arc-striking module opening is arranged in recoil module One end, described connect dodge module closing the other end of recoil module be arranged in.The arc-striking module and connect dodge module be by leading Electric material is made, and arc-striking module is conductive metal ring, and the lateral wall of conductive metal ring is tightly attached to the inner wall of recoil tube.

Basic principle of the invention:

Backsurging principle: entrance electric arc rapidly enters recoil arc-extinguishing tube, rushes at and leads arc electrode and elastic collision occurs, makes electric arc 180 ° of conversions occur for direction, form outlet electric arc, leave recoil arc-extinguishing tube, spray from electric arc spout；Outlet electric arc is recoiled Recoil arc-extinguishing tube is left in effect, weakens the energy in recoil arc-extinguishing tube, while hindering the entrance of entrance electric arc, in recoil arc-extinguishing tube Inlet forms electric arc large scale fracture, destroys electric arc continuity, accelerates arc extinction；Recoil come out outlet arcing in Recoil arc extinguishing tube inlet dispatch from foreign news agency arc, forms cavity effect, accelerates the truncation of outer electric arc.

Present invention employs above-mentioned technical proposal, the present invention is had following technical effect that

(1) the insulator quenching time of the present invention shifts to an earlier date, and through flashover Insulation Coordination to advance to local flashover exhausted by traditional Edge cooperates, and most insulation do not puncture after local flashover, creeping discharge only occurs, and arc extinguishing object is extremely weak punching at this time The streamer of electric arc is hit, fragility is high, arc extinguishing difficulty is low.

(2) arc extinguishing is easier to, and is built arc channel and is belonged to non-connected pathways, damps huge.

(3) restriking is more difficult, and weak arc of building once is interrupted, and faster, arc channel fragility is bigger for medium recovery, goes to free area Domain is bigger.

(4) arc eliminating module security advantages, the flashover caused for power-frequency overvoltage were also off in the partial discharge stage.This is just The appearance of the big electric arc of power frequency is completely eliminated, effectively ensures arc eliminating module not and will receive the destruction of big energy, improve arc eliminating module The range and itself durability for inhibiting overvoltage, bear the need of simple power-frequency overvoltage arc extinguishing ability completely.

(5) by arc eliminating module and being made of one of insulator chain, installation is simple, and economy is high.

Detailed description of the invention

Fig. 1 is insulator structure schematic diagram of the present invention.

Fig. 2 is end position of the present invention insulator structure schematic diagram.

Fig. 3 is end position of the present invention insulator transversal profile figure.

Fig. 4 is end end position of the present invention interior insulator recoil structure schematic diagram.

Fig. 5 is arc extinguishing channel cross-section figure of the present invention.

Fig. 6 is end end position of the present invention interior insulator connection schematic diagram.

Fig. 7 is arc extinguishing channel of the present invention schematic diagram.

Fig. 8 is the induction field intensity distribution rule figure of insulator chain of the present invention.

In figure: 1- connecting rod；2- insulator；3- leads arc electrode；4- conducting wire；The end 5- position insulator；6- arc extinguishing channel；7- spray Mouthful；8- connecting line；9- connects sudden strain of a muscle component；10- arc electrode；11- recoil tube.

Specific embodiment

To make the objectives, technical solutions, and advantages of the present invention more comprehensible, referring to the drawings and preferred reality is enumerated Example is applied, the present invention is described in more detail.However, it is necessary to illustrate, many details listed in specification are only to be Reader is set to have a thorough explanation to one or more aspects of the present invention, it can also be with even without these specific details Realize the aspects of the invention.

According to above-mentioned principle explanation and refering to fig. 1 to further explanation of the embodiment of the present invention:

As shown in figure 8, the first and last two panels insulator of insulator chain, i.e. end position insulator 5, as shown in figure 1 the 1st and the 7th The local field strength of piece, first and last two panels insulator is high, is easy preferential flashover, therefore designs two panels area in the head and end of insulator chain Biggish insulator is equipped with recoil arc-control device in first and last two panels insulator, for protecting insulator chain head and end.Instead Rush arc-control device can be manufacture end position insulator 5 carry out inside leave a blank or by later period turn hole generate etc..It is put in thunder and lightning The pilot stage of electricity designs two panels area in the head and end of insulator chain for non-uniform electric field local discharge characteristic position Biggish insulator (the 1st, the 7th), is equipped with recoil arc-control device in first and last two panels insulator, by traditional through sudden strain of a muscle Network Insulation Coordination advances to local flashover insulation, realizes effective extinguishing to local electrical discharge arc, to eliminate from shelf depreciation The basic condition of main discharge is developed into, arc extinguishing difficulty is greatly reduced, eliminate lightning stroke flashover and builds arc harm, it is ensured that lightning stroke is not jumped Lock.

Firstly, thunder and lightning is transmitted to by external metal connecting piece and leads arc electrode 3 after thundering, leads arc electrode 3 and pass through conducting wire again 4 electric arcs pass in the position insulator 5 of end and carry out recoil arc extinguishing.

Arc electrode 3 is led as shown in Figure 1, being respectively equipped at the first and last end of insulator chain, arc electrode 3 is led and is respectively fitted over insulator The first and last end of string is simultaneously contacted with insulator first and last end metal outer wall.It leads arc electrode 3 to be made of metal material, and is divided by conducting wire 4 It is not connected with the recoil arc-control device in head and end insulator.Lead the effect of arc electrode 3: when lightning stroke flashover electric arc occurs exhausted When near edge, neighbouring electric arc can be drawn to the recoil arc-control device of both ends sub-pieces by leading arc electrode 3.

It holds the diameter of position insulator 5 all can be bigger than the diameter of intermediate other insulators, is covered by the diameter at both ends Lid, so that carrying out the effect of both ends arc extinguishing.

As in Figure 2-4, lightning flash over electric arc passes sequentially through first and last end and leads in arc electrode 3 and the entrance insulator chain of conducting wire 4 Arc extinguishing channel 6,11 pairs of impact electric arcs of recoil tube in arc extinguishing channel 6 carry out recoil arc extinguishing effect, and electric arc is sprayed from spout A. Residue does not extinguish electric arc and enters second segment arc extinguishing channel 6 under the action of connecting line 8, equally carries out recoil arc extinguishing to electric arc and makees With electric arc is sprayed from spout B.Process is same as above later, until electric arc is off.

As shown in figure 5, arc extinguishing channel 6 is set as inner hollow, open at one end, the closed semiclosed pipe fitting of the other end.If Dry arc extinguishing channel 6 includes connecing to dodge component 9, arc electrode 10 and recoil tube 11.The opening of arc extinguishing channel 6 setting is recoiling One end of pipe 11, described connect dodge the other end that recoil tube 11 is arranged in the closing of component 9.It the arc electrode 10 and connects and dodges component 9 It is to be made of an electrically conducting material, arc-striking module is conductive metal ring, and the lateral wall of conductive metal ring is tightly attached to recoil tube 11 Inner wall.,

As shown in fig. 7, can define outer electric arc in inlet speed is v0, and pressure p0, density is ρ 0, temperature in the application Degree is T0.After outer electric arc enters recoil component, the entrance arc speed v1 of formation, pressure p1, density is ρ 1, temperature T1. Arc speed v2, pressure p2 are exported after striking component, density is ρ 2, temperature T2.Outer electric arc is entered anti-by entrance It rushes component and forms interior electric arc, interior electric arc is limited by recoil component walls, and diameter is by large scale mechanical compression, so that interior electric arc Temperature, density, pressure and speed rise.Arc energy loss and rubbing action are not considered, when entrance electric arc is by connecing sudden strain of a muscle group Part realizes elastic collision moment, it is believed that v1=-v2, i.e. entrance arc speed size and muzzle velocity are equal in magnitude, contrary. Consider arc energy loss and rubbing action, entrance electric arc is after connecing and dodging component collision, Ren Wei ∣ v2 ∣ < ∣ v1 ∣, i.e. outlet speed It is smaller than entrance velocity to spend size, it is contrary.Inhibition of the electric arc by entrance electric arc is exported, outlet arc diameter compares entrance Arc diameter is small, keeps the density, temperature and pressure that export electric arc bigger than entrance electric arc, i.e. 2 > ρ 1 of ρ, T2 > T1, p2 > P1, these collective effects make v2 speedup be greater than v1 speedup, i.e. a2 > a1.As outlet arc diameter is constantly compressed, make to obtain Mouth arc density, temperature and pressure constantly increase, and ultimately form v2 > v1, and outlet electric arc is promoted to go out recoil group from inlet Part.After outlet electric arc is to go out recoil component, external electric arc forms cavity effect, destroys electric arc continuity, weakens arc energy, It is accelerated to be truncated and extinguish.

The above shows and describes the basic principles and main features of the present invention and the advantages of the present invention, for this field skill For art personnel, it is clear that invention is not limited to the details of the above exemplary embodiments, and without departing substantially from spirit of the invention or In the case where essential characteristic, the present invention can be realized in other specific forms.Therefore, in all respects, should all incite somebody to action Embodiment regards exemplary as, and is non-limiting, the scope of the present invention by appended claims rather than on state Bright restriction, it is intended that including all changes that fall within the meaning and scope of the equivalent elements of the claims in the present invention It is interior.Any reference signs in the claims should not be construed as limiting the involved claims.

The above is only a preferred embodiment of the present invention, it is noted that for the ordinary skill people of the art For member, without departing from the principle of the present invention, it can also make several improvements and retouch, these improvements and modifications are also answered It is considered as protection scope of the present invention.