CN207302760U - A kind of anti-icing anti-thunder insulator - Google Patents

A kind of anti-icing anti-thunder insulator Download PDF

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Publication number
CN207302760U
CN207302760U CN201720878032.0U CN201720878032U CN207302760U CN 207302760 U CN207302760 U CN 207302760U CN 201720878032 U CN201720878032 U CN 201720878032U CN 207302760 U CN207302760 U CN 207302760U
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China
Prior art keywords
ring
insulator
uniform pressure
umbrella cover
icing
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CN201720878032.0U
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Chinese (zh)
Inventor
蒋正龙
陆佳政
吴伟
李波
方针
胡建平
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State Grid Corp of China SGCC
State Grid Hunan Electric Power Co Ltd
Disaster Prevention and Mitigation Center of State Grid Hunan Electric Power Co Ltd
Hunan Xiangdian Test Research Institute Co Ltd
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State Grid Corp of China SGCC
State Grid Hunan Electric Power Co Ltd
Disaster Prevention and Mitigation Center of State Grid Hunan Electric Power Co Ltd
Hunan Xiangdian Test Research Institute Co Ltd
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Abstract

The utility model provides a kind of anti-icing anti-thunder insulator, including gap section, and the first compound umbrella cover of the gap section is internally provided with first annular resistor disc, and plug passes through the centre bore of multiple first annular resistor discs.By in gap section setting resistor disc, the ratio that gap section undertakes voltage is reduced, reduce further the maximum field strength of insulator, improves the ability of insulator reply heavy pollution area icing flashover, and the tower window construction size that is content with very little requirement, so as to simple installation, reduce investment outlay.

Description

A kind of anti-icing anti-thunder insulator
Technical field
It the utility model is related to electrical engineering technical field, and in particular to a kind of anti-icing anti-thunder insulator.
Background technology
Insulator is a kind of special insulation control, can be played an important role in overhead transmission line.Between one's early years absolutely Edge is chiefly used in electric pole, and the one end for being slowly developed in high type high-tension bus-bar connection tower has hung the insulator of many plate-likes, it is In order to increase creepage distance, usually it is made of glass or ceramics, is just insulator.
Since power network line can extend to a varied topography and very cold area, it is therefore desirable to which insulator has anti-icing anti- The ability of thunder.Anti-icing anti-thunder insulator generally use gap section of the prior art and the structure of lightning-arrest section series connection, so that absolutely Edge possesses the function of arrester and insulator at the same time.The structure of insulator generally use extra-large shed, to delay ice coating state The ice slush bridge joint process of lower full skirt.Anti-icing anti-thunder insulator because its installation is simple, it is of low cost the advantages that, in more thunder heavy ice area It is widely used.
But practical operating experiences show, icing can make the electric field around insulator produce distortion, can cause when serious absolutely The generation of edge icing flashover accident, threatens the normal table operation of electric system.And the anti-icing anti-thunder insulator of tradition is just Often 95% power-frequency voltage is all added in the section of gap during operation, therefore when traditional anti-icing anti-thunder insulator positioned at heavy pollution area When running into serious icing situation, high voltage causes insulator that the failure of icing flashover easily occurs;It is in addition, existing in order to adapt to The size of 500kV electric power line pole towers, it is impossible to improve the ability of reply icing flashover by being lengthened to gap section.
Utility model content
Dodged for icing easily occurs existing for existing anti-icing anti-thunder insulator in the case of the regional and serious icing of heavy pollution Network, and the defects of cannot increase anti-icing anti-thunder insulator structure length to meet window size requirement, the utility model A kind of anti-icing anti-thunder insulator is provided.
Anti-icing anti-thunder insulator provided by the utility model, including gap section, in the first compound umbrella cover of gap section Portion is provided with first annular resistor disc, and plug passes through the centre bore of multiple first annular resistor discs.
The insulator further includes:Upper grading ring and lower uniform pressure ring;The upper grading ring is located at the described first compound umbrella cover Top, the upper grading ring is connected by upper grading ring connecting rod with the plug, and the upper grading ring is twin nuclei;Institute The lower section that lower uniform pressure ring is located at the described first compound umbrella cover is stated, the lower uniform pressure ring is connected by lower uniform pressure ring connecting rod and the plug Connect.
Wherein, the upper grading ring includes upper ring and lower ring and connecting bracket, and the upper ring is parallel with above and below the lower ring to be set Put, and the upper ring is connected with the lower ring by the connecting bracket.
The insulator further includes arcing horn, and the arcing horn is arranged on the lower end of the upper grading ring and described lower presses The upper end of ring.
The insulator further includes the lightning-arrest section positioned at gap section top, in the second compound umbrella cover of the lightning-arrest section Portion is provided with sleeve, and the second ring resistance piece and the bullet positioned at the second ring resistance piece top are provided with the sleeve Spring, the plug pass through the centre bore of multiple second ring resistance pieces.
The insulator further includes the upper end cover for being arranged at the sleeve upper end and the lower end for being arranged at the sleeve lower end Lid.
The insulator further includes the bowl head gold utensil for being arranged at the plug upper end and the ball for being arranged at the plug lower end Head gold utensil.
Wherein, the described first compound umbrella cover and the described second compound umbrella cover have the umbrella of umbrella footpath size difference and intersecting Skirt string.
Wherein, the first annular resistor disc and the second ring resistance piece are annular zinc oxide valve plate.
Wherein, the upper grading ring and the lower uniform pressure ring are aluminum, the arcing horn by aluminium weld respectively with it is described on Grading ring is connected with the lower uniform pressure ring.
Anti-icing anti-thunder insulator provided by the utility model, by gap section setting resistor disc, reduce gap Duan Cheng The ratio of voltage is carried on a shoulder pole, reduce further the maximum field strength of insulator, improves insulator reply heavy pollution area icing flashover Ability, and the tower window construction size requirement that is content with very little, so as to simple installation, reduce investment outlay.
Brief description of the drawings
In order to illustrate the embodiment of the utility model or the technical proposal in the existing technology more clearly, below will be to embodiment Or attached drawing needed to be used in the description of the prior art is briefly described, it should be apparent that, drawings in the following description are Some embodiments of the utility model, for those of ordinary skill in the art, without creative efforts, Other attached drawings can also be obtained according to these attached drawings.
Fig. 1 is the structure diagram for the anti-icing anti-thunder insulator that the utility model embodiment provides.
In figure, 1:Bowl head gold utensil;2:Sleeve;3:First compound umbrella cover;4:Upper grading ring connecting rod;5:Lower uniform pressure ring;6:Ball Head gold utensil;7:Upper end cover;8:Spring;9:Plug;10:First annular resistor disc;11:Upper grading ring;12:Arcing horn;13:It is lower equal Pressure ring connecting rod;14:Second ring resistance piece;15:Second compound umbrella cover;16:Bottom end cover.
Embodiment
It is new below in conjunction with this practicality to make the purpose, technical scheme and advantage of the utility model embodiment clearer Attached drawing in type embodiment, is explicitly described the technical scheme in the embodiment of the utility model, it is clear that described reality It is the utility model part of the embodiment to apply example, instead of all the embodiments.Based on the embodiment in the utility model, ability Domain those of ordinary skill all other embodiments obtained without making creative work, it is new to belong to this practicality The scope of type protection.
Hereinafter, by taking the anti-icing anti-thunder insulator suitable for the 500kV ultra-high-tension power transmission lines of multi-thunder area as an example, to this Utility model embodiment illustrates, but the protection domain not limited to this of the utility model embodiment;In order to facilitate description, hereafter Represented with " insulator " " anti-icing anti-thunder insulator ".
Fig. 1 is the structure diagram for the anti-icing anti-thunder insulator that the utility model embodiment provides, as shown in Figure 1, this is exhausted Edge attached bag includes gap section, and the first compound umbrella cover 3 of the gap section is internally provided with first annular resistor disc 10, and plug 9 passes through The centre bore of multiple first annular resistor discs 10.
Wherein, anti-icing anti-thunder insulator is installed on shaft tower, for suspending transmission pressure in midair;Gap section is one in insulator Part, for insulating, is alternatively referred to as insulating segment;Compound umbrella cover is usually by the insulation compound that is kneaded by particular manufacturing craft through rubber Glue vulcanization forms, it can be hollow cylindrical shape, for protecting plug;Plug is drawing-resistant function in insulator operational process The undertaker;Ring resistance piece can be loop configuration made of metal oxide, it is with good heat dissipation performance.
Specifically, in the insulator that the utility model embodiment provides, gap section includes the first compound umbrella cover 3 and first Ring resistance piece 10, plug 9 extend coaxially through the inside of the first compound umbrella cover 3, and are coaxially cased with being stacked on plug 9 Multiple first annular resistor discs 10 so that plug 9, the first compound umbrella cover 3 and 10 coaxial line of first annular resistor disc.And First annular resistor disc 10 can fill up the gap between 9 and first compound umbrella cover 3 of plug so that first annular 10 energy of resistor disc It is enough to be fixed.
During the use of conventional insulators, when circuit normal operation, insulator suspention transmission pressure simultaneously makes conducting wire Good insulation is kept between ground, the most of of line operating voltages is undertaken by gap section.And the utility model embodiment carries In the insulator of confession, since gap section adds first annular resistor disc 10, compared with conventional insulators, gap section undertakes Voltage ratio it is relatively low, so as to reduce the maximum field strength of insulator entirety.And since the maximum field strength of insulator is bigger, more Icing flashover failure easily occurs, therefore the insulator that the utility model embodiment provides can reduce insulation to a certain extent The risk of icing flashover occurs for son.
The utility model embodiment provide anti-icing anti-thunder insulator, by gap section setting resistor disc, between reducing Gap section undertakes the ratio of voltage, reduce further the maximum field strength of insulator, improves insulator reply heavy pollution area icing The ability of flashover, and the tower window construction size requirement that is content with very little, so as to simple installation, reduce investment outlay.
Based on above-described embodiment, grading ring 11 and lower uniform pressure ring 5 are further included;The upper grading ring 11 is located at described first The top of compound umbrella cover 3, the upper grading ring 11 is connected by upper grading ring connecting rod 4 with the plug 9, and the upper grading ring 11 be twin nuclei;The lower uniform pressure ring 5 is located at the lower section of the described first compound umbrella cover 3, and the lower uniform pressure ring 5 is pressed by lower Ring connecting rod 13 is connected with the plug 9.
Wherein, since the direct-to-ground capacitance of composite insulator is smaller, voltage's distribiuting is uneven, it is therefore desirable to which installing grading ring makes The voltage's distribiuting for obtaining insulator is more average;And grading ring can also play the role of striking, the electric discharge produced on circuit is dodged Network occurs between two rings, protects full skirt surface not burnt.
Specifically, on the top of gap section, i.e., the top of the first compound umbrella cover 3 can install grading ring 11, upper to press Ring 11 is connected with one end of upper grading ring connecting rod 4, and the other end of upper grading ring connecting rod 4 is connected with plug 9;Under the section of gap Portion, i.e., the lower section of the first compound umbrella cover 3 can install lower uniform pressure ring 5, one end phase of lower uniform pressure ring 5 and lower uniform pressure ring connecting rod 13 Even, the other end of lower uniform pressure ring connecting rod 13 can be connected by bottom plate with plug 9.
Based on above-described embodiment, the upper grading ring 11 includes upper ring and lower ring and connecting bracket, the upper ring and it is described under Ring is arranged in parallel up and down, and the upper ring is connected with the lower ring by the connecting bracket.Specifically, upper grading ring 11 is double Ring structure, including upper ring and a lower ring, upper ring and a lower ring are divided into two layers and are arranged in parallel, and are connected by connecting bracket and fixed.
Based on above-described embodiment, the insulator further includes arcing horn 12, and the arcing horn 12 is arranged on described upper press The lower end of ring 11 and the upper end of the lower uniform pressure ring 5.Wherein, arcing horn 12 is effective lightning protection component, both can be by lightning current Ground connection in time, and can be to user's uninterrupted power supply, so that playing prevents insulator surface flashover, protection electrical equipment and maintenance The effect of circuit normal operation.
Specifically, for traditional anti-icing anti-thunder insulators of 500kV in industrial frequency withstand voltage experiment, in gap section lower end and keep away The partial discharge phenomenon that thunder section occurs with gap section junction, the utility model embodiment improve the anti-icing lightning protection insulation of 500kV Minor structure.Twin nuclei is used in upper grading ring 11, while is added in the upper end of the lower end of upper grading ring 11 and lower uniform pressure ring 5 Arcing horn 12, further the uniform electric field in high field intensity region, secures discharge path, so as to add power frequency breakdown flashover electricity Pressure.
Based on above-described embodiment, the insulator further includes the lightning-arrest section positioned at gap section top, the lightning-arrest section The second compound umbrella cover 15 be internally provided with sleeve 2, the second ring resistance piece 14 is provided with the sleeve 2 and positioned at described The spring 8 on 14 top of second ring resistor disc, the plug 9 pass through the centre bore of multiple second ring resistance pieces 14.Specifically Ground, after Thunderstorm Weather occurs, after the voltage breakdown gap section that thunder and lightning produces, the second ring resistance piece 14 can absorb impact energy Amount clamps down on overvoltage, so as to protect whole insulator from flashover, to prevent to trigger line tripping accident.
Based on above-described embodiment, the insulator further includes the upper end cover 7 for being arranged at 2 upper end of sleeve and is arranged at institute State the bottom end cover 16 of 2 lower end of sleeve.Wherein, upper end cover 7 and bottom end cover 16 are used to seal the sleeve 2.
Based on above-described embodiment, the insulator further includes the bowl head gold utensil 1 for being arranged at 9 upper end of plug and is arranged at The bulb gold utensil 6 of 9 lower end of plug.Wherein, the bowl head gold utensil 1 for section of taking shelter from the thunder and the bulb gold utensil 6 of gap section are used for will insulation Son is connected with the miscellaneous part in power circuit.
Based on above-described embodiment, the first compound umbrella cover 3 and the described second compound umbrella cover 15 have umbrella footpath size difference And the full skirt string of intersecting.Specifically, it is above-mentioned to have umbrella footpath size different and hand over when insulator runs into sleet and snow ice weather The compound umbrella cover for the full skirt string that staggered floor is folded, big full skirt therein can play small full skirt good bridging effect, whereby can be to prevent Only bridged between umbrella, prevent serious icing snowberg and retardance electric arc concatenation, so as to effectively delay the ice slush bridge of the insulator The time is connect, increases the difficulty of its flashover, substantially reduces the probability of line tripping under freezing weather.
Based on above-described embodiment, the first annular 10 and second ring resistance piece 14 of resistor disc is annular zinc oxide valve Piece.Annular zinc oxide valve plate function admirable, has good heat dissipation performance.
Based on above-described embodiment, the upper grading ring 11 and the lower uniform pressure ring 5 are aluminum, and the arcing horn 12 passes through aluminium Weldering is connected with the upper grading ring 11 and the lower uniform pressure ring 5 respectively.Wherein, the preferred material of upper grading ring 11 and lower uniform pressure ring 5 Expect for aluminum or aluminum alloy.
The composition for each component of insulator that above-described embodiment illustrated below provides, but the model of the utility model embodiment Enclose not limited to this.Bowl head gold utensil 1, upper grading ring connecting rod 4, lower uniform pressure ring 5, upper end cover 7 and upper grading ring 11 can be iron plating Zinc part;The bowl head gold utensil 1 of lightning-arrest section and the bulb gold utensil 6 of gap section can use pin ball, cap nest structural shape, by cambered surface to Heart iso-stress is withheld in anti-icing 9 termination of anti-thunder insulator plug;Upper grading ring 11 is fixed on plug 9 by upper grading ring connecting rod 4 On;Ring resistance piece 10 can use the zinc oxide valve plate of annular;The sleeve 2 of lightning-arrest section can use epoxy glass fiber to justify Cylinder;Plug 9 is high-strength corrosion-resistant epoxy glass fiber rod;First compound 3 and second compound umbrella cover 15 of umbrella cover uses methyl The high-temperature silicon disulfide rubber of vinylsiloxane rubber addition compounding agent is made.Above-mentioned all components can be in market purchasing or domestic system Factory's processing and fabricating is made, according to above-mentioned embodiment, and the structure shown in 1 is assembled referring to the drawings, can be met The insulator of use condition.
1 gap of table section resistor disc diameter influences field strength distribution
The gap section resistor disc diameter that table 1 is shown influences field strength distribution, the wherein gap Duan Wu electricity of conventional insulators Hinder piece, its resistor disc a diameter of 0;The insulator that the utility model embodiment provides is novel insulator, and table 1 shows gap section 5 groups of data between a diameter of 20mm~100mm of resistor disc.It is exhausted with tradition wherein as a diameter of 40mm of gap section resistor disc Edge is compared, and the voltage ratio that gap section undertakes is reduced to 62% by 90%, and maximum field strength is reduced to 19.8kV/cm by 30.5kV/cm, The voltage that section of taking shelter from the thunder at this time is shared is 38%, and the voltage that lightning-arrest section undertakes is more reasonable.
Therefore, after using the structure, the voltage ratio that gap section undertakes reduces.The anti-icing anti-thunder insulators of traditional 500kV It is respectively 495kV and 341kV that anti-thunder insulator gap section anti-icing with new 500kV, which undertakes voltage,.And due to breakdown voltage and length Degree is positively correlated, thus after gap section undertakes voltage and reduces, it may be considered that further reduce the entirety of anti-icing anti-thunder insulator Structure height, drops to below 4.8m, to meet window size requirement by the anti-icing anti-thunder insulator structure lengths of 500kV.
In conclusion the anti-icing anti-thunder insulator that the utility model embodiment provides, for suspending transmission pressure in midair, can bear Larger load;Compared to traditional anti-icing anti-thunder insulators of 500kV, the anti-icing lightning protection insulation that the utility model embodiment provides The voltage that the gap section of son undertakes have dropped 1/3, and maximum field strength reduces 1/3, be covered so as to improve the reply of 500kV transmission lines of electricity The ability of ice flashover, pollution flashover and lightning stroke trip failure, improves flashover voltage;Insulator uses twin nuclei and arcing horn Design, has been evenly arranged local high field intensity region field strength distribution, has limited discharge path, protects its full skirt from electric arc burn, Dielectric strength is unaffected after lightning stroke;After the voltage ratio that gap section undertakes reduces, it is exhausted further to reduce the anti-icing lightning protection of 500kV The structure height of edge, further meets window size requirement;Anti-icing anti-thunder insulator insulating coating is using abundant umbellate form Mode that structure and size full skirt interlock is, it can be achieved that anti-ice-flashing function under low temperature sleet and snow ice weather.
Finally it should be noted that:Above example is only to illustrate the technical solution of the utility model, rather than its limitations; Although the utility model is described in detail with reference to the foregoing embodiments, it will be understood by those of ordinary skill in the art that: It can still modify the technical solution described in foregoing embodiments, or which part technical characteristic is carried out etc. With replacement;And these modifications or replacement, the essence of appropriate technical solution is departed from various embodiments of the utility model technology The spirit and scope of scheme.

Claims (10)

1. a kind of anti-icing anti-thunder insulator, it is characterised in that including gap section, set inside the first compound umbrella cover of the gap section First annular resistor disc is equipped with, plug passes through the centre bore of multiple first annular resistor discs.
2. insulator according to claim 1, it is characterised in that further include:Upper grading ring and lower uniform pressure ring;
The upper grading ring is located at the top of the described first compound umbrella cover, the upper grading ring by upper grading ring connecting rod with it is described Plug connects, and the upper grading ring is twin nuclei;
The lower uniform pressure ring is located at the lower section of the described first compound umbrella cover, the lower uniform pressure ring by lower uniform pressure ring connecting rod with it is described Plug connects.
3. insulator according to claim 2, it is characterised in that the upper grading ring includes upper ring and lower ring and connection branch Frame, the upper ring and the lower ring are arranged in parallel up and down, and the upper ring is connected with the lower ring by the connecting bracket.
4. the insulator according to Claims 2 or 3, it is characterised in that further include arcing horn, the arcing horn is arranged on institute State the lower end of grading ring and the upper end of the lower uniform pressure ring.
5. insulator according to claim 1, it is characterised in that the lightning-arrest section positioned at gap section top is further included, Second compound umbrella cover of the lightning-arrest section is internally provided with sleeve, the second ring resistance piece is provided with the sleeve and positioned at institute The spring on the second ring resistance piece top is stated, the plug passes through the centre bore of multiple second ring resistance pieces.
6. insulator according to claim 5, it is characterised in that further include be arranged at the sleeve upper end upper end cover and It is arranged at the bottom end cover of the sleeve lower end.
7. insulator according to claim 1 or 5, it is characterised in that further include the bowl head for being arranged at the plug upper end Gold utensil and the bulb gold utensil for being arranged at the plug lower end.
8. insulator according to claim 5, it is characterised in that the first compound umbrella cover and the second compound umbrella cover The different and full skirt string of intersecting with umbrella footpath size.
9. insulator according to claim 5, it is characterised in that the first annular resistor disc and second annular electro It is annular zinc oxide valve plate to hinder piece.
10. insulator according to claim 4, it is characterised in that the upper grading ring and the lower uniform pressure ring are aluminum, The arcing horn is connected with the upper grading ring and the lower uniform pressure ring respectively by aluminium weldering.
CN201720878032.0U 2017-07-19 2017-07-19 A kind of anti-icing anti-thunder insulator Active CN207302760U (en)

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Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN111431129A (en) * 2020-05-08 2020-07-17 湖南省湘电试研技术有限公司 Transmission line without lightning conductor

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN111431129A (en) * 2020-05-08 2020-07-17 湖南省湘电试研技术有限公司 Transmission line without lightning conductor

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