CN202034132U - Strut insulator of electric appliance for electric station with ultra-large creepage distance - Google Patents

Abstract

The utility model relates to a strut insulator of an electric appliance for an electric station with an ultra-large creepage distance, which is structurally formed by binding an insulating porcelain member, an upper metal accessory and a lower metal accessory by using cement binding agents. The inside of a main body of the insulating porcelain member is hollow; the appearance of the porcelain member adopts a structure with alternate big umbrellas and small umbrellas from top to bottom; the structure has an ultra-large creepage distance requirement in a certain insulation distance; and a nominal specific leakage distance is up to 40 mm/kV. The insulator adopts the parameters of the structure with the big umbrellas and the small umbrellas distributed reasonably; the structure of the insulator is compact; and further, the inclination of the angles of the umbrellas is reasonable and properly sparse. The insulator with the structure has quite wide application districts, is applicable to places which are quite near a coast and are suffered from the actions of sea fog or strong contaminative sea wind perennially, is applicable to high-altitude regions with extremely atrocious weather and environment conditions, and is applicable to desert regions which have no rain for a long time and are subjected to the action of strong wind with sand and salt.

Description

Super large creepage distance power station electrical appliance post insulator

[technical field] the utility model relates to a kind of power station electrical appliance post insulator, and the super large creepage distance power station electrical appliance that particularly relates to heavy pollution areas such as being used for coastal, desert and plateau thereof is with post insulator (hereinafter to be referred as insulator).

[background technology] along with the steady growth of China's economy, and power industry is high speed development thereupon also.Especially the enforcement of strategy to develop western regions, present electrical network power transmission and transformation ability can not satisfy the needs of the national economic development and living standards of the people far away.Stepping up to implement ultra high voltage, remote, big capacity, low-loss transmission of electricity is the inexorable trend of China's electric power industry development.

For transmission system, reliability and economy are the subject matter of system design.And transformer station is the hinge of power transmission system, and power station electrical appliance insulator is the important component part of this hinge.This insulator is not only bearing lasting mechanical stress, electric stress, the infringement of also bearing natural environments such as filth, thunderbolt, high wind in running.So, the design that is applicable to the insulator under the adverse circumstances such as high height above sea level, heavy pollution for set up advanced technology, reliable, economic electric power system has far-reaching and significant meaning.

[summary of the invention] the utility model has overcome the deficiency of prior art, and its purpose is to provide a kind of rational, effective super large creepage distance power station electrical appliance post insulator.The umbrella-shaped structure of this insulator has improved the pollution performance of insulator greatly in fixed insulation distance, increased the creepage distance of insulator, reaches the creepage ratio of nominal apart from the 40mm/kV requirement.

Above-mentioned purpose of the present utility model is achieved through the following technical solutions.

A kind of super large creepage distance power station electrical appliance post insulator, its structure is that insulating porcelain piece and upper and lower metal-ware form with the cement glue mucilage binding, it is characterized in that this insulating porcelain piece body interior is hollow, porcelain spare profile is for adopting big umbellule alternating structure from top to bottom.The umbrella-shaped structure of this insulator has improved the pollution performance of insulator greatly in certain insulation distance, increased the creepage distance of insulator, reaches the creepage ratio of nominal apart from the 40mm/kV requirement.

The porcelain spare of above-mentioned insulator preferably adopts cylindrical structural.And the beveled structure section coefficient of porcelain spare is:

The umbrella spacing is controlled within 0.65～0.8 with the ratio S/P that umbrella stretches out;

The upper surface inclination angle of umbrella is α=15～20 °;

The lower surface inclination angle of umbrella is β=8～13 °;

Gamp extension elongation P is 86～106 millimeters.

The best beveled structure section coefficient of the porcelain spare of above-mentioned insulator is:

The ratio that umbrella spacing and umbrella stretch out: S/P=0.76;

The upper surface inclination angle of umbrella is α=18 °;

The lower surface inclination angle of umbrella is β=12 °;

Gamp extension elongation P=96 millimeter.

The porcelain spare of above-mentioned insulator preferably adopts high-strength aluminium matter ceramic material to make.

Operation test proves that the dirty performance of the resistant of insulator depends primarily on the structure and the creepage distance of this insulator, and creepage distance is determined by rational umbrella-shaped structure.So under the certain situation of insulator structure, the dirty performance of the resistant of insulator depends primarily on the insulator umbrella-shaped structure.

The design of the utility model insulator umbrella shape mainly takes big umbellule alternately, and the beveled structure of continuous distribution.The advantage of this umbrella shape is, umbellule is under the protection of gamp not vulnerable to pollution, and between two gamps across umbellule, increased the distance between gamp, improved flash-over characteristic between umbrella, thereby improved the dirty performance of resistant of insulator.

The umbrella-shaped structure of the utility model insulator is further to increase umbrella to stretch out (P) on the basis of original big or small umbrella shape, makes it be reached for 86～106 millimeters, and shortens the umbrella spacing simultaneously, and S/P=0.76＜0.8 is realized.Like this, just can in limited insulation distance, realize the requirement of super large creepage distance.

Yet dwindling of the ratio that umbrella spacing and umbrella stretch out (S/P) can bring very big trouble to making, even can't realize.In order to solve the problem of this respect, just must reasonably adjust other parameters of beveled structure, adjust umbrella edge angular radius and be reduced to R4 by R5; Simultaneously, adjust umbrella lower surface inclination angle and increase to 12 ° by 10 °.Like this, make the umbrella attenuation, the space between adjacent big umbellule is strengthened, and is convenient to processing.On this basis, also must develop special-purpose length and thin fettling knife, finish the making of this umbrella shape.

The super large creepage distance power station electrical appliance post insulator that the utility model is introduced has utilized the advantage of the dirty big or small umbrella-shaped structure of original resistant, and has carried out the adjustment of partial parameters.Adjusted umbellate form, rational in infrastructure, feasible process, and have the characteristic of anti-severe filth.Can be widely used in the filthy area of severe of meteorology such as high height above sea level, high salt fog and environmental condition very severe.

[description of drawings] Fig. 1 is the utility model insulator cross-sectional view.

Fig. 2 is the utility model insulating part beveled structure profile.

The common insulating part beveled structure of Fig. 3 profile.

Symbol description among the figure: 1, go up metal-ware; 2, cement glue; 3, asphalt caulk; 4, silicone rubber coating; 5, insulating porcelain piece; 6, following metal-ware.

[embodiment] introduces the utility model insulator specific embodiments in detail below in conjunction with accompanying drawing.

As shown in Figure 1, a kind of novel super large creepage distance power station electrical appliance post insulator that the present embodiment is introduced mainly is made up of last metal-ware 1, insulating porcelain piece 5, following metal-ware 6.Be coated with one deck asphalt caulk 3 behind the special porcelain sand of the surperficial last layer that the two ends of insulating porcelain piece 5 contact with cement glue 2, reach metal-ware 6 usefulness cement glue glue 2 to dress up one itself and last metal-ware 1 again, be coated with one deck silicone rubber coating 4 at the cement glue exposed face at last.

According to shown in Figure 2, the umbrella-shaped structure of the utility model insulator possesses following technical parameter:

1. the ratio that stretches out of umbrella spacing and umbrella: S/P=0.76

2. the upper surface inclination angle of umbrella: α=18 °

3. the lower surface inclination angle of umbrella: β=12 °

Figure 3 shows that the profile of the beveled structure figure that the common size umbrella is alternate.

By the contrast of Fig. 2, Fig. 3, can obtain:

1. umbrella stretches out the ratio that P=96＞P '=75, umbrella spacing and umbrella stretch out: S/P=0.76＜S '/P '=0.90.Stretch out by increasing umbrella, dwindle the requirement that recently realizes the super large creepage distance that umbrella spacing and umbrella stretch out.

2. umbrella angle of declination β=12 °＞β '=10 °, umbrella edge angle R '=5＞R '=4.Make the umbrella attenuation, increase the umbrella angle by reducing umbrella edge angle, increase the spacing between adjacent two umbrellas, be convenient to processing, realize technological feasibility.

That is to say that the utility model insulator is by to the redesign of each parameter of beveled structure, reasonably adjust.It is reached satisfies the super large creepage distance, and be convenient to produce, have anti-severe filthy characteristic again, can be widely used in the requirement of insulator in the filthy area of severe of meteorology such as high height above sea level, high salt fog and environmental condition very severe.

Claims (5)

1. super large creepage distance power station electrical appliance post insulator, its structure is that insulating porcelain piece [5] forms with the cement glue mucilage binding with upper and lower metal-ware [1,6], it is characterized in that this insulating porcelain piece [5] body interior is hollow, porcelain spare [5] profile is for adopting big umbellule alternating structure from top to bottom.

2. insulator according to claim 1 is characterized in that said porcelain spare [5] adopts cylindrical structural.

3. insulator according to claim 1 and 2 is characterized in that the beveled structure section coefficient of said porcelain spare [5] is:

The umbrella spacing is controlled within 0.65～0.8 with the ratio S/P that umbrella stretches out;

The upper surface inclination angle of umbrella is α=15～20 °;

The lower surface inclination angle of umbrella is β=8～13 °;

Gamp extension elongation P is 86～106 millimeters.

4. insulator according to claim 3 is characterized in that the beveled structure section coefficient of said porcelain spare [5] is:

The ratio that umbrella spacing and umbrella stretch out: S/P=0.76;

The upper surface inclination angle of umbrella is α=18 °;

The lower surface inclination angle of umbrella is β=12 °;

Gamp extension elongation P=96 millimeter.

5. according to claim 1,2 or 4 described insulators, it is characterized in that said porcelain spare [5] adopts high-strength aluminium matter ceramic material to make.

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