CN202601330U

CN202601330U - Compound suspension insulator

Info

Publication number: CN202601330U
Application number: CN 201220212645
Authority: CN
Inventors: 李太旭
Original assignee: Individual
Current assignee: Individual
Priority date: 2012-05-15
Filing date: 2012-05-15
Publication date: 2012-12-12
Anticipated expiration: 2022-05-15

Abstract

The utility model relates to a compound suspension insulator which is applied to various high-voltage lines, and has better creepage performance and breakdown-preventing performance on an ultra-high voltage line. The compound suspension insulator comprises an upper armour clamp, a lower armour clamp, a porcelain insulator, an adhering agent layer and a silicon rubber protective layer, wherein the porcelain insulator comprises a columnar porcelain core and an umbrella surface formed on the bottom of the columnar porcelain core; the upper armour clamp, the lower armour clamp and the porcelain insulator are connected together through the adhering layer and a locking pin, and the silicon rubber protective layer is arranged on the outer surface of the porcelain layer. The compound suspension insulator is characterized in that a circle of beads is arranged on the lower surface of the umbrella surface in the porcelain insulator. Preferably, the center of a circle of the beads is coincident with the center of a circle of the umbrella surface and the radius of the beads is less than the umbrella diameter of the umbrella surface. Preferably, the length of the umbrella diameter of the umbrella surface in the porcelain insulator is about equal to the length of the radius of the lower bottom surface of the compound suspension insulator.

Description

A kind of compound suspension insulator

Technical field

The utility model relates to the insulator that uses in a kind of high pressure confession power transformation circuit, relates in particular to a kind of compound suspension insulator.

Background technology

Present widely used cap and pin insulator mainly is the porcelain insulating parts of a large amount of uses and the insulator of gold utensil composition and a small amount of porcelain composite members of using and gold utensil composition, and these two kinds of insulators in use all expose certain defective.Porcelain insulator is relatively poor because of its clean surfaces performance, is prone to long-pending dirt and causes the surface insulation ability to reduce, and therefore needs cleaning regularly; The porcelain composite insulator that uses at present is less because of its inner porcelain spare surface creepage distance again; Because of the insulation property of porcelain silica gel binding agent far below porcelain; Can cause under the high pressure along porcelain silica gel tack coat to puncture and reduction proof voltage level, can't on the voltage levels circuit, use.China utility model patent ZL02269481.1 discloses a kind of compound suspension insulator, and is as shown in Figure 1, and this insulator is by last gold utensil 1, gold utensil 2 down, and porcelain insulating spare 3, adhesive phase 4 and silicon rubber sheath 6 are formed.Integrally combine as skeleton with porcelain insulating spare 3 through

gold utensil

1,2 about adhesive phase 4 and gold utensil pull bar 8 or the locking pin general.For creepage ability and the blowdown performance that increases this insulator, by its shape silicon rubber sheath 6 is set at the exposed surface of porcelain insulating spare 3.Usually, this porcelain insulating spare 3 comprises a cylindricality porcelain core 31 and the umbrella cover 32 that forms in this cylindricality porcelain core bottom, and this umbrella cover has umbrella footpath d.

But in actual use; Because the different and creepage performance of the external shape of compound suspension insulator own is different; Need be applied under the environment of various mechanical strength classes and electric pressure, only by its shape the silicon rubber sheath is set and meet the demands far away at the exposed surface of porcelain insulating spare.In addition, because silicon rubber insulating sheath performance is far below porcelain, superhigh pressure can cause the porcelain insulating spare in its centre breakdown and reduce the proof voltage level down, can't on extra-high pressure grade circuit, use.

Again, d is less with respect to the radius M of compound suspension insulator bottom surface (this bottom surface is a disc usually) in umbrella cover umbrella in existing porcelain insulating spare footpath, only account for usually its 1/2.Because the umbrella of this porcelain insulating spare footpath is less, makes that the resistance to sparking of this porcelain insulating spare can be not high, whole creepage performance is not high.

The utility model content

To deficiency of the prior art, the utility model aims to provide a kind of compound suspension insulator, and this kind insulator is applied on the various high pressure grade circuits, especially has better creepage performance and anti-breakdown performance on the superhigh pressure grade circuit.

In order to address the above problem, a kind of compound suspension insulator of the utility model comprises: go up gold utensil, following gold utensil, porcelain insulating spare, adhesive phase and silicon rubber sheath, this porcelain insulating spare comprise cylindricality porcelain core and the umbrella cover that forms in this cylindricality porcelain core bottom; Last gold utensil, following gold utensil and porcelain insulating spare link together through adhesive phase and locking pin; The outer surface of porcelain insulating spare is provided with the silicon rubber sheath, and this compound suspension insulator is characterised in that: the lower surface of the umbrella cover in the said porcelain insulating spare is provided with a circle fin.

Preferably, the center of circle of said fin overlap with the center of circle of said umbrella cover and the radius of this fin less than the umbrella footpath of said umbrella cover.

Preferably, the radius of said fin is 1/3 to 2/3 of said umbrella cover umbrella footpath.

Preferably, in the said porcelain insulating spare length in the umbrella of umbrella cover footpath be this compound suspension insulator the bottom surface radius length 2/3 to 9/10.

Preferably, the length in the umbrella of umbrella cover footpath approximates the bottom surface radius length of this compound suspension insulator in the said porcelain insulating spare.

Preferably, be provided with porcelain silica gel bonding agent between the outer surface of said porcelain insulating spare and the said silicon rubber sheath.

Preferably, said adhesive phase is the inorganic adhesive layer.

This NEW TYPE OF COMPOSITE suspension insulator is owing to be provided with fin at porcelain insulating spare lower surface; Increased the umbrella cover sectional thickness of porcelain insulating spare and made the overall structure of umbrella cover more firm; Itself creepage distance increases, and because of the surperficial withstand voltage of design is higher than the withstand voltage of porcelain head, has so just avoided the puncture of porcelain silica gel adhesive layer; Guarantee the whole withstand voltage level of product, made full use of the high advantage of porcelain body dielectric strength; Appearance sticking silica gel layer because of its good anti-pollution type can with the characteristics that are easy to be shaped, can guarantee product have good anti-pollution type can with the requirement of satisfying various gradation for surface pollution, guaranteed the safe operation of transmission line.

Description of drawings

Fig. 1 is the structure half sectional view of compound suspension insulator of the prior art;

Fig. 2 is the structure half sectional view of the compound suspension insulator of plain edition in the utility model;

Fig. 3 is the structure half sectional view of the compound suspension insulator of two umbellate forms in the utility model;

Fig. 4 is the structure half sectional view of the compound suspension insulator of three umbellate forms in the utility model;

Fig. 5 is the structure half sectional view of the compound suspension insulator of bell jar type in the utility model.

Embodiment

Below in conjunction with accompanying drawing the utility model is done explanation further.

In conjunction with Fig. 2 to Fig. 5; The combined type insulator of the utility model according to from 1 kilovolt to 1000 kilovolts each different voltages with different grade of AC and DC, adopt 70,120,160,210,300,420 respectively, the porcelain spare compound silica gel material of the respective diameters of 550kN grade forms the various strength grades of common umbellate form, two umbellate form, three umbellate forms and bell jar umbellate form and the product of various gradation for surface pollution, to meet the different needs.The insulator structure of these types is similar, only elaborates with a kind of combined type insulator at present.

As shown in Figure 2, this figure is the structure half sectional view of the compound suspension insulator of plain edition.This compound suspension insulator comprises: go up gold utensil 1, following gold utensil 2, porcelain insulating spare 3, adhesive phase 4 and silicon rubber sheath 6, this porcelain insulating spare 3 comprise cylindricality porcelain core 31 and the umbrella cover 32 that forms in this cylindricality porcelain core bottom.This umbrella cover 32 has center of circle o.Last gold utensil 1, gold utensil 2 and porcelain insulating spare 3 link together through adhesive phase 4 and locking pin down, are coated with silicon rubber sheath 6 on the outer surface of porcelain insulating spare 3.Here, said adhesive phase 4 is preferably the inorganic adhesive layer.Umbrella cover 32 upper and lower surfaces of this porcelain insulating spare 3 are inclined-planes, and the edge rounding off is provided with a circle at the lower surface suitable position and strengthens straightedge, be i.e. fin 321 among the figure.Concrete, the radius D1 of the identical and fin 321 of the center of circle o of the center of circle of this fin 321 and said umbrella cover is less than the umbrella of said umbrella cover D directly, and promptly this fin 321 is arranged between the center of circle o and edge of umbrella cover.More preferably, the radius D1 of said fin 321 is 1/3 to 2/3 of said umbrella cover umbrella footpath D.Through the lower surface at umbrella cover one circle fin is set, makes the porcelain insulating spare 3 of this insulator keep suitable creepage distance, make its surface breakdown voltage be higher than the porcelain head puncture voltage, composite bed is unlikely breakdown.

In addition; Umbrella footpath is taken all factors into consideration according to the withstand voltage level of the requirement of different mechanical strength classes, electric pressure and porcelain silica gel binding agent, silicon rubber sheath; Be designed to different sizes, usually, as shown in Figure 1; If the umbrella of umbrella cover 32 footpath d has certain-length in the porcelain insulating spare 3 of the prior art, the length of umbrella cover umbrella footpath D is 2 to 3 times of length of umbrella cover umbrella footpath d in the existing porcelain insulating spare 3 in the porcelain insulating spare in the utility model 3 so.Promptly; The length of the umbrella of umbrella cover 32 footpath D approximates or is slightly less than the bottom surface radius M length of the compound suspension insulator in the utility model in the said porcelain insulating spare 3, the length of the umbrella footpath D of this umbrella cover 32 also can be compound suspension insulator bottom surface radius M length 2/3 to 9/10.Through the length in the umbrella cover umbrella footpath in the lengthening porcelain insulating spare 3, further strengthened the creepage performance of this insulator.

Be provided with porcelain silica gel bonding agent 5 between the outer surface of said porcelain insulating spare 3 and the said silicon rubber sheath 6.Make the porcelain spare and the connecting portion of gold utensil adopt whole sealing modes, in the long-time running process, cause the aging of insulator because of moisture expantion to prevent adhesive.

Claims

1. compound suspension insulator; Comprise: go up gold utensil (1), following gold utensil (2); Porcelain insulating spare (3), adhesive phase (4) and silicon rubber sheath (6), this porcelain insulating spare (3) comprise cylindricality porcelain core (31) and the umbrella cover (32) that forms in this cylindricality porcelain core bottom; Last gold utensil (1), following gold utensil (2) and porcelain insulating spare (3) link together through adhesive phase (4) and locking pin; The outer surface of porcelain insulating spare (3) is provided with silicon rubber sheath (6), and this compound suspension insulator is characterised in that: the lower surface of the umbrella cover (32) in the said porcelain insulating spare (3) is provided with a circle fin (321).

2. compound suspension insulator according to claim 1 is characterized in that: the center of circle of said fin (321) overlap with the center of circle (o) of said umbrella cover (32) and the radius (D1) of this fin (321) less than the umbrella footpath (D) of said umbrella cover.

3. compound suspension insulator according to claim 2 is characterized in that: the radius (D1) of said fin (321) is 1/3 to 2/3 of said umbrella cover umbrella footpath (D).

4. compound suspension insulator according to claim 1 is characterized in that: the length in the umbrella of umbrella cover (32) footpath (D) is 2/3 to 9/10 of bottom surface radius (M) length of this compound suspension insulator in the said porcelain insulating spare (3).

5. compound suspension insulator according to claim 1 is characterized in that: the length in the umbrella of umbrella cover (32) footpath (D) approximates bottom surface radius (M) length of this compound suspension insulator in the said porcelain insulating spare (3).

6. compound suspension insulator according to claim 1 is characterized in that: be provided with porcelain silica gel bonding agent between the outer surface of said porcelain insulating spare (3) and the said silicon rubber sheath (6).

7. compound suspension insulator according to claim 1 is characterized in that: said adhesive phase (4) is the inorganic adhesive layer.