JPH09320342A - High voltage equipment part for power transmission line - Google Patents

Abstract

PROBLEM TO BE SOLVED: To provide a high voltage equipment part using an electric insulating part which has a high impact resistance, and a light weight, and does not reduce a high voltage electric insulating property such as the antitracking property and the antierosion property for a long period. SOLUTION: This part 1 is composed by providing an electric insulating part 2 made of silicon rubber. In this case, this electric insulating part 2 is composed of silicone rubber compact which is formed by forming a liquid composition including specific amounts of (A) organopolysiloxane, (B) a minute particle form silica, (C) zinc hydroxide powder or basic zinc hydroxide, (D) organohydrodiene polysiloxane, and (E) a catalyst for hydrosilic reaction, respectively, and a silicone insulator is formed by molding the silicon rubber compact 2 provided on the periphery of an FRP rod arranging grip metal fittings 4 and 4 at both ends, for example, which is used as a holding insulator and the like of a high voltage wire.

Description

Detailed Description of the Invention

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to an insulator, an insulator tube, a bushing, which is equipped with an electrically insulating component made of silicone rubber.
The present invention relates to high voltage equipment parts for power transmission / distribution / transformation or railways (hereinafter collectively referred to as power transmission lines) such as cable terminal connections, arresters, switches, circuit breakers, cutouts and interphase spacers.

[0002]

2. Description of the Related Art High-voltage equipment parts used for overhead power transmission lines, distribution lines, substations, railway lines, etc., which are directly exposed to the outdoors,
For example, porcelain electrically insulating structural parts (electrically insulating parts) that are not easily deteriorated electrically and mechanically have been used for parts such as insulators, insulators, spacers and bushings (eg insulator caps). However, since the specific gravity of porcelain is large and the product itself becomes heavy, if it is used as a support insulator or spacer for electric wires, the strength of the steel tower will be limited and the size of the supporting member will be limited, so the transmission line including the steel tower will be limited. There is a drawback that it hinders the space occupied by the occupants from becoming compact and spoils the aesthetics. In addition, when a tracking phenomenon (a phenomenon in which a leakage path is generated on the surface of an insulator) occurs, various problems occur because the porcelain itself is hard and brittle. For example, if an air flashover occurs on the outside of the insulator, the impact of the electric energy will cause the insulator to break and the parts will fall from the tower. Similarly, in a porcelain tube with a built-in arrester element, the element may penetrate when absorbing an excessive lightning surge, or the air in the gap between the element and the porcelain tube may explode or explode due to the energy at the time of a flashover on the outside of the element. There is a problem that the insulator is scattered.

From such a background, it has been previously studied to use a polymer material having relatively high impact resistance and light weight as a substitute for porcelain. Specifically, the use of cross-linked elastomers containing polyolefin-based polymer materials such as ethylene-propylene-diene terpolymer (EPDM) and ethylene-vinyl acetate copolymer (EVA) or silicone rubber as a main component is considered. Has been done. Generally, a molded article made of a polymer material exhibits water repellency at the initial stage, but when it is used outdoors, it loses its water repellency in a relatively short period of time by irradiation with sunlight (ultraviolet rays). There is. On the other hand, it is known that fluororesins, silicone rubbers, and silicone resins represented by Teflon are resistant to ultraviolet rays. Furthermore, when silicone rubber is used as a skin material for high-voltage insulators, etc., even if the surface is exposed to partial discharge or contaminants are attached to the surface, the water repellency is temporarily lost, After that, it is known that the water repellency is recovered in about ten hours to several days. With such characteristics, the silicone rubber can be an electrically insulating component suitable for outdoor applications that exhibits excellent insulating performance under severe exposure conditions.

Although the whole mechanism of the water repellency of the silicone rubber is not yet clarified, it is because the low molecular weight silicone component contained in the silicone rubber oozes out on the surface over time. It is believed that. JP-A-7-57574 and JP-B-6
In JP-A 2-60794, by intentionally blending a low-molecular-weight silicone component and achieving continuous migration of the low-molecular-weight silicone component, recovery characteristics relating to electrical resistance characteristics such as water repellency and tracking resistance are improved. Insulators and high voltage insulated connections are disclosed. However, in the above method, the electric resistance is recovered with the passage of time, and the tracking resistance of the silicone rubber itself has not been improved.Therefore, there is a problem that it does not exhibit its effect when it is rapidly polluted by a typhoon or the like. there were. Further, the intentionally blended low-molecular-weight silicone component is expected to be depleted over the years of use.

Japanese Patent Publication No. 5-12805 discloses a one-part type room temperature curable silicone composition which is cured on the surface of glass, porcelain or polymer composite insulator to form an arc resistant and hydrophobic film on the surface. By doing so, an insulator improved so as to have resistance to various stresses imposed on an electric insulator used outdoors is disclosed. However, since the method of this example uses a one-component type, that is, a room temperature curable silicone composition that cures by a condensation reaction, it takes a long time to cure the composition, and the mechanical properties of the cured product itself are high. There is a drawback that the dynamic strength is small. In addition, since water repellency is imparted by forming a film, it cannot be expected to maintain the water repellency recovery property for a long period of time. further,
If the insulator body is made of glass or porcelain, the problem of hindering downsizing of the power transmission line cannot be solved. Japanese Patent Laid-Open No. Hei 4
According to JP-A-209655, by adding 15 to 300 parts by weight of aluminum hydroxide to 100 parts by weight of organopolysiloxane without adding a platinum catalyst, weather resistance, erosion resistance and resistance after heat curing are improved. A silicone rubber composition excellent in high voltage electrical insulation properties such as tracking property and arc resistance is disclosed. In this example, when the silicone rubber (organopolysiloxane elastomer) contains a platinum catalyst, the conventional problem of localized erosion phenomenon occurs, so in order to avoid the conventional problem of curing (vulcanization) by an addition reaction with a platinum catalyst, Instead, a curing method using organic peroxide is adopted. However, this organic peroxide-curing composition has a slow start-up of the curing reaction, so it is practically used for molded products such as insulators / insulator tubes with complicated shapes and long interphase spacers where temperature distribution is likely to occur in the mold. There is a problem that it is unsuitable for people.

[0006]

As described above,
Has moldability suitable for parts with complex shapes and long parts,
In addition, electrical insulation made of silicone rubber that can maintain high-voltage electrical insulation properties such as weather resistance, erosion resistance, tracking resistance, and arc resistance under conditions exposed to severe pollution or severe weather for a long period of time. Insulation components have not been obtained with the prior art. The present invention provides a high-voltage equipment component for a transmission line using an electrical insulation component that has high impact resistance and is lightweight, and high voltage electrical insulation characteristics such as tracking resistance and erosion resistance do not deteriorate over a long period of time. The purpose is to

[0007]

The object of the present invention has been achieved by the following high voltage equipment parts for power transmission lines of the present invention. That is, according to the first invention of the present application, in a high-voltage equipment component for a transmission line, which comprises an electrically insulating component made of silicone rubber, the electrically insulating component is (A) at least two silicon atom-bonded alkenyls in one molecule. Organopolysiloxane having a group and a viscosity at 25 ° C. of 100 to 100,000 centistokes 100 parts by weight (B) finely powdered silica 1 to 60 parts by weight (C) zinc carbonate powder or basic zinc carbonate powder 1 ˜200 parts by weight (D) Organohydrogenpolysiloxane having at least two silicon-bonded hydrogen atoms in one molecule [the amount of this component is the number of moles of silicon-bonded hydrogen atoms in the composition (A The ratio of the number of moles of silicon-bonded alkenyl groups in component () is from (0.5: 1) to (20: 1). ] And (E) Catalyst for hydrosilylation reaction A high-voltage equipment component for a power transmission line, comprising a silicone rubber molded product obtained by molding a liquid composition containing a catalytic amount into a predetermined shape and curing the liquid composition. Further, as a second invention, the liquid composition is a liquid composition containing (F) aluminum hydroxide powder in an amount of 1 to 200 parts by weight in addition to the components (A) to (E). To provide high voltage equipment parts for power transmission lines. Also, as a third invention,
In the liquid composition, the components (A) to (E) or the components (A) to (F) are further added, and (G) a triazole compound 0.001 to 1 part by weight (H) a platinum compound and 3 A reaction mixture of 5,5-dimethyl-1-hexyn-3-ol, which is a liquid composition containing 1 to 1000 parts by weight of platinum based on 1 million parts by weight of the component (A). To provide high voltage equipment parts for power lines. (Note that the first, second, and third inventions are collectively referred to as the present invention unless otherwise specified in this specification.)

[0008]

Embodiments of the present invention will be described below. The high-voltage equipment component for power lines of the present invention uses a silicone rubber molded body as an electrically insulating component. First, each component used in the silicone rubber according to the present invention will be described.
The organopolysiloxane of component (A) used in the silicone rubber that constitutes the electrical insulating component in the first invention is such that at least two of the organic groups bonded to silicon atoms in one molecule are vinyl and propenyl. Organopolysiloxanes that are alkenyl groups such as groups, butenyl groups, hexenyl groups and the like are used. As the organic group other than the alkenyl group, an alkyl group such as a methyl group, an ethyl group and a propyl group, a phenyl group, an aryl group exemplified by a tolyl group,
Examples of the substituted alkyl group include a 3,3,3-trifluoropropyl group and a 3-chloropropyl group. Among these organopolysiloxanes, those having a vinyl group are preferable because the raw materials can be easily obtained and synthesized. Further, from the viewpoint of mechanical properties and moldability, the organopolysiloxane has a viscosity of 100 to 10 at 25 ° C.
It is necessary to be in the range of 10,000 centistokes, and preferably in the range of 100 to 50,000 centistokes. Specific examples of the component (A) include:
Examples thereof include a dimethylpolysiloxane having both ends dimethylvinylsiloxy group blocked, a dimethylsiloxane / methylvinylsiloxane copolymer having both ends dimethylvinylsiloxy group blocked, and a dimethylsiloxane / methylphenylsiloxane copolymer having both ends dimethylvinylsiloxy group blocked. (B)
The component, finely divided silica, is a reinforcing filler for improving the strength of the silicone rubber. Examples of such fine powder silica include fumed silica and precipitated silica. Among these, ultrafine particle fumed silica having a particle size of 50 μm or less and a specific surface area of 100 m ² / g or more is preferable. Further, surface-treated silica, for example, hydrophobic silica surface-treated with organosilane, hexaorganodisilazane, diorganocyclopolysiloxane or the like may be used.

If the amount of the component (B) is too small, the mechanical strength of the insulating component will be weak, and if it is too large, it will be difficult to highly fill the components (C) and (F). Therefore, the blending amount of the component (B) is 1 to 60 parts by weight, preferably 10 to 40 parts by weight, based on 100 parts by weight of the component (A). The zinc carbonate powder or basic zinc carbonate powder as the component (C) functions to improve the tracking resistance, erosion resistance, and arc resistance of the electrically insulating component of the present invention. Such zinc carbonate powder or basic zinc carbonate powder may be used as it is, but the viscosity of the liquid composition used for molding is further lowered to improve the moldability, and silicone rubber molding is performed without causing curing inhibition. To get a body,
It is preferable to use those surface-treated with an organosilicon compound selected from the group consisting of organosilanes, organosilazanes, organosiloxane oligomers and mixtures thereof. If the component (C) is too small, the desired tracking resistance, erosion resistance and arc resistance cannot be obtained, and if it is too large, the moldability deteriorates. Therefore, the blending amount of the component (C) is 1 to 200 parts by weight, preferably 15 to 150 parts by weight, based on 100 parts by weight of the component (A).

The components (D) and (E) are the cross-linking agent and cross-linking catalyst for the liquid composition of the present invention. That is,
The silicon atom-bonded hydrogen atom in the component (D) undergoes an addition reaction with the silicon atom-bonded alkenyl group in the component (A) in the presence of the catalyst for the hydrosilylation reaction of the component (E), and as a result, the liquid composition of the present invention. The product crosslinks and hardens. The organohydrogenpolysiloxane as the component (D) has at least two hydrogen atoms bonded to silicon atoms in one molecule. Examples of the organic group other than hydrogen bonded to the silicon atom include an alkyl group, an aryl group and a substituted alkyl group. The amount of the component (D) is the ratio of the number of moles of silicon atom-bonded hydrogen atoms in the liquid composition used for molding the silicone rubber to the number of moles of silicon atom-bonded alkenyl groups in the component (A) (0. The amount is from 5: 1) to (20: 1). The component (E) is preferably a platinum-based catalyst, and specific examples thereof include chloroplatinic acid, an alcohol solution of chloroplatinic acid, a complex compound of chloroplatinic acid and olefins, chloroplatinic acid and divinylsiloxane. And the like. The amount of component (E) is a so-called catalytic amount.

In the second invention of the present application, the component (A)
A silicone rubber molded product obtained by molding a liquid composition obtained by further mixing the component (E) with the component (F) into a predetermined shape and curing the composition is used as an electrical insulating component to improve the tracking resistance and erosion resistance. Has been. Like the component (C), the aluminum hydroxide powder as the component (F) functions to improve the tracking resistance, erosion resistance, and arc resistance of the silicone rubber. This aluminum hydroxide powder is preferably surface-treated with an organosilicon compound selected from the group consisting of organosilanes, organosilazanes, organosiloxane oligomers, and mixtures thereof, as in component (C). The component (F) has a synergistic effect with the component (C), and has tracking resistance of the silicone rubber,
Improves erosion resistance and arc resistance, but (F),
(C) If both components are too small, desired tracking resistance,
Erosion resistance and arc resistance cannot be obtained. On the other hand, if too much, workability deteriorates. Therefore, the blending amount of the component (F) is required to be 1 to 200 parts by weight, preferably 15 to 150 parts by weight, relative to 100 parts by weight of the component (A). (F)
When components (C) and (C) are used in combination, the total amount of both components is preferably 30 to 300 parts by weight per 100 parts by weight of component (A). When both components (F) and (C) are used in combination, sufficient tracking resistance and erosion resistance can be obtained even if the total compounding amount is smaller than the case where they are used alone due to the synergistic effect of both. . In this case, the total amount of both components is 30 to 15 with respect to 100 parts by weight of the component (A).
The amount of 0 parts by weight can improve the workability and moldability, and is more preferable from the viewpoint of improving productivity.

In the third invention of the present application, a liquid composition is prepared in which the components (A) to (E) or (A) to (F) are further mixed with the components (G) and (H). A silicone rubber molded body that has been molded into a shape and cured is used for electrical insulating parts, and the tracking resistance and erosion resistance are further improved. By using the triazole-based compound as the component (G) in combination with the component (H) described below, the tracking resistance and erosion resistance of the silicone rubber can be further improved. Examples of such triazole compounds include benzotriazole, 1, 2, 3
-Triazole, 1,2,4-triazole and their derivatives are exemplified. The blending amount of this component is (A) component 1
It is 0.001 to 1 part by weight with respect to 00 parts by weight. This is because if the amount is too small, the effect of improvement does not appear, and if it is further compounded, curing inhibition is likely to occur, and the effect of improvement cannot be observed beyond a certain level.

The component (H) has the effect of improving the tracking resistance and erosion resistance of the silicone rubber, and comprises a platinum compound and 3,5-dimethyl-1-hexyne-3.
Consisting of a reaction mixture of all. Here, the platinum compound and the reaction mixture of 3,5-dimethyl-1-hexyn-3-ol are so-called reaction products formed by the reaction of the two, and these reaction products and the platinum compound as the raw material thereof. It means a mixture of 3,5-dimethyl-1-hexyn-3-ol. As the platinum compound, chloroplatinic acid,
Examples include platinum olefin complex, chloroplatinic acid and alkenyl siloxane complex. The blending amount of this component is (A) component 10
The amount of platinum is 1 to 1000 parts by weight with respect to 0,000 parts by weight.

The silicone rubber that constitutes the electrically insulating component used in the high-voltage equipment component for power transmission lines of the present invention has the above-mentioned components (A) to (E) or (A) to (F) or (A). A liquid composition obtained by adding the components (G) and (H) to the components to the component (E) or the component (A) to the component (F) is cured. In addition to these components, the addition of an additive known to be added to a conventional silicone rubber composition to the liquid composition may be added unless the object of the present invention is impaired.

Examples of the additives include non-reinforcing fillers, pigments, heat-resistant agents, flame retardants, internal release agents, plasticizers and the like. Specific examples of non-reinforcing fillers include diatomaceous earth, quartz powder, calcium carbonate, mica, aluminum oxide,
Examples thereof include magnesium oxide and titanium oxide. Examples of the pigment include carbon black and red iron oxide, and examples of the heat-resistant agent include rare earth oxides, rare earth hydroxides, cerium silanolates, and cerium fatty acid salts. Since the liquid composition of the present invention gradually undergoes a curing reaction even at room temperature over time, when it is necessary to maintain a long pot life, ethylcyclohexanol, dimethylformamide, triphenylphosphine are used. A conventionally known reaction inhibitor such as cyclic methyl vinyl siloxane may be added. By uniformly kneading each of the above components, and then molding them into a predetermined shape and curing (crosslinking), a product excellent in weather resistance, tracking resistance, erosion resistance, and arc resistance can be obtained.

The electrically insulating component according to the first aspect of the present invention has a tracking resistance, an erosion resistance and an arc resistance which are different from those obtained by molding and curing a conventional silicone rubber composition due to the compounding effect of the component (C). Excellent in. In the second invention, tracking resistance and erosion resistance are improved as compared with the first invention due to the compounding effect of the component (F). Further, in the third invention, the tracking resistance and erosion resistance of the first invention and the second invention are further improved by blending the component (G) and the component (H). In particular, when a silicone rubber molded body obtained by molding and curing a composition containing all the components (A) to (H) is used as an electrical insulating component, it can be the most excellent device component. In addition, (C) component and (F) component
Since the component (H) has a synergistic effect, the addition amounts of the components (C) and (F) can be made relatively small even when desired tracking resistance and erosion resistance are obtained. . As a result, the material viscosity at the time of molding the insulating component can be kept low, so that the material injection pressure can be kept low. At the same time, it becomes easy to obtain a large molded product. By making full use of these characteristics of the material,
It is possible to design and manufacture insulating parts with complex shapes and precise structures.

The molding of the electrically insulating component according to the present invention is
The components (A) to (E) are essential components, and if necessary, the components (F) or (G) and (H) or the components (F), (G) and (H). The liquid composition obtained by blending the desired amount is cast using a mold having a predetermined shape, a transfer molding method, a LIM (Liquid Liquid) method.
Injection molding) A conventionally known molding method such as a molding method can be appropriately selected and performed according to the purpose. Especially,
The LIM molding method is preferable when molding a component having a complicated shape or a component having a long shape. When molding and curing, the conditions vary depending on the size of the molded body, but for example,
In the case of an insulator, it is cured by heating at a mold temperature of around 110 ° C. for about 30 minutes. The molded product taken out from the mold is then subjected to a heat treatment at about 100 ° C. for 2 hours or more, preferably about 4 hours, in order to complement the curing and adhesion to the adherend and stabilize the physical properties. Is applied.

The present invention will be described below according to the illustrated embodiments. FIG. 1 is a partially cutaway front view showing an embodiment of a silicone insulator which is an example of a high-voltage equipment component for power transmission lines of the present invention. As shown in FIG. 1, a silicone insulator 1 has a cross-section circle formed of a fiber reinforced plastic (hereinafter referred to as FRP) in which a fiber bundle arranged in the axial direction or a woven or knitted fiber bundle is impregnated with a synthetic resin. In the state where the gripping metal fittings 4, 4 are fitted to both ends of the rod-shaped body (rod) 3, the outer circumference from one gripping metal fitting 4 to the other gripping metal fitting 4 is molded by silicone rubber molding 2 It is the one covered by. Reference numerals 5 and 5 denote holes formed in the grip fittings 4 and 4, respectively.
And another terminal (not shown) connected to the electric wire, respectively. The silicone molded body 2 is an electrically insulating component of the silicone insulator 1, and can be formed into a shape having a plurality of cap portions. FIG.
Among them, reference numerals 7 and 8 denote cap portions provided on the body portion 6 of the silicone molded body 2. The cap portion 7 has a large diameter and the cap portion 8 has a small diameter.
Are provided in plurality.

FIG. 2 is a partially cutaway front view showing an embodiment of a silicone porcelain tube which is an example of a high voltage equipment component for a power transmission line of the present invention. As shown in FIG. 2, the silicone porcelain pipe 11 has a flange 14 and a flange 14 which are fitted to both ends of an inner cylinder 13 made of an FRP pipe, respectively. F
The outer circumference of the RP pipe 13 is covered with the silicone rubber molded body 12 by molding. In the silicone porcelain tube 11 as shown in FIG. 2, since the core FRP pipe 13 is hollow, if the material is injected at a high injection pressure during molding, there is a problem that the FRP pipe is cracked. Therefore, when a conventionally known material highly filled with aluminum hydroxide powder is used to impart tracking resistance and erosion resistance, the injection pressure must be increased because of its high viscosity. It was difficult to manufacture such parts. On the other hand, in the present invention, since the silicone rubber molded body is molded from the liquid composition,
The injection pressure at the time of molding can be lowered. For example, according to the second invention of the present application, by using the component (C) and the component (F) together in the composition to be used for the silicone molded article, the composition before molding can be made into a liquid having a low viscosity. By using this liquid composition, an insulating component having desired tracking resistance and erosion resistance can be easily formed. That is, it is not necessary to highly fill the component (F) or the component (C) in order to impart the tracking resistance and the erosion resistance, and the conventional tracking resistance and resistance can be improved by using the component (F) and the component (C) together. It is possible to manufacture a component having characteristics equal to or higher than those of a silicone insulator having excellent erosion property without hindering productivity.

FIG. 3 is a partially cutaway front view showing a silicone insulator according to another embodiment of the present invention. This silicone insulator 21 is similar to the one shown in FIG.
The outer periphery of the rod 23 between the gripping metal fittings 24 to 25 is covered with a silicone rubber molding 22 by molding in a state where both end portions of 3 are fitted with the gripping metal fittings 24 and 25, respectively. The grip fittings 24 and 25 are shown in FIG.
As shown in FIG. 3, not only the part for holding the rod 23 but also the part acting as a terminal may be integrally molded into a predetermined shape. FIG. 4 is a partially cutaway front view showing an example of a conventional porcelain insulator. As shown in FIG. 4, the porcelain insulator 31 includes a porcelain cap portion 3 which is an electrically insulating component on a metal fitting 33 made of a conductor.
2, 32 are provided. As shown in FIGS. 3 and 4, as compared with the conventional porcelain insulator 31, the silicone insulator 2 of the present invention is used.
1 is extremely complicated and can be molded with a dense structure, so it has an insulation length equivalent to that of porcelain insulators and several times the effective insulation length, and has weather resistance, tracking resistance, erosion resistance, and arc resistance. It is possible to obtain excellent high-voltage equipment parts.
Therefore, in the same space as the conventional one, it is possible to secure a power transmission capacity higher than the conventional one.

[0021]

Next, the present invention will be described in more detail with reference to examples. In the following Examples and Comparative Examples, “parts” means “parts by weight”. Examples 1 to 5 and Comparative Examples 1 to 4 Using liquid compositions prepared so as to contain the components (A) to (H) shown below in the ratios shown in Table 1 and Table 2, In the shape shown in FIG. 1, the silicone rubber molding of the insulator was molded by the LIM molding method (mold temperature 110 ° C., 30 minutes), and the mold was removed.
By heat treating at 00 ° C. for 2 hours,
5, the insulators of Comparative Examples 1 and 2 were produced. Each liquid composition is composed of a liquid A containing a predetermined amount of each of the components (A) to (H) excluding the component (D), which is a curing agent, and a curing catalyst so that curing does not proceed during storage. Excludes certain (E) ingredients (A)
(B) were obtained as a set of two liquids of liquid B in which predetermined amounts of the respective components (1) to (H) were mixed. These two liquids were mixed at a compounding ratio of 1: 1 before the insulator molding and used for molding. In order to compare the ease (flowability) of injecting a liquid composition into a mold, the viscosity after mixing the two liquids at 23 ° C. was measured using a Brookfield type single cylinder rotary viscometer in accordance with JIS K7117. It was measured. The results are shown in Tables 1 and 2.

Component (A): Dimethylsiloxane having both ends blocked with dimethylvinylsiloxy groups (viscosity 10,000 centistokes at 25 ° C.) (B) Component: fumed silica having a specific surface area of 200 m ² / g (C) Component: Zinc carbonate powder having an average particle size of 10 μm surface-treated with hexamethylene disilazane (D) component: Dimethylsiloxane / methylhydrogensiloxane copolymer (E) component: Hydrosilylation reaction catalyst (chloroplatinic acid) (F ) Component; aluminum hydroxide powder having an average particle size of 1 μm (G) component; benzotriazole (H) component; chloroplatinic acid-divinyltetramethyldisiloxane complex and 3,5-dimethyl-1-hexyne-3-
Reaction mixture with oar

Further, as Comparative Examples 3 and 4, conventional porcelain insulators and EVA insulators using an ethylene-vinyl acetate copolymer as a base resin were prepared. The prepared various insulators were evaluated for arc resistance, tracking resistance, etc. according to the methods described below.

○ Arc resistance test A 25kA x 0.
After applying a voltage for 34 seconds, the appearance of the insulator surface was observed and the withstand voltage test described below was performed. Withstanding voltage test is JIS
It was conducted in accordance with the commercial frequency water injection flashover voltage test of C3801 6.3. Water is tap water (about 100
Ω · m), and the water injection amount was 3 mm / min for the vertical component. In addition, a commercial frequency water injection flashover voltage test was carried out after the original insulator of the sample insulator and after the arc test (voltage application),
The flashover voltage was compared with the original product after the arc test. Since the insulator must have sufficient dielectric strength against the line voltage even after being exposed to the arc, the flashover voltage after the arc test is 90% or more of that of the original product (before the test). Pass if it is maintained at the standard.

○ Tracking resistance test IEC1109 5.3 Tests were carried out in accordance with the tracking resistance and erosion resistance tests by the salt fog chamber method.
The test conditions are described below.・ Applied voltage: 13-21kV (34.6mm / kV constant) ・ Fog chamber volume: 10m ³ or less ・ Insulator arrangement: vertical arrangement ・ Fog injection amount: 0.4 ± 0.1 liters / (m ³・ h) ・Fog size: 5-10μm ・ Fog chamber temperature: 20 ± 5 ℃ ・ Salt fog concentration: 10 ± 0.5kg / m ³・ Test time: 1000hrs

The acceptance criteria for this test are as follows. 1) The number of flashovers (effective value 1A or more) is 3
Be less than or equal to times. 2) Tracking does not occur. 3) Erosion does not reach the core. 4) There is no puncture on the shade. The above evaluation results are shown in Tables 3 and 4.

[0027]

[Table 1]

[0028]

[Table 2]

[0029]

[Table 3]

[0030]

[Table 4]

From the results shown in Table 3, the insulators of Examples 1 to 3 were
It can be seen that the arc resistance is excellent and the withstand voltage characteristics after the arc test maintain the original level. It is also found that the tracking resistance and erosion resistance are excellent. In particular, the insulator of Example 2 has the best arc resistance, tracking resistance and erosion resistance due to the synergistic effect of both components (C) and (F). Examples 4, 5
From the results shown in Table 3, it can be seen that the insulator was excellent in arc resistance, and the withstand voltage characteristics after the arc test maintained the original level. Also, it can be seen that the tracking resistance is also excellent. In particular, due to the combined effect of both components (G) and (H),
Even if the composition of the component (C) or the total amount of both the components (C) and (F) is 100 parts by weight or less, excellent tracking resistance is exhibited, and the viscosity of the composition can be suppressed to a low level. You can see that it is excellent.

From the results shown in Table 4, the composition used in Comparative Example 1 was obtained by removing zinc carbonate from the composition used in Example 1, but the surface deterioration after the arc test was remarkable, and the arc test was performed. It can be seen that the later withstand voltage characteristics are also below the acceptance criteria. Also, although it did not reach the FRP core material, erosion was observed on the surface and flashover was 2
You can see that it has occurred once. Comparative Example 2 is an example using a composition in which 150 parts of zinc carbonate in the composition of Example 1 was replaced with 150 parts of aluminum hydroxide. Compared with Comparative Example 1, the arc resistance was improved to a certain level by filling aluminum hydroxide with a high amount, but it did not reach the acceptance standard, and the erosion resistance of the tracking resistance was low. Although the results are improved, it can be seen from these results that the other effects are not expected to be improved.

Comparative Example 3 is a porcelain insulator having the closest specifications to those of the silicone insulator evaluated above, but it is found that both arc resistance and withstand voltage characteristics after the arc test are inferior.
Further, in Comparative Example 3, flashover occurred 4 times 5 hours after the start of the test, which shows that the tracking resistance is extremely poor. Furthermore, the weight of the porcelain insulator is about twice that of the silicone insulator, which is inferior in terms of compactness.

In Comparative Example 4, an insulator in which a material obtained by blending an aluminum hydroxide with an EVA resin whose specifications are very close to those of the silicone insulator is used for the outer cover (insulating part) is evaluated and the arc resistance is evaluated. However, it can be seen that the body portion after the arc test is heavily consumed, and the withstand voltage characteristics after the arc test are at the bare edge of the acceptance criteria. In this way, the insulator body is so worn that it is not satisfactory as an insulator. Furthermore, the water repellency of the outer skin surface, which is considered to have a close relationship with the withstand voltage characteristics, is evaluated by EVA,
Silicone rubber has been lost, but with silicone rubber, the phenomenon that the water repellency is restored after one day is recognized.
It was not observed in VA.

[0035]

Industrial Applicability The silicone rubber insulating parts used in the high voltage equipment parts for power transmission lines of the present invention have the above-mentioned (A) to (A).
Since the liquid composition comprising the components (E) or (A) to (F) or (A) to (H) is used, the moldability is excellent,
In addition, it is lightweight, has excellent impact resistance, and has high voltage electrical insulation characteristics such as weather resistance, erosion resistance, tracking resistance, and arc resistance under conditions exposed to severe pollution or severe climate for a long time. Can be maintained. Therefore, according to the present invention, since it is lightweight and hard to break, it contributes to downsizing of power transmission and distribution lines and the like, and since it has excellent weather resistance, arc resistance, tracking resistance, and erosion resistance, it has a long initial resistance. The voltage characteristic can be maintained.

[Brief description of drawings]

FIG. 1 is a partially cutaway front view showing an embodiment of a silicone insulator which is an example of a high voltage device component for a power transmission line of the present invention.

FIG. 2 is a partially cutaway front view showing an embodiment of a silicone porcelain tube which is an example of a high-voltage equipment component for power transmission lines of the present invention.

FIG. 3 is a partially cutaway front view showing a silicone insulator according to another embodiment of the present invention.

FIG. 4 is a partially cutaway front view showing an example of a conventional porcelain insulator.

[Explanation of symbols]

 1 Silicone Insulator 2 Silicone Rubber Molded Body (Electrical Insulation Parts) 3 FRP Rod 4, 4 Grip Metal Fitting 11 Silicone Insulator Tube 12 Silicone Rubber Molded Body (Electrical Insulation Parts) 13 FRP Pipe 14, 14 Flange 21 Silicone Insulator 22 Silicone Rubber Molded Body ( Electrically insulating parts) 23 FRP rod 24, 25 Grasping metal fitting 31 Porcelain insulator 32, 32 Porcelain cap part 33 Metal fitting

─────────────────────────────────────────────────── ─── Continuation of the front page (51) Int.Cl. ⁶ Identification number Internal reference number FI Technical indication H01B 3/46 H01B 3/46 Z 17/00 17/00 C 17/60 17/60 N

Claims (3)

[Claims] 1. A high-voltage equipment component for a transmission line comprising an electrically insulating component made of silicone rubber, wherein the electrically insulating component has (A) at least two silicon atom-bonded alkenyl groups in one molecule, 100 parts by weight of organopolysiloxane having a viscosity of 100 to 100,000 centistokes at 25 ° C. (B) 1 to 60 parts by weight of finely powdered silica (C) 1 to 200 parts by weight of zinc carbonate powder or basic zinc carbonate powder ( D) Organohydrogenpolysiloxane having at least two silicon-bonded hydrogen atoms in one molecule [the amount of this component is the number of moles of silicon-bonded hydrogen atoms in this composition and the amount of silicon in component (A)] The amount of the mole number of the atom-bonded alkenyl group is (0.5: 1) to (20: 1). ] And (E) Catalyst for hydrosilylation reaction A high-voltage equipment component for a power transmission line comprising a silicone rubber molded product obtained by molding a liquid composition containing a catalytic amount into a predetermined shape and curing the liquid composition. 2. A high-voltage equipment component for a transmission line comprising an electrically insulating component made of silicone rubber, wherein the electrically insulating component has (A) at least two silicon atom-bonded alkenyl groups in one molecule, 100 parts by weight of organopolysiloxane having a viscosity of 100 to 100,000 centistokes at 25 ° C. (B) 1 to 60 parts by weight of finely powdered silica (C) 1 to 200 parts by weight of zinc carbonate powder or basic zinc carbonate powder ( D) Organohydrogenpolysiloxane having at least two silicon-bonded hydrogen atoms in one molecule [the amount of this component is the number of moles of silicon-bonded hydrogen atoms in this composition and the amount of silicon in component (A)] The amount of the mole number of the atom-bonded alkenyl group is (0.5: 1) to (20: 1). ] (E) Catalyst for hydrosilylation reaction Catalyst amount and (F) Aluminum hydroxide powder 1 to 200 parts by weight A liquid composition is molded into a predetermined shape and cured to form a silicone rubber molded article. High voltage equipment parts for power lines. 3. A liquid composition comprises the components (A) to (E).
Component or the above-mentioned components (A) to (F), and further a reaction mixture of (G) triazole compound 0.001-1 parts by weight (H) platinum compound and 3,5-dimethyl-1-hexyn-3-ol 2. A liquid composition containing 1 to 1000 parts by weight of platinum based on 1 million parts by weight of the component (A).
Alternatively, the high-voltage equipment component for a power transmission line according to claim 2.