Method for manufacture of composite high-voltage insulator, high-voltage insulator, as well as plastic for use in such insulator and method for manufacture of non-cylindrical structural member

FIELD: the invention describes the method for manufacture of a high-voltage insulator with an elongated central solid or hollow body, plastic casing and one or several plastic sheds.

SUBSTANCE: the method consists of several stager: the casing from plastic is obtained by means of casting or extrusion for the solid or hollow body; the sheds are formed from plastic; the plastic of the casing and/or the plastic of the sheds is partially stitched, and whenever necessary, the incompletely stitched plastic of the casing or shed are stitched completely, the shed is fastened on the specified place on the casing, and the obtained blank of the high-voltage insulator is stitched completely. The silicon rubber contains at least two stitching catalysts reacting at various temperatures, or at least two inhibitors suppressing the reacting of connection at various temperatures.

EFFECT: facilitated procedure.

28 cl, 3 dwg

 

The present invention relate to a method of manufacturing a composite insulator of the high voltage, the composite insulator of the high voltage, which can be manufactured by this method, and synthetic material, which is used in this facility. Further, the invention relates to a corresponding method of manufacturing feasibility structural element.

For the purposes of this invention the concept of the high voltage used in a broad sense and refers to voltages above 1000 volts, whereupon it is, in some sense, along with the area of high voltage and also covers the area of secondary stresses.

Insulators high voltage is multi-functional structural elements, which are primarily used for electrical isolation in the sense of ensuring recovery of the leakage current resistance to breakdown and durastanti. From the point of view of mechanics, they are under tension, compression, bending, and also have a support function, for example, in the case of hollow insulators for switch.

Currently known insulators high voltage ceramics, molding resins and composite insulators, the latter becoming more and more common. Usually they represent a node in the center of which is a cylindrical rod (a is s ' case) or pipe (hollow body), reinforced fiberglass, with a covering of synthetic material, mainly silicone rubber. In turn, covering, usually covered in a solid or hollow casing and the radiating layers of skirts, which serve to repel rainwater, as well as to lengthen the path of the leakage current between the ends of the rod or pipe. On a solid or hollow body is attached end fittings, determined by the operating conditions. The combination of a solid or hollow body and the plastic casing will for brevity be called "Core".

Composite insulators with coverings of plastic, usually made of silicone resin, the preferred primarily for two reasons: first, plastic and especially silicone shell is very hydrophobic, i.e. water-repellent ability of insulators to be used outdoors, high, favouring gazettelive, and minimize leakage current. Secondly, simple design for easy installation.

In practice, basically there are two methods of producing composite insulators:

a) the So-called molded technology (see figure 1). In this way the jacket and skirt (cladding) 2 are cast in solid or hollow shell with molded shape having a longitudinal slot. However, the disadvantage is consider what Ino low flexibility in obtaining insulators of different forms. In addition, this method cannot be cast complex profiles, for example, the grooves on the skirt, unless you use multi-component moulds, which, however, substantially increase the cost of production,

b) a multi-stage process of manufacturing (see figure 2). In this case, the cover 6 is molded or extruded in a solid or hollow body, separately preparing skirt 3, typically by injection molding or extrusion, which are then placed on the core and fasten it using any adhesive.

Method b) is substantially more flexible than the method (a), however, it cannot be considered optimal. Adhesive joint 4 between the skirt and the core, no doubt, creates the problem of electric corrosion, it is also possible residual film of adhesive 4A on the core between the skirts. In addition, he, in any case, uneconomical, because the adhesive must be applied in a separate process, and the excess residue after installing skirts have in effect mentioned electrical reasons to be manually removed until complete disappearance.

Consequently, the purpose of the present invention is to develop a flexible method of manufacturing composite insulators for high voltage, which does not require bonding of the casing and skirts. This includes the development of related products plastics and methods is in General.

The invention includes a method of manufacturing an insulator high voltage with an elongated Central solid or hollow casing, the casing is made of plastic and one or more skirts made of plastic, with the following steps: the housing is made of plastic applied to a solid or hollow body by casting or extrusion; molded skirts made of plastic; however, the casing material and/or skirts are partially sewn together, and optionally crosslinked partially plastic shroud or skirt sew to the end. Next steps are to install the skirt into place on the casing; and made so harvesting facility closed permanently.

In addition, the present invention includes the development of an insulator of the high voltage with an elongated Central solid or hollow casing, casing of plastic, and one or more skirts, while the insulator high voltage is produced in the manner specified above.

In addition, the invention includes a synthetic material for use in the above method. The material contains at least two crosslinking catalyst, reacting at different temperatures, or, at least, two different inhibitors, inhibitory response add up to different temperatures.

Finally, the invention includes a method of manufacturing feasibility structural element with an elongated C is tralnin solid or hollow body, plastic casing and one or more plastic elements, reinforced ribs. The method involves the following steps: the housing is made of plastic by molding or extrusion put on a solid or hollow body; molded reinforced ribs links; plastic casing and/or plastic reinforced with stiffeners parts of partially sewn, and optionally partially crosslinked plastic casing or reinforced ribs links sew almost to the end. The method comprises the following further steps: reinforced ribs links mounted in its intended location on the casing; and thus obtained the design is stitched completely.

In zavisimyh paragraphs describe specific preferred examples of execution.

Figure 1 represents a cross-section of part of a composite insulator of the high voltage, the covering of which received a single-stage process, according to the prior art.

Figure 2 is a cross-section of part of a composite insulator, high voltage, obtained according to the prior art, with a skirt attached to the casing, and an adhesive seam.

Figure 3 illustrates an example of execution of this invention and is a schematic cross-section of a composite insulator, high voltage, sostayashego the two elements with a covering without the glue line.

Examples of execution, shown in figure 3, are described in more detail below.

Composite insulator is electrically insulated elongated Central body 1, which may be exposed to at least stretch and has for example the form of a rod or pipe. For example, it is made of reinforced fiberglass plastic. In case 1 extruded thin casing 2, made, for example, of silicone rubber. On the casing 2 to put on the skirt 3, which depart in the radial direction or at an acute angle. They are made in advance by, for example, injection molding or pressing. The casing 2 and the skirt 3 is chemically joined to each other along the perimeter of the plane of the contact 5, which will be explained in more detail below. To increase the leakage path skirts 3 can be on one or both sides of the fins or grooves.

Due to the flush connection, i.e. adjacent to each other without gaps, plastic casing and skirts insulator, of which at least one component only partially sewn (podoinikova), and the other if necessary sewn almost completely, resulting in a complete crosslinking (vulcanization), as described in the Executive summary of the invention, there is a very stable covalent bond. For the case when both components covering stitched in part, this is quite obviously the O. However, with almost complete the stitching of one of the components of the plating may form a chemical covalent bonds between Podpolkovnik and fully vulcanized components of the plating, so as to fully vulcanized plastic, usually near the surface there is enough reactive groups, so that under the action of the remaining catalyst for the crosslinking to form with podkoloryzowane resin stable chemical bonds, for example, that well-known specialist in the field of adhesive substances for synthetic materials. In both cases there is homogeneous from a physical point of view, the shell without electric seam.

The preferred synthetic material for use in the method according to the invention is silicone rubber. Therefore, further description of the method will be carried out for example silicone rubber. However, it should be borne in mind that the invention is not limited to silicone rubber, it covers all insulating synthetic materials such as polyethylene, a copolymer of ethylene and ethylenically, a copolymer of ethylene and vinyl acetate, a copolymer of ethylene and propylene (EPM), a ternary copolymer of ethylene, propylene and diene, (EPDM), chlorosulphurized polyethylene, polypropylene, a copolymer of butyl acrylate and glycidylmethacrylate is a, polybutene, butyl rubber and polymers with ionic groups.

In principle, the joining of plastic may be conducted by any known method, including under the action of radiation. However, the preferred method is to cross-linking with the use of a catalyst.

Partial joining of plastic in the method according to the invention can also be carried out and dosed by irradiation or by using a single catalyst for the crosslinking or silicone rubber, stitched with the reactions of addition, with a single inhibitor, with selected appropriate duration of reaction and temperature. However, preferably used is still at least two catalyst for crosslinking with different temperatures of reaction. In this case, the catalyst is lower than the reaction temperature mainly introduced in an amount which is not sufficient for complete crosslinking of the plastic; and, accordingly, the catalyst or catalysts with higher reaction temperature preferably loaded in such a quantity, which is exactly enough in combination with a catalyst with a lower reaction temperature to provide a complete joining of plastic. The specific amount of these crosslinking catalysts depend on the type of catalyst and plastic and can be determined from standard tests. Partially crosslinked is or podkoloryzowane panelling should be easy to handle and have a stable shape. The amount of catalyst(s), reactive(acting) at a higher temperature, can be calculated from the data on the catalyst, reacting at lower temperatures, or determined simply by experience. In the case of silicone rubber, stitched with the reactions of addition, use at least two different inhibitor knitting, quenching the reaction stitching to different temperatures.

Speaking of the silicone rubber, stitched radical way, I mean predominantly poly(dimethylpolysiloxane), primarily sold by Wacker Chemie under the trademark "Powersil 310", which is a poly(dimethylpolysiloxane) with the addition of highly dispersed silicic acid as a reinforcing filler and three-hydrate of aluminum to increase the resistance to leakage current.

For partial matching (podocarpaceae) the above silicone rubber is preferably added at least two radical catalyst decomposing at different temperatures. The preferred peroxy catalysts, especially bis(2,4-dichlorobenzophenone) (50%solution in silicone oil), "the Staple E" produced by Wacker Chemie, which starts to react at 90°and 2,5-bis(tertBUTYLPEROXY)-2,5-dimethylhexane (45%solution in silicone ka is Ciuc); "The staple C6" produced by Wacker Chemie, which reacts with 170-190°C.

The specified number of radical catalysts which react at different temperatures, depending on their nature and the applicable rubber and can be easily determined by the expert from simple experiments with regard to the above General description. For example, for podocarpaceae. The stapler S is loaded in the silicone rubber in an amount of not more than 1.5 wt.%, and for the final vulcanization of the Staple C6 is loaded in the silicone rubber in an amount of less than 0.6 wt.%.

In the case of silicone rubber, stitched by the reactions of addition, the preferred poly(dimethylhydrogensiloxane), preferably in a mixture with hydrosilation, for example, poly(dimethylethylenediamine). The preferred catalysts are platinum catalysts. To have part of the stitching, for the reaction of prisoedinenia in silicone rubber type, at least one inhibitor, preferably, at least two of the inhibitor.

The amount of inhibitor increases the so-called point temperature jump is the temperature at which the reaction begins in the presence of this inhibitor. The inhibitor, which is provided for the lower critical temperature, is used preferably in such a quantity to reach the start point of the temperature jump, which is rather low, and that the silicone rubber is not bound in full; and the inhibitor or inhibitors, which should provide a higher point of the jump, are added in such quantities to complete the stitching was held at the temperature of the desired temperature range. The specific number of such catalysts depend on the type of inhibitor and silicone rubber and can similarly described above for the catalysts of stitching to be determined by the expert from the standard experience.

Examples of inhibitors are vinylmations (1:3) (supplied by Wacker Chemie under the designation RT 67) (ordinary the amount used in a single application: 0.5 to 0.75 wt.%, is added to the polyacrylate) and 5%solution ethynylcyclohexanol in silicone oil (supplied by Wacker Chemie under the designation RT) (ordinary the amount used in a single application: the 0.25 and 0.5 wt.%, is added to the polyacrylate).

If one of the components of the plating in the method according to the invention is already fully vulcanized, may be any catalyst suitable for the particular method of obtaining (e.g., casting, extrusion, injection molding or extrusion). These catalysts are well known to the specialist, including the above-mentioned catalysts E, C6 and platinum is the catalyst.

The proposed method is applicable not only to the named composite insulator high voltage, but can find successful application for all buildings that are shaped in a similar manner. Accordingly, the summary of the invention also includes a method of obtaining feasibility structural element, which has an elongated solid or hollow body, plastic cover (preferably cylindrical) and a few plastic parts reinforced with ribs. Speaking about the design element, it may be, for example, about the sleeves or tubes, on the outer edges of which may be for example, the reinforcing elements, fasteners or clamps. The sequence of actions in this case corresponds to the sequence of the above-described method of manufacturing composite insulators, high voltage, can also be used successfully suitable design.

In the specific example of manufacturing a composite insulator high voltage casing of the above-described silicone rubber "Powersil 310" one peroxide curative extruded over the core and stitched to a high degree. Skirts are formed at 140°by injection molding in the presence of the above-described staple E, taken in an amount insufficient for complete cure, and described above, the stapler is 6 in number, necessary for a complete cure, and modulenode. The core is provided with a tight-fitting skirts, and when 170°With a full vulcanization. In the result between the shell and the skirt is formed with a stable connection.

Thus, the overall objective of the proposed form of execution is to develop an improved method of making insulator high voltage or, in a broader sense, feasibility, design element, insulator high voltage generated in an appropriate way, as well as synthetic material for these purposes.

Everything described in this description of the publication and existing topics have been included in the description by reference.

The scope of this patent is not limited to the above description of methods, devices and products (insulators and plastic material to receive them). On the contrary, this patent covers all forms of execution of the invention within the above claims as literally, and is equivalent to the doctrine.

1. A method of manufacturing an insulator high voltage with an elongated Central solid or hollow body (1), plastic casing (6) and one or more skirts (3) made of plastic, consisting of the following stages: plastic cover (6) put on a solid or hollow body by casting or uh what strusia; form a plastic skirt (3); plastic casing (6), and/or plastic skirts (3) partially sewn, and optionally partially crosslinked plastic casing (6) or plastic skirt (3), respectively sewn essentially completely; skirt (3) installed in its intended location on the casing (6), and thus created the workpiece insulator high voltage stitched finally, the stitching is carried out, in particular, under the action of radiation using one or more catalysts for the crosslinking or by reaction connection with the use, at least one catalyst joining together with at least one inhibitor for the reaction of the merger.

2. The method according to claim 1, in which the plastic casing and plastic skirt is silicone rubber.

3. The method according to claim 1 or 2, in which the plastic casing and plastic skirts are identical.

4. The method according to one of claims 1 to 3, in which like plastic casing and plastic skirts contains at least one catalyst for the crosslinking.

5. The method according to one of claims 1 to 4, where plastic, which is partially the linker contains at least two crosslinking catalyst, reacting at different temperatures.

6. The method according to claim 5, in which the crosslinking catalyst, reacting at low temperature, is used in a quantity insufficient to meet fully the stitching.

7. The method according to claim 6, where one or more crosslinking catalysts, react at a higher temperature, used in quantity, just need to partial cross-linking in the future was gone.

8. The method according to one of claim 2 to 7, in which the plastic casing and/or plastic skirt is plastic, stitched with radiculopathy catalysts, especially poly(dimethylpolysiloxane), and which contains at least one, and preferably two radiculopathy catalyst, primarily peroxide catalyst.

9. The method according to one of pp.5-8, in which radiculopathy catalyst with a lower decomposition temperature is bis(2,4-dichlorobenzoyl)peroxide, and radiculopathy catalyst with a higher decomposition temperature is 2,5-bis(tertBUTYLPEROXY)-2,5-dimethylhexane.

10. The method according to one of claims 1 to 4, in which one or both of the synthetic material are plastics that can be stapled by the reaction of accession, and which contain at least one catalyst connection, preferably a platinum catalyst, and at least one inhibitor of the reactions proceed.

11. The method according to claim 10, in which the plastic, stitched by reaction of accession, is poly(dimethylpolysiloxane).

12. The method according to claim 11, in which the plastic, stitched by which eacli accession, contains one hydrosilation, predominantly poly(dimethylethylenediamine).

13. The method according to one of p-12, in which the plastic contains at least two different inhibitor, inhibiting the reaction of joining at different start points of the temperature jump.

14. The method according to item 13, which uses at least two inhibitor: vinylmations (1:3) and ethynylcyclohexanol.

15. The method according to item 13 or 14, in which one inhibitor with a lower point of the temperature jump is used in a quantity sufficient to complete the crosslinking of the plastic.

16. The method according to one of claims 1 to 15, in which the plastic used to seal the valve installed on the end of the Central solid or hollow body, in the same way as were installed skirts.

17. Insulator high voltage with an elongated Central solid or hollow body (1), plastic casing (6) and one or more skirts (3), made according to the method according to one of pp.5-7, 9 or 13 to 15, both plastic casing and plastic skirt contains silicone rubber.

18. Insulator high voltage with an elongated Central solid or hollow body (1), plastic casing (6) and one or more skirts (3), made according to the method of claim 8, in which the plastic is poly(dimethylpolysiloxane) and the cat is which contains two radiculopathy catalyst.

19. Silicone rubber containing at least two crosslinking catalyst, reacting at different temperatures, or at least two of the inhibitor, the quenching reaction of joining at different temperatures.

20. Silicone rubber according to claim 19, which is stitched using radiculopathy catalysts and which contains at least two radiculopathy of crosslinking catalyst, preferably a peroxide catalysts.

21. Silicone rubber according to claim 19 or 20, containing poly(dimethylpolysiloxane).

22. Silicone rubber is one of PP-21, which radiculopathy catalyst with a lower reaction temperature is bis(2,4-dichlorobenzoyl)peroxide, and radiculopathy catalyst with a higher reaction temperature -2,5-bis(tertBUTYLPEROXY)-2,5 - dimethylhexane.

23. Silicone rubber according to claim 19, which is closed by the reaction of accession and which contains at least one catalyst connection, preferably a platinum catalyst.

24. Silicone rubber for item 23, which is poly(dimethylpolysiloxane).

25. Silicone rubber is on point 24, which is methylhydrosiloxane, preferably poly(dimethylethylenediamine).

26. Silicone rubber is one of p-25 contains, at least two inhibitor reaction of adhesion, which are vanillateensblackcream (1:3) and ethynylcyclohexanol.

27. Silicone rubber is one of p-26, in which the catalyst is blended with the lower reaction temperature or the inhibitor with the lowest point of the temperature jump is added in a quantity sufficient to complete the crosslinking of the plastic.

28. Silicone rubber is one of PP-27, in which one or more crosslinking catalysts with higher reaction temperature is contained in an amount of accuracy required, together with a catalyst with a lower reaction temperature to provide a complete joining of plastic.

Priority items:

on pp.5, 8, 10, 15 from 01.03.2000;

according to claims 1-4, 6, 7, 9, 11-14, 16-28 from 27.06.2000.



 

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