A method of obtaining a protective coating of high-voltage insulator
(57) Abstract:Use: manufacture of protective coatings of high voltage polymer insulators external performance. The inventive is applied before forming the protective jacket on fiberglass core intermediate sublayer containing, wt.%: talc 8 - 20; -aminopropyltriethoxysilane 0,8 - 2,0; monoparesis 0,2 - 0,6; Sevilen - rest, followed by drying, and polymer composition as a polymer base contains a high-pressure polyethylene (LDPE) or a modified copolymer of ethylene and vinyl acetate (CMEA), or a mixture of a copolymer of ethylene with vinyl acetate or a modified copolymer of ethylene and vinyl acetate with a high-pressure polyethylene in the following ratio, wt.%: aluminum hydroxide 40 - 50; Agidol-2 0,1 - 0,4; benzene OA 0,15 - 0,5; HDPE or modified CMEA or a mixture or modified CMEA CMEA with high-pressure polyethylene rest. For use as polymeric bases or modified CMEA CMEA mixed with high-pressure polyethylene in a ratio of(10 - 20) : (80 - 90). As the modified CMEA use CMEA, modified silanandabhivamsa the Noah floor, received the claimed method allows to obtain high electrical characteristics, adhesion and mechanical strength of the insulator. Improves the performance of the process, and reduces the cost of the finished products. 3 C.p. f-crystals, 2 tab. The invention relates to electrical engineering, and in particular to methods of manufacturing a protective coating of high voltage polymer insulators external performance.It is known that the use of insulators protective ribbed coating of polymer materials, compared to conventional protective structures made of porcelain and glass, has technical and economic advantages due to their mechanical and electrical properties, low weight and ease of installation.A known method of manufacturing a protective coating of high-voltage insulators made of polymeric materials, providing for the application of fiberglass rod liquid sealant of the siloxane polymer, narisovanie on the rod prefabricated elements ribbed cover, closing them in the axial direction on the shaft, heat treated rod elements ribbed coating in an oven at a special regime 
The disadvantage of this method astadia manufacturing facilities do not provide the technical and environmental safety.Closest to the technical essence and the achieved effect is a method of obtaining electrical insulator, where the fiberglass pipe or rod put intermediate layer of the same material or its modifications and ribbed floor and reinforced this layer of continuous filaments, such as glass or polymer, arranged tangentially or spiral-cross around the carrier pipe. The intermediate reinforcing layer and the carrier pipe can be made of ribbed 
The disadvantage of this method is the technological complexity of obtaining insulators, the need for special equipment and premises for winding, possible environmental threat, high cost of production, low productivity of the production process.In the framework of the invention, a method for obtaining a protective coating of high-voltage insulator, comprising forming on a fiberglass rod (pipe) ribbed protective jacket of polymeric compositions.The novelty of the method consists in the application before forming the protective jacket on fiberglass core intermediate sublayer containing, by weight. Talc 8-20
-Aminopropane polymer base contains a high-pressure polyethylene (LDPE) or a modified copolymer of ethylene and vinyl acetate (CMEA), or a mixture or modified CMEA CMEA with high-pressure polyethylene, in the following ratio, wt. Aluminum hydroxide 40-50 Agidol-2 of 0.1-0.4 Benzene OA 0,15-0,5
pressure (LDPE) or
the polymer of ethylene with TS-
or a mixture of CMEA or modi-
fitiavana CMEA with HDPE Else
For use as a polymer base, or modified CMEA CMEA mixed with LDPE in the ratio (10-20):(80-90). As the modified CMEA use CMEA, modified silanandabhivamsa connec - tions (for example, the following fragments
As the use HDPE polyethylene with a melt flow index not lower than 2.0 g/10 min.Protective coating, obtained by the claimed method allows to obtain high electrical characteristics, adhesion and mechanical strength of the insulator. Improves the performance of the process, and reduces the cost of the finished products. No winding polymeric or glass fibers improves the manufacturability of the application of protective coatings due to the lack of special equipment and facilities for winding.The introduction of the intermediate sublayer determine the Yu strength of the protective coating.The manufacturer of the protective jacket from the composition containing: aluminum hydroxide, Agidol-2, benzene OA, and as the basis HDPE or modified CMEA or a mixture of CMEA with HDPE or a blend of the modified CMEA with HDPE in the claimed ratio allows to obtain high performance protective coatings by the method of injection molding with the use of industrial thermoplas - avtomatov that improves the manufacturability of the product as a whole and reduces the cost of the finished products.The method is as follows.On a fiberglass rod with a diameter of 12 mm is applied in any manner by spraying, dipping, brush, wrapped ready tape) intermediate sublayer of the composition containing talc, aminopropyltriethoxysilane, monoparesis, Sevilen thickness of 50-100 μm, dried at 60-100aboutC for 1-3 hours depending on the thickness of the layer, and then molded using thermoplastic machines at 160aboutWith a protective coating in the form of ribbed shirt fiberglass rod coated with a sublayer of the claimed composition.The test conditions and results are summarized in table.1 and 2.The tests were carried out in accordance with the requirements of GOST 28856-90.
and on the level of performance coatings, manufactured according to the method prototype. At the same time, the proposed method has higher adaptability and efficiency.1. A method of OBTAINING a PROTECTIVE COATING of high-VOLTAGE INSULATOR, comprising forming on a fiberglass core ribbed protective jacket of polymeric composition, wherein before forming the protective jacket on the fiberglass core is applied to the intermediate coating of the following composition, wt.Talc 8 20
Aminopropyltriethoxysilane 0,8 2,0
Monoparesis 0,2 0,6
followed by drying, and polymer composition as a polymer base contains a high-pressure polyethylene or a modified copolymer of ethylene and vinyl acetate, or a mixture of a copolymer of ethylene with vinyl acetate or a modified copolymer of ethylene and vinyl acetate with a high-pressure polyethylene in the following ratio, wt.Aluminum hydroxide 40 50
Agidol 0,1 0,4
The benzene OA 0,15 0,5
The high-pressure polyethylene or a modified copolymer of ethylene and vinyl acetate, or a mixture of a copolymer of ethylene with vinyl acetate or a modified copolymer of ethylene with vinyl is Jena with vinyl acetate or a modified copolymer of ethylene and vinyl acetate is mixed with high-pressure polyethylene in the ratio 10 20 80 90.3. The method according to PP.1 and 2, characterized in that the modified copolymer used is a copolymer of ethylene with vinyl acetate, modified silanandabhivamsa connections.4. The method according to PP.1 and 2, characterized in that as high-pressure polyethylene used polyethylene with a melt flow index not lower than 2.0 g/10 min
FIELD: electrical engineering; insulating materials.
SUBSTANCE: proposed method for manufacturing insulating materials used in insulators and surge limiters, as well as in manufacturing pipelines, bushes, shells, bearings, wiring insulation of cases includes some additional operations; pre-drying, impregnation, and final drying of prepreg are effected in vacuum chamber and arbor is preheated before prepreg rolling up. Electric strength of prepreg produced by this method is 3.7 to 4.5 kV/mm which is much higher than that of known tubular prepregs.
EFFECT: enhanced quality of fabric surface pre-treatment, improved conditions of impregnation process.
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
FIELD: manufacture of column-shaped high-voltage bushing insulators.
SUBSTANCE: proposed bushing insulator has symmetrical hollow cylindrical external insulator 1 with lead-through head 2 supported by one of its butt-ends and designed for connection to high-voltage supply. Resting on opposite end of insulator is lead-through base 3 designed for connection to ground potential. Proposed method involves sequential fitting of lead-through base 3, external insulator 1, and lead-through head 2 on drawing frame 5; lead-through base 3 rests in this case on insulating case 6. Lead-through base 3 and lead-through head 2 are tightly fitted to one another through drawing frame 5 that mounts insulating case 6. Clamping member 21 made for shifting in axial direction is installed on flange 22 of lead-through head 2 prior to fitting the latter on drawing frame 5; head flange 22 and clamping member 21 are pressed against one another to produce pre-tensioning force. During next fitting of pre-tensioned lead-through head 2 clamping member 21 is secured on end of drawing frame 5 passed through insulator 1, and then clamping member 21 is taken off head flange 22 to form negative allowance.
EFFECT: enhanced economic efficiency in manufacturing high-voltage bushing insulator.
7 cl, 2 dwg
FIELD: chemical industry; methods and devices for manufacture of the electric plastic insulators.
SUBSTANCE: the invention is pertaining to the field of manufacture of the electric plastic insulators. The device for manufacture of electric plastic insulator contains the mould for manufacture of the insulating screens, which may be installed concentrically around the vertically located core or the hollow core. The mould has the field arranged below in the axial direction and fitting to the core around it or to the hollow core and the arranged above in an axial direction area, which is extending in radial direction with respect to the field arranged below in the axial direction and may be made according to the form of the being produced insulating screen. Between the end of the arranged below area in the axial direction and the upper end of the mould there is at least one injecting channel for injection of the liquid synthetic material under pressure. The method of manufacture of the electric plastic insulator is realized in several steps: a) the mold is installed in the preset axial position; b) form the a sealing coupling between the core and the mould; c)inject the liquid synthetic material under the heightened pressure with respect to the pressure of the environment; d) harden the synthetic material in the mould; e) remove the sealing joint; f) transfer the mould downwards on the preset spacing interval; h)repeat the steps b) - f) up to production of the required number of the insulating screens. The invention ensures the shorten duration of the material molding and curing, that reduces the production time of the insulators.
EFFECT: the invention ensures the shorten duration of the material molding and curing, that reduces the production time of the insulators.
12 cl, 3 dwg
FIELD: electrical engineering.
SUBSTANCE: proposed method for producing spiral skirt 2 for high-voltage insulator 1 allows for manufacture of actually cylindrical backing 3, extruder 10 incorporating extrusion head 11 that governs extrusion direction A, makes use of extruder 10 for extruding insulator skirt 2 and application of the latter onto backing 3 while rotating this backing relative to extrusion head 11. Novelty is that extrusion direction A actually coincides with longitudinal axis of backing 3; the latter is fed through extrusion head 11. Skirt manufactured by this method can be used for high-voltage insulators, high-voltage lightning arresters, or high-voltage cable entries.
EFFECT: ability of producing high-voltage parts having relatively small diameter.
12 cl, 3 dwg
FIELD: electrical engineering; polymeric insulators and their manufacturing process.
SUBSTANCE: proposed composite insulator manufacturing process includes skeleton fixation in winding mechanism that rotates it about longitudinal axis at the same time moving skeleton along its axis, production of profiled band from T-section silicone rubber band by means of extruder, installation of fin in a spaced relation between turns followed by its rolling-on. Skeleton rotating and moving mechanism is inclined relative to extruder through angle equal to that of fin inclination. Fin is thickened at least on one end of base and this end is flattened in the course of rolling to fill up clearance between adjacent turns. Then part obtained is polymerized and wiring hardware is mounted thereon.
EFFECT: facilitated manufacture, improved termination of silicone finning edge.
1 cl, 2 dwg
FIELD: electrical engineering; electrical insulators.
SUBSTANCE: protective shell is manufactured from two parts: a tube (a hose) slid over a rod or a pipe made of electrically insulating material and glued to said rod/pipe, and fins that can be glued over said tube (hose) at any intervals allowing for obtaining any leakage path length.
EFFECT: improvement of reliability and cost-effectiveness of polymer insulators.
FIELD: electrical engineering.
SUBSTANCE: invention relates to electrical engineering, particularly to the method of making high-voltage lead terminals. Channels are made in the electrically conducting element of a lead terminal, providing for access of the impregnating compound to inner layers of electric insulating material, and on the end sections, flanges are attached, which boarder the area where electric insulating material is put. After winding electric insulating material, the lead terminal is thermally processed and put into an elastic sealed sheath, on which nipple passages to its inner cavity are put, uniformly distributed along the sheath. The lead terminal is then put into an impregnating chamber, thereby joining channels in the electrically conducting element and the nipple passages with the vacuum-pressure impregnating system. Further impregnation and insulation are done at high pressure of neutral liquid in the impregnating chamber and the compound inside channels in the electrically conducting element. The neutral liquid is heated and the lead terminal is baked.
EFFECT: increased reliability and service life of lead terminals.
10 cl, 2 dwg
FIELD: electric engineering.
SUBSTANCE: invention is related to bushing insulator for supply of electric current and/or voltage. Bushing insulator (1) for supply of electric current and/or voltage via grounded plate (2), comprising axisymmetric insulating bushing (3), which surrounds central electric conductor (4). Bushing insulator has sealing part (5) for gas/liquid sealing between conductor and insulating bushing, which represents insulating paper impregnated with resin. Insulator is equipped with compressing sealing element (6), which serves as gas/liquid sealing between conductor and insulating bushing and combined with insulating bushing. Method for manufacturing of bushing insulator comprises impregnation of insulating bushing with hardening material and giving monolith shape in process of hardening with shrinkage. Sealing part is placed on part of conductor axial conductor length between insulating bushing and conductor prior to winding of insulating material.
EFFECT: invention gives possibility to avoid concentration of mechanical stresses at external edge of insulating bushing.
29 cl, 6 dwg
FIELD: electric engineering.
SUBSTANCE: device for reinforcement of suspended insulators comprises carcass with mechanism of insulators feed to working positions of rotary table installed on carcass, pressing devices with shoes coaxial to stems of working positions, interacting with vibrating sector, fixed frame with guide block installed on carcass, and also comprises horizontal platform hingedly fixed on frame with working guide block rigidly fixed on it, on horizontal platform, which is spring-loaded versus frame, there is a vibrator arranged, shoe of pressing device is equipped with pressing rubber piece having ledges that contact with insulator ribs.
EFFECT: increased applied forces of vibration and improved mechanical strength of finished insulators, reliable connection of insulator elements, sufficient seal of cement-sand adhesion and removal of air from it.
2 cl, 3 dwg