A method of manufacturing a high-voltage insulator rod type
The invention relates to the field of electrical engineering, in particular to a method of manufacturing a high-voltage insulator rod type, and can be used on the transmission lines of high voltage. The technical result is that the method can significantly reduce the number of defects during firing, reduce drying time, reduce the time of firing of the product, to avoid the formation of S-shaped cracks, reduce waste, when drying products. This is achieved by extruding the procurement of raw insulating mass with the formation of through holes in the center piece, then turning, drying, glazing machine and firing, and after drying, the preform formed in the through hole is inserted a rod made of the same material as the workpiece, and pre-fired to a temperature that provides the initial strength of the rod and at the same time not specal it to the final density of the product, length, providing resistance withstanding voltage of 110 kV in order to avoid electrical breakdown, with the formation of the monolithic body after firing of the product. 3 Il. The invention relates to the field of electrical engineering, in particular to the way the Chi high voltage.A known method of manufacturing a rod insulators, which consists in the preparation of porcelain mass, making harvesting a method of inserting a mandrel on a lathe, drying, glazing machine and firing. Billet insulators get on vacuum presses, equipped with special mouthpieces-nozzles (Nikulin N. In., The Kortnev centuries "Production of washing products. Ed. High school, M. 1965).The disadvantage of this method is that in the manufacture of rod insulators, the billet is a solid cylindrical body, so it is technically difficult to avoid such a defect, as S-shaped crack which may occur during the molding, and after drying, and even firing. Drying of solid porcelain with large sizes, is a complex operation, because the removal of moisture is only with the outer surface, the processes of external and internal diffusion often do not coincide, which leads to stress and usually cracks on the product. Firing porcelain is also complicated by the fact that the product has a solid and massive form.The closest in technical essence and the achieved result is a method of manufacturing a high voltage is the fact that the turning, drying, the formation of through holes, the glazing machine and firing (WITH A. 1026167, BI 24 from 30.06.83 year).The objective of the invention is a significant reduction in defects during firing, the decline of marriage when drying products, the impossibility of formation of S-shaped cracks, reducing drying time, reducing the time of firing of the product.The problem is solved by a method of manufacturing a high-voltage insulator rod type, including extrusion billet from raw insulating mass with the formation of through holes in the center piece, the subsequent grinding, drying, glazing machine and firing, and after drying in the formed through hole is inserted a rod made of the same material as the workpiece, and pre-fired to a temperature that provides the initial strength of the rod and at the same time not specal it to the final density of the product, with the formation of the monolithic body after firing of the product.As the material of the rod porcelain mass.The essence of the invention lies in the fact that the insulating rod type initially molded by type of flow, forming an internal cylindrical hole through the core (mandrel), the diameter of which RA is the tension and bending). This allows to eliminate the possibility of occurrence of S-shaped cracks in the molding of the preform, to significantly reduce the drying time by reducing the diffusion path of moisture ( almost more than twice) and remove moisture from the two surfaces ( inner and outer), and provide more favorable conditions for the sintering of the product, thereby decreasing the likelihood of deformation and cracks.Given that the rod type insulators inner hole is not acceptable due to possible electrical breakdown, the present invention is proposed in the hole of the bushing insert rod made of porcelain mass of the same composition as that of the insulator. The rod is pre-calcined at a temperature which provides the initial strength of the rod and at the same time, not seals it completely. Then loop through the insulator together with the rod burn to the final firing temperature. The length of the rod should provide the necessary resistance of the insulator to avoid electrical breakdown.In Fig. 1 shows a high-voltage insulator rod type (in section), produced by the proposed method, after forming the through holes and to insert the rod, where 1 - to terravore type (in section) after insertion of the rod 3, but before the final firing of the product.In Fig. 3 presents a high-voltage insulator rod type (in section), where the through hole after insertion of the rod 3 and roasting products are actually eliminated to a depth equal to the height of the rod.The insulator may be made from any other washing mass. The rod, which is inserted into the through hole, is also made from the same ceramic material.An example of manufacturing an insulator For tape vacuum press get porcelain billet length 620 mm, with a diameter of 150 mm with a through hole with a diameter of 20 mm (humidity weight for pulling equal to 20%). The resulting billet provalivajut to a moisture content of 18.3%. The workpiece obtochuyut on a lathe horizontal type with a special set of tools. Set the workpiece is dried to a moisture content of 0.7%. The drying time of the insulator through-type 24 hours, while the drying time in the same prison without holes 36 hours.Dried insulator Glasurit by dipping method. The rod of diameter 20 mm and length of 40 mm is fired to a temperature of 1200oWith this, he shrinks 10%. After that, the rod is inserted into the dried and zaglazurovana blank and send to compatible with the screens 72 hours. The firing temperature of the workpiece with the rod 1320oC. this process produces a monolithic body (see Fig.3). The resulting product can withstand a voltage of 110 kV and has a mechanical tensile strength not less than 7 so
ClaimsA method of manufacturing a high-voltage insulator rod type, including extrusion billet from raw insulating mass, forming through holes in the center piece, the subsequent grinding, drying, glazing machine and firing, characterized in that after drying in the formed through hole is inserted a rod made of the same material as the workpiece, and pre-fired to a temperature which gives the initial strength of the rod and at the same time not specal it to the final density of the product, with long, providing resistance withstanding voltage of 110 kV in order to avoid electrical breakdown, with the formation of the monolithic body after firing of the product.
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