The method of obtaining sledovanie paper
(57) Abstract:Use: in the manufacture of insulating materials, in particular sledovanie paper, mainly used as insulating spacers, for example, between the slats collectors, insulation of the windings of electrical machines, high voltage cables, etc. object of the invention is to increase productivity and simplification of the manufacturing process sledovanie paper. The inventive sledovanosti paper produced by its formation of alternating fibrous and mica layers on a paper machine with simultaneous layer-by-layer feed fibrous mass and mica slurry on a moving mesh, while the fibrous layer is used as the substrate. 1 C. p. F.-ly. The invention relates to the production of insulation materials, in particular sledovanie paper, mainly used as insulating spacers, for example, between the slats collectors, insulation of the windings of electrical machines, high voltage cables, etc.Known fibrous material Nomex M", developed by DuPont, on the basis of aramid fiber, made using the made using proven technologies of paper production and use as a material of the additive fine mica, it provides its relative cheapness. Fibrous base provides high flexibility and mechanical strength, particularly tensile strength.The disadvantage of this material is relatively low resistance to private discharges and corona discharge related to the fact that the mica flakes are arranged in a fibrous mass of chaotic. High barrier properties of mica paper appear only when continuous mica layer, when the flakes of mica lie parallel to the surface and overlap each other.A method of obtaining sledovanie paper, where the casting machine of mica pulp molded Sudoplatov paper, which is then impregnated with a binder and bonded to a fibrous substrate of woven or nonwoven fibrous material, in particular, cellulose, polyester, phenylon", fiberglass, etc.,  there Can be several alternating fibrous and mica layers.In the wet method of forming a mica sheet mica shimmer pulp on the net flakes of mica in the dehydration of the pulp are parallel to the surface, which provides good barrier properties. Application Sudoplatov paper on voloknam varnish, provides high mechanical strength, particularly tensile strength.The disadvantages of the known method of obtaining sledovanie material with alternating layers of fibrous and micaceous material are the complexity of the process in General and the poor performance of manufacturing mica sheet related to the fact that the mica layer in the wet state has zero mechanical strength, drying produce on the grid electric and hot air, and not feeding on the drying drum, which limits the speed and thus the productivity of manufacturing. Time-consuming, requiring additional equipment and materials, is the impregnation of the mica layer and bonding it to the substrate.Known selected as a prototype method for producing sledovanie paper having a substrate of fibrous organic or inorganic material and deposited integrated mica sheet, obtained from small mica flakes, mixed with fibers, such as wood and bonded electrically insulating binder, wherein the integrated mica layer in the form of a sheet is applied to the substrate in the wet state during its Poroi is applied only on the periphery of the sheet, and partly due to adhesion.The known method provides a simpler and cheaper process connection mica sheet with a fibrous substrate.The disadvantage of this method is the complexity of the process in General and the poor performance of manufacturing mica sheet material as dehydration and drying are performed directly on the grid without the use of the drying drum.The objective of the invention is to increase productivity and simplification of the manufacturing process sledovanie paper.The problem is solved due to the fact that when using the known method of obtaining sledovanie paper by forming alternating fibrous and mica layers, forming as fiber and mica layer is produced on the paper machine by simultaneous multilayer feed fibrous mass and mica slurry on a moving mesh, while the fibrous layer is used as a substrate.When using the mass of the inorganic fibers in it add organic boomgaarden or binder fiber.Due to the simultaneous overlap of the fibrous mass and the grid paper machine forming two layers, of which the lower fibrous and serves as a carrier substrate, which progresses the grid is dehydrated and acquires a mechanical strength sufficient to pull in the press section and the dryer, and then kalenderhane. This eliminates the need for the second casting machine and some other devices required for separate forming layers. The use of the press section and the drying drum speeds up the process of manufacturing sledovanie paper. Adhesion between the layers is provided by adhesion, resulting from Sylvania fibers. To increase the strength of paper and improve the quality of the adhesion layer in the inorganic fibrous mass it is advisable to add organic boomgaarden fiber. Due to this excludes the bonding process, thereby simplifying the manufacturing process.In the proposed method are served in layers not fibrous mass, and two very different components: mica pulp, consisting of thin split mica, and fibrous mass. In addition, the filing of two fibrous masses may intermingling and intertwining Wolna the problem of obtaining sledovanie material is continuous barrier mica layer, which leads to prolonged high dielectric strength of the material in products. Probably confused by the obvious technical solutions and the uncertainty that this decision was not made earlier. It's just the fact, which had to deal with the authors. All professionals mica, and fibrous paper argued that fail layered material of mica, and fibrous masses that the masses in the formation of the sheet will dissolve and penetrate one layer to another, and will receive the option of paper type "Nomex M", developed by DuPont. The second objection specialists will not be contact between the fiber and mica layer, especially if it is an inorganic fiber.Empirically, the authors are convinced that these, in General convincing arguments, not wealthy. Received paper of sufficient quality, and in contrast to pure mica securities mechanically very resistant strain, perfectly impregnated on the vertical impregnating machines. It should be noted that this is not the only case when practice belies theoretical background. So the opinion that the proposed method has been used for a well-known technique (flow on a moving mesh combine the n blend and penetrate into the thickness is not corresponding layer. In the case sledovanie paper this does not happen, flakes of mica create a continuous barrier layer only of mica flakes, without fibers. They absolutely do not penetrate into the fibrous layer. It was just so unexpected effect, which must be different to the invention.Due to the characteristics of the technical solution according to the invention, completely solved the problem, the components of the invention.The claimed technical solution to a set of characterizing features at present is unknown; therefore, it meets the criterion of "novelty."The claimed technical solution can be carried out industrially using known hardware and materials. The paper has a wide application in electrical engineering, radio engineering, cable engineering and other industries. Therefore, the claimed technical solution meets the criterion of "industrial applicability".The claimed technical solution describing his signs is the original, giving an unexpected effect that solve multiple problems, formulated the pits of the criterion of "inventive step".The proposed method consists in simultaneously applying to the grid of the paper machine through the inlet device layer-by-layer feed fibrous mass and mica pulp, which form a separate, not miscible with each other the layers of which the lower fibrous layer plays the role of a carrier substrate. On the grid during the movement of the fibrous mass and the mica slurry is partially dewatered and moist served in the press section, where the pressing of the material, and then to the clothes dryer. When this fibrous material in the wet state acquires a mechanical strength sufficient to transfer material on the drying drum. For additional sealing material and planarization carry out his calendering. To provide increased mechanical strength, for example, when using mica paper instead of not impregnated tapes, mica layer can be cast between the two fibrous layers in the form of cake.As the fibrous material can be used both organic and inorganic fiber. When using the inorganic fibers in the fibrous mass, it is advisable to add organic bumagoobrazuyuschie car company "Bruderhaus" was made of two kinds of paper from the masses on the basis of aramid fibers and mica pulp ofclassification at a speed of 0.75 cm/s Received cloudvalenta paper at a thickness of 40 μm (20 μm fibrous layer and 20 μm mica layer) had a mechanical strength of 20 N/mm2and electric strength of 25 kV/mmP R I m m e R 2. On listonline the device was molded double-layer paper of weight on the basis of refractory fibers and phlogopite mica pulp with the addition of 2% carboxymethylcellulose. The obtained samples was loose, so they spray deposited a solution alumacraft density of 1.34 g/cm3after which the samples were Kalandarishvili. When the thickness is 0.3 mm, the samples had the mechanical strength of 5.4 N/mm2and electric strength of 8 kV/mmP R I m e R 3. On listonline the machine was made of three-ply paper with layers of refractory fibre (mica) refractory fibre with the addition of 3.2% carboxymethylcellulose. After calendering at a thickness of 0.26 mm paper had the mechanical strength of 5.5 N/mm2and dielectric strength of 9.5 kV/mmP R I m e R 4. Two-layer paper was produced by a firm "Bruckhaus with a substrate layer of glass fiber mass with addition of 5% hibrido of phenylon". At a thickness of 80 μm paper had a tensile strength of 500 m length and e is mistigo fiber with the addition of 5% hibrido of phenylon " and mica pulp, at a thickness of 100 μm had a breaking length of 450 m and a dielectric strength of 5.4 kV/mmIn the process of making all the examples of types sledovanie paper on the paper machine with affected device layer-by-layer feed fibrous mass and mica pulp blending fibers and mica occurred.The fear of erosion of the fibrous layer of the jet mica pulp was not confirmed. Bonding of the layers was sufficient without the adhesive layer. Flakes of mica was placed parallel to the surface overlap each other, forming a continuous barrier layer. In all cases of practical application sledovanie paper as insulation material delamination did not occur. As can be seen from the examples, cloudvalenta paper had a high mechanical and electrical strength.In comparison with the known methods of manufacture sledovanie paper the proposed method allows to combine the process of forming layers on a single paper machine, to refuse necessary in the known methods of additional equipment for moulding mica sheet and additional bonding process layers, as well as to accelerate the technology is no increase productivity, as well as to simplify and reduce the cost of the manufacturing process sledovanie paper without deterioration of its quality. 1. The METHOD of OBTAINING SLEDOVANIE PAPER from at least one fiber and one mica layer, wherein the forming of the fibrous layer is produced by applying on a moving mesh paper machine fibrous mass and the connection of this layer is coated on top of him mica is carried out in the process of formation of a fibrous layer, characterized in that simultaneously with the filing of a fibrous mass produce supply mica pulp, forming the specified mica layer.2. The method according to p. 1, characterized in that when using inorganic fibrous mass in it add organic boomgaarden fiber.
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