A method of manufacturing a tubular insulators
The invention relates to the field of electrical engineering, and in particular to methods for manufacturing insulators or insulating phone Method of manufacturing a tubular insulators includes a winding on a mandrel binder impregnated fabric. Previously, the fabric is dried at a temperature of 120-150C, then placed in a vacuum chamber at a pressure of 10-3-10-2mm RT. century to complete obezvozhivanija, then the chamber is filled with an adhesive prepared fabric is wound on the mandrel, and then the product is subjected to heat treatment for curing the bonding material. When the winding on the mandrel cloth pressed to her freely rotating roller. Wound tissue can be produced in two layers or more. The technical result of the invention is the possibility of obtaining a tubular insulators of any transverse and longitudinal dimensions with high mechanical and electrical strength through the use of coiling fabric with multiple rolls at full electrical isolation joints. 2 C.p. f-crystals, 3 ill.The invention relates to the field of electrical engineering, in particular to the major items of electrical equipment, and in particular to methods shotline the roving impregnated before laying epoxy composition. The method has several disadvantages: complexity of the equipment, low productivity high speeds of movement of the roving in the epoxy composition, which leads to porosity of the product and a low electric strength (D. C. Rosato, K. S. grove. The wound fiber glass. - M.: Mashinostroenie, 1969, S. 12-46).There is a method of winding cylinders glass, which has the same drawbacks as in the previous case (although the performance is higher), and large waste pipe through the marginal areas associated with the change of direction of the pickup tape on a rotating mandrel. In addition, glass is more expensive than glass roving in production (A. A. Shevchenko, P. C. Vlasov. Layered plastics in chemical apparatus and pipelines. - M.: Mashinostroenie, 1971, S. 21-76).There is a method of winding a cloth pre-impregnated with epoxy compound. The advantage of this method compared to previous ones is the possibility of winding with a relatively low speed, because the length of the pipe corresponds to the width of the fabric. Another advantage of this method is the provision of a small waste pipe at its ends. Eliminates the need is Yu winding device (centuries Baranovsky, G. M. Dulitzky. Layered plates for electrical purposes. - M.: “Energy”, 1976 - prototype).A significant disadvantage of this method is the impossibility of making pipes, the greater the width of the fabric. Winding cloth end-to-end to extend the length of the pipe is not valid in connection with the formation at the interface of the site with a low mechanical strength, which is determined by the strength of the binder. Wound tissue overlap leads to the formation of local swelling, voids in the pipe and folds wound tissue, resulting in lower electric strength spooled pipe.This invention eliminates the drawbacks and prototype.The technical result of the invention to provide a homogeneous mass of the isolator of any desired length and thickness, regardless of the width of the fabric with a given winding density and provision of overlap joints of the strips of one layer of fabric adjacent layers, which improves the electrical and mechanical strength of the product as a whole and the performance of manufacturing insulators.The technical result is achieved in that in the method of manufacturing a tubular insulators by winding on a mandrel pre-impregnated fabric binder material, and temperature 120-150C, then placed in a vacuum chamber at a pressure of 10-2-10-3mm RT. century to complete obezvozhivanija fabric, synchronizing the time rewind fabric with roll-to-roll, then the chamber is filled with an adhesive to its impregnation with rewinding prepared fabric is wound on the mandrel, and then the product is subjected to heat treatment for curing the bonding material. When the winding on the mandrel cloth pressed to her freely rotating roller.Winding long products are produced in two layers and more, and the band of tissue located on the mandrel butt, and in each layer the fabric shifted part of the fabric width equal to the width of the fabric, divided by the number of layers.According to the invention the fabric of the required size (width and length) is first subjected to a heat treatment at a temperature of 120-150With the removal from it of moisture (drying). Then roll the dried fabric is placed in a vacuum-impregnating chamber, where the first under vacuum (10-3-10-2mm RT. Art.) is removed from the fabric of the air, and then is impregnated fabric binder (epoxy composition, liquid silicone rubber, etc.,). Moreover, the evacuation and impregnation are made in the process posledovati fabric is removed from the chamber, tightly wrapped with plastic film and placed for storage in a refrigerator at a temperature of 2-5From where it can be stored using the composition of hot curing agent at least one week.As necessary, soaked roll of tissue is removed from the refrigerator and placed on a filament winding machine. On reeling machine impregnated fabric is rewound from the roll on the mandrel, the outer diameter of which corresponds to the inner diameter of the product. Wrap the fabric is pressed against the mandrel roller, pressed against the fabric spring or cargo in order to provide a preselected winding density and remove excess epoxy composition.After reaching the required thickness of the winding drive of the mandrel is turned off (automatically or manually), wrap the fabric is cut from the roll of impregnated cloth. Product wrapped around the film of heat-resistant material having no adhesion to the epoxy resin (such as PTFE), then the product is removed from the winding machine and placed in a heat chamber to ensure the polymerization of the binder. After completion of the polymerization, the product is recovered from the heat chamber and sent for mechanical obrabotki) layer (sunset), the fabric in one layer is shifted relative to another (the other) half of the width of the fabric (or part of the width of the fabric equal to the width of the fabric, divided by the number of layers (visits)). In this case, for one revolution of the mandrel is wound two (or more) layer, which significantly speeds up the winding process, increases the mechanical strength against bending, tension and compression products.The invention is illustrated in Fig.1, 2A and 2B. In Fig.1 illustrates a winding tubular insulator length equal to twice the width of fabric (top view) 1 - frame; 2, 3 - band fabric one layer; 2', 3' - bobbin-soaked cloth; 4, 5, 6 - band fabric of the second layer; 4', 5',6' - bobbin with a soaked cloth.The mandrel 1 are laid out end-to-end two strips of fabric 2, 3, coiled with two rolls 2', 3'. On top of this first layer of fabric is laid a strip of fabric the same width 4 in such a way that the junction of the fabric of the first layer is in the middle of the strip of fabric of the second layer. Complemented by a second layer of strips of fabric 5 and 6, the half width of the butt to the middle zone of the second layer. These two intersection coincide with the middle of the strips 2 and 3 of the first layer. During rotation of the mandrel 1 one turn, these two intersection will be blocked lanes 2 and 3 fabric of the first layer. When this strip is overall technique of coiling. In Fig.2B is a view along arrow A.The mandrel 1 is rotated to get the pipe of the desired thickness. The rate of increase of thickness greater than with the single winding cloth, because each part of the pipe leaves the two (or more) coils (Fig.2A). In this case, there will be no local swelling, no folds, no voids in the winding. Therefore, neither electrical nor mechanical strength will not be less than the usual winding cloth.This way you can get a tube of infinite length. It is possible that the fabric rolls that are wound on the mandrel, can be pre-impregnated with epoxy composition under vacuum or without vacuum), and the impregnation can be carried out while moving the fabric from the roll on the mandrel by dipping epoxy composition, followed by “rubbing” it in a fabric that with one, on the other hand the system is non-rotating shafts with removal of excess binder.
Claims1. A method of manufacturing a tubular insulators by winding on a mandrel pre-impregnated fabric binder material, and the diameter corresponds to the inner diameter of the insulator, characterized in that the fabric is pre-dry it is-2mm RT.article to complete obezvozhivanija, then the chamber is filled with an adhesive to its impregnation with rewinding prepared fabric is wound on the mandrel, and then the product is subjected to heat treatment for curing the bonding material.2. A method of manufacturing a tubular insulators under item 1, characterized in that the winding on the mandrel cloth pressed to her freely rotating roller.3. A method of manufacturing under item 1 or 2, characterized in that the winding fabric produced in two or more layers, having a band of tissue located back to back, and each layer of fabric is shifted part of the fabric width equal to the width of the fabric, divided by the number of layers.
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