The support rod insulation design
(57) Abstract:The invention relates to electrical engineering and for supporting insulating structures for high-voltage substations. The support rod insulating structure in the form of at least one element containing a supporting insulating monolithic rod, protective takingstock shell and metal end fittings that are installed on both ends of the above-mentioned rod. According to the invention bearing insulation monolithic rod is made of two insulating elements, axial and external, in the form of a sheath at the base of fiberglass and polymer binder, formed on the axial element. When the metallic end fittings are flanges, secured with an adjustable fit on the ends of the rod. The fitting side "of the earth", at least twice as long as the fitting from the side of the high voltage. The technical result from the use of the invention is that in this reference insulation achieves high mechanical strength against bending and torsion, high dielectric strength, reduced insulating structures, and are provided strictly definite is the first design in mechanical strength when bending has more than ten-fold margin of safety and can be used as supporting insulation, for example, the high voltage equipment circuit breakers, disconnectors, busbar supports and other 4 C.p. f-crystals, 1 Il. The invention relates to electronics and concerns insulating support structures for high-voltage substations.Such support rod insulation are usually porcelain rod with ribs and secured at the ends by means of a cement ligament metal flanges. The insulators are designed for insulation and support of live parts in the switchgear stations and substations and, in particular, are used as the reference rotary insulating elements, supporting conductor bus and knives disconnectors when operating in the open air.The known reference-insulating structure in the form of a support post insulator containing bearing fiberglass rod with a unidirectional structure fiberglass protective ribbed trackinghistorical shell and metal end fittings (flanges), mounted on the rod by the method of volume reduction (Evidence of the Russian Federation N 5676, 1996).The main disadvantages of this reference-insulating structure is its low mechanical characteristics the I temperature, that does not ensure reliable operation of high-voltage apparatus using such insulating structures.Known insulating structure in the form of an insulator containing fiberglass casing formed in two directions, first along the body and a second transverse obtained by winding the impregnated fibers on the inner part of the housing. Trackinghistorical shell of injection moulded in the form of a fiberglass enclosure (PCT N WO 94/06127, H 01 B 17/06, 1993).The main disadvantage of this facility is that the external part of the body is produced by winding resin-impregnated glass fiber in the axial part of the body. Such fiber winding practically does not change the strength of the composite rod bending and torsion, and these characteristics significantly depend on the temperature.The known reference-insulating structure in the form of a support polymer insulator, which is used as supporting insulation of the high voltage equipment such as circuit breakers, disconnectors, busbar supports, etc. Insulator contains a rod of insulating material, for example from steklovata, impregnated with thermosetting compound, treningstudio rod and trackingstyle shell, and metal end fittings (RF Patent N 2074425, H 01 B 17/02, 27.02.97). This technical solution is the closest to the technical nature of the claimed and selected as a prototype.The main disadvantage of this design is that it does not have a sufficiently high mechanical characteristics bending and torsion and significant dependence of the mechanical properties of the core temperature, which does not ensure reliable operation of high voltage equipment.This circumstance requires the use of rods of large diameter, resulting in an insulator with a large lateral surface, which in turn leads to a decrease of the electrical characteristics. The use of large diameter rods requires massive flanges, which together leads to a large mass of the insulator and the high price.The invention solves the problem of the creation of a support rod insulation for insulation and support of live parts in the switchgear stations and substations, which is used as a reference rotating insulating elements, supporting conductor bus and knives of plant disconnectors from the th strength, when reducing the dimensions of the insulation structures and strict certain height of the insulator and parallelism of the flanges of the end fittings.To solve the problem stated support rod structure having at least one element containing a supporting insulating rod, protective trackinghistorical shell and metal end fittings that are installed on both ends of the insulator, which is proposed according to the present invention bearing insulation core to execute two insulating elements, axial in the form of a fiberglass rod and external in the form of a shell of glass-based glass and a polymeric binder formed on the axial element, the insulating elements in the form of monolith, protective treningslaila the casing is formed by a set of concentric rings, hermetically joined to each other and placed directly on the host terminal, and the metal end fittings are flanges with adjustable landing on the ends of the insulator by means of stoppers. Anchor rod design provides axial element made in the form of a rod with longitudinal rovings and the I. The fitting side "of the earth" must be at least twice as long as the fitting from the side of the high voltage.The invention is illustrated in the drawing.Declare the support rod insulation construction consists of a supporting rod which is formed of two insulating elements, the first axis is in the form of a fiberglass rod 1 and the second outer - shell 2 of the glass-based glass and a polymeric binder. The shell 2 is formed on the axial element in such a manner that forms a monolithic composite rod. The protective insulating treningslaila the casing is formed by a set of concentric rings 6 which are connected with end fittings 4 and 7 and to each other by a sealant, and is the protection of the core from atmospheric influences. The end fittings 4 and 7 are fixed on the ends of the rod with pins (stoppers) 5, which is also sealed. The end fittings 4 and 7 have flanges 3 for mounting them in the machines.The insulator is made as follows.The axial element in the form of a rod 1 made of fiberglass with a unidirectional structure of the fibers, fiberglass and fiberglass, pre is by winding around the rod 1 pre-impregnated polymer fiberglass and followed by curing. On the end part is made of a rod put on the bottom of the fitting 7, in which the center of the fixed terminal 2 and fix it with a pin 5. Formed in the cavity is placed first ring trackingstyle shell 6, and then produce a set of rings trackingstyle shell to the required size of the insulator. All joints between the rings and the tips are filled with sealant. Then put the upper fitting 4, which is fixed at the correct height pin 5.The advantage of this invention is the significant reduction of the support structure by performing it out of fiberglass or fiberglass.Composite structure carrying an insulating rod provides simultaneously high mechanical characteristics bending and torsion, low deformability, and a slight dependence of mechanical properties on temperature.Free planting tips on the ends of the rod and securing them with pins and their subsequent sealing allows it to more accurately observe the dimensions of the insulator, and to carry out the Assembly of insulators of various sizes anywhere. The absence of a stress state of a terminal in a place zakrepleniye when combined mechanical load in the various support structures.An additional advantage of the invention is the use of tips of different lengths (see drawing). The fitting side "of the earth" 7 should be not less than twice as long as the fitting from the side of the high voltage 4. This provides additional mechanical stability of the insulator and stable dielectric strength.The tests showed a high mechanical strength in bending, and the loss of mechanical strength of complete destruction (fracture) occurs. The reference insulator 110 kV based on composite rod with a diameter of 76 mm has a mechanical bending strength 3.5 tons at a height of 1 m When residual mechanical strength is about 70% of the maximum mechanical strength.Electrical testing facility show a stable discharge characteristics. The variation of the discharge voltage insulator when lightning pulses is not more than 1%, and the value of the withstand voltage of the insulator 110 kV is not less than 50 kV.The economic effect is achieved due to the trouble-free operation of the busbar disconnectors and then, and no injuries since the fall of the insulators is excluded. the t of the building in repair during the day.The test results disconnectors with such polymeric insulators confirm the possibility of their use as dividers operable under operational loads, and mechanical strength Flexural have more than ten-fold margin of safety that allows them to operate more than 50 years, taking into account the reduction of mechanical strength due to aging of polymeric material.The inventive anchor rod design can be used as a reference isolation of the high voltage equipment circuit breakers, disconnectors, busbar supports and so on, especially in those types of devices, supporting insulation which is under high mechanical loads in the open air.The use of such insulators as the basic insulation of high-voltage devices, such as isolators, will increase their reliability. 1. The support rod insulating structure in the form of at least one element containing a supporting insulating solid core with fiberglass, protective trackinghistorical shell and metal end fittings that are installed on both ends of the load bearing insulation monolithic rod, characterized t, ropicana polymeric binder, the metal end fittings are flanges, secured with an adjustable fit at the ends of the load bearing insulation monolithic rod by means of stoppers, and the fitting side "of the earth", at least twice as long as the fitting from the side of the high voltage.2. The support rod insulation design by p. 1, characterized in that the axial element is designed in the form of a rod with longitudinal glass fiber.3. The support rod insulation design by p. 1, characterized in that the axial element is made of fiberglass.4. The support rod insulation design by p. 1, characterized in that the axial element is made of fiberglass.5. The support rod insulation design under item 3 or 4, characterized in that the axial element of fiberglass or fiberglass pre-obtained by the extrusion method.
FIELD: suspension insulators.
SUBSTANCE: proposed suspension insulator has insulating petticoat 1 made of tempered glass or porcelain whose bottom side mounts pin 3 secured thereto by means of cement based binder 4; destructible zinc ring 5 that contacts binder and encloses pin; and annular insert 7 made of conducting material and inserted between petticoat and destructible ring to ensure reliable sealing preventing current leakage through binder. Insert also functions to prevent corrosion of pin and risk of insulator rupture. Conducting insert and destructible ring 5 form annular contact region, 5 to 10 mm high. Binder covers part of destructible ring. Insert is made of flexible material. Conducting material is elastomer incorporating electricity conducting filler particles, such as carbon particles. Suspension insulator string is assembled of set of mentioned suspension insulators. Insulator manufacturing process includes formation of annular insert by injecting elastomer material about pin onto binder; in the process insulator is revolved about its axis.
EFFECT: enhanced service life of insulator extended to that of sealing insert.
FIELD: electrical engineering.
SUBSTANCE: proposed polymeric insulator has polymeric stick reinforced by metal end terminal made in the form of cup whose bottom is covered with adhesive layer and side wall has conical inner surface on open end. Insulator stick is enclosed by rubber safety shell whose side portion is made in the form of cone and installed through adhesive layer in conical surface of current-carrying metal end terminal whose bottom is hermetically joined by means of, say, cold-hardening epoxy adhesive, with mechanically strong polymeric stick. Conical side wall of safety shell is molded together with inner conical side surface of end terminal with adhesive layer on length A. Molded onto stick is monolithic rubber shell; in the process mold forms conical side portion of this shell corresponding to inner conical surface on each end terminal. Conical surface is formed by mechanical treatment on inner surfaces of end terminals at open end. Stick butt-end and conical surfaces of end terminals are covered with adhesive layer. Stick is inserted in end terminals as far as it will go and tightly fitted to butt-ends of stick in axial direction of end-terminal bottom. Then end terminals and stick are molded together; in the process joint molding of end terminals and safety shell rubber is ensured in molding area A.
EFFECT: enhanced electric safety in continuous operation under high humidity conditions due to effective hermetic sealing of insulator structure.
1 cl, 3 dwg
FIELD: electrical engineering; high-voltage suspension insulators.
SUBSTANCE: proposed high-voltage suspension insulator has metal cap, metal stick with head or any other bulge, and insulating part made of tracking-resistant silicone rubber; its head is press-fitted between metal stick and metal cap. Insulator also has disk-shaped member with hole that functions to join metal cap with insulating part. The latter is composite part incorporating more than one annular skirt. Insulating part skirts have concentric ribs.
EFFECT: enhanced operating reliability, simplified design, reduced cost.
1 cl, 6 dwg
FIELD: electrical engineering; high-voltage insulators bearing heavy mechanical loads in high-voltage power transmission lines and in urban transport and railway contact systems.
SUBSTANCE: proposed polymeric insulator has insulating stick lined with tracking-protective ribs provided on its external cylindrical surface and reinforced by metal end pieces; each end piece is assembled of minimum two parts, each incorporating special member for fixing respective part of end piece and insulating stick in axial direction; this member enters mating member of insulating stick; end piece parts and insulating stick are also fixed in radial direction by means of shroud ring enclosing end piece parts.
EFFECT: enhanced reliability of end piece fixation to insulating stick due to enhanced bearing capacity of their joint.
4 cl, 9 dwg
FIELD: electrical engineering.
SUBSTANCE: proposed high-voltage polymeric insulator designed to carry heavy mechanical loads on high-voltage power transmission lines, contact systems of urban and rail transport has insulating stick lined with tracking-proof ribs installed on its external cylindrical surface and terminators installed on butt-ends of insulating stick; terminators are made of continuous flexible hardware impregnated with binder and made in the form of ring assembled of two arcs joined together by means of rectilinear sections; rectilinear sections of ring are locked in position within grooves provided on two or more parts joined together to form insulating stick; metal strap is installed within each terminator on ring arc.
EFFECT: enhanced reliability of polymeric insulator due to enhancing its load-bearing capacity.
3 cl, 6 dwg
FIELD: electrical engineering.
SUBSTANCE: invention relates to high voltage suspended rod polymer insulators of overhead transmission lines (OT), designed predominantly for voltage 6-1150 V. Polymer rod insulator contains terminators and protective coating, bearing rod is made from composite polymer material, which is reinforced with organic fibers with high module of elasticity and strength.
EFFECT: absence of brittle fracture.
SUBSTANCE: invention is attributed to the field of electrical equipment. Monoblock body has carrying element 1 in the form of equilateral trapezium along lateral faces 2 and smaller base 3 of which bent bearing part repeating the shape of lateral faces 2 and smaller base 3 of trapezoidal carrying element 1 is welded at right angle. In the first version of invention inside the angle formed by coupled carrying element 1 and bearing part 4 and at right angle to their surfaces, two steel strips 6 and 7 are welded to envelope tower body end portion by their facing surfaces. Ring-shaped part (9, 10) is fixed at ends of strips 6 and 7. In the second version of invention angle seat is welded by its leg outer surface to one of the sides of carrying element outer surface. Angle seat projects in opposite direction to bent bearing part location. In the third version of invention two angle seats are welded by their leg ends at sides of carrying element to its outer surface. Angle seats project in opposite direction to bent bearing part location. Each insulator comprises bearing part with element for insulator attachment, fiber-glass plastic rod attached by on its end to bearing part, head that is fixed on the second end of rod, and insulating body created of fiber-glass plastic around rod between bearing part and head with radial ribs made of silicon rubber.
EFFECT: structure weight reduction.
48 cl, 15 dwg
FIELD: power industry.
SUBSTANCE: linear suspended insulator includes metal cap, metal bar and insulating part, which are connected by means of cured cement-sand binding substance. Insulating part consists of a head and a plate. At least one annular rib is made on lower surface of the plate. Base of thickening of lower head part protrudes behind the edge of lower surface of plate. Thickening is smoothly conjugated to inner side surface of head and to lower plate surface. Height of thickening (Hn), as well as depth of reinforcement (Ho) comprise not less than 2 mm each. Value of conjugation radius of thickening to inner surface of head (Rn) is not less than 3 mm, and width (Bn) of thickening is not less than 6 mm. Base of lower part of the plate edge is of drop shape and is conjugated to projection of rectangular shape.
EFFECT: increase in values of allowable voltage as per level of radiointerference and improvement of operating reliability of garlands of insulators at atmospheric and industrial impurities.
3 cl, 5 dwg
SUBSTANCE: discharger for lightning protection of elements of electrical equipment or a power transmission line comprises an insulating body (1) and a multi-electrode system comprising at least five electrodes (2). Electrodes (2) are mechanically connected with the insulating body (1) and are arranged inside the body (1) with the possibility to form an electric discharge between adjacent electrodes under action of lightning overvoltage. Electrodes (2) exit into discharge chambers (3). Several discharge chambers (3) consist of two joined parts, besides, first parts of discharge chambers (3), where electrodes enter (2), are arranged in the form of holes (4) in the body (1), and the second parts of discharge chambers (3), connected to the first parts are arranged in the form of slots (5), reaching the surface of the body (1).
EFFECT: increased efficiency of lightning protection due to reduction of probability of combining separate torches of arcs of follow current into a single channel.
14 cl, 6 dwg