RU2320042C1 - Polymeric insulator - Google Patents

Abstract

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

Description

The invention relates to electrical engineering, in particular to the design of high-voltage insulators used in conditions of high mechanical stress in high-voltage power lines, contact network of urban transport, on railways.

Known insulator contact network described in the patent of the Russian Federation for invention No. 2115183, 7 IPC H01B 17/00, published July 10, 1998. The invention lies in the fact that in the insulator containing a cylindrical supporting rod with tapered shanks, as well as terminators and bushings, on which the couplings are additionally installed, the inner surfaces of the couplings and bushings are made in the form of truncated cones that are connected to the conical shanks of the rod and face large ends to the ends of the rod. The bushings are made split and mounted on tapered shanks. The couplings are connected to the terminators via an internal cylindrical thread with compression of the rod through split sleeves.

The disadvantage of this device is that the connection of the terminal and the rod with the tapered shanks is carried out by means of a coupling through a cylindrical thread, followed by compression of the polymer rod through split sleeves. Such a connection has low reliability of fastening the terminal to the insulator polymer rod, since with considerable efforts to compress the polymer rod with split sleeves, the surface of the polymer rod mated with the split sleeve can be destroyed, which prevents the insulator from absorbing significant axial loads.

The well-known "Polymer insulator" according to the patent of the Russian Federation No. 2262760, 7MPK НВВ 17/02, adopted as the closest analogue, containing a mechanically strong polymer rod covered by a protective sheath and reinforced with metal current-carrying terminators made in the form of a glass, while it is equipped with a cold curing layer located between the metal current-carrying terminators and the protective sheath, each current-carrying metal terminal is made with a conical inner surface from the side of the open end interfaced with the outer surface of the protective shell made of silicone rubber, the end part of which has the shape of a cone, the bottom of the metal current-carrying terminal is hermetically connected, for example, with glue to the end of the rod, and the side conical wall of the protective shell, a layer of cold-cured glue and the inner conical side surface metal current-carrying terminal jointly pressed.

A disadvantage of the known polymer insulator according to the patent of the Russian Federation No. 2262760, 7MPK Н01В 17/02 is the low reliability of fastening the terminal to the polymer rod due to the press connection of the metal terminal and the polymer rod with a layer of cold-cured adhesive between them. Significant pressing force can lead to destruction of the surface of the polymer rod mated to the terminator, which sharply reduces the bearing capacity of the insulator and does not allow the insulator to absorb significant axial loads.

The claimed invention has the task of increasing the reliability of the polymer insulator as a result of increasing its bearing capacity, caused by the fact that both ends are formed by one part - a ring made of composite material with an optimally organized structure.

The problem in the claimed invention is solved due to the fact that in the polymer insulator containing the insulating rod, lined with tracking protection ribs installed on its outer cylindrical surface, the ends are installed on the ends of the insulation rod, the ends are made of continuous flexible reinforcement impregnated with a binder in the form of a ring consisting of two arcs connected by rectilinear sections, rectilinear sections of the ring are fixed in grooves made on interconnected d a vuh or more of the parts forming an insulating rod, a metal plate is installed on the arc of the ring of each terminator from the inside.

In the polymer insulator, the straight sections of the ring can be fixed in grooves made on two parts glued together, covered by a retaining sleeve, forming an insulating rod, the joint plane of the parts passes through the axes of these straight sections of the ring.

In the polymer insulator, the straight sections of the ring can be fixed in grooves made on the parts glued to each other in the form of an inner rod and an outer pipe forming an insulating rod, the annular joint of which passes through the axis of these straight sections of the ring.

The claimed invention differs from the known technical solution according to RF patent No. 2262760 in that the terminators are made of continuous flexible reinforcement impregnated with a binder in the form of a ring consisting of two arcs connected by straight sections, straight sections of the ring are fixed in grooves made on interconnected two or more parts forming an insulating rod, a metal plate is installed on the arc of the ring of each end piece from the inside.

The indicated difference made it possible to obtain a technical result, namely, it increased the reliability of the polymer insulator as a result of an increase in its bearing capacity, caused by the fact that both terminators are formed by one part — a ring made of a composite material with an optimally organized structure.

Figure 1 shows a polymer insulator, an example is shown when the straight sections of the ring are fixed in grooves made on two parts glued together, covered by a retaining sleeve forming an insulating rod, the joint plane of the parts passes through the axes of these straight sections of the ring.

Figure 2 shows a section of a polymer insulator according to aa of figure 1.

Figure 3 presents a polymer insulator, an example is shown when the straight sections of the ring are fixed in grooves made on the parts glued to each other in the form of an inner rod and an outer pipe forming an insulating rod, the annular joint of which passes through the axis of these rectilinear sections of the ring.

In Fig.4 shows a section of a polymer insulator according to BB Fig.3.

Figure 5 presents a view of the polymer insulator in the direction of arrow In figure 1.

Figure 6 shows a perspective view of a polymer insulator.

The polymer insulator (Fig. 1) contains an insulating rod 1 (Figs. 1-6), lined with tracking protection ribs 2 (Figs. 1-6), mounted on its outer cylindrical surface 3 (Figs. 1-5), at the ends 4 ( 1, 3, 5, 6) of the insulating rod 1, terminators 5 are installed (Figs. 1, 3, 5, 6), while the terminators 5 are made of continuous flexible reinforcement impregnated with a binder in the form of a ring 6 (Fig. 1- 6), consisting of two arcs 7 (Figs. 1, 3, 5, 6) connected by rectilinear sections 8 (Figs. 1-4), rectilinear sections 8 of the ring 6 are fixed in grooves 9 (Figs. 1-4) made on interconnected two or more parts 10 (Figs. 1-6) forming an insulating rod 1, a metal plate 11 is installed on the arc 7 of the ring 6 of each terminal 5 from the inside (Figs. 1, 3, 5, 6).

The straight sections 8 (Fig. 1) of the ring 6 can be fixed in grooves 9 made on two parts 10 glued together, covered by a retaining sleeve 12 (Figs. 1, 2), forming an insulating rod 1, plane 13 (Fig. 2) the junction of the parts 10 passes through the axis 14 (figure 1) of these straight sections 8 of the ring 6.

The straight sections 8 (Fig. 3) of the ring 6 can be fixed in grooves 9 made on the parts 10 glued together, in the form of an inner rod 15 (Fig. 3, 4) and an outer pipe 16 (Fig. 3, 4), forming insulating rod 1, the annular joint 17 (figure 4) which passes through the axis 14 of these straight sections 8 of the ring 6.

The polymer insulator during operation perceives significant tensile forces directed along the axis 18 (Fig.1, 3) of the insulator, and bending moments. The polymer insulator contains terminators 5 made of continuous flexible reinforcement, for example fiberglass or fiberglass, impregnated with a binder, for example epoxy. The terminal 5 is a molded elongated ring 6, consisting of two arcs 7 connected by straight sections 8. The reinforcement used in the manufacture of the terminal 5 should be correctly oriented relative to the loads perceived by the insulator. Therefore, the threads, fibers or bundles forming the reinforcement of the terminators 5 should be located along the axis 18 of the insulator. The continuity of the reinforcement is of great importance, that is, the reinforcement should not have gaps, this ensures the correct uniform distribution of loads in the polymer insulator. In the polymer insulator, both terminal 5 are formed by one piece - a ring 6 made of continuous reinforcement oriented along the axis 18 of the insulator in the direction of the main loads, which can significantly increase its bearing capacity, and therefore reliability. Straight sections 8 of the ring 6 are fixed in grooves 9 made on interconnected two or more parts 10, forming an insulating rod 1, which increases the rigidity of the entire structure of the insulator and allows you to perceive significant bending moments. The straight sections 8 of the ring 6 can be fixed in grooves 9 made on two parts 10 glued together, covered by a retaining sleeve 12 made, for example, of fiberglass impregnated with an epoxy binder (Fig. 1). These two parts 10 and the retaining sleeve 10 form an insulating rod 1, while the plane 13 of the junction of the parts 10 passes through the axis 14 of the straight sections 8 of the ring 6. The straight sections 8 of the ring 6 can also be fixed in the grooves 9 made on the parts 10 glued together in the form of an inner rod 15 and an outer pipe 16, forming an insulating rod 1 (figure 3). The annular joint 17 at such an insulating rod 1 passes through the axis 14 of the straight sections 8 of the ring 6. To reduce wear and to prevent destruction of the terminal 5, made of composite material caused by friction between the terminal 5 and the fastenings to the wires of the high voltage network, on the arc 7 of the ring 6 of each of the terminal 5, a metal plate 11 is installed inside. The outer cylindrical surface 3 of the insulating rod 1 is lined with tracking protection ribs 2 made of silicone (silaxane) re ins.

The invention made it possible to obtain a technical result, namely, to increase the reliability of the polymer insulator as a result of increasing its bearing capacity, caused by the fact that both terminators are formed by one part — a ring made of composite material with an optimally organized structure.

Claims (3)

1. The polymer insulator containing the insulating rod, lined with tracking protection ribs mounted on its outer cylindrical surface, the ends are installed on the ends of the insulation rod, characterized in that the ends are made of continuous flexible reinforcement impregnated with a binder in the form of a ring consisting of two arcs, connected by straight sections, straight sections of the ring are fixed in grooves made on interconnected two or more parts forming an insulating rod Yes, a metal plate is installed on the arc of the ring of each end piece from the inside. 2. The polymer insulator according to claim 1, characterized in that the straight sections of the ring are fixed in grooves made on two parts glued together, covered by a retaining sleeve, forming an insulating rod, the joint plane of the parts passes through the axis of these straight sections of the ring. 3. The polymer insulator according to claim 1, characterized in that the straight sections of the ring are fixed in grooves made on the parts glued to each other in the form of an inner rod and an outer pipe forming an insulating rod, the annular joint of which passes through the axis of these straight sections of the ring.

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