RU210185U1 - Casing made of electrical insulating material for horizontal-turn type disconnector - Google Patents

Abstract

The utility model relates to horizontal-swivel type disconnectors and can be used to reduce maintenance accidents and also to protect birds when they land on open current-carrying parts or grounded non-insulated metal elements of the disconnector design. The casing for the horizontal rotary type disconnector contains two shells. Each of the shells consists of vertical and horizontal parts (see figure 1, 2, 3). Each of the shells is made as a single integral part. The horizontal parts of the shells are tightly coupled to each other in the working position on the current-carrying elements of the disconnector due to the elastic properties and provide a secure fit on the disconnector (see figure 5). Shells are equipped with protective covers. The protective covers of each contact output are made with a cone-shaped transition surface to the cuff, covering the wire connected to the contact with a gap (see Fig.4, 7). Each case is made with a cutout at the bottom for a snug fit on the vertical part of the corresponding shell. Covers and horizontal parts of each of the casing shells are made with a cross section in the form of an open quadrangle (see Fig. 1, 2, 3, 4). The technical result consists in the performance of the casing of its function while increasing the reliability of the protection of disconnectors and reducing the accident rate of maintenance by protecting against birds when they land on open current-carrying parts. 10 ill.

Description

The utility model relates to horizontal-swivel type disconnectors and can be used to reduce maintenance accidents and also to protect birds when they land on open current-carrying parts or grounded non-insulated metal elements of the disconnector design.

Known disconnector high voltage horizontally-swivel type, including a frame, rotary support-rod porcelain insulators, current-carrying knife, contact leads and additional thin-rod polymer insulators mounted directly on the porcelain insulators. Thin rod insulators contain a screen located at a high potential. The use of a thin-rod polymer insulator makes it possible to increase the reliability of operation and the safety of maintenance of disconnectors both in dry and in contaminated and wet states (see RF patent No. 2094885, IPC H01H 31/30 (1995.01), 1997).

At the same time, there is a need to increase the reliability of the operation of disconnectors and reduce the accident rate of maintenance by protecting them from birds when they land on open current-carrying parts and also to protect birds from electric shock.

Known disconnector horizontal-swivel type of reduced accident rate with bird-proof properties, containing a frame, swivel porcelain insulators, a fixed contact, a current-carrying knife and contact leads for connecting wires. The disconnector is equipped with a detachable casing made of electrically insulating material, the parts of which are made with the possibility of loose mating with each other in the working position on the current-carrying elements of the disconnector. The casing of each contact output is made in the form of a cylinder with a cone-shaped transitional surface to a cylindrical cuff, covering the wire connected to the contact with a gap. The casings of the fixed contact and the current-carrying knife are made in the form of semi-cylinders covering them and open from below with an axis along the current-carrying knife, made integral with the semi-cylindrical clamps and combined with them to provide an open area around the contact leads. The clamps are installed with the possibility of semi-girth of the metal heads of the rotary and fixed insulators. Along the line of rotation of the current-carrying knife, its semi-cylindrical casing is provided with a protruding bar, which in the working position closes the corresponding recess in the casing of the fixed contact. Each cylindrical casing in the working position is installed to ensure full coverage of the open area around the contact output and partial overlap of the semi-cylindrical casing adjacent to it (prototype - RF patent No. 157427, IPC H01H 31/00 (2006.01), 2015).

The disadvantage of the prototype is the lack of reliability, tk. in working condition, there is a possibility of inconsistencies between the mating parts of the cylindrical casings, i.e. the formation of gaps into which the limbs of birds or their metabolic products can get, due to the fact that the manufacture of rather complex cuts occurs along a cylindrical surface, and / or the displacement of insulators relative to each other horizontally and vertically.

The technical problem solved by the utility model is to expand the range of protective covers for disconnectors and reduce the accident rate by protecting against birds when they land on open current-carrying parts.

The technical problem posed is solved due to the fact that in a well-known casing made of electrical insulating material for a horizontally rotary type disconnector, consisting of two shells, consisting of vertical and horizontal parts, made with the possibility of interfacing horizontal parts in the working position and equipped with protective covers, at the same time, the covers of each contact output are made with a cone-shaped transition surface to the cuff, covering with a gap the wire connected to the contact, according to the utility model, the covers and the horizontal parts of each of the casing shells are made with a cross section in the form of an open quadrangle, the horizontal parts of the shells have the possibility of tight mating between itself in the working position on the current-carrying elements of the disconnector, and each case is equipped with a cutout in the lower part for a tight fit on the vertical part of the corresponding shell.

The technical result from the use of all the essential features of the utility model is that the casing performs its function while increasing the reliability of the protection of disconnectors and reducing the accident rate of maintenance by protecting them from birds when they land on open current-carrying parts.

Execution of covers and horizontal parts of each of the shells of the casing with a cross section in the form of an open quadrangle, while ensuring tight mating between the horizontal parts of the shells in the working position on the current-carrying elements of the disconnector and making each case with a cutout in the lower part, for a snug fit on the vertical part of the corresponding shell, allows the casing to perform its functions. This simplifies the implementation of the necessary mating protrusions and cutouts, provides a tight mating of the casing parts, which increases the reliability of the protection of the disconnectors and reduces the accident rate by providing reliable protection from birds when they land on open current-carrying parts.

Figure 1 - casing shell for movable contact.

Figure 2 - casing shell for fixed contact.

Figure 3 - interconnected casing shell without covers.

Figure 4 - shell cover.

Fig.5 - casing assembly.

Fig.6 - a shell without a cover for a fixed contact, installed on the disconnector insulator.

Fig.7 - installation of the cover on the wire.

Fig.8 - assembled casing shells for disconnector insulators.

Fig.9 - casing assembly for the three contacts of the disconnector.

Fig.10 - disconnector in working condition without casings.

All parts of the casing for the horizontal rotary disconnector are made of electrical insulating material, which provides protection against moisture, dust, negative and positive temperatures. The elastic properties of the material must be sufficient to preserve the product with minor impacts during the assembly of the casing, and also so that the mating parts of the casing can be installed on the insulator heads as elastic latches. For example, ABS plastic (acrylonitrile butadiene styrene, along with SAN, ASA, SBS copolymers), modified polypropylene, modified polyethylene, correspond to the specified requirements for the operation and manufacture of the casing. The material combines high rigidity, has elastic properties and impact resistance, withstands low temperatures, has good electrical insulating properties, resistance to weak acids, alkali and salt solutions, alcohols, water, atmospheric influences.

The casing for the horizontal rotary type disconnector contains two shells 1, 2. Each of the shells consists of vertical 3-1, 3-2 and horizontal 4-1, 4-2 parts (see Fig.1, 2, 3). Each of the shells 1, 2 is made as a single piece. The horizontal parts 4-1, 4-2 of the shells 1, 2 are tightly coupled to each other in the working position on the current-carrying elements of the disconnector due to the elastic properties and provide a secure fit on the disconnector (see Fig.5). Shells 1, 2 are provided with protective covers 5. Protective covers 5 of each contact output are made with a cone-shaped transition surface 6 to the cuff 7, covering the wire 8 connected to the contact with a gap (see Fig.4, 7). Each case 5 is made with a cutout 9 in the lower part for a snug fit on the vertical part 3-1, 3-2 of the corresponding shell 1, 2. Cases 5 and horizontal parts 4-1, 4-2 of each of the shells 1, 2 are made with cross section in the form of an open quadrangle (see Fig. 1, 2, 3, 4).

The utility model can be used both for the three-pole apparatus shown in FIG. 10, and for a two-pole (not shown), since the casing is installed on each pole separately.

Each pole of the disconnector has one fixed 10 and one movable 11 insulator (see Fig.10).

The vertical parts 3-1, 3-2 of the shells 1 and 2 cover the metal heads 12 and 13 of the fixed 10 and 11 movable insulators, respectively, and are held on them by means of clamps (conditionally not shown). On the back side of the vertical 3-1, 3-2 parts of each of the shells 1,2, a cutout 12 is made to receive the wire 8 (see Fig. 3, 6). The horizontal parts 4-1, 4-2 of each shell 1 and 2 are made in the form of boxes with a cross section in the form of an open quadrangle with an axis of symmetry along the current-carrying knife 14, open from below and freely enveloping the current-carrying elements 15 and 16 (see Fig. ten).

Installation of a casing on disconnectors of horizontally rotary type.

To install the casing, the power line must be taken out for repair, and in this mode the line is de-energized and grounded.

First, a shell 1 is installed on a fixed insulator 10 (see Fig.6), a wire 8 is threaded to the circuit breaker through a hole 17 in the case 5 (see Fig.7) and the wire 8 is connected to the circuit breaker. Then the cover 5 is lowered along the wire 8, it is turned in such a way that the cutout 9 of the cover closes the cutout 12 in the shell 1 (see Fig.8) and the cover 5 is fixed on the shell 1. To prevent slipping of the cover 5 with the casing along the wire up during wind loads, a limiter is installed on wire 8 (for example, a worm clamp, or a plastic tie, which are conventionally not shown).

Then, a shell 2 is installed on the movable insulator 11 (see Fig. 8), a wire 8 is threaded to the circuit breaker through a hole 17 in the case 5 (see Fig. 7) and the wire 8 is connected to the circuit breaker. The cover 5 is lowered along the wire 8, it is turned in such a way that the cutout 9 of the cover closes the cutout 12 in the shell 2 (see Fig.8) and the cover 5 is fixed on the shell 2. To prevent slipping of the cover 5 with the casing along the wire upwards under wind loads , a limiter is installed on wire 8 (for example, a worm clamp, or a plastic tie, which are conventionally not shown).

When the movable insulator is rotated and the contact blades are brought together on the horizontal rotary type disconnector, the cutout 18 in the horizontal part 4-1 of the shell 1 covers the protruding part 19 of the horizontal part 4-2 of the shell 2, and the cutout 20 of the horizontal part 4-2 of the shell 2 closes the protruding part 21 of the horizontal part 4-1 of the shell 1. In this case, the horizontal parts 4-1, 4-2 of the shells 1, 2 are tightly closed due to the elastic properties, forming a single casing. To improve the reliability of the connection of the horizontal parts 4-1, 4-2 of the shells 1, 2, one of them can be made small protrusions (not shown conventionally).

Under different operating conditions, the wires are fixed on the contact terminals at different angles, including the wires may be below the insulator head.

In the case when the current-carrying wire comes in a vertical direction (at an angle of 30 to 90 degrees), the cutout 9 of the cover 5 is directed towards the casing. When the current-carrying wire is directed horizontally (angle from 0 to 50 degrees), the cutout of the cover 5 is rotated so that the cutout 9 is directed downwards, see Fig. 5.

The disconnector, which is mounted on platforms, on channels, on traverses, on other stable grounded objects, which are most often places for birds to land, provides, complete with an electrical insulating casing, complete protection of birds from electric shock and, accordingly, increases the period of trouble-free operation of power lines. The reliability of operation and the safety of maintenance of the disconnector in contaminated and humid conditions are increased.

The utility model can be manufactured using known materials and standard equipment.

The claimed device can be used to protect birds from high-voltage power lines and protect birds from electric shock.

Claims (1)

Casing made of electrical insulating material for a horizontally rotary type disconnector, containing two shells, consisting of vertical and horizontal parts, made with the possibility of pairing with each other by horizontal parts in the working position and equipped with protective covers, while the covers of each shell are made with a cone-shaped transition surface to the cuff covering the wire with a gap, characterized in that the covers and the horizontal parts of each of the shells of the casing are made with a cross section in the form of an open quadrangle, the horizontal parts of the shells have the possibility of tight mating with each other in the working position on the current-carrying elements of the disconnector, and each case is equipped with a cutout in lower part for a snug fit on the vertical part of the corresponding shell.

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