RU199591U1 - BIRD PROTECTOR FOR POWER LINES - Google Patents

Abstract

The utility model relates to the field of electric power engineering, in particular, to bird protection devices of the so-called barrier type, designed to prevent the pollution of strings of insulators of overhead power lines with the products of the vital activity of birds, as well as to prevent the death of birds from electric shock. The device is made in the form of a split protective screen with sealing elements. Sealing of the connector is ensured by making it with a folded lock connection. The center hole is sealed with a split bushing. The sleeve is made with a flange, and the longitudinal section is made tangentially to the circumference of the inner surface of the sleeve and is oriented at an angle of 25-35 ° relative to the longitudinal axis of the sleeve. The technical result of the proposed utility model is to improve the sealing properties along the parting line, as well as the zone of the central hole at the junction of the screen with the end piece.

Description

The utility model relates to the field of electric power engineering, in particular, to bird protection devices of the so-called barrier type, designed to prevent the pollution of strings of insulators of overhead power transmission lines with products of the vital activity of birds, as well as to prevent the death of birds from electric shock.

A known device (RF patent for invention No. 2569500) for protecting a suspended electrical insulator, which has an insulating body and end fittings, is capable of being connected to electrical installation elements, of which the lower one has an oblong shape, from electrical shorting of the end fittings and / or electrical installation elements connected to the insulator birds and / or products of their vital activity. The device is made of a dielectric in the form of a skirt made of sectors connected by the corner ends and equipped with a fastening element on the insulator or an electrical installation element connected to the upper end of the insulator. The skirt is also provided with an element for fixing the orientation of the skirt relative to the insulator. The element for fixing the orientation of the skirt is made in the form of a lock or an adhesive, welded or other joint, or is made with the possibility of fixing the orientation of the skirt due to friction forces.

The disadvantages of this device include the complexity of the design, the need for a multi-stage assembly technique, a complex manufacturing and assembly technology, the duration of installation due to installation on an insulator with a given orientation.

It is also known a bird protection device (RF patent for utility model No. 193763) for a suspended insulator of power lines, which contains an insulating element made of a dielectric, consisting of four identical parts, which, when assembled, form a spherical segment with overlapping parts, one edge of each part is made at the same time with a patch overlapping the mating line by 2-5 cm with a small gap above the surface of the adjacent part, the outer diameter of the spherical segment in plan is 350-550 mm, and the depth / height is 70-100 mm; on the lower concave side there are stiffening ribs, as well as means for detachable fastening of parts to each other, which are formed by a protrusion with a cylindrical pin on one part and a protrusion with a counter hole on another part, and the length of the finger exceeds the size of the protrusion with a hole by 2-5 cm; along the edges of the four parts along the axis of the spherical segment, the outer sides of the L-shaped section are made integrally with the parts, forming a complete cylindrical side with a vertical generatrix with the possibility of covering it when mounted with a clamp, and an inner horizontal support ring; the cylindrical surface of the collar of each part is aligned along the entire height with a removable sleeve having the shape of an annular sector in the plan, and one edge of the sleeve is made with a cover overlapping the mating line of the sleeves, each sleeve is equipped with at least one elastic latch with the possibility of fastening to the cylindrical collar , and along the convex cylindrical surface of the sleeve a groove is made with the possibility of alignment with the horizontal support ring of the cylindrical rim, while the bushings assembled form a cylindrical bore along the axis of the insulating element with the ability to cover the insulator end piece.

The disadvantages of this device also include the complexity of the design, which causes an increase in the time spent on the installation of the device and related errors and defects in the installation of the installation time of the device.

Closest to the claimed utility model is the technical solution disclosed in the PRC patent No. 104200935. The poultry protection device made of dielectric material consists of two parts, forming a spherical segment in the assembly. The protective device (screen) is installed on the upper end of the suspension insulator. The parts of the screen are overlapped and fastened together. After fastening the parts of the screen, a central hole is formed, which covers the end piece.

In order to seal the adjacent portions of the screen parts, a sealing tape is laid between them (indicated by 26 in Fig. 4 and in Fig. 5 of the cited document). Part of the tape is led out into the central hole to ensure a more snug fit of the screen on the end piece.

The disadvantage of this solution is insufficient tightness along the connection line of the two parts of the screen and insufficient tightness of the interface between the screen and the upper end piece. Leakage of joints leads to contamination of insulators during operation and deterioration of their electrical insulating properties.

The technical problem, the solution of which is provided by the claimed utility model, is to reduce the degree of contamination of the insulator during operation. Reducing contamination is achieved by sealing the joint of the screen parts and the junction of the screen with the end piece.

The technical result of the proposed utility model is to improve the sealing properties along the parting line, as well as the zone of the central hole at the junction of the screen with the end piece.

This is achieved by the fact that in the inventive bird protection device a bird protection device for a suspended insulator of power lines, containing a protective screen and sealing means, where the protective screen is detachable with the formation of a central hole for placement in the last upper end fitting and the central hole is formed by the inner walls of a cylindrical element oriented along the axis of the screen, and the sealing means are located both along the parting line and in the central hole of the protective screen, according to the utility model, the means for sealing the connector are made in the form of a lock connection with fastening tightening elements, and the sealing means located in the central hole is made in the form of an elastic sleeve with a longitudinal section oriented at an angle to the hub axis.

In this case, it is preferable to make the lock connection in the form of a folded lock connection.

It is also preferable to make the sleeve with a sealing flange designed to prevent the penetration of liquid contaminants along the surface of the end piece. The sealing flange seals the horizontal surface (end face) of the cylindrical walls of the central hole. An additional sealing effect can be achieved by adding a lower sealing flange to the sleeve.

In addition, it is advisable that the longitudinal section is made tangentially to the circumference of the inner surface of the sleeve and is oriented at an angle of 25-35 degrees relative to the longitudinal axis of the sleeve. This design provides better sealing performance while maintaining the elastic properties of the sleeve.

The utility model is illustrated by drawings:

fig. 1 is a general view of the bird protection device;

fig. 2 is a general view of a segment of the bird protection device;

fig. 3 - General view of the bird protection device, top view

fig. 4 - split seal sleeve.

The drawings show the following elements:

1 - screen segment of the bird protection device;

2 - central hole;

3 - connecting groove;

4 - connecting ledge;

5 - retainer

6 - fastening element

7 - sealing sleeve;

8 is a section made on the side surface of the sleeve;

9 - sleeve flange.

The poultry protection device is intended for suspended rod electrical insulators with a voltage of 33-320 kV of power lines. Suspension insulators include an insulating body and end fittings that are connected to the power transmission tower and wires. The bird protection device is installed on the top end of the insulator or on the insulating suspension element. The device can also be used for a string of insulators. The poultry protection device for the suspended insulating unit of power lines contains a protective screen, consisting of segments 1 and sealing means. The protective screen is made detachable with the formation of a central hole 2 for placing in the latter the upper element of the insulating unit, a string of insulators. Sealing means are placed both along the parting line of the segments 1 and in the central hole 2 of the protective screen. The central opening is formed by the inner walls of the protective screen element designed to hold the sealing means located in the central opening 2, in particular the sealing sleeve 7. The sealing means located in the central opening 2 is made to enclose the upper element of the insulating unit, and the connector sealing means is made in the form a lock connection with a groove 3 and a projection 4 and fastening tightening elements 6, for example, a folded lock connection.

The screen of the bird protection device in the preferred embodiment consists of two identical segments 1, which, when assembled, form a protective screen in the form of a lateral surface of a cone with an obtuse angle at the apex and a central hole 2. Each segment 1 in the radial direction has locking elements: groove 3 and projection 4. In addition, each segment 1 is provided with fastening elements 6, made, for example, in the form of bosses, for connecting the segments 1 using fasteners, for example, "bolt-nut". The dimensions of the mating surfaces of the groove 3 and the protrusion 4 are selected taking into account the formation of an interference fit, the elastic mutual deformation of the groove 3 and the protrusion 4 when they are pulled together by the fasteners 6. Elastic deformation ensures the formation of a gapless tight connection of the segments 1 to each other.

The elastic sealing sleeve 7 has a cut 8 made on the lateral surface tangentially to the circumference of the cylindrical surface of the sleeve and at an angle of about 30 ° to its vertical axis. Depending on the installation location, surface properties of the element on which the sleeve 7 is located, the angle of inclination can be changed in the range of ± 5 ° and can be 25-35 degrees relative to the longitudinal axis of the sleeve. The sleeve 7 is equipped with a sealing flange 9 designed to prevent the penetration of liquid contaminants along the surface of the upper element of the insulating assembly.

For the manufacture of a bird protection device for a suspended insulator of power lines, a polymer electrical insulating weather-resistant plastic (polyamide, polycarbonate, polypropylene) is preferably used.

The implementation of the purpose of the bird protection device for the suspension insulator is as follows.

Split screen design provides ease of installation. The sleeve 7 is made of polymeric material, therefore it is easily opened along the cut 8, which makes it possible to place it on the upper end cap of the polymeric rod electrical insulator or on some other element of the insulating suspension. Then, the segments 1 are brought to the sleeve 7 and tightly brought together end-to-end along the radii (groove 3 of one into the ledge 4 of the second). The latch 5 ensures reliable and tight placement of the sleeve 7 in the central hole 2. Bolts are placed in the holes of the bosses, the nuts are tightened, ensuring the tightness of the protective screen. The tightness of the protective shield along the central hole, at the junction of the shield with the end piece, is ensured by a split sleeve, and along the parting line of the segments 1 by elastic deformation of the lock connection.

Claims (5)

1. Bird protection device for a suspended insulating unit of power lines, containing a protective screen and sealing means, where the protective screen is split with the formation of a central hole for placement in the last upper element of the insulating unit, and the sealing means are placed both along the split line and in the central hole a protective shield, characterized in that the central opening is formed by the inner walls of the protective shield element designed to hold the sealing means placed in the central opening, while the sealing means located in the central opening is made to enclose the upper element of the insulating unit, and the connector sealing means is made in in the form of a lock connection with fastening tightening elements. 2. The device according to claim 1, characterized in that the sealing means located in the central hole is made in the form of an elastic sleeve with a longitudinal section oriented at an angle to the axis of the sleeve. 3. The device according to claim 1, characterized in that the lock connection is made in the form of a folded lock connection. 4. A device according to claim 1 or 2, characterized in that the sleeve is equipped with a sealing flange designed to prevent the penetration of liquid contaminants along the surface of the upper element of the insulating unit. 5. The device according to claim 4, characterized in that the longitudinal section is made tangentially to the circumference of the inner surface of the sleeve and is oriented at an angle of 25-35 ° relative to the longitudinal axis of the sleeve.

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