CN107711820B - Double-arm bird-repellent shielding cover applied to high-voltage overhead line tower pole - Google Patents

Double-arm bird-repellent shielding cover applied to high-voltage overhead line tower pole Download PDF

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Publication number
CN107711820B
CN107711820B CN201710801969.2A CN201710801969A CN107711820B CN 107711820 B CN107711820 B CN 107711820B CN 201710801969 A CN201710801969 A CN 201710801969A CN 107711820 B CN107711820 B CN 107711820B
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shielding cover
cover
shaped middle
middle shielding
repellent
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CN107711820A (en
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陈筱平
陆茂鑫
赵春琛
习严
严圣伟
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State Grid Shanghai Electric Power Co Ltd
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State Grid Shanghai Electric Power Co Ltd
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    • A—HUMAN NECESSITIES
    • A01—AGRICULTURE; FORESTRY; ANIMAL HUSBANDRY; HUNTING; TRAPPING; FISHING
    • A01M—CATCHING, TRAPPING OR SCARING OF ANIMALS; APPARATUS FOR THE DESTRUCTION OF NOXIOUS ANIMALS OR NOXIOUS PLANTS
    • A01M29/00—Scaring or repelling devices, e.g. bird-scaring apparatus
    • A01M29/30—Scaring or repelling devices, e.g. bird-scaring apparatus preventing or obstructing access or passage, e.g. by means of barriers, spikes, cords, obstacles or sprinkled water
    • A01M29/32—Scaring or repelling devices, e.g. bird-scaring apparatus preventing or obstructing access or passage, e.g. by means of barriers, spikes, cords, obstacles or sprinkled water specially adapted for birds, e.g. spikes
    • A—HUMAN NECESSITIES
    • A01—AGRICULTURE; FORESTRY; ANIMAL HUSBANDRY; HUNTING; TRAPPING; FISHING
    • A01M—CATCHING, TRAPPING OR SCARING OF ANIMALS; APPARATUS FOR THE DESTRUCTION OF NOXIOUS ANIMALS OR NOXIOUS PLANTS
    • A01M29/00—Scaring or repelling devices, e.g. bird-scaring apparatus
    • H—ELECTRICITY
    • H02—GENERATION; CONVERSION OR DISTRIBUTION OF ELECTRIC POWER
    • H02G—INSTALLATION OF ELECTRIC CABLES OR LINES, OR OF COMBINED OPTICAL AND ELECTRIC CABLES OR LINES
    • H02G7/00—Overhead installations of electric lines or cables
    • Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
    • Y02—TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINST CLIMATE CHANGE
    • Y02A—TECHNOLOGIES FOR ADAPTATION TO CLIMATE CHANGE
    • Y02A30/00—Adapting or protecting infrastructure or their operation
    • Y02A30/14—Extreme weather resilient electric power supply systems, e.g. strengthening power lines or underground power cables

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  • Life Sciences & Earth Sciences (AREA)
  • Birds (AREA)
  • Engineering & Computer Science (AREA)
  • Insects & Arthropods (AREA)
  • Pest Control & Pesticides (AREA)
  • Wood Science & Technology (AREA)
  • Zoology (AREA)
  • Environmental Sciences (AREA)
  • Catching Or Destruction (AREA)

Abstract

A double-arm bird-repellent shielding cover applied to a high-voltage overhead line tower pole belongs to the field of line protection. A first T-shaped middle shielding cover and a second T-shaped middle shielding cover are arranged at the joint part of a lead and an insulator string; a left gun head cover and a right gun head cover are respectively arranged at two outer open ends of the first T-shaped middle shielding cover and the second T-shaped middle shielding cover along the direction of a wire; a connecting cover is arranged between two opposite opening ends of the inner sides of the first T-shaped middle shielding cover and the second T-shaped middle shielding cover along the direction of the lead; the first T-shaped middle shielding cover, the second T-shaped middle shielding cover, the left gun head cover and the right gun head cover, the first T-shaped middle shielding cover, the second T-shaped middle shielding cover and the connecting cover are fixed/connected into a whole in a plugging or riveting mode. The combination part of the lead and the insulator chain is provided with a defensive shielding cover for insulating shielding, effective isolation is generated between the bird nest and the conductor, the electric insulation distance is increased, and the ground fault of the high-voltage power supply line is avoided. The protection device can be widely applied to the protection field of various high-voltage overhead transmission lines.

Description

Double-arm bird-repellent shielding cover applied to high-voltage overhead line tower pole
Technical Field
The invention belongs to the field of power line protection, and particularly relates to a defensive bird-repelling shielding protection device for a high-voltage transmission overhead line and a tower pole.
Background
The insulator part of the 35kv pole tower in the district of our department adopts a cross arm type line fixing mode, and is characterized in that the head end of the high-voltage insulator chain is connected with a cross arm of a line pole, and the tail end of the high-voltage insulator chain is connected with a wire of an overhead transmission line; in the fixed mode, the high-voltage insulator string (also called an insulating arm) and the wires of the power transmission overhead line are in the same horizontal plane, or the included angle between the plane where the bare wires and the insulator string are positioned and the horizontal plane is smaller than 30 degrees, and the high-voltage insulator string is in a T-shaped connection structure.
The cross arm type connecting structure is very beneficial to nesting of birds.
The district of our department belongs to "urban residents", and birds often use conductive objects such as thin iron wires as nesting materials when nesting. From field surveys, the presence of building iron wires was found to be more or less within nearly every bird nest being viewed.
The cross arm structure of the tower pole is quite favorable for nesting of birds, through on-site observation, the junction of the cross arm and the insulating arm of the tower pole is often selected for nesting of birds, and some bird nests are large, can cover the whole insulating arm and contact with the cable part, so that the electric insulation distance of a power supply circuit is greatly shortened.
In recent years, due to the fact that heavy rain weather is increased and conductors such as iron wires exist, birds nest to easily cause phase-ground short circuit faults of a high-voltage power supply line, and great hidden danger is brought to safe operation of the power supply line.
Various existing bird repelling methods have various defects:
1. chemical smell bird repellent:
the active bird repellent is carried out by adopting various bird repellent agents through smell, firstly, the time for the drug effect to act is short, the bird repellent effect can not be continuously realized, and secondly, the drug effect of the bird repellent agents can be damaged or lose efficacy after rain attack; thirdly, the bird repellent agent needs to be periodically supplemented, so that the workload of line inspection workers is increased; and the addition of the bird repellent agent can be performed after the power supply line fails, so that the normal running time of the existing power supply line is reduced, and the effective running time of a power supply network is influenced.
2. Fan or acousto-optic bird repellent:
the active bird repellent is carried out in the forms of sound, light, shadow and the like, on one hand, a special power supply is needed for driving, the working reliability and the effective working time of the driving power supply limit the normal working time of the bird repellent device; on the other hand, birds have certain adaptability to repeated sound, light and shadow signals, and the bird repelling effect of the repeated sound, light and shadow signals is weakened or reduced after the repeated sound, light and shadow signals are long; on the other hand, because of the existence of mechanical moving parts or electronic circuits in the device, the working reliability of the moving parts or electronic circuits is affected to a certain extent in the field environment, and the whole bird repellent device can not emit sound, light and shadow signals and loses bird repellent effect when serious.
The method or the device which can be sustained and effective, does not increase the inspection workload of field workers and can avoid the ground fault of the high-voltage power supply line caused by bird nesting is found, and is a problem to be solved in field practical work.
Disclosure of Invention
The invention aims to solve the technical problem of providing a double-arm bird-repellent shielding cover applied to a high-voltage overhead line tower pole. The part of the overhead line or the tower pole, which is easy to nest by birds, is provided with the defending type shielding protection device, and the defending type shielding protection mode is adopted, so that on one hand, the difficulty of nesting by birds is increased, and on the other hand, the electric insulation distance between the bird nest and the power supply overhead line, which possibly exists, is increased, and therefore, the electric safety distance of the power supply line is increased, and the occurrence of phase-ground short circuit fault of the high-voltage power supply line is prevented.
The technical scheme of the invention is as follows: the double-arm bird-driving shielding cover comprises a bare conductor of an overhead transmission line and a first insulator string and a second insulator string which are on the same plane with the bare conductor, wherein the head ends of the first insulator string and the second insulator string are connected with a cross arm of the high-voltage overhead line pole, and metal bowls at the tail ends of the first insulator string and the second insulator string are fixedly connected with the bare conductor; the method is characterized in that:
a first T-shaped middle shielding cover and a second T-shaped middle shielding cover are respectively arranged at the joint part of the lead and the first insulator chain and the second insulator chain;
a left gun head cover and a right gun head cover are respectively arranged at two outer open ends of the first T-shaped middle shielding cover and the second T-shaped middle shielding cover along the direction of a wire;
a connecting cover is arranged between two opposite opening ends of the inner sides of the first T-shaped middle shielding cover and the second T-shaped middle shielding cover along the direction of the lead;
the first T-shaped middle shielding cover and the second T-shaped middle shielding cover are of an inverted U-shaped shielding cover structure with a cavity, the upper part of the inverted U-shaped middle shielding cover is provided with a wire accommodating cavity with an open end, and one side of the wire accommodating cavity is provided with a metal bowl accommodating cavity with an open end at the tail end of the insulator string; a first extension skirt edge is arranged below the opening end of the wire accommodating cavity, and the upper part of the first extension skirt edge is correspondingly connected with the opening end of the wire accommodating cavity;
the left and right gun heads are of an inverted U-shaped cover structure with a cavity in the longitudinal direction, the upper part of the inverted U-shaped cover structure is a wire accommodating cavity with an opening end, a second extension skirt edge is arranged below the opening end of the wire accommodating cavity, and the upper part of the second extension skirt edge is correspondingly connected with the opening end of the wire accommodating cavity;
the longitudinal direction of the connecting cover is of an inverted U-shaped cover structure with a cavity, the upper part of the connecting cover is a wire accommodating cavity with an opening end, a third extension skirt edge is arranged below the opening end of the wire accommodating cavity, and the upper part of the third extension skirt edge is correspondingly connected with the opening end of the wire accommodating cavity;
the first T-shaped middle shielding cover, the second T-shaped middle shielding cover, the left gun head cover and the right gun head cover, the first T-shaped middle shielding cover, the second T-shaped middle shielding cover and the connecting cover are fixed/connected into a whole in a plugging or riveting mode.
The double-arm bird-repellent shielding cover is characterized in that a defensive shielding cover is arranged at the joint of the overhead transmission line wire and the horizontal insulator string, metal bowls and bare wire parts at the tail ends of the two insulating arms are insulated and shielded, insulation extension of a designated length is carried out along the direction of the overhead line, the electrical insulation distance between a bird nest and a power supply overhead line is increased, effective isolation is generated between the bird nest and a conductor, and the ground fault of the high-voltage power supply line caused by nesting of birds is avoided.
The double-arm bird-repellent shielding cover can effectively prevent power failure, damage to power equipment and electric shock accidents caused by interphase short circuit or grounding of insulators due to wet flashing, pollution flashover, salt mist chemical gas corrosion, artificial touching, small animals or sundries wiring.
Specifically, the wire accommodating cavity of the first T-shaped middle shielding cover and the second T-shaped middle shielding cover are intersected with the central axis of the metal head accommodating cavity at the tail end of the insulator string.
Or the central axes of the wire accommodating cavity of the first T-shaped middle shielding cover and the central axis of the metal head accommodating cavity of the tail end of the insulator string are mutually perpendicular.
Furthermore, the first T-shaped middle shielding cover, the second T-shaped middle shielding cover, the connecting cover, the left gun head cover and the right gun head cover of the double-arm bird-driving shielding cover are all made of electric insulating silicon rubber with the same components as insulators in the insulator string.
Furthermore, the T-shaped middle shielding cover, the connecting cover, the left gun head cover and the right gun head cover of the double-arm bird-driving shielding cover have smooth outer surfaces.
Specifically, the outer surfaces of the T-shaped middle shielding cover, the connecting cover, the left and right gun covers are higher than the V5 in finish level; or the roughness Ra of the outer surfaces of the T-shaped middle shielding cover and the left and right gun covers is smaller than 25-50 mu m.
The first insulator string and the second insulator string are transversely arranged; and the included angle between the plane where the bare conductor and the first and second insulator strings are positioned and the horizontal plane is smaller than 30 degrees.
Specifically, a plurality of through holes are arranged at the lower parts or the side edge parts of the first prolonged skirt edge of the first T-shaped middle shielding cover, the third prolonged skirt edge of the connecting cover, the second prolonged skirt edges of the left and right gun head covers; in each through hole, a plastic rivet is provided.
Furthermore, water blocking skirts are arranged at the edges of the opening ends of the wire accommodating cavity and the insulator chain tail end metal head accommodating cavity or the first, second and third extension skirts.
Further, for a 35kv pylon line, the specified length is greater than 1.6 meters.
Compared with the prior art, the invention has the advantages that:
1. the metal bowl and the bare conductor part at the tail end of the insulating arm are insulated and shielded by adopting a cover structure, and the insulation extension of a designated length is carried out along the direction of the overhead line, so that the electrical insulation distance between a bird nest and a power supply overhead line, which possibly exists, is increased, effective isolation can be generated between the bird nest and a conductor, and the occurrence of power failure, damage to power equipment and electric shock accidents caused by interphase short circuit or grounding due to wet flashover, pollution flashover, salt mist chemical gas corrosion, artificial touch, small animals or sundries wire bonding of the insulator can be effectively prevented;
2. the protective shielding mode is adopted, the cover structure of the protective shielding type bird nest removing device has a smooth outer surface, so that the bird nest removing difficulty can be increased, the bird nest removing success rate can be reduced, and the bird repelling effect and purpose can be achieved;
3. the defensive insulating shielding working mode is adopted, no additional power supply or power device is needed, the effective working time is long, the power supply of the existing power supply circuit is not affected, the workload of the patrol staff is not increased, the daily maintenance workload is small, and the popularization and the application are convenient.
Drawings
FIG. 1 is a schematic view of a bird repellent device according to the present invention;
FIG. 2 is a schematic side view of the intermediate T-shaped shield of the present invention;
FIG. 3 is a schematic diagram of the front outline structure of the T-shaped middle shielding cover of the present invention;
FIG. 4 is a schematic top plan view of the intermediate shield of the present invention;
FIG. 5 is a schematic side view of the gun head according to the invention;
FIG. 6 is a schematic diagram of the front view of the left and right gun caps of the present invention;
FIG. 7 is a schematic side view of the splice closure of the present invention;
FIG. 8 is a schematic diagram of the front view of the splice closure of the present invention;
FIG. 9 is a schematic view of the plastic rivet of the present invention;
fig. 10 is a schematic diagram of an assembled structure of the bird repellent device of the present invention.
In the figure, 1 is an insulator chain, 2 is a bare wire, 3 is a T-shaped middle shielding cover, 3A is an insulator chain tail end metal bowl accommodating cavity, 3B is a wire accommodating cavity, 3C is a first extension skirt, 4 is a connecting cover, 4A is a wire accommodating cavity, 4B is a third extension skirt, 5-1 is a right gun head cover, 5-2 is a left gun head cover, 5A is a wire accommodating cavity, 5B is a second extension skirt, 6 is a water blocking skirt, 7 is a through hole, 8A is a plastic rivet, 8B is a butt end of the rivet, 8C is a butt end of the rivet, and L is a specified length.
Detailed Description
The invention is further described below with reference to the accompanying drawings.
In fig. 1, the technical scheme of the invention provides a double-arm bird-driving shielding cover applied to a high-voltage overhead line pole, wherein the double arms comprise bare wires of an overhead transmission line and first and second insulator strings which are on the same plane with the bare wires, the head ends of the first and second insulator strings are connected with a cross arm of the high-voltage overhead line pole, and metal bowls at the tail ends of the first and second insulator strings are fixedly connected with the bare wires; the first insulator string and the second insulator string are transversely arranged; and the included angle between the plane where the bare conductor and the first and second insulator strings are positioned and the horizontal plane is smaller than 30 degrees.
The invention is characterized in that:
a first T-shaped middle shielding cover 3-1 and a second T-shaped middle shielding cover 3-2 are respectively arranged at the joint part of a bare wire (also called as a wire for short) 2 and the first insulator chain 1-1 and the second insulator chain 1-2;
two outer open ends of the first T-shaped middle shielding cover and the second T-shaped middle shielding cover along the direction of the lead are respectively provided with a left gun head 5-1 and a right gun head 5-2;
a connecting cover 4 is arranged on a bare conductor between two opposite opening ends along the direction of the conductor on the inner sides of the first T-shaped middle shielding cover and the second T-shaped middle shielding cover;
the longitudinal direction of the first T-shaped middle shielding cover and the second T-shaped middle shielding cover is of an inverted U-shaped shielding cover structure with a cavity, the upper part of the inverted U-shaped middle shielding cover is provided with a wire accommodating cavity 3B with an open end, and one side of the wire accommodating cavity is provided with a metal bowl accommodating cavity 3A with an open end at the tail end of the insulator string; a first extension skirt 3C is arranged below the opening end of the wire accommodating cavity, and the upper part of the first extension skirt is correspondingly connected with the opening end of the wire accommodating cavity;
the left and right gun heads are of an inverted U-shaped cover structure with a cavity in the longitudinal direction, the upper part of the inverted U-shaped cover structure is a wire accommodating cavity 5A with an opening end, a second extension skirt 5B is arranged below the opening end of the wire accommodating cavity, and the upper part of the second extension skirt is correspondingly connected with the opening end of the wire accommodating cavity;
the longitudinal direction of the connecting cover is of an inverted U-shaped cover structure with a cavity, the upper part of the connecting cover is a wire accommodating cavity 4A with an opening end, a third extension skirt 4B is arranged below the opening end of the wire accommodating cavity, and the upper part of the third extension skirt is correspondingly connected with the opening end of the wire accommodating cavity;
the first T-shaped middle shielding cover, the second T-shaped middle shielding cover, the left gun head cover and the right gun head cover, the first T-shaped middle shielding cover, the second T-shaped middle shielding cover and the connecting cover are fixed/connected into a whole in a plugging or riveting mode.
According to the double-arm bird-repellent shielding cover, the defensive shielding cover is arranged at the joint of the overhead transmission line wire and the horizontal insulator string, the metal bowl and the bare wire part at the tail end of the insulating arm are insulated and shielded, insulation extension with a specified length is carried out along the direction of the overhead line, the electrical insulation distance between the bird nest and the power supply overhead line is increased, effective isolation is generated between the bird nest and the conductor, and the ground fault of the high-voltage power supply line caused by nesting of birds is avoided;
the double-arm bird-repellent shielding cover can effectively prevent power failure, damage to power equipment and electric shock accidents caused by interphase short circuit or grounding of insulators due to wet flashing, pollution flashover, salt mist chemical gas corrosion, artificial touching, small animals or sundries wiring.
In fig. 2 to fig. 4, the first and second T-shaped middle shielding covers have an inverted U-shaped cover structure with a cavity in the longitudinal direction, the upper part of the first and second T-shaped middle shielding covers is a wire accommodating cavity 3B with an open end, and a metal bowl accommodating cavity 3A with an open end at the tail end of the insulator string is arranged at one side of the wire accommodating cavity; a first extension skirt 3C is arranged below the opening end of the wire accommodating cavity, and the upper part of the first extension skirt is correspondingly connected with the opening end of the wire accommodating cavity;
as can be seen, the wire receiving cavity intersects the central axis of the insulator string end metal head receiving cavity.
Or the central axes of the wire accommodating cavity and the insulator chain tail end metal head accommodating cavity are mutually perpendicular.
In fig. 5 to 6, the left and right gun caps are of inverted U-shaped cap structure with a cavity in the longitudinal direction, the upper portion of the cap is a wire accommodating cavity 5A with an open end, a second extension skirt 5B is arranged below the open end of the wire accommodating cavity, and the upper portion of the second extension skirt is correspondingly connected with the open end of the wire accommodating cavity.
As can be seen from fig. 1, the left and right gun caps structurally belong to mirror symmetry structures, and for brevity, a schematic structural diagram of the left and right gun caps is not provided.
As can be seen from fig. 5, the left and right covers are known as covers in the habit of field workers, since they are similar in shape to the conventional pistol holsters.
The component features an upper wire receiving chamber with an open end and a lower second elongate skirt, but the elongate skirt is of different longitudinal dimensions. In order to match with the first extension skirt of the T-shaped middle shielding cover, the longitudinal dimension of the extension skirt of one side of the wire accommodating cavity, which is close to the T-shaped middle shielding cover, is larger; the longitudinal dimension of the extended skirt of the side of the wire receiving cavity remote from the T-shaped intermediate shield is smaller to reduce unnecessary material consumption.
As can be seen from fig. 7 and 8, the required splice closure has an upper portion with an open ended wire receiving cavity 4A, a lower portion with a third elongate skirt 4B,
as can be seen from fig. 2, 3, 6 and 8, a plurality of through holes 7 are provided at the lower parts of the extended skirts of the first and second T-shaped middle shielding covers, the connecting covers and the left and right gun covers; in each through hole a plastic rivet 8 is provided.
Obviously, each extension skirt in the technical scheme is actually of a double-piece structure, namely, the extension skirt consists of two single extension skirts with the same shape, and the upper ends of the two extension skirts are respectively and correspondingly connected with two ends of the opening end below the wire accommodating cavity or the insulator chain tail end metal bowl accommodating cavity; the lower parts of the extension skirts are provided with through holes, and the lower parts of the two extension skirts which are correspondingly arranged are riveted together by plastic rivets to form a closed insulating cover structure together with a wire accommodating cavity or an insulator chain tail end metal bowl accommodating cavity at the upper part of the extension skirts.
For convenience of description, when each of the two sets of extension skirts is referred to, it is simplified to a certain extension skirt to simplify the description, and the meaning thereof will be fully understood by those skilled in the art without causing an unclear or uncertain condition.
Furthermore, a water-blocking skirt 6 is arranged at the edge of the wire accommodating cavity, the insulator chain tail end metal head accommodating cavity or the extension skirt.
The water-blocking skirt is a skirt with a convex-concave structure on the surface, and rainwater is prevented from entering the inside of the insulating cover structure through the convex-concave structure on the surface, so that the water-blocking skirt is similar to a water-blocking sealing strip used on an automobile in function and structure.
When the device is actually installed on site, the first T-shaped middle shielding cover, the second T-shaped middle shielding cover, the connecting cover, the left gun head cover and the right gun head cover are inserted onto the metal heads at the tail ends of bare wires or insulator strings from top to bottom by utilizing the opportunity of power failure overhaul of the lines at each operation point along the lower openings of the extension skirt edges of the first T-shaped middle shielding cover, the second T-shaped middle shielding cover, the left gun head cover and the right gun head cover, and the T-shaped middle shielding cover, the connecting cover, the left gun head cover and the right gun head cover are inserted into a whole; then, the pointed end 8C of the plastic rivet 8A shown in fig. 9 is inserted into each through hole 7 of the extending skirt, and due to the existence of the butt end 8B of the plastic rivet, the two extending skirt edges positioned at the two sides of the opening end below the first and second T-shaped middle shielding covers, the connecting covers and the left and right gun covers are fixed into a whole, and the T-shaped middle shielding covers, the connecting covers and the left and right gun covers are connected into a whole, so that the whole field installation work is finished.
As can be seen from fig. 10, the total length of the bird repellent device along the line direction after assembly is the protectable length of the whole device, i.e. the predetermined length L.
For a 35kv pylon line, the specified length L may be greater than 1.6 meters, preferably 1.8 meters.
The first T-shaped middle shielding cover, the second T-shaped middle shielding cover, the connecting cover, the left gun head cover and the right gun head cover of the double-arm bird-driving shielding cover are all made of electric insulating silicon rubber with the same components as insulators in the insulator string.
Furthermore, the first T-shaped middle shielding cover, the second T-shaped middle shielding cover, the connecting cover, the left gun head cover and the right gun head cover of the double-arm bird-driving shielding cover are smooth in outer surfaces.
Specifically, the outer surfaces of the first T-shaped middle shielding cover, the second T-shaped middle shielding cover, the connecting cover, the left gun head cover and the right gun head cover are higher than V5 in finish level; or the roughness Ra of the outer surfaces of the first T-shaped middle shielding cover, the second T-shaped middle shielding cover, the left gun head cover and the right gun head cover is smaller than 25-50 mu m.
According to the technical scheme, the smoothness of the outer surface of the protective cover is improved, the probability of success in attaching foreign objects is reduced, the difficulty in nesting of birds is increased, the success rate of nesting of birds can be reduced, and then the effect and the purpose of driving birds are achieved.
According to the technical scheme, the insertable cover type insulating cover structure is arranged at the part, which is easy to nest by birds, of the high-voltage transmission line, the metal bowl and the bare conductor part at the tail end of the insulating arm are insulated and shielded, and the insulating extension with the designated length is carried out along the direction of the overhead line, so that the electric insulation distance between the bird nest and the power supply overhead line is increased, and effective isolation can be generated between the bird nest and the conductor.
According to the technical scheme, a defensive insulating shielding protection mode is adopted, a connecting cover with a wire accommodating cavity, a left gun head cover and a right gun head cover are arranged on a bare wire, and a first T-shaped middle shielding cover and a second T-shaped middle shielding cover are arranged at the joint of a metal bowl at the tail end of an insulating arm and the bare wire; on one hand, the difficulty of nesting birds is increased, and on the other hand, the electrical insulation distance between the bird nest and the power supply overhead line, which possibly exists, is increased, so that the electrical safety distance of the power supply line is increased, and the occurrence of phase-ground short circuit faults of the high-voltage power supply line is prevented.
The defensive insulating shielding working mode of the technical scheme does not need to be attached with a power supply or a power device, and has long effective working life; the power supply of the existing power supply line is not affected, the workload of the inspection staff is not increased, the daily maintenance workload is small, and the popularization and the application are convenient.
The invention can be widely applied to the protection field of various high-voltage overhead transmission lines adopting horizontal insulator strings.

Claims (9)

1. The double-arm bird-driving shielding cover comprises a bare conductor of an overhead transmission line and a first insulator string and a second insulator string which are on the same plane with the bare conductor, wherein the head ends of the first insulator string and the second insulator string are connected with a cross arm of the high-voltage overhead line pole, and metal bowls at the tail ends of the first insulator string and the second insulator string are fixedly connected with the bare conductor; the method is characterized in that:
a first T-shaped middle shielding cover and a second T-shaped middle shielding cover are respectively arranged at the joint part of the lead and the first insulator chain and the second insulator chain;
a left gun head cover and a right gun head cover are respectively arranged at two outer open ends of the first T-shaped middle shielding cover and the second T-shaped middle shielding cover along the direction of a wire;
a connecting cover is arranged between two opposite opening ends of the inner sides of the first T-shaped middle shielding cover and the second T-shaped middle shielding cover along the direction of the lead;
the first T-shaped middle shielding cover and the second T-shaped middle shielding cover are of an inverted U-shaped shielding cover structure with a cavity, the upper part of the inverted U-shaped middle shielding cover is provided with a wire accommodating cavity with an open end, and one side of the wire accommodating cavity is provided with a metal bowl accommodating cavity with an open end at the tail end of the insulator string; a first extension skirt edge is arranged below the opening end of the wire accommodating cavity, and the upper part of the first extension skirt edge is correspondingly connected with the opening end of the wire accommodating cavity;
the left and right gun heads are of an inverted U-shaped cover structure with a cavity in the longitudinal direction, the upper part of the inverted U-shaped cover structure is a wire accommodating cavity with an opening end, a second extension skirt edge is arranged below the opening end of the wire accommodating cavity, and the upper part of the second extension skirt edge is correspondingly connected with the opening end of the wire accommodating cavity;
the longitudinal direction of the connecting cover is of an inverted U-shaped cover structure with a cavity, the upper part of the connecting cover is a wire accommodating cavity with an opening end, a third extension skirt edge is arranged below the opening end of the wire accommodating cavity, and the upper part of the third extension skirt edge is correspondingly connected with the opening end of the wire accommodating cavity;
the first T-shaped middle shielding cover, the second T-shaped middle shielding cover, the left gun head cover and the right gun head cover, the first T-shaped middle shielding cover, the second T-shaped middle shielding cover and the connecting cover are fixed/connected into a whole in a plugging or riveting mode;
according to the double-arm bird-repellent shielding cover, the defensive shielding cover is arranged at the joint of the overhead transmission line wire and the horizontal insulator string, the metal bowl and the bare wire at the tail ends of the two insulating arms are insulated and shielded, insulation extension with a specified length is carried out along the direction of the overhead line, the electrical insulation distance between the bird nest and the power supply overhead line is increased, effective isolation is generated between the bird nest and the conductor, and the ground fault of the high-voltage power supply line caused by nesting of birds is avoided;
the double-arm bird-repellent shielding cover can prevent power failure, damage to power equipment and electric shock accidents caused by interphase short circuit or grounding due to wet flashing, pollution flashover, salt mist chemical gas corrosion, artificial touch, small animals or sundries wiring of the insulator.
2. The dual arm bird repellent shield for a high voltage overhead line tower pole of claim 1 wherein said wire receiving cavities of said first and second T-shaped intermediate shields intersect the central axis of the insulator string end metal head receiving cavity.
3. The double-arm bird-repellent shielding cover for high voltage overhead line poles according to claim 1, wherein the wire receiving cavities of the first and second T-shaped intermediate shielding covers are perpendicular to the central axis of the insulator string terminal metal head receiving cavity.
4. The double-arm bird-repellent shielding cover applied to the high-voltage overhead line pole, which is disclosed in claim 1, is characterized in that the first T-shaped middle shielding cover, the second T-shaped middle shielding cover, the connecting cover, the left gun head cover and the right gun head cover of the double-arm bird-repellent shielding cover are all made of electric insulating silicon rubber with the same components as insulators in insulator strings.
5. The double-arm bird-repellent shielding cover for high voltage overhead line poles according to claim 1, wherein the T-shaped middle shielding cover, the connection cover, the left and right gun covers of the double-arm bird-repellent shielding cover have smooth outer surfaces.
6. The double-arm bird-repellent shielding cover for high voltage overhead line poles according to claim 5, wherein the outer surfaces of the T-shaped middle shielding cover, the connecting cover, the left and right gun covers have a finish level higher than 5; or the roughness Ra of the outer surfaces of the T-shaped middle shielding cover and the left and right gun covers is smaller than 25-50 mu m.
7. The double-arm bird-repellent shielding cover for high voltage overhead line poles according to claim 1, wherein a plurality of through holes are arranged at the lower parts or side edge parts of the first prolonged skirt edge of the first T-shaped shielding cover, the third prolonged skirt edge of the connecting cover, the second prolonged skirt edge of the left and right gun head covers; in each through hole, a plastic rivet is provided.
8. The double-arm bird-repellent shield for high voltage overhead line poles according to claim 1, wherein a water-blocking skirt is provided at the opening end of the wire accommodation chamber, the insulator string terminal metal head accommodation chamber, or the edges of the first, second, and third extension skirt.
9. The dual arm bird repellent shield for use with a high voltage overhead line tower according to claim 1, wherein said designated length is greater than 1.6 meters for a 35kv tower line.
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