CN109638756A - Anti- bird pest and ice coating resistant device - Google Patents

Anti- bird pest and ice coating resistant device Download PDF

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Publication number
CN109638756A
CN109638756A CN201811631783.8A CN201811631783A CN109638756A CN 109638756 A CN109638756 A CN 109638756A CN 201811631783 A CN201811631783 A CN 201811631783A CN 109638756 A CN109638756 A CN 109638756A
Authority
CN
China
Prior art keywords
baffle
fastener
retaining sheet
snap
gauge
Prior art date
Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
Granted
Application number
CN201811631783.8A
Other languages
Chinese (zh)
Other versions
CN109638756B (en
Inventor
陈佳纬
隆玉福
胡忠伟
肖顺贤
李伟
王剑锋
张明
赵浩翔
刘长胜
杨怀建
陈巍巍
Current Assignee (The listed assignees may be inaccurate. Google has not performed a legal analysis and makes no representation or warranty as to the accuracy of the list.)
HAIXI POWER SUPPLY COMPANY STATE GRID QINGHAI ELECTRIC POWER Co Ltd
State Grid Qinghai Electric Power Co Ltd
Original Assignee
HAIXI POWER SUPPLY COMPANY STATE GRID QINGHAI ELECTRIC POWER Co Ltd
State Grid Qinghai Electric Power Co Ltd
Priority date (The priority date is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the date listed.)
Filing date
Publication date
Application filed by HAIXI POWER SUPPLY COMPANY STATE GRID QINGHAI ELECTRIC POWER Co Ltd, State Grid Qinghai Electric Power Co Ltd filed Critical HAIXI POWER SUPPLY COMPANY STATE GRID QINGHAI ELECTRIC POWER Co Ltd
Priority to CN201811631783.8A priority Critical patent/CN109638756B/en
Publication of CN109638756A publication Critical patent/CN109638756A/en
Application granted granted Critical
Publication of CN109638756B publication Critical patent/CN109638756B/en
Active legal-status Critical Current
Anticipated expiration legal-status Critical

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Classifications

    • HELECTRICITY
    • H02GENERATION; CONVERSION OR DISTRIBUTION OF ELECTRIC POWER
    • H02GINSTALLATION OF ELECTRIC CABLES OR LINES, OR OF COMBINED OPTICAL AND ELECTRIC CABLES OR LINES
    • H02G7/00Overhead installations of electric lines or cables
    • H02G7/16Devices for removing snow or ice from lines or cables
    • AHUMAN NECESSITIES
    • A01AGRICULTURE; FORESTRY; ANIMAL HUSBANDRY; HUNTING; TRAPPING; FISHING
    • A01MCATCHING, TRAPPING OR SCARING OF ANIMALS; APPARATUS FOR THE DESTRUCTION OF NOXIOUS ANIMALS OR NOXIOUS PLANTS
    • A01M29/00Scaring or repelling devices, e.g. bird-scaring apparatus
    • A01M29/30Scaring 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
    • A01M29/32Scaring 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

Landscapes

  • 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

The present invention provides a kind of anti-bird pest and ice coating resistant devices, are related to the ice-covering-proof equipment technical field of the anti-bird pest of overhead transmission line.Anti- bird pest and ice coating resistant device include baffle and Fastener;The center of baffle is equipped with the through-hole matched with composite electric insulator core bar, baffle is equipped with installation seam, installation seam extends to through-hole from the lateral surface of baffle, Fastener is mounted on installation and sews on, Fastener can do the movement close to or far from through-hole in installation seam, by baffle and core rod of insulator clamping or disengagement.It solves in the prior art, birds droppings and ice slush form discharge channel in insulator chain, cause insulator breakdown, the technical issues of bird trouble on transmission line and ice trouble.Baffle of the invention can prevent birds droppings and icing from forming discharge channel, and baffle can be clamped on core rod of insulator by Fastener.

Description

Anti- bird pest and ice coating resistant device
Technical field
The present invention relates to the anti-ice trouble equipment technical field of the anti-bird pest of overhead transmission line, more particularly, to a kind of anti-bird pest and Ice coating resistant device.
Background technique
Composite insulator is the component for hanging conducting wire, is mainly used for hanging conducting wire and conducting wire and shaft tower and the earth is made to insulate Important component.
The full skirt of the composite insulator largely used in current power transmission route is umbrella-shaped structure, and full skirt main function is to protect Plug is protected from climatic effect and galvanic action, and required creepage distance is provided, in use, if it is frequent to encounter birds Movable season, birds defecation fall to forming one section of elongated lower falling bodies, meeting on insulator chain or in a manner of freely falling body Discharge channel is formed around insulator chain;If encountering rain and snow weather, serious ice, snow, ice and snow can be covered on insulator chain Melting the water formed can be combined to form discharge channel with the filth of insulator surface, caused insulator arc-over, directly made when serious At insulator breakdown, can not continue to run.
Existing is mostly installation bird-scaring unit and bird-resistant, and birds are driven in realization, but after a period of time is installed, part Birds have not feared bird-scaring unit, and the bird-resistant installed can also fail to the large birds, however it remains birds are exhausted Above edge the case where defecation;The case where for icing, there are currently no good solutions, to the reliable fortune of composite insulator Row brings very big problem.
Summary of the invention
It is existing in the prior art to solve the purpose of the present invention is to provide a kind of anti-bird pest and ice coating resistant device, bird Class drains retting-flax wastewater deficiency when forming discharge channel and ice dissolution above insulator chain, causes insulator string breakdown, Can not normal use the technical issues of.
A kind of anti-bird pest provided by the invention and ice coating resistant device, including baffle and Fastener;
The center of the baffle is equipped with the through-hole matched with composite electric insulator core bar, and the baffle is equipped with installation seam, The installation seam extends to through-hole from the lateral surface of baffle, and the Fastener is mounted on installation and sews on, the Fastener energy Enough movements done in installation seam close to or far from through-hole, by baffle and core rod of insulator clamping or disengagement.
Further, further include stop part for fixing Fastener;
The side for being equipped with installation seam of the stop part and baffle connects, to prevent movement of the Fastener relative to baffle.
Further, the stop part includes stop tab;
The stop tab is located at one end of the separate through-hole of Fastener, and the stop tab is detachably connected with baffle.
Further, the Fastener includes snap-gauge and blend stop;
The snap-gauge is slidably connected in the installation seam of baffle, and the end face of the blend stop and snap-gauge connects, the blend stop energy It is enough to be connect with stop part, to prevent movement of the snap-gauge relative to baffle.
Further, the snap-gauge is vertically arranged with blend stop.
Further, the stop part includes retaining sheet;
The baffle is equipped with link slot, and the retaining sheet is connected in link slot, one end of the retaining sheet and baffle Link slot at be fixedly connected, the other end of the retaining sheet can be contacted with snap-gauge, prevent the movement of snap-gauge.
Further, the retaining sheet is elastic slice.
Further, the stop part includes elastic component;
One end of the elastic component is located in link slot, and is connect with baffle, the other end and retaining sheet of the elastic component Other end connection so that when clamp moving crosses the other end of retaining sheet, the other end of retaining sheet is lifted under the action of the elastic member It rises, to stop the movement of snap-gauge.
Further, the quantity of the retaining sheet is two, and the quantity of the link slot is two, the retaining sheet connection In link slot, a retaining sheet is located at the side of installation seam, another retaining sheet is located at the other side of installation seam, the connection Slot is correspondingly arranged with retaining sheet.
Further, the side of the close through-hole of the snap-gauge is equipped with arcuate structure.
Anti- bird pest provided by the invention and ice coating resistant device, the center of the baffle is equipped with to match with composite electric insulator core bar The through-hole of conjunction, the baffle are equipped with installation seam, and the installation seam extends to the through-hole at middle part, peace from the lateral surface of baffle Directly pass through installation seam when dress, baffle is connected on core rod of insulator;The Fastener is mounted on installation and sews on, Fastener energy Enough movements done in installation seam close to or far from through-hole are realized by the movement of Fastener to baffle and core rod of insulator Clamping or disengagement are arranged Fastener, guarantee that baffle is stably connected on core rod of insulator, dismantle and easy for installation.
Detailed description of the invention
It, below will be to specific in order to illustrate more clearly of the specific embodiment of the invention or technical solution in the prior art Embodiment or attached drawing needed to be used in the description of the prior art be briefly described, it should be apparent that, it is described below Attached drawing is some embodiments of the present invention, for those of ordinary skill in the art, before not making the creative labor It puts, is also possible to obtain other drawings based on these drawings.
Fig. 1 is the structural schematic diagram of the first anti-bird pest provided in an embodiment of the present invention and ice coating resistant device;
Fig. 2 is the structural schematic diagram of the baffle of second provided in an embodiment of the present invention anti-bird pest and ice coating resistant device;
Fig. 3 is the main view of second provided in an embodiment of the present invention anti-bird pest and ice coating resistant device;
Fig. 4 is the structural schematic diagram of second provided in an embodiment of the present invention anti-bird pest and ice coating resistant device.
Icon: 11- baffle;12- Fastener;13- stop part;111- through-hole;112- installation seam;113- link slot;121- Snap-gauge;122- blend stop;131- stop tab;132- retaining sheet.
Specific embodiment
Technical solution of the present invention is clearly and completely described below in conjunction with attached drawing, it is clear that described implementation Example is a part of the embodiment of the present invention, instead of all the embodiments.Based on the embodiments of the present invention, ordinary skill Personnel's every other embodiment obtained without making creative work, shall fall within the protection scope of the present invention.
In the description of the present invention, it should be noted that such as occur term " center ", "upper", "lower", "left", "right", The orientation or positional relationship of the instructions such as "vertical", "horizontal", "inner", "outside" is to be based on the orientation or positional relationship shown in the drawings, Be merely for convenience of description of the present invention and simplification of the description, rather than the device or element of indication or suggestion meaning must have it is specific Orientation, be constructed and operated in a specific orientation, therefore be not considered as limiting the invention.In addition, such as there is term " One ", " second ", " third " are used for descriptive purposes only and cannot be understood as indicating or suggesting relative importance.
In the description of the present invention, it should be noted that unless otherwise clearly defined and limited, term " peace such as occur Dress ", " connected ", " connection " shall be understood in a broad sense, for example, it may be being fixedly connected, may be a detachable connection, or integrally Connection;It can be mechanical connection, be also possible to be electrically connected;Can be directly connected, can also indirectly connected through an intermediary, It can be the connection inside two elements.For the ordinary skill in the art, above-mentioned art can be understood with concrete condition The concrete meaning of language in the present invention.
The present invention provides a kind of anti-bird pest and ice coating resistant device, the anti-bird pest and ice coating resistant device include 11 He of baffle Fastener 12;The center of the baffle 11 is equipped with the through-hole 111 matched with composite electric insulator core bar, and the baffle 11 is equipped with Installation seam 112, the installation seam 112 extend to through-hole 111 from the lateral surface of baffle 11, and the Fastener 12 is mounted on On dress seam 112, the Fastener 12 can do movement close to or far from through-hole 111 in installation seam 112, by baffle 11 with Core rod of insulator clamping or disengagement.
As shown in Figs 1-4, the center of the baffle 11 is equipped with through-hole 111, and the right side of the baffle 11 is equipped with installation seam 112, the installation seam 112 extends to through-hole 111 from the right side of baffle 11, and the Fastener 12 is mounted on installation seam In 112, the Fastener 12 can do movement close to or far from through-hole 111 in installation seam 112 so that baffle 11 with it is compound Core rod of insulator clamping or disengagement;Baffle 11 is set on the sub- top of insulator string, can prevent birds droppings or ice slush from directly acting on Onto insulator string, the damage to insulator string is avoided, ensure that the normal use of insulator string;Using Fastener 12 and gear The mode that plate 11 is slidably connected enables anti-bird pest and ice coating resistant device to be quickly installed in each voltage class composite insulator On, there is generality;Meanwhile anti-bird pest and ice coating resistant device structure are simple, it is at low cost.
Specifically, when in use, Fastener 12 and baffle 11 are detached from first and are placed, stitch 112 for baffle 11 by installation It is mounted on core rod of insulator, Fastener 12 is mounted in installation seam 112 later, by moving Fastener 12 to the left, is made The left side for obtaining Fastener 12 is bonded with through-hole 111, realizes the clamping to core rod of insulator, realizes baffle 11 and core rod of insulator It is fixedly connected;When needing to dismantle on baffle 11, Fastener 12 is moved to the right, so that Fastener 12 and baffle 11 are detached from, it is real Existing baffle 11 divides with the de- of core rod of insulator, dismantles and easy for installation.
It should be noted that device can fundamentally prevent bird excrement from insulating when insulator chain top is installed Decline around substring full skirt, discharge channel can not be formed, plays the role of anti-bird pest;Secondly by multiple anti-bird pests and can prevent covering Ice production apparatus distributing installation on the insulator, can increase retting-flax wastewater, greatly prevent to form discharge channel when ice dissolution, subtract Few ice trouble tripping, guarantees that transmission line of electricity operates normally.
It should also be noted that, the surface of whole device is covered with hydrophobicity coating, the insulating properties of better lifting device Performance and used life.
Further, further include stop part 13 for fixing Fastener 12;The stop part 13 is equipped with baffle 11 The side connection of installation seam 112, to prevent Fastener 12 relative to the movement of baffle 11.
As shown in Figs 1-4, the stop part 13 is connected on the right side of baffle 11, for preventing Fastener 12 along baffle 11 Movement so that baffle 11 and core rod of insulator are fixedly connected.
Further, the stop part 13 includes stop tab 131;The stop tab 131 is located at the separate logical of Fastener 12 The one end in hole 111, and the stop tab 131 is detachably connected with baffle 11.
As shown in Figure 1, the stop tab 131 is connected to the right side of Fastener 12, stop tab 131 and the right side of baffle 11 are adopted Be connected with, when Fastener 12 is moved to the position of through-hole 111, i.e., by core rod of insulator clamping when, using bolt by backstop Piece 131 is fixedly connected on baffle 11, is realized the fixation clamping of baffle 11 and core rod of insulator;It directlys adopt and is bolted, It dismantles and easy for installation.
It should be noted that the bolt is that nylon material is made.
Further, the Fastener 12 includes snap-gauge 121 and blend stop 122;The snap-gauge 121 is slidably connected at baffle 11 Installation seam 112 in, the blend stop 122 is connect with the end face of snap-gauge 121, and the blend stop 122 can be connect with stop part 13, with Prevent movement of the snap-gauge 121 relative to baffle 11.
As in Figure 2-4, the lateral surface of the snap-gauge 121 is equipped with recessed groove, and the installation of the baffle 11 stitches the two of 112 Side is equipped with protrusion, and the protrusion is connect with recessed groove, and snap-gauge 121 is slidably connected along the installation seam 112 of baffle 11;Institute Blend stop 122 is stated to be connected on the upper surface of snap-gauge 121, blend stop 122 can be connect with stop part 13, when Fastener 12 be moved to it is logical The position in hole 111, i.e., by core rod of insulator clamping when, stop part 13 prevent blend stop 122 movement, realize to core rod of insulator with The clamping of baffle 11.
Further, the snap-gauge 121 is vertically arranged with blend stop 122.
As shown in Figure 3-4, the snap-gauge 121 is vertically arranged with blend stop 122, so that the left and right sides of snap-gauge 121 moves speed Consistent and uniform force is spent, guarantees the two sides clamping to core rod of insulator simultaneously of snap-gauge 121.
Further, the stop part 13 includes retaining sheet 132;The baffle 11 is equipped with link slot 113, the retaining Piece 132 is connected in link slot 113, is fixedly connected at one end of the retaining sheet 132 and the link slot 113 of baffle 11, described The other end of retaining sheet 132 can be contacted with snap-gauge 121, prevent the movement of snap-gauge 121.
As shown in Figure 3-4, the side for being equipped with installation seam 112 of the baffle 11 is equipped with link slot 113, the retaining sheet 132 are connected in link slot 113, and the right end of the retaining sheet 132 is connected in the link slot 113 of baffle 11, the retaining sheet 132 left end can be connect with the right end of snap-gauge 121, to prevent the movement of snap-gauge 121;Link slot 113 and retaining sheet are set 132, it can also realize the prevention mobile to snap-gauge 121.
Further, the retaining sheet 132 is elastic slice.
The retaining sheet 132 may be configured as elastic slice, when pushing Fastener 12 to move to the left, in the effect of blend stop 122 Under, the left end of retaining sheet 132 is depressed, when the left position more than retaining sheet 132 is moved in the continuation of Fastener 12 to the left, only It moves back piece 132 to lift under the action of elasticity, the right side of blend stop 122 is stopped, blend stop 122 can not move to the right, realize The clamping of Fastener 12 and core rod of insulator.
Further, the stop part 13 includes elastic component;One end of the elastic component is located in link slot 113, and with Baffle 11 connects, and the other end of the elastic component is connect with the other end of retaining sheet 132, so that when snap-gauge 121 is moved through retaining The other end of the other end of piece 132, retaining sheet 132 is lifted under the action of the elastic member, to stop the movement of snap-gauge 121.
The stop part 13 can also include elastic component, and the elastic component is spring, and the lower end of the elastic component is connected to In link slot 113, the upper end of the elastic component is connect with the lower end surface of the left end of retaining sheet 132, when push Fastener 12 to the left When side is mobile, under the action of blend stop 122, the left end of retaining sheet 132 is depressed, and elastic component is compressed, when Fastener 12 continues When moving the left position more than retaining sheet 132 to the left, retaining sheet 132 lifts under the action of the elastic force of elastic component, to gear The right side of item 122 is stopped, and blend stop 122 can not move to the right, realizes the clamping of Fastener 12 and core rod of insulator.
Further, the quantity of the retaining sheet 132 is two, and the quantity of the link slot 113 is two, the retaining Piece 132 is connected in link slot 113, and a retaining sheet 132 is located at the side of installation seam 112, another retaining sheet 132 is located at peace The other side of dress seam 112, the link slot 113 are correspondingly arranged with retaining sheet 132.
As in Figure 2-4, the front side of installation seam 112 is arranged in a retaining sheet 132, and the setting of another retaining sheet 132 exists The rear side of installation seam 112, front side clamping of the retaining sheet 132 of front side to blend stop 122, the retaining sheet 132 of rear side is to blend stop 122 Rear side clamping, 122 front and rear sides face uniform stressed of blend stop realize the balanced clamping to blend stop 122.
Further, the side of the close through-hole 111 of the snap-gauge 121 is equipped with arcuate structure.
As shown in Figs 1-4, the left side of the snap-gauge 121 is equipped with arcuate structure, the structure of the arcuate structure and through-hole 111 It is correspondingly arranged, clamping can be carried out to core rod of insulator, avoid the abrasion to core rod of insulator.
Finally, it should be noted that the above embodiments are only used to illustrate the technical solution of the present invention., rather than its limitations;To the greatest extent Pipe present invention has been described in detail with reference to the aforementioned embodiments, those skilled in the art should understand that: its according to So be possible to modify the technical solutions described in the foregoing embodiments, or to some or all of the technical features into Row equivalent replacement;And these are modified or replaceed, various embodiments of the present invention technology that it does not separate the essence of the corresponding technical solution The range of scheme.

Claims (10)

1. a kind of anti-bird pest and ice coating resistant device, which is characterized in that including baffle and Fastener;
The center of the baffle is equipped with the through-hole matched with composite electric insulator core bar, and the baffle is equipped with installation seam, described Installation seam from the lateral surface of baffle extends to through-hole, and the Fastener is mounted on installation and sews on, and the Fastener can be The movement close to or far from through-hole is done in installation seam, by baffle and core rod of insulator clamping or disengagement.
2. anti-bird pest according to claim 1 and ice coating resistant device, which is characterized in that further include for fixing Fastener Stop part;
The side for being equipped with installation seam of the stop part and baffle connects, to prevent movement of the Fastener relative to baffle.
3. anti-bird pest according to claim 2 and ice coating resistant device, which is characterized in that the stop part includes stop tab;
The stop tab is located at one end of the separate through-hole of Fastener, and the stop tab is detachably connected with baffle.
4. anti-bird pest according to claim 2 and ice coating resistant device, which is characterized in that the Fastener includes snap-gauge and gear Item;
The snap-gauge is slidably connected in the installation seam of baffle, and the end face of the blend stop and snap-gauge connects, and the blend stop can be with Stop part connection, to prevent movement of the snap-gauge relative to baffle.
5. anti-bird pest according to claim 4 and ice coating resistant device, which is characterized in that the snap-gauge is vertical with blend stop to be set It sets.
6. anti-bird pest according to claim 4 and ice coating resistant device, which is characterized in that the stop part includes retaining sheet;
The baffle is equipped with link slot, and the retaining sheet is connected in link slot, one end of the retaining sheet and the company of baffle It is fixedly connected at access slot, the other end of the retaining sheet can be contacted with snap-gauge, prevent the movement of snap-gauge.
7. anti-bird pest according to claim 6 and ice coating resistant device, which is characterized in that the retaining sheet is elastic slice.
8. anti-bird pest according to claim 6 and ice coating resistant device, which is characterized in that the stop part includes elastic component;
One end of the elastic component is located in link slot, and is connect with baffle, the other end of the elastic component and retaining sheet it is another One end connection, so that the other end of retaining sheet is lifted under the action of the elastic member when clamp moving crosses the other end of retaining sheet, with Stop the movement of snap-gauge.
9. anti-bird pest according to claim 4 and ice coating resistant device, which is characterized in that the quantity of the retaining sheet is two A, the quantity of the link slot is two, and the retaining sheet is connected in link slot, and a retaining sheet is located at the one of installation seam Side, another retaining sheet are located at the other side of installation seam, and the link slot is correspondingly arranged with retaining sheet.
10. anti-bird pest according to claim 4 and ice coating resistant device, which is characterized in that the close through-hole of the snap-gauge Side is equipped with arcuate structure.
CN201811631783.8A 2018-12-27 2018-12-27 Bird damage and ice coating prevention device Active CN109638756B (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
CN201811631783.8A CN109638756B (en) 2018-12-27 2018-12-27 Bird damage and ice coating prevention device

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
CN201811631783.8A CN109638756B (en) 2018-12-27 2018-12-27 Bird damage and ice coating prevention device

Publications (2)

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CN109638756A true CN109638756A (en) 2019-04-16
CN109638756B CN109638756B (en) 2020-07-07

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Citations (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN201260054Y (en) * 2008-07-16 2009-06-17 安徽省电力公司安庆供电公司 Bird prevention blocking board for electricity transmission line
CN201608007U (en) * 2009-12-23 2010-10-13 新疆金田野科技开发有限公司 Bird dung prevention shield
WO2011044024A1 (en) * 2009-10-07 2011-04-14 Tyco Electronics Corporation Wildlife guard cover for electrical installations
CN104091658A (en) * 2014-06-30 2014-10-08 国家电网公司 Large 500kV bar-shaped suspended composite insulator anti-icing-flashover umbrella skirt
CN203910366U (en) * 2014-05-14 2014-10-29 国家电网公司 Supporting china bottle big umbrella skit in high voltage transformer substation

Patent Citations (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN201260054Y (en) * 2008-07-16 2009-06-17 安徽省电力公司安庆供电公司 Bird prevention blocking board for electricity transmission line
WO2011044024A1 (en) * 2009-10-07 2011-04-14 Tyco Electronics Corporation Wildlife guard cover for electrical installations
CN201608007U (en) * 2009-12-23 2010-10-13 新疆金田野科技开发有限公司 Bird dung prevention shield
CN203910366U (en) * 2014-05-14 2014-10-29 国家电网公司 Supporting china bottle big umbrella skit in high voltage transformer substation
CN104091658A (en) * 2014-06-30 2014-10-08 国家电网公司 Large 500kV bar-shaped suspended composite insulator anti-icing-flashover umbrella skirt

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