CN115281179B - Detachable snake device of preventing - Google Patents
Detachable snake device of preventing Download PDFInfo
- Publication number
- CN115281179B CN115281179B CN202210861150.6A CN202210861150A CN115281179B CN 115281179 B CN115281179 B CN 115281179B CN 202210861150 A CN202210861150 A CN 202210861150A CN 115281179 B CN115281179 B CN 115281179B
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- Prior art keywords
- outer ring
- inner ring
- base
- snake
- ring
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Classifications
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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
-
- 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
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 invention discloses a detachable snake-proof device, relates to a snake-proof device, and particularly relates to a detachable snake-proof device for a cement pole of a steel pipe pole. The inner ring and the outer ring are two semi-cylindrical structural members, the base is semi-annular, and the inner ring is fixed on the base; the outer ring is sleeved outside the inner ring; the diameter of the outer circle of the base is larger than that of the bottom of the outer ring, so that the bottom of the outer ring is propped against the upper end of the base, and the outer ring is supported by the base; the outer ring is not fixed with the base and the inner ring. The device can be used for effectively preventing snakes from climbing on cylindrical transmission towers such as steel pipe poles and cement poles, can be flexibly disassembled, and provides safer and simpler snake-preventing measures for the operation and maintenance of a transmission line.
Description
Technical Field
The invention discloses a detachable snake-proof device, relates to a snake-proof device, and particularly relates to a detachable snake-proof device for a cement pole of a steel pipe pole.
Background
When birds fall on feet on the high-voltage transmission line or when bird eggs are in the bird nest, the snakes can be attracted to the tower. When the snake is on the pole and food is obtained, the body of the snake becomes cumbersome, resting above the pole. When the snakes digest food, the temperature of the tower body of the tower possibly increases due to solar radiation, the snakes can select to move to the composite insulator string with lower temperature, so that the insulator string is wound by the snakes and short-circuited, single-phase short-circuit faults occur on the power transmission line, and serious threat is caused to stable operation of the power transmission line. The detachable snake-proof device is installed on the tower body of the transmission line tower, the snake-proof device can be utilized to effectively prevent the snakes from climbing the transmission tower, and the occurrence of power failure accidents caused by climbing the transmission tower by the snakes is reduced. But the umbrella-shaped snake-proof device widely used at present can only hinder part of snake climbing towers and can hinder power transmission line personnel from climbing towers for maintenance operation, and the acupuncture-type snake-proof device can only hinder part of larger snake climbing towers, and sharp acupuncture can also cut the snake skin, so that certain limitation exists. The event of climbing the towers by snakes still happens at time, and the ideal effect cannot be achieved.
Disclosure of Invention
The invention aims to provide the detachable snake-proof device for preventing snakes from climbing on cylindrical transmission towers such as steel pipe rods, cement rods and the like, and meanwhile, the detachable snake-proof device can be flexibly detached, so that safer and simpler snake-proof measures are provided for the operation and maintenance of a transmission line.
In order to achieve the above purpose, the present invention adopts the following technical scheme:
the detachable snake-proof device comprises an inner ring, an outer ring and a base, wherein the inner ring and the outer ring are two semi-cylindrical structural members, the base is semi-annular, and the inner ring is fixed on the base; the outer ring is sleeved outside the inner ring; the diameter of the outer circle of the base is larger than that of the bottom of the outer ring, so that the bottom of the outer ring is propped against the upper end of the base, and the outer ring is supported by the base; the outer ring is not fixed with the base and the inner ring.
The inner ring consists of two semi-cylindrical inner ring sheets, and two vertical inner and outer ring connecting grooves are formed in the outer side annular wall of each inner ring sheet; protruding inner ring piece connecting devices are arranged on two sides of the inner ring piece and are used for connecting the two inner ring pieces; the connecting holes are formed in the inner ring piece connecting device, and the corresponding connecting holes are fixed by the two inner ring pieces through buckles, the binding belts or the screws, so that the connection between the inner ring pieces is realized.
The outer ring consists of two semi-cylindrical outer ring pieces; the two sides of the outer ring piece are respectively provided with an outer ring piece connecting device, the outer ring piece connecting devices are outer ring piece connectors and outer ring piece connecting grooves which are arranged at two sides of the outer ring piece at intervals, the outer ring piece connectors protrude out of the two sides of the outer ring piece, and the outer ring piece connecting grooves are concavely arranged at the two sides of the outer ring piece; the outer ring piece connecting devices of the two outer ring pieces form a male and female matching mode.
The outer edge of outer ring piece connector is pasted and is had powerful film, when outer ring piece connector and outer ring piece coupling groove connect, tear the film protective layer and can realize the zonulae occludens of outer ring piece connector and outer ring piece coupling groove, can protect the inboard smoothness of outer loop like this, also can guarantee the fastness of connection.
The outer ring of the base is provided with a base connecting hole, the circumference of the lower part of the inner ring is provided with an inner ring connecting hole, threads are arranged in the base connecting hole and the inner ring connecting hole, and the inner ring connecting hole and the base connecting hole are connected through bolts.
For convenient installation, the base is formed by connecting two semicircular base sheets, and the two base sheets are connected in an adhesive or bolt mode.
In order to reduce friction between the inner ring and the outer ring when in use, sliding balls or rollers with proper sliding size are filled in the inner ring and outer ring connecting grooves. When the outer ring is stressed, the outer ring is contacted with the sliding beads in the inner ring and outer ring connecting grooves, and the friction surface is small due to small contact area; meanwhile, when the sliding beads are stressed to rotate, the outer ring can also rotate more easily, so that the rotating speed of the outer ring is increased, and the snakes are prevented from obtaining stable connection points on the outer ring.
A drainage groove is formed in the base to prevent water accumulation.
Umbrella type edges are adopted at the bottom edge of the base to prevent snakes from falling off and hanging on the base and to play a part of snake blocking role.
For dust prevention, a dust-proof ring is connected to the upper part of the inner ring, and the dust-proof ring is connected with the inner ring through dust-proof ring connecting holes arranged on the upper parts of the dust-proof ring and the inner ring by bolts.
For convenient installation, the dust ring comprises two semicircular dust ring pieces, and the two dust ring pieces are connected in an adhesive mode.
The outer ring is easy to age and wear due to the fact that the outer ring is greatly influenced by environment, and the outer ring is made of plastic materials with oxidation resistance, light weight, smooth surface and enough strength; the plastic outer ring sheet only considers the convenience of installation and disassembly, and does not consider the possibility of repeated use.
Working principle: the base of the snake preventing device can support the outer ring on the tower body of the tower; the outer ring is made of plastic materials with oxidation resistance, light weight, smooth surface and sufficient strength, can bear winding stress of snakes without obvious deformation, can rotate along with movement of the snakes, so that the snakes cannot rise straightly, the body of the snakes is wound on the snake preventing device, and the function of the snake preventing device is better exerted; umbrella type edges are adopted at the bottom edge of the lower end base to prevent snakes from falling and hanging on the lower end base and to play a part of snake blocking effect.
The beneficial effects of the invention are as follows:
1. the device utilizes basic physics law, utilizes the self gravity of the snakes and the outer ring to prevent the snakes from climbing the tower, and utilizes the acceleration generated by the freely rotatable outer ring to counteract the advancing force of the snakes, thus preventing the snakes from climbing the tower in various environmental conditions; and protects snakes from scratch and stab injury as much as possible, and protects ecological integrity.
2. The detachable snake preventing device has no influence on the climbing operation, occupies a small tower area, and can stride over the snake preventing device when climbing operators climbing by using the climbers; the outer ring of the detachable snake preventing device has enough strength and bearing with the base, and the snake preventing device can be trampled when a climbing operator ascending by the climbers performs climbing operation;
3. the device is a detachable snake-proof device and can be installed in a running tower in a region with serious snake damage.
Drawings
The invention will be further described with reference to the accompanying drawings in which:
FIG. 1 is a schematic view of an exploded construction of the apparatus of the present invention;
FIG. 2 is a schematic view of the inner ring structure of the device of the present invention;
FIG. 3 is a schematic view of the outer ring structure of the device of the present invention;
FIG. 4 is a schematic view of the base structure of the device of the present invention;
FIG. 5 is a schematic view of the dust ring structure of the device of the present invention;
FIG. 6 is a schematic view 1 of the device of the present invention in use;
FIG. 7 is a schematic illustration of a multiple inner loop long connection of the apparatus of the present invention;
FIG. 8 is a schematic view of the device of the present invention in use 2;
FIG. 9 is a graph of diameter versus component diameter (in top view) for the apparatus of the present invention;
fig. 10 is a schematic diagram of the sliding bead of fig. 1 replaced with a roller.
In the figure: 1. 1-1 parts of inner rings, 1-2 parts of inner ring sheets, 1-3 parts of inner ring and outer ring connecting grooves, 1-4 parts of inner ring sheet connecting devices, 1-5 parts of connecting holes and 1-5 parts of dustproof ring connecting holes;
2. the outer ring, 2-1, outer ring piece, 2-2, outer ring piece connecting device, 2-3, outer ring piece connector, 2-4, outer ring piece connecting groove;
3. 3-1 parts of a base, 3-2 parts of a base sheet and a base connecting hole;
4. a sliding bead, a 5, a drainage groove;
6. 6-1 parts of dustproof rings, 6-2 parts of dustproof ring sheets and dustproof ring connecting holes;
7. the tower, 8, special connecting piece, 9, roller.
Detailed Description
The invention will now be described in detail with reference to the drawings and to specific embodiments.
Referring to the drawings, the detachable snake preventing device comprises an inner ring 1, an outer ring 2 and a base 3, wherein the inner ring 1 and the outer ring 2 are two semi-cylindrical structural members, the base 3 is semi-annular, and the inner ring 1 is fixed on the base 3; the outer ring 2 is sleeved outside the inner ring 1; the diameter of the outer circle of the base 3 is larger than that of the bottom of the outer ring 2, so that the bottom of the outer ring 2 is propped against the upper end of the base 3, and the outer ring 2 is supported by the base 3; the outer ring 2 is not fixed with the base 3 and the inner ring 1.
The inner ring 1 consists of two semi-cylindrical inner ring pieces 1-1, and two vertical inner and outer ring connecting grooves 1-2 are formed in the outer side annular wall of the inner ring piece 1-1; protruding inner ring piece connecting devices 1-3 are arranged on two sides of the inner ring piece 1-1, connecting holes 1-4 are formed in the inner ring piece connecting devices 1-3, and the corresponding connecting holes 1-4 are fixed by the two inner ring pieces 1-1 through buckles, binding belts or screws, so that the inner ring pieces 1-1 are connected.
The outer ring 2 is composed of two semi-cylindrical outer ring pieces 2-1; the two sides of the outer ring piece 2-1 are respectively provided with an outer ring piece connecting device 2-2, the outer ring piece connecting devices 2-2 are outer ring piece connectors 2-3 and outer ring piece connecting grooves 2-4 which are arranged at two sides of the outer ring piece 2-1 at intervals, the outer ring piece connectors 2-3 protrude out of the two sides of the outer ring piece 2-1, and the outer ring piece connecting grooves 2-4 are concavely arranged at the two sides of the outer ring piece 2-1; the outer ring piece connecting devices of the two outer ring pieces 2-1 form a male and female matching mode.
The base 3 is formed by connecting two semicircular base plates 3-1; the outer ring of the base is provided with a base connecting hole 3-2, meanwhile, the lower circumference of the inner ring 1 is provided with an inner ring connecting hole corresponding to the lower circumference, threads are arranged in the base connecting hole 3-2 and the inner ring connecting hole, and the inner ring connecting hole is connected with the base connecting hole 3-2 through bolts; a drainage groove 5 is arranged on the base 3 to prevent water accumulation; the umbrella type edge is adopted at the bottom edge of the base 3 to prevent snakes from falling and hanging on the base and to play a part of snake blocking role.
In order to reduce friction between the inner ring 1 and the outer ring 2 in use, in this embodiment, the inner and outer ring connection grooves 1-2 are filled with sliding beads 4 of suitable size, and the sliding beads 4 will not fall once they are embedded in the inner and outer ring connection grooves 1-2. When the outer ring is stressed, the outer ring 2 is contacted with the sliding beads 4 in the inner and outer ring connecting grooves 1-2, and the friction surface is small due to small contact area; meanwhile, when the sliding balls 4 are stressed to rotate, the outer ring 2 can also rotate more easily, so that the rotating speed of the outer ring 2 is increased, and the snakes are prevented from obtaining stable connection points on the outer ring. Referring to fig. 10, in actual use, the inner and outer ring connecting grooves 1-2 may also be fitted with rollers 9, the rollers 9 being rotatable in the inner and outer ring connecting grooves; the roller 9 and the sliding bead 4 are made of rust-resistant metal.
The upper part of the inner ring 1 is connected with a dust-proof ring 6, the dust-proof ring 6 is connected with the inner ring 1 through dust-proof ring connecting holes 6-2 arranged on the upper parts of the dust-proof ring 6 and the inner ring 1, and the dust-proof ring is connected with the inner ring 1 through bolts. For convenient installation, the dust-proof ring 6 is composed of two semicircular dust-proof ring pieces 6-1.
When the device is used, two inner ring plates 1-1 are fixed on a pole tower 7 through an inner ring plate connecting device 1-2, and slide beads 4 with proper sizes are filled in an inner ring connecting groove 1-2 and an outer ring connecting groove 2; then the base 3 is arranged on the tower 7, so that the upper part of the base 3 is fixedly connected with the inner ring 1; finally, the outer ring 2 is sleeved outside the inner ring 1, and the device is installed.
When the snake climbs the tower, it will encounter the device of the invention mounted on the tower 7. If the snake wants to climb upwards, first the snake head needs to cross the base 3 and contact the outer ring 2. At this time, the smooth surface of the outer ring 2 makes it necessary for the snakes to exert a large force to maintain their own balance. However, as the outer ring 2 is an unstable component, the snake makes the outer ring 2 rotate and slide on the tower 7 due to a large force, so that the snake head cannot obtain a stable climbing pole, the snake head can lose balance, and part of the snake cannot continue to stabilize the climbing pole. The rest of the snake will continue to climb the tower, but due to the smoothness and instability of the outer ring 2, when the snake body is in contact with the device of the invention, the device needs to be tightly wound with a larger force to stably climb the tower 7, and the outer ring 2 is pulled upwards together with the snake body. When the snake trunk cannot support the weight of the outer ring 2 and the snake body wound thereon, the outer ring 2 falls onto the chassis 3 together with the snake body wound thereon. The above process is repeated while the snake body moves upward. Most snakes in this in-process all can drop owing to physical weakness or losing stability, and the snake that exists in some areas is more nimble, and the strength of truck is stronger, can try many times and upwards stretch snake head direct perpendicular even, need lengthen this vertical height who prevents snake device this moment.
Referring to fig. 7 and 8, embodiments of the present invention are provided with a plurality of stacked devices, and the plurality of stacked devices are provided with bolts or special connectors, so that the snake-proof height can be increased, and the snake-proof effect can be doubled. The amplifying component in fig. 7 is a special connecting piece, and the special connecting piece is provided with a small hole, the small hole is matched with the connecting hole 1-4 on the inner ring piece connecting device 1-3 of the inner ring 1 in size, and a screw is convenient to penetrate and fix in use.
When the outer ring 2 is detached, the key part of the inner ring 1 can be avoided, and the outer ring can be cut off by using a sharp tool. Or the hot air gun is used for continuously blowing the double-sided film to ensure that the temperature reaches the highest use temperature and the double-sided film is disabled.
With reference to fig. 9, attention is paid to the diameter relationship of the components in the actual production of the device of the present invention. In the figure, the diameter of the tower is approximately equal to the inner diameter of the inner ring and the outer diameter of the inner ring, the diameter of the dustproof ring is approximately equal to the diameter of the inner ring of the outer ring and the diameter of the inner ring of the outer ring, the diameter of the top surface of the base is approximately equal to the diameter of the bottom surface of the base; the diameter of the bottom surface of the base and the diameter of the pole tower are smaller than the distance between two feet of an average person (the pole tower is convenient to overhaul by an overhaul staff).
That is, the diameter of the outer ring needs to be slightly larger than that of the inner ring of the outer ring, so that the situation that the outer ring and the inner ring are connected too tightly due to different expansion coefficients of the outer ring and the inner ring is avoided. The diameter of the outer ring needs to be close to the diameter of the inner ring of the outer ring as much as possible, so that foreign matters are prevented from being blocked in. The diameter of the dustproof ring is required to be smaller than the diameter of the inner ring of the outer ring, so that the effect of the sliding bead is avoided from being influenced by the overlarge dustproof ring.
When in actual use, the bolts connected between the base and the inner ring use high-strength bolts, so that the base is prevented from falling off.
Gaskets are required to be added during the bolt connection, so that the equipment is prevented from being damaged by thermal expansion and cold contraction. After the spring washer is added when the bolt is installed, the effect of thermal expansion and cold contraction has little influence on equipment, but the installation is also preferably selected when the temperature is higher.
Claims (6)
1. A detachable snake-proof device is characterized in that: the inner ring and the outer ring are two semi-cylindrical structural members, the base is semi-annular, and the inner ring is fixed on the base; the outer ring is sleeved outside the inner ring; the diameter of the outer circle of the base is larger than that of the bottom of the outer ring, so that the bottom of the outer ring is propped against the upper end of the base, and the outer ring is supported by the base; the outer ring is not fixed with the base and the inner ring;
the inner ring consists of two semi-cylindrical inner ring sheets, and two vertical inner and outer ring connecting grooves are formed in the outer side annular wall of each inner ring sheet; protruding inner ring piece connecting devices are arranged on two sides of the inner ring piece and are used for connecting the two inner ring pieces; the inner ring piece connecting device is provided with connecting holes, and the two inner ring pieces are fixed with the corresponding connecting holes by adopting buckles, binding belts or screws, so that the connection between the inner ring pieces is realized;
the outer ring consists of two semi-cylindrical outer ring pieces; the two sides of the outer ring piece are respectively provided with an outer ring piece connecting device, the outer ring piece connecting devices are outer ring piece connectors and outer ring piece connecting grooves which are arranged at two sides of the outer ring piece at intervals, the outer ring piece connectors protrude out of the two sides of the outer ring piece, and the outer ring piece connecting grooves are concavely arranged at the two sides of the outer ring piece; the outer ring piece connecting devices of the two outer ring pieces form a male and female matching mode;
the outer ring of the base is provided with a base connecting hole, meanwhile, the lower circumference of the inner ring is provided with an inner ring connecting hole corresponding to the lower circumference of the inner ring, threads are arranged in the base connecting hole and the inner ring connecting hole, and the inner ring connecting hole and the base connecting hole are connected by adopting bolts;
sliding balls or rollers are filled in the inner ring and outer ring connecting grooves;
the upper part of the inner ring is connected with a dust-proof ring, and the dust-proof ring is connected with the inner ring through dust-proof ring connecting holes arranged on the upper parts of the dust-proof ring and the inner ring.
2. The detachable snake protection device of claim 1, wherein: and a strong film is stuck to the outer edge of the outer ring piece connector.
3. The detachable snake protection device of claim 1, wherein: the base is formed by connecting two semicircular base plates, and the two base plates are connected in an adhesive or bolt mode.
4. A detachable snake protection device according to claim 3, wherein: the base is provided with a drainage groove.
5. The detachable snake preventing device according to claim 4, wherein: the bottom edge of the base adopts an umbrella type edge.
6. Use of a detachable snake protection device according to claim 1, characterised in that: when the anti-snake device is used, the anti-snake device can be independently arranged on a tower pole or stacked on the tower pole for use, and the anti-snake device is used for increasing the anti-snake length.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202210861150.6A CN115281179B (en) | 2022-07-22 | 2022-07-22 | Detachable snake device of preventing |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202210861150.6A CN115281179B (en) | 2022-07-22 | 2022-07-22 | Detachable snake device of preventing |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| CN115281179A CN115281179A (en) | 2022-11-04 |
| CN115281179B true CN115281179B (en) | 2023-09-19 |
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ID=83824411
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN202210861150.6A Active CN115281179B (en) | 2022-07-22 | 2022-07-22 | Detachable snake device of preventing |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN115281179B (en) |
Citations (9)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPH05231044A (en) * | 1992-02-17 | 1993-09-07 | Meishin Denki Kk | Structure for preventing vine, snake, small animal or the like from climbing electric pole |
| CN202664101U (en) * | 2012-06-12 | 2013-01-16 | 河南省电力公司焦作供电公司 | Snake-proof device for electrical powerline |
| CN203424213U (en) * | 2013-09-17 | 2014-02-12 | 国家电网公司 | Snake prevention device on electric power tower |
| CN205283040U (en) * | 2016-01-01 | 2016-06-01 | 三峡大学 | Snake device is prevented to overhead transmission line shaft tower |
| CN106025975A (en) * | 2016-07-14 | 2016-10-12 | 国家电网公司 | Anti-snake climbing device for tower or pillar |
| CN108244092A (en) * | 2018-02-14 | 2018-07-06 | 国网湖北省电力公司宜昌供电公司 | A kind of anti-snake device of pole guy |
| CN208370788U (en) * | 2018-06-22 | 2019-01-15 | 辽宁海澳科技有限公司 | A kind of anti-snake ball of rotation |
| CN212971419U (en) * | 2020-06-10 | 2021-04-16 | 张永元 | Wire pole protector |
| CN213756429U (en) * | 2020-11-09 | 2021-07-23 | 湖南省创卫生物防治有限责任公司 | Snake device is prevented to overhead transmission line shaft tower |
-
2022
- 2022-07-22 CN CN202210861150.6A patent/CN115281179B/en active Active
Patent Citations (9)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPH05231044A (en) * | 1992-02-17 | 1993-09-07 | Meishin Denki Kk | Structure for preventing vine, snake, small animal or the like from climbing electric pole |
| CN202664101U (en) * | 2012-06-12 | 2013-01-16 | 河南省电力公司焦作供电公司 | Snake-proof device for electrical powerline |
| CN203424213U (en) * | 2013-09-17 | 2014-02-12 | 国家电网公司 | Snake prevention device on electric power tower |
| CN205283040U (en) * | 2016-01-01 | 2016-06-01 | 三峡大学 | Snake device is prevented to overhead transmission line shaft tower |
| CN106025975A (en) * | 2016-07-14 | 2016-10-12 | 国家电网公司 | Anti-snake climbing device for tower or pillar |
| CN108244092A (en) * | 2018-02-14 | 2018-07-06 | 国网湖北省电力公司宜昌供电公司 | A kind of anti-snake device of pole guy |
| CN208370788U (en) * | 2018-06-22 | 2019-01-15 | 辽宁海澳科技有限公司 | A kind of anti-snake ball of rotation |
| CN212971419U (en) * | 2020-06-10 | 2021-04-16 | 张永元 | Wire pole protector |
| CN213756429U (en) * | 2020-11-09 | 2021-07-23 | 湖南省创卫生物防治有限责任公司 | Snake device is prevented to overhead transmission line shaft tower |
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| Publication number | Publication date |
|---|---|
| CN115281179A (en) | 2022-11-04 |
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