CN109672129B - Overhead transmission line cable anticorona protection device - Google Patents
Overhead transmission line cable anticorona protection device Download PDFInfo
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- CN109672129B CN109672129B CN201811522879.0A CN201811522879A CN109672129B CN 109672129 B CN109672129 B CN 109672129B CN 201811522879 A CN201811522879 A CN 201811522879A CN 109672129 B CN109672129 B CN 109672129B
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- pipeline
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- fixedly connected
- cable
- overhead
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- 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
Abstract
The invention relates to the technical field of overhead cable accessories, and particularly discloses an overhead power transmission cable corona-proof protection device which comprises a pipeline, wherein the pipeline is of a high-molecular soft structure, the outer surface of the pipeline is bent into a corrugated structure, a groove for axially disconnecting the pipeline is axially formed in the pipeline, and flanges are uniformly formed at two side ports of the pipeline in a one-piece mode. The invention adopts a physical isolation mode, avoids the direct contact of the overhead damaged cable with the outside air, is convenient to assemble by the upper sleeve and the lower sleeve, and is convenient for the rapid assembly and use of the overhead cable. When the surface of pipeline gathers into the water droplet, the water droplet is the biggest at the charge density of tip department, and electric field strength is also very big, and piezoceramics takes place mechanical strain under the effect of electric field this moment, and mechanical strain when piezoceramics is the same with the natural frequency of elastic plate, and the elastic plate then drives the sash weight and takes place the resonance, and during the sash weight vibration, the vibration ability that can absorb the cable on the one hand prevents the broken department of cable further wearing and tearing.
Description
Technical Field
The invention relates to the technical field of overhead cable accessories, in particular to an anti-corona protection device for an overhead power transmission cable.
Background
The assembled high-voltage transmission line is inevitably collided and scratched in the construction process or a protruding metal object exists in the wire, a local corona discharge point is formed, and a large amount of electric energy loss is caused by corona discharge.
At present, the method of increasing the diameter and the number of splits of the wire or increasing the height of the tower is generally adopted for preventing corona discharge to reduce the corona loss of the high-voltage wire. Although the method can achieve the effect of reducing corona loss, the investment is large, the existing power transmission line with corona defects after assembly cannot be improved, large-scale cable replacement is more impractical, and a device is urgently needed to prevent the local corona phenomenon of overhead cables at damaged positions.
Disclosure of Invention
The invention aims to solve the problems and provides an anti-corona protection device for an overhead power transmission cable.
In order to achieve the purpose, the invention adopts the following technical scheme:
the corona-proof protection device for the overhead transmission cable comprises a pipeline and is characterized in that the pipeline is of a high-molecular soft structure, the outer surface of the pipeline is bent into a corrugated structure, a groove for axially disconnecting the pipeline is axially formed in the pipeline, baffle edges are integrally formed at the ports of two sides of the pipeline, and fixing sleeves are fixedly sleeved on the baffle edges of the two sides;
the fixing sleeve consists of an upper sleeve and a lower sleeve, first mounting grooves are formed in the positions corresponding to the two sides of the upper sleeve and the lower sleeve, and the first mounting grooves on the two sides are fixedly connected through bolts;
the bottom end of the lower sleeve is provided with a drainage hole, the drainage hole adopts a conical structure, and the diameter of the upper side of the drainage hole is larger;
a second mounting groove is formed in the bottom end of the lower sleeve in a water drainage hole in the central symmetry mode, the second mounting grooves on two sides are fixedly connected with fixing plates through bolts, one side middle portion of the lower sleeve is far away from the fixing plates and fixedly connected with piezoelectric crystals, one side of the piezoelectric crystals, far away from the fixing plates, is fixedly connected with an elastic plate, and two sides of the elastic plate are fixedly connected with hanging hammers.
Preferably, the fixing plate is provided with a plurality of micropores.
Preferably, the elastic plate adopts an arc structure, and one side of the elastic plate close to the piezoelectric crystal is an outer arc surface.
Preferably, the hanging hammers on the two sides are fixedly connected with pull ropes, the outer surfaces of the two sides of the pipeline, which are positioned in the groove, are fixedly connected with hanging rings, and one ends of the pull ropes, which are far away from the hanging hammers, are fixedly connected to the hanging rings.
Compared with the prior art, the invention has the following advantages:
the invention adopts a physical isolation mode, avoids the direct contact of the overhead damaged cable with the outside air, is convenient to assemble by the upper sleeve and the lower sleeve, and is convenient for the rapid assembly and use of the overhead cable.
When the surface of pipeline gathers into the water droplet, the water droplet can be elongated gradually under the effect of gravity and electric field power and be the pointed end, the water droplet is the biggest at the charge density of pointed end department, electric field strength is also very big, piezoceramics takes place mechanical strain under the effect of electric field this moment, when piezoceramics's mechanical strain is the same with the natural frequency of elastic plate, the elastic plate and then drives the sash weight and take place the resonance, during the sash weight vibration, the vibration ability of cable can be absorbed on the one hand, prevent the further wearing and tearing of broken department of cable.
Drawings
FIG. 1 is a schematic structural diagram of an overhead power transmission cable corona protection device according to the present invention;
FIG. 2 is a cross-sectional view taken along line A-A of FIG. 1 in accordance with the present invention;
fig. 3 is a bottom view of fig. 1 of the present invention.
In the figure: the device comprises a pipeline 1, a fixing sleeve 2, an upper sleeve 2a, a lower sleeve 2b, a pull rope 3, a hanging hammer 4, an elastic plate 5, a piezoelectric crystal 6, a fixing plate 7, a first mounting groove 8, a second mounting groove 9, a flange 10, a lifting ring 11, a slot 12 and a drain hole 13.
Detailed Description
The technical solutions in the embodiments of the present invention will be clearly and completely described below with reference to the drawings in the embodiments of the present invention, and it is obvious that the described embodiments are only a part of the embodiments of the present invention, and not all of the embodiments.
Referring to fig. 1 to 3, an overhead transmission cable corona-proof protection device comprises a pipeline 1, wherein the pipeline 1 is of a high polymer soft structure, the outer surface of the pipeline 1 is bent into a corrugated structure, a groove 12 for axially breaking the pipeline 1 is axially formed in the pipeline 1, both side ports of the pipeline 1 are respectively provided with a flange 10 in an integrated manner, and both sides of the flanges 10 are respectively fixedly sleeved with a fixing sleeve 2.
Fixed cover 2 comprises upper cover 2a and lower cover 2b two parts, and first mounting groove 8 has all been seted up to the position that upper cover 2a and lower cover 2b both sides correspond, and the first mounting groove 8 of both sides passes through bolt fixed connection.
The bottom end of the lower sleeve 2b is provided with a water drainage hole 13, the water drainage hole 13 adopts a conical structure, and the diameter of the upper side of the water drainage hole 13 is larger.
A second mounting groove 9 has been seted up for central symmetry in the bottom hydrophobic hole 13 of lower cover 2b, and the common fixedly connected with fixed plate 7 of bolt is passed through to the second mounting groove 9 of both sides, and fixed plate 7 keeps away from one side middle part fixedly connected with piezoelectric crystal 6 of lower cover 2b, and piezoelectric crystal 6 keeps away from one side fixedly connected with elastic plate 5 of fixed plate 7, the equal fixedly connected with sash weight 4 in both sides of elastic plate 5.
In this embodiment, the elastic plate 5 has an arc structure, and one side of the elastic plate 5 close to the piezoelectric crystal 6 is an outer arc surface, and the elastic plate 5 with the arc structure can swing up and down under the resonance with the piezoelectric crystal 6.
The pipeline 1 is sleeved on an overhead cable which is easy to generate corona discharge or has a broken surface through the open groove 12, then the upper sleeve 2a and the lower sleeve 2b are sleeved on the flange 10 and tightly press the cable, then the upper sleeve 2a and the lower sleeve 2 are fixed through bolts, and at the moment, the pipeline 1 can be assembled on the outer side, so that the cable is well protected.
When the surface of pipeline 1 gathers into the water droplet, the water droplet can be elongated gradually under gravity and electric field effect and be the pointed end, the water droplet is the biggest at the charge density of pointed end department, electric field intensity is also very big, piezoceramics 6 takes place mechanical strain under the effect of electric field this moment, mechanical strain when piezoceramics 6 is the same with elastic plate 5's natural frequency, elastic plate 5 further drives davit 4 and takes place the resonance, when davit 4 vibrates, the vibration ability of cable can be absorbed on the one hand, prevent the further wearing and tearing of broken department of cable.
Example two
In this embodiment, a plurality of micro holes are further formed in the fixing plate 7, and the micro holes can be formed by a lattice laser, and in this embodiment, the piezoelectric crystal 6 can be a thickness deformation type piezoelectric crystal, such as a quartz crystal, which has good thickness deformation.
When the piezoelectric crystal 6 generates mechanical deformation under the action of an external electric field, when the mechanical strain of the piezoelectric crystal 6 is the same as the natural frequency of the fixing plate 7, the fixing plate 7 resonates with the piezoelectric crystal 6, and at the moment, accumulated water on the fixing plate 7 can be sprayed out from the micropores on the fixing plate 7, so that the accumulated water on the fixing plate 7 is prevented.
EXAMPLE III
Because the damaged department electric field intensity of cable is great, and pipeline 1 inevitable and cable contact, the sharp department of the water droplet on pipeline 1 surface also very easily produces corona discharge, and this embodiment further increases the raindrop cleaning capability of pipeline surface on the basis of embodiment one and reduces corona discharge phenomenon, specifically as follows: the hanging hammers 4 on the two sides are fixedly connected with pull ropes 3, the pipeline 1 is positioned on the outer surfaces of the two sides of the slot 12 and is fixedly connected with hanging rings 11, and one ends of the pull ropes 3, far away from the hanging hammers 4, are fixedly connected onto the hanging rings 11.
When the hanging hammer 4 vibrates, the hanging hammer 4 can pull the pull rope 3 fixedly connected with the hanging hammer 4 to reciprocate, and the pull rope 3 further drives the pipeline 1 at the other end to swing, so that liquid retained on the pull rope can be collected along the outer surface of the pipeline 1 and further thrown out.
In the present invention, unless otherwise specifically stated or limited, the terms "sliding", "rotating", "fixed", "provided", and the like are to be understood broadly, and may be, for example, welded, bolted, or integrated; can be mechanically or electrically connected; they may be directly connected or indirectly connected through intervening media, or they may be connected internally or in any other suitable relationship, unless expressly stated otherwise.
The above description is only for the preferred embodiment of the present invention, but the scope of the present invention is not limited thereto, and any person skilled in the art should be considered to be within the technical scope of the present invention, and the technical solutions and the inventive concepts thereof according to the present invention should be equivalent or changed within the scope of the present invention.
Claims (4)
1. The utility model provides an overhead transmission line cable anticorona protection device, includes pipeline (1), its characterized in that, pipeline (1) adopts the polymer soft construction, pipeline (1) surface is buckled into ripple structure, axial on pipeline (1) is seted up with the fluting (12) of pipeline (1) axial disconnection, the both sides port department of pipeline (1) all integrated into one piece have flange (10), all fixed the cover is equipped with fixed cover (2) on the flange (10) of both sides;
the fixing sleeve (2) is composed of an upper sleeve (2a) and a lower sleeve (2b), first mounting grooves (8) are formed in the positions, corresponding to the two sides of the upper sleeve (2a) and the lower sleeve (2b), of the two sides, and the first mounting grooves (8) on the two sides are fixedly connected through bolts;
the bottom end of the lower sleeve (2b) is provided with a hydrophobic hole (13), the hydrophobic hole (13) adopts a conical structure, and the diameter of the upper side of the hydrophobic hole (13) is larger;
the bottom of lower cover (2b) is hydrophobic hole (13) and has been seted up second mounting groove (9) for central symmetry, both sides second mounting groove (9) are through the common fixedly connected with fixed plate (7) of bolt, one side middle part fixedly connected with piezoelectric crystal (6) of lower cover (2b) are kept away from in fixed plate (7), one side fixedly connected with elastic plate (5) of fixed plate (7) are kept away from in piezoelectric crystal (6), the equal fixedly connected with sash weight (4) in both sides of elastic plate (5).
2. The corona protection device for overhead power transmission cable according to claim 1, wherein the fixing plate (7) has a plurality of micro holes.
3. The corona protection device for overhead power transmission cable according to claim 1, wherein the elastic plate (5) is of an arc structure, and one side of the elastic plate (5) close to the piezoelectric crystal (6) is an outer arc surface.
4. The corona protection device for overhead transmission cables as claimed in claim 1, wherein the hanging hammers (4) on both sides are fixedly connected with a pull rope (3), the outer surfaces of the pipeline (1) on both sides of the slot (12) are fixedly connected with hanging rings (11), and one ends of the pull ropes (3) far away from the hanging hammers (4) are fixedly connected with the hanging rings (11).
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201811522879.0A CN109672129B (en) | 2018-12-13 | 2018-12-13 | Overhead transmission line cable anticorona protection device |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201811522879.0A CN109672129B (en) | 2018-12-13 | 2018-12-13 | Overhead transmission line cable anticorona protection device |
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| Publication Number | Publication Date |
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| CN109672129A CN109672129A (en) | 2019-04-23 |
| CN109672129B true CN109672129B (en) | 2020-08-07 |
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| CN201811522879.0A Active CN109672129B (en) | 2018-12-13 | 2018-12-13 | Overhead transmission line cable anticorona protection device |
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| Publication number | Priority date | Publication date | Assignee | Title |
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| CN112048995B (en) * | 2020-10-11 | 2022-07-26 | 张海伟 | Road bridge pier safety device |
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| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JP2002118916A (en) * | 2000-10-06 | 2002-04-19 | Hitachi Cable Ltd | Fixing method for snow drop prevention net |
| CN1820399A (en) * | 2004-03-03 | 2006-08-16 | 矢崎总业株式会社 | Corrugated tube, boring apparatus for corrugated tube, and boring method for corrugated tube |
| US7304242B1 (en) * | 2006-06-07 | 2007-12-04 | 3M Innovative Properties Company | Shrinkable closure |
| CN204302333U (en) * | 2014-11-20 | 2015-04-29 | 中国南方电网有限责任公司超高压输电公司检修试验中心 | The telescoping tube that a kind of high pressure is anticorona |
| JP6392108B2 (en) * | 2014-12-19 | 2018-09-19 | 未来工業株式会社 | Pipe material holder, pipe material holding structure, and pipe material piping method |
| CN205489396U (en) * | 2016-02-22 | 2016-08-17 | 国网山东省电力公司莒南县供电公司 | Ice -melt device for cable ice removing |
| CN206947921U (en) * | 2017-07-19 | 2018-01-30 | 国网福建南安市供电有限公司 | A kind of cable terminal protection tube |
| CN107611868A (en) * | 2017-09-27 | 2018-01-19 | 国网山西省电力公司检修分公司 | Fast demountable type cable protective sleeve |
| CN207664545U (en) * | 2017-11-23 | 2018-07-27 | 杭州浩飞管业有限公司 | A kind of novel MPP power cable protecting pipes road |
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Effective date of registration: 20200629 Address after: 250000 Room B412/B416, 4th Floor, Building 3, Qilu Software Park, 1000 Shunhua Road, Jinan City, Shandong Province Applicant after: Shandong Hedi Intelligent Technology Co.,Ltd. Address before: Longpan road Xuanwu District of Nanjing city of Jiangsu Province, No. 159 210000 Applicant before: Xia Wenfeng |
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