CN111627620B - Upper-carrying type suspension V-shaped insulator string - Google Patents
Upper-carrying type suspension V-shaped insulator string Download PDFInfo
- Publication number
- CN111627620B CN111627620B CN202010601418.3A CN202010601418A CN111627620B CN 111627620 B CN111627620 B CN 111627620B CN 202010601418 A CN202010601418 A CN 202010601418A CN 111627620 B CN111627620 B CN 111627620B
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- CN
- China
- Prior art keywords
- insulator string
- shaped
- string
- equalizing ring
- type suspension
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Links
- 239000012212 insulator Substances 0.000 title claims abstract description 114
- 239000000725 suspension Substances 0.000 title claims abstract description 41
- XEEYBQQBJWHFJM-UHFFFAOYSA-N Iron Chemical compound [Fe] XEEYBQQBJWHFJM-UHFFFAOYSA-N 0.000 claims abstract description 51
- 229910052742 iron Inorganic materials 0.000 claims abstract description 26
- 239000002131 composite material Substances 0.000 claims description 49
- 238000005452 bending Methods 0.000 claims description 3
- 230000005484 gravity Effects 0.000 claims description 3
- 230000005540 biological transmission Effects 0.000 abstract description 14
- 238000010276 construction Methods 0.000 abstract description 6
- 238000004904 shortening Methods 0.000 abstract description 2
- 238000000034 method Methods 0.000 description 4
- 238000004519 manufacturing process Methods 0.000 description 3
- 230000001154 acute effect Effects 0.000 description 2
- 230000009286 beneficial effect Effects 0.000 description 1
- 238000013461 design Methods 0.000 description 1
- 238000011161 development Methods 0.000 description 1
- 238000009826 distribution Methods 0.000 description 1
- 238000012423 maintenance Methods 0.000 description 1
- 238000012986 modification Methods 0.000 description 1
- 230000004048 modification Effects 0.000 description 1
Classifications
-
- H—ELECTRICITY
- H01—ELECTRIC ELEMENTS
- H01B—CABLES; CONDUCTORS; INSULATORS; SELECTION OF MATERIALS FOR THEIR CONDUCTIVE, INSULATING OR DIELECTRIC PROPERTIES
- H01B17/00—Insulators or insulating bodies characterised by their form
- H01B17/02—Suspension insulators; Strain insulators
- H01B17/04—Chains; Multiple chains
-
- H—ELECTRICITY
- H01—ELECTRIC ELEMENTS
- H01B—CABLES; CONDUCTORS; INSULATORS; SELECTION OF MATERIALS FOR THEIR CONDUCTIVE, INSULATING OR DIELECTRIC PROPERTIES
- H01B17/00—Insulators or insulating bodies characterised by their form
- H01B17/02—Suspension insulators; Strain insulators
- H01B17/06—Fastening of insulator to support, to conductor, or to adjoining insulator
-
- H—ELECTRICITY
- H01—ELECTRIC ELEMENTS
- H01B—CABLES; CONDUCTORS; INSULATORS; SELECTION OF MATERIALS FOR THEIR CONDUCTIVE, INSULATING OR DIELECTRIC PROPERTIES
- H01B17/00—Insulators or insulating bodies characterised by their form
- H01B17/02—Suspension insulators; Strain insulators
- H01B17/06—Fastening of insulator to support, to conductor, or to adjoining insulator
- H01B17/08—Fastening of insulator to support, to conductor, or to adjoining insulator by cap-and-bolt
-
- H—ELECTRICITY
- H01—ELECTRIC ELEMENTS
- H01B—CABLES; CONDUCTORS; INSULATORS; SELECTION OF MATERIALS FOR THEIR CONDUCTIVE, INSULATING OR DIELECTRIC PROPERTIES
- H01B17/00—Insulators or insulating bodies characterised by their form
- H01B17/38—Fittings, e.g. caps; Fastenings therefor
-
- H—ELECTRICITY
- H01—ELECTRIC ELEMENTS
- H01B—CABLES; CONDUCTORS; INSULATORS; SELECTION OF MATERIALS FOR THEIR CONDUCTIVE, INSULATING OR DIELECTRIC PROPERTIES
- H01B17/00—Insulators or insulating bodies characterised by their form
- H01B17/42—Means for obtaining improved distribution of voltage; Protection against arc discharges
-
- 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
- Engineering & Computer Science (AREA)
- Power Engineering (AREA)
- Insulators (AREA)
Abstract
The application provides an upper-carrying type suspension V-shaped insulator string, which comprises two groups of insulator string connecting structures and upper-carrying type suspension connecting plates, wherein one ends of the two groups of insulator string connecting structures are respectively connected to two sides of the upper-carrying type suspension connecting plates, and the other ends of the two groups of insulator string connecting structures are connected to iron tower cross arms to form the V-shaped insulator string. Compared with the conventional suspension V-shaped string, the application increases the upper lever type suspension yoke plate, so that the electric gap circle below the V-shaped string is improved and shortened upwards, and the L-shaped large equalizing ring improves the electric gap circle at the side surface of the tower window, thereby shortening the size of the tower window of the iron tower and reducing the weight of the iron tower. Meanwhile, the connecting plate is lifted and flattened relatively, so that the moment of the wire to the insulator hardware string during windage is reduced, and the stress of the insulator hardware string is improved. Therefore, the application is suitable for the transmission line towers in mountain areas and strong wind areas, prevents the windage yaw flashover and the string drop of the overhead transmission line, avoids the large-area power failure accidents, and improves the construction economy and the power supply reliability of the power grid.
Description
Technical Field
The invention relates to the field of electric power design, in particular to an overhead transmission line iron tower suspension V-string insulator string, in particular to a structure which is suitable for various areas, especially mountain areas and strong wind areas, effectively reduces the size of a phase tower window in an iron tower and improves the stress of a hardware string.
Background
With the deep development of power grid construction, overhead power transmission lines increasingly pass through areas with severe conditions, such as mountain areas and strong wind areas, so that the power transmission line manufacturing cost is higher and higher. And the insulator string is not only influenced by uneven stress such as large altitude difference and large and small gear of mountain, but also influenced by strong wind, the insulator string swings greatly, and the probability of windage yaw flashover and string falling is greatly improved. Once such a situation occurs, a large-area power failure accident is caused, so that great harm is brought to the life and production of people, and great economic loss is brought to the country. And after the accident, the place of the fault is difficult to accurately and rapidly judge, and great trouble is brought to the operation and maintenance work of the high-voltage transmission line.
Therefore, a novel suspension insulator string type is needed to effectively reduce the window layer height of a middle phase tower of the iron tower, reduce the weight of the iron tower and improve the construction economy of a power grid; the yoke plate is lifted and flattened relatively, so that the moment of the wire to the insulator hardware string during windage yaw is reduced, the stress of the insulator hardware string is improved, the yoke plate is suitable for power transmission line towers in mountain areas and high-wind areas, windage yaw flashover and string dropping of overhead power transmission lines are prevented, large-area power failure accidents are avoided, and the power supply reliability of a power grid is improved.
Disclosure of Invention
Aiming at the problems, the invention provides an upper-lever type suspension V-shaped insulator string, which can effectively reduce the window layer height size of a phase tower in an iron tower, lighten the weight of the iron tower and improve the construction economy of a power grid; the yoke plate is lifted, the yoke plate is relatively flattened, the moment of the wire to the insulator hardware string during windage yaw is reduced, and the stress of the insulator hardware string is improved, so that the yoke plate is applicable to power transmission line towers in mountain areas and high-wind areas, windage yaw flashover and string dropping of overhead transmission lines are prevented, large-area power failure accidents are avoided, and the power supply reliability of a power grid is improved.
The technical scheme adopted by the invention is as follows: the upper-carrying type suspension V-shaped insulator string comprises two groups of insulator string connecting structures and upper-carrying type suspension connecting plates, wherein one ends of the two groups of insulator string connecting structures are respectively connected to two sides of the upper-carrying type suspension connecting plates, and the other ends of the two groups of insulator string connecting structures are connected to iron tower cross arms to form the V-shaped insulator string.
Further, the insulator string connecting structure comprises an L-shaped large equalizing ring, a composite insulator string and a small equalizing ring, wherein the L-shaped large equalizing ring and the small equalizing ring are respectively arranged at two ends of the composite insulator string; one end of the composite insulator string, which is provided with a small equalizing ring, is connected with the cross arm of the iron tower, and the other end of the composite insulator string is connected with the upper-lever suspension yoke plate.
Furthermore, the connecting points of the upper-lever type suspension connecting plate and the insulator string connecting structure are positioned on two sides of the middle part of the suspension connecting plate, the upper lever of the suspension connecting plate head is arranged above the horizontal connecting line of the left and right connecting points to form an upper lever type structure, and the intersection point of the central line extension lines of the insulator string connecting structures on the left and right sides is arranged above the gravity center of the upper lever type suspension connecting plate.
Further, the large equalizing ring of L type includes L type equalizing ring and linking bridge, and L type equalizing ring is connected with linking bridge, and the large equalizing ring of L type passes through linking bridge and is connected with the composite insulator cluster.
Furthermore, the bending angle of the L-shaped large equalizing ring can be adjusted according to actual engineering conditions.
Further, the composite insulator string is a composite insulator string or a disc insulator string.
Further, the composite insulator string consists of a composite insulator and a plurality of hardware fittings.
Further, the disc insulator string is composed of a plurality of disc insulators and a plurality of hardware fittings.
Further, the V-shaped insulator chain further comprises a DB adjusting plate and a PT adjusting plate which are arranged between the iron tower cross arm and the insulator chain connecting structure, and the iron tower cross arm, the DB adjusting plate, the PT adjusting plate and the insulator chain connecting structure are sequentially connected.
Compared with the prior art, the beneficial effects of adopting the technical scheme are as follows: compared with the conventional suspension V-shaped string, the invention increases the upper lever type suspension yoke plate, so that the electric gap circle below the V-shaped string is improved and shortened upwards, and the L-shaped large equalizing ring improves the electric gap circle at the side surface of the tower window, thereby shortening the size of the tower window of the iron tower and reducing the weight of the iron tower. Meanwhile, the connecting plate is lifted and flattened relatively, so that the moment of the wire to the insulator hardware string during windage is reduced, and the stress of the insulator hardware string is improved. Therefore, the invention is suitable for the transmission line towers in mountain areas and strong wind areas, prevents the windage yaw flashover and the string drop of the overhead transmission line, avoids the large-area power failure accidents, and improves the construction economy and the power supply reliability of the power grid.
Drawings
FIG. 1 is an elevation view of an upper beam type hanging V-shaped insulator string of the present invention;
FIG. 2 is a side view of an upper beam type hanging V-shaped insulator string according to the present invention;
Reference numerals: the high-voltage transformer comprises a 1-upper-lever type suspension yoke plate, a 2-L-shaped large equalizing ring, a 3-composite insulator string, a 4-small equalizing ring, a 5-iron tower cross arm, a 6-DB adjusting plate and a 7-PT adjusting plate.
Detailed Description
The invention is further described below with reference to the accompanying drawings.
Example 1
As shown in fig. 1 and 2, the upper-carrying type suspension V-shaped insulator string comprises two groups of insulator string connecting structures and upper-carrying type suspension connecting plates, wherein one ends of the two groups of insulator string connecting structures are respectively connected to two sides of the upper-carrying type suspension connecting plates, and the other ends of the two groups of insulator string connecting structures are connected to iron tower cross arms to form the V-shaped insulator string. The insulator string connecting structure comprises an L-shaped large equalizing ring 2, a composite insulator string 3 and a small equalizing ring 4.
Specifically, in the embodiment, the upper-lever-type suspension V-shaped insulator string sequentially comprises an upper-lever-type suspension yoke plate 1, an L-type large equalizing ring 2, a composite insulator string 3, a small equalizing ring 4 and an iron tower cross arm 5 from bottom to top.
The upper-lever suspension yoke plate 1 is connected with the composite insulator string 3, the L-shaped large equalizing ring 2 is connected to the lower part of the composite insulator string 3, the small equalizing ring 4 is connected to the upper part of the composite insulator string 3, and the composite insulator string 3 is connected with the iron tower cross arm 5.
In this embodiment, the connection points of the upper-lever-type suspension connection plate 1 and the composite insulator string 3 are on two sides of the middle part of the upper-lever-type suspension connection plate 1, the connection plate head is on the upper part of the horizontal connection line of the connection point, and the intersection point of the central line extension lines of the left and right side composite insulator strings 3 is above the gravity center of the upper-lever-type suspension connection plate 1. The upper-lever suspension yoke plate 1 is conventionally connected with the composite insulator string 3, and detailed description is omitted here, and in addition, the composite insulator string is composed of a composite insulator and a plurality of hardware fittings, so that the length of the composite insulator string can be set according to practical conditions such as an air gap, and the half included angle of the V string is a common acute angle beta, and can be determined according to a tower pole planning result and a swing angle.
Example 2
On the basis of the embodiment 1, the L-shaped large equalizing ring 2 is connected to the lower side part of the composite insulator string 3, the small equalizing ring 4 is connected to the upper part of the composite insulator string 3, and two ends of the composite insulator string 3 are respectively connected with the iron tower cross arm 5 and the suspension yoke plate 1. . In this embodiment, the connection between the L-shaped large equalizing ring 2 and the small equalizing ring 4 and the composite insulator string 3 is a bolt connection, which is used to increase the capacitance of the composite insulator string 3 to the wires and improve the voltage distribution. An acute angle alpha is formed between the lower part of the L-shaped large equalizing ring 2 and the vertical direction of the composite insulator string 3, and compared with a conventional V-shaped string, the application improves the electric clearance circle on the side surface of the tower window after the L-shaped large equalizing ring is bent downwards by the angle alpha.
Preferably, the large L-shaped equalizing ring comprises an L-shaped equalizing ring and a connecting support, the connecting support is connected with the composite insulator string, the large L-shaped equalizing ring is arranged at the lower part of the composite insulator string, and the bending angle alpha of the large L-shaped equalizing ring is determined according to the actual conditions of engineering.
Example 3
On the basis of embodiment 2, the composite insulator string 3 is connected with the iron tower cross arm 5 through hardware fittings such as DB adjusting plates 6 and PT adjusting plates 7, and the length of the hardware fitting string and the included angle with the V string can be conveniently adjusted according to actual conditions so as to adapt to electric gaps of tower windows with different tower-type different working conditions.
Therefore, the application is suitable for the linear iron towers of the power transmission lines in mountain areas and strong wind areas, prevents the windage yaw flashover and the string drop of the overhead power transmission lines, avoids large-area power failure accidents, and improves the construction economy and the power supply reliability of the power grid.
Example 4
On the basis of embodiment 3, the composite insulator string 3 may be any one of a composite insulator string and a disc insulator string.
Preferably, the composite insulator is selected, because the composite insulator string has excellent pollution flashover resistance, and compared with a disc insulator string, the composite insulator string has low manufacturing cost and does not influence the use.
Example 5
On the basis of embodiment 4, the composite insulator string 3 is composed of a composite insulator and a plurality of hardware fittings, and the hardware fitting group may also be composed of a plurality of disc insulators and a plurality of hardware fittings. In this embodiment, the structures of the composite insulator and the hardware and the connection manner of the composite insulator and the hardware are well known to those skilled in the art, and will not be described in detail herein; in addition, the disc insulator is also a common insulator type in the art, and thus, detailed description thereof will not be repeated.
The invention is not limited to the specific embodiments described above. The invention extends to any novel one, or any novel combination, of the features disclosed in this specification, as well as to any novel one, or any novel combination, of the steps of the method or process disclosed. It is intended that insubstantial changes or modifications from the invention as described herein be covered by the claims below, as viewed by a person skilled in the art, without departing from the true spirit of the invention.
All of the features disclosed in this specification, or all of the steps in a method or process disclosed, may be combined in any combination, except for mutually exclusive features and/or steps.
Any feature disclosed in this specification may be replaced by alternative features serving the same or equivalent purpose, unless expressly stated otherwise. That is, each feature is one example only of a generic series of equivalent or similar features, unless expressly stated otherwise.
Claims (4)
1. The upper-carrying type suspension V-shaped insulator string is characterized by comprising two groups of insulator string connecting structures and upper-carrying type suspension connecting plates, wherein one ends of the two groups of insulator string connecting structures are respectively connected to two sides of the upper-carrying type suspension connecting plates, and the other ends of the two groups of insulator string connecting structures are connected to iron tower cross arms to form the V-shaped insulator string;
the insulator string connecting structure comprises an L-shaped large equalizing ring, a composite insulator string and a small equalizing ring, wherein the L-shaped large equalizing ring and the small equalizing ring are respectively arranged at two ends of the composite insulator string; one end of the composite insulator string provided with a small equalizing ring is connected with the cross arm of the iron tower, and the other end of the composite insulator string is connected with the upper-lever type suspension yoke plate;
The connecting points of the upper-lever type suspension connecting plate and the insulator string connecting structure are positioned on two sides of the middle part of the suspension connecting plate, the head of the suspension connecting plate is lever-type above the horizontal connecting line of the left and right connecting points to form an upper lever type structure, and the intersection point of the central line extension lines of the insulator string connecting structures on the left and right sides is above the gravity center of the upper lever type suspension connecting plate;
The L-shaped large equalizing ring comprises an L-shaped equalizing ring and a connecting bracket, the L-shaped equalizing ring is connected with the connecting bracket, and the L-shaped large equalizing ring is connected with the composite insulator string through the connecting bracket;
the bending angle of the L-shaped large equalizing ring is adjusted according to actual engineering conditions;
The V-shaped insulator chain further comprises a DB adjusting plate and a PT adjusting plate which are arranged between the iron tower cross arm and the insulator chain connecting structure, and the iron tower cross arm, the DB adjusting plate, the PT adjusting plate and the insulator chain connecting structure are sequentially connected.
2. The upper beam type hanging V-shaped insulator string according to claim 1, wherein the composite insulator string is a composite insulator string or a disc insulator string.
3. The upper beam type suspension V-shaped insulator string according to claim 2, wherein the composite insulator string is composed of a composite insulator and a plurality of hardware fittings.
4. The upper beam type hanging V-shaped insulator string according to claim 2, wherein the disc insulator string is composed of a plurality of disc insulators and a plurality of hardware fittings.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202010601418.3A CN111627620B (en) | 2020-06-29 | 2020-06-29 | Upper-carrying type suspension V-shaped insulator string |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202010601418.3A CN111627620B (en) | 2020-06-29 | 2020-06-29 | Upper-carrying type suspension V-shaped insulator string |
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| Publication Number | Publication Date |
|---|---|
| CN111627620A CN111627620A (en) | 2020-09-04 |
| CN111627620B true CN111627620B (en) | 2024-05-24 |
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| CN202010601418.3A Active CN111627620B (en) | 2020-06-29 | 2020-06-29 | Upper-carrying type suspension V-shaped insulator string |
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Families Citing this family (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN112489896B (en) * | 2020-11-23 | 2022-09-30 | 广东电网有限责任公司 | Wire windage yaw restraines insulator chain |
| CN113374330A (en) * | 2021-06-25 | 2021-09-10 | 中国电力工程顾问集团华北电力设计院有限公司 | Transmission line cat head tower suitable for it exceeds limit tower position to sway angle |
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