CN111627620A - Top-carrying type suspension V-shaped insulator string - Google Patents
Top-carrying type suspension V-shaped insulator string Download PDFInfo
- Publication number
- CN111627620A CN111627620A CN202010601418.3A CN202010601418A CN111627620A CN 111627620 A CN111627620 A CN 111627620A CN 202010601418 A CN202010601418 A CN 202010601418A CN 111627620 A CN111627620 A CN 111627620A
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- Prior art keywords
- insulator string
- shaped
- type suspension
- loading type
- string
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Links
- 239000012212 insulator Substances 0.000 title claims abstract description 119
- 239000000725 suspension Substances 0.000 title claims abstract description 52
- XEEYBQQBJWHFJM-UHFFFAOYSA-N Iron Chemical compound [Fe] XEEYBQQBJWHFJM-UHFFFAOYSA-N 0.000 claims abstract description 61
- 229910052742 iron Inorganic materials 0.000 claims abstract description 31
- 239000002131 composite material Substances 0.000 claims description 48
- 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
- 238000000034 method Methods 0.000 description 4
- 238000004519 manufacturing process Methods 0.000 description 3
- 230000001154 acute effect Effects 0.000 description 2
- PCHJSUWPFVWCPO-UHFFFAOYSA-N gold Chemical compound [Au] PCHJSUWPFVWCPO-UHFFFAOYSA-N 0.000 description 2
- 239000010931 gold Substances 0.000 description 2
- 229910052737 gold Inorganic materials 0.000 description 2
- 238000004904 shortening Methods 0.000 description 2
- 230000009286 beneficial effect Effects 0.000 description 1
- 150000001875 compounds Chemical class 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
Images
Classifications
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- 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
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- Engineering & Computer Science (AREA)
- Power Engineering (AREA)
- Insulators (AREA)
Abstract
The invention provides a top-loading type suspension V-shaped insulator string, which comprises two groups of insulator string connecting structures and a top-loading type suspension connecting plate, wherein one ends of the two groups of insulator string connecting structures are respectively connected to two sides of the top-loading type suspension connecting plate, and the other ends of the two groups of insulator string connecting structures are connected to a cross arm of an iron tower to form the V-shaped insulator string. Compared with a conventional suspension V-shaped string, the suspension connecting plate has the advantages that after the suspension connecting plate is additionally arranged, the electric clearance circle below the V-shaped string is improved and shortened upwards, and the electric clearance circle on the side surface of a tower window is improved by the L-shaped large equalizing ring, so that the size of the tower window of a iron tower can be shortened, and the weight of the iron tower is reduced. Meanwhile, the yoke plate is lifted to be relatively flat, so that the moment of the wire on the insulator hardware string in windage yaw is reduced, and the stress of the insulator hardware string is improved. Therefore, the invention is suitable for the transmission line iron towers in mountain areas and strong wind areas, prevents the overhead transmission line from windage flashover and string dropping, avoids 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 power design, in particular to a suspension V-string insulator string of an overhead transmission line iron tower, and particularly relates to a structure which is suitable for various regions, particularly mountainous regions and strong wind regions, effectively reduces the size of a phase tower window in the iron tower and improves the stress of a hardware string.
Background
With the deep development of power grid construction, overhead power transmission lines pass through more and more areas with severe conditions, such as mountain areas and strong wind areas, so that the manufacturing cost of the power transmission lines is higher and higher. And the insulator string is not only influenced by uneven stress such as large height difference and large and small gear in mountainous regions, but also influenced by strong wind, the insulator string swings greatly, and the probability of wind deflection flashover and string falling is greatly improved. Once such a situation occurs, a large-area power failure accident will be caused, which brings great harm to life and production of people and great economic loss to the country. And after an accident occurs, the occurrence place of the fault is difficult to accurately and quickly judge, and the operation and maintenance work of the high-voltage transmission line is greatly disturbed.
Therefore, a novel suspension insulator string type is needed to effectively reduce the height of the window layer of the phase tower in the iron tower and reduce the weight of the iron tower so as to improve the economical efficiency of power grid construction; the connecting plate is lifted and flattened relatively, the moment of the wire on the insulator hardware string in windage yaw is reduced, the stress of the insulator hardware string is improved, the connecting plate can be suitable for power transmission line iron towers in mountainous regions and strong wind regions, the overhead power transmission line is prevented from windage yaw flashover and string falling, 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 a top-loading type suspension V-shaped insulator string which can effectively reduce the height of a phase tower window layer in an iron tower, reduce the weight of the iron tower and improve the economical efficiency of power grid construction; the connecting plate is lifted and flattened relatively, the moment of the wire on the insulator hardware string in windage yaw is reduced, and the stress of the insulator hardware string is improved, so that the connecting plate can be applied to power transmission line iron towers in mountain areas and strong wind areas, the overhead power transmission line is prevented from windage yaw flashover and string falling, the power failure accident in a large area is avoided, and the power supply reliability of a power grid is improved.
The technical scheme adopted by the invention is as follows: a top-loading type suspension V-shaped insulator string comprises two groups of insulator string connecting structures and a top-loading type suspension connecting plate, wherein one ends of the two groups of insulator string connecting structures are respectively connected to two sides of the top-loading type suspension connecting plate, and the other ends of the two groups of insulator string connecting structures are connected to a cross arm of an iron tower to form the V-shaped insulator string.
Furthermore, 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-bearing type suspension yoke plate.
Furthermore, the junction points of the upper suspension yoke plate and the insulator string connecting structure are positioned at two sides of the middle part of the suspension yoke plate, the head part of the suspension yoke plate is arranged above the horizontal connecting line of the left junction point and the right junction point to form an upper suspension structure, and the intersection point of the central line extension lines of the insulator string connecting structures at the left side and the right side is positioned above the gravity center of the upper suspension yoke plate.
Furthermore, the large L-shaped 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 large L-shaped equalizing ring is connected with the composite insulator string through the connecting bracket.
Furthermore, the bending angle of the L-shaped large equalizing ring can be adjusted according to the actual engineering condition.
Further, the composite insulator string is a composite insulator string or a disc insulator string.
Furthermore, the composite insulator string is composed of a composite insulator and a plurality of hardware fittings.
Furthermore, the disc insulator string is composed of a plurality of disc insulators and a plurality of hardware fittings.
Furthermore, the V-shaped insulator string further comprises a DB adjusting plate and a PT adjusting plate which are arranged between the iron tower cross arm and the insulator string connecting structure, and the iron tower cross arm, the DB adjusting plate, the PT adjusting plate and the insulator string 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 horizontal suspension connecting plate to improve and shorten the electrical clearance circle below the V-shaped string upwards, and the L-shaped large equalizing ring improves the electrical clearance circle on 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 yoke plate is lifted to be relatively flat, so that the moment of the wire on the insulator hardware string in windage yaw is reduced, and the stress of the insulator hardware string is improved. Therefore, the invention is suitable for the transmission line iron towers in mountain areas and strong wind areas, prevents the overhead transmission line from windage flashover and string dropping, avoids large-area power failure accidents, and improves the construction economy and the power supply reliability of the power grid.
Drawings
FIG. 1 is a front view of a top-loading type hanging V-shaped insulator string of the present invention;
FIG. 2 is a side view of a top-loading type hanging V-shaped insulator string according to the present invention;
reference numerals: 1-carrying type suspension connecting plate, 2-L type large equalizing ring, 3-composite insulator string, 4-small equalizing ring, 5-iron tower cross arm, 6-DB adjusting plate and 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 top-loading type suspension V-shaped insulator string comprises two groups of insulator string connecting structures and top-loading type suspension connecting plates, wherein one ends of the two groups of insulator string connecting structures are respectively connected to two sides of the top-loading type suspension connecting plates, and the other ends of the two groups of insulator string connecting structures are connected to cross arms of an iron tower 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, the top-loading type suspension V-shaped insulator string in the embodiment sequentially comprises a top-loading type suspension yoke plate 1, an L-shaped 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-carrying type suspension yoke plate 1 is connected with a composite insulator string 3, the L-shaped large equalizing ring 2 is connected with the lower part of the composite insulator string 3, the small equalizing ring 4 is connected with 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 joints of the upper suspension link plate 1 and the composite insulator string 3 are located at two sides of the middle of the upper suspension link plate 1, the head of the link plate is located above the horizontal connecting line of the joints, the intersection point of the central line extension lines of the left and right composite insulator strings 3 is located above the center of gravity of the upper suspension link plate 1, compared with the conventional suspension V-string, the present application adds the upper suspension link plate 1 to increase and shorten the electrical gap round below the V-string, thereby shortening the size of the tower window and reducing the weight of the iron tower. The upper-carrying type suspension connecting plate 1 is conventionally connected with the composite insulator string 3, detailed description is omitted, and 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 actual conditions such as air gaps, half of the included angle of the V string is generally an acute angle beta, and the included angle can be determined according to the tower pole planning result and the swing angle.
Example 2
On the basis of embodiment 1, the large L-shaped grading ring 2 is connected to the lower side portion of the composite insulator string 3, the small grading ring 4 is connected to the upper portion 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 connecting 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. Big equalizer ring of L type 2 lower parts with be an acute angle alpha between compound insulator chain 3's the vertical direction, for conventional V cluster, this application has increased after the big equalizer ring of L type is down bent angle alpha, improved the electric clearance circle of tower window side.
Preferably, the L-shaped large equalizing ring comprises an L-shaped equalizing ring and a connecting support, the connecting support is connected with the composite insulator string, the L-shaped large equalizing ring is arranged on the lower portion of the composite insulator string, and the bending angle alpha of the L-shaped equalizing ring is determined according to the actual engineering situation.
Example 3
On the basis of embodiment 2, composite insulator string 3 passes through the gold utensil such as DB adjusting plate 6, PT adjusting plate 7 and is connected with iron tower cross arm 5, can be convenient for adjust the length of gold utensil cluster and with the contained angle of V cluster according to actual conditions to adapt to the different operating mode tower window electrical clearance of different tower types.
Therefore, the application is suitable for the transmission line straight line iron tower in mountain areas and strong wind areas, prevents the overhead transmission line from windage flashover and string dropping, avoids the power failure accident of large area, and improves the economical efficiency of power grid construction and the reliability of power supply.
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 anti-pollution flashover capability, and compared with a disc-type insulator string, the composite insulator string is cheap in manufacturing cost and does not influence 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 field, and therefore, detailed description is omitted.
The invention is not limited to the foregoing embodiments. The invention extends to any novel feature or any novel combination of features disclosed in this specification and any novel method or process steps or any novel combination of features disclosed. Those skilled in the art to which the invention pertains will appreciate that insubstantial changes or modifications can be made without departing from the spirit of the invention as defined by the appended claims.
All of the features disclosed in this specification, or all of the steps in any method or process so disclosed, may be combined in any combination, except combinations of features and/or steps that are mutually exclusive.
Any feature disclosed in this specification may be replaced by alternative features serving equivalent or similar purposes, unless expressly stated otherwise. That is, unless expressly stated otherwise, each feature is only an example of a generic series of equivalent or similar features.
Claims (9)
1. A top-loading type suspension V-shaped insulator string is characterized by comprising two groups of insulator string connecting structures and a top-loading type suspension connecting plate, wherein one ends of the two groups of insulator string connecting structures are respectively connected to two sides of the top-loading type suspension connecting plate, and the other ends of the two groups of insulator string connecting structures are connected to a cross arm of an iron tower to form the V-shaped insulator string.
2. The top-loading type suspension V-shaped insulator string according to claim 1, wherein the insulator string connection structure comprises a large L-shaped grading ring, a composite insulator string and a small grading ring, the large L-shaped grading ring and the small L-shaped grading 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-bearing type suspension yoke plate.
3. The top-loading type suspension V-shaped insulator string according to claim 2, wherein the joints of the top-loading type suspension yoke plate and the insulator string connecting structure are located at two sides of the middle part of the suspension yoke plate, and the head of the suspension yoke plate is loaded above the horizontal connecting line of the left and right joints to form a top-loading type structure, and the intersection point of the central line extension lines of the insulator string connecting structures at the left and right sides is above the center of gravity of the top-loading type suspension yoke plate.
4. The top-loading type suspension V-shaped insulator string according to claim 2, wherein 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.
5. The top-loading type suspension V-shaped insulator string according to claim 4, wherein the bending angle of the large L-shaped grading ring is adjusted according to practical engineering conditions.
6. The top-loading type suspension V-shaped insulator string according to claim 4, wherein the composite insulator string is a composite insulator string or a disk insulator string.
7. The top-loading type suspension V-shaped insulator string according to claim 6, wherein the composite insulator string is composed of a composite insulator and a plurality of hardware fittings.
8. The top-loading type suspension V-shaped insulator string according to claim 6, wherein the disk insulator string is composed of a plurality of disk insulators and a plurality of hardware fittings.
9. The top-loading type suspension V-shaped insulator string according to claim 1, wherein the V-shaped insulator string further comprises a DB adjusting plate and a PT adjusting plate arranged between the iron tower cross arm and the insulator string connecting structure, and the iron tower cross arm, the DB adjusting plate, the PT adjusting plate and the insulator string connecting structure are connected in sequence.
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 |
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| 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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|---|---|
| CN111627620A true CN111627620A (en) | 2020-09-04 |
| CN111627620B 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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Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN112489896A (en) * | 2020-11-23 | 2021-03-12 | 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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Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN112489896A (en) * | 2020-11-23 | 2021-03-12 | 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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| CN111627620B (en) | 2024-05-24 |
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