CN215896070U - Disk-type suspension insulator type grading ring - Google Patents
Disk-type suspension insulator type grading ring Download PDFInfo
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- CN215896070U CN215896070U CN202121214065.8U CN202121214065U CN215896070U CN 215896070 U CN215896070 U CN 215896070U CN 202121214065 U CN202121214065 U CN 202121214065U CN 215896070 U CN215896070 U CN 215896070U
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Abstract
The utility model discloses a disk-type suspension insulator type grading ring, which is provided with an iron cap and a steel pin, wherein an insulator disk made of insulating materials is arranged between the iron cap and the steel pin, and the disk-type suspension insulator type grading ring is characterized in that a circular metal grading ring body is arranged inside the outer end part of the insulator disk. The insulator string has the advantages that the structure and the specification of the iron cap and the steel pins of the grading ring, which are the same as those of the steel pins and the iron cap of the insulator string, are innovated, the grading ring can be completely exchanged, and a series of problems caused by installation errors can be avoided. The outer shape structure of the insulator chain is the same as the insulator shape of the original insulator chain, bird droppings can be effectively prevented from dropping on the grading ring to cause bird droppings pollution, and bird droppings are prevented from being drawn into a high-voltage electric field to form flashover. The stability of the high voltage line is enhanced. In addition, the disk-type suspended insulator type grading ring can also play a role in striking an arc, and meanwhile, the grading ring also has a function of weakening local corona at the end part. Effectively improve the voltage distribution of the insulators in the insulator string and reduce the deterioration rate of the first insulator.
Description
Technical Field
The utility model belongs to equipment used in an electric power transmission and transformation circuit, in particular to a grading ring used in a high-voltage and ultrahigh-voltage power transmission and transformation circuit, and particularly relates to a disk-shaped suspension insulator grading ring.
Background
At present, the power transmission lines of 110kV and above all adopt equalizing rings, generally, one equalizing ring is used for 110kV, and 2 equalizing rings are used for 220kV and above. The national electric power industry standard DLT760.3 grading ring, shield ring and grading shield ring specifies the grading ring standard with higher voltage class. The function of the insulator is to evenly distribute the voltage on the whole insulator or insulator string. Typically one or more circular rings or other annular structures, secured to the suspension insulator string. Years of practice prove that the most effective and reasonable structure is a circular ring-shaped grading ring. The grading ring is used on the insulator string, so that the problems of birds lodging on the grading ring, standing and the like are inevitably caused, pollution of bird dung and the like exists, and damage such as net flashover and the like can be caused by the fact that the bird dung is drawn into a high-voltage electric field in rainy and snowy fog days. Chinese patent No. 2015204654404 discloses a "110 kV transmission line grading ring insulator string", wherein the grading ring is installed at a reasonable position in a suspension insulator string by a set of innovative structures. However, in practical applications, there are problems such as an error, a deviation, or an out-of-position mounting position of the strap due to problems such as uncertainty of the mounting position and human factors. When the installation position of the grading ring is incorrect, the grading ring cannot play a role in grading the composite insulator, and can also accelerate the aging of the organic silicon rubber of the composite insulator, so that the hydrophobicity of the silicon rubber disappears, the discharge ablation appears, partial discharge and even comprehensive flashover can be further caused, and the service life of the composite insulator is greatly influenced. Even more so, it causes a serious accident that the whole line stops working. In order to overcome these problems, the present inventors have earnestly studied to provide the object of the present invention.
Disclosure of Invention
The utility model aims to overcome the defects that the grading ring cannot achieve the aims of grading, protection and the like due to incorrect installation position and various problems caused by pollution of weather and bird excrement. I.e., to provide a disk-type suspended insulator type grading ring.
The technical scheme of the utility model is realized in such a way that the disk-shaped suspension insulator type grading ring is provided with an iron cap (1) and a steel foot (2), and an insulator disk (3) made of insulating materials is arranged between the iron cap and the steel foot, and is characterized in that a circular metal grading ring body (4) is arranged inside the outer end part of the insulator disk.
The beneficial technical effects of the utility model are as follows: the structure and the specification of the iron cap and the steel pins of the grading ring, which are the same as those of the steel pins and the iron cap of the insulator string, are innovated, the grading ring can be completely exchanged, the installation method is the same as that of the traditional disc insulator, the steel pins are directly hung in the matching grooves on the iron cap, the method is simple and convenient, the problem of installation errors does not exist, and a series of problems caused by the installation errors can be avoided. The outer shape structure of the insulator chain is the same as the insulator shape of the original insulator chain, bird droppings can be effectively prevented from dropping on the grading ring to cause bird droppings pollution, and bird droppings are prevented from being drawn into a high-voltage electric field to form flashover. The stability of the high voltage line is enhanced. In addition, the disk-shaped suspension insulator type grading ring can also play a role in arc striking, discharge flashover generated on a circuit occurs between the upper grading ring and the lower grading ring, the surface of the synthetic shed is protected from being burnt, and meanwhile, the grading ring also has a function of weakening local corona at the end part. Effectively improve the voltage distribution of the insulators in the insulator string and reduce the deterioration rate of the first insulator.
Drawings
Fig. 1 is a schematic structural half-section of the inventive concept of a disk-type suspended insulator type grading ring of the present invention, and fig. 2 is a schematic partial structural section with the addition of a concentric grading ring and a connecting wire or a metal thin plate. The numbers in the drawings are: 1. the metal grading ring comprises an iron cap, 2, a steel pin, 3, an insulator disc, 4, a metal grading ring body, 5 and a lead or a metal sheet.
Detailed Description
The details of the construction and use of the utility model are set forth in the accompanying drawings and the description below. Referring to the attached drawings, the disk-type suspension insulator type grading ring is provided with an iron cap (1) and a steel pin (2), an insulator disk (3) made of insulating materials is arranged between the iron cap and the steel pin, and the disk-type suspension insulator type grading ring is characterized in that a circular metal grading ring body (4) is arranged inside the outer end part of the insulator disk. The insulating material of the insulator disc can be ABS resin, can also be epoxy resin glass fiber composite material, and can also be other insulating materials with certain rigidity and reliable insulating property. The metal ring can be an aluminum or aluminum alloy ring, and can also be other metal materials meeting the standard specification.
In order to further improve the using effect and the structural effect of the grading ring, the inner side of the annular metal grading ring body (4) close to the axis of the iron cap (1) and the steel pin (2) is at least provided with an annular metal grading ring body. For insulator strings with ultra-large diameters, more than one grading ring can be added to form a grading ring group so as to meet the requirement of higher and higher power supply and transmission voltage grades.
In order to further improve the service performance and reliability of the grading ring, the annular metal grading ring body (4) and the grading ring body on the inner side of the annular metal grading ring body are connected through a wire to form a ring-shaped conductor which is mutually conducted.
In order to further improve the use performance and reliability of the grading ring, the annular metal grading ring body (4) and the grading ring body on the inner side of the annular metal grading ring body can be connected through a metal sheet to form the grading ring with the rib plates.
Claims (4)
1. A disk-type suspension insulator type grading ring is provided with an iron cap (1) and a steel pin (2), an insulator disk (3) made of insulating materials is arranged between the iron cap and the steel pin, and the disk-type suspension insulator type grading ring is characterized in that a circular metal grading ring body (4) is arranged inside the outer end part of the insulator disk.
2. A disk suspended insulator type grading ring according to claim 1, characterized by that the inside of the ring shaped metal grading ring body (4) near the axis of the iron cap (1) and steel leg (2) has at least one ring shaped metal grading ring body.
3. A disk-type suspended insulator type grading ring according to claim 1, characterized in that the ring-shaped metal grading ring body (4) is connected with the grading ring body inside by wire to form a ring-shaped conductor that is conducted with each other.
4. A disk-type suspended insulator type grading ring according to claim 1, characterized in that the ring-shaped metal grading ring body (4) is connected with its inside grading ring body by metal thin plate to form a grading ring with ribbed plates.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202121214065.8U CN215896070U (en) | 2021-05-28 | 2021-05-28 | Disk-type suspension insulator type grading ring |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202121214065.8U CN215896070U (en) | 2021-05-28 | 2021-05-28 | Disk-type suspension insulator type grading ring |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN215896070U true CN215896070U (en) | 2022-02-22 |
Family
ID=80561440
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN202121214065.8U Active CN215896070U (en) | 2021-05-28 | 2021-05-28 | Disk-type suspension insulator type grading ring |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN215896070U (en) |
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2021
- 2021-05-28 CN CN202121214065.8U patent/CN215896070U/en active Active
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