CN216119753U - Novel ultrahigh-voltage porcelain-sheathed lightning arrester - Google Patents
Novel ultrahigh-voltage porcelain-sheathed lightning arrester Download PDFInfo
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- CN216119753U CN216119753U CN202122107618.6U CN202122107618U CN216119753U CN 216119753 U CN216119753 U CN 216119753U CN 202122107618 U CN202122107618 U CN 202122107618U CN 216119753 U CN216119753 U CN 216119753U
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Abstract
The utility model provides a novel superhigh pressure porcelain coat arrester, includes the unequal arrester component of diameter of series connection about two at least sections, wherein, the diameter of the arrester component of higher authority is less than the diameter of the arrester component below, is equipped with the equalizer ring in the upper end of the first section arrester component of top, is equipped with the base at the lower extreme of the first section arrester component of bottom, every section the arrester component is including taking the porcelain coat of full skirt the intracavity of porcelain coat is equipped with by the big, the low high performance metal zinc oxide resistance piece of pressure ratio of a plurality of through-flow energy and establishes ties, and the epoxy stick of reinforcing by 4 glass fiber passes through the core that upper electrode and bottom electrode fixed formation with metal zinc oxide resistance piece the upper end of porcelain coat is equipped with the flange the lower extreme of porcelain coat is equipped with the bottom flange. The utility model has the advantages of relatively low overall height, light weight, high earthquake resistance level and convenient transportation and installation.
Description
Technical Field
The utility model belongs to the technical field of ultrahigh voltage 330 kV-500 kV alternating current power transmission and transformation, and particularly relates to a novel ultrahigh voltage porcelain-sheathed lightning arrester.
Background
Ultra high voltage ac transmission is the most commonly used transmission system in power systems. The extra-high voltage ac arrester is an important protection device for an electric power system, and is connected in parallel to a line to prevent a power transmission system from being damaged by excessive voltage such as lightning and operation. At present, a porcelain-sheathed lightning arrester used in a 330 kV-500 kV ultrahigh voltage system is generally formed by connecting two or three sections of equal-diameter elements in series, adding a grading ring on the upper surface of the porcelain-sheathed lightning arrester and connecting an insulating base on the lower surface of the porcelain-sheathed lightning arrester. The lightning arrester with the structure has the problems of higher overall height, heavier weight, lower earthquake resistance level and inconvenient transportation and installation.
SUMMERY OF THE UTILITY MODEL
In order to solve the problems, the utility model provides a novel ultrahigh-voltage porcelain-sheathed lightning arrester which has relatively low overall height, light weight, high earthquake resistance level and convenient transportation and installation for the society.
The technical scheme of the utility model is as follows: the utility model provides a novel superhigh pressure porcelain coat arrester, including the unequal arrester component of diameter of series connection about two at least sections, wherein, the diameter of the arrester component of higher authority is less than the diameter of the arrester component below, is equipped with the equalizer ring in the upper end of the first section arrester component of top, is equipped with the base at the lower extreme of the first section arrester component, every section the arrester component is including taking the porcelain coat of full skirt the intracavity of porcelain coat is equipped with by the big, the low high performance metal zinc oxide resistance piece of pressure ratio of a plurality of through-flow energy and establishes ties, passes through the fixed core that forms of upper electrode and bottom electrode with metal zinc oxide resistance piece by the epoxy stick of 4 glass fiber reinforcements the upper end of porcelain coat is equipped with the flange the lower extreme of porcelain coat is equipped with the bottom flange.
As an improvement of the utility model, at least two sections of lightning arrester elements which are connected in series up and down and have different diameters are two, three, four or five sections of lightning arrester elements.
As an improvement to the utility model, the base adopts an internally-mounted structure, and the base is arranged in the lower flange of the lowest section of the lightning arrester element.
As an improvement to the utility model, the base comprises a first epoxy resin plate and a second epoxy resin plate, a low-voltage wiring terminal is arranged between the first epoxy resin plate and the second epoxy resin plate, the first epoxy resin plate, the second epoxy resin plate and the low-voltage wiring terminal are fixedly connected through a first fastening bolt to form the base, and the base passes through the lower flange and is fixedly connected with the lower flange; the lower electrode is connected with the low-voltage wiring terminal through a metal fixed connecting block.
As an improvement of the utility model, an upper sealing cover plate and an upper pressure plate are arranged in the upper flange, the upper sealing cover plate and the upper pressure plate are connected through a second fastening bolt, a positioning shaft is arranged on the lower bottom surface of the upper sealing cover plate, the lower end of the positioning shaft is propped against the upper electrode, and a first spring for compressing the upper electrode is arranged on the positioning shaft; and a second spring is arranged between the upper electrode and the resistance chip.
As an improvement of the present invention, a desiccant is provided between the lower electrode and the resistive sheet.
As an improvement of the utility model, the grading ring comprises a metal ring and a connecting piece, wherein the diameter of the metal ring is larger than that of the lightning arrester element, and the metal ring is fixedly connected with the connecting piece arranged on the upper flange through a plurality of pull rods.
As an improvement on the utility model, the metal oxide resistor disc has the characteristics of repeated charge transfer of 5.0C, 20kA 8/20 shock wave resistance, 1.68 voltage ratio and 120kA shock resistance of large current.
As an improvement of the utility model, the flanges between two adjacent sections of the lightning arrester elements are connected through third bolts.
Compared with the prior art, the utility model has the following advantages:
the utility model adopts a conical design with a small upper part and a large lower part, has the advantages of light overall weight, low gravity center and high strength, and can meet the use requirement of 9-degree earthquake fortification intensity areas with the horizontal acceleration of 0.5 g; the built-in type insulating base is adopted, has the functions of both the insulating base and the sealing cover plate, is mounted inside the lower flange of the lower element in a concealed manner, does not occupy external space, and reduces the overall height of the lightning arrester; the utility model adopts a split grading ring assembly structure, has simple manufacture, does not occupy space for transportation and storage, and is convenient for field installation; the utility model adopts the high-performance metal oxide resistance card with large D85 through-flow energy and low voltage ratio, the repeated transfer charge reaches 5.0C, the voltage ratio of 20kA 8/20 is 1.68, and the large current impacts 120 kA; the lightning arrester can be designed into a series of products, can be universally used for 330 kV-500 kV lightning arrester elements, and has the advantages of strong universality and economy.
Drawings
Fig. 1 is a schematic structural diagram of a 500kV porcelain arrester of the utility model.
Fig. 2 is a schematic structural diagram of the 400kV porcelain arrester.
Fig. 3 is a schematic structural diagram of the 330kV porcelain arrester.
Fig. 4 is a schematic cross-sectional view of one of the surge arrester components of fig. 1.
Detailed Description
Referring to fig. 1 to 4, fig. 1 to 4 disclose a novel ultra-high voltage porcelain-sheathed lightning arrester, which comprises at least two lightning arrester elements 1 with different diameters connected in series, wherein the diameter of the upper lightning arrester element is smaller than that of the lower lightning arrester element, the upper end of the uppermost lightning arrester element is provided with a grading ring 2, at the lower end of the lowermost section of the arrester element, each section of said arrester element comprises a porcelain jacket 102 with a shed 101 (see figure 4), a core body 100 which is formed by connecting a plurality of high-performance metal zinc oxide resistance sheets 104 with large through-flow energy and low pressure ratio in series and fixing the metal zinc oxide resistance sheets 104 by 4 glass fiber reinforced epoxy resin rods 105 through an upper electrode 106 and a lower electrode 107 is arranged in an inner cavity 103 of the porcelain outer sleeve 102, an upper flange 108 is arranged at the upper end of the porcelain jacket 102, and a lower flange 109 is arranged at the lower end of the porcelain jacket 102. The metal oxide resistance card 104 has the characteristics of repeated charge transfer of 5.0C, 20kA 8/20 shock wave resistance, 1.68 voltage ratio and high current 120kA shock resistance. In this embodiment, the lightning arrester elements with different diameters connected in series from top to bottom mean that the diameters of the inner cavities 103 of the lightning arrester elements are different, and the diameter of the resistance sheet 104 of the lightning arrester element with a small inner cavity 103 is correspondingly smaller, whereas the diameter of the resistance sheet 104 is larger.
Preferably, the base 3 comprises a first epoxy resin plate 31 and a second epoxy resin plate 32, a low-voltage terminal 33 is arranged between the first epoxy resin plate 31 and the second epoxy resin plate 32, the first epoxy resin plate 31, the second epoxy resin plate 32 and the low-voltage terminal 33 are fixedly connected through a first fastening bolt 34 to form the base 3, and the base 3 is fixedly connected with the lower flange 109 through the lower flange 109; the lower electrode 107 is connected to the low-voltage connection terminal 33 through a metal fixing connection block 110. A drying agent 111 is arranged between the lower electrode 109 and the resistor sheet 104 close to the lower electrode 109, and is used for drying the inner cavity 103 of the porcelain outer sleeve 102 and keeping the inner cavity 103 in a dry state.
Preferably, an upper sealing cover plate 112 and an upper pressure plate 113 are arranged in the upper flange 108, the upper sealing cover plate 112 and the upper pressure plate 113 are connected through a second fastening bolt 114, a positioning shaft 115 is arranged on the lower bottom surface of the upper sealing cover plate 112, the lower end of the positioning shaft 115 is abutted against the upper electrode 106 through a positioning shaft sleeve 116 (the positioning shaft sleeve 116 may not be arranged, and the positioning shaft 115 is directly abutted against the upper electrode 106), and a first spring 117 for pressing the upper electrode 106 is arranged on the positioning shaft 115; a second spring 118 is arranged between the upper electrode 106 and the resistive sheet 104 for pressing the resistive sheet 104, and an adjusting pad 119 is further arranged between the adjacent resistive sheets 104 as required for adjusting the height of the core body 100.
Referring to fig. 1 again, fig. 1 is a schematic structural diagram of the 500kV porcelain arrester of the present invention. The 500kV porcelain arrester comprises three sections of arrester elements 1, wherein the upper arrester element 11 is arranged on the top, the middle arrester element 12 is arranged in the middle, the lower arrester element 13 is arranged below, the grading ring 1 is arranged at the top end of the upper arrester element 11, and the base 3 is arranged at the lower end of the lower arrester element 13 and is arranged in the lower flange 109; the grading ring 2 comprises a metal ring 21 and a connecting piece 22, the diameter of the metal ring is larger than that of the lightning arrester element, and the metal ring 21 is fixedly connected with the connecting piece 22 arranged on the upper flange 108 through a plurality of pull rods 23. Flanges between two adjacent sections of lightning arrester elements are connected through third bolts 14; in this embodiment, a second grading ring 24 is further included, so that the grading effect is better. Fig. 1 shows three sections of the lightning arrester element 1, and the utility model can be designed into four or five sections of the lightning arrester element 1 according to requirements.
Referring to fig. 2, fig. 2 is a schematic structural diagram of a 400kV porcelain arrester of the present invention. The 400kV porcelain-sheathed lightning arrester is similar to the 500kV porcelain-sheathed lightning arrester in structure and also comprises an upper lightning arrester element 11, an upper lightning arrester element 12 and a lower lightning arrester element 13 which are connected in series, wherein the upper lightning arrester element 11, the lower lightning arrester element 12 and the 500kV porcelain-sheathed lightning arrester element are the same, and the lower lightning arrester element 13 is slightly lower in height.
Referring to fig. 3, fig. 3 is a schematic structural diagram of a 330kV porcelain arrester according to the present invention. The 300kV porcelain-sheathed lightning arrester is formed by connecting two lightning arrester elements in series, wherein the two lightning arrester elements are the same as the upper lightning arrester element 11 and the middle lightning arrester element 12 of the 500kV porcelain-sheathed lightning arrester.
By the design, the lightning arrester can form a series of products, can be universally used for 330 kV-500 kV lightning arrester elements, and has the advantages of strong universality and economy.
Claims (8)
1. The utility model provides a novel superhigh pressure porcelain overcoat arrester which characterized in that: the lightning arrester comprises at least two lightning arrester elements which are connected in series vertically and have different diameters, wherein the diameter of the lightning arrester element on the lightning arrester element is smaller than that of the lightning arrester element below the lightning arrester element, an equalizing ring is arranged at the upper end of the lightning arrester element on the top, a base is arranged at the lower end of the lightning arrester element on the bottom, each lightning arrester element comprises a porcelain jacket with an umbrella skirt, a plurality of high-performance metal zinc oxide resistance sheets which are large in through-flow energy and low in voltage ratio are connected in series are arranged in an inner cavity of the porcelain jacket, a core body which is formed by fixing the metal zinc oxide resistance sheets through an upper electrode and a lower electrode is formed by 4 glass fiber reinforced epoxy resin rods, an upper flange is arranged at the upper end of the porcelain jacket, and a lower flange is arranged at the lower end of the porcelain jacket.
2. The novel ultra-high voltage porcelain-sheathed arrester according to claim 1, characterized in that: at least two sections of lightning arrester elements which are connected in series up and down and have different diameters are two, three, four or five sections of lightning arrester elements.
3. The novel ultra-high voltage porcelain-sheathed arrester according to claim 1 or 2, characterized in that: the base adopts built-in structure, and the base sets up in the lower flange of the lower section arrester component.
4. The novel ultra-high voltage porcelain-sheathed arrester according to claim 3, characterized in that: the base comprises a first epoxy resin plate and a second epoxy resin plate, a low-voltage wiring terminal is arranged between the first epoxy resin plate and the second epoxy resin plate, the first epoxy resin plate, the second epoxy resin plate and the low-voltage wiring terminal are fixedly connected through a first fastening bolt to form the base, and the base penetrates through the lower flange and is fixedly connected with the lower flange; the lower electrode is connected with the low-voltage wiring terminal through a metal fixed connecting block.
5. The novel ultra-high voltage porcelain-sheathed arrester according to claim 1 or 2, characterized in that: an upper sealing cover plate and an upper pressure plate are arranged in the upper flange, the upper sealing cover plate and the upper pressure plate are connected through a second fastening bolt, a positioning shaft is arranged on the lower bottom surface of the upper sealing cover plate, the lower end of the positioning shaft abuts against the upper electrode, and a first spring for compressing the upper electrode is arranged on the positioning shaft; and a second spring is arranged between the upper electrode and the resistance chip.
6. The novel ultra-high voltage porcelain-sheathed arrester according to claim 1 or 2, characterized in that: and a drying agent is arranged between the lower electrode and the resistance card.
7. The novel ultra-high voltage porcelain-sheathed arrester according to claim 1 or 2, characterized in that: the grading ring comprises a metal ring and a connecting piece, wherein the diameter of the metal ring is larger than that of the lightning arrester element, and the metal ring is fixedly connected with the connecting piece arranged on the upper flange through a plurality of pull rods.
8. The novel ultra-high voltage porcelain-sheathed arrester according to claim 1 or 2, characterized in that: and flanges between two adjacent sections of lightning arrester elements are connected through a third bolt.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202122107618.6U CN216119753U (en) | 2021-09-02 | 2021-09-02 | Novel ultrahigh-voltage porcelain-sheathed lightning arrester |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202122107618.6U CN216119753U (en) | 2021-09-02 | 2021-09-02 | Novel ultrahigh-voltage porcelain-sheathed lightning arrester |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN216119753U true CN216119753U (en) | 2022-03-22 |
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Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN202122107618.6U Active CN216119753U (en) | 2021-09-02 | 2021-09-02 | Novel ultrahigh-voltage porcelain-sheathed lightning arrester |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN216119753U (en) |
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2021
- 2021-09-02 CN CN202122107618.6U patent/CN216119753U/en active Active
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