A voltage equalizing component and a GIS arrester

Abstract

The present invention discloses a voltage equalizing component and a GIS lightning arrester. The voltage equalizing component includes two voltage equalizing covers and a plurality of support columns. The two voltage equalizing covers are both vertically arranged cylindrical members spaced vertically. The plurality of support columns are all vertically arranged and circumferentially spaced between the two voltage equalizing covers. The two ends of each support column are connected to the mutually close ends of the two voltage equalizing covers. The voltage equalizing covers and the support columns are all made of metal materials. By arranging a plurality of support columns circumferentially spaced between the two voltage equalizing covers, a hollow structure is formed between the two voltage equalizing covers, so that after noise enters between the voltage equalizing components, it will not be amplified, but instead the vibration will be weakened to reduce the noise.

Description

Technical Field

[0001] The present invention belongs to the technical field of primary power transmission and distribution equipment, and particularly relates to a voltage equalizing component and a GIS lightning arrester. Background Art

[0002] Due to the excellent non-linear resistance characteristics of zinc oxide lightning arresters, they have been widely used in power systems. Currently, the voltage equalizing structure used in GIS lightning arresters is a circular straight cylinder shape, which may cause abnormal noises in the lightning arrester in terms of structure, affecting its safety and reliability during operation and adding unnecessary power outage maintenance work for users. Among them, the specific source of the abnormal noise is as follows: During the normal operation of the power system, noise is generated by iron-core equipment such as transformers and reactors. The noise is transmitted through the GIS combined electrical apparatus. Since the GIS lightning arrester is installed at the end of the combined electrical apparatus, when the noise is conducted to the GIS lightning arrester, the voltage equalizing component acts as the function of a horn, and the noise is amplified at the voltage equalizing component, resulting in abnormal noises inside the lightning arrester, causing users to suspect quality problems with the lightning arrester. Summary of the Invention

[0003] In order to solve the above technical problems, the purpose of the present invention is to provide a voltage equalizing component with a simple structure, good voltage equalizing effect, and noise reduction function.

[0004] In order to achieve the above purpose, the technical solution of the present invention is as follows: A voltage equalizing component includes two voltage equalizing covers and a plurality of support columns. Both of the two voltage equalizing covers are vertically arranged and axially spaced cylindrical members. The plurality of support columns are all vertically arranged and circumferentially spaced between the two voltage equalizing covers. Both ends of each support column are connected to the mutually adjacent ends of the two voltage equalizing covers. The voltage equalizing covers and the support columns are all made of metal materials.

[0005] The beneficial effect of the above technical solution is that: By arranging a plurality of circumferentially spaced support columns between the two voltage equalizing covers, a hollow structure is formed between the two voltage equalizing covers, so that after the noise enters this voltage equalizing component, it will not be amplified, but instead the vibration will be weakened to reduce the noise.

[0006] In the above technical solution, the support columns are cylinders with a diameter of 8 - 16 mm and the number is 4 - 8.

[0007] The beneficial effect of the above technical solution is that: Their sizes are appropriate and they can well support the two voltage equalizing covers.

[0008] In the above technical solution, the wall thickness of the voltage equalizing cover is 3 - 4 mm and the height is 100 - 150 mm.

[0009] The beneficial effect of the above technical solution is that: Their sizes are appropriate.

[0010] In the above technical solution, the cross-section of the grading cover is circular ring-shaped, and both ends of the outer side wall of the grading cover are chamfered into an arc shape, and the arc diameter corresponding to the chamfered parts at both ends of the grading cover is 20 - 50 mm.

[0011] The beneficial effect of the above technical solution is that: both ends of the grading cover are chamfered into an arc shape, which can improve the electric field strength at the high-voltage end inside the lightning arrester and increase the ability of the lightning arrester to withstand insulation voltage.

[0012] In the above technical solution, the middle part of the upper end of the grading cover located above is recessed downward and turned inward to form an installation groove with a perforation in the middle of the groove bottom wall, and a plurality of first connection holes are circumferentially and spacedly arranged on the groove bottom wall of the installation groove.

[0013] The beneficial effect of the above technical solution is that: its structure is simple and the assembly is convenient.

[0014] In the above technical solution, both the grading cover and the support column are made of aluminum.

[0015] The beneficial effect of the above technical solution is that: in this way, the weight of the grading component can be reduced, which is convenient for assembly.

[0016] The second object of the present invention is to provide a GIS lightning arrester with a simple structure and low noise during operation.

[0017] In order to achieve the above object, the technical solution of the present invention is as follows: a GIS lightning arrester includes the grading component as described above.

[0018] The beneficial effect of the above technical solution is that: in this way, the electric field strength inside the lightning arrester can be optimized; and the uneven voltage distribution of the lightning arrester can be effectively improved. Through the hollow gap between the two grading covers, the abnormal noise inside the lightning arrester caused by noise can be eliminated. BRIEF DESCRIPTION OF THE DRAWINGS

[0019] Figure 1 It is the side view of the grading component described in Embodiment 1 of the present invention;

[0020] Figure 2 It is the cross-sectional view of the grading component described in Embodiment 1 of the present invention;

[0021] Figure 3 It is the top view of the grading component described in Embodiment 1 of the present invention;

[0022] Figure 4 It is the cross-sectional view of the GIS lightning arrester described in Embodiment 2 of the present invention.

[0023] In the figure: 1 grading component, 11 grading cover, 111 installation groove, 12 support column, 1111 perforation, 1112 first connection hole, 2 insulator, 3 connection conductor, 4 core component, 5 cylinder shell, 6 bottom cover, 7 grounding terminal. Detailed implementation mode

[0024] The principles and features of the present invention will be described below in conjunction with the accompanying drawings. The examples given are only used to explain the present invention and are not intended to limit the scope of the present invention. In the following paragraphs, the present invention will be described more specifically by way of example with reference to the accompanying drawings. According to the following description and claims, the advantages and features of the present invention will be more clearly described. It should be noted that the accompanying drawings are all in a very simplified form and use non-precise scales, and are only used to facilitate and clearly assist in explaining the purpose of the embodiments of the present invention.

[0025] Embodiment 1

[0026] As Figures 1 - 3 shown, this embodiment provides a voltage equalizing component, including two voltage equalizing covers 11 and a plurality of support columns 12. The two voltage equalizing covers 11 are both vertically arranged and vertically spaced cylindrical members. The plurality of support columns 12 are all vertically arranged and circumferentially spaced between the two voltage equalizing covers 11. The two ends of each support column 12 are connected to the closer ends of the two voltage equalizing covers 11. The voltage equalizing covers 11 and the support columns 12 are both made of metal materials. By arranging a plurality of circumferentially spaced support columns between the two voltage equalizing covers, a hollow structure is formed between the two voltage equalizing covers, so that when noise enters between this voltage equalizing component, it will not be amplified, but instead the vibration will be weakened to reduce the noise.

[0027] In the above technical solution, the support column 12 is a cylinder with a diameter of 8 - 16 mm (which can be 8 mm, 9 mm, 10 mm, 11 mm, 12 mm, 13 mm, 14 mm, 15 mm, 16 mm), and the number is 4 - 8. Its size is moderate and it can well support the two grading hoods (the length is determined according to the simulation calculation results of voltage distribution); the wall thickness of the grading hood 11 is 3 - 4 mm (which can be 3 mm, 3.1 mm, 3.2 mm, 3.3 mm, 3.4 mm, 3.5 mm, 3.6 mm, 3.7 mm, 3.8 mm, 3.9 mm, and 4 mm), and the height is 100 - 150 mm (which can be 100 mm, 110 mm, 120 mm, 130 mm, 140 mm, and 150 mm), and its size is moderate; the cross-section of the grading hood 11 is an annular ring, and both ends of the outer side wall of the grading hood 11 are chamfered into an arc shape, and the arc diameter corresponding to the chamfered parts at both ends of the grading hood 11 is 20 - 50 mm (which can be 20 mm, 25 mm, 30 mm, 35 mm, 40 mm, 45 mm, and 50 mm). Chamfering both ends of the grading hood into an arc shape can improve the electric field strength at the high-voltage end inside the lightning arrester and increase the ability of the lightning arrester to withstand insulation voltage. By increasing the arc radius at both ends of the grading hood and the diameter of the support column, the electric field strength at the high-voltage end inside the lightning arrester can be improved, and the ability of the lightning arrester to withstand insulation voltage can be increased. By lengthening the length of the support column, the non-uniformity coefficient of the voltage distribution inside the lightning arrester can be reduced, and the charging rate of the lightning arrester can be lowered [charging rate = (continuous operating voltage of the system relative to the ground / reference voltage of the lightning arrester) * non-uniformity coefficient of voltage distribution], thereby improving the operating reliability of the lightning arrester.

[0028] In the above technical solution, the middle part of the upper end of the grading hood 11 located above is recessed downward and turned inward to form an installation groove 111 with a perforation 1111 in the middle of the groove bottom wall. A plurality of first connection holes 1112 are circumferentially and spacedly arranged on the groove bottom wall of the installation groove 111. Its structure is simple and the assembly is convenient.

[0029] In the above technical solution, both the grading hood 11 and the support column 12 are made of aluminum parts, which can reduce the weight of the grading parts and facilitate assembly [the support column and the two grading hoods can be welded into one body, which can increase the strength of the grading parts, and through the gap between the support columns (the formed hollow structure), the transmitted visible noise can be attenuated].

[0030] Among them, in this embodiment, a plurality of the support columns 12 are distributed on the same ring between the two grading hoods 11, and the ring where the plurality of support columns are located is coaxially distributed with the two grading hoods.

[0031] Embodiment 2

[0032] As Figure 4As shown, this embodiment provides a GIS lightning arrester, which includes the grading component 1 as described in Embodiment 1, so as to optimize the internal electric field strength of the lightning arrester; and effectively improve the uneven voltage distribution of the lightning arrester. Through the hollow gap between the two grading covers, the abnormal noise inside the lightning arrester caused by noise can be eliminated.

[0033] In this embodiment, the GIS lightning arrester includes a grading component 1, an insulator 2, a connecting conductor 3, a core component 4, a cylinder shell 5, a bottom cover 6 and a grounding terminal 7. Its assembly method can be similar to the assembly method disclosed in the document numbered CN217239181U "A GIS Lightning Arrester Using High-Gradient Zinc Oxide Resistor Chips". The installation groove at the upper end of the grading component is for the lower end of the connecting conductor 3 to be inserted. A bolt or screw is inserted at each of the first connecting holes to connect with the lower end of the connecting conductor 3 (a threaded hole is concavely provided upward at the corresponding position of the lower end of the connecting conductor 3). The core component coaxially passes through the grading component and through the through hole to connect with the middle of the lower end of the connecting conductor 3. In this embodiment, when the insulator 2 and the cylinder shell 5 are installed, it is recessed downward (opposite to the installation method in the document numbered CN217239181U "A GIS Lightning Arrester Using High-Gradient Zinc Oxide Resistor Chips"), so that the structure of the GIS lightning arrester is more compact and the installation is more convenient.

[0034] The grading component adopted in this embodiment has the function of attenuating vibration (that is, attenuating the noise generated by vibration), so that the GIS lightning arrester has the function of noise reduction (instead of the grading component of the GIS lightning arrester in the prior art amplifying the noise).

[0035] The above is only the preferred embodiment of the present invention, and it does not impose any form of limitation on the present invention; any ordinary technician in the industry can smoothly implement the present invention as shown in the accompanying drawings of the specification and as described above; however, any equivalent changes made by those skilled in the art within the scope of the technical solution of the present invention by using the technical content disclosed above, such as minor modifications, decorations and evolutions, are all equivalent embodiments of the present invention; at the same time, any equivalent changes, modifications and evolutions made to the above embodiments based on the essence of the present invention still fall within the protection scope of the technical solution of the present invention.

Claims

1. A voltage equalizing component, characterized in that, It includes two voltage equalizing covers (11) and multiple support columns (12). The two voltage equalizing covers (11) are both vertically arranged tubular parts with vertical interval distribution. The multiple support columns (12) are all vertically arranged and circumferentially spaced between the two voltage equalizing covers (11). Both ends of each support column (12) are connected to the mutually approaching ends of the two voltage equalizing covers (11). The voltage equalizing covers (11) and the support columns (12) are both made of metal materials. The middle part of the upper end of the voltage equalizing cover (11) located above is recessed downward and has an inward flanging to form an installation groove (111) with a perforation (1111) provided in the middle of the groove bottom wall. A plurality of first connection holes (1112) are circumferentially spaced on the groove bottom wall of the installation groove (111). The support column (12) is a cylinder with a diameter of 8 - 16 mm.

2. The voltage equalizing component according to claim 1, wherein The number of the support columns (12) is 4 - 8.

3. The voltage equalizing component according to claim 1, characterized in that, The wall thickness of the voltage equalizing cover (11) is 3 - 4 mm, and the height is 100 - 150 mm.

4. The voltage equalizing component according to claim 1, wherein The cross-sections of the voltage equalizing covers (11) are all circular rings, and both ends of the outer side walls of the voltage equalizing covers (11) are chamfered into circular arcs.

5. The voltage equalizing component according to claim 4, characterized in that, The arc diameters corresponding to the chamfered parts at both ends of the voltage equalizing cover (11) are 20 - 50 mm.

6. The voltage equalizing component according to claim 1, characterized in that, The voltage equalizing covers (11) and the support columns (12) are both made of aluminum.

7. A GIS lightning arrester, characterized in that, It includes the voltage equalizing part (1) according to any one of claims 1 - 6.

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