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Shield sealing structure of external current transformer in GIS

A technology of current transformer and sealing structure, applied in the direction of inductor, transformer/inductor shell, transformer/inductor parts, etc. The effect of the sealing effect

Active Publication Date: 2020-05-22
HENAN PINGGAO ELECTRIC +2
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0004] The purpose of the present invention is to provide a shield sealing structure of an external current transformer in GIS, which is used to solve the technical problem of inconvenient coil maintenance caused by the shield sealing structure of an external current transformer in GIS in the prior art

Method used

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  • Shield sealing structure of external current transformer in GIS
  • Shield sealing structure of external current transformer in GIS
  • Shield sealing structure of external current transformer in GIS

Examples

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specific Embodiment 1

[0042] Such as Figure 2 to Figure 4 As shown, the shield sealing structure of the external current transformer in the GIS of the present invention includes a support cylinder 2 , a coil shield 5 , and an annular gasket 3 arranged between the support cylinder 2 and the coil shield 5 .

[0043] The supporting cylinder 2 is for the corresponding central conductor 1 in the GIS to pass through, and the transformer coil 4 is sleeved on its outside. The outer peripheral surface of the supporting cylinder 2 is provided with an annular boss 21, and one end of the annular gasket 3 is along the supporting cylinder. 2 is axially positioned on the annular boss 21. A coil shield 5 is provided on the outer cover of the transformer coil 4, and the coil shield 5 is used to protect the coil.

[0044]The coil shield 5 includes two shield bodies, the cross-section of the shield body is semi-circular, and the two sides of each shield body are provided with flange edges, and the bolt fasteners pa...

specific Embodiment 2

[0050] In Embodiment 1, the coil shield consists of two shield bodies. The difference between this embodiment and Embodiment 1 is that the coil shield is integrally formed with a thin-walled structure, and the thin-walled structure has certain shrinkability, so that The vertical folds on it can be tightened radially.

specific Embodiment 3

[0052] In Embodiment 1, the vertical flange is semi-circular, and the annular gasket is compressed by pressing the vertical flange with the ring hoop. The difference between this embodiment and Embodiment 1 is that the vertical flange is curved. Less than π / 2 arc-shaped vertical flange, and no deformation groove is set on it, but formed by the interval between two adjacent vertical flanges, ear plates are provided on the vertical flanges, and the bolts are fastened The vertical flange shrinks when the piece passes through the corresponding two ear plates, and then the annular gasket is compressed.

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Abstract

The invention relates to a shield sealing structure of an external current transformer in a GIS. The structure comprises: a support cylinder for a corresponding central conductor in the GIS to pass through, wherein a transformer coil sleeved outside the support cylinder; and a coil protective cover which covers the outer side of the mutual inductor coil, wherein the top of the coil protective cover is provided with an inner flange, the inner flange is used for shielding the top end of the mutual inductor coil, the radial inner side edge of the inner flange defines an avoiding opening for avoiding the supporting cylinder, a vertical folded edge is arranged on the edge of the radial inner side of the inner turned edge and extends in the axial direction of the coil protective cover, the shield sealing structure further comprises an annular sealing gasket, and the annular sealing gasket is arranged between the vertical folded edge and the outer circumferential face of the supporting cylinder. The avoiding opening is a contractible avoiding opening and is used for pressing the annular sealing gasket in the contracting process, the protective cover can be rapidly and conveniently detached from the supporting cylinder, the protective cover cannot be damaged, and therefore the coil is convenient to maintain.

Description

technical field [0001] The invention belongs to the technical field of gas-insulated metal-enclosed switches, and in particular relates to a shield sealing structure of an external current transformer in a GIS. Background technique [0002] The external current transformer in GIS, that is, the secondary coil is located outside the SF6 gas chamber, is widely used because it is easier to install, maintain and repair than the built-in current transformer. [0003] The shield sealing structure of the external current transformer for GIS in the prior art, such as figure 1 As shown, it includes a support cylinder 106, and the outside of the support cylinder 106 is provided with a transformer coil 105, and the outside of the transformer coil 105 is provided with a protective cover 104, and the epoxy resin material is poured between the protective cover 104 and the support cylinder 106 103 are solidified together, so as to prevent the secondary coil 105 from being damp and reduce t...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): H01F27/02H01F38/30
CPCH01F27/02H01F27/022H01F38/30
Inventor 朱传运赵利军黄坤鹏薛红涛王小东李伟强董斌张皓祺黄鑫秦泳
Owner HENAN PINGGAO ELECTRIC
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