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Transformer coil protection structure and preparation method thereof

A transformer coil and protective structure technology, applied in the field of transformers, can solve problems such as dust or foreign matter that cannot be detected, high-voltage coil damage and insulation, and transformer coil burnout, etc., to achieve the effects of isolating external pollution, strengthening insulation, and enhancing mechanical strength

Pending Publication Date: 2019-07-23
CHONGQING YUANTONG ELECTRICAL APPLIANCE EQUIP MFG CO LTD
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0003] At present, the SG open impregnated dry-type transformer has a high-voltage coil with a pie-shaped structure, and the coil is exposed outside. During transportation and installation, the high-voltage coil is prone to be knocked and the insulation will be damaged. Dust or foreign matter can easily enter the coil and cause damage. Undetectable, leading to coil burnout accidents during transformer operation, causing huge economic losses to users

Method used

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  • Transformer coil protection structure and preparation method thereof
  • Transformer coil protection structure and preparation method thereof
  • Transformer coil protection structure and preparation method thereof

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0039] A method for preparing a protective structure for a transformer coil mainly includes the following steps:

[0040] S1: Insert 300 spacers 211 on the T-shaped stays 22 according to the height of the coil 1;

[0041] S2: Wind the coil 1 on the insulating cylinder 2, and stop winding when the distance between the coil 1 and the top of the spacer 211 is 12 mm;

[0042] S3: wrapping the insulating paper tape 3 half-stacked on the free end of the block group 21 in an interlaced manner, and winding the insulating paper tape 3 with a thickness of 0.2mm;

[0043]S4: Winding the glass ribbon 4 outside the insulating paper tape 3, the thickness of the glass ribbon 4 being wound is 0.1 mm;

[0044] S5: Drying the coils processed in step S4;

[0045] S6: Then, under vacuum pressure, dip the coil treated in step S5 in the environmental protection paint, and put it into a curing furnace for curing.

Embodiment 2

[0047] A method for preparing a protective structure for a transformer coil mainly includes the following steps:

[0048] S1: Insert 200 spacers 211 on the T-shaped stays 22 according to the height of the coil 1;

[0049] S2: Wind the coil 1 on the insulating cylinder 2, and stop winding when the distance between the coil 1 and the top of the spacer 211 is 12 mm;

[0050] S3: wrap the insulating paper tape 3 half-stacked on the free end of the block group 21 in an interlaced manner, and wind the insulating paper tape 3 with a winding thickness of 0.1 mm;

[0051] S4: Winding the glass ribbon 4 outside the insulating paper tape 3, the thickness of the glass ribbon 4 being wound is 0.05 mm;

[0052] S5: Drying the coils processed in step S4;

[0053] S6: Then, under vacuum pressure, dip the coil treated in step S5 in the environmental protection paint, put it into a curing furnace for curing, set the temperature of the curing furnace at 160° C., let it cool and then take it ou...

Embodiment 3

[0055] A method for preparing a protective structure for a transformer coil mainly includes the following steps:

[0056] S1: Insert 400 spacers 211 on the T-shaped stays 22 according to the height of the coil 1;

[0057] S2: Wind the coil 1 on the insulating cylinder 2, and stop winding when the distance between the coil 1 and the top of the spacer 211 is 15 mm;

[0058] S3: wrapping the insulating paper tape 3 half-stacked on the free end of the block group 21 in an interlaced manner, and winding the insulating paper tape 3 with a thickness of 0.5 mm;

[0059] S4: Winding the glass ribbon 4 outside the insulating paper tape 3, the thickness of the glass ribbon 4 being wound is 0.15 mm;

[0060] S5: Drying the coils processed in step S4;

[0061] S6: Then, under vacuum pressure, dip the coil treated in step S5 in the environmental protection paint, put it into a curing furnace for curing, set the temperature of the curing furnace at 190° C., let it cool and then take it out...

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Abstract

The invention discloses a transformer coil protection structure. The protection structure comprises a coil, an insulating cylinder, an insulating paper tape and a glass tape, the coil is wound on theinsulating cylinder; a plurality of T-shaped stays are arranged on the insulating cylinder, and cushion block groups are detachably and fixedly arranged on the T-shaped stays. The insulation paper tape covers the free ends of the cushion block groups and is wound, and an interval space is formed between the insulation paper tape and the wire; and the glass tape is wound on the outer side of the insulating paper tape. The T-shaped stays and the cushion block groups are arranged on the insulating cylinder; the insulation paper tape and the glass tape are wound on the cushion block groups, the mechanical strength of the transformer coil is improved and enhanced, the risk that the transformer is damaged by external force in the transportation and installation process is reduced, meanwhile, theinsulation effect is enhanced, a phase-to-phase partition plate is omitted, and dust and foreign matter can be further prevented from entering the coil.

Description

technical field [0001] The invention relates to the technical field of transformers, in particular to a protective structure for transformer coils and a preparation method thereof. Background technique [0002] Transformer is a device that uses the principle of electromagnetic induction to change AC voltage. The main components include primary coil, secondary coil and iron core. The main functions are: voltage conversion, current conversion, impedance conversion, isolation and voltage stabilization, etc., which can be divided into For: power transformers and special transformers (electric furnace transformers, rectifier transformers, power frequency test transformers, voltage regulators, mining transformers, audio transformers, intermediate frequency transformers, high frequency transformers, impact transformers, instrument transformers, electronic transformers, reactors and Transformers, etc.). Transformers are used as electrical equipment in large power plants or substati...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): H01F27/30H01F27/32H01F27/28
CPCH01F27/306H01F27/325H01F27/2876
Inventor 邓勇军李忠华
Owner CHONGQING YUANTONG ELECTRICAL APPLIANCE EQUIP MFG CO LTD