Transformer copper pipe lead with internal cooling structure

Abstract

The invention discloses a transformer copper pipe lead with an internal cooling structure. The transformer copper pipe lead comprises lead joints which are fixed at two ends of the copper pipe lead, and crepe paper which is bound in the middle of the copper pipe lead, wherein the copper pipe lead adopts the internal cooling structure; cooling oil circularly flows in the copper pipe lead; a plurality of oil inlet and outlet groove openings are respectively formed at the two ends of the copper pipe lead; binding tapes and the crepe paper are sequentially bound at the two ends of the copper pipe lead and outside the lead joints from inside to outside; a plurality of insulating cylinders are sleeved outside the crepe paper; and a plurality of supporting strips are arranged between the crepe paper and the insulating cylinders and between the two adjacent insulating cylinders. The transformer copper pipe lead has the advantages of simple structure, convenience for operation and good cooling effect, the operation reliability of a transformer is improved, the sectional area of a transformer lead can be reduced, the consumption of raw materials is reduced, the temperature of the oil can rise by the lead, and the design of a high-voltage and high-capacity transformer lead is facilitated.

Description

technical field [0001] The invention belongs to a transformer high-voltage lead wire and relates to a transformer copper tube lead wire with internal cooling. Background technique [0002] At this stage, the high-voltage leads of 110kV and above high-current transformers are covered with too thick insulation to ensure electrical performance. In this case, the copper tube has poor heat dissipation effect under the same cross-section. It is not easy to guarantee the temperature rise of the copper tube of the transformer to the oil; in order to meet the temperature rise requirement, the effective cross-sectional area of ​​the copper tube needs to be increased to reduce the current density, which results in increased material consumption, increased skin effect and reduced effective insulation distance. Contents of the invention [0003] In order to make up for the deficiencies of the prior art, the present invention provides a transformer copper tube lead wire with...

AI Technical Summary

Problems solved by technology

[0002] At this stage, the high-voltage leads of 110kV and above high-current transformers are covered with too thick insulation to ensure electrical performance. In this case, the copper tube has poor heat dissipation effect under the same cross-section. It is not easy to ensure the temperature rise of the copper tube of the transformer to the oil; in order to meet the temperature rise requirement, it is necessary to increase the effective cross-sectional area of ​​the copper tube and reduce the current density, which results in increased material consumption, increased skin effect and reduced effective insulation distance

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