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Repair method for corroded steel structure parts in transformer substation

A repair method and technology for steel structural parts, which are applied in the field of substation maintenance, can solve the problems of difficult handling, long processing time of the repair method, cumbersome and inconvenient operation, etc.

Inactive Publication Date: 2019-04-02
GUANGZHOU POWER SUPPLY CO LTD
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0004] The existing repair method for steel structural parts after corrosion requires a large number of grinding and rust removal processes throughout the repair process, which consumes a lot of time, manpower and material resources, making the operation extremely cumbersome and inconvenient
And many corner areas are not easy to handle, which will affect the subsequent painting
The time required for the final painting stage is also 1-2 days, making the processing time of the whole restoration method longer
During the repair period, the power outage of the substation is required to cooperate with the construction. If the power outage lasts too long, it will increase the difficulty of dispatching by the power department

Method used

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  • Repair method for corroded steel structure parts in transformer substation

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Effect test

Embodiment 1

[0045] The repair method for corroded steel structural parts in substations, that is, the quick repair plan for large-area corroded steel structural parts in substations, the specific steps are as follows:

[0046] (1) Use dry ice sandblasting, adjust the pressure to 0.4MPa, and the airflow to 0.35 cubic meters per minute, and quickly peel off the primer, topcoat and corrosion products on the corrosion position on the surface of the steel structure.

[0047] (2) Use quick-drying zinc-rich epoxy to paint the cleaned substrate, and use the spraying method, the spraying pressure is 0.2MPa, and the thickness of the primer layer is controlled at 30μm.

[0048] (3) After the treatment in step (2) for 30 minutes, use two-component polyurethane paint to coat the structural parts with a spraying method, the spraying pressure is 0.2MPa, and the thickness is controlled at about 50μm.

[0049] The repair time of the repair method for corroded steel structural parts in the entire substatio...

Embodiment 2

[0051] The repair method of corroded steel structural parts in the substation, that is, the quick repair plan for the steel structural parts with a large area of ​​paint peeling off in the substation, the specific steps are as follows:

[0052] (1) The peeling of the paint layer is mainly the peeling of the topcoat. Use dry ice sandblasting, adjust the pressure to 0.4MPa, and the airflow to 0.3 cubic meters per minute. Quickly peel off the finish paint on the surface of the steel structure.

[0053] (2) Use quick-drying zinc-rich epoxy to paint the cleaned substrate, and use spraying method, the spraying pressure is 0.6MPa, and the thickness is controlled at about 30μm.

[0054] (3) After the treatment in step (2) for 30 minutes, use two-component polyurethane paint to coat the structural parts with a spraying method, the spraying pressure is 0.5MPa, and the thickness is controlled at about 50μm.

[0055] The repair time of the repair method for corroded steel structural par...

Embodiment 3

[0057] The repair method for corroded steel structural parts in substations, that is, the rapid repair plan for large-area corroded steel structural parts in substations, the specific steps are as follows: (1) Use dry ice sandblasting, adjust the pressure to 0.8MPa, and the airflow to 0.6 cubic meters per minute. Quickly strip the primer, topcoat and corrosion products on the corrosion site on the surface of the steel structure.

[0058] (2) Use quick-drying zinc-rich epoxy to paint the cleaned substrate, and use spraying method, the spraying pressure is 0.7MPa, and the thickness is controlled at about 45μm.

[0059] (3) After the treatment in step (2) for 30 minutes, use epoxy zinc-rich paint to coat the structural parts with a spraying method, the spraying pressure is 0.5MPa, and the thickness is controlled at about 45μm. The finish color is gray.

[0060] The repair time of the repair method for corroded steel structural parts in the entire substation is only 5 hours.

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Abstract

The invention relates to a repair method for corroded steel structure parts in a transformer substation. The repair method comprises the following steps that dry ice is adopted to spray corroded positions of the corroded steel structure parts; quick-drying paint is used for spraying the corroded positions, and quick-drying paint coatings are formed at the corroded positions of the corroded steel structure parts; and finish paint is applied to the quick-drying paint coatings to form finish paint layers. According to the repairing method for the corroded steel structure parts in the transformersubstation, by adopting the dry ice to spray the corrode positions of the steel structure parts, corrosion products can be quickly removed, and a plurality of paint layers which affect the binding force of the subsequent quick-drying paint coatings can further be removed; moreover, rust layers in certain corner areas of corroded steel can be better removed by adopting dry ice spraying, so that a large amount of manpower and material resources can be saved, and cleaning work of the rust layers becomes simple and quick. The quick-drying paint coatings are formed by spraying the quick-drying paint at the corroded positions of the corroded steel structure parts after the dry ice is sprayed at the corroded positions, so that the time for forming the quick-drying paint coatings is shorter, and thus the overall repair time can be shortened.

Description

technical field [0001] The invention relates to the technical field of substation maintenance, in particular to a method for repairing corroded steel structural parts in a substation. Background technique [0002] A substation is a place in a power system that transforms voltage and current, receives electric energy and distributes electric energy. The indoor and outdoor facilities of the substation include main transformers, a large number of brackets and boxes, etc. Most of these structures use a large number of steel structural parts. Since a large number of these steel structural parts are used outdoors, the steel structural parts are extremely easy to be corroded. At present, the steel used in steel structure parts in power transmission and transformation projects can be mainly divided into low-alloy high-strength structural steel and hot-rolled low-carbon steel. If the anti-corrosion measures of these two kinds of steel materials are insufficient, corrosion reactions...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): B24C1/08B05D5/00B05D3/00B05D7/16
CPCB24C1/086B05D3/002B05D5/005B05D7/16B05D7/54
Inventor 李晨涛林李波蔡蒂孔纲赖德林车淳山王文君杜兆斌宁军
Owner GUANGZHOU POWER SUPPLY CO LTD
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