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Binding film for leakage detection of sulfur hexafluoride electric equipment

A technology of electrical equipment and sulfur hexafluoride, which is applied in the field of high-voltage switchgear detection of power systems, can solve the problems of exceeding the gas leakage rate, the leakage detection accuracy is difficult to meet the arbitration, and the annual gas leakage rate error is very large, so as to improve the practical application. performance and reliability, significant economic and social benefits, and easy and fast use

Active Publication Date: 2012-09-12
STATE GRID TIANJIN ELECTRIC POWER +1
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

According to 4.2.3 of the standard (GB / T11023-1989), local bandage and leak detection are carried out. The plastic films used are of various shapes, the geometric shapes formed by the bandage are irregular, the gap between the plastic film and the tested product is not uniform, and the bandage cavity The internal volume can only be estimated, the calculated annual air leakage rate has a large error, and the accuracy of leak detection is difficult to meet the needs of arbitration, and various power supply units and manufacturers often have disputes over whether the equipment air leakage rate exceeds the standard

Method used

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  • Binding film for leakage detection of sulfur hexafluoride electric equipment
  • Binding film for leakage detection of sulfur hexafluoride electric equipment
  • Binding film for leakage detection of sulfur hexafluoride electric equipment

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0018] The thickness of the plastic layer is selected to be 0.2 mm, the diameter of the cylindrical plastic body is 2 mm, the height is 5 mm, the distance between each cylindrical plastic body is 20 mm, and the thickness of the plastic film is 0.05 mm. According to the shape of the tested part, cut the size of the plastic layer, splice out the shape corresponding to the tested part, and then stick the plastic film on the plane side of the plastic layer with double-sided tape to form a whole, and calculate the overall surface area of ​​the plastic layer. Put the cylindrical plastic body of the plastic layer towards the tested part, the top of each cylindrical plastic body is in close contact with the tested part, the plastic layer wraps the tested part, and the wrapping seam is sealed with tape. Calculate the volume of the enveloping cavity through the overall surface area of ​​the plastic layer and the height of the cylindrical plastic body, and subtract the volume of all cylin...

Embodiment 2

[0020] The thickness of the plastic layer is selected to be 0.5 mm, the diameter of the cylindrical plastic body is 5 mm, the height is 20 mm, the distance between each cylindrical plastic body is 50 mm, and the thickness of the plastic film is 0.2 mm. According to the shape of the tested part, cut the size of the plastic layer, splice out the shape corresponding to the tested part, and then paste the plastic film on the plane side of the plastic layer with double-sided tape to form a whole, and calculate the overall surface area of ​​the plastic layer. Put the cylindrical plastic body of the plastic layer towards the tested part, the top of each cylindrical plastic body is in close contact with the tested part, the plastic layer wraps the tested part, and the wrapping seam is sealed with tape. Calculate the volume of the enveloping cavity through the overall surface area of ​​the plastic layer and the height of the cylindrical plastic body, and subtract the volume of all cylin...

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Abstract

The invention relates to a binding film for leakage detection of sulfur hexafluoride electric equipment, which comprises a plastic layer, a double-sided sticky tape and a plastic film. The binding film for leakage detection of sulfur hexafluoride electric equipment is characterized in that cylindrical plastic bodies are uniformly distributed and vertically prepared on an upper plane of the plastic layer at intervals; the double-sided sticky tape is spliced and fixedly arranged on the lower plane of the plastic layer; and the plastic film is spliced and fixed with the lower plane of the double-sided sticky tape. After the binding film provided by the invention is bound, a regular geometrical shape is formed; a clearance between the binding film and a detected part is a fixed value; and a binding cavity volume and a yearly air leakage rate of an air chamber are accurately calculated, so that the leakage condition of the air chamber is accurately judged and the unnecessary power-off overhaul caused by misjudgment and the unscheduled power outage caused by accident air leakage of the air chamber are avoided. The binding film provided by the invention has the advantages of low cost of raw materials, convenience in use and obvious economic and social benefits.

Description

technical field [0001] The invention belongs to the field of detection of high-voltage switchgears in electric power systems, and in particular relates to a leak-detection wrapping film for sulfur hexafluoride electrical equipment. Background technique [0002] The relative annual air leakage rate is one of the important technical indicators for sulfur hexafluoride gas-insulated high-voltage switchgear to leave the factory, equipment bidding and acceptance, and it is also an important standard to ensure the safe and stable operation of equipment. At present, for large-scale switchgear assembled on site, the most common method for quantitative leak detection is partial bandaging. According to 4.2.3 of the standard (GB / T11023-1989), local bandage and leak detection are carried out. The plastic films used are of various shapes, the geometric shapes formed by the bandage are irregular, the gap between the plastic film and the tested product is not uniform, and the bandage cavity...

Claims

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Application Information

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IPC IPC(8): G01M3/02
Inventor 郭军科卢立秋苏展吴东刘鸿芳李兴方琼
Owner STATE GRID TIANJIN ELECTRIC POWER
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