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
4 Cites 11 Cited by

AI-Extracted 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 in...
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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.

Application Domain

Technology Topic

Leakage ratePlastic film +7

Image

  • 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(2)

Example Embodiment

[0017] Example 1:
[0018] The thickness of the plastic layer is 0.2mm, the diameter of the cylindrical plastic body is 2mm, the height is 5mm, the spacing between each cylindrical plastic body is 20mm, and the thickness of the plastic film is 0.05mm. According to the shape of the tested part, the size of the plastic layer is cut, and the shape corresponding to the tested part is spliced ​​together. Then the plastic film is pasted on the flat side of the plastic layer through double-sided tape to form a whole, and the overall surface area of ​​the plastic layer is calculated. Place the cylindrical plastic body of the plastic layer toward the component to be tested, and the top of each cylindrical plastic body is in close contact with the component to be tested. The plastic layer wraps the component to be tested, and the wrapping seam is sealed with tape. Calculate the volume of the package cavity based on the overall surface area of ​​the plastic layer and the height of the cylindrical plastic body, and subtract the volume of all cylindrical plastic bodies in the cavity from this volume to obtain the volume of gas in the package cavity. After the wrapping cavity is closed, the wrapping layer is pierced after a specific time interval, and the gas in the wrapping cavity is tested for the concentration of sulfur hexafluoride gas. The above-mentioned partial wrapping leak detection on each sealing surface of the SF6 gas chamber can accurately calculate the relative annual leakage rate of the gas chamber.

Example Embodiment

[0019] Example 2:
[0020] The thickness of the plastic layer is 0.5mm, the diameter of the cylindrical plastic body is 5mm, the height is 20mm, the spacing between each cylindrical plastic body is 50mm, and the thickness of the plastic film is 0.2mm. According to the shape of the tested part, the size of the plastic layer is cut, and the shape corresponding to the tested part is spliced ​​together. Then the plastic film is pasted on the flat side of the plastic layer with double-sided tape to form a whole, and the overall surface area of ​​the plastic layer is calculated. Place the cylindrical plastic body of the plastic layer toward the component to be tested, and the top of each cylindrical plastic body is in close contact with the component to be tested. The plastic layer wraps the component to be tested, and the wrapping seam is sealed with tape. Calculate the volume of the package cavity based on the overall surface area of ​​the plastic layer and the height of the cylindrical plastic body, and subtract the volume of all cylindrical plastic bodies in the cavity from this volume to obtain the volume of gas in the package cavity. After the wrapping cavity is closed, the wrapping layer is pierced after a specific time interval, and the gas in the wrapping cavity is tested for the concentration of sulfur hexafluoride gas. Accurately calculate the annual air leakage rate.
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PUM

PropertyMeasurementUnit
Thickness0.2 ~ 0.5mm
Height5.0 ~ 20.0mm
Diameter2.0 ~ 5.0mm
tensileMPa
Particle sizePa
strength10

Description & Claims & Application Information

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the structure of the environmentally friendly knitted fabric provided by the present invention; figure 2 Flow chart of the yarn wrapping machine for environmentally friendly knitted fabrics and storage devices; image 3 Is the parameter map of the yarn covering machine
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