Pipeline section of a gas-insulated pipeline
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United States of America Patent
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-
Mar 6, 2001
Grant Date -
N/A
app pub date -
May 14, 1999
filing date -
May 15, 1998
priority date (Note) -
Expired
status (Latency Note)
Importance
Abstract
The pipeline section of the gas-insulated pipeline has an insulating gas-filled encapsulation including a polymer pipe. A current conductor is arranged inside the capsule pipe and extends parallel to the latter's axis and is supplied with a high voltage. This current conductor is retained by insulators that rest on the inside surface of the capsule pipe. At least one of a plurality of post insulators has a support ring resting on the mantle surface of the current conductor. At least three evenly distributed and hollow support elements are molded peripherally in a star shape on the support ring, each of which has transversely to a longitudinal axis a profile that is constructed in the shape of an arch or trapezoid. The support elements each have a shell-shaped foot. Each shell-shaped foot has a thickness (d) which is smaller than a distance (a) between the current conductor and the inside surface of the capsule pipe and smaller than a length (l) in an axial direction of the capsule pipe. At least two of the feet rest on the inside surface of the capsule pipe. This keeps the electric field strength in the gaps between the post insulators and the inside surface of the polymer capsule pipe at a minimum and thus optimizes the di-electric stability of the pipeline section.
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