Gas-Sealed Support Post Insulator for Leak-Free Insulation
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Solution Overview
Problem
Existing post insulators face issues with interface problems due to solid filling, gas leakage from high-pressure gas filling, and challenging micro-water control, requiring frequent maintenance and difficult manufacturing.
Innovation Solution
A post insulator design with a hollow insulating tube sealed with gas at 0.1-0.15 MPa normal pressure, using high-purity nitrogen or sulfur hexafluoride, equipped with self-sealing valves and drying devices to prevent leakage and maintain low water vapor content, ensuring non-negative pressure and easy micro-water control.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If high-pressure nitrogen is filled in the hollow insulating tube, then the insulating performance is improved, but gas leakage occurs and regular inspection and maintenance are required
Solution Approach 1:
The patent changes the pressure parameter from high-pressure to normal-pressure gas filling. The gas inside the insulating tube is maintained at normal pressure (0.1 MPa absolute pressure), which eliminates the gas leakage problem while maintaining insulating performance. This parameter change directly resolves the contradiction between insulating performance and gas leakage.
2Reliability
If high-pressure insulating gas is filled in the hollow insulating tube, then the insulation property is enhanced, but the margin of micro-water control range is small and control is difficult
Solution Approach 1:
The patent changes the pressure parameter from high-pressure to normal-pressure gas filling. At normal pressure (0.1 MPa absolute pressure), the margin for micro-water control is significantly increased, making it easier to control during manufacturing and operation. This resolves the contradiction between insulation property and manufacturing precision.
3Strength
If solid polyurethane material is filled in the hollow insulating tube, then the mechanical strength is improved, but interface problems occur affecting electrical property
Solution Approach 1:
The patent uses gas filling (pneumatic approach) instead of solid polyurethane filling. The hollow insulating tube is filled with normal-pressure gas, which eliminates interface problems between the filling material and the insulating tube that would affect electrical properties. This resolves the contradiction between mechanical strength and electrical property reliability.
Applied Scientific Principles
This section explains which scientific principles are used to turn an abstract innovation direction into a practical engineering solution.
Function Achieved in This Case
Eliminates the need for maintenance, reduces gas leakage, and enhances micro-water control, making the insulator more reliable and cost-effective by using inert gases and self-sealing mechanisms.
Implementation Method 1
The hollow insulating tube may be made of an insulating material having a water vapor transmission rate less than 0.2 g/m2
Data Source
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AI summary
Disclosed in the present invention is a support post insulator, comprising a hollow insulating tube, an umbrella skirt that is located at the periphery of the hollow insulating tube, and an upper flange and a lower flange that are disposed on two ends of the hollow insulating tube, wherein a gas is sealed inside of the hollow insulating tube, and the absolute pressure of the gas is 0.1-0.15 MPa. Further disclosed is an insulating support post formed by the end-to-end connection of the support post insulators. The support post insulator and the insulating support post of the present invention solve an interface problem present in internal insulating solid material filling, and also solve a gas leaking problem that occurs when using high-pressure gas filling, such that the support post insulator does not need to be detected and maintained. At the same time, the margin of the micro-water control range is improved, and micro-water control and production difficulty is reduced.