Insertable High-Voltage Bushing With Composite Housing And Dry Foam Insulation
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Solution Overview
Problem
High-voltage bushings face challenges in achieving both excellent dielectric properties and mechanical stability, while also preventing environmental pollution from escaping insulating fluids.
Innovation Solution
The use of a tubular housing element made of composite materials, such as glass fiber-reinforced plastic, with secondary insulation using dry foam, and capacitive control inserts made of non-woven fabric, which provides enhanced mechanical stability and eliminates the risk of fluid leakage, along with external power contact means for secure electrical connections.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If a fluid insulating medium is used to fill the interspace between the insulating body and the housing, then dielectric properties are improved, but mechanical stability deteriorates and environmental pollution risk increases
Solution Approach 1:
The patent changes the physical state of the insulating medium from liquid to solid foam. The foam material maintains the insulating function while providing mechanical stability and eliminating leakage risks. This parameter change resolves the contradiction by transforming the medium's properties to simultaneously achieve dielectric performance and structural stability.
Solution Approach 2:
The patent uses composite foam material that combines insulating properties with mechanical strength. The foam structure provides both dielectric insulation and structural support, eliminating the need for separate fluid filling and housing reinforcement. This composite approach resolves the contradiction by integrating multiple functions into a single material system.
2Reliability
If a fluid insulating medium is used to fill the interspace between the insulating body and the housing, then dielectric properties are improved, but environmental pollution risk increases
Solution Approach 1:
The patent extracts the harmful fluid component and replaces it with a solid foam material. By removing the liquid insulating medium that could leak and pollute the environment, the invention maintains dielectric properties while eliminating the source of potential environmental contamination. This extraction principle directly addresses the pollution issue.
Solution Approach 2:
The patent changes the insulating medium from liquid to solid foam form. This parameter change eliminates the流动性 (fluidity) that causes leakage and environmental pollution, while preserving the insulating function. The solid foam structure ensures the medium remains contained and cannot escape to cause pollution.
3Object-generated harmful factors
If the housing is made robust to prevent fluid leakage, then environmental pollution is reduced, but device complexity increases
Solution Approach 1:
The patent extracts and removes the fluid insulating medium entirely, replacing it with integrated foam insulation. By eliminating the fluid component that would require sealed containment, the housing structure can be simpler while still preventing pollution. The foam is inherently contained within the insulating body structure.
Solution Approach 2:
The patent merges the insulating function and structural support function into a single foam material system. The foam serves both as dielectric insulation and as structural element, eliminating the need for complex separate housing designs. This merging of functions reduces overall device complexity while maintaining pollution prevention.
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
This configuration results in a high-voltage bushing with improved mechanical stability, reduced environmental pollution risk, and enhanced dielectric properties, capable of withstanding high voltages and currents without fluid leakage, ensuring reliable and efficient operation.
Implementation Method 1
a secondary insulation is provided between the housing element and the insulating body, which comprises a dry foam
Implementation Method 2
the housing element is formed of a composite material... The housing element is preferably comprised of a glass fiber-reinforced plastic
Data Source
AI summary
An insertable high-voltage bushing includes an inner conductor which extends in a longitudinal direction between a high-voltage terminal and a plug-in section of the high-voltage bushing. The plug-in section is configured for the insertion of the high-voltage bushing into a device connection part of an electrical device. An insulating body at least partially extends around the inner conductor. A housing at least partially extends around the outside of insulating body. The housing includes a tubular housing element which extends between a head fitting at the high-voltage terminal of the high-voltage bushing and a mounting flange for fastening the high-voltage bushing to a device housing of the electrical device. The housing element is made of a composite material and a secondary insulation provided between the housing element and the insulating body is formed of a dry foam.