Dielectric Cleaning Lance for Energized Medium-Voltage Equipment
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Solution Overview
Problem
Existing cleaning methods for medium-voltage power devices require shutdown and disconnection, which is not feasible for continuous operation, and existing fluid-based methods are unsuitable for electrical installations.
Innovation Solution
A lance for a cleaning kit made of dielectric materials with an external and internal assembly, utilizing gas flow channels and a mechanical filter to clean energized power devices without shutdown, using a gas flow system that includes anti-frosting and cleaning gas channels to prevent thermal bridges and frosting.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If fluid-based cleaning methods are used, then cleaning effectiveness is improved, but suitability for electrical power installations deteriorates due to safety concerns
Solution Approach 1:
The patent replaces fluid-based cleaning with gas-based cleaning (typically nitrogen or compressed air). The cleaning mechanism uses high-velocity gas jets to remove contaminants through impact and shear forces, eliminating the conductive medium (fluid) that posed safety risks to electrical equipment while maintaining effective cleaning capability.
Solution Approach 2:
The patent employs inert or non-conductive gases (such as nitrogen) as the cleaning medium. These gases do not conduct electricity and are safe for use around energized electrical equipment, thereby eliminating the safety hazards associated with fluid-based cleaning methods while preserving cleaning effectiveness through controlled gas flow and pressure.
2Ease of operation
If power devices are shut down for cleaning, then cleaning access is improved, but operational continuity deteriorates
Solution Approach 1:
The patent enables cleaning operations to be performed on energized equipment without shutdown. The gas-based cleaning system can be applied to live electrical components, allowing maintenance and cleaning to occur during normal operation, thereby maintaining continuous productivity while providing adequate cleaning access through the use of extended nozzles and targeted gas jet application.
3Object-affected harmful factors
If gas flow channels are used for cleaning, then safety for energized devices is improved, but thermal bridge formation worsens due to potential heat transfer
Solution Approach 1:
The patent uses inert gases (typically nitrogen) as the cleaning medium. These gases are non-conductive and safe for use around energized equipment. The gas flow channels are designed to deliver the cleaning gas directly to contamination areas, and the inert nature of the gas prevents thermal bridging while maintaining electrical safety.
4Object-affected harmful factors
If anti-frosting gas flow is applied, then frosting prevention is improved, but gas consumption increases
Solution Approach 1:
The patent combines the cleaning function and anti-frosting function into a single integrated gas flow system. The same inert gas flow that performs cleaning also provides thermal insulation to prevent frosting on external surfaces. By merging these two functions, the system prevents frosting without requiring additional gas consumption dedicated solely to heating or insulation.
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
Enables effective cleaning of medium-voltage power devices under operational conditions without interference, ensuring continuous functionality and preventing frosting through forced gas flow and mechanical filtration.
Implementation Method 1
an openwork baffle is fixed transversely, which acts as a mechanical filter to retain impurities from the gas flowing from the cleaning gas connection
Implementation Method 2
The use of forced gas flow reduces the formation of thermal bridges and, as a result, eliminates frosting
Data Source
AI summary
The invention solves the problem of the construction of a lance of a cleaning kit for medium-voltage power devices. The lance is equipped with an external assembly (A) and an internal assembly (B) placed therein, wherein the external assembly (A) constitutes a head (1) with clamps (2) and (3) of connections, mounted in it from the front, and connected to a body (4). The body (4) is detachably connected to an extension (5), which at the opposite end is detachably connected to a dispensing nozzle (6).