Arc Quench Chamber Tube With Orifice For Particle Evacuation
Find Innovative SolutionsGenerate Solutions
Solution Overview
Problem
High voltage circuit breakers face issues with low-intensity electric arcs causing electroerosion and friction, leading to deposition of conductive particles on insulating tubes, which alter dielectric properties and increase the risk of re-ignition, particularly in single-arcing chamber designs under high voltage levels.
Innovation Solution
Incorporating a through orifice in the insulating tube to evacuate electrically conductive particles, with a design that enhances the electric field gradient to attract and remove particles, combined with a particle trap to capture any particles that pass through, thereby reducing re-ignition risks.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If a through orifice is added to the insulating tube to evacuate particles, then particle removal efficiency is improved, but the mechanical strength of the tube may be weakened
Solution Approach 1:
The insulating tube is designed with a through orifice (opening) that allows it to function as a porous structure for particle evacuation while maintaining its insulating properties. The orifice enables conductive particles to pass through from the inner space to the outer environment, solving the particle accumulation problem without compromising the tube's primary insulating function.
2Reliability
If the electric field gradient is enhanced to attract particles to the orifice, then particle evacuation is improved, but the risk of electric discharge at the orifice edges increases
Solution Approach 1:
The high electric field gradient at the orifice edges, which initially appears harmful as it could cause discharge, is actually beneficial as it creates strong electrostatic attraction forces that draw conductive particles toward the orifice. The harmful high field is converted into a useful particle collection mechanism, where the same field that could cause discharge instead serves to concentrate and remove particles efficiently.
Solution Approach 2:
The orifice acts as an intermediary structure that mediates between the high electric field environment and particle removal needs. By positioning the orifice at a specific location and designing its geometry, the system uses the electric field as a mediator to attract particles without requiring direct contact or additional mechanical removal mechanisms.
3Reliability
If a particle trap is added outside the tube to capture particles, then re-ignition risk is reduced, but the device complexity increases
Solution Approach 1:
The particle trap is positioned outside the insulating tube, extracting the particle capture function from the main tube structure. This separation allows the tube to focus on its primary insulating and centering functions while the external trap handles particle collection, reducing the complexity burden on the critical insulating component.
Solution Approach 2:
The particle trap serves as an intermediary component that captures particles after they pass through the orifice. This external trap acts as a secondary defense mechanism, catching any particles that escape the primary orifice evacuation path without interfering with the main insulating tube's operation.
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
The solution effectively reduces the risk of re-ignition by efficiently evacuating conductive particles, preserving the dielectric properties of the insulating tube and meeting mechanical strength requirements for high voltage applications.
Implementation Method 1
a design that enhances the electric field gradient to attract and remove particles
Implementation Method 2
combined with a particle trap to capture any particles that pass through
Data Source
Figure 1
Figure 2
Figure 3
AI summary
The invention relates to a cutting chamber (10) for an electrical cutting apparatus, intended for enclosing a cutting fluid, including two contact devices (12a, 12b) of which at least one can be moved in translation in a longitudinal direction (47) with respect to a frame (24) between a closed position and an open position of said devices, and including a tube (28) for electrically insulating and centering said devices (12a, 12b) with respect to each other, which tube is stationary with respect to said frame (24) and which extends longitudinally around said devices in such a manner as to delimit a space (42) in which the latter devices are accommodated, said tube (28) comprising a through hole (46) formed in a longitudinal wall of the tube and opening radially toward the outside of said tube.