Water-Cooled Shield Assembly for Plasma Torch Consumable Heat Control

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Solution Overview

Problem

Plasma cutting torches experience premature failure and poor cut quality when cutting heavy materials due to exposure to high heat, leading to costly repairs and reduced productivity.

Innovation Solution

An outer shield assembly, or 'shield club,' is used to absorb and dissipate heat from the cutting torch, with a cooling fluid flowing between the shield and consumable components, and a deflector ring to increase heat dissipation and protect against spatter.

Engineering Contradictions & Design Principles

VSEngineering Contradiction Analysis

1Power

If plasma cutting torch is used to cut heavy materials, then cutting capability is improved, but consumable lifespan deteriorates due to high heat exposure

Engineering Contradiction:

Improvecutting capabilityVSAvoidconsumable lifespan

Core Design Contradiction:

PowerVSDuration of action of stationary object

Solution Approach 1:

A water-cooled shield assembly is introduced as an intermediary component between the plasma arc and the consumables. The shield absorbs and dissipates heat through water cooling channels, protecting the consumables from direct high heat exposure while allowing the plasma cutting operation to continue at high power levels

Inventive Principle:

Principle #24Intermediary (Mediator)

Solution Approach 2:

The high heat that previously caused consumable damage is redirected and utilized to heat the water in the cooling channels, converting the harmful thermal energy into a useful cooling mechanism that protects the consumables and extends their operational life

Inventive Principle:

Principle #22Blessing in disguise (Convert harm into benefit)

2Power

If plasma cutting torch is used to cut heavy materials, then cutting capability is improved, but productivity deteriorates due to frequent consumable replacement

Engineering Contradiction:

Improvecutting capabilityVSAvoidproductivity

Core Design Contradiction:

PowerVSProductivity

Solution Approach 1:

The water-cooled shield assembly serves as a protective intermediary that extends consumable life, reducing the frequency of replacements and maintaining continuous high-power cutting operations, thereby improving overall productivity

Inventive Principle:

Principle #24Intermediary (Mediator)

Solution Approach 2:

The shield assembly pre-cools the consumables and dissipates heat before it can cause damage, allowing consumables to withstand extended high-power operation without premature failure, thus maintaining productivity

Inventive Principle:

Principle #10Preliminary action

3Device complexity

If conventional shield design is used, then device simplicity is maintained, but heat dissipation capability deteriorates

Engineering Contradiction:

Improvedevice simplicityVSAvoidheat dissipation capability

Core Design Contradiction:

Device complexityVSTemperature

Solution Approach 1:

A water cooling system with channels and flow paths is integrated into the shield assembly, using hydraulic principles to circulate cooling water that absorbs and removes heat from the consumables, significantly enhancing heat dissipation capability

Inventive Principle:

Principle #29Pneumatics and hydraulics

Solution Approach 2:

The shield assembly combines different materials and structures - including water-cooled channels, heat-conductive materials, and protective barriers - to create a composite structure that efficiently manages heat while maintaining operational simplicity

Inventive Principle:

Principle #40Composite materials

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 extends the lifespan of consumable components, improves cut quality, and reduces the need for frequent replacements by effectively managing heat during high-amp plasma cutting operations.

Implementation Method 1

an outer shield assembly (also called a 'shield club,' secondary shield, secondary shield assembly, or the like) absorbs and dissipates heat from a cutting torch

Methodology Applied

Scientific EffectHeat dissipation: Convection

Implementation Method 2

a flow of cooling water flows between and cools the outermost consumable(s) and the outer shield

Methodology Applied

Scientific EffectThermal conduction: Conduction (thermal)

Implementation Method 3

a flow of cooling water flows between and cools the outermost consumable(s) and the outer shield

Methodology Applied

Scientific EffectHeat transfer: Conduction (thermal)

Implementation Method 4

the outer shield includes a deflector ring for deflecting spatter ejected during a plasma cutting operation

Methodology Applied

Scientific EffectParticle deflection: Reflection

Data Source

PatentUS20230413412A1Consumables for plasma cutting torch

Publication Date: 2023.12.21 ESAB GROUP INC

AI summary

The present invention relates to techniques for absorbing and dissipating heat from a cutting torch during a plasma cutting process/operation, including a piercing stage. In accordance with at least one embodiment of the present invention, an outer shield club with a deflector ring absorbs and dissipates heat from a cutting torch including consumable components disposed therein. The shield club surrounds and protects the outermost consumable (e.g., nozzle/tip, shield, etc.) and dissipates heat from the plasma cutting operation. In some implementations, a flow of cooling water flows between and cools the outermost consumable and the shield club.