Graphite Plasma Torch Nozzle Bolted to Electrode
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Solution Overview
Problem
Conventional plasma torch nozzles made of oxygen-free copper are prone to erosion due to high temperature arc heat, leading to reduced heat efficiency, short lifespan, and high operational costs, with water cooling further reducing efficiency and causing uncertainty in plasma behavior.
Innovation Solution
A plasma torch nozzle made of graphite material is fixedly coupled to the front electrode using bolts, allowing for periodic replacement and eliminating the need for a cooling channel.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If water cooling is applied to the OPC material torch electrode, then the erosion rate is reduced, but the heat efficiency deteriorates
Solution Approach 1:
The invention extracts and removes the water cooling channel structure from the torch electrode design. By eliminating the cooling channel, the patent avoids the heat loss associated with water cooling while still managing erosion through the use of consumable graphite nozzle tips that can be periodically replaced, thus resolving the contradiction between erosion resistance and heat efficiency.
Solution Approach 2:
The patent changes the material parameter from OPC (oxygen-free copper) to graphite for the nozzle tip, and changes the operational parameter from continuous water-cooled operation to periodic replacement of consumable tips. This parameter change allows the system to maintain erosion resistance through material selection and operational strategy rather than through active cooling, thereby preserving heat efficiency.
2Ease of operation
If OPC material is used for the torch electrode, then arc ignition is easy, but the erosion due to high temperature arc heat is fast
Solution Approach 1:
The patent segments the torch electrode into two functional parts: a permanent OPC body that provides easy arc ignition and electrical conductivity, and a separate consumable graphite nozzle tip that withstands erosion. This segmentation allows each component to fulfill its optimal function - the OPC ensures easy ignition while the graphite tip provides extended service life by resisting erosion and being replaceable.
Solution Approach 2:
The patent creates a composite structure combining OPC material for the main electrode body with graphite material for the nozzle tip. This composite approach leverages the advantageous properties of both materials - OPC's electrical conductivity and arc ignition characteristics, and graphite's high temperature resistance and erosion resistance - thereby resolving the contradiction between ease of operation and service life.
3Ease of manufacture
If OPC material is used for the torch electrode, then the electrode can be easily processed, but the price is expensive and processing is difficult
Solution Approach 1:
The patent divides the nozzle into a simple OPC body and a separate graphite tip component. The OPC body remains simple to manufacture, while the graphite tip is manufactured separately and attached. This segmentation maintains ease of manufacture for the main structure while allowing specialized materials to be used only where necessary, avoiding the complexity of processing expensive OPC throughout the entire nozzle.
Solution Approach 2:
The patent adopts a disposable consumable tip approach where the graphite nozzle tip is designed to be replaced periodically rather than permanently installed. This allows the use of less expensive materials for the disposable component while maintaining performance where it matters, reducing overall device complexity and cost compared to using expensive OPC material throughout the entire nozzle structure.
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 solution enhances heat efficiency, operational stability, and economic feasibility by enabling cost-effective replacement of the graphite nozzle, improving the overall efficiency and competitiveness of the plasma torch system.
Implementation Method 1
the nozzle of consumable graphite material in this invention can be periodically replaceable after use for short period without further cooling
Implementation Method 2
the plasma torch nozzle according to this invention is characterized by that the torch nozzle is fixedly coupled to the front electrode of the plasma torch by one or more bolts 11
Data Source
AI summary
The present invention is to solve the problems described above and to provide the plasma torch nozzle of graphite material coupled to the front electrode of the plasma torch by bolts.To achieve the object of the invention, the plasma torch nozzle according to this invention is characterized by that the torch nozzle is fixedly coupled to the front electrode of the plasma torch by one or more bolts.