Plasma Cutting Torch Cooling Chamber Segmentation
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Solution Overview
Problem
Prior art plasma torches experience excessive wear and damage to the second, cup-shaped member of the covering unit due to high temperatures and molten material adherence, leading to reduced operational life and increased maintenance needs.
Innovation Solution
A plasma cutting torch design that incorporates multiple cooling fluids and a second unit with notches to enhance cooling and protect the second member from molten material, allowing for improved heat exchange and reduced wear.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Power
If the second, cup-shaped member of the covering unit is used in high-amp plasma torches, then the plasma arc can be discharged through the torch, but the member is subjected to excessive wear and damage due to high temperatures and molten material adherence
Solution Approach 1:
The covering unit is divided into two separate members: a first substantially cylindrical member and a second cup-shaped member. This segmentation allows the second member to be specifically optimized for protecting against molten material while the first member handles the primary structural and cooling functions, thereby improving the reliability of the second member under high power conditions.
Solution Approach 2:
A secondary cooling fluid is introduced as an intermediary substance between the plasma arc and the second covering member. This fluid flows through a channel formed by the first member and the nozzle holder, creating a protective barrier that reduces thermal exposure and prevents molten material from adhering to the second member, thus enhancing its reliability.
2Productivity
If the second, cup-shaped member is exposed to high temperatures and molten material, then the plasma cutting function is maintained, but the working life of the member is significantly reduced
Solution Approach 1:
The secondary cooling fluid is supplied in advance through the channel formed by the first member and nozzle holder, creating a protective environment before molten material can reach the second covering member. This preliminary cooling action prevents thermal damage and material adherence, extending the working life of the second member while maintaining continuous productivity.
Solution Approach 2:
A hydraulic system is implemented to supply the secondary cooling fluid through the channel formed by the first member and nozzle holder. This fluid delivery system actively manages heat removal and protects the second covering member from molten material exposure, thereby extending its operational lifespan without interrupting the plasma cutting process.
3Device complexity
If a single cooling fluid is used in the cooling chamber, then the structure is simple, but the second member is not adequately protected from heat and molten material
Solution Approach 1:
The cooling system is segmented into two separate cooling fluid paths: a primary cooling fluid flowing through the cooling chamber, and a secondary cooling fluid flowing through the channel formed by the first member and nozzle holder. This segmentation allows each fluid to perform specific protective functions, effectively reducing heat and molten material exposure to the second member without excessive structural complexity.
Solution Approach 2:
Different cooling qualities are applied to different areas: the primary cooling fluid addresses general thermal management in the cooling chamber, while the secondary cooling fluid provides localized protection to the second covering member by flowing through the channel near the plasma arc. This local differentiation effectively counters heat and molten material exposure where most critical.
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 design significantly extends the operational life of the second member by effectively cooling and protecting it from damage, reducing the need for frequent replacements and enhancing productivity.
Implementation Method 1
a cooling chamber formed by the inside wall of the torch body facing the outside wall of the nozzle and the outside wall of the electrode, with a cooling fluid circulating through the chamber
Implementation Method 2
a cooling fluid circulating through the chamber
Implementation Method 3
on high-amp torches where the plasma arc causes very high temperatures to be reached
Implementation Method 4
the plasma arc causes very high temperatures to be reached
Implementation Method 5
designed to enable a second cooling fluid to flow through the channel in order to cool the first member
Implementation Method 6
a second cooling fluid to flow through the channel
Data Source
Figure 1
Figure 2
Figure 3~4
AI summary
A plasma cutting torch (1) consists of a torch body (2) comprising: an electrode (3) mounted in the torch body (2); a nozzle (4), mounted on the proximal end of the torch body (2) to form a chamber (5) into which a first fluid (F1) is fed in order to generate plasma, and having a first central through hole (6) for the passage of the plasma; a nozzle holder or support (7) whose inside wall faces the outside wall of the nozzle (4) in such a way as to form a cooling chamber (8) through which a second cooling fluid (F2) passes; a first nozzle (4) and nozzle holder (7) covering unit (10) joined to the torch body (2); the proximal end of the first unit (10) is provided with a second central hole (11) for the passage of the plasma; a first channel (12), formed by the first unit (10) and the nozzle holder (7), for the passage of a third fluid (F3); and a second unit (13) for partly covering the first unit (10), joined to the torch body (2) and designed to form, together with the outside surface of the first unit (10) facing the second unit (13), a second channel (14) for the passage of a fourth fluid (F4) leading in the direction of the second hole (11).