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Devices for gas cooling plasma arc torches and related systems and methods

A plasma arc and gas cooling technology, applied in plasma, electrode clip cooling, electrode support devices, etc., can solve problems such as easy spillage and increased equipment costs

Active Publication Date: 2015-09-16
HYPERTHERM INC
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

External cooling systems may increase associated equipment costs, may require more maintenance, may be spillable, and in some cases may require disposal of cooling media

Method used

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  • Devices for gas cooling plasma arc torches and related systems and methods
  • Devices for gas cooling plasma arc torches and related systems and methods
  • Devices for gas cooling plasma arc torches and related systems and methods

Examples

Experimental program
Comparison scheme
Effect test

Embodiment Construction

[0085] figure 1 An example plasma torch 50 is shown that may be used with various aspects and embodiments of the plasma arc torch cooling systems, apparatus, and methods described herein. refer to figure 1 , the plasma torch 50 may include an electrode 60 , a nozzle 100 and a shield 150 . The torch 50 may be in electrical communication (eg, using a current carrying cable (not shown)) with a power source (not shown) and receive electrical current from the power source. The current received from the power source is transferred to the electrode 60 towards the nozzle 100 through the current path.

[0086] In use, a gas (eg, plasma gas) is directed to a plasma boost chamber 80 defined between the electrode 60 and the nozzle 100 . The plasma gas may be accelerated within plasma booster chamber 80 (e.g., the plasma gas may be heated, which reduces the density of the gas and increases its volume and velocity as the plasma is formed) to pass through the electrodes 60 and The plas...

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PUM

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Abstract

In some aspects, nozzles for plasma torches can include a nozzle body having a proximal end and a distal end that define a nozzle body length and a longitudinal axis. The body can include an exit orifice defined by the distal end; a plenum extending from the proximal end to a plenum floor, a distance from the plenum floor to the distal end defining a plenum floor thickness, and a distance from the plenum floor to the proximal end defining a proximal end height; and a bore extending from the plenum floor to the exit orifice that has a bore length and a bore width. The nozzle body has a nozzle width in a direction transverse to the longitudinal axis. The nozzle body length is greater than the width and a ratio of the proximal end height to the plenum floor thickness is less than 2.0.

Description

technical field [0001] The present invention relates generally to thermal cutting torches (eg, plasma arc torches), and more particularly to apparatus and related systems and methods for gas cooled plasma arc torches. Background technique [0002] The basic components of a modern conventional plasma arc torch include the torch body, an electrode (e.g. cathode) mounted within the body, a nozzle with a central hole (e.g. anode), associated electrical connections and cooling passages, and an arc control fluid, The nozzle can produce a pilot arc to the electrodes to ignite a plasma arc in a flow of a suitable gas (eg, air, nitrogen or oxygen). The pilot arc can be produced by a high frequency high voltage signal coupled to a DC power supply and plasma arc torch or any of a variety of contact start methods. In some constructions, a shield is mounted to the torch body to prevent metal (sometimes referred to as slag) spattered from the workpiece during processing from accumulating...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): H05H1/28H05H1/34
CPCH05H2001/3457B23K9/285H05H1/28H05H1/34H05H1/3457H05H1/3405
Inventor 张瑜段正理查德·R·格蕾丽萨·纳多
Owner HYPERTHERM INC