Plasma torch with swirl-inducing nozzle and method of using same
US8525068B2 · kind B2 · utility
Assignee
Inventors
Key dates
| Filing date | Sep 6, 2010 |
| Grant date | Sep 3, 2013 |
| Priority date | — |
| Expiry date | Sep 6, 2030 |
Classification
- Technology area (CPC H)Electricity
- CPC primaryH05H1/3457
- WIPO fieldChemical engineering
- WIPO sectorChemistry
Abstract
A plasma torch 1 used in plasma-arc welding is provided with a rod-shaped electrode 10, a first cylindrical nozzle 11 which is provided to surround the electrode 10 and which injects a plasma gas and a second cylindrical nozzle 12 which is provided to surround the first nozzle 11 and which injects a shielding gas. A second injection opening 121 of the second nozzle 12 directs in a substantially parallel direction with respect to an axial direction of the electrode 10 or in a direction being away from the electrode 10, and a plurality of groove portions inclining with respect to the axial direction of the electrode 10 are formed in an outer circumferential surface of the first nozzle 11 or an inner circumferential surface of the second nozzle 12.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.