Water-vapor plasma torch, and wear-detection and process-control method to be used with such a water-vapor plasma torch
US8455785B2 · kind B2 · utility
Assignee
Inventors
Key dates
| Filing date | Sep 14, 2007 |
| Grant date | Jun 4, 2013 |
| Priority date | — |
| Expiry date | Oct 25, 2030 |
Classification
- Technology area (CPC H)Electricity
- CPC primaryH05H1/3494
- WIPO fieldChemical engineering
- WIPO sectorChemistry
Abstract
The invention relates to a water-vapor plasma torch (7) for cutting a workpiece (21), comprising a feed line (8) for a liquid (9), a heating device (22), and an evaporator (23) for forming a gas (20) from the liquid (9), a cathode (24) detachably connected to a movably mounted piston rod (25), and a nozzle (26) with an outlet opening (27) for the gas (20), as well as to a wear-detection and process-control method to be used with such a water-vapor plasma torch (7). To create such a water-vapor plasma torch (7) including wearing-part detection, at least one temperature sensor (28) is arranged within the piston rod (25), said temperature sensor being connected to a control unit (4), so that a wear of the cathode (24) and the nozzle (26) can be concluded from the temperature values detected, and that the control of the water-vapor plasma cutting process is influenceable.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.