GAS CONTROL SYSTEM FOR A PLASMA ARC TORCH

摘要

A plasma arc torch is provided that includes a torch head, a pre-flow gas conduit for directing a pre-flow gas through the plasma arc torch, at least one plasma gas conduit for directing a plasma gas through the plasma arc torch, and a gas control device. The pre-flow gas conduit and the plasma gas conduit extend into a proximal end portion of the torch head. The gas control device is disposed proximate the torch head and extends between a distal end portion of the pre-flow gas conduit and a distal end portion of the plasma gas conduit. The gas control device is operatively connected to each of the pre-flow gas conduit and the plasma gas conduit. The gas control device selectively allows one of the pilot gas and the plasma gas to flow through the plasma arc torch.

主权项

1. A plasma arc torch comprising:
a torch head having a proximal end portion and a distal end portion; a pre-flow gas conduit for directing a pre-flow gas through the plasma arc torch and extending into the proximal end portion of the torch head, the pre-flow gas conduit defining a distal end portion; at least one plasma gas conduit for directing a plasma gas through the plasma arc torch and extending into the proximal end portion of the torch head, the plasma gas conduit defining a distal end portion; and a gas control device disposed proximate the torch head and extending between the distal end portion of the pre-flow gas conduit and the distal end portion of the plasma gas conduit, the gas control device being operatively connected to each of the pre-flow gas conduit and the plasma gas conduit, wherein the gas control device selectively allows one of the pilot gas and the plasma gas to flow through the plasma arc torch.