A fluid introduction module for plasma system is adapted for being disposed in a plasma system and includes a rotating nozzle and a precursor supply device. The rotating nozzle includes a main flow channel, a plasma outlet located at an end of the main flow channel, a mixing flow channel that penetrates a side wall of the rotating nozzle and communicates with the main flow channel, an independent flow channel separated from the main flow channel, and a precursor independent outlet located at an end of the independent flow channel. The precursor supply device includes a fixed housing and a rotating bearing. The fixed housing is sleeved outside the rotating nozzle and includes a precursor inlet selectively communicating with either the mixing flow channel or the independent flow channel. The rotating bearing is disposed between the rotating nozzle and the fixed housing.

A thermal metal spraying apparatus for applying a metal coating to a target surface. The apparatus provides a cathode, a wire feed stock having a free end, and a wire guide that directs the free end of the wire feedstock to a position for establishing and maintaining a plasma transferred wire arc between the cathode and the free end of the wire feedstock. The wire guide maintains at least three points of contact with the wire feedstock as the wire feedstock is fed through the wire guide.

The invention relates to a plasma cutting arrangement having at least one plasma cutting torch which is formed by a torch body, an electrode and a nozzle having a nozzle bore. An outer contour AK of the plasma cutting torch is present in cross-section with respect to a longitudinal axis which is aligned perpendicular through the nozzle bore. A smallest spacing between the longitudinal axis extending through the center of the nozzle bore of the nozzle and the radially outer margin of the outer contour AK is observed in at least one axial direction and corresponds at a maximum to ¾ of the length of a largest spacing d between the central longitudinal axis extending through the center of the nozzle bore of the nozzle and the radial outer margin of the outer contour AK. A smallest spacing c can also correspond to a maximum of ⅜ of the length of a largest distance b between two points of the outer margin of the outer contour AK whose virtual straight connection line extends through the central longitudinal axis extending through the center of the nozzle bore of the nozzle.

A plasma generating device is disclosed. A plasma generating device according to an embodiment of the present invention comprises: a plasma generating module for generating plasma; and at least one plasma nozzle for externally discharging the plasma generated by the plasma generating module, wherein a rotating body is provided separately from the plasma generating module and is rotatably disposed on the outside of the plasma generating module.

A consumable set for a plasma arc torch is provided. The consumable set comprises a consumable tip including a plurality of consumable components, at least one of which includes an asymmetric feature asymmetrically disposed in the consumable tip relative to a longitudinal axis. The consumable set also includes a mounting element for coupling the consumable tip to a torch body. The mounting element is configured to axially secure the consumable tip relative to the torch body while permitting independent rotation of the consumable tip relative to the longitudinal axis during assembly. The mounting element is also configured to both axially and radially fix the consumable tip with respect to the torch body such that the asymmetric feature is locked at the specific radial orientation relative to the longitudinal axis after securement.

A thermal metal spraying apparatus for applying a metal coating to a target surface. The apparatus provides a cathode, a wire feed stock having a free end, and a wire guide that directs the free end of the wire feedstock to a position for establishing and maintaining a plasma transferred wire arc between the cathode and the free end of the wire feedstock. The wire guide maintains at least three points of contact with the wire feedstock as the wire feedstock is fed through the wire guide.

Embodiments of arc plasma cutting torches are disclosed. In one embodiment, an eccentric plasma cutting torch includes an upper portion and a lower portion. The lower portion is angled on one side along a length which results from continuously smaller cross sections of the lower portion which are biased towards a non-angled side of the torch. As a result, a central axis of an electrode of the torch, used for cutting, is biased by an offset from a central axis of the upper portion towards the non-angled side of the torch. Such an offset allows for a torch tip region of the torch to get closer into otherwise difficult-to-access portions of workpieces for cutting. Furthermore, the overall dimensions of the torch are configured such that cooling elements within the torch dissipate enough heat to keep the torch in a stable operating condition during a cutting operation.

A device for generating an atmospheric plasma beam for treating the surface of a workpiece includes a tubular housing with an axis, an inner electrode within the housing, and a nozzle assembly with a nozzle opening for discharging a plasma beam to be generated in the housing. The direction of the nozzle opening runs at an angle relative to the axis, and the nozzle assembly can be rotated about the axis. By the aforementioned device, disadvantages are at least partly eliminated and uniform treatment of the surface is achieved in that a shield surrounds the nozzle assembly, and the shield is designed to change the intensity of the interaction of the plasma beam to be generated with the surface of the workpiece depending on the rotational angle of the nozzle assembly relative to the axis. Also provided are a system and method for treating the surface of a workpiece.

The present invention discloses a medical therapeutic apparatus (100) which generates plasma and blows out an reactive gas generated by the generated plasma toward a target object from an outlet, wherein a temperature of the reactive gas at a target surface positioned at a distance of 1 mm or more and 10 mm or less from the outlet is 40 C. or less, and a radical concentration is 0.1 to 300 mol/L as determined by a hydroxy radical concentration measuring method comprising applying the reactive gas to 0.4 mL of a 0.2 mol/L solution of DMPO (5,5-dimethyl-1-pyrroline-N-oxide) for 30 seconds with a distance from the outlet to a liquid surface of the solution being 5.0 mm, and measuring a hydroxyl radical concentration of the resulting solution by electron spin resonance (ESR) method.

The present invention discloses a medical therapeutic apparatus (100) which generates plasma and blows out an reactive gas generated by the generated plasma toward a target object from an outlet, wherein a temperature of the reactive gas at a target surface positioned at a distance of 1 mm or more and 10 mm or less from the outlet is 40 C. or less, and a radical concentration is 0.1 to 300 mol/L as determined by a hydroxy radical concentration measuring method comprising applying the reactive gas to 0.4 mL of a 0.2 mol/L solution of DMPO (5,5-dimethyl-1-pyrroline-N-oxide) for 30 seconds with a distance from the outlet to a liquid surface of the solution being 5.0 mm, and measuring a hydroxyl radical concentration of the resulting solution by electron spin resonance (ESR) method.