Pressure based liquid feed system for suspension plasma spray coatings
AssigneeOerlikon Metco (US) Inc.
InventorsElliot M. Cotler, Ronald Molz
Life of this patent
Estimating the term…
Abstract
Apparatus (1) for injecting a liquid in an area of a thermal spray gun (100). The apparatus (1) includes an injector cleaning device (10) having an inlet connectable (19) to at least one feedstock supply line (18), an inlet connectable (17) to at least one gas supply line (16), and an inlet connectable (21) to at least one liquid medium supply line (20). An injector (30) orifice is coupled to the injector cleaning device (10) and is adapted to at least one of inject a liquid jet into a hot stream created in the area of the thermal spray gun (100) and receive feedstock, gas and liquid passing into the inlets.
Claims27
An apparatus for injecting a liquid in an area of a thermal spray gun, the apparatus comprising:
- an injector cleaning device comprising:
- an inlet connectable to at least one feedstock supply line;
- an inlet connectable to at least one gas supply line;
- an inlet connectable to at least one liquid medium supply line;
- and
- an atomizing chamber receiving gas via the at least one gas supply line and cleaning liquid via the at least one liquid medium supply line and producing a purging mist that can be fed to feedstock supply passage;
- an injector orifice in fluid communication with the atomizing chamber of the injector cleaning device and being adapted to at least one of:
- inject a liquid jet into the area of the thermal spray gun;
- and
- receive feedstock, gas and liquid passing into said inlets.
An injector cleaning apparatus for a thermal spray gun, comprising:
- at least one feedstock supply line coupled to a feed stock supply passage;
- an injector orifice arranged downstream and being in fluid communication with the feedstock supply passage;
- at least one gas supply line;
- at least one liquid medium supply line configured to supply cleaning liquid medium;
- a mist chamber receiving gas and cleaning liquid respectively via said gas supply line and said liquid medium supply line;
- the mist chamber being configured to supply a purging mist to the feedstock supply passage at a location between said feedstock supply line and the injector orifice,
- wherein the at least one feedstock supply line, the at least one gas supply line, and the at least one liquid medium supply line are located upstream of the injector orifice located in an area of the thermal spray gun.
An apparatus for injecting a liquid in an area of a thermal spray gun, the apparatus comprising:
- an injector orifice configured to discharge each of:
- a feedstock material received a feedstock supply line;
- and
- a purging mist;
- an injector cleaning device comprising:
- an inlet connectable to at least one gas supply line;
- an inlet connectable to at least one cleaning liquid supply line;
- an atomizing chamber receiving gas via the at least one gas supply line and cleaning liquid via the at least one cleaning liquid supply line to produce the purging mist;
- and
- a check valve arranged in a feedstock supply passage between a feedstock supply inlet and the injector orifice,
- wherein the purging mist is fed to the feedstock supply passage at a location downstream of the check valve and upstream of the injector orifice.
Dependencies are inferred from the claim text.