초록 ▼

Fluid jet apparatus and method for cleaning material from the inside of a tubular conduit utilizing a cleaning head that lies adjacent to one wall of the conduit and includes at least two fluid jet forming means for directing a plurality of high pressure fluid cutting jets in a forward direction and

Fluid jet apparatus and method for cleaning material from the inside of a tubular conduit utilizing a cleaning head that lies adjacent to one wall of the conduit and includes at least two fluid jet forming means for directing a plurality of high pressure fluid cutting jets in a forward direction and at an acute angle relative to the axis of the head and the conduit so that they are directed toward the opposite wall of the conduit. The cleaning head is rotated around and remains adjacent to the wall of the conduit and is advanced into the conduit as the jets cut away the material whereby the fluid jets create an asymmetric cutting pattern on the surface of the material and the counter thrust of the fluid jets keeps the cleaning head offset relative to the axis of the conduit and against the wall of the conduit to provide passage for removal of the cut material and spent fluid away from the cutting area and out the end of conduit.

대표청구항 ▼

A method for cleaning material from the inside of a tubular component with high velocity fluid jets comprising: positioning a nozzle body adjacent to one wall of the tubular component so that the body is offset relative to the axis of the component, the nozzle body having at least two fluid jet form

A method for cleaning material from the inside of a tubular component with high velocity fluid jets comprising: positioning a nozzle body adjacent to one wall of the tubular component so that the body is offset relative to the axis of the component, the nozzle body having at least two fluid jet forming means mounted on its forward end for directing a plurality of angled high pressure fluid cutting jets in a direction forward of the nozzle body, the angle of the jets being such that they are only directed toward the wall of the tubular component opposite said one wall and the nozzle body being located so that the cutting jet of at least one of the jet forming means will be directed across the axis of the tubular component; providing high pressure fluid to the jet forming means; moving the tubular component and the nozzle body so that the nozzle body moves around and remains adjacent to the inside wall of the tubular component; and advancing the nozzle body into the tubular component as the material is eroded whereby the fluid jets form an asymmetric cutting pattern on the surface of the material being eroded and the counterthrust of the fluid jets keeps the nozzle body offset relative to the axis of the tubular component and against said one wall of the tubular component to provide passage for removal of the eroded material and spent fluid out of the end of the tubular component.