Machine for cutting nozzles of reactor vessels
AssigneeDoosan Heavy Industries Construction Co., Ltd
InventorsKwang Soo Park, Hae Woong Kim
Life of this patent
Estimating the term…
Abstract
Disclosed herein is a machine for cutting nozzles of reactor vessels. The machine for cutting nozzles of reactor vessels comprises a cutting unit positioned at an upper surface edge of a reactor vessel having a nozzle and having a saw blade part having different contact areas to cut the nozzle, a drive unit providing the saw blade part with rotary power, and a foreign substance suction unit provided at one end of the cutting unit in contiguity with the saw blade part to suck foreign substances generated when the nozzle is cut by the saw blade part, wherein the foreign substance suction unit sucks the foreign substances by approaching an outer peripheral surface of the nozzle when the saw blade part moves in a cutting direction of the nozzle.
Claims20
A method for cutting a nozzle of a reactor vessel using a machine comprising first and second saw blades having different contact areas with respect to an outer surface of the nozzle, the method comprising:
- first cutting the nozzle by applying the first saw blade to the nozzle to cut through the nozzle in a radial direction of the nozzle, the first saw blade having a first width establishing a first contact area of the first saw blade with respect to the outer surface of the nozzle;
- and
- second cutting the nozzle by applying the second saw blade to the nozzle after applying the first saw blade to the nozzle to cut through the nozzle that is cut by the first cutting, the second saw blade having a second width establishing a second contact area of the second saw blade with respect to the outer surface of the nozzle,
- wherein the second contact area of the second saw blade is different from the first contact area of the first saw blade in the radial direction, and
- wherein the first width of the first saw blade in the axial direction is greater than the second width of the second saw blade.
A method for cutting a nozzle of a reactor vessel using a machine comprising first and second saw blades having different contact areas with respect to an outer surface of the nozzle, and a foreign substance suction unit to suck foreign substances generated when the nozzle is cut by the first and second saw blades, the method comprising:
- first cutting the nozzle by moving the first saw blade in a cutting direction of the nozzle and applying the first saw blade to the nozzle in order to cut through the nozzle in a radial direction of the nozzle, the first saw blade having a first width establishing a first contact area of the first saw blade with respect to the outer surface of the nozzle;
- second cutting the nozzle by moving the second saw blade in the cutting direction and applying the second saw blade to the nozzle after applying the first saw blade to the nozzle in order to cut through the nozzle that is cut by the first cutting, the second saw blade having a second width establishing a second contact area of the second saw blade with respect to the outer surface of the nozzle;
- moving the foreign substance suction unit toward the outer surface of the nozzle to suck the foreign substances when the first and second saw blades move in the cutting direction of the nozzle;
- controlling a distance between the foreign substance suction unit and the nozzle,
- wherein the second contact area of the second saw blade is different from the first contact area of the first saw blade in the radial direction, and
- wherein the first width of the first saw blade is greater than the second width of the second saw blade.
Dependencies are inferred from the claim text.