Patent ID: 9463499
Filing Date: 2016-10-11
CPC Classification: B21D

Claim Text:
1. A method for correcting deformation of a cylindrical reaction vessel to correct deformation of the cylindrical reaction vessel by inserting an apparatus for correcting the deformation inside of the cylindrical reaction vessel, the apparatus for correcting the deformation, comprising: multiple cylinder arms radially extendable to a circumference, a plurality of deformation-correcting heads, each of the plurality of deformation-correcting heads being arranged on an outer end of each of the cylinder arms, a hydraulic power unit connected to the cylinder arms and driving the deformation-correcting heads, a stroke detector for detecting a stroke of the deformation-correcting heads, an elevating device for supporting the cylinder arms and the deformation-correcting heads inside of the cylindrical reaction vessel, and a damper connecting the elevating device with the cylinder arms and the deformation-correcting heads to absorb shock when the cylinder arms and the deformation-correcting heads oscillate upward and downward during a deformation-correcting operation, the method for correcting the deformation comprising: a step of inserting the apparatus for correcting the deformation into the cylindrical reaction vessel in a vertical direction by operating the elevating device, and a step of pressing the reaction vessel while adjusting a stroke of the deformation-correcting heads based on an amount of deformation of the cylindrical reaction vessel, wherein the apparatus for correcting deformation further comprises a sensor measuring an amount of deformation in a radial direction of an inner surface of the cylindrical reaction vessel, a measured value measured by the sensor is transmitted to a computer arranged in a control room by a communication, and the measured value is recorded in a recording device arranged in the computer.