Processing apparatus, corrugated plate, and storage container

A processing apparatus for a corrugated plate of a liquefied gas storage tank for marine engineering equipment, the corrugated plate having longitudinal corrugations and transverse corrugations that have an intersection portion, wherein the processing apparatus comprises:

• a pair of slide plates movable away from and close to each other along a transverse direction;
• a pair of press plates correspondingly located on top sides of the pair of slide plates to press a blank plate between the pair of slide plates and the pair of press plates tightly;
• a shaping block located between the pair of slide plates, a bottom end of the shaping block having a predetermined forming profile with a transverse size gradually reduced towards a bottom side;
• and
• a driving mechanism comprising:
• a slide plate driving portion in contact with the pair of slide plates;
• and
• a shaping block driving portion connected with the shaping block,
• wherein the shaping block driving portion and the slide plate driving portion are fixed relative to each other, so that the slide plate driving portion drives the pair of slide plates to approach each other at a first predetermined speed, the shaping block driving portion drives the shaping block to move downward at a second predetermined speed, and the first predetermined speed and the second predetermined speed are specifically correlated with respect to a predetermined forming profile of the intersection portion, wherein the first predetermined speed is a non-uniform speed, and the second predetermined speed is a uniform speed,
• wherein the shaping block comprises a longitudinal corrugation shaping block extending along a longitudinal direction and an intersection portion shaping block located at a center of the longitudinal corrugation shaping block longitudinally, only a transverse size of the longitudinal corrugation shaping block is gradually reduced in a direction towards the bottom side, and both a transverse size and a longitudinal size of the intersection portion shaping block are gradually reduced in the direction towards the bottom side, wherein a diversion core having a predetermined punch shape is installed on the intersection portion shaping block, and a hardness of the diversion core is greater than that of other portions of the shaping block;
• wherein the pair of slide plates each has a force pin protruding longitudinally and having a smooth external profile, an involute face for getting contact with the force pins is formed on the slide plate driving portion, and the involute face is designed to cause the first predetermined speed and the second predetermined speed to be specifically correlated;
• and
• wherein the involute face comprises a first inclined face, a straight wall face, and a second inclined face from top to bottom, wherein the first inclined face and the second inclined face form an obtuse angle with a vertical line, and the straight wall face is parallel to the vertical line.