A precision control method for w-shaped section at the bottom of cargo hold of self-unloading ship

Abstract

The invention discloses a precision control method for W-shaped segments at the bottom of a self-unloading cargo hold in the field of ships. Firstly, an unloading margin is added to each sheet structure of the W-shaped segment, and after unloading, a sample punch is used to mark the transverse direction of the bucket opening. Coaming centerline 13, cut after on-site positioning; then make each piece structure separately, determine the horizontal installation reference plane of the W-shaped segment, the vertical hull centerline and the vertical main conveyor belt centerline, according to the center line of the main conveyor belt Carry out loading and positioning on the line, and carry out W-shaped section loading; then re-check the installation datum plane, main conveyor belt centerline and hull centerline determined before section loading; finally, coincide the main conveyor belt centerline with the bucket mouth transverse coaming centerline , assemble after trimming the cutting allowance; the present invention checks the accuracy of the installation positioning point by specifying the margin mode and cutting timing of the horizontal coaming of the bucket opening and the column, the installation content at different stages, and the requirements of the secondary review of the datum plane and the positioning line. The size matching situation ensures the accuracy requirements of assembly.

Description

technical field [0001] The invention belongs to the technical field of ships and relates to a self-unloading bulk carrier, the bottom of which holds a W shape. Background technique [0002] The W-shaped section at the bottom of the cargo hold of the self-unloading ship is the key structure in the construction process of the self-unloading ship. There is a bucket opening at the tip of the W-shaped bottom, and the main conveyor belt for conveying goods is located below the bucket opening. The W-shaped section is composed of inclined plates, longitudinal wall plates, columns, and longitudinal and transverse coamings of the bucket mouth. Two transverse inclined plates, one large and one small, are installed at the end of each hatch door. connected to the mouth and supported on the double bottom of the cargo hold by uprights or longitudinal wall panels. The middle position of each hatch is provided with an arched back, and the angle between the inclined plate and the horizontal ...

AI Technical Summary

Problems solved by technology

Usually, when making a W-shaped section, first connect the sloping plate, longitudinal wall plate, column and bucket mouth into a whole, and then mount the whole section on the double bottom. There are many, and the segment size is large. During the whole assembly and hoisting process, in order to ensure that the size of the bucket mouth meets the installation requirements of the self-unloading equipment, the difficulty of on-site construction is virtually increased, and the cost of man-hours increases accordingly. In the end, it directly affects the quality and efficiency of the W-shaped segment

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