CN-117068340-B - Mounting method for corrugated plate of MARKIII type enclosure system

CN117068340BCN 117068340 BCN117068340 BCN 117068340BCN-117068340-B

Abstract

The invention discloses a mounting method of corrugated plates for MARKIII type enclosure systems, which specifically comprises the following steps of S1, scribing central axes R1 and R2 on an insulation module of each side of a cargo hold, S2, scribing corrugated plate mounting grid lines according to the central axes R1 and R2 on each cargo hold side, S3, determining corrugated plate boundary lines of the dihedral angles of the cargo hold and scribing the corrugated plate boundary lines, S4, scribing corrugated plate mounting lines at four corners of the corrugated plates, aligning the corrugated plate mounting lines with the corrugated plate mounting grid lines, welding and fixing the corrugated plates, and finishing the mounting of the corrugated plates on the cargo hold insulation module. According to the corrugated plate installation line drawing method, the corrugated plate installation line is drawn by using the first corrugated plate tool and the second corrugated plate tool, and the corrugated plate installation line after drawing is aligned with the corrugated plate installation grid line, so that the installation accuracy of the corrugated plate is improved, and meanwhile, the requirements of corrugated plate lap joint and installation size are met.

Inventors

ZHAO ZHIKUN
HOU ZHAOGUO
HE ZHIJUN
WANG JIKUN
XU DEHU
YU WEI

Assignees

沪东中华造船(集团)有限公司

Dates

Publication Date: 20260505
Application Date: 20230927

Claims (6)

1. The method for installing the corrugated plate of the MARKIII-type enclosure system is characterized by comprising the following steps of: S1, scribing the central axes R1 and R2 on the insulating modules of each surface of the cargo hold; S2, performing corrugated plate installation grid line scribing according to the central axes R1 and R2 on each cargo compartment surface; s3, determining a corrugated plate boundary line of a dihedral angle of the cargo compartment, and scribing the corrugated plate boundary line; s4, a corrugated plate installation line is marked on four corners of the corrugated plate, the corrugated plate installation line is aligned with the corrugated plate installation grid line, the corrugated plate is welded and fixed, and the corrugated plate installation on the cargo hold insulation module is completed; the scribing of the corrugated plate mounting line is performed through a scribing tool, the scribing tool comprises a first corrugated plate tool and a second corrugated plate tool, and the first corrugated plate tool comprises scale marks and large corrugated holes; The whole pistol type corrugated plate fixture comprises a first corrugated plate fixture, wherein a large corrugated hole is formed in the lower portion of one end of the first corrugated plate fixture, the large corrugated hole is matched with the outer shape of large corrugations on a corrugated plate, the distance between one end of the first corrugated plate fixture and the large corrugated hole is 30mm, scale marks are arranged at the lower end of the other end of the first corrugated plate fixture, the distances between the two ends of the scale marks and the center line of the large corrugated hole are 170mm and 240mm respectively, and the scale interval of the scale marks is 1mm; The second corrugated plate tool comprises scale marks and small corrugated holes, wherein the whole second corrugated plate tool is in a pistol shape, the small corrugated holes are formed in the lower portion of one end of the second corrugated plate tool and are matched with the external shapes of the small corrugations on the corrugated plate, the distance between one end of the second corrugated plate tool and the small corrugated holes is 40mm, the lower end of the other end of the second corrugated plate tool is provided with the scale marks, the distances between the two ends of the scale marks and the center line of the small corrugated holes are 170mm and 240mm respectively, and the scale spacing of the scale marks is 1mm; the scribing of the corrugated plate mounting line comprises the following steps: s41, when a corrugated plate mounting line of a large corrugated plate in the width direction of the corrugated plate is scribed, using a first corrugated plate tool, mounting large corrugated holes on the first corrugated plate tool on the large corrugated plate, and scribing the corrugated plate mounting line by using corresponding sizes on the scale lines of the first corrugated plate tool according to the sizes of each corrugated plate mounting line, wherein the scale lines face the outer sides of the corrugated plates; s42, when a corrugated plate mounting line of a large corrugated plate in the length direction of the corrugated plate is scribed, a second corrugated plate tool is used, small corrugated holes on the second corrugated plate tool are mounted on the small corrugated plates, scale lines face the outer sides of the corrugated plates, and corresponding size scribing corrugated plate mounting lines are found on the scale lines of the second corrugated plate tool according to the size of each corrugated plate mounting line; S43, after the scribing of the mounting lines on the corrugated plates mounted on the cargo compartment surface is completed, the mounting lines on the corrugated plates are correspondingly mounted and welded with the corrugated plate mounting grid lines, and the mounting and welding fixation of all the corrugated plates is sequentially completed.
2. The method for installing corrugated plates of MARKIII-type enclosure system according to claim 1, wherein the central axis of the insulating module of each face of the cargo hold is defined by returning the sample points of R1 and R2 on the bulkhead to the corresponding insulating module of the cargo hold, connecting the sample points of R1 and R2 by ink lines, forming central axes R1 and R2 on each face of the cargo hold, and forming longitudinal direction loops, transverse direction loops and horizontal direction loops on the central axes R1 and R2 of each face of the cargo hold.
3. The method of installing corrugated board for MARKIII type enclosure system according to claim 2, wherein the theoretical tolerance of the longitudinal direction ring, the transverse direction ring and the horizontal direction ring to the center line of the corresponding anchor bar is ±2mm.
4. The method for installing corrugated plates of MARKIII-type enclosure system according to claim 1 is characterized by comprising the specific steps of defining grid points of four corners of each corrugated plate by using steel needles according to the directions of central axes R1 and R2 on each cargo compartment surface and the distances between four corners of each installed corrugated plate and the central axes R1 and R2 respectively according to the installation size of each corrugated plate on each cargo compartment surface, determining the installation positions of the corrugated plates, and connecting the grid points defined by the steel needles by using ink fountain lines according to the horizontal direction and the vertical direction to form the corrugated plate installation grid lines.
5. The method for installing corrugated plates of MARKIII-type enclosure system according to claim 4 is characterized by that after the corrugated plate installation grid lines are cut, making error detection on the corrugated plate installation grid lines, specifically, measuring the size of two diagonal lines of every grid of corrugated plate installation grid lines, comparing the size difference of two diagonal lines, when the size difference of two diagonal lines of every grid exceeds 2mm, making redetermining cut on grid points of correspondent grid.
6. The method for installing corrugated plates of MARKIII enclosure system according to claim 1, wherein the dihedral angle of the cargo hold is the included angle between two adjacent cargo hold surfaces, the included angle degree of the dihedral angle of the cargo hold is 90 ° and 135 °, and the boundary line of the corrugated plates at the dihedral angle of the cargo hold is defined as: S31, when the included angle degree of the dihedral angle of the cargo hold is 90 degrees, marking a set point every one meter on the cargo hold surfaces on two sides of the dihedral angle of the cargo hold, then connecting the set points marked on each cargo hold surface by using straight lines through ink fountain elastic lines to form corrugated plate boundary lines, wherein the distance between the corrugated plate boundary lines and the dihedral angle of the cargo hold is 165mm, and the error size of the corrugated plate boundary lines is-8-10 mm; s32, when the included angle degree of the dihedral angle of the cargo hold is 135 degrees, drawing a drawing point every one meter on the cargo hold surfaces on two sides of the dihedral angle of the cargo hold, connecting the drawing points of each cargo hold surface by using straight lines through ink fountain elastic lines to form corrugated plate boundary lines, wherein the distance between the corrugated plate boundary lines and the dihedral angle of the cargo hold surface is 88mm, the error size of the corrugated plate boundary lines is-5-15 mm, and finishing drawing of all corrugated plate boundary lines of each cargo hold surface.

Description

Mounting method for corrugated plate of MARKIII type enclosure system Technical Field The invention belongs to the technical field of ship construction, and particularly relates to a mounting method for corrugated plates of MARKIII type enclosure systems. Background The MARK III type LNG containment system is a novel LNG maintenance system which is introduced by French GTT company, and corrugated plates (corrugation membrane sheet) are the most main parts in the construction process of a liquid cargo tank of the MARK III type LNG containment system, are suitable for transporting the liquefied natural gas at-163 degrees, and are directly contacted with the liquefied natural gas. The quality of the corrugated plate determines the integrity of the whole main layer film, the tightness of the main layer film and the finishing quality of the whole cargo tank. In addition, considering that the corrugated plate is expensive, if the installation position is wrong, the large-area repair is caused, the corrugated plate is required to be dismantled for repair in a large area, the cost is high, the logistics progress and the arrival time are not controlled by the my, the labor hour for disassembling the corrugated plate is huge, the period is long, the ship-to-ship period is easily influenced, and huge economic, period and quality losses are brought. How to solve the problem, how to accurately and reliably carry out the corrugated plate installation work without affecting the quality and the period of the liquid cargo tank enclosure system, ensure the rapid and convenient installation of the corrugated plate, and reduce the construction difficulty and the cost of LNG, which is a major breakthrough problem of the invention. Disclosure of Invention The invention aims to overcome the defects in the prior art and provide a mounting method for corrugated plates of MARKIII type enclosure systems, the method of the invention performs scribing of corrugated plate mounting lines by using a first corrugated plate tool and a second corrugated plate tool, the corrugated plate mounting lines after being scribed are aligned with the corrugated plate mounting grid lines, so that the mounting accuracy of the corrugated plate is improved, and the requirements of corrugated plate lap joint and mounting size are met. In order to achieve the above object, the present invention provides the following technical solutions: the method for installing the corrugated plate of the MARKIII-type enclosure system specifically comprises the following steps: S1, scribing the central axes R1 and R2 on the insulating modules of each surface of the cargo hold; S2, performing corrugated plate installation grid line scribing according to the central axes R1 and R2 on each cargo compartment surface; s3, determining a corrugated plate boundary line of a dihedral angle of the cargo compartment, and scribing the corrugated plate boundary line; S4, a corrugated plate installation line is cut at four corners of the corrugated plate, the corrugated plate installation line and the corrugated plate installation grid line are aligned and installed, the corrugated plate is welded and fixed, and the corrugated plate installation on the cargo hold insulation module is completed. Further, the central axis of the insulating module of each cargo hold surface is marked by specifically returning the sample punching points of R1 and R2 on the bulkhead to the corresponding cargo hold insulating module, connecting the sample punching points of R1 and R2 through ink duct wires, forming the central axis R1 and R2 on each cargo hold surface, and forming a longitudinal direction ring, a transverse direction ring and a horizontal direction ring on the central axis R1 and R2 of each cargo hold surface. Further, the theoretical tolerance of the longitudinal direction ring, the transverse direction ring and the horizontal direction ring with the central line of the corresponding anchoring strip is +/-2 mm. Further, the concrete steps of dividing the corrugated plate installation grid lines are that according to the installation size of the corrugated plates on each cargo compartment surface, the grid points at the four corners of the corrugated plates are determined by using steel needles according to the distances between the four corners of the installed corrugated plates and the central axes R1 and R2 along the directions of the central axes R1 and R2 on the cargo compartment surface respectively, the installation positions of the corrugated plates are determined, and then the corrugated plate grid points determined by using the steel needles are connected by using ink fountain lines according to the horizontal direction and the vertical direction to form the corrugated plate installation grid lines. Further, after the corrugated plate installation grid lines are scribed, error detection is carried out on the corrugated plate installation grid lines, specifically, the sizes of two d