A method for installing MARK III containment system wave plates

Abstract

This invention discloses a method for installing corrugated panels for a MARKIII type enclosure system. The method specifically includes the following steps: S1, marking the central axes R1 and R2 on the insulation modules of each cargo hold surface; S2, marking the corrugated panel installation grid lines according to the central axes R1 and R2 on each cargo hold surface; S3, determining the corrugated panel boundary lines at the dihedral corners of the cargo hold and marking these boundary lines; S4, marking corrugated panel installation lines at the four corners of the corrugated panel, aligning these installation lines with the corrugated panel installation grid lines, and welding the corrugated panels to complete the installation of the corrugated panels on the cargo hold insulation modules. This invention improves the installation accuracy of the corrugated panels by using a first and a second corrugated panel fixture to mark the corrugated panel installation lines and aligning them with the corrugated panel installation grid lines, while also meeting the requirements for corrugated panel overlap and installation dimensions.

Description

Technical Field

[0001] This invention belongs to the field of shipbuilding technology, specifically relating to an installation method for corrugated plates used in the MARKIII type enclosure system. Background Technology

[0002] The MARK III LNG containment system is a new type of LNG containment system launched by the French company GTT. The corrugated membrane sheet is the most crucial component in the construction of the cargo tank within the MARK III LNG containment system. It is suitable for transporting liquefied natural gas at -163 degrees Celsius and comes into direct contact with the liquefied natural gas. The installation quality of the corrugated membrane sheet determines the integrity and tightness of the entire main membrane layer, as well as the final quality of the entire cargo tank. Furthermore, considering the high cost of the corrugated membrane sheet, incorrect installation can lead to extensive repairs, requiring the removal of large sections of the membrane sheet. This is not only costly but also puts logistical and delivery times out of our control. The time-consuming and lengthy process of installing and removing the membrane sheet can significantly impact the delivery schedule, resulting in substantial economic, time-consuming, and quality losses.

[0003] How to solve this problem, how to accurately and reliably install corrugated plates without affecting the quality and cycle of the liquid cargo tank containment system, and how to ensure that corrugated plate installation is quick and convenient, thereby reducing the construction difficulty and cost of LNG, is the key breakthrough of this invention. Summary of the Invention

[0004] The purpose of this invention is to overcome the shortcomings of the prior art and provide an installation method for corrugated sheets in the MARKIII type enclosure system. The method of this invention uses a first corrugated sheet fixture and a second corrugated sheet fixture to mark the corrugated sheet installation lines, and aligns the marked corrugated sheet installation lines with the corrugated sheet installation grid lines for installation, thereby improving the installation accuracy of the corrugated sheet and meeting the requirements for corrugated sheet overlap and installation dimensions.

[0005] To achieve the above-mentioned objectives, the technical solution provided by this invention patent is as follows:

[0006] A method for installing corrugated sheets for the MARKIII type enclosure system, the method specifically includes the following steps:

[0007] S1, mark the central axes R1 and R2 on the insulation modules of each side of the cargo hold;

[0008] S2, draw the corrugated plate installation grid lines according to the center axes R1 and R2 of each cargo hold deck;

[0009] S3, determine the corrugated plate boundary line at the dihedral corner of the cargo hold, and draw the corrugated plate boundary line;

[0010] S4. Draw corrugated plate installation lines at the four corners of the corrugated plate, align the corrugated plate installation lines with the corrugated plate installation grid lines, and weld and fix the corrugated plate to complete the installation of the corrugated plate on the cargo hold insulation module.

[0011] Furthermore, the marking of the central axis on the insulation module of each cargo hold surface is specifically as follows: the punch points of R1 and R2 on the bulkhead are returned to the corresponding cargo hold insulation module, and the punch points of R1 and R2 are connected by ink lines to form central axes R1 and R2 on each cargo hold surface. The central axes R1 and R2 on each cargo hold surface form a longitudinal direction loop, a transverse direction loop and a horizontal direction loop.

[0012] Furthermore, the theoretical tolerance between the longitudinal ring, the transverse ring, and the horizontal ring and the center line of the corresponding anchoring strip is ±2mm.

[0013] Furthermore, the specific steps for marking the corrugated plate installation grid lines are as follows: based on the dimensions of the corrugated plates installed on each cargo hold deck, along the directions of the central axes R1 and R2 on the cargo hold deck, use steel needles to mark the grid points at the four corners of the corrugated plates according to the distances of the four corners of the installed corrugated plates from the central axes R1 and R2, thus determining the installation position of the corrugated plates. Then, connect the corrugated plate grid points marked by the steel needles in the horizontal and vertical directions using ink lines to form the corrugated plate installation grid lines.

[0014] Furthermore, after the corrugated plate installation grid lines are drawn, error detection is performed on the corrugated plate installation grid lines. Specifically, the dimensions of the two diagonals of each grid are measured, and the difference between the dimensions of the two diagonals is compared. When the difference between the dimensions of the two diagonals of each grid exceeds 2mm, the grid points of the corresponding grid are re-determined and drawn.

[0015] Furthermore, the dihedral angle of the cargo hold is the included angle between two adjacent cargo hold surfaces, with the included angles being 90° and 135°; the corrugated plate boundary line at the dihedral angle of the cargo hold is specifically drawn as follows:

[0016] S31, when the included angle of the dihedral angle of the cargo hold is 90°, mark the fixed points on the cargo hold surface every meter on both sides of the dihedral angle of the cargo hold surface, and then connect the fixed points marked on each cargo hold surface with straight lines using ink lines to form the corrugated plate boundary line. The distance between the corrugated plate boundary line and the dihedral angle of the cargo hold surface is 165mm, and the error dimension of the corrugated plate boundary line is -8-10mm.

[0017] S32, when the included angle of the dihedral angle of the cargo hold is 135°, mark the positioning points on the cargo hold surface on both sides of the dihedral angle of the cargo hold surface at intervals of one meter, and then connect the positioning points marked on each cargo hold surface with straight lines using ink lines to form the corrugated plate boundary line. The distance between the corrugated plate boundary line and the dihedral angle of the cargo hold surface is 88mm, and the error dimension of the corrugated plate boundary line is -5-15mm; complete the marking of all corrugated plate boundary lines for each cargo hold surface.

[0018] Furthermore, the corrugated plate mounting line is drawn using a scribing fixture, which includes a first corrugated plate fixture and a second corrugated plate fixture. The first corrugated plate fixture includes scale lines and large corrugated holes.

[0019] Furthermore, the first corrugated plate fixture is pistol-shaped. A large corrugated hole is provided at the lower part of one end of the first corrugated plate fixture. The large corrugated hole matches the outer shape of the large corrugations on the corrugated plate. The distance between the first corrugated plate fixture end near the large corrugated hole and the large corrugated hole is 30mm. A scale line is provided at the lower end of the other end of the first corrugated plate fixture. The distances from the two ends of the scale line to the center line of the large corrugated hole are 170mm and 240mm, respectively. The scale interval of the scale line is 1mm.

[0020] Furthermore, the second corrugated plate fixture includes scale lines and small corrugated holes; the second corrugated plate fixture is generally pistol-shaped, and a small corrugated hole is provided at the lower part of one end of the second corrugated plate fixture. The small corrugated hole matches the outer shape of the large corrugations on the corrugated plate, and the distance between the second corrugated plate fixture end near the small corrugated hole and the small corrugated hole is 40mm; a scale line is provided at the lower end of the other end of the second corrugated plate fixture, and the distances from the two ends of the scale line to the center line of the small corrugated hole are 170mm and 240mm respectively, and the scale interval of the scale line is 1mm.

[0021] Furthermore, the marking of the corrugated plate mounting lines is specifically as follows:

[0022] S41, When marking the corrugated plate installation line of the large corrugated plate in the width direction of the corrugated plate, the first corrugated plate fixture is used, the large corrugated hole on the first corrugated plate fixture is installed on the large corrugation, the scale line faces the outside of the corrugated plate, and the corresponding size is found on the scale line of the first corrugated plate fixture according to the size of each corrugated plate installation line to mark the corrugated plate installation line.

[0023] S42, When marking the corrugated plate installation line of the large corrugated plate in the length direction of the corrugated plate, use the second corrugated plate fixture, install the small and large corrugated holes on the second corrugated plate fixture on the small corrugated plate, with the scale line facing the outside of the corrugated plate, and find the corresponding size on the scale line of the second corrugated plate fixture according to the size of each corrugated plate installation line to mark the corrugated plate installation line.

[0024] S43, after the installation lines on the corrugated plates installed on the cargo hold deck are marked, the installation lines on the corrugated plates are aligned with the corrugated plate installation grid lines and then welded together. This process is repeated to complete the installation, welding and fixing of all the corrugated plates.

[0025] Based on the above technical solution, the installation method of corrugated sheet for MARKIII type enclosure system of this invention has achieved the following technical advantages through practical application:

[0026] 1. The present invention provides an installation method for corrugated sheets for a MARKIII type enclosure system. By using a first corrugated sheet fixture and a second corrugated sheet fixture to mark the corrugated sheet installation lines, the marked corrugated sheet installation lines are aligned with the corrugated sheet installation grid lines for installation, thereby improving the installation accuracy of the corrugated sheets and meeting the requirements for corrugated sheet overlap and installation dimensions. Attached Figure Description

[0027] Figure 1 This is a schematic diagram of the longitudinal, transverse, and horizontal rings of the cargo hold in an installation method for corrugated plates of a MARKIII type enclosure system according to the present invention.

[0028] Figure 2 This is a schematic diagram of the corrugated plate installation grid lines in an installation method for corrugated plates used in a MARKIII type enclosure system according to the present invention.

[0029] Figure 3 This is a structural diagram of the first corrugated plate tooling in the installation method of corrugated plates for the MARKIII type enclosure system of the present invention.

[0030] Figure 4 This is a structural diagram of the second corrugated plate tooling in the installation method of corrugated plates for the MARKIII type enclosure system of the present invention. Detailed Implementation

[0031] To make the objectives, technical solutions, and advantages of this invention clearer, the invention is described below with reference to specific examples shown in the accompanying drawings. However, it should be understood that these descriptions are merely exemplary and not intended to limit the scope of the invention. Furthermore, descriptions of well-known structures and techniques are omitted in the following description to avoid unnecessarily obscuring the concept of the invention.

[0032] like Figure 1-4 As shown, this invention pertains to an installation method for corrugated sheets used in a MARKIII type enclosure system, and the method specifically includes the following steps:

[0033] S1, mark the central axes R1 and R2 on the insulation modules of each side of the cargo hold;

[0034] S2, draw the corrugated plate installation grid lines 4 according to the center axes R1 and R2 of each cargo hold deck;

[0035] S3, determine the corrugated plate boundary line at the dihedral corner of the cargo hold, and draw the corrugated plate boundary line;

[0036] S4. Draw corrugated plate installation lines at the four corners of the corrugated plate, align the corrugated plate installation lines with the corrugated plate installation grid lines 4, and weld and fix the corrugated plate to complete the installation of the corrugated plate on the cargo hold insulation module. By using the first corrugated plate tooling and the second corrugated plate tooling to draw the corrugated plate installation lines, and aligning the drawn corrugated plate installation lines with the corrugated plate installation grid lines 4, the installation accuracy of the corrugated plate is improved, while meeting the requirements for corrugated plate overlap and installation dimensions.

[0037] like Figure 1 As shown, the central axis marking on the insulation module of each cargo hold surface is specifically as follows: the punch points of R1 and R2 on the bulkhead are returned to the corresponding cargo hold insulation module, and the punch points of R1 and R2 are connected by ink lines to form central axes R1 and R2 on each cargo hold surface. The central axes R1 and R2 on each cargo hold surface form a longitudinal ring 3, a transverse ring 2, and a horizontal ring 1.

[0038] The theoretical tolerance between the longitudinal ring 3, the transverse ring 2, and the horizontal ring 1 and the center line of the corresponding anchoring strip is ±2mm.

[0039] like Figure 2 As shown, the specific steps for marking the corrugated plate installation grid line 4 are as follows: Based on the dimensions of the corrugated plate installation on each cargo hold surface, along the directions of the central axes R1 and R2 on the cargo hold surface, use steel needles to mark the grid points at the four corners of the corrugated plate according to the distances of the four corners of the installed corrugated plate from the central axes R1 and R2, thus determining the installation position of the corrugated plate. Then, connect the corrugated plate grid points marked by the steel needles in the horizontal and vertical directions using ink lines to form the corrugated plate installation grid line 4.

[0040] After the corrugated plate installation grid line 4 is drawn, the error detection of the corrugated plate installation grid line 4 is carried out. Specifically, the dimensions of the two diagonals of each grid of the corrugated plate installation grid line 4 are measured and the difference between the dimensions of the two diagonals is compared. When the difference between the dimensions of the two diagonals of each grid exceeds 2mm, the grid points of the corresponding grid are re-determined and drawn.

[0041] The dihedral angle of the cargo hold is the included angle between two adjacent cargo hold surfaces, with included angles of 90° and 135°; the corrugated plate boundary line at the dihedral angle of the cargo hold is specifically drawn as follows:

[0042] S31, when the included angle of the dihedral angle of the cargo hold is 90°, mark the fixed points on the cargo hold surface every meter on both sides of the dihedral angle of the cargo hold surface, and then connect the fixed points marked on each cargo hold surface with straight lines using ink lines to form the corrugated plate boundary line. The distance between the corrugated plate boundary line and the dihedral angle of the cargo hold surface is 165mm, and the error dimension of the corrugated plate boundary line is -8-10mm.

[0043] S32, when the included angle of the dihedral angle of the cargo hold is 135°, mark the positioning points on the cargo hold surface on both sides of the dihedral angle of the cargo hold surface at intervals of one meter, and then connect the positioning points marked on each cargo hold surface with straight lines using ink lines to form the corrugated plate boundary line. The distance between the corrugated plate boundary line and the dihedral angle of the cargo hold surface is 88mm, and the error dimension of the corrugated plate boundary line is -5-15mm; complete the marking of all corrugated plate boundary lines for each cargo hold surface.

[0044] like Figure 3 and Figure 4 As shown, the corrugated plate mounting line is drawn by a scribing fixture, which includes a first corrugated plate fixture and a second corrugated plate fixture. The first corrugated plate fixture includes a scale line 51 and a large corrugated hole 52.

[0045] The first corrugated plate fixture is pistol-shaped. A large corrugated hole 52 is provided at the lower part of one end of the first corrugated plate fixture. The large corrugated hole 52 matches the outer shape of the large corrugations on the corrugated plate. The distance between the first corrugated plate fixture end near the large corrugated hole 52 and the large corrugated hole 52 is 30mm. A scale line 51 is provided at the lower end of the other end of the first corrugated plate fixture. The distances from the two ends of the scale line 51 to the center line of the large corrugated hole 52 are 170mm and 240mm, respectively. The scale interval of the scale line 51 is 1mm.

[0046] The second corrugated plate fixture includes scale lines 51 and small corrugated holes 61. The second corrugated plate fixture is pistol-shaped. A small corrugated hole 61 is provided at the lower part of one end of the second corrugated plate fixture. The small corrugated hole 61 matches the outer shape of the large corrugations on the corrugated plate. The distance between the second corrugated plate fixture end near the small corrugated hole 61 and the small corrugated hole 61 is 40mm. A scale line 51 is provided at the lower end of the other end of the second corrugated plate fixture. The distances from the two ends of the scale line 51 to the center line of the small corrugated hole 61 are 170mm and 240mm, respectively. The scale interval of the scale line 51 is 1mm.

[0047] The marking of the corrugated plate installation line is as follows:

[0048] S41, when marking the corrugated plate installation line of the large corrugated plate in the width direction of the corrugated plate, the first corrugated plate fixture is used, the large corrugated hole 52 on the first corrugated plate fixture is installed on the large corrugation, the scale line 51 faces the outside of the corrugated plate, and the corresponding size is found on the scale line 51 of the first corrugated plate fixture according to the size of each corrugated plate installation line to mark the corrugated plate installation line.

[0049] S42, when marking the corrugated plate installation line of the large corrugated plate in the length direction of the corrugated plate, the second corrugated plate fixture is used. The small and large corrugated holes 52 on the second corrugated plate fixture are installed on the small corrugations, with the scale line 51 facing the outside of the corrugated plate. According to the size of each corrugated plate installation line, the corresponding size is found on the scale line 51 of the second corrugated plate fixture to mark the corrugated plate installation line.

[0050] S43, after the installation lines on the corrugated plates installed on the cargo hold deck are marked, the installation lines on the corrugated plates are installed and welded to correspond with the installation grid lines 4 of the corrugated plates, and the installation, welding and fixing of all corrugated plates are completed in sequence.

[0051] Finally, it should be noted that the above embodiments are only used to illustrate the technical solutions of the present invention and not to limit them; although the present invention has been described in detail with reference to preferred embodiments, those skilled in the art should understand that modifications can still be made to the specific implementation of the invention or equivalent substitutions can be made to some technical features without departing from the spirit of the technical solutions of the present invention, and all such modifications and substitutions should be covered within the scope of the technical solutions claimed in the present invention.

Claims

1. A method for installing corrugated sheets for a MARKIII type enclosure system, characterized in that, The method specifically includes the following steps: S1, mark the central axes R1 and R2 on the insulation modules of each side of the cargo hold; S2, draw the corrugated plate installation grid lines according to the center axes R1 and R2 of each cargo hold deck; S3, determine the corrugated plate boundary line at the dihedral corner of the cargo hold, and draw the corrugated plate boundary line; S4. Draw corrugated plate installation lines at the four corners of the corrugated plate, align the corrugated plate installation lines with the corrugated plate installation grid lines, and weld and fix the corrugated plate to complete the installation of the corrugated plate on the cargo hold insulation module. The corrugated plate mounting line is marked by a marking fixture, which includes a first corrugated plate fixture and a second corrugated plate fixture. The first corrugated plate fixture includes scale lines and large corrugated holes. The first corrugated plate fixture is pistol-shaped. A large corrugated hole is provided at the lower part of one end of the first corrugated plate fixture. The large corrugated hole matches the outer shape of the large corrugations on the corrugated plate. The distance between one end of the first corrugated plate fixture and the large corrugated hole is 30mm. A scale line is provided at the lower end of the other end of the first corrugated plate fixture. The distances from the two ends of the scale line to the center line of the large corrugated hole are 170mm and 240mm, respectively. The scale interval of the scale line is 1mm. The second corrugated plate fixture includes scale lines and small corrugated holes. The second corrugated plate fixture is pistol-shaped. A small corrugated hole is provided at the lower part of one end of the second corrugated plate fixture. The small corrugated hole matches the outer shape of the small corrugations on the corrugated plate. The distance between one end of the second corrugated plate fixture and the small corrugated hole is 40mm. A scale line is provided at the lower end of the other end of the second corrugated plate fixture. The distances from the two ends of the scale line to the center line of the small corrugated hole are 170mm and 240mm, respectively. The scale interval of the scale line is 1mm. The marking of the corrugated plate installation line is as follows: S41, When marking the corrugated plate installation line of the large corrugated plate in the width direction of the corrugated plate, the first corrugated plate fixture is used, the large corrugated hole on the first corrugated plate fixture is installed on the large corrugation, the scale line faces the outside of the corrugated plate, and the corresponding size is found on the scale line of the first corrugated plate fixture according to the size of each corrugated plate installation line to mark the corrugated plate installation line. S42, When marking the corrugated plate installation line of the large corrugated plate in the length direction of the corrugated plate, use the second corrugated plate fixture, install the small corrugated holes on the second corrugated plate fixture on the small corrugations, with the scale line facing the outside of the corrugated plate, and find the corresponding size on the scale line of the second corrugated plate fixture according to the size of each corrugated plate installation line to mark the corrugated plate installation line. S43, after the installation lines on the corrugated plates installed on the cargo hold deck are marked, the installation lines on the corrugated plates are aligned with the corrugated plate installation grid lines and then welded together. This process is repeated to complete the installation, welding and fixing of all the corrugated plates.

2. The installation method for corrugated plates in a MARKIII type enclosure system according to claim 1, characterized in that, The central axis marking on the insulation module of each cargo hold surface is specifically as follows: the punch points of R1 and R2 on the bulkhead are returned to the corresponding cargo hold insulation module, and the punch points of R1 and R2 are connected by ink lines to form central axes R1 and R2 on each cargo hold surface. The central axes R1 and R2 on each cargo hold surface form a longitudinal direction loop, a transverse direction loop, and a horizontal direction loop.

3. The installation method for corrugated plates in a MARKIII type enclosure system according to claim 2, characterized in that, The theoretical tolerance between the longitudinal, transverse, and horizontal rings and the center line of the corresponding anchoring strip is ±2mm.

4. The installation method for corrugated plates in a MARKIII type enclosure system according to claim 1, characterized in that, The specific steps for marking the corrugated plate installation grid lines are as follows: Based on the dimensions of the corrugated plates installed on each cargo hold deck, along the directions of the central axes R1 and R2 on the cargo hold deck, use steel needles to mark the grid points at the four corners of the corrugated plates according to the distances of the four corners of the installed corrugated plates from the central axes R1 and R2, thus determining the installation position of the corrugated plates. Then, connect the corrugated plate grid points marked by the steel needles in the horizontal and vertical directions using ink lines to form the corrugated plate installation grid lines.

5. The method for installing corrugated plates for a MARKIII type enclosure system according to claim 4, characterized in that, After the corrugated plate installation grid lines are drawn, error detection is performed on the corrugated plate installation grid lines. Specifically, the dimensions of the two diagonals of each grid are measured and the difference between the two diagonals is compared. When the difference between the two diagonals of each grid exceeds 2mm, the grid points of the corresponding grid are re-determined and drawn.

6. The method for installing corrugated plates for a MARKIII type enclosure system according to claim 1, characterized in that, The dihedral angle of the cargo hold is the included angle between two adjacent cargo hold surfaces, with included angles of 90° and 135°; the corrugated plate boundary line at the dihedral angle of the cargo hold is specifically drawn as follows: S31, when the included angle of the dihedral angle of the cargo hold is 90°, mark the fixed points on the cargo hold surface every meter on both sides of the dihedral angle of the cargo hold surface, and then connect the fixed points marked on each cargo hold surface with straight lines using ink lines to form the corrugated plate boundary line. The distance between the corrugated plate boundary line and the dihedral angle of the cargo hold surface is 165mm, and the error dimension of the corrugated plate boundary line is -8-10mm. S32, when the included angle of the dihedral angle of the cargo hold is 135°, mark the positioning points on the cargo hold surface on both sides of the dihedral angle of the cargo hold surface at intervals of one meter, and then connect the positioning points marked on each cargo hold surface with straight lines using ink lines to form the corrugated plate boundary line. The distance between the corrugated plate boundary line and the dihedral angle of the cargo hold surface is 88mm, and the error dimension of the corrugated plate boundary line is -5-15mm; complete the marking of all corrugated plate boundary lines for each cargo hold surface.

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