Container ship cargo hold cushion plate taper angle piece block stage installation precision control method

Abstract

The invention relates to a container ship cargo hold cushion plate cone angle piece block stage installation precision control method, in particular to an installation precision control method for forward moving installation construction of a parallel body cargo hold area in-cabin cushion plate cone angle piece to the block stage so as to ensure that the in-cabin cushion plate cone angle piece can be rapidly and accurately installed in place. 5-10 mm reversible deformation adding devices for preventing the block from sinking are arranged at steps on the two sides of the block; performing three-dimensional precision measurement on the block, and drawing a reference network line on the block; inside and outside data measurement is carried out on a guide rail of a transverse bulkhead block carried by the outsole block, and recording is carried out; and measuring to obtain base plate horizontal data of the outsole block, carrying out simulation data carrying on the base plate horizontal data and the subsequently carried outsole block, reinstalling the corrected taper angle piece which does not meet the data requirement, carrying out nail welding, and carrying out data confirmation until the data requirement is met. According to the invention, the problems that the taper angle piece on the in-cabin backing plate can be installed and positioned only after the whole cabin is formed and welded, and in-cabin data measurement needs to be carried out for many times are solved.

Description

Technical Field

[0001] The invention belongs to the field of design and construction of marine container ships, and in particular relates to a method for controlling the installation accuracy of cone-angle parts of cargo hold pads of container ships in the overall stage. Background Art

[0002] After the whole cargo hold of the container ship is welded, it is necessary to mark and install the cone-angle parts of the whole cabin pad. In the past, during the marking and installation of the cone-angle parts at the bottom of the container ship, it was necessary to wait until all the sections involved in the whole cabin area were hoisted and the welding was completed before the various precision data in the cabin could be measured. The marking and installation of the cone-angle parts were carried out according to the measured data. There were many construction projects in the cabin, and the cross-operation phenomenon was particularly complicated, which seriously affected the precision measurement and the precision quality of the construction work in the cabin; there was a lot of preparation work before marking, and the guide rail data of the whole cabin needed to be re-measured. The construction personnel needed to use instruments to accurately locate the front and rear positions of the cone-angle parts of the whole cabin, and then measure the precision data of the guide rail, and mark the lines in combination with the method of pulling the dial ruler, and finally conduct secondary confirmation of the data and measure the horizontality of the pad. At present, during the precision construction process in container cabins, it is advocated to improve the efficiency and quality of construction operations, and at the same time, it is also to reduce the difficulty of construction and improve construction accuracy. In order to achieve this overall goal, it is necessary to change the previous construction methods, and combine the existing resources and process systems to make corresponding optimizations, which can fully realize the improvement of construction efficiency and quality; by using this method to carry out the installation precision construction of cone-angle parts, the construction efficiency and installation accuracy can be greatly improved, and the data of the parts that affect the installation of cone-angle parts in the overall section of the transverse bulkhead guide can be found in time, and the data can be adjusted and repaired in time, so that the installation process of the cone-angle parts can be moved forward to the overall section stage. Summary of the invention

[0003] In order to solve the above problems, the present invention provides a method for controlling the installation accuracy of the cone-angle parts of the cargo hold pads of container ships in the overall stage, and the technical solution adopted is: A method for controlling the installation accuracy of the cone-angle parts of the cargo hold pads of a container ship, wherein the specific operation is as follows: S1: Set 5-10mm anti-deformation relief on the steps on both sides of the total section to prevent the total section from sinking, and then weld the total section.

[0004] S2: After the large bottom section is welded, a laser total station is used to perform three-dimensional precision measurement of the section. The measurement points are the structural points at the transverse bulkhead position in the section, the plate openings at the bow and stern of the section, and the position points of the hull centerline. After the measurement, the measurement data is analyzed and adjusted using three-dimensional data analysis software. The data of each measurement point is adjusted to the tolerance range required by the design theory. The overall three-dimensional data status of the section can be accurately determined through the above measurement points.

[0005] S3: Based on the optimized data, use the laser total station to mark the reference network lines on the total section. The reference network lines include the hull centerline, the front and rear position reference lines of the total section, and the horizontal height reference line.

[0006] S4: Using a laser total station, with the hull centerline as the reference, measure the distance data from the hull centerline to the inside and outside of the guide rails of the transverse bulkhead section carried by the large bottom section, and make a record.

[0007] S5: On the bottom section, with the marked reference network line as the reference, mark the position lines of the cone-shaped parts in the cabin on the pads inside the bottom section. The front and rear position lines of the cone-shaped parts are marked with the bottom transverse reference line as the reference, and the inside and outside position lines of the cone-shaped parts are marked with the recorded median distance between the inside and outside of each guide rail of the transverse bulkhead section as the reference, to ensure that the inside and outside position lines of the cone-shaped parts correspond to the inside and outside of the guide rails one by one.

[0008] S6: The front and rear position lines and the inside and outside position lines of the cone-angle parts should form an intersection and be marked; according to the marked position lines of the cone-angle parts, install and weld the cone-angle parts; measure the data of the welded cone-angle parts to check whether the data meets the standard requirements.

[0009] S7: During the closing of the large bottom section, the oil block reference line marked in the dock is used as the reference for data measurement in the closing positioning. The front and rear reference network lines and the hull centerline that have been marked on the large bottom section are measured to ensure that they correspond to the oil block reference line in the dock; and 5-10mm anti-deformation is added on both sides of the large bottom section; the horizontal height reference line on the large bottom section is measured to ensure that the front and rear and left and right horizontal height reference lines of the section are on the same horizontal plane.

[0010] S8: During the closing and positioning process of the transverse bulkhead section, the verticality, elevation points and hull centerline of the guide rail of the transverse bulkhead section are measured based on the transverse front and rear reference grid lines of the closed large bottom section and the hull centerline. The data must match the transverse front and rear reference grid lines of the large bottom section and the hull centerline; and the lowest connecting plates of the guide rails on both sides and the center are selected in turn, and their inside and outside data are measured to check whether they match the cone-shaped parts pre-installed on the large bottom section.

[0011] S9: After the entire cabin is formed and welded, the data of the conical parts in the cabin are re-measured. The re-measured data include the front and rear and inside and outside position data of the conical parts, the matching data between the conical parts and the guide rails, and the horizontality data of the pads. Check whether the data meets the design tolerance requirements, and make adjustments if they do not meet the design tolerance data requirements.

[0012] This precision control method solves the problem that the tapered parts on the cabin pads must be installed and positioned after the entire cabin is formed and welded, and multiple cabin data measurements are required. It also solves the problem of marking and installing the tapered parts after they are closed and formed, when the cross construction in the entire cabin is seriously affected. When implementing this method, 5-10mm anti-deformation should be set on both sides of the parallel body large bottom section in advance during the assembly process to prevent the section from sinking. After three-dimensional precision measurement after welding, the reference network line should be drawn on the section, and the guide rail of the transverse bulkhead section involved should be measured from the median value. The specific position line of the pad cone angle piece should be drawn based on the reference network line and the guide rail data of the measured transverse bulkhead section. In terms of data, the requirements of the test box in the cabin for the inside and outside data should be guaranteed first. Considering the horizontality data of the pad, the cone angle piece should be installed and welded according to the drawn position line. When the large bottom section is closed and positioned, the actual position of the installed pad cone angle piece should be used as the reference for closing and positioning in the dock. Similarly, the transverse bulkhead section is also closed and positioned based on this reference, and appropriate anti-deformation should be added to ensure that all data of the pad cone angle piece meet the design tolerance requirements after the whole cabin is formed and welded. BRIEF DESCRIPTION OF THE DRAWINGS

[0013] Figure 1 It is a construction flow chart of the present invention.

[0014] Figure 2 It is a schematic diagram of measuring the total section of the large bottom of the present invention.

[0015] Figure 3 It is a schematic diagram of the reference network line of the present invention.

[0016] Figure 4 It is a schematic diagram of measuring the total section of the transverse bulkhead of the present invention.

[0017] Figure 5 It is a schematic diagram of a guide rail of the present invention.

[0018] Figure 6 It is a schematic diagram of drawing and installing the construction cone angle parts of the present invention.

[0019] Figure 7 It is a diagram showing the closing and positioning effect of the outsole total section of the present invention.

[0020] Figure 8 It is a schematic diagram of deformation and expansion of the large bottom section of the present invention.

[0021] Fig. 9 , Fig.10 This is a control diagram of the closing positioning accuracy of the transverse bulkhead total section of the present invention. DETAILED DESCRIPTION

[0022] The present invention will be further described in conjunction with the accompanying drawings.

[0023] A method for controlling the installation accuracy of the cone angle parts of the cargo hold pads of a container ship is used in the actual application of a container ship. Figure 1 As shown, the cargo hold bottom section site assembly, after the section welding, the laser total station is used to measure the overall three-dimensional accuracy of the total section, and the analysis software (ECO-block) is used to analyze the measurement data. The total section reference network line is drawn according to the analyzed data. The reference network line includes the hull centerline, the front and rear position reference line of the closing, and the height waterline. The software (ECO-OTS) is used to simulate the loading of the total section to pre-judge the data status of the actual ship closing. The median value of the inner side distance of the transverse bulkhead total section guide and the front and rear data of the guide are measured in three dimensions. Based on the already marked reference network line as the reference, the position line of the pad plate cone angle piece is drawn. The cone angle piece is installed according to the position line, and the installed cone angle piece is measured by the total station, and the data is checked to confirm the installation accuracy of the cone angle piece. The actual closing positioning of the total section is controlled by the accuracy. During the construction process, 5-10mm is preset to prevent the total section from sinking and anti-deformation is added. After the whole cabin is welded, the data of the tapered parts in the cabin are re-measured. The re-measured data include the front and rear and inside and outside position data of the tapered parts, the matching data between the tapered parts and the guide rails, and the horizontality data of the pads. Those that do not meet the design data requirements are repaired.

[0024] In specific implementation, Figure 2 As shown, after the outsole overall section is formed and welded, the overall section is subjected to three-dimensional precision measurement, and the precision data of the overall section is analyzed using three-dimensional precision data analysis software (ECO-block), and the data of each measuring position point is optimized and adjusted to ensure that the three-dimensional data of each measured point is in the best data state within the design tolerance range.

[0025] like Figure 3 As shown, according to the optimized measurement data, the laser total station is used to survey and mark the reference network lines at various positions of the bottom section. The network lines include the hull centerline, front and rear reference network lines and height waterline, and they are marked.

[0026] like Figure 4 As shown in the figure, the lowest connecting plate (such as Figure 5 Measure the median distance between the inside and outside of the guide angle steel (as shown) and record the data.

[0027] like Figure 6 As shown, according to the already drawn reference network line and the median value of the transverse bulkhead guide rail, the position line of the cone-angle piece is drawn at the position of the large bottom section pad, and the foreign punch mark is made. The position line should form an intersection; according to the already drawn position line, the cone-angle piece is installed and nailed and welded; the nailed and welded cone-angle piece is measured with a laser total station, the data is checked, and the installation accuracy of the cone-angle piece is confirmed.

[0028] like Figure 7 ,8 As shown, during the closing and positioning of the large bottom section, the reference network lines that have been marked on the large bottom section are measured with the oil block reference line in the dock as the reference, the spacing between the transverse network line and the oil block reference line in the dock, the coplanarity of the transverse reference network line, the degree of coincidence between the hull centerline of the large bottom section and the oil block reference line (center) in the dock, and the height waterline on both sides of the large bottom section to ensure that the waterline is completely on the same height horizontal plane. 5-10mm anti-deformation is set on both sides of the section to prevent the sinking of the section, to prevent the subsequent loading of the section from causing the large bottom section to sink and deform, affecting the integrity of the overall precision data.

[0029] like Fig. 9 As shown, during the closing and positioning process of the transverse bulkhead section, the transverse front and rear reference grid lines of the large bottom section that has been closed and the hull centerline are used as references to measure the front and rear guide surface, waterline and hull centerline of the transverse bulkhead section, and the data should match the transverse front and rear reference grid lines of the large bottom section and the hull centerline.

[0030] like Fig.10 As shown, select the lowest connecting plates of the guide rails on both sides and the center in turn, measure their inside and outside data, and check whether they match the conical parts pre-installed on the large bottom section.

[0031] According to the above method steps, a method for closing and positioning the large bottom section and the transverse bulkhead section is finally formed. The transverse bulkhead section is subsequently sealed using a connecting walkway, and anti-deformation release in the front and rear directions is performed to ensure that the data changes generated after the forming welding of the entire cabin are within the tolerance range.

Claims

1. A method for controlling the installation accuracy of the cone-angle parts of the cargo hold pads of a container ship, characterized in that: The specific operations are: S1: Set 5-10mm anti-deformation relief at the steps on both sides of the total section to prevent the total section from sinking, and then weld the total section; S2: After the forming welding of the large bottom block, the laser total station is used to measure the block with three-dimensional precision. The measurement points are the structural points at the transverse bulkhead position in the block, the plate openings at the bow and stern of the block, and the position points of the hull centerline. After the measurement, the measurement data is analyzed and adjusted using three-dimensional data analysis software. The data of each measurement point is adjusted to the tolerance range required by the design theory. The overall three-dimensional data status of the block can be accurately judged through the above measurement points; S3: Based on the optimized data, use the laser total station to mark the reference network lines on the total section. The reference network lines include the hull centerline, the front and rear position reference lines of the total section, and the horizontal height reference line; S4: Using a laser total station, take the hull centerline as the reference, measure the distance data from the hull centerline to the inside and outside of the guide rails of the transverse bulkhead section carried by the large bottom section, and make a record; S5: On the bottom section, the position lines of the cone-shaped parts in the cabin are marked on the pads in the bottom section with the marked reference network lines as the reference. The front and rear position lines of the cone-shaped parts are marked with the bottom transverse reference line as the reference, and the inside and outside position lines of the cone-shaped parts are marked with the recorded median distance between the inside and outside of each guide rail of the transverse bulkhead section as the reference, to ensure that the inside and outside position lines of the cone-shaped parts correspond to the inside and outside of the guide rails one by one; S6: The front and rear position lines of the cone-angle parts and the inside and outside position lines should form an intersection and be marked; according to the marked position lines of the cone-angle parts, the cone-angle parts should be installed and nailed; Measure the data of the welded cone-angle parts to check whether the data meets the standard requirements; S7: During the closing of the large bottom section, the oil block reference line marked in the dock is used as the reference for data measurement in the closing positioning. The front and rear reference network lines and the hull centerline marked on the large bottom section are measured to ensure that they correspond to the oil block reference line in the dock; and 5-10mm anti-deformation is added on both sides of the large bottom section; the horizontal height reference line on the large bottom section is measured to ensure that the front and rear and left and right horizontal height reference lines of the section are on the same horizontal plane; S8: During the closing and positioning process of the transverse bulkhead section, the verticality, elevation points and hull centerline of the guide rail of the transverse bulkhead section are measured with the transverse front and rear reference grid lines of the closed large bottom section and the hull centerline as the reference. The data should match the transverse front and rear reference grid lines of the large bottom section and the hull centerline; and the lowest connecting plates of the guide rails on both sides and the center are selected in turn, and their inside and outside data are measured to check whether they match the cone-shaped parts pre-installed on the large bottom section; S9: After the entire cabin is formed and welded, the data of the conical parts in the cabin are re-measured. The re-measured data include the front and rear and inside and outside position data of the conical parts, the matching data between the conical parts and the guide rails, and the horizontality data of the pads. Check whether the data meets the design tolerance requirements, and make adjustments if they do not meet the design tolerance data requirements.

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