A method for rapid mounting and positioning of lashing bridges on large container ships

Abstract

This invention discloses a method for rapid mounting and positioning of lashing bridges on large container ships, comprising the following steps: Step 1: After the lashing bridge assembly is completed, the three-dimensional data of the lashing bridge is measured, and the positioning reference point of the lashing bridge is reversed to the lower end L of each column of the lashing bridge based on the overall three-dimensional data of the lashing bridge; Step 2: The data of the positioning reference point and the lower end face of the lashing bridge are measured and recorded as mounting data D; Step 3: The mounting position of the lashing bridge on the ship is confirmed according to the ship's centerline, and the positioning line is drawn and the positioning support is set; Step 4: The data of the mounting position of the lashing bridge on the ship is measured and recorded as reference data J; Step 5: The two sets of data D and J are simulated and analyzed using OTS software to calculate the mounting allowance of the lashing bridge; Step 6: The allowance is trimmed; Step 7: The lashing bridge is mounted and positioned. This invention not only allows all the mounting allowance of the lashing bridge to be trimmed before hoisting, but also achieves rapid and accurate positioning during the hoisting and positioning process.

Description

Technical Field

[0001] This invention belongs to the field of shipbuilding technology, specifically relating to a method for the rapid mounting and positioning of lashing bridges on large container ships. Background Technology

[0002] With the development of international shipping, the trend of container ship construction is becoming increasingly large. Ultra-large container ships inevitably require ultra-large lashing bridges. For example, the world's largest 24,000 TEU ship has a total of 27 lashing bridges, and the installation of these bridges requires a 600T crane. Due to the structural limitations of the lashing bridges, the setup and adjustment time is relatively long, resulting in a significant consumption of crane resources. Currently, the 24,000 TEU ship has a maximum stacking height of 25 layers, comparable to a 25-story building. This places even higher demands on the positioning of the lashing bridges. The ability to quickly and accurately position the lashing bridges directly impacts the utilization of crane resources and the dry dock cycle, and even more importantly, the smooth progress of subsequent stacking and lashing tests. Therefore, it is an extremely crucial task. Summary of the Invention

[0003] In response to the problems existing in the prior art and the high precision technical requirements for lashing bridges, this invention provides a method for rapid mounting and positioning of lashing bridges on large container ships. The aim is to solve the drawbacks of the previous complex and cumbersome positioning process and operation in complex environments, and improve the efficiency and accuracy of lashing bridge mounting and positioning.

[0004] To achieve the above objectives, the present invention adopts the following technical solution:

[0005] A method for rapidly mounting and positioning lashing bridges on large container ships includes the following steps:

[0006] Step 1: After the bridge assembly is completed, use measuring instruments to perform three-dimensional measurement of the bridge. Through three-dimensional analysis, the positioning reference point of the bridge is reversed to a distance L from the bottom of each column of the bridge. Point L is the same height position of each column. The positioning reference point includes the center line of the column and the height reference point.

[0007] Step 2: Using the positioning reference point as a reference, measure the actual data of the tying bridge, and compare the actual data of the tying bridge with the design data to obtain the deviation data of the tying bridge. Record the deviation data of the tying bridge as the mounting data D.

[0008] Step 3: Based on the punch marks made according to the design drawings during the hull sectioning stage, draw the positioning lines in the compartments and set the positioning mooring according to the positioning lines;

[0009] Step 4: Use measuring instruments to measure the data of the mounting position of the lashing bridge on the ship, and record this data as the baseline data J;

[0010] Step 5: Import the payload data D and the reference data J into the OTS software for simulation. Generate the simulated lashing bridge and simulated compartment sections based on the payload data D and the reference data J. Adjust the position of the simulated lashing bridge in the OTS software until the deviation between the simulated lashing bridge column and the positioning line is minimized. At this point, the position of the simulated lashing bridge is the final positioning position of the lashing bridge.

[0011] Step 6: Based on the final positioning of the tying bridge obtained from the simulation, determine the trimming allowance of the tying bridge, and then trim the tying bridge according to the allowance.

[0012] Step 7: After trimming, secure and position the bridge.

[0013] Furthermore, in step two, the actual data of the tying bridge includes the actual height and the actual horizontal distance. The actual height is the height from the height reference point to the bottom of the tying bridge column where it is located. The actual horizontal distance is the horizontal distance from the center line of the column to the edge of the tying bridge column where it is located. The actual horizontal distance includes the distance from the center line of the column to the front end, back end, left end and right end of the tying bridge column where it is located.

[0014] Furthermore, in step two, the bridge tying deviation data includes bridge height deviation and bridge horizontal deviation. Bridge height deviation refers to the deviation between the actual height and the design height, and bridge horizontal deviation refers to the deviation between the actual horizontal distance and the design horizontal distance, including horizontal distance deviations in the four directions of front, back, left, and right.

[0015] Furthermore, in step four, the method for measuring the data of the lashing bridge's mounting position on the ship is as follows: using measuring instruments to measure the actual data of each positioning line, and comparing the actual data with the design data to obtain the positioning line deviation data. The positioning line deviation data is the data of the lashing bridge's mounting position on the ship. The positioning line deviation data includes the positioning line height deviation and the positioning line horizontal deviation. The positioning line height deviation refers to the height difference between the plane where each positioning line is located and the ideal plane. The positioning line horizontal deviation refers to the distance difference between each positioning line and the ideal positioning line in the four directions of front, back, left, and right. The ideal plane and the ideal positioning line are based on the design drawings.

[0016] Further, in step five, the method for determining the minimum deviation between the simulated lashing bridge column and the positioning line is as follows: Each time the simulated lashing bridge position is moved, the distances between the frontmost, rearmost, leftmost, and rightmost ends of each simulated lashing bridge column and the corresponding frontmost, rearmost, leftmost, and rightmost ends of the positioning line on the simulated compartment segment are recorded. Then, the data is spliced ​​together, and the spliced ​​distance data is recorded as simulated data. The state of the spliced ​​data is then analyzed. The height state includes the splicing height gap and overlap. The front-to-back and left-to-right states include front-to-back and left-to-right misalignment and overlap. By moving the simulated lashing bridge position, the optimal mounting state of the simulated lashing bridge is obtained, including the minimum simulated height and the minimum simulated distance, thereby determining the minimum deviation between the simulated lashing bridge column and the positioning line.

[0017] Furthermore, in step six, the error of the trimming allowance is controlled within 5mm.

[0018] Furthermore, in step seven, the positioning of the tying bridge includes the following steps: according to the final positioning position of the tying bridge determined in step five, the tying bridge is hoisted to that position, and the positioning in the front, back, left, and right directions is achieved by using the mountain and the center line of the column. Then, the height of the tying bridge is adjusted according to the height reference point, and the verticality of the tying bridge is checked to ensure that it meets the design requirements, thus completing the positioning.

[0019] Furthermore, the tolerance for the verticality of the ties is no more than 15mm.

[0020] Compared with the prior art, the present invention has the following technical effects: the rigging allowance of the bridge can be completed before hoisting, and through scientific management methods and precision management theory, and modern measuring instruments, the rigging allowance of the bridge can be determined in advance, so as to achieve the optimal mounting state of the bridge and achieve the purpose of rapid and accurate positioning. Attached Figure Description

[0021] To more clearly illustrate the technical solutions in the embodiments of the present invention or the prior art, the drawings used in the description of the embodiments or the prior art will be briefly introduced below. Obviously, the drawings described below are only some embodiments of the present invention. For those skilled in the art, other drawings can be obtained based on these drawings without creative effort.

[0022] Figure 1 Diagram showing the relationship between the lashing bridge and the bulkhead.

[0023] Figure 2 A schematic diagram of the positioning reference points for the tying bridge.

[0024] Figure 3 This is a schematic diagram of the bridge positioning lines and the mountain support line.

[0025] The specific explanations of the attached diagram labels are as follows: 1-lashing bridge, 2-compartment, 3-positioning reference point, 4-mountain line, 5-positioning line. Detailed Implementation

[0026] In the description of this invention, it should be understood that the terms "upper", "lower", "front", "rear", "left", "right", "vertical", "horizontal", "top", "bottom", "inner", "outer", etc., indicate the orientation or positional relationship based on the orientation or positional relationship shown in the accompanying drawings. They are only for the convenience of describing this invention and simplifying the description, and do not indicate or imply that the device or element referred to must have a specific orientation, or be constructed and operated in a specific orientation. Therefore, they should not be construed as limitations on this invention.

[0027] This invention combines previous methods of bridge mounting and positioning with precision management control methods and modern measuring instruments. It aims to solve the problems of the complex and cumbersome positioning process and the need to operate in complex environments by proposing a fast and accurate positioning method to improve the efficiency of bridge mounting and positioning, shorten the construction cycle, and meet extremely high binding requirements.

[0028] This embodiment provides a method for quickly mounting and positioning the lashing bridge of a large container ship, including the following steps:

[0029] like Figure 1 As shown, a method for quickly mounting and positioning a large container ship's lashing bridge includes the following steps:

[0030] like Figure 2 As shown, after the completion of the first step of binding bridge 1, the binding bridge is measured in three dimensions using a measuring instrument. Through three-dimensional analysis, the positioning reference point 3 of the binding bridge is reversed to a distance L from the lower end of each column of the binding bridge 1. The distance L is the same height position of each column. The positioning reference point 3 includes the center line of the column and the height reference point.

[0031] Step 2: Using the positioning reference point 3 as the reference, measure the actual data of the binding bridge 1, and compare the actual data of the binding bridge 1 with the design data to obtain the binding bridge deviation data. Record the binding bridge deviation data as the mounting data D.

[0032] like Figure 3 As shown, in step three, according to the punch marks made in the design drawings during the hull sectioning stage, draw each positioning line 5 on the compartment 2, and set the positioning abutment according to the positioning line 5. The positioning abutment can be set by drawing the abutment line 4 on the compartment 2 according to the positioning line 5, and then fixing the edge of the positioning abutment tightly against the abutment line 4.

[0033] Step 4: Use measuring instruments to measure the data of the mounting position of the lashing bridge 1 on the ship, and record this data as the baseline data J;

[0034] Step 5: Import the payload data D and reference data J into the OTS software for simulation. Generate the simulated lashing bridge and simulated compartment segments based on the payload data D and reference data J. Adjust the position of the simulated lashing bridge in the OTS software until the deviation between the simulated lashing bridge column and the positioning line 5 is minimized. At this point, the position of the simulated lashing bridge is the final positioning position of the lashing bridge 1.

[0035] Step 6: Based on the final positioning of the tying bridge 1, determine the trimming allowance of the tying bridge 1, and then trim the tying bridge 1 according to the allowance.

[0036] Step 7: After trimming, position and install the tying bridge 1. When hoisting the tying bridge 1, place the lower support column of the tying bridge 1 against the pre-set support. Use the relationship between the positioning reference point 3 on the column and the positioning line 5 to confirm the front-to-back and left-to-right positions of the tying bridge 1. Adjust the verticality of the tying bridge 1 using steel wire ropes to ensure it is within the required tolerance range. Adjust all positioning reference points 3 on the tying bridge columns to the same horizontal level to complete the installation and positioning of the entire tying bridge 1.

[0037] Furthermore, in step two, the actual data of the tying bridge 1 includes the actual height and the actual horizontal distance. The actual height is the height from the height reference point to the bottom of the column of the tying bridge 1 where it is located. The actual horizontal distance is the horizontal distance from the center line of the column to the edge of the column of the tying bridge 1 where it is located. The actual horizontal distance includes the distance from the center line of the column to the front end, back end, left end and right end of the column of the tying bridge 1 where it is located.

[0038] Furthermore, in step two, the bridge tying deviation data includes bridge height deviation and bridge horizontal deviation. Bridge height deviation refers to the deviation between the actual height and the design height, and bridge horizontal deviation refers to the deviation between the actual horizontal distance and the design horizontal distance, including horizontal distance deviations in the four directions of front, back, left, and right.

[0039] Further, in step four, the method for measuring the data of the mounting position of the lashing bridge 1 on the ship is to use a measuring instrument to measure the actual data of each positioning line 5, and compare the actual data with the design data to obtain the positioning line deviation data. The positioning line deviation data is the data of the mounting position of the lashing bridge 1 on the ship. The positioning line deviation data includes the positioning line height deviation and the positioning line horizontal deviation. The positioning line height deviation refers to the height difference between the plane where each positioning line 5 is located and the ideal plane. The positioning line horizontal deviation refers to the distance difference between each positioning line 5 and the ideal positioning line in the four directions of front, back, left, and right. The ideal plane and the ideal positioning line are based on the design drawings.

[0040] Further, in step five, the method for determining the minimum deviation between the simulated lashing bridge column and positioning line 5 is as follows: Each time the simulated lashing bridge position is moved, the distances between the frontmost, rearmost, leftmost, and rightmost ends of each simulated lashing bridge column and the corresponding frontmost, rearmost, leftmost, and rightmost ends of the positioning lines on the simulated compartment segment are recorded. Then, the columns are spliced ​​together, and the spliced ​​distance data is recorded as simulated data. The state of the spliced ​​data is then analyzed. The height state includes the splicing height gap and overlap. The front-to-back and left-to-right states include front-to-back and left-to-right misalignment and overlap. By moving the simulated lashing bridge position, the optimal mounting state of the simulated lashing bridge is obtained, including the minimum simulated height and minimum simulated distance, thereby determining the minimum deviation between the simulated lashing bridge column and positioning line 5.

[0041] Furthermore, in step six, the error of the trimming allowance is controlled within 5mm.

[0042] Furthermore, in step seven, the positioning of the tying bridge 1 includes the following steps: according to the final positioning position of the tying bridge 1 determined in step five, the tying bridge 1 is hoisted to that position, and the positioning in the front, back, left, and right directions is achieved by positioning the backrest and the center line of the column. Then, the height of the tying bridge 1 is adjusted according to the height reference point, and the verticality of the tying bridge 1 is checked to ensure that it meets the design requirements, thus completing the positioning.

[0043] Furthermore, the tolerance for the verticality of the ties is no more than 15mm.

[0044] Although the above embodiments have provided a detailed description of the present invention, it should be understood by those skilled in the art that modifications or improvements can be made based on the disclosure of the present invention without departing from the spirit and scope of the invention, and such modifications and improvements are all within the spirit and scope of the present invention.

Claims

1. A method for rapid mounting and positioning of lashing bridges on large container ships, characterized in that, Includes the following steps: Step 1: After the bridge assembly is completed, use measuring instruments to perform three-dimensional measurement of the bridge. Through three-dimensional analysis, the positioning reference point of the bridge is reversed to a distance L from the bottom of each column of the bridge. Point L is the same height position of each column. The positioning reference point includes the center line of the column and the height reference point. Step 2: Using the positioning reference point as a reference, measure the actual data of the tying bridge, and compare the actual data of the tying bridge with the design data to obtain the deviation data of the tying bridge. Record the deviation data of the tying bridge as the mounting data D. Step 3: Based on the punch marks made according to the design drawings during the hull sectioning stage, draw the positioning lines in the compartments and set the positioning mooring according to the positioning lines; Step 4: Use measuring instruments to measure the data of the mounting position of the lashing bridge on the ship, and record this data as the baseline data J; Step 5: Import the payload data D and the reference data J into the OTS software for simulation. Generate the simulated lashing bridge and simulated compartment sections based on the payload data D and the reference data J. Adjust the position of the simulated lashing bridge in the OTS software until the deviation between the simulated lashing bridge column and the positioning line is minimized. At this point, the position of the simulated lashing bridge is the final positioning position of the lashing bridge. Step 6: Based on the final positioning of the tying bridge obtained from the simulation, determine the trimming allowance of the tying bridge, and then trim the tying bridge according to the allowance. Step 7: After the trimming is completed, the bridge is tied and positioned.

2. The method for rapid mounting and positioning of lashing bridges on large container ships according to claim 1, characterized in that, In step two, the actual data of the tying bridge includes the actual height and the actual horizontal distance. The actual height is the height from the height reference point to the bottom of the tying bridge column where it is located. The actual horizontal distance is the horizontal distance from the center line of the column to the edge of the tying bridge column where it is located. The actual horizontal distance includes the distance from the center line of the column to the front end, back end, left end and right end of the tying bridge column where it is located.

3. The method for rapid mounting and positioning of a large container ship lashing bridge according to claim 2, characterized in that, In step two, the bridge tying deviation data includes bridge height deviation and bridge horizontal deviation. Bridge height deviation refers to the deviation between the actual height and the design height, and bridge horizontal deviation refers to the deviation between the actual horizontal distance and the design horizontal distance, including horizontal distance deviations in the four directions of front, back, left, and right.

4. The method for rapid mounting and positioning of a large container ship lashing bridge according to claim 1, characterized in that, In step four, the method for measuring the mounting position of the lashing bridge on the ship is as follows: the actual data of each positioning line is measured using a measuring instrument, and the actual data is compared with the design data to obtain the positioning line deviation data. The positioning line deviation data is the data of the mounting position of the lashing bridge on the ship. The positioning line deviation data includes the positioning line height deviation and the positioning line horizontal deviation. The positioning line height deviation refers to the height difference between the plane where each positioning line is located and the theoretical plane. The positioning line horizontal deviation refers to the distance difference between each positioning line and the theoretical positioning line in the four directions of front, back, left, and right. The theoretical plane and theoretical positioning line are based on the design drawings.

5. The method for rapid mounting and positioning of lashing bridges on large container ships according to claim 1, characterized in that, In step five, the method for determining the minimum deviation between the simulated lashing bridge column and the positioning line is as follows: each time the simulated lashing bridge position is moved, the distances of the frontmost, rearmost, leftmost, and rightmost ends of each simulated lashing bridge column to the frontmost, rearmost, leftmost, and rightmost ends of the corresponding positioning lines on the simulated compartment segment are recorded. Then, the columns are spliced ​​together, and the spliced ​​distance data is recorded as simulated data. At this time, the state of the spliced ​​data is analyzed. The height state includes the splicing height gap and overlap. The front-to-back and left-to-right states include front-to-back and left-to-right misalignment and overlap. By moving the simulated lashing bridge position, the optimal mounting state of the simulated lashing bridge is obtained, including the minimum simulated height and the minimum simulated distance, thereby determining the minimum deviation between the simulated lashing bridge column and the positioning line.

6. The method for rapid mounting and positioning of lashing bridges on large container ships according to claim 1, characterized in that, In step six, the error of the trimming allowance is controlled within 5mm.

7. The method for rapid mounting and positioning of a large container ship lashing bridge according to claim 1, characterized in that, In step seven, the positioning of the tying bridge includes the following steps: according to the final positioning position of the tying bridge determined in step five, the tying bridge is hoisted to that position, and the positioning in the front, back, left and right directions is achieved by using the mountain and the center line of the column. Then, the height of the tying bridge is adjusted according to the height reference point, and the verticality of the tying bridge is checked to ensure that it meets the design requirements, thus completing the positioning.

8. A method for rapid mounting and positioning of a large container ship lashing bridge according to claim 7, characterized in that, The tolerance for the verticality of the ties is no more than 15mm.

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