A method for installing a support plate and guide rail of a lifting fin of a research vessel

Abstract

The application provides a mounting method for a research ship lifting fin support plate and guide rail, comprising the following steps: marking according to the design position of the lifting fin support plate; checking the mounting precision of the lifting fin support plate after spot welding of the lifting fin support plate is completed; arranging first positioning tools and second positioning tools on the top and bottom of the lifting fin well; hoisting the guide rail into the lifting fin well and mounting the guide rail; arranging an adjusting mechanism on the lifting fin support plate close to each guide rail, adjusting the mounting position of the guide rail through the adjusting mechanism; and re-measuring the mounting precision of the guide rail. The application realizes low-stress and high-precision mounting of the lifting fin support plate and the guide rail, and ensures the mounting precision of the lifting fin support plate and the guide rail. The same reference surface is used for positioning and marking during mounting of the lifting fin support plate, so that the cumulative error is effectively reduced. Through the adjusting mechanism, the positioning tools and the measuring tools, precision adjustment can be realized during the mounting process, rework is reduced, construction efficiency is improved, and labor cost is reduced.

Description

Technical Field

[0001] This application relates to the field of shipbuilding technology, and more specifically, to a method for installing a lifting fin support plate and guide rail on a research vessel. Background Technology

[0002] Research vessels consist of lifting fin support plates and guide rails. In existing technology, when installing the lifting fin support plates, construction workers use the previous lifting fin support plate as the installation benchmark, leading to significant cumulative errors. Similarly, the guide rails are installed using the lifting fin support plate as the benchmark. Therefore, the current installation methods for lifting fin support plates and guide rails result in severe welding deformation of the bulkheads and lifting fin support plates, causing significant deviations in precision and rendering the lifting fins malfunctioning. Subsequent pyrotechnic adjustments require substantial time for correction, and may even necessitate the removal and reassembly of severely deformed lifting fin support plates and guide rails. This results in a large amount of on-site work, numerous rework sessions, and even the scrapping of lifting fin support plates and guide rails, leading to high material and labor costs.

[0003] In summary, there is a need to provide an improved technical solution that addresses the shortcomings of the existing technology. Summary of the Invention

[0004] The purpose of this application is to provide an installation method for the lifting fin support plate and guide rail of a research vessel, which can reduce welding deformation, control the precision throughout the process, ensure installation quality, and reduce labor costs.

[0005] This application specifically provides a method for installing a research vessel's lifting fin support plate and guide rail, including the following steps:

[0006] S1. Mark the lines according to the design position of the lifting fin support plate;

[0007] S2. After spot welding the lifting fin support plate, recheck the installation accuracy of the lifting fin support plate.

[0008] S3. Arrange a first positioning fixture and a second positioning fixture at the top of the lifting fin well, and arrange the first positioning fixture and the second positioning fixture at corresponding positions at the bottom of the lifting fin well. The first positioning fixture and the second positioning fixture are arranged vertically in the horizontal direction. After installation, ensure that the installation positions of the first positioning fixture and the second positioning fixture are accurate.

[0009] S4. Hoist the guide rail into the lifting fin well and install it, and set an adjustment mechanism on the lifting fin support plate near each guide rail to adjust the installation position of the guide rail.

[0010] S5. Re-measure the installation accuracy of the guide rail. After the installation accuracy of the guide rail meets the requirements, complete the installation of the lifting fin support plate and the guide rail.

[0011] In one feasible embodiment, a first marker point, a second marker point, and a third marker point are provided on the first positioning fixture, and a hole is drilled at each marker point; a fourth marker point, a fifth marker point, a sixth marker point, and a seventh marker point are provided on the second positioning fixture, and a hole is drilled at each marker point.

[0012] In step S3, determining the accurate installation positions of the first and second positioning fixtures after installation includes at least the following:

[0013] S31. The accuracy of multiple marker points of the first and second positioning fixtures is re-measured using a total station;

[0014] S32. Set a steel wire rope in each of the marked points on the first positioning fixture and the second positioning fixture respectively, and let each steel wire rope pass through the corresponding marked point on the first positioning fixture and the second positioning fixture in sequence; check the verticality of each steel wire rope.

[0015] In one feasible approach, step S4 further includes at least the following: determining that the straightness of the guide rail meets the requirements before hoisting the guide rail.

[0016] In one feasible embodiment, the adjusting mechanism includes: multiple sets of adjusting bolts and adjusting bolt fixing plates, wherein the adjusting bolt fixing plates are fixedly connected to the lifting fin support plate by spot welding, and the adjusting bolts are threadedly connected to the adjusting bolt fixing plates; the tail of the adjusting bolt abuts against the guide rail, and the position of the guide rail is adjusted by rotating the adjusting bolts.

[0017] In one feasible approach, after adjustment is completed, the adjusting bolt and the adjusting bolt fixing plate are fixed by spot welding, and the first positioning fixture and the second positioning fixture are removed.

[0018] In one implementable manner, step S1 further includes at least the following:

[0019] The upper surface of the outer plate at the bottom of the lifting fin manhole is selected as the first reference plane; based on the first reference plane, and with the help of a total station, the first lifting fin support plate and the second lifting fin support plate are accurately positioned and then marked.

[0020] The upper plane of the second lifting fin support plate is defined as the second reference plane, and the subsequent multiple lifting fin support plates are scribed based on the second reference plane.

[0021] In one feasible approach, when marking multiple lifting fin support plates in step S1, the markings are performed in a bottom-up order.

[0022] The accuracy requirement for the height of the scribing on the lifting fin support plate is ±1mm.

[0023] In one feasible approach, prior to step S1, the method further includes: determining the accuracy of the lifting fin cofferdam;

[0024] The length and width clearance error of the lifting fin cofferdam is determined to be within ±8mm, and the verticality of the bulkhead of the lifting fin cofferdam is within ±6mm.

[0025] In one feasible approach, both the first positioning fixture and the second positioning fixture are temporarily fixed to the inner wall of the scarf by spot welding.

[0026] In one feasible embodiment, the first positioning fixture is arranged along the length of the ship, and the second positioning fixture is arranged along the width of the ship; the centerline of the first positioning fixture is parallel to the centerline of the hull, and the distance between the centerline of the first positioning fixture and the centerline of the hull is a first distance A; the distance between the centerline of the second positioning fixture and the bow bulkhead is a second distance B.

[0027] Compared with the prior art, the beneficial effects of this application are as follows:

[0028] The technical solution of this application achieves low-stress, high-precision installation of the lifting fin support plate and guide rail, ensuring their installation accuracy. The same reference plane is used for positioning and marking during the installation of the lifting fin support plate, effectively reducing cumulative errors and guaranteeing installation accuracy. By adjusting the mechanism and combining positioning and measuring fixtures, precision adjustments can be made during installation while ensuring the guide rail's installation accuracy, reducing rework, improving construction efficiency, and lowering labor costs. Low-current, slow-speed welding is used during lifting fin support plate installation, effectively controlling welding deformation at the weld joints of the lifting fin cofferdam and the lifting fin support plate. Therefore, this application provides a theoretical basis for the installation of lifting fin support plates and guide rails on research vessels, effectively guiding their installation and facilitating widespread use. Attached Figure Description

[0029] Figure 1 This is a flowchart illustrating the installation method of the lifting fin support plate and guide rail of the research vessel according to an embodiment of the present invention.

[0030] Figure 2 This is a top view of the lifting fin cofferdam in the installation method of the lifting fin support plate and guide rail of the research vessel according to an embodiment of the present invention.

[0031] Figure 3 This is a front view of the lifting fin cofferdam in the installation method of the lifting fin support plate and guide rail of the research vessel according to an embodiment of the present invention.

[0032] Figure 4 This is a schematic diagram showing the scribing of the lifting fin support plate in the installation method of the lifting fin support plate and guide rail of the research vessel according to an embodiment of the present invention.

[0033] Figure 5 This is a schematic diagram of the structure of the first positioning fixture and the second positioning fixture in the installation method of the lifting fin support plate and guide rail of the research vessel according to an embodiment of the present invention.

[0034] Figure 6 This is a schematic diagram of the installation of the first positioning fixture and the second positioning fixture in the installation method of the lifting fin support plate and guide rail of the research vessel according to an embodiment of the present invention.

[0035] Figure 7 This is a schematic diagram of the guide rail arrangement structure on one side of the lifting fin in the installation method of the lifting fin support plate and guide rail of the research vessel according to an embodiment of the present invention.

[0036] Figure 8 This is a schematic diagram showing the arrangement of the adjustment mechanism in the installation method of the lifting fin support plate and guide rail of the research vessel according to an embodiment of the present invention.

[0037] Figure 9 This is a schematic diagram of the adjustment mechanism in the installation method of the lifting fin support plate and guide rail of the research vessel according to an embodiment of the present invention.

[0038] Figure 10 This is a schematic diagram of the guide rail adjustment structure in the installation method of the research vessel lifting fin support plate and guide rail according to an embodiment of the present invention.

[0039] Figure 11 This is a schematic diagram of the measuring fixture in the installation method of the lifting fin support plate and guide rail of the research vessel according to an embodiment of the present invention.

[0040] The reference numerals in the attached figures are explained as follows:

[0041] 1. Lifting fin support plate; 11. First lifting fin support plate; 12. Second lifting fin support plate; 13. First reference surface; 2. Guide rail; 21. First working part; 22. Second working part; 23. Third working part; 24. Working surface; 3. Lifting fin cofferdam; 41. First positioning fixture; 411. First marker point; 412. Second marker point; 413. Third marker point; 42. Second positioning fixture; 424. Fourth marker point; 425. Fifth marker point; 426. Sixth marker point; 427. Seventh marker point; 51. First measuring part; 52. Second measuring part; 6. Adjusting bolt; 7. Adjusting bolt fixing plate; 8. Hull centerline. Detailed Implementation

[0042] The specific embodiments of the present invention will be further described in detail below with reference to the accompanying drawings. These embodiments are for illustrative purposes only and are not intended to limit the scope of the invention.

[0043] In the description of this invention, it should be noted that the terms "center," "longitudinal," "lateral," "upper," "lower," "front," "rear," "left," "right," "vertical," "horizontal," "top," "bottom," "inner," and "outer," etc., indicate the orientation or positional relationship based on the orientation or positional relationship shown in the accompanying drawings. They are used only for the convenience of describing the invention and for 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 the invention. Furthermore, the terms "first" and "second" are used for descriptive purposes only and should not be construed as indicating or implying relative importance.

[0044] In the description of this invention, it should be noted that, unless otherwise explicitly specified and limited, the terms "installation," "connection," and "linking" should be interpreted broadly. For example, they can refer to a fixed connection, a detachable connection, or an integral connection; they can refer to a mechanical connection or an electrical connection; they can refer to a direct connection or an indirect connection through an intermediate medium; and they can refer to the internal connection of two components. Those skilled in the art can understand the specific meaning of the above terms in this invention according to the specific circumstances.

[0045] Furthermore, in the description of this invention, unless otherwise stated, "a plurality of" means two or more.

[0046] See Figures 1 to 11 This application specifically provides a method for installing a research vessel's lifting fin support plate and guide rail, including the following steps:

[0047] S1, such as Figure 4 As shown, lines are drawn according to the design position of the lifting fin support plate 1.

[0048] Specifically, before marking the lines, the upper surface of the bottom outer plate of the lifting fin manhole 3 is selected as the first reference plane 13. Based on the first reference plane 13, and with the help of a total station, the first lifting fin support plate 11 and the second lifting fin support plate 12 are accurately positioned before marking the lines. The upper surface of the second lifting fin support plate 12 is determined as the second reference plane, and the subsequent marking of multiple lifting fin support plates 1 is performed based on the second reference plane. Compared with the continuous marking method in the prior art, this application can avoid the accumulation of errors.

[0049] In one feasible approach, when marking multiple lifting fin support plates 1, the markings are performed in a bottom-up order.

[0050] In one feasible approach, when the lifting fin support plate 1 at the same height comprises multiple support plates, a level or other measuring tool is used for calibration to ensure that the multiple support plates have the same height, and then the support plates are fixed by spot welding.

[0051] It should be noted that the accuracy requirement for the height of the scribing on the lifting fin support plate 1 is ±1mm.

[0052] In one feasible approach, prior to step S1, the accuracy of the lifting fin well 3 is determined.

[0053] Specifically, such as Figure 2 and Figure 3 As shown, after the lifting fin cofferdam 3 is installed, the bulkhead is subjected to fire-based straightening to ensure that the length and width clearance error of the lifting fin cofferdam 3 is within ±8mm, and the verticality of the bulkhead is within ±6mm. The accuracy of the lifting fin cofferdam 3 is determined before the installation of the lifting fin support plate 1 and guide rail 2, as a prerequisite for subsequent high-precision construction.

[0054] S2. After spot welding of the lifting fin support plate 1 is completed, the installation accuracy of the lifting fin support plate 1 is checked again.

[0055] It should be noted that in step S3, carbon dioxide gas shielded welding is used for welding, the weld leg range is 4.0 to 5.0 mm, the current is 210 to 220 A, the voltage is 27 to 28 V, the welding speed is 45 to 47 cm / min, the accuracy requirement after welding is ±2 mm, and the accuracy tolerance of the lifting fin support plate after spot welding is ±1 mm.

[0056] S3, such as Figure 5 and Figure 6 As shown, a first positioning fixture 41 and a second positioning fixture 42 are arranged at the top of the lifting fin well 3, and at corresponding positions at the bottom of the lifting fin well 3. The first positioning fixture 41 and the second positioning fixture 42 are arranged vertically. After installation, it is confirmed that the installation positions of the first positioning fixture 41 and the second positioning fixture 42 are accurate.

[0057] Specifically, both the first positioning fixture 41 and the second positioning fixture 42 are channel steel, and the channel steel model is 20a.

[0058] It should be noted that both the first positioning fixture 41 and the second positioning fixture 42 are temporarily fixed to the inner wall of the hull by spot welding. The first positioning fixture 41 is arranged along the length of the ship, and the second positioning fixture 42 is arranged along the width of the ship. The centerline of the first positioning fixture 41 is parallel to the centerline 8 of the hull, and the distance between it and the centerline 8 is the first distance A. The distance between the centerline of the second positioning fixture 42 and the bow bulkhead is the second distance B.

[0059] In one feasible embodiment, a first positioning fixture 41 is provided with a first marking point 411, a second marking point 412 and a third marking point 413, and a hole with a diameter of 1 mm is drilled at each marking point.

[0060] It should be noted that the selection principle for the first marker point 411 and the second marker point 412 is to select the nearest one, and their positioning along the length of the ship does not exceed the range of the quadrilateral formed by the folding of the left guide rail 2.

[0061] The distance from the first marker point 411 to the stern elevating fin cofferdam 3 is the third distance C, and the distance between it and the ship's centerline 8 is the first distance A.

[0062] The distance from the second marker point 412 to the stern elevating fin cofferdam 3 is the fourth distance D, and the distance between it and the ship's centerline 8 is the first distance A.

[0063] The distance from the third marker point 413 to the side of the elevating fin cofferdam 3 near the bow is the fifth distance E, and the distance between it and the ship's centerline 8 is the first distance A.

[0064] The second positioning fixture 42 is equipped with a fourth marker point 424, a fifth marker point 425, a sixth marker point 426, and a seventh marker point 427, and a hole with a diameter of 1mm is drilled at each marker point.

[0065] The distance from the fourth marker point 424 to the bow fin cofferdam 3 is the sixth distance F, and the distance between it and the ship's centerline 8 is the seventh distance J.

[0066] The distance from the fifth marker point 425 to the bow fin cofferdam 3 is the eighth distance G, and the distance between it and the ship's centerline 8 is the ninth distance K.

[0067] The distance from the sixth marker point 426 to the bow fin cofferdam 3 is the tenth distance F, and the distance between it and the ship's centerline 8 is the eleventh distance I.

[0068] The seventh marker point 427 is twelfth distance G from the bow elevating fin cofferdam 3 and thirteenth distance H from the hull centerline 8.

[0069] In step S3, determining the accurate installation positions of the first positioning fixture 41 and the second positioning fixture 42 after installation includes at least the following:

[0070] S31. Use a total station to re-measure whether multiple marker points of the first positioning fixture 41 and the second positioning fixture 42 are accurate.

[0071] S32. Set steel wire ropes in each mark point on the first positioning fixture 41 and the second positioning fixture 42 respectively, and let each steel wire rope pass through the corresponding mark point on the first positioning fixture 41 and the second positioning fixture 42 in sequence; detect the verticality of each steel wire rope.

[0072] It should be noted that after the wire rope is inserted from the first positioning fixture 41 located at the top, it extends from the second positioning fixture 42, and a predetermined weight is placed at the bottom of each wire rope to make the wire rope taut under the constraint of the weight. The installation accuracy of the first positioning fixture 41 and the second positioning fixture 42 is checked again to confirm that the verticality of each wire rope meets the requirements, and then the wire rope is removed.

[0073] S4, such as Figure 7 As shown, the hoisting guide rail 2 is installed inside the lifting fin well 3, and an adjustment mechanism is set on the lifting fin support plate 1 near each guide rail 2 to adjust the installation position of the guide rail 2.

[0074] Step S4 also includes at least the following: before hoisting the guide rail 2, determining that the straightness of the guide rail 2 meets the requirements.

[0075] Specifically, the straightness of guide rail 2 is ±2mm / 3m. If the straightness requirement is not met, guide rail 2 needs to be adjusted until the requirement is met. Adjustment methods include cold working.

[0076] In one feasible approach, such as Figure 8 and Figure 9 As shown, the adjustment mechanism includes multiple sets of adjusting bolts 6 and adjusting bolt fixing plates 7. The adjusting bolt fixing plates 7 are fixedly connected to the lifting fin support plate 1 by spot welding, and the adjusting bolts 6 are threadedly connected to the adjusting bolt fixing plates 7. The tail of the adjusting bolt 6 abuts against the guide rail 2, and the position of the guide rail 2 is adjusted by rotating the adjusting bolt 6.

[0077] Specifically, the bolt and nut for adjusting bolt 6 are M16, and the nut is embedded in a 50mm high flat steel to ensure that the bolt can be adjusted normally.

[0078] It should be noted that the guide rail 2 comprises three sections along the vertical direction. Adjustment mechanisms are provided at the connection points of the top and bottom of each section of the guide rail 2 with the lifting fin support plate 1. The guide rail 2 includes a working surface 24 and a mounting surface, as shown below. Figure 8 As shown, the working surface 24 is located on the inner side of the guide rail 2, and the mounting surface is located on the outer side of the guide rail 2. Multiple sets of adjusting bolts 6 and adjusting bolt fixing plates 7 are all located on the periphery of the mounting surface of the guide rail 2.

[0079] In one feasible approach, step S4 further includes at least the following: after hoisting and installing the guide rail 2, steel wire ropes are reinstalled on the first positioning fixture 41 and the second positioning fixture 42; multiple measurement distances are determined based on the steel wire ropes, and it is determined that the multiple measurement distances meet the predetermined requirements; when the measurement distances do not meet the predetermined requirements, the position of the guide rail 2 is adjusted based on the measurement results through an adjustment mechanism until the multiple measurement distances all meet the predetermined requirements, thereby achieving precise control of the installation accuracy of the guide rail 2.

[0080] Specifically, determining multiple measurement distances includes the following:

[0081] Determine the vertical distance between each working surface of guide rail 2 and the corresponding side of the wire rope in sequence. For example... Figure 8 As shown, the guide rail 2 includes an L-shaped first working section 21, a second working section 22, and a third working section 23. (As...) Figure 8 As shown, the first working part 21 is located on the side away from the second positioning fixture 42, while the second working part 22 and the third working part 23 are located on the side closer to the second positioning fixture 42. The inner side of the first working part 21 includes a first working surface and a second working surface, which together form an L-shaped working surface 24. Figure 10 As shown, the vertical distances A1 and A2 between the first working surface and the first marker point 411 are obtained, and are confirmed to be equal. The vertical distances A3 and A4 between the first working surface and the second marker point 412 are also obtained, and are confirmed to be equal. The vertical distances B1 and B2 between the working surface of the second working part 22 and the fifth marker point 425 are also obtained, and are confirmed to be equal. The vertical distances B3 and B4 between the working surface of the third working part 23 and the seventh marker point 427 are also obtained, and are confirmed to be equal. The vertical distances B5 and B6 between the working surface of the second working part 22 and the fourth marker point 424 are also obtained, and are confirmed to be equal. The vertical distances between the working surface 24 of the third working section 23 and the sixth marker point 426 are B7 and B8, respectively, and it is determined that B7 and B8 are equal.

[0082] It should be noted that after the adjustment is completed, the adjusting bolt 6 and the adjusting bolt fixing plate 7 are fixed by spot welding, and the first positioning fixture 41 and the second positioning fixture 42 are removed.

[0083] S5. Re-measure the installation accuracy of guide rail 2. After the installation accuracy of guide rail 2 meets the requirements, complete the installation of lifting fin support plate 1 and guide rail 2.

[0084] Specifically, such as Figure 11As shown, a measuring fixture is used to measure the installation position of the guide rail 2 to obtain the installation accuracy of the guide rail 2. The measuring fixture includes a first measuring part 51 and a second measuring part 52. The first measuring part 51 is clamped in the working surface of the first working part 21, and the second measuring part 52 is clamped between the second working part 22 and the third working part 23.

[0085] like Figure 11 As shown, the first measuring unit 51 has a first measuring point, and the second measuring unit 52 includes a second measuring point and a third measuring point. The distance L1 between the first measuring point and the second measuring point, and the distance L2 between the first measuring point and the third measuring point are obtained by measuring fixtures. The tolerance requirement for L1 is ±2mm, the tolerance requirement for L2 is ±2mm, and |L1-L2|≤3mm.

[0086] Obtain the distance L between the first measuring unit 51 and the second measuring unit 52. The tolerance requirement for L is ±2mm.

[0087] After all the above measurement results meet the tolerance requirements, the guide rail 2 is welded to the lifting fin well 3.

[0088] It should be noted that when welding guide rail 2, carbon dioxide gas shielded welding is used, with a weld leg range of 4.0-5.0mm, a current of 210-220A, a voltage of 27-28V, and a welding speed of 45-47cm / min.

[0089] In one feasible manner, in step S4, when installing the guide rail 2, it is installed sequentially from bottom to top.

[0090] In one feasible approach, the measuring fixture and adjustment mechanism are removed before step S5.

[0091] In summary, this application provides an installation method for the lifting fin support plate 1 and guide rail 2 of a research vessel, achieving low-stress, high-precision installation of the lifting fin support plate 1 and guide rail 2, ensuring the installation accuracy of the lifting fin support plate 1 and guide rail 2. The same reference plane is used for positioning and marking during the installation of the lifting fin support plate 1, effectively reducing cumulative errors and ensuring the installation accuracy of the lifting fin support plate 1. By setting the adjustment mechanism and combining positioning and measuring fixtures, while ensuring the installation accuracy of the guide rail 2, precision adjustment can also be achieved during the installation process, reducing rework, improving construction efficiency, and lowering labor costs. Low current and slow welding are used during the installation of the lifting fin support plate 1, effectively controlling welding deformation of the bulkhead of the lifting fin cofferdam 3 and the weld joint of the lifting fin support plate 1. Therefore, this application provides a theoretical basis for the installation of the lifting fin support plate 1 and guide rail 2 of a research vessel, effectively guiding the installation of the lifting fin support plate 1 and guide rail 2 of a research vessel, and facilitating its widespread use.

[0092] The above description is only a preferred embodiment of the present invention. It should be noted that for those skilled in the art, several improvements and substitutions can be made without departing from the technical principles of the present invention, and these improvements and substitutions should also be considered within the scope of protection of the present invention.

Claims

1. A method for installing a lifting fin support plate and guide rail on a research vessel, characterized in that, Includes the following steps: S1. Mark the lines according to the design position of the lifting fin support plate; The upper surface of the outer plate at the bottom of the lifting fin manhole is selected as the first reference plane; based on the first reference plane, and with the help of a total station, the first lifting fin support plate and the second lifting fin support plate are accurately positioned and then marked. The upper plane of the second lifting fin support plate is defined as the second reference plane, and the subsequent multiple lifting fin support plates are scribed based on the second reference plane. S2. After spot welding the lifting fin support plate, recheck the installation accuracy of the lifting fin support plate. S3. Arrange a first positioning fixture and a second positioning fixture at the top of the lifting fin well, and arrange the first positioning fixture and the second positioning fixture at the corresponding positions at the bottom of the lifting fin well. The first positioning fixture and the second positioning fixture are arranged perpendicularly. After installation, confirm that the installation positions of the first positioning fixture and the second positioning fixture are accurate. A first marker point, a second marker point, and a third marker point are set on the first positioning fixture, and a hole is drilled at each marker point; a fourth marker point, a fifth marker point, a sixth marker point, and a seventh marker point are set on the second positioning fixture, and a hole is drilled at each marker point. S31. The accuracy of multiple marker points of the first and second positioning fixtures is re-measured using a total station; S32. Set a steel wire rope in each of the marked points on the first positioning fixture and the second positioning fixture respectively, and let each steel wire rope pass through the corresponding marked point on the first positioning fixture and the second positioning fixture in sequence; check the verticality of each steel wire rope. S4. Hoist the guide rail into the lifting fin well and install it, and set an adjustment mechanism on the lifting fin support plate near each guide rail to adjust the installation position of the guide rail. After the guide rail is hoisted and installed, steel wire ropes are installed again on the first positioning fixture and the second positioning fixture. Multiple measurement distances are determined based on the steel wire ropes, and the multiple measurement distances are determined to meet the predetermined requirements. S5. Re-measure the installation accuracy of the guide rail. After the installation accuracy of the guide rail meets the requirements, complete the installation of the lifting fin support plate and the guide rail.

2. The installation method of the research vessel lifting fin support plate and guide rail according to claim 1, characterized in that, Step S4 also includes at least the following: before hoisting the guide rail, ensuring that the straightness of the guide rail meets the requirements.

3. The installation method of the research vessel lifting fin support plate and guide rail according to claim 2, characterized in that, The adjustment mechanism includes: multiple sets of adjusting bolts and adjusting bolt fixing plates. The adjusting bolt fixing plates are fixedly connected to the lifting fin support plates by spot welding. The adjusting bolts are threadedly connected to the adjusting bolt fixing plates. The tail of the adjusting bolt abuts against the guide rail, and the position of the guide rail is adjusted by rotating the adjusting bolts.

4. The installation method of the research vessel lifting fin support plate and guide rail according to claim 3, characterized in that, After adjustment, the adjusting bolt and the adjusting bolt fixing plate are fixed by spot welding, and the first positioning fixture and the second positioning fixture are removed.

5. The installation method of the research vessel lifting fin support plate and guide rail according to claim 4, characterized in that, In step S1, when marking multiple lifting fin support plates, the marking is performed in order from bottom to top; The accuracy requirement for the height of the scribing on the lifting fin support plate is ±1mm.

6. The method for installing the research vessel lifting fin support plate and guide rail according to any one of claims 1-5, characterized in that, Before step S1, the method also includes: determining the accuracy of the lifting fin cofferdam; The length and width clearance error of the lifting fin cofferdam is determined to be within ±8mm, and the verticality of the bulkhead of the lifting fin cofferdam is within ±6mm.

7. The installation method of the research vessel lifting fin support plate and guide rail according to claim 6, characterized in that, Both the first and second positioning fixtures are temporarily fixed to the inner wall of the well by spot welding.

8. The installation method of the research vessel lifting fin support plate and guide rail according to claim 6, characterized in that, The first positioning fixture is arranged along the length of the ship, and the second positioning fixture is arranged along the width of the ship; the centerline of the first positioning fixture is parallel to the centerline of the hull, and the distance between the centerline of the first positioning fixture and the centerline of the hull is the first distance A; the distance between the centerline of the second positioning fixture and the bow bulkhead is the second distance B.

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