A device for single-deck segment hoisting deformation control and installation method

Abstract

The application discloses a device for single-deck sectional hoisting deformation control and a mounting method, the device is a combined A-frame structure, comprising support columns, an upper fixed horse plate at a top point, a tensioner, and a lower fixed horse plate and a tension lower horse plate fixed on a deck, the upper and lower ends of the two support columns are movably connected with the upper fixed horse plate and the lower fixed horse plate through fasteners respectively, and the upper and lower ends of the tensioner are fixedly connected with the upper fixed horse plate and the tension lower horse plate respectively. The A-frame structure is arranged on the single deck, the tension of the support column and the tension of the tensioner are generated, and the single-deck structure can be subjected to reverse deformation before sectional hoisting; positive deformation caused by weak structural strength during hoisting of the single-deck structure is avoided, hoisting precision is improved after the positive and reverse deformations are offset; meanwhile, the support column structure, the tensioner and each horse plate on the ship body are connected through bolts, are easy to mount and dismount, can be repeatedly used for many times, and the economy of the device is improved.

Description

Technical Field

[0001] This invention belongs to the field of shipbuilding technology, and in particular relates to a device and installation method for controlling deformation during single-deck section hoisting. Background Technology

[0002] In the shipbuilding industry, especially in the construction of single-deck chemical tankers and single-deck independent LNG carriers, due to the relatively weak structural components on a single deck, the middle of the deck often deforms during the hoisting of the deck sections. These deformations often exceed the requirements of construction precision. At the hoisting site, due to tight time requirements, on-site repair is difficult and costly, which seriously affects the progress and quality of the project. Therefore, controlling the hoisting deformation of single-deck sections to improve the stability and precision control of the deck structure is particularly important and is the key to the entire hoisting process.

[0003] A search revealed that Chinese invention application CN117020486A discloses a plate unit anti-deformation assembly and disassembly machine based on a floating top frame beam. This machine "includes a movable gantry mechanism and a floating top frame beam anti-deformation mechanism. The movable gantry mechanism includes a gantry and a traveling mechanism, which is located at the bottom of the gantry and provides movement on a track. Multiple floating track plates are installed on the gantry. The floating top frame beam anti-deformation mechanism includes a floating frame beam, multiple floating guide devices, and multiple sets of floating anti-deformation devices." By adopting this technical solution, during the anti-deformation process, the bearing surface of the anti-deformation safety hook contacts the bottom surface of the welding jig. The end of the telescopic rod of the anti-deformation clamping mechanism extends and abuts against the upper surface of the plate unit. Continued extension and retraction of the telescopic rod of the anti-deformation clamping mechanism pre-clamps the plate unit in anti-deformation, ensuring that the deformation amount of the plate unit after full welding meets the deformation requirements of the welding process. However, this method uses a traveling mechanism, which is complex and costly.

[0004] For example, the utility model application document with publication number CN203977613U discloses a pre-tensioned installation structure for buckling-restrained braces, which "includes a layered structure and at least one buckling-restrained brace. The first and second frame beams in the layered structure are horizontally arranged and parallel to each other, and the columns of this layer are fixedly connected between the first and second frame beams. The buckling-restrained brace is pre-tensioned to the first and second frame beams before the layered structure has completed its main settlement. The first end of the buckling-restrained brace is fixedly connected to the connection node at the first frame beam, and an elastic deformation space is left between the second end and the connection node at the second frame beam. A tensioning device for generating pre-tensioning force is installed between the second end and the connection node at the second frame beam." This structure is applied in the field of seismic and disaster prevention technology for building structures. Although it provides support and stability by connecting the frame beams of the layered structure with pre-tensioning force, its limitation lies in its fixed installation position, reliance on the tension provided by the upper beam structure, inability to adapt to the hoisting requirements of suspended deck sections, and lack of flexibility.

[0005] In view of the limitations of the existing technology, developing a simple, economical, and reusable hoisting deformation control device and installation method is of great practical significance for improving the accuracy and efficiency of single-deck segmented hoisting and reducing costs. This device should be adaptable to different hoisting environments, provide effective deformation control, simplify the operation process, and reduce dependence on on-site construction conditions. Summary of the Invention

[0006] To address the problems existing in the prior art, the present invention aims to provide a device and installation method for deformation control during single-deck segmented hoisting. By setting A-frame support columns and tensioners on the single deck, reverse deformation can be induced in the single deck structure before segmented hoisting; this avoids positive deformation caused by the weak structural strength of the single deck structure during hoisting, and the cancellation of positive and negative deformations improves hoisting accuracy; at the same time, the support column structure, tensioners, and hull are connected by bolts, which is easy to install and disassemble, and can be reused repeatedly, improving the economy of the device.

[0007] This invention provides a device and installation method for controlling deformation during the hoisting of a single deck segment. The single deck segment includes a longitudinal strong central girder located in the middle of the deck surface, longitudinal strong longitudinal girders located on both sides of the deck surface, and a transverse strong beam located between the longitudinal strong central girder and the longitudinal strong longitudinal girders.

[0008] The device includes an A-frame structure, which comprises support columns, deck panels, and a tensioning device. The deck panels include an upper fixed deck panel, a lower fixed deck panel for fixed connection to a single deck, and a tensioning lower deck panel. The left and right ends of the upper fixed deck panel are movably connected to the upper ends of the support columns via fasteners, and the lower ends of the support columns are movably connected to the lower fixed deck panels via fasteners. The upper end of the tensioning device is movably connected to the center of the upper fixed deck panel via fasteners, and the lower end of the tensioning device is movably connected to the tensioning lower deck panel via fasteners. The tensioning device extends and retracts to adjust the distance between the upper fixed deck panel and the tensioning lower deck panel. Simultaneously, the angle between the support columns and the deck surface changes as the tensioning device extends and retracts.

[0009] The method includes the following steps:

[0010] S1. Determine the length of the support columns and the length of each deck section based on the transverse length of the deck sections;

[0011] S2. Groove holes are machined in the support columns and plates of the device;

[0012] S3. Assemble the upper end of the support column onto the upper fixing plate;

[0013] S4. Fix the lower fixed plate and the tension lower plate to the deck, and assemble the lower end of the support column onto the lower fixed plate: the lower fixed plate is located at the intersection between the transverse strong beam and the longitudinal far end strong longitudinal girder, and the tension lower plate is located at the intersection between the transverse strong beam and the longitudinal strong middle longitudinal girder.

[0014] S5. Install a tensioner between the lower tension plate and the upper fixed tension plate;

[0015] S6. Adjust the length of the tensioner until it is taut to complete the installation of the device.

[0016] As a preferred technical solution, in step S1:

[0017] When the deck section being hoisted is symmetrical, the length of each support column is the same;

[0018] When the deck segment being hoisted is asymmetrical, the lengths of the support columns on both sides of the A-frame structure are determined according to the actual shape of the deck segment, so that the vertex of the angle between the two support columns is located on the vertical line of the midpoint of the concave part on the deck surface.

[0019] As a preferred technical solution, the specific steps of step S2 include: opening a U-shaped groove at the upper end and the lower end of the support column, into which the upper fixing plate or the lower fixing plate can be inserted; opening symmetrical through holes on both sides of the groove wall of the U-shaped groove; opening a circular connecting hole at the left end, middle end and right end of the upper fixing plate; and opening a circular connecting hole at the lower fixing plate and the tension lower plate; the diameter of each connecting hole and the through hole is the same.

[0020] As a further preferred technical solution, the specific steps of step S3 include: inserting the upper U-shaped grooves of the two support columns into the left and right ends of the upper fixing plate respectively, and aligning the through holes at the upper U-shaped grooves of the support columns with the connecting holes on the upper fixing plate, and then connecting and limiting them with fasteners.

[0021] As a further preferred technical solution, the specific steps in step S4 include:

[0022] S4-1. Weld and fix the two lower fixed plates and the tension lower plate to the deck surface of the single deck section respectively;

[0023] S4-2. Connect the upper and lower fixed plates via support columns: respectively, insert the lower U-shaped groove of each support column into the lower fixed plate on the same side, and align the through hole at the lower U-shaped groove of the support column with the connection hole on the lower fixed plate on the same side, and then connect and limit the position with fasteners.

[0024] As a further preferred technical solution, the specific steps in step S5 include: connecting the upper end of the tensioner to the connecting hole in the middle of the upper fixed plate using fasteners, adjusting the length of the tensioner, and connecting the lower end of the tensioner to the connecting hole of the tension lower plate using fasteners.

[0025] Furthermore, the method also includes: S7, repeating steps S1 to S6 to install several sets of the device along the longitudinal length direction according to the longitudinal length of the single deck segment.

[0026] Furthermore, the method also includes: S8, after completing the hoisting work of the single deck section, dismantling and storing the device, and before reuse, adjusting the lower fixing plates on both sides to the same height.

[0027] Furthermore, in step S7:

[0028] When the shape of a single deck segment remains unchanged along its longitudinal length, the installation positions of the horse plates in each group of devices on the deck surface remain consistent.

[0029] When the shape of a single deck segment changes along its longitudinal length, the installation position of the mast plate on the deck surface in each group of devices is adjusted according to the specific positions of the longitudinal strong central girder, the transverse strong beam, and the longitudinal far end strong girder.

[0030] As described above, the present invention has the following beneficial effects:

[0031] (1) The present invention provides a device and installation method for controlling deformation during single-deck segmented hoisting. By setting an A-frame structure on a single deck, tension of the support column and tension of the tensioner are generated, which can cause reverse deformation of the single deck structure before segmented hoisting. This avoids positive deformation caused by the weak structural strength of the single deck structure during hoisting. The positive and negative deformations are offset, which improves the hoisting accuracy.

[0032] (2) The present invention provides a device and installation method for controlling deformation during single-deck segmented hoisting. The support column structure, the tensioner and the hull plate are connected by bolts, which is easy to install and disassemble and can be used repeatedly, thus improving the economy of the device. Attached Figure Description

[0033] Figure 1 This is a schematic diagram of the overall structure of the A-frame structure in this invention after it is installed on the deck sections.

[0034] Figure 2 This is a schematic diagram of the support column in this invention.

[0035] Figure 3 This is a schematic diagram of the upper fixing plate in this invention.

[0036] Figure 4 This is a schematic diagram of the lower fixed plate in this invention.

[0037] Figure 5 yes Figure 1 A schematic diagram of the cross-sectional structure at point AA.

[0038] Figure 6 This is a schematic diagram of the tensioner in this invention.

[0039] Figure 7 This is a schematic diagram of the tension dismounting plate in this invention.

[0040] The specific explanations of the reference numerals in the attached drawings are as follows: 1. Support column; 2. Upper fixed plate; 3. Lower fixed plate; 4. Bolt; 5. Tensioner; 6. Lower tension plate; 7. Longitudinal strong middle longitudinal girder; 8. Longitudinal far end strong longitudinal girder; 9. Transverse strong crossbeam. Detailed Implementation

[0041] To better understand the purpose, structure, and function of this invention, the technical solutions in the embodiments of this invention will be clearly and completely described below with reference to the accompanying drawings. Obviously, the described embodiments are only some embodiments of this invention, and not all embodiments.

[0042] In the description of this invention, it should be noted that the positional relationships indicated by terms such as "longitudinal", "lateral", "up", "down", "front", "back", "left", "right", "vertical", "horizontal", "top", "bottom", "inner", and "outer" are based on the positional relationships shown in the accompanying drawings and are only for the purpose of facilitating the description of the embodiments of this invention and simplifying the description. They are not intended to indicate or imply that the device or element referred to must have a specific orientation, be constructed and operated in a specific direction, and therefore should not be construed as a limitation of this invention.

[0043] Example

[0044] like Figure 2 As shown, this embodiment provides a device and its installation method for controlling deformation during the hoisting of a single deck segment, utilizing Embodiment 1. The single deck segment includes a longitudinal strong central girder 7 located in the middle of the deck surface, longitudinal far-end strong longitudinal girder 8 located on both sides of the deck surface, and a transverse strong beam 9 located between the longitudinal strong central girder 7 and the longitudinal far-end strong longitudinal girder 8.

[0045] The device includes an A-frame structure, which includes support columns 1, a support plate, and a tensioner 5. The support plate includes an upper fixed support plate 2 serving as the apex of the A-frame structure, a lower fixed support plate 3 for fixed connection with a single deck, and a tensioning lower support plate 6.

[0046] The left and right ends of the upper fixed platform 2 are movably connected to the upper end of the support column 1 by fasteners. The lower end of each support column 1 is movably connected to a lower fixed platform 3 by fasteners. The upper end of the tensioner 5 is movably connected to the center of the upper fixed platform 2 by fasteners. The lower end of the tensioner 5 is movably connected to the lower tension platform 6 by fasteners. The tensioner 5 adjusts the distance between the upper fixed platform 2 and the lower tension platform 6 by telescoping. At the same time, as the tensioner 5 telescops, each support column 1 rotates between the upper fixed platform 2 and the lower fixed platform 3, thereby changing the angle between the support column 1 and the deck surface.

[0047] In this embodiment, the upper fixing plate 2 and the lower fixing plate 3 are made of high-strength steel plates. The lower fixing plate 3 has a circular connecting hole located near one side of the lower fixing plate 3, for movably connecting with the lower end of the support column 1. The upper fixing plate 2 has three circular connecting holes located near the lower edge of the upper fixing plate 2. The connecting holes include a left connecting hole, a right connecting hole, and a middle connecting hole. The left connecting hole and the right connecting hole are located near the left and right ends of the upper fixing plate 2, respectively, for movably connecting with the upper end of the support column 1. The middle connecting hole is located in the center of the upper fixing plate 2 and is movably connected with the tensioner 5. The force at the opening position of each connecting hole conforms to the combined force of the tension of the support column 1 and the tension of the tensioner 5, thereby ensuring the stability of the overall structure. The support column 1 is made of O-shaped steel, and U-shaped grooves are provided at both the upper and lower ends of the support column 1, making the cross-section of the support column 1 H-shaped. The width of the U-shaped groove is greater than the width of the upper fixing plate 2 and greater than the width of the lower fixing plate 3. Symmetrical through holes are provided on both sides of the groove wall. The tensioner 5 is a manually tightened threaded tensioner 5, which was purchased and will not be described in detail here. The fastener is a bolt 4, which is made of high-strength material.

[0048] The method includes the following steps:

[0049] S1. Determine the length of support column 1 and each deck plate in the device based on the transverse length of the deck sections:

[0050] Based on the lateral length of the segment, two support columns 1, one upper fixed support plate 2, two lower fixed support plates 3, and one tension lower support plate 6 are fabricated. When the deck segment being hoisted is symmetrical, the lengths of the two support columns 1 are consistent to ensure the symmetry of the device and further guarantee a more reasonable stress distribution. When the deck segment being hoisted is asymmetrical, the lengths of the support columns 1 on both sides of the A-frame structure are determined according to the actual shape of the deck segment, so that the vertex of the angle between the two support columns 1 is located on the vertical line of the midpoint of the concave area on the deck surface. The tension lower support plate 6, used to connect the tensioner 5, is installed at the midpoint of the concave area on the deck surface. The total length of all support plates does not exceed the lateral length of the deck segment.

[0051] S2. Grooving is performed on the support column 1 and the mounting plate in the device: A U-shaped groove is made at the upper and lower ends of the support column 1, into which the upper mounting plate 2 or the lower mounting plate 3 can be inserted. Symmetrical through holes are made on the two side walls of the U-shaped groove. Three circular connecting holes are made on the upper mounting plate 2, and one circular connecting hole is made on the lower mounting plate 3 and the tension mounting plate 6. The diameters of the through holes, connecting holes, and circular holes are all the same, and bolts 4 can be inserted after alignment.

[0052] S3. Assemble the upper end of the support column 1 onto the upper fixing plate 2: Insert the upper U-shaped grooves of the two support columns 1 into the left and right ends of the upper fixing plate 2 respectively, and align the through hole at the upper U-shaped groove of the support column 1 with the connecting hole on the upper fixing plate 2, and then connect and limit the position with fasteners.

[0053] S4. Fix the lower fixed support plate 3 and the tension lower support plate 6 to the deck, and assemble the lower end of the support column 1 onto the lower fixed support plate 3:

[0054] S4-1. The two lower fixed support plates 3 and the tension lower support plate 6 are welded and fixed to the front deck surface of the single deck section, and the reverse side of the deck should be provided with corresponding longitudinal girder and other strong structures. Specifically, the lower fixed support plate 3 is welded and fixed at the intersection between the transverse strong beam 9 and the longitudinal far end strong longitudinal girder 8, and the tension lower support plate 6 is welded and fixed at the intersection between the transverse strong beam 9 and the longitudinal strong middle longitudinal girder 7, so that the tension lower support plate 6 and each lower fixed support plate 3 are located on the same straight line of the transverse strong beam 9;

[0055] S4-2. Connect the upper fixing plate 2 and the lower fixing plate 3 through the support column 1: respectively, the lower U-shaped groove of each support column 1 is locked onto the lower fixing plate 3 on the same side, and the through hole at the lower U-shaped groove of the support column 1 is aligned with the connection hole on the lower fixing plate 3 on the same side and then connected and limited by fasteners.

[0056] S5. Install the tensioner 5 between the lower tension plate 6 and the upper fixed tension plate 2: Connect the upper end of the tensioner 5 to the middle connecting hole of the upper fixed tension plate 2 with fasteners, adjust the length of the tensioner 5, and connect the lower end of the tensioner 5 to the connecting hole of the lower tension plate 6 with fasteners.

[0057] S6. Manually adjust the length of the tensioner 5 until it is tightened. At this point, the angle between each support column 1 and the deck surface is greater than 25°. After tightening the tensioner 5, the connection between the middle of the single deck section and the lower fixed plate 6 is subjected to the upward tension of the tensioner 5. At the same time, the connection between the two sides of the single deck section and the lower fixed plate 3 is subjected to the tension of the support column 1, causing the middle of the single deck section to undergo upward pre-deformation. This counteracts the downward deformation of the middle of the deck during conventional section hoisting, effectively preventing the middle of the deck section from sinking and completing the installation of the device.

[0058] S7. Based on the longitudinal length of the single deck segment, repeat steps S1 to S6 to install several sets of the aforementioned devices along the longitudinal length direction. Three to five such devices can be installed to effectively improve the control of segment deformation.

[0059] When the shape of a single deck segment remains unchanged along its longitudinal length, the installation positions of the horse plates in each group of devices on the deck surface remain consistent.

[0060] When the shape of a single deck segment changes along its longitudinal length, the installation position of the horse plate in each group of devices on the deck surface is adjusted according to the specific positions of the longitudinal strong central girder 7, the transverse strong beam 9, and the longitudinal far end strong girder 8.

[0061] S8. After completing the hoisting of the single deck section, dismantle and store the device. The device can be reused. Before reuse, adjust the lower fixing plates 3 on both sides to the same height.

[0062] The above description is merely a preferred embodiment of the present invention and is not intended to limit the invention. Those skilled in the art can make various changes or equivalent substitutions to these features and embodiments without departing from the spirit and scope of the invention. Furthermore, under the teachings of this invention, these features and embodiments can be modified to adapt to specific situations and materials without departing from the spirit and scope of the invention. Therefore, the present invention is not limited to the specific embodiments disclosed herein, and all embodiments falling within the scope of the claims of this application are protected by this invention.

Claims

1. A method for installing a device for controlling deformation during the hoisting of a single deck segment, wherein the single deck segment comprises a longitudinal strong central girder (7) located in the middle of the deck surface, longitudinal far-end strong longitudinal girder (8) located on both sides of the deck surface, and a transverse strong beam (9) located between the longitudinal strong central girder (7) and the longitudinal far-end strong longitudinal girder (8), characterized in that, The device includes an A-frame structure, which includes a support column (1), a deck, and a tensioner (5). The deck includes an upper fixed deck (2), a lower fixed deck (3) for fixed connection with a single deck, and a tension lower deck (6). The left and right ends of the upper fixed deck (2) are movably connected to the upper end of a support column (1) by fasteners. The lower end of each support column (1) is movably connected to a lower fixed deck (3) by fasteners. The upper end of the tensioner (5) is movably connected to the center of the upper fixed deck (2) by fasteners. The lower end of the tensioner (5) is movably connected to the tension lower deck (6) by fasteners. The tensioner (5) adjusts the distance between the upper fixed deck (2) and the tension lower deck (6) by telescoping. At the same time, the angle between the support column (1) and the deck surface changes with the telescoping of the tensioner (5). The method includes the following steps: S1. Determine the length of the support column (1) and the length of each deck plate according to the transverse length of the deck section; S2. Groove holes are machined in the support column (1) and the horse plate in the device; S3. Assemble the upper end of the support column (1) onto the upper fixing plate (2); S4. Fix the lower fixed plate (3) and the tension lower plate (6) on the deck, and assemble the lower end of the support column (1) onto the lower fixed plate (3): the lower fixed plate (3) is located at the intersection between the transverse strong crossbeam (9) and the longitudinal far end strong longitudinal girder (8), and the tension lower plate (6) is located at the intersection between the transverse strong crossbeam (9) and the longitudinal strong middle longitudinal girder (7); S5. Install a tensioner (5) between the lower tension plate (6) and the upper fixed plate (2); S6. Adjust the length of the tensioner (5) until the tensioner (5) is tightened to complete the installation of the device.

2. The installation method of the device for controlling deformation during single-deck segmented hoisting according to claim 1, characterized in that, In step S1: When the deck section being hoisted is symmetrical, the lengths of each support column (1) are consistent; When the deck segment being hoisted is an asymmetrical segment, the length of the support columns (1) on both sides of the A-frame structure is determined according to the actual shape of the deck segment, so that the vertex of the angle between the two support columns (1) is located on the vertical line of the midpoint of the concave part on the deck surface.

3. The installation method of the device for controlling deformation during single-deck segmented hoisting according to claim 1, characterized in that, The specific steps of step S2 include: opening a U-shaped groove at the upper and lower ends of the support column (1), into which the upper fixing plate (2) or the lower fixing plate (3) can be inserted; opening symmetrical through holes on both sides of the groove wall of the U-shaped groove; opening a circular connecting hole at the left, middle and right ends of the upper fixing plate (2); opening a circular connecting hole on the lower fixing plate (3) and the tension lower plate (6); the diameter of each connecting hole and the through hole is the same.

4. The installation method of the device for controlling deformation during single-deck segmented hoisting according to claim 3, characterized in that, The specific steps of step S3 include: inserting the upper U-shaped grooves of the two support columns (1) into the left and right ends of the upper fixing plate (2) respectively, and aligning the through holes at the upper U-shaped grooves of the support columns (1) with the connecting holes on the upper fixing plate (2) and then connecting and limiting them with fasteners.

5. The installation method of the device for controlling deformation during single-deck segmented hoisting according to claim 3, characterized in that, The specific steps in step S4 include: S4-1. Weld and fix the two lower fixed plates (3) and the tension lower plate (6) to the deck surface of the single deck section respectively; S4-2. Connect the upper fixed plate (2) and the lower fixed plate (3) through the support column (1): respectively, the lower U-shaped groove of each support column (1) is inserted into the lower fixed plate (3) on the same side, and the through hole at the lower U-shaped groove of the support column (1) is aligned with the connection hole on the lower fixed plate (3) on the same side and then connected and limited by fasteners.

6. The installation method of the device for controlling deformation during single-deck segmented hoisting according to claim 3, characterized in that, The specific steps in step S5 include: connecting the upper end of the tensioner (5) to the connecting hole in the middle of the upper fixed plate (2) with fasteners, adjusting the length of the tensioner (5), and connecting the lower end of the tensioner (5) to the connecting hole of the tension lower plate (6) with fasteners.

7. The installation method of the device for deformation control during single-deck segmented hoisting according to any one of claims 1-6, characterized in that, The method further includes: S7, repeating steps S1 to S6 to install several sets of the device along the longitudinal length direction according to the longitudinal length of the single deck segment.

8. The installation method of the device for controlling deformation during single-deck segmented hoisting according to claim 7, characterized in that, The method also includes: S8, after completing the hoisting work of the single deck section, dismantling and storing the device, and before reuse, adjusting the lower fixing plates (3) on both sides to the same height.

9. The installation method of the device for deformation control during single-deck segmented hoisting according to claim 7, characterized in that, In step S7: When the shape of a single deck segment remains unchanged along its longitudinal length, the installation positions of the horse plates in each group of devices on the deck surface remain consistent. When the shape of a single deck segment changes along its longitudinal length, the installation position of the saddle plate in each set of devices on the deck surface is adjusted according to the specific positions of the longitudinal strong central girder (7), the transverse strong beam (9), and the longitudinal far end strong girder (8).

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