Bow installation method, bow and floating platform

Abstract

The invention belongs to the technical field of ship construction, and discloses a bow mounting method, a bow and a floating platform. The bow mounting method comprises the following steps: positioning an upper bow section, and mounting an upper casting on the upper bow section by taking the upper bow section as a reference; setting a first butt joint reference on the interface cross section of the upper casting; the lower bow section is positioned, and the lower casting is installed on the lower bow section with the lower bow section as the reference; a second butt joint datum is arranged on the interface cross section of the lower casting; the bow upper section provided with the upper casting is hoisted to the bow lower section provided with the lower casting, the connector cross section of the upper casting and the connector cross section of the lower casting are in butt joint and folded, and the first butt joint datum corresponds to the second butt joint datum; and the bow upper section and the bow lower section are welded, and the upper casting and the lower casting are welded. According to the bow mounting method, the mounting and positioning accuracy of all parts of the bow can be improved, and the manufacturing quality of the bow can be improved.

Description

Technical Field

[0001] This invention relates to the field of shipbuilding technology, and in particular to a bow installation method, a bow section, and a floating platform. Background Technology

[0002] Currently, floating platforms typically use extra-long cast steel components to connect the upper and lower bow sections at the bow, achieving a zero-margin docking. This docking connection requires extremely high installation precision, ensuring that deviations in the centerline, outline, and perpendicularity are all controlled within ±3mm.

[0003] However, the above-mentioned docking process presents the following challenges: First, the positioning of the lower bow section is done in mid-air, making positioning extremely difficult. Second, the large dimensions of the upper and lower bow sections increase the difficulty of positioning and installation. Furthermore, some interfaces of the upper and lower bow sections have complex herringbone structures, further complicating installation. Finally, the deformation generated during the welding of the upper and lower bow sections is irreversible, requiring strict control of welding deformation to avoid affecting the final installation accuracy. Existing docking methods are insufficient to meet these high-precision installation requirements.

[0004] Therefore, there is an urgent need for a bow installation method, a bow and a floating platform to solve the above problems. Summary of the Invention

[0005] According to one aspect of the present invention, the object is to provide a bow mounting method that can improve the mounting and positioning accuracy of various parts of the bow and improve the manufacturing quality of the bow.

[0006] To achieve this objective, the present invention adopts the following technical solution: Bow mounting methods include: S10. Position the upper section of the bow. Using the upper section of the bow as a reference, install the upper casting onto the upper section of the bow. S20. Set a first mating reference on the interface cross-section of the upper casting; S30. Position the lower section of the bow. Using the lower section of the bow as a reference, install the lower casting onto the lower section of the bow. S40. Set a second mating datum on the interface cross-section of the lower casting; S50. Hoist the upper section of the bow with the upper casting installed onto the lower section of the bow with the lower casting installed, and make the interface cross-section of the upper casting and the interface cross-section of the lower casting align and join together, so that the first docking reference corresponds to the second docking reference. S60. Weld the upper section and lower section of the bow, and weld the upper casting and lower casting.

[0007] As a preferred embodiment of the bow mounting method provided by the present invention, the first docking reference includes a plurality of first docking mark points, and the first docking mark points are provided at the apex corner and turning point of the interface cross section of the upper casting. The second docking reference includes multiple second docking mark points, which are set at the top corners and turning points of the interface cross-section of the lower casting.

[0008] As a preferred embodiment of the bow mounting method provided by the present invention, step S50 includes: S51. During the segmented hoisting of the bow section on which the upper casting is installed, the coordinates of the first docking mark point and the coordinates of the second docking mark point are monitored. S52. Under the coordinate system of the theoretical model, with the second docking mark as the reference, adjust the position of the first docking mark until the coordinates of the first docking mark coincide with the corresponding second docking mark, thus completing the docking of the upper casting and the lower casting.

[0009] As a preferred embodiment of the bow installation method provided by the present invention, reflective targets are provided on both the first docking mark point and the second docking mark point. In S51, a total station is used to measure the three-dimensional coordinates of multiple reflective targets to monitor the coordinates of the first docking mark point and the second docking mark point.

[0010] As a preferred embodiment of the bow installation method provided by the present invention, in S52, firstly, the second docking mark point is positioned in the theoretical model coordinates. When the three-dimensional deviations between the actual position and the theoretical position of the second docking mark point are not greater than the allowable error value, it is determined that the positioning of the second docking mark point is completed. Then, based on the actual position of the second docking mark, adjust the position of the first docking mark.

[0011] As a preferred embodiment of the bow mounting method provided by the present invention, the allowable error value is 3mm.

[0012] As a preferred embodiment of the bow mounting method provided by the present invention, in S60, while welding the upper casting and the lower casting, the following is performed: The docking monitoring quantities of the upper and lower castings are measured and monitored in real time. The docking monitoring quantities include the spatial position changes of the first docking reference and the second docking reference, as well as the height, length and width changes at the docking section between the upper and lower castings. When the deviation of the monitoring quantity exceeds the preset deviation, adjust the welding direction.

[0013] As a preferred embodiment of the bow mounting method provided by the present invention, in S60, the joints of the upper casting and the lower casting are simultaneously welded on both sides of the bow in the lateral direction. The upper and lower sections of the bow are welded simultaneously on both sides of the bow's transverse direction.

[0014] According to another aspect of the present invention, an object is to provide a bow section that is installed using a bow section mounting method as described in any of the above embodiments, the bow section comprising an upper bow section, a lower bow section, an upper casting, and a lower casting, the upper casting being mounted on the upper bow section, the lower casting being mounted on the lower bow section, the upper bow section and the lower bow section being mutually abutted, and the upper casting and the lower casting being mutually abutted.

[0015] According to another aspect of the invention, the object is to provide a floating platform comprising a bow as described above.

[0016] The beneficial effects of this invention are: The bow assembly method provided by this invention includes: S10, positioning the upper bow section, and installing the upper casting onto the upper bow section using the upper bow section as a reference. Step S10 ensures that the installation references of the upper casting and the upper bow section are consistent, guaranteeing the accuracy of their assembly. S20, setting a first mating reference on the interface cross-section of the upper casting. S30, positioning the lower bow section, and installing the lower casting onto the lower bow section using the lower bow section as a reference. Step S30 also ensures that the installation references of the lower casting and the lower bow section are consistent, guaranteeing the accuracy of their assembly. S40, setting a second mating reference on the interface cross-section of the lower casting. Steps S20 and S40, with the first and second mating references, provide guidance for the subsequent joining and assembly of the upper and lower castings, facilitating precise docking of the upper and lower castings. S50. Hoist the upper bow section with the upper casting onto the lower bow section with the lower casting, and align the cross-section of the upper casting with the cross-section of the lower casting, aligning the first and second docking references. Step S50 uses the alignment of the first and second docking references as a standard to ensure the upper and lower castings are properly joined, improving the installation and positioning accuracy of each part of the bow and thus enhancing the manufacturing quality of the bow. S60. Weld the upper and lower bow sections, and weld the upper and lower castings. Step S60 completes the entire bow installation process. Attached Figure Description

[0017] To more clearly illustrate the technical solutions in the embodiments of the present invention, the accompanying drawings used in the description of the embodiments of the present invention will be briefly introduced below. Obviously, the accompanying drawings described below are only some embodiments of the present invention. For those skilled in the art, other drawings can be obtained based on the content of the embodiments of the present invention and these drawings without creative effort.

[0018] Figure 1 This is a schematic diagram of the bow docking provided in an embodiment of the present invention; Figure 2 This is a schematic diagram of the interface cross-section of the upper casting provided in an embodiment of the present invention; Figure 3 This is a flowchart of the bow installation method provided in an embodiment of the present invention.

[0019] In the picture: 100. Upper section of the bow; 200. Upper casting; 300. Lower section of the bow; 400. Lower casting; 500. First docking mark; 600. Casting docking section; 700. Section docking section. Detailed Implementation

[0020] The technical solution of the present invention will be further described below with reference to the accompanying drawings and specific embodiments.

[0021] To make the objectives, technical solutions, and advantages of the embodiments of the present invention clearer, the technical solutions of the embodiments of the present invention will be clearly and completely described below with reference to the accompanying drawings. Obviously, the described embodiments are only some embodiments of the present invention, and not all embodiments. The components of the embodiments of the present invention described and shown in the accompanying drawings can generally be arranged and designed in various different configurations.

[0022] Therefore, the following detailed description of the embodiments of the invention provided in the accompanying drawings is not intended to limit the scope of the claimed invention, but merely to illustrate selected embodiments of the invention. All other embodiments obtained by those skilled in the art based on the embodiments of the invention without inventive effort are within the scope of protection of the invention.

[0023] It should be noted that similar labels and letters in the following figures indicate similar items. Therefore, once an item is defined in one figure, it does not need to be further defined and explained in subsequent figures.

[0024] In the description of this invention, it should be noted that the terms "upper," "lower," "left," "right," "vertical," "horizontal," "inner," and "outer," etc., indicate the orientation or positional relationship based on the orientation or positional relationship shown in the accompanying drawings, or the orientation or positional relationship commonly used when the product of this invention is in use. 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," "second," and "third," etc., are used only to distinguish descriptions and should not be construed as indicating or implying relative importance. In the description of this invention, unless otherwise stated, "a plurality of" means two or more.

[0025] In the description of this invention, it should also be noted that, unless otherwise explicitly specified and limited, the terms "set," "connect," and "fix" 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. Those skilled in the art can understand the specific meaning of the above terms in this invention based on the specific circumstances.

[0026] In this invention, unless otherwise explicitly specified and limited, "above" or "below" the second feature can include direct contact between the first and second features, or contact between the first and second features through another feature between them. Furthermore, "above," "over," and "on top" of the second feature includes the first feature directly above or diagonally above the second feature, or simply indicates that the first feature is at a higher horizontal level than the second feature. "Below," "below," and "under" the second feature includes the first feature directly below or diagonally below the second feature, or simply indicates that the first feature is at a lower horizontal level than the second feature.

[0027] In this embodiment, the term "and / or" is merely a description of the relationship between associated objects, indicating that three relationships can exist. For example, A and / or B can represent: A existing alone, A and B existing simultaneously, or B existing alone. Additionally, in this invention, the character " / " generally indicates that the preceding and following associated objects have an "or" relationship.

[0028] Embodiments of the present invention are described in detail below. Examples of these embodiments are shown in the accompanying drawings, wherein the same or similar reference numerals denote the same or similar elements or elements having the same or similar functions throughout. The embodiments described below with reference to the accompanying drawings are exemplary and are only used to explain the present invention, and should not be construed as limiting the present invention.

[0029] Figure 1 A schematic diagram of the bow docking provided in an embodiment of the present invention is shown. (Refer to...) Figure 1This embodiment provides a bow section and a floating platform, the floating platform including the bow section provided in this embodiment. The bow section includes an upper bow section 100, a lower bow section 300, an upper casting 200, and a lower casting 400. The upper casting 200 is installed on the upper bow section 100, and the lower casting 400 is installed on the lower bow section 300. The upper bow section 100 and the lower bow section 300 are mutually connected, and the upper casting 200 and the lower casting 400 are mutually connected.

[0030] Specifically, refer to Figure 2 The bottom end of the upper casting 200 in the height direction is recessed relative to the bottom of the upper bow segment 100 in the height direction, and the upper end of the lower casting 400 in the height direction is protruding relative to the top of the lower bow segment 300 in the height direction. That is to say, the section joint 700 between the upper bow segment 100 and the lower bow segment 300 is misaligned with the casting joint section 600 between the upper casting 200 and the lower casting 400, and the casting joint section 600 between the upper casting 200 and the lower casting 400 is positioned higher in the height direction than the section joint section 700 between the upper bow segment 100 and the lower bow segment 300.

[0031] Figure 2 This diagram shows a cross-sectional view of the interface of the upper casting provided in an embodiment of the present invention. Figure 3 A flowchart illustrating the bow mounting method provided in an embodiment of the present invention is shown. (Refer to...) Figure 2 and Figure 3 This embodiment also provides a bow mounting method. The bow is mounted using the bow mounting method provided in this embodiment.

[0032] The specific steps of the bow installation method are as follows: Step S10: Position the upper section 100 of the bow. Using the upper section 100 of the bow as a reference, install the upper casting 200 onto the upper section 100 of the bow. Step S20: Set a first mating reference on the interface cross-section of the upper casting 200; Step S30: Position the lower bow section 300, and install the lower casting 400 onto the lower bow section 300 using the lower bow section 300 as a reference. Step S40: Set a second mating reference on the interface cross-section of the lower casting 400; Step S50: Hoist the upper section 100 of the bow with the upper casting 200 installed onto the lower section 300 of the bow with the lower casting 400 installed, and make the interface cross-section of the upper casting 200 and the interface cross-section of the lower casting 400 align and join, so that the first docking reference corresponds to the second docking reference. Step S60: Weld the upper bow sub-section 100 and the lower bow sub-section 300, and weld the upper casting 200 and the lower casting 400.

[0033] Through the above step S10, the installation reference of the upper casting 200 and the upper bow sub-section 100 can be unified, ensuring the accuracy of their assembly. Similarly, through the above step S30, the installation reference of the lower casting 400 and the lower bow sub-section 300 can be unified, ensuring the accuracy of their assembly. Through the above steps S20 and S40, the first docking reference and the second docking reference can provide guidance for the subsequent docking and closing of the upper casting 200 and the lower casting 400, facilitating the precise docking of the upper casting 200 and the lower casting 400. Through the above step S50, the alignment of the first docking reference and the second docking reference can be used as the standard for whether the upper casting 200 and the lower casting 400 are closed in place, improving the installation and positioning accuracy of each part of the bow, and thus improving the manufacturing quality of the bow. Through the above step S60, the complete process of the bow installation can be completed.

[0034] Specifically, referring to Figure 2 , the first docking reference includes multiple first docking marking points 500, and the first docking marking points 500 are arranged at the top corners and turning points of the interface cross-section of the upper casting 200. Similarly, the second docking reference includes multiple second docking marking points, and the second docking marking points are arranged at the top corners and turning points of the interface cross-section of the lower casting 400.

[0035] In this embodiment, the interface cross-section of the upper casting 200 is taken as an example for description. As Figure 2 shown, the interface cross-section of the upper casting 200 is in a "person" - shaped structure, which forms three positive corners and one negative corner. The outer top of the positive corner and the inner top of the negative corner respectively form the first docking marking points 500. The shape of the interface cross-section of the lower casting 400 is the same as that of the interface cross-section of the upper casting 200, and the number and arrangement of the second docking marking points are the same as those of the first docking marking points 500.

[0036] The above step S50 specifically includes the following steps: Step S51: During the hoisting process of the upper bow sub-section 100 installed with the upper casting 200, monitor the coordinates of the first docking marking points 500 and monitor the coordinates of the second docking marking points. Step S52: Under the theoretical model coordinates, with the second docking marking points as the reference, adjust the position of the first docking marking points 500 until the coordinates of the first docking marking points 500 coincide with the corresponding second docking marking points, and complete the docking of the upper casting 200 and the lower casting 400.

[0037] Specifically, in this embodiment, reflective targets are provided on both the first docking mark point 500 and the second docking mark point. In step S51, a total station is used to measure the three-dimensional coordinates of multiple reflective targets in order to monitor the coordinates of the first docking mark point 500 and the second docking mark point during the hoisting process.

[0038] More specifically, in step S52, firstly, the second docking mark point is positioned in the theoretical model coordinate system. When the three-dimensional deviations between the actual position and the theoretical position of the second docking mark point are all no greater than the allowable error value, the positioning of the second docking mark point is considered complete. Then, based on the actual position of the second docking mark point, the position of the first docking mark point 500 is adjusted. The aforementioned three-dimensional deviations specifically refer to the errors ΔX, ΔY, and ΔZ of each second docking mark point relative to its theoretical position on the X, Y, and Z axes in the theoretical model coordinate system. That is, when the values ​​of ΔX, ΔY, and ΔZ are no greater than the allowable error value, the positioning of the second docking mark point can be considered complete. Optionally, in this embodiment, the aforementioned allowable error value is specifically 3 mm.

[0039] It should be noted that the operation of "adjusting the position of the first docking mark point 500 based on the actual position of the second docking mark point" enables the upper bow section 100 and the upper casting 200 to perform trend matching during hoisting and positioning relative to the lower bow section 300 and the lower casting 400. This ensures that the deviation directions of the upper casting 200 and the lower casting 400 are aligned, facilitating a subsequent accurate one-time docking. For example, if the lower casting 400 is offset by +2mm in one direction, then during the positioning of the lower casting 400, its target position should be actively offset by +2mm in the same direction. This will facilitate a subsequent accurate one-time docking of the upper casting 200 and the lower casting 400.

[0040] Continue to refer to Figure 3In step S60, while welding the upper casting 200 and the lower casting 400, the following steps are performed: Real-time measurement and monitoring of the docking monitoring quantities of the upper casting 200 and the lower casting 400 are conducted. These monitoring quantities include the spatial positional changes of the first and second docking references, as well as the height, length, and width changes at the casting docking section 600 between the upper and lower castings 200 and 400. When the deviation of the docking monitoring quantities exceeds a preset deviation, the welding direction is adjusted. This achieves the effect of real-time adjustment and control of the center position of the upper casting 200, the center position of the lower casting 400, and the relative position between the upper and lower castings 200 using welding stress, ensuring that the docking position accuracy deviation of the upper casting 200 and the lower casting 400 after welding is less than the preset deviation. In this embodiment, the preset deviation is specifically 1.5 mm.

[0041] Specifically, in step S60, the upper casting 200 and the lower casting 400 are simultaneously welded at their joints on both sides of the bow's transverse direction; the upper section 100 and the lower section 300 of the bow are also simultaneously welded on both sides of the bow's transverse direction. These steps ensure the symmetry and quality of the bow welding.

[0042] Preferably, during the above welding process, active welding deformation suppression technology is also required. By pre-setting welding parameters, the heat input during the welding process is controlled, thereby effectively controlling the deformation of the upper casting 200 and the lower casting 400 during the welding process.

[0043] The above description is merely a preferred embodiment of the present invention and an explanation of the technical principles employed. Those skilled in the art should understand that the scope of disclosure in this invention is not limited to technical solutions formed by specific combinations of the above-described technical features, but should also cover other technical solutions formed by arbitrary combinations of the above-described technical features or their equivalents without departing from the above-disclosed concept. For example, technical solutions formed by substituting the above features with (but not limited to) technical features with similar functions disclosed in this invention.

[0044] Obviously, the above embodiments of the present invention are merely examples for clearly illustrating the present invention, and are not intended to limit the implementation of the present invention. Those skilled in the art will be able to make various obvious changes, readjustments, and substitutions without departing from the scope of protection of the present invention. It is neither necessary nor possible to exhaustively describe all embodiments here. Any modifications, equivalent substitutions, and improvements made within the spirit and principles of the present invention should be included within the scope of protection of the claims of the present invention.

Claims

1. A bow section installation method, characterized in that, include: S10. Position the upper section (100) of the bow. Using the upper section (100) of the bow as a reference, install the upper casting (200) onto the upper section (100) of the bow. S20. Set a first mating reference on the interface cross-section of the upper casting (200); S30. Position the lower section (300) of the bow. Using the lower section (300) of the bow as a reference, install the lower casting (400) onto the lower section (300) of the bow. S40. A second docking reference is set on the interface cross-section of the lower casting (400); S50. The upper section (100) of the bow with the upper casting (200) installed is hoisted onto the lower section (300) of the bow with the lower casting (400) installed, and the interface cross-section of the upper casting (200) is aligned with the interface cross-section of the lower casting (400) so that the first docking reference corresponds to the second docking reference. S60. Weld the upper section (100) and the lower section (300) of the bow, and weld the upper casting (200) and the lower casting (400).

2. The bow mounting method according to claim 1, characterized in that, The first docking reference includes multiple first docking mark points (500), and the first docking mark points (500) are provided at the top corner and turning point of the interface cross section of the upper casting (200). The second docking reference includes multiple second docking mark points, which are provided at the top corners and turning points of the interface cross section of the lower casting (400).

3. The bow mounting method according to claim 2, characterized in that, Step S50 includes: S51. During the hoisting of the bow section (100) on which the upper casting (200) is installed, the coordinates of the first docking mark (500) are monitored, and the coordinates of the second docking mark are monitored. S52. Under the coordinates of the theoretical model, with the second docking mark point as the reference, adjust the position of the first docking mark point (500) until the coordinates of the first docking mark point (500) coincide with the corresponding second docking mark point, and complete the docking of the upper casting (200) and the lower casting (400).

4. The bow mounting method according to claim 3, characterized in that, Reflective targets are set on both the first docking mark point (500) and the second docking mark point. In S51, a total station is used to measure the three-dimensional coordinates of multiple reflective targets to monitor the coordinates of the first docking mark point (500) and the second docking mark point.

5. The bow mounting method according to claim 3, characterized in that, In S52, firstly, the second docking mark point is located in the theoretical model coordinates. When the three-dimensional deviations between the actual position and the theoretical position of the second docking mark point are not greater than the allowable error value, it is determined that the positioning of the second docking mark point is complete. Then, based on the actual position of the second docking mark point, adjust the position of the first docking mark point (500).

6. The bow mounting method according to claim 5, characterized in that, The allowable error is 3mm.

7. The bow mounting method according to claim 1, characterized in that, While welding the upper casting (200) and the lower casting (400) in S60, the following is performed: The docking monitoring quantities of the upper casting (200) and the lower casting (400) are measured and monitored in real time. The docking monitoring quantities include the spatial position changes of the first docking reference and the second docking reference, as well as the height changes, length changes and width changes at the casting docking section (600) between the upper casting (200) and the lower casting (400). When the deviation of the monitoring quantity exceeds the preset deviation, adjust the welding direction.

8. The bow mounting method according to claim 7, characterized in that, In S60, the upper casting (200) and the lower casting (400) are welded simultaneously on both sides of the bow transverse direction; The upper section (100) and the lower section (300) of the bow are welded simultaneously on both sides of the bow in the transverse direction.

9. The bow section, characterized in that, The bow is installed using the bow installation method as described in any one of claims 1-8. The bow includes an upper bow section (100), a lower bow section (300), an upper casting (200), and a lower casting (400). The upper casting (200) is installed on the upper bow section (100), and the lower casting (400) is installed on the lower bow section (300). The upper bow section (100) and the lower bow section (300) are connected to each other, and the upper casting (200) and the lower casting (400) are connected to each other.

10. A floating platform, characterized in that, The floating platform includes the bow as described in claim 9.

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