Deck segment hoisting device and method

Abstract

The present application relates to ship hull hoisting technical field, disclose a kind of deck section hoisting tool and method, hoisting tool includes sling, reinforcing portion, fastener and locking piece, sling is installed on the non-structural surface of deck section, and the intersection position of the structural surface of deck section longitudinal skeleton, transverse skeleton is opposite with the installation position of sling;Reinforcing portion is connected between adjacent sling, reinforcing portion has the lamination surface that is consistent with the non-structural surface of deck section, multiple installation holes are set on lamination surface;Fastener is equipped with multiple, each fastener is fixed with non-structural surface by each installation hole respectively;Locking piece is installed on fastener;Locking piece is fastened and laminated on non-structural surface by lamination surface, so that each reinforcing portion and each sling form frame force transmission structure on non-structural surface.The hoisting force of each sling is effectively transmitted by forming frame force transmission structure, so that sling force is multi-point position dispersed and conducted to deck section, avoid deck section being torn.

Description

Technical Field

[0001] This invention relates to the field of ship hull hoisting technology, and in particular to a hoisting fixture and method for deck sections. Background Technology

[0002] In shipbuilding, some ship models have large superstructures and thin plate thicknesses (4mm or 5mm), with the deck sections formed by assembling multiple segments vertically, horizontally, and vertically reaching a weight of approximately 220 tons. Currently, the cranes for these deck sections are designed with a multi-point lifting arrangement, which theoretically can disperse the concentrated lifting force. However, due to the thinness of the deck sections and the small size of the structural steel reinforcement, even with a multi-point lifting method, there is still a risk of excessive localized stress concentration, posing a safety hazard of tearing in the lifting point areas of the deck section. Summary of the Invention

[0003] The purpose of this invention is to provide a deck section hoisting fixture and method to strengthen the hoisting of deck sections and prevent the deck sections from being torn in the hoisting point area.

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

[0005] One aspect of the present invention is to provide a deck section lifting fixture, comprising:

[0006] Multiple gantry cranes are provided. The gantry cranes are installed on the non-structural surface of the deck section, and the intersection of the longitudinal and transverse ribs on the structural surface of the deck section is directly opposite the installation position of the gantry crane.

[0007] A reinforcing section is connected between adjacent gantry cranes. The reinforcing section has a cavity that opens to one side and has a mating surface that fits against the non-structural surface of the deck section. Multiple mounting holes are provided on the mating surface. Each mounting hole penetrates the mating surface and communicates with the cavity.

[0008] The fasteners are provided in multiple forms, and each fastener passes through a mounting hole and is fixed to the non-structural surface.

[0009] A locking element is installed on the fastener;

[0010] The locking member secures the contact surface to the non-structural surface, so that each of the reinforcing parts and each of the augers forms a frame force transmission structure on the non-structural surface.

[0011] Preferably, the plurality of gantry cranes are arranged in a rectangular pattern, and the plurality of gantry cranes and the plurality of reinforcing parts are connected to form a rectangular frame structure, wherein the center of the rectangular frame structure and the center of gravity of the deck section are located on the same vertical line.

[0012] Preferably, the included angle between the hoisting lines of the hoisting horse at two vertices of the same frame edge of the rectangular frame structure is less than or equal to 60°.

[0013] Preferably, reinforcing plates are provided on opposite sides of the longitudinal or transverse ribs relative to the installation position of the hoist.

[0014] Preferably, the fastener is welded to the non-structural surface.

[0015] Preferably, the reinforcing part is spot welded to the adjacent hanging horse.

[0016] Preferably, each of the lifting horses has a lifting ring for connecting the lifting line, and the central axis of each lifting ring is perpendicular to the width direction of the deck section.

[0017] Another aspect of the present invention is to provide a method for lifting deck sections using the deck section lifting fixture described above, comprising the following steps:

[0018] Step S1: Install multiple cranes on the non-structural surface of the deck section, with the installation positions of the cranes directly opposite the intersections of the longitudinal and transverse ribs on the structural surface of the deck section.

[0019] Step S2: Fix a fastener at a set interval on the non-structural surface between adjacent hanging horses;

[0020] Step S3: According to the set interval of the fastener, multiple mounting holes are opened on the mating surface of the reinforcing part, and each mounting hole is connected to the cavity of the reinforcing part.

[0021] Step S4: Align the mounting holes of the reinforcing part with the fasteners, so that each fastener is inserted into the mounting hole;

[0022] Step S5: Install the locking member onto the fastener. The locking member securely attaches the contact surface to the non-structural surface, so that each of the reinforcing parts and each of the gantry cranes forms a frame force transmission structure on the non-structural surface.

[0023] Preferably, after step S5, the method further includes: spot welding the reinforcing part to the adjacent hanging horse.

[0024] Preferably, in step S1, the plurality of gantry cranes are arranged in a rectangular pattern, and the center of the rectangle formed by the plurality of gantry cranes is located on the same vertical line as the center of gravity of the deck section.

[0025] Compared with the prior art, the beneficial effects of the deck section hoisting fixture and method of this invention are as follows:

[0026] The deck section lifting fixture of this invention includes lifting horses, reinforcing parts, fasteners, and locking devices. The lifting horses are installed on the non-structural surface of the deck section, with their installation positions directly opposite the intersections of the longitudinal and transverse stiffeners on the structural surface of the deck section. The reinforcing parts connect adjacent lifting horses, with mounting holes on their contact surfaces against the non-structural surfaces. Fasteners pass through these mounting holes and are fixed to the non-structural surfaces. The locking devices further secure the contact surfaces to the non-structural surfaces, forming a frame-like force transmission structure between the reinforcing parts and the lifting horses on the non-structural surfaces. This frame-like force transmission structure effectively transmits the lifting force of each lifting horse. The locking devices and fasteners ensure that the reinforcing parts are in close contact with the deck section, allowing the force from the lifting horses to be quickly and widely transmitted to the deck section, distributing the force and preventing excessive localized stress on the deck section. This prevents excessive stress on the deck section and avoids tearing of the deck section. Attached Figure Description

[0027] Figure 1 This is a cross-sectional schematic diagram of the deck section hoisting fixture described in an embodiment of the present invention;

[0028] Figure 2 yes Figure 1 Enlarged view of part A in the middle;

[0029] Figure 3 This is a top view schematic diagram of the deck section hoisting fixture described in an embodiment of the present invention.

[0030] Numbering on the map:

[0031] 1. Hanging horse; 11. Hanging rings;

[0032] 2. Reinforcing section; 21. Adhesive surface;

[0033] 3. Fasteners;

[0034] 4. Locking components;

[0035] 5. Deck section; 501. Non-structural surface; 502. Longitudinal reinforcement; 51. First section; 52. Second section; 53. Third section; 54. Fourth section;

[0036] 6. Reinforcing plate;

[0037] 7. Lifting line. Detailed Implementation

[0038] In the description of this invention, it should be noted that the terms "center," "upper," "lower," "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," "second," and "third" are used for descriptive purposes only and should not be construed as indicating or implying relative importance.

[0039] In the description of this invention, it should be noted that, unless otherwise explicitly specified and limited, the terms "installation," "connection," and "joining" 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 direct connection or an indirect connection through an intermediate medium; and they can refer to the internal communication between two components. Those skilled in the art can understand the specific meaning of the above terms in this invention based on the specific circumstances.

[0040] The specific embodiments of the present invention will be described in further detail below with reference to the accompanying drawings and examples. The following examples are for illustrative purposes only and are not intended to limit the scope of the invention.

[0041] It should be noted that in this invention, the structural surface of the deck section 5 is the side with welded ribs, while the non-structural surface 501 is a smooth surface, which is the opposite surface of the structural surface. The ribs include longitudinally arranged longitudinal ribs 502 and transversely arranged transverse ribs. The transverse ribs and longitudinal ribs 502 are intersected on the structural surface of the deck section 5 to reinforce the deck. Both the transverse ribs and the longitudinal ribs 502 are T-shaped profiles.

[0042] See Figures 1-3 This invention provides a deck section hoisting fixture, including a hoist 1, a reinforcing part 2, fasteners 3, and a locking member 4. Multiple hoists 1 are provided, each installed on a non-structural surface 501 of the deck section 5, with the intersection of the longitudinal and transverse stiffeners on the structural surface of the deck section 5 directly opposite the installation position of the hoist 1. The reinforcing part 2 connects adjacent hoists 1, and has a cavity opening to one side. The reinforcing part 2 has a mating surface 21 that fits against the non-structural surface 501 of the deck section 5, with multiple mounting holes on the mating surface 21. Each mounting hole penetrates the mating surface 21 and communicates with the cavity. Multiple fasteners 3 are provided, each passing through a mounting hole and fixed to the non-structural surface 501. The locking member 4 is installed on the fasteners 3, and the locking member 4 securely fastens the mating surface 21 to the non-structural surface 501, so that each reinforcing part 2 and each hoist 1 form a frame force transmission structure on the non-structural surface 501.

[0043] The installation position of the lifting horse 1 is set directly opposite the intersection of the longitudinal and transverse ribs on the structural surface of the deck section 5. This increases the relative area between the lifting horse 1 and the ribs on the structural surface, making it easier to transmit force through the longitudinal and transverse ribs 502, thereby effectively transferring the lifting force to the deck section 5. The lifting force of each lifting horse 1 is effectively transmitted through the formed frame force transmission structure. The locking part 4 and fastener 3 keep the reinforcing part 2 in close contact with the deck section 5, allowing the force of the lifting horse 1 to be quickly transmitted to the deck section 5 at multiple points. This effectively disperses the force on the deck section 5, avoids excessive local stress concentration on the deck section 5, and prevents the deck section 5 from being over-stressed and torn. It also reduces the amount of grinding work required for the large-scale footings that would be required for traditional welding reinforcement. Along the length of the reinforcing part 2, the reinforcing part 2 is tightly fitted to the deck section 5 by multiple fasteners 3 and multiple locking parts 4. There are multiple fixed points between the reinforcing part 2 and the deck section 5, which can also prevent the ends of the reinforcing part 2 between adjacent hoists 1 from warping and deforming when each hoisting point is lifted, so that the reinforcing part 2 is always fitted to the deck section 5, and can more effectively transmit the force.

[0044] Deck section 5 has a deck thickness of 4mm or 5mm, a length of 30 meters, a width of 20 meters, and a weight of 200 tons. (See also...) Figure 1 and Figure 3 The deck section 5 comprises a first section 51, a second section 52, a third section 53, and a fourth section 54. The first and second sections 51 and 52 are arranged side-by-side at the top, while the third and fourth sections 53 and 54 are arranged side-by-side at the bottom. The non-structural surface 501 is the upper surface of the first and second sections 51 and 52. The deck thickness of the first and second sections 51 and 52 is 4 mm, and the deck thickness of the third and fourth sections 53 and 54 is 5 mm. A first reinforcing rib is provided between the upper first section 51 and the lower third section 53, and a second reinforcing rib is provided between the upper second section 52 and the lower fourth section 54. Both the first and second reinforcing ribs are channel steel.

[0045] See Figure 2 In some embodiments, reinforcing plates 6 are provided on both sides of the longitudinal or transverse ribs opposite to the installation position of the crane 1. The reinforcing plates 6 reinforce the intersection of the transverse and longitudinal ribs 502, effectively increasing the size of the transverse or longitudinal ribs 502. This ensures that each part of the crane 1 has corresponding transverse or longitudinal ribs 502 or reinforcing plates 6, thereby effectively distributing the lifting force of the crane 1 to the transverse and longitudinal ribs 502 and the reinforcing plates 6. The lifting force is then transferred to the deck section 5 through the transverse and longitudinal ribs 502 and the reinforcing plates 6, preventing stress concentration in the deck section 5. When the transverse or longitudinal ribs 502 are T-shaped, the reinforcing plates 6 are parallel to the vertical portion of the T-shaped ribs.

[0046] See Figures 1-3 In some embodiments, multiple lifting masts 1 are arranged in a rectangular pattern, and the multiple lifting masts 1 are connected with multiple reinforcing parts 2 to form a rectangular frame structure. The center of the rectangular frame structure and the center of gravity G of the deck section 5 are located on the same vertical line. During lifting, to avoid tilting of the deck section 5, the convergence center of the lifting lines 7 of the multiple lifting masts 1 and the center of gravity G of the deck section 5 are located on the same vertical line. Since the center of the rectangular frame structure and the center of gravity G of the deck section 5 are located on the same vertical line, the convergence center of the lifting lines 7 of the multiple lifting masts 1, the center of gravity G of the deck section 5, and the center of the rectangular frame structure are collinear. This ensures that while preventing the deck section 5 from tilting, the force on each lifting mast 1 is balanced, which helps to avoid stress concentration. The reinforcing parts 2 are connected to the lifting masts 1 to form the frame edge of the rectangular frame structure, and the length direction of the reinforcing parts 2 is consistent with the length direction of the frame edge. The included angle α between the lifting lines 7 of the lifting masts 1 at two vertices of the same frame edge of the rectangular frame structure is less than or equal to 60°. The installation direction of each hoist 1 is consistent, and each hoist 1 has a lifting ring 11 that connects to the lifting line 7. The central axis of each lifting ring 11 is perpendicular to the width direction of the deck section 5 to ensure effective force transmission when hoisting the hoist 1.

[0047] Multiple mounting holes are spaced apart along the length of the reinforcing part 2, and multiple fasteners 3 are correspondingly provided with each mounting hole. The spacing between adjacent fasteners 3 is 350mm. In some embodiments, the fasteners 3 are welded to the non-structural surface 501. Multiple fasteners 3 can be welded to the non-structural surface 501 at intervals first, and then the mounting holes are fitted onto the fasteners 3. This facilitates the fixing of the fasteners 3 to the non-structural surface 501, and the pre-fixed fasteners 3 can also play a positioning role in the installation of the reinforcing part 2.

[0048] In some embodiments, the reinforcing part 2 is spot-welded to the adjacent hanging horse 1, which can quickly strengthen the connection between the reinforcing part 2 and the hanging horse 1 and avoid deformation of the reinforcing part 2 and the hanging horse 1 during welding.

[0049] In some embodiments, multiple reinforcing ribs are spaced apart along the length of the reinforcing part 2 in the cavity. The structure of the reinforcing part 2 is strengthened by the multiple reinforcing ribs, so that the connection between adjacent gantry 1 is stable. Furthermore, the reinforcing part 2 is attached to the deck section 5, which enhances the strength of the reinforcing part 2. This is equivalent to enhancing the overall strength of the reinforcing part 2 and the deck section 5, making the deck section 5 less prone to tearing.

[0050] In some embodiments, the reinforcing part 2 is a channel steel, the cavity is a groove in the channel steel, the groove provides installation space for the locking member 4, and the mating surface 21 is provided on the outer wall of one groove of the channel steel. The fastener 3 is a stud, and the locking member 4 is a nut. The fastener 3 and the locking member 4 are threaded together.

[0051] The present invention also provides a method for hoisting a deck section, which uses the deck section hoisting fixture described above to strengthen the hoisting of the deck section 5, specifically including the following steps:

[0052] Step S1: Multiple cranes 1 are installed on the non-structural surface 501 of the deck section 5. The installation position of the cranes 1 is directly opposite to the intersection of the longitudinal stiffeners 502 and the transverse stiffeners on the structural surface of the deck section 5. This increases the relative area between the cranes 1 and the stiffeners on the structural surface, making it easier to transmit force through the longitudinal stiffeners 502 and the transverse stiffeners, thereby effectively transmitting the lifting force to the deck section 5.

[0053] Step S2: Between adjacent hanging horses 1, a fastener 3 is fixed on the non-structural surface 501 at a set interval of 350mm.

[0054] Step S3: According to the set interval of the fastener 3, multiple mounting holes are opened on the mating surface 21 of the reinforcing part 2, and each mounting hole is connected to the cavity of the corresponding reinforcing part 2.

[0055] Step S4: Align the mounting holes of the reinforcing part 2 with the fasteners 3, so that each fastener 3 is inserted into its respective mounting hole.

[0056] Step S5: Install the locking member 4 onto the fastener 3. The locking member 4 securely attaches the mating surface 21 to the non-structural surface 501, so that each reinforcing part 2 and each crane 1 form a frame force transmission structure on the non-structural surface 501. When the crane 1 is lifted, the force is quickly and effectively distributed to the frame force transmission structure and then distributed to the deck section 5.

[0057] In this invention, after arranging the lifting horses 1, multiple fasteners 3 are first installed between adjacent lifting horses 1, and then the reinforcing parts 2 are installed. The fasteners 3 not only serve to position and fix the reinforcing parts 2, but also to transmit force between the reinforcing parts 2 and the deck section 5. Along the length of the reinforcing parts 2, each reinforcing part 2 is tightly fitted to the deck section 5 by multiple fasteners 3 and multiple locking parts 4. There are multiple fixing points between the reinforcing parts 2 and the deck section 5, which can prevent the ends of the reinforcing parts 2 between adjacent lifting horses 1 from warping and deforming when lifting at each lifting point, so that the reinforcing parts 2 are always fitted to the deck section 5, and the force can be transmitted more effectively.

[0058] In some embodiments, after step S5, the method further includes: spot welding the reinforcing part 2 to the adjacent hanging horse 1, which can quickly strengthen the connection between the reinforcing part 2 and the hanging horse 1 and avoid deformation of the reinforcing part 2 and the hanging horse 1 during welding.

[0059] In some embodiments, during step S1, when installing the lifting horses 1, it is ensured that the installation direction of each lifting horse 1 is consistent. Specifically, each lifting horse 1 has a lifting ring 11 connected to the lifting line 7, and the central axis of each lifting ring 11 is perpendicular to the width direction of the deck section 5 to ensure effective force transmission during lifting of the lifting horse 1. Multiple lifting horses 1 are arranged in a rectangular pattern, and the center of the rectangle formed by the multiple lifting horses 1 is located on the same vertical line as the center of gravity of the deck section 5. During lifting, to avoid tilting of the deck section 5, the convergence center of the lifting lines 7 of the multiple lifting horses 1 is located on the same vertical line as the center of gravity of the deck section 5, and the center of the rectangular frame structure is also located on the same vertical line. Therefore, the convergence center of the lifting lines 7 of the multiple lifting horses 1, the center of gravity of the deck section 5, and the center of the rectangular frame structure are collinear, ensuring that while preventing tilting of the deck section 5, the force on each lifting horse 1 is balanced, which helps to avoid stress concentration. The reinforcing part 2 connects to the lifting horse 1 to form the frame edge of the rectangular frame structure, and the length direction of the reinforcing part 2 is consistent with the length direction of the frame edge. The included angle between the hoisting lines 7 of the hoist 1 at the two vertices of the same frame edge of the rectangular frame structure is less than or equal to 60°.

[0060] In some embodiments, after step S1 and before step S2, the following procedure is also included: performing a flaw detection inspection on the crane 1. After the flaw detection inspection is passed, reinforcing plates 6 are installed on both sides of the transverse or longitudinal stiffeners 502 at the structural surface position opposite to the installation position of the crane 1. By reinforcing the intersection of the transverse and longitudinal stiffeners 502 with the reinforcing plates 6, it is equivalent to increasing the specifications of the transverse or longitudinal stiffeners 502, so that each part of the crane 1 has a corresponding transverse or longitudinal stiffener 502 or reinforcing plate 6. This effectively distributes the lifting force of the crane 1 to the transverse or longitudinal stiffeners 502 and the reinforcing plates 6, and transmits the lifting force to the deck section 5 through the transverse or longitudinal stiffeners 502 and the reinforcing plates 6, thus avoiding stress concentration in the deck section 5. When the transverse or longitudinal stiffeners 502 are T-shaped, the reinforcing plates 6 are parallel to the vertical part of the T-shaped stiffeners.

[0061] It should be noted that other specific embodiments of the deck section hoisting method of the present invention are largely the same as the specific embodiments of the deck section hoisting fixtures described above, and will not be repeated here.

[0062] 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 deck section hoisting fixture, characterized in that, include: Multiple gantry cranes (1) are provided. The gantry cranes (1) are installed on the non-structural surface (501) of the deck section (5), and the intersection of the longitudinal stiffeners (502) and the transverse stiffeners on the structural surface of the deck section (5) is directly opposite to the installation position of the gantry cranes (1). A reinforcing part (2) is connected between adjacent gantry cranes (1). The reinforcing part (2) has a cavity that opens to one side. The reinforcing part (2) has a mating surface (21) that fits against the non-structural surface (501) of the deck section (5). The mating surface (21) has a plurality of mounting holes. Each mounting hole passes through the mating surface (21) and communicates with the cavity. Fasteners (3) are provided in multiple forms, and each of the fasteners (3) passes through the mounting holes and is fixed to the non-structural surface (501); Locking element (4) is installed on the fastener (3); The locking member (4) fastens the contact surface (21) to the non-structural surface (501), so that each of the reinforcing parts (2) and each of the gantry (1) form a frame force transmission structure on the non-structural surface (501); Multiple cranes (1) are arranged in a rectangular shape. Multiple cranes (1) are connected with multiple reinforcing parts (2) to form a rectangular frame structure. The center of the rectangular frame structure and the center of gravity of the deck section (5) are located on the same vertical line. The reinforcing parts (2) are connected with the cranes (1) to form the frame edge of the rectangular frame structure. The length direction of the reinforcing parts (2) is consistent with the length direction of the frame edge. Multiple mounting holes are spaced apart along the length direction of the reinforcing parts (2). Multiple fasteners (3) are provided one-to-one with the multiple mounting holes.

2. The deck section lifting fixture according to claim 1, characterized in that, The included angle between the hoisting lines (7) of the gantry (1) at the two vertices of the same frame edge of the rectangular frame structure is less than or equal to 60°.

3. The deck section lifting fixture according to claim 1, characterized in that, Reinforcing plates (6) are provided on the opposite sides of the longitudinal rib (502) or the transverse rib, which are opposite to the installation position of the gantry (1).

4. The deck section lifting fixture according to claim 1, characterized in that, The fastener (3) is welded and fixed to the non-structural surface (501).

5. The deck section lifting fixture according to claim 1, characterized in that, The reinforcing part (2) is spot welded to the adjacent auger (1).

6. The deck section lifting fixture according to claim 1, characterized in that, Each of the aforementioned lifting horses (1) has a lifting ring (11) that connects to the lifting line (7), and the central axis of each of the aforementioned lifting rings (11) is perpendicular to the width direction of the deck section (5).

7. A method for lifting deck sections using a deck section lifting fixture as described in any one of claims 1-6, characterized in that, Includes the following steps: Step S1: Multiple gantry cranes (1) are installed on the non-structural surface (501) of the deck section (5). The installation position of the gantry cranes (1) is directly opposite to the intersection of the longitudinal stiffeners (502) and the transverse stiffeners on the structural surface of the deck section (5). The multiple gantry cranes (1) are arranged in a rectangular pattern, and the center of the rectangle formed by the multiple gantry cranes (1) is located on the same vertical line as the center of gravity of the deck section (5). Step S2: Between adjacent hanging horses (1), a fastener (3) is fixed on the non-structural surface (501) at a set interval. Step S3: According to the set interval of the fastener (3), multiple mounting holes are opened on the mating surface (21) of the reinforcing part (2), and each mounting hole is connected to the cavity of the reinforcing part (2); Step S4: Align the mounting holes of the reinforcing part (2) with the fasteners (3) so that each fastener (3) is inserted into the mounting holes respectively; Step S5, the locking member (4) is installed on the fastener (3). The locking member (4) fastens the contact surface (21) to the non-structural surface (501), so that each of the reinforcing parts (2) and each of the gantry (1) form a frame force transmission structure on the non-structural surface (501).

8. The method for hoisting a deck section according to claim 7, characterized in that, After step S5, the method further includes spot welding the reinforcing part (2) to the adjacent hanging horse (1).

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