Ship deck lower scaffold device and laying and disassembling method thereof

Abstract

The invention discloses a ship deck lower scaffold device and a laying and disassembling method thereof, and belongs to the technical field of ship scaffolds. According to the device, a bulkhead pre-welding scaffold eye plate and a deck lower pre-welding scaffold hook serve as stress foundations, a scaffold horse, a steel pipe jig capable of being customized and spliced and an inclined hanging chain are connected through bolts to form a tension brace structure, only basic parts are welded, and no open fire operation exists in the whole process. Laying follows the principle from the two sides to the middle, disassembling is carried out according to the principle of later building and first disassembling and from the middle to the two sides, and during disassembling, head jacking operation can be carried out, and safety fulcrums are arranged. Welding damage is small, cabin adaptability is high, erection and disassembly are safe and efficient, components and accessories can be recycled, and the device is suitable for narrow closed cabins such as methanol cabins with high coating requirements.

Description

Technical Field

[0001] This invention relates to a scaffolding device under the deck of a ship and its installation and dismantling methods, which belongs to the technical field of marine scaffolding. Background Technology

[0002] During shipbuilding, scaffolding erection and dismantling are required for painting various compartments below deck. Methanol tanks, in particular, have high requirements for hull surface painting quality and limited working space. These scenarios not only demand sufficient structural stability from the scaffolding to ensure safety at heights, but also impose stringent requirements on the hull structure and the degree of damage to the surface coating after scaffolding erection and dismantling. It is essential to minimize subsequent sanding, touch-up painting, and other repair work, while also ensuring the dismantling process is adapted to the confined working space below deck to reduce safety risks.

[0003] Currently, the common method used in shipbuilding for laying scaffolding below deck is the traditional method described in CN109398644B: welding pieces below deck and suspending them downwards in a mountain-shaped scaffold. This method has technical drawbacks, including difficult disassembly, high operational risk, complicated grinding process for the pieces after disassembly, significant damage to the hull structure, and unsuitability for high-painting-requirement compartments such as methanol tanks.

[0004] Document CN116461673 A discloses a scaffold for ship construction and its erection method. By setting vertical reinforcing ribs between horizontal reinforcing ribs, it solves the problem that the scaffold height is determined by the spacing of horizontal reinforcing ribs and realizes flexible installation of scaffolding. However, this scaffold is mainly suitable for the reinforcing rib structure on the outside of the hull and does not take into account the construction characteristics of the narrow and enclosed compartments below the deck. In addition, it is still necessary to weld scaffolding plates on the vertical reinforcing ribs, resulting in many welding points. The damage to the hull painting still cannot meet the high requirements of methanol tanks. At the same time, no dismantling structure adapted to the narrow space is designed, and the dismantling difficulty and operation risk are still high.

[0005] Document CN219528344U discloses a platform suspension scaffolding device for rapid erection, which suspends scaffolding pipes and scaffold boards through steel bar hanging rings. It is suitable for construction under steel grating or steel beam structures. However, its suspension structure is steel bar hanging rings + steel plates / top hanging rings, and the scaffolding pipes are only limited by the bottom hanging rings. The quadrilateral structure has insufficient stability, and the suspension ropes at the top hanging rings cannot be directly removed during dismantling.

[0006] In summary, existing marine scaffolding cannot simultaneously meet the construction requirements of high painting standards below deck, low welding damage in small and enclosed compartments, high adaptability, and safe and convenient disassembly. There is an urgent need for a new type of under-deck scaffolding device and its installation and disassembly method. Summary of the Invention

[0007] To address the technical problems of existing ship deck scaffolding, such as significant welding damage during erection and dismantling, difficulty in disassembly, poor adaptability to different sized compartments, high risks of high-altitude operations, and inability to adapt to compartments with high painting requirements such as methanol tanks, this invention provides a ship deck scaffolding device and its installation and dismantling method.

[0008] The technical solution adopted in this invention is: a ship deck scaffolding device, which is fixedly connected to the ship's bulkhead on the lower side of the deck. The device is characterized in that: a left scaffolding eye plate and a right scaffolding eye plate are symmetrically arranged on both sides of the ship's bulkhead, and the left scaffolding eye plate and the right scaffolding eye plate are respectively connected to the left scaffolding horse and the right scaffolding horse by bolts. A steel pipe jig assembly is set between the left and right scaffolds. Several steel pipe jig hooks are set on the steel pipe jig assembly, and the one located at the center of the assembly is the central steel pipe jig hook. The lower surface of the deck is provided with several scaffold hooks corresponding to the hooks of the steel pipe jigs, and the hooks at the center of the deck are the central scaffold hooks. The center scaffold hook is connected to the center steel pipe jig hook only by a vertical chain. The other scaffold hooks are connected to two sets of steel pipe jig hooks. One set is the steel pipe jig hook corresponding to the scaffold hook below it, and the two are connected by a vertical chain. The other set is the steel pipe jig hook adjacent to the steel pipe jig hook corresponding to the scaffold hook below it and close to the center of the hull, and the two are connected by an oblique chain. The left and right scaffolding horses and steel pipe jigs constitute the support assembly, on which scaffold boards are laid and tied to secure the support assembly.

[0009] Furthermore, the steel pipe fixture assembly adopts a single steel pipe pattern or a symmetrical steel pipe pattern; in the case of a single steel pipe pattern, a single steel pipe fixture is used; in the case of a symmetrical steel pipe pattern, a left steel pipe fixture and a right steel pipe fixture are used.

[0010] Furthermore, the single steel pipe fixture, the left steel pipe fixture, and the right steel pipe fixture all have a structure with a steel pipe fixture connection hole at one end and a steel pipe fixture docking hole at the other end.

[0011] Furthermore, the docking hole of the steel pipe fixture is an elongated hole.

[0012] Furthermore, when the steel pipe jig assembly adopts a single steel pipe mode, the steel pipe jig connection hole at one end of the single steel pipe jig is detachably connected to the scaffolding connection hole of the left scaffolding; the steel pipe jig docking hole at the other end of the single steel pipe jig is detachably connected to the scaffolding connection hole of the right scaffolding.

[0013] Furthermore, when the steel pipe jig assembly adopts a symmetrical steel pipe pattern, the steel pipe jig connection hole of the left steel pipe jig and the steel pipe jig connection hole of the left scaffolding, and the steel pipe jig connection hole of the right steel pipe jig and the steel pipe jig connection hole of the right scaffolding are detachably connected; the steel pipe jig docking holes of the left steel pipe jig and the right steel pipe jig are detachably connected.

[0014] Furthermore, when the steel pipe fixture assembly adopts a single steel pipe mode, a set of central steel pipe fixture hooks is provided, which are located at the center of the single steel pipe fixture; when the steel pipe fixture assembly adopts a symmetrical steel pipe mode, two sets of central steel pipe fixture hooks are provided, which are respectively located at the steel pipe fixture docking holes of the left and right steel pipe fixtures.

[0015] The method for laying or removing scaffolding under the deck of a ship, with the laying extending from the hull bulkhead to one side of the compartment, includes the following steps: S1. Pre-construction preparations include: measuring the dimensions of the compartment, inspecting the quality of components, measuring oxygen and explosion levels in the compartment, and preparing the personnel for the operation. S2. The left scaffolding is bolted to the left scaffolding eye plate, and the right scaffolding is bolted to the right scaffolding eye plate. S3. One end of the steel pipe jig assembly can be detachably installed on the left scaffolding, and the other end can be detachably installed on the right scaffolding; S4. Lay scaffold boards from both sides of the hull toward the center, starting with the left side. After laying the scaffold boards on the left side, hang a vertical chain between the first set of scaffold hooks on the left and the corresponding first set of steel pipe jig hooks on the left. Then lay the scaffold boards between the first set of steel pipe jig hooks on the left and the second set of steel pipe jig hooks on the left. After laying, hang a diagonal chain between the first set of scaffold hooks on the left and the second set of steel pipe jig hooks on the left. Then hang a vertical chain between the second set of scaffold hooks on the left and the second set of steel pipe jig hooks on the left, until a vertical chain is hung between the center scaffold hook and the center steel pipe jig hook. Using the same laying sequence, the scaffolding was laid on the right side of the hull to complete the laying of the scaffolding. When dismantling scaffolding, the last to be erected should be removed first, following the reverse order of installation. The hanging chains, scaffold boards, steel pipe fixtures, and scaffold horses should be removed.

[0016] Both vertical and diagonal hanging chains are made of connected circular iron rings. The two ends of the hanging chain are hooks. After passing through the scaffold hooks or steel pipe jig hooks, the hanging chain is fixed to the iron rings by its own hook buckles. The length of the hanging chain can be adjusted according to the different positions of the hook buckles.

[0017] By adjusting the vertical chain lengths to be equal, the steel pipe jig and scaffolding are ensured to be on the same horizontal plane. Using chains of the same length at both ends of the jig ensures its levelness, while bolted connections primarily serve a reinforcing function, reducing swaying and improving safety.

[0018] Compared with existing technologies, the advantages of this invention are as follows: This invention only sets a few welding points between the hull bulkheads and the deck, and the support components are bolted together. This ensures the structural stability of the scaffolding in the enclosed compartments below deck, while minimizing welding damage to the hull structure. No additional grinding or repainting is required after disassembly, making it suitable for compartments with high painting requirements, such as methanol tanks. The steel pipe fixtures can be customized in single length according to the dimensions of the compartments below deck, and bolted together from the side bulkheads towards the middle to form an integral horizontal support frame. This solves the flexibility problem of existing scaffolding being unable to adapt to compartments of different sizes below deck, and the bolted connection method enables rapid assembly and disassembly of the support frame, significantly improving erection efficiency.

[0019] A slanted chain system connects steel pipe fixtures to scaffold hooks below deck, providing workers with safe fulcrums for dismantling operations. The chain's installation position allows workers to operate directly overhead, solving the technical challenges of difficult dismantling and high operational risks associated with traditional under-deck scaffolding. This system is well-suited for dismantling operations in confined spaces below deck, significantly improving safety and efficiency. Except for the basic welding of the scaffold eyeplates / hooks, no open flames are used during installation and dismantling. All component connections and disassemblies are mechanical, avoiding the safety hazards of open flames in enclosed compartments below deck and preventing secondary damage to the hull paint. This further adapts to the operational standards of compartments with high paint requirements. Attached Figure Description

[0020] To more clearly illustrate the technical solutions in the embodiments of the present invention or the prior art, the drawings used in the description of the embodiments or the prior art will be briefly introduced below. Obviously, the drawings described below are some embodiments of the present invention. For those skilled in the art, other drawings can be obtained based on these drawings without creative effort.

[0021] Figure 1 This is a schematic diagram of the scaffolding device under the ship's deck in Example 1.

[0022] Figure 2 This is a schematic diagram of the structure of the ship deck scaffolding device in Example 2.

[0023] Figure 3 This is a three-dimensional view of one side of the scaffolding structure under the ship's deck.

[0024] Figure 4 This is a front view of the structure on one side of the scaffolding installation under the ship's deck.

[0025] Figure 5 This is a schematic diagram of the dismantling process of the structure on one side of the scaffolding under the ship's deck.

[0026] In the diagram: 1. Deck; 11. Left first scaffold hook; 12. Left second scaffold hook; 13. Center scaffold hook; 14. Right second scaffold hook; 15. Right first scaffold hook. 2. Hull bulkhead; 21. Portal scaffolding eyeboard; 22. Starboard scaffolding eyeboard; 3. Left-handed horse stance; 3a. Right-handed horse stance; 4. Steel pipe fixture assembly; 4a. Single steel pipe fixture; 4b. Left steel pipe fixture; 4c. Right steel pipe fixture; 41. Left first steel pipe fixture hook; 42. Left second steel pipe fixture hook; 43. Center steel pipe fixture hook; 44. Right second steel pipe fixture hook; 45. Right first steel pipe fixture hook; 401. Steel pipe fixture connection hole; 402. Steel pipe fixture butt hole. 6. Scaffold boards; 7. Diagonal hanging chains; 7a. Vertical hanging chains. Detailed Implementation

[0027] The present invention will be specifically described below through embodiments. It should be noted that the following embodiments are only used to further illustrate the present invention, but are not limited thereto, unless otherwise stated.

[0028] Scaffolding eyeplates: steel plates with a thickness of ≥10mm, pre-welded to the preset positions of the ship's bulkhead 2. The scaffolding eyeplates are permanent welded parts, do not need to be removed, and can be reused. Their vertical spacing is ≤4m and horizontal spacing is ≤6m, which meets the fixing requirements of ship scaffolding wall ties.

[0029] Scaffold hooks: Made of HPB300 round steel with a diameter of ≥14mm, cold-bent and pre-welded to the lower surface of deck 1 at a predetermined position, corresponding to the horizontal position of the scaffold eye plate. They are also permanent welded parts and can be reused without being removed.

[0030] Scaffolding horse 3: A general-purpose component with fixed length, free from cracks, deformation, and severe corrosion, with a wall thickness ≥3.0mm; one end is detachably connected to the scaffolding eye plate by bolts, and the other end is detachably connected to the steel pipe fixture by bolts. The connecting bolts conform to the requirements of GB / T5780, and the tightening torque is 40~65N・m to ensure a tight connection.

[0031] Steel pipe fixture assembly: Steel pipes conforming to the material requirements of CB 4204-2012 are used; the length of a single pipe can be customized according to the size of the compartment below deck 1; multiple steel pipe fixtures can be detachably connected by bolts, and the mating surface is equipped with positioning bosses and positioning grooves. With the bolts tightened, the levelness is calibrated to ensure the horizontal angle of the overall horizontal support frame; the steel pipe fixtures can be used independently on one side or connected on both sides, and multiple sections can be continuously spliced. Only steel pipe fixtures in the remaining narrow space of the compartment are customized, while the rest are of general specifications, which improves the versatility of the components.

[0032] The 402 steel pipe fixture uses a long, narrow opening to allow for play during connection.

[0033] Hanging Chain 7: Made of steel chain, the diameter is determined by the number of working layers. For 2 layers or less, use hanging chain 7 with a diameter ≥13mm; for more than 2 layers, use hanging chain 7 with a diameter ≥18mm, conforming to the chain usage requirements of T / QGCML 1905-2023. Hanging chain 7 is connected as a whole by shackles and passes through the scaffold hooks. The shackles are matched according to the number of working layers (1.2t shackles for 1-2 layers, 1.7t shackles for 3-9 layers), and the shackle screws are tightened. Hanging chain 7 has an adjustable length to keep the steel pipe fixture horizontal under stress. Two hanging chains 7 are symmetrically set at a single connection point to ensure the stability of the steel pipe fixture assembly under stress. Hanging chain 7 connects the steel pipe fixture and the scaffold hooks at an angle to form a cantilever structure, ensuring that construction personnel can directly operate and dismantle overhead, and providing a safe fulcrum for dismantling operations.

[0034] This is a hanging chain 7 made of connected circular iron rings. The hanging chain 7 has hooks at both ends. After the hanging chain 7 passes through the scaffold hooks, it is fixed to the iron rings by its own hooks. The length can be adjusted according to the different positions of the hooks.

[0035] Using hanging chains of the same length at both ends of the steel pipe fixture can ensure that the steel pipe fixture is level, and the bolt connection provides reinforcement, reduces swaying and improves safety.

[0036] Scaffold boards 6: Steel scaffold boards 6 are used, with a thickness of ≥2mm, free from cracks and twisting, and meeting the material requirements of CB 4204-2023; scaffold boards 6 are fully laid on the horizontal support frame of steel pipe fixture 4, and are individually tied and fixed with 16# iron wire. The gaps between scaffold boards 6 are ≤100mm, there are no protruding boards, the height from the working surface is ≤300mm, and the width of the working surface is ≥600mm.

[0037] Guardrails and toe boards can be installed as needed on site: Guardrails are installed on the outside of the work platform with a height of 1.2m, which meets the mandatory requirements of CB 4204-2012; toe boards are 180mm high and installed at the bottom of the guardrails; the enclosure is tight, and a horizontal safety net is installed below the work level to prevent personnel and components from falling.

[0038] The scaffold eyeboards and scaffold hooks are the only welded components. There are no open flame operations during the laying and dismantling process. All component connections and disassemblies are mechanical operations, which avoids the safety hazards of open flame operations to the sealed compartments below deck 1, and at the same time prevents open flame operations from causing secondary damage to the hull paint.

[0039] When laying at both ends simultaneously, the length of the steel pipe fixture can be customized according to the length requirements. Multiple sections of steel pipe fixtures can be spliced ​​together, and the remaining small section can be customized to a special length. Most steel pipe fixtures are also universal.

[0040] When using the above technical solution, pre-construction preparations are required, and post-construction site cleanup is necessary, specifically: Pre-construction preparation: Measure the length, width, and height of the space below deck to determine the pre-set positions of scaffolding planks and hooks, as well as the general and customized specifications of the steel pipe fixtures. Currently, the methanol compartment using this solution is approximately 10m long, with a total steel pipe fixture length of 3.2m and an adjacent scaffolding hook spacing of 1.6m. It adopts an end-to-end laying method, with the steel pipe fixture length around 3.2m, and the strength check meets the usage requirements. If the compartment length is increased, multiple sections of steel pipe fixtures can be spliced ​​together, with the remaining smaller sections using customized lengths. The steel pipe fixtures can be reused.

[0041] Inspect the quality of scaffolding, steel pipe fixtures, chains, bolts, scaffold boards, guardrails and other components to ensure that the steel pipes are free from cracks, deformation and severe corrosion, the fasteners are free from cracks and stripped threads, the scaffold boards are free from damage, the chains are free from cracks, the diameter wear does not exceed 10% of the original diameter and the elongation does not exceed 5% of the original length. Unqualified components are strictly prohibited from use.

[0042] Oxygen and explosion tests and ventilation treatments are carried out on enclosed compartments below deck, such as methanol tanks, to ensure that the oxygen content inside the compartment is up to standard, there are no flammable or explosive gases, the illuminance inside the compartment is not less than 150 LX, and there are no blind spots in the lighting.

[0043] Workers must be certified and wear safety helmets, safety shoes, double-hook full-body safety belts, and other personal protective equipment as required. Safety briefings must be completed and signed confirmation procedures must be followed before work begins.

[0044] On-site cleanup: After dismantling, steel pipe fixtures, scaffolding, chains, scaffold boards, bolts, shackles and other components are sorted and placed according to specifications. Debris in the construction area is cleaned up in a timely manner, and 5S management is carried out on site.

[0045] Each component was inspected and repaired. Steel pipe jigs and scaffolding were checked for rust and deformation; chains were inspected for cracks and wear; scaffold boards were inspected for damage; and bolts and shackles were inspected for stripped threads and deformation. Qualified components were stored in the warehouse for reuse; unqualified components were scrapped.

[0046] The present invention will now be described in further detail with reference to the accompanying drawings. Example 1

[0047] This embodiment discloses a scaffolding device under the deck of a ship, which adopts a single steel pipe fixture structure.

[0048] like Figure 1 As shown, the scaffolding system below the ship's deck includes: Deck 1, with hull bulkhead 2 fixedly connected to the lower side of deck 1; hull bulkhead 2 is symmetrically provided with left scaffolding eye plate 21 and right scaffolding eye plate 22 on both sides, left scaffolding eye plate 21 is connected to left scaffolding horse 3 by bolts, and right scaffolding eye plate 22 is connected to right scaffolding horse 3a by bolts.

[0049] A steel pipe fixture assembly 4 is provided between the left scaffold 3 and the right scaffold 3a. In this embodiment, the steel pipe fixture assembly 4 adopts a single steel pipe mode and uses a single steel pipe fixture 4a.

[0050] The single steel pipe fixture 4a has a steel pipe fixture connection hole 401 at one end and a steel pipe fixture docking hole 402 at the other end. The steel pipe fixture docking hole 402 is an elongated hole, which facilitates fine-tuning of the position during installation.

[0051] The steel pipe fixture connection hole 401 at one end of the single steel pipe fixture 4a is detachably connected to the scaffolding connection hole 301 on the left scaffolding 3; the steel pipe fixture docking hole 402 at the other end of the single steel pipe fixture 4a is detachably connected to the scaffolding connection hole 301 on the right scaffolding 3a.

[0052] Several scaffold hooks are provided on the lower surface of deck 1, from left to right as follows: left first scaffold hook 11, left second scaffold hook 12, center scaffold hook 13, right second scaffold hook 14, and right first scaffold hook 15.

[0053] Several steel pipe fixture hooks are provided on the single steel pipe fixture 4a, from left to right: left first steel pipe fixture hook 41, left second steel pipe fixture hook 42, center steel pipe fixture hook 43, right second steel pipe fixture hook 44, and right first steel pipe fixture hook 45; among them, the center steel pipe fixture hook 43 is located at the center of the single steel pipe fixture 4a.

[0054] The central scaffold hook 13 is connected to the central steel pipe fixture hook 43 only by a vertical hanging chain 7a.

[0055] Each of the remaining scaffold hooks is connected to two sets of steel pipe jig hooks: one set is the corresponding steel pipe jig hook directly below, connected by a vertical chain 7a; the other set is the adjacent steel pipe jig hook closer to the center of the hull, connected by an oblique chain 7. Specifically, oblique chains 7 are installed between the left first scaffold hook 11 and the left second steel pipe jig hook 42, and between the left second scaffold hook 12 and the center steel pipe jig hook 43. Similarly, oblique chains 7 are installed between the right first scaffold hook 15 and the right second steel pipe jig hook 44, and between the right second scaffold hook 14 and the center steel pipe jig hook 43.

[0056] The left scaffolding 3, the right scaffolding 3a, and the single steel pipe fixture 4a together form a support structure. Scaffold boards 6 are laid and tied on the support structure to form a complete ship deck scaffolding device.

[0057] The method for laying the scaffolding device described in this embodiment extends from the ship's bulkhead to one side of the cabin. The specific steps are as follows: S1. Pre-construction preparation: Complete the measurement of compartment dimensions, inspection of component quality, oxygen and explosion testing and ventilation of the compartment, and safety and technical briefing for the workers. S2. Install the left scaffolding horse 3 onto the left scaffolding eye plate 21 with bolts, and install the right scaffolding horse 3a onto the right scaffolding eye plate 22 with bolts. S3. The steel pipe fixture connection hole 401 of the single steel pipe fixture 4a is detachably connected to the scaffolding connection hole 301 of the left scaffolding 3, and the steel pipe fixture docking hole 402 of the single steel pipe fixture 4a is detachably connected to the scaffolding connection hole 301 of the right scaffolding 3a. S4. Lay scaffolding boards 6 symmetrically from both sides of the hull toward the center: First, lay scaffold boards 6 on the left scaffold 3, and hang a vertical chain 7a between the left first scaffold hook 11 and the left first steel pipe jig hook 41; continue laying scaffold boards 6 between the left first steel pipe jig hook 41 and the left second steel pipe jig hook 42. After laying, hang a diagonal chain 7 between the left first scaffold hook 11 and the left second steel pipe jig hook 42, and hang a vertical chain 7a between the left second scaffold hook 12 and the left second steel pipe jig hook 42; continue laying scaffold boards 6 between the left second steel pipe jig hook 42 and the central steel pipe jig hook 43. After laying, hang a diagonal chain 7 between the left second scaffold hook 12 and the central steel pipe jig hook 43, and hang a vertical chain 7a between the central scaffold hook 13 and the central steel pipe jig hook 43.

[0058] Next, proceed with the laying on the right side. Lay scaffold boards 6 on the right scaffold horse 3a, and hang vertical chains 7a between the right first scaffold hook 15 and the right first steel pipe jig hook 45. Continue laying scaffold boards 6 between the right first steel pipe jig hook 45 and the right second steel pipe jig hook 44. After laying, hang diagonal chains 7 between the right first scaffold hook 15 and the right second steel pipe jig hook 44, and hang vertical chains 7a between the right second scaffold hook 14 and the right second steel pipe jig hook 44. Continue laying scaffold boards 6 between the right second steel pipe jig hook 44 and the central steel pipe jig hook 43. After laying, hang diagonal chains 7 between the right second scaffold hook 14 and the central steel pipe jig hook 43 to complete the laying of the entire scaffolding device.

[0059] During dismantling, the principle of dismantling the last structures first should be followed. The hanging chains, scaffold boards, steel pipe fixtures, and scaffolding should be removed in the reverse order of installation. Example 2

[0060] This embodiment discloses a scaffolding device under the deck of a ship, which adopts a symmetrical steel pipe fixture structure.

[0061] like Figures 2-5 As shown, the difference between this embodiment and Embodiment 1 is that: The steel pipe fixture assembly 4 adopts a symmetrical steel pipe pattern, including a left steel pipe fixture 4b and a right steel pipe fixture 4c. Both the left steel pipe fixture 4b and the right steel pipe fixture 4c have a steel pipe fixture connection hole 401 at one end and a steel pipe fixture docking hole 402 at the other end, and the steel pipe fixture docking hole 402 is an elongated hole.

[0062] During installation: The steel pipe fixture connection hole 401 of the left steel pipe fixture 4b is detachably connected to the scaffolding horse connection hole 301 of the left scaffolding horse 3; the steel pipe fixture connection hole 401 of the right steel pipe fixture 4c is detachably connected to the scaffolding horse connection hole 301 of the right scaffolding horse 3a; the steel pipe fixture docking hole 402 of the left steel pipe fixture 4b is detachably connected to the steel pipe fixture docking hole 402 of the right steel pipe fixture 4c.

[0063] In this embodiment, the steel pipe jig assembly 4 adopts a symmetrical steel pipe pattern. At the position close to the docking of the left steel pipe jig 4b and the right steel pipe jig 4c, a set of central steel pipe jig hooks 43 are respectively set. The two sets of central steel pipe jig hooks 43 are connected to the central scaffold hook 13 on the deck 1 through a vertical hanging chain 7a to ensure overall symmetrical and stable force distribution.

[0064] The remaining structure, the arrangement of the hanging chains, the laying method of the scaffold boards 6, and the installation and dismantling steps of the scaffolding device are all the same as in Example 1.

[0065] Finally, it should be noted that the above embodiments are only used to illustrate the technical solutions of the present invention, and not to limit them; although the present invention has been described in detail with reference to the foregoing embodiments, those skilled in the art should understand that modifications can still be made to the technical solutions described in the foregoing embodiments, or equivalent substitutions can be made to some or all of the technical features; and these modifications or substitutions do not cause the essence of the corresponding technical solutions to deviate from the scope of the technical solutions of the embodiments of the present invention.

Claims

1. A scaffolding device under the deck of a ship, wherein the hull bulkhead (2) is fixedly connected to the lower side of the deck (1), characterized in that: The left scaffolding eye plate (21) and the right scaffolding eye plate (22) are symmetrically arranged on both sides of the hull bulkhead (2). The left scaffolding eye plate (21) and the right scaffolding eye plate (22) are respectively connected to the left scaffolding horse (3) and the right scaffolding horse (3a) by bolts. A steel pipe fixture assembly (4) is provided between the left scaffold (3) and the right scaffold (3a). Several steel pipe fixture hooks are provided on the steel pipe fixture assembly (4), and the one located at the center of the assembly is the central steel pipe fixture hook (43). Several scaffold hooks corresponding to steel pipe jig hooks are provided on the lower surface of the deck (1), and the one at the center of the deck is the center scaffold hook (13). The central scaffold hook (13) is connected to the central steel pipe jig hook (43) only by a vertical chain (7a). The remaining scaffold hooks are connected to two sets of steel pipe jig hooks. One set is the steel pipe jig hook corresponding to the lower part of the scaffold hook, and the two are connected by a vertical chain (7a). The other set is the steel pipe jig hook adjacent to the steel pipe jig hook corresponding to the lower part of the scaffold hook and close to the center of the hull, and the two are connected by an oblique chain (7). The left scaffold (3), the right scaffold (3a) and the steel pipe jig assembly (4) constitute the support assembly, and the scaffold boards (6) are laid and tied on the support assembly.

2. The ship deck scaffolding device according to claim 1, characterized in that: The steel pipe fixture assembly (4) adopts a single steel pipe mode or a symmetrical steel pipe mode; in the single steel pipe mode, a single steel pipe fixture (4a) is used; in the symmetrical steel pipe mode, a left steel pipe fixture (4b) and a right steel pipe fixture (4c) are used.

3. The ship deck scaffolding device according to claim 2, characterized in that: The single steel pipe fixture (4a), the left steel pipe fixture (4b), and the right steel pipe fixture (4c) all have a structure with a steel pipe fixture connection hole (401) at one end and a steel pipe fixture docking hole (402) at the other end.

4. The ship deck scaffolding device according to claim 3, characterized in that: The steel pipe fixture docking hole (402) is an elongated hole.

5. The ship deck scaffolding device according to claim 4, characterized in that: When the steel pipe fixture assembly (4) adopts a single steel pipe mode, the steel pipe fixture connection hole (401) at one end of the single steel pipe fixture (4a) is detachably connected to the scaffolding connection hole (301) of the left scaffolding (3); the steel pipe fixture docking hole (402) at the other end of the single steel pipe fixture (4a) is detachably connected to the scaffolding connection hole (301) of the right scaffolding (3a).

6. The ship deck scaffolding device according to claim 5, characterized in that: When the steel pipe fixture assembly (4) adopts a symmetrical steel pipe mode, the steel pipe fixture connection hole (401) of the left steel pipe fixture (4b) and the steel pipe fixture connection hole (401) of the left scaffold (3), and the steel pipe fixture connection hole (401) of the right steel pipe fixture (4c) and the steel pipe fixture connection hole (401) of the right scaffold (3a) are detachably connected; the steel pipe fixture docking hole (402) of the left steel pipe fixture (4b) and the right steel pipe fixture (4c) are detachably connected.

7. The ship deck scaffolding device according to claim 6, characterized in that: When the steel pipe fixture assembly (4) adopts a single steel pipe mode, a set of central steel pipe fixture hooks (43) is set at the center of the single steel pipe fixture (4a); when the steel pipe fixture assembly (4) adopts a symmetrical steel pipe mode, two sets of central steel pipe fixture hooks (43) are set at the steel pipe fixture docking holes (402) of the left steel pipe fixture (4b) and the right steel pipe fixture (4c), respectively.

8. The method for laying or dismantling the ship deck scaffolding as described in claim 7, characterized in that, The laying process extends from the hull bulkhead to one side of the compartment, and includes the following steps: S1. Pre-construction preparations include: measuring the dimensions of the compartment, inspecting the quality of components, measuring oxygen and explosion levels in the compartment, and preparing the personnel for the operation. S2, the left scaffolding horse (3) is bolted to the left scaffolding eye plate (21), and the right scaffolding horse (22) is bolted to the right scaffolding eye plate (22); S3. One end of the steel pipe jig assembly (4) can be detachably installed on the left scaffold (3), and the other end can be detachably installed on the right scaffold (3a); S4. Lay scaffold boards (6) from both sides of the hull toward the center. Lay the boards on the left side. After the scaffold boards (6) are laid on the left scaffold horse (3), hang a vertical chain (7a) between the first set of scaffold hooks on the left and the corresponding first set of steel pipe jig hooks on the left. Then lay the scaffold boards (6) between the first set of steel pipe jig hooks on the left and the second set of steel pipe jig hooks on the left. After laying, hang the oblique chain (7) between the first set of scaffold hooks on the left and the second set of steel pipe jig hooks on the left. Then hang the vertical chain (7a) between the second set of scaffold hooks on the left and the second set of steel pipe jig hooks on the left. Continue until the vertical chain (7a) is hung between the center scaffold hook (13) and the center steel pipe jig hook (43). Using the same laying sequence, the scaffolding was laid on the right side of the hull to complete the laying of the scaffolding. When dismantling scaffolding, the last to be erected should be removed first, following the reverse order of installation. The hanging chains, scaffold boards, steel pipe fixtures, and scaffold horses should be removed.

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