A bow segment dock centering device

Abstract

The utility model discloses a kind of ball nose first segment in-dock centering tool, including centering plugboard subassembly and centering clamping plate subassembly, the centering plugboard subassembly is fixed on tool subsidence platform, the tool subsidence platform is fixed on ball nose first segment, the centering clamping plate subassembly is fixed on dock deck. Its technical points are: centering tool is divided into two parts, upper part is centering plugboard subassembly, lower part is centering clamping plate subassembly, centering plugboard subassembly can be installed in advance on segment, centering clamping plate subassembly is installed on dock deck after ship enters dock, segment is hoisted to the above of centering clamping plate subassembly tool, the amount of sway of segment is reduced using chain block, after centering plugboard subassembly on segment falls into corresponding centering clamping plate subassembly, accurate centering can be realized, after starting translation trolley so that each trolley is uniformly stressed, hook can be loosened, tool overall design is small and practical, can be installed by single person, accurate and fast segment positioning under floating state is realized.

Description

Technical Field

[0001] This utility model relates to the field of shipbuilding technology, and in particular to a dock-based centering tool for a bulbous bow section. Background Technology

[0002] A bulbous bow is a spherical or streamlined structure installed below the bow of a ship. Its main functions are to reduce wave-making drag, save fuel, and adapt to different speeds. By altering the water flow patterns near the bow, it reduces wave resistance during navigation, improves propulsion efficiency, and reduces main engine power requirements, thus saving energy. Some ships have bulbous bow designs optimized for specific speeds. In shipbuilding, "segmentation" refers to breaking down a complex structure into multiple modular units for segmented construction, which are then welded or assembled into a whole.

[0003] The company undertook the bulbous bow conversion project for the vessel "Nora". According to the conversion requirements, approximately 200 tons of the bow section needed to be cut down from the baseline at FR256-200 in length and 12900 mm in height. A brand new, energy-efficient bulbous bow section, weighing approximately 160 tons, would be installed at the corresponding location. The shipowner gave the company a tight timeframe for this conversion project; the bow section needed to be docked immediately after entering the shipyard and then shipped out of the shipyard immediately after leaving the dock. Excluding initial production preparations and subsequent painting work, the cold working workshop only had 6 days to complete the replacement bulbous bow section. To complete the dock work on schedule, it was crucial to compress the timelines of each stage. One critical step was the precise alignment and rapid hook release during dock lifting. Failure to achieve rapid hook release would directly affect subsequent translation and positioning installation, inevitably impacting the entire dock schedule.

[0004] The entire bulbous bow section, including reinforcement, weighs approximately 190 tons. The company used a 1600-ton floating crane for lifting. However, the floating crane swayed significantly during the lifting process, making it impossible to successfully place the section in one go. The section also needed to be moved approximately 15 meters in length within the dock. If the center of the section deviated from the original center of the ship, it would affect the overall assembly accuracy and could lead to extensive structural and outer plate repairs.

[0005] Therefore, we propose a centering fixture for the bulb nose segment in the dock to solve the problems mentioned above. Utility Model Content

[0006] Technical problems to be solved:

[0007] To address the shortcomings of existing technologies, this utility model provides a dock-based centering fixture for the bulbous bow section. The fixture consists of two parts: an upper centering insert plate assembly and a lower centering clamping plate assembly. The centering insert plate assembly can be pre-installed on the section, while the centering clamping plate assembly is installed on the dock deck after the ship enters the dock. The section is then hoisted onto the centering clamping plate fixture, and a hand-operated hoist is used to reduce the sway of the section. Once the centering insert plate assembly on the section falls into the corresponding centering clamping plate assembly, precise centering can be achieved. After the translation trolley is activated to distribute the force evenly across all trolleys, the hook can be released. The fixture is compact and practical, allowing for single-person installation and enabling precise and rapid placement of sections in a floating state, thus solving the technical problems mentioned in the background art.

[0008] Technical solution:

[0009] To achieve the above objectives, this utility model provides the following technical solution:

[0010] A dock-based centering fixture for a bulbous bow section includes a centering insert assembly and a centering clamping plate assembly. The centering insert assembly is fixedly mounted on a fixture sinking platform, which is fixed to the bulbous bow section. The centering clamping plate assembly is fixedly mounted on the dock deck. The upper part of the centering insert assembly is pre-installed on the section, while the lower part of the centering clamping plate assembly is installed after the ship enters the dock. After the ship enters the dock, the approximate location of the centering fixture is marked out on the dock deck. A plumb line is used to find the theoretical centerline of the original ship, and a laser theodolite is used to extend a sufficient length towards the bow. The two centering clamping plate assemblies are installed at the pre-marked locations, one at the front and one at the rear. The centering clamping plate assemblies are checked using a plumb line before being hoisted into sections. The centering insert assembly includes a fixed base, and a clamping seat is provided at the lower end of the fixed base. Both sides of the clamping seat have a first inclined surface, and the lower end of the clamping seat has a... The first centering block has a second centering block at its lower end. The centering plate assembly includes a centering seat and a supporting column. The centering seat and the supporting column are connected by an adjusting seat. The centering seat includes a base with a first centering groove at its bottom. Limiting blocks are slidably arranged on both sides inside the base. Each limiting block includes a second inclined surface. A spring is installed on one side of each limiting block and is fixedly connected to a mounting plate. A third centering block is provided at the lower end of the base. The third centering block includes a second centering groove. The first centering block is embedded in the first centering groove, and the second centering block is embedded in the second centering groove. The second centering block of the centering insert plate assembly is first embedded in the second centering groove of the centering plate assembly to achieve primary centering positioning. Then, the first centering block of the centering insert plate assembly is embedded in the first centering groove of the centering plate assembly to achieve secondary centering positioning.

[0011] In one possible implementation, slide rails are fixedly provided on both sides of the bottom of the base, and a groove is provided at the bottom of the limiting block, with the slide rails and the grooves being slidably connected.

[0012] In one possible implementation, the slope of the first inclined plane is the same as that of the second inclined plane, and the centering seat has a self-locking structure that enables self-locking after rapid positioning and centering. The centering insert assembly is locked by the self-locking force, which improves the stability of the tooling after centering and prevents the centering insert assembly and the centering clamping plate assembly from moving relative to each other after centering, thus ensuring centering accuracy.

[0013] In one possible implementation, the second centering block is configured as a cross-shaped structure, and the second centering groove is configured as a cross-shaped structure. Compared with the plate structure, the cross-shaped structure has higher alignment accuracy.

[0014] In one possible implementation, side plates are installed at both ends of the base, and the side plates are fixedly connected to the base by a first bolt. The connection between the side plates and the base is detachable. Loosening the first bolt at the corner can release the fastening between the side plates and the base.

[0015] In one possible implementation, the mounting plate and the side plate are fixedly connected by a second bolt. The mounting plate and the side plate are detachable. Loosening the second bolt releases the fastening between the mounting plate and the side plate. When it is necessary to remove the centering insert assembly from the centering clamping plate assembly, first loosen the first bolt at the corner, then loosen the second bolt. This allows the side plate to be removed and the mounting plate to be moved, thereby moving the position of the limiting block and disengaging the self-locking of the centering insert assembly.

[0016] In one possible implementation, diagonal supports are welded and fixed to both sides of the supporting column, the centering plate assembly is welded and fixedly connected to the tooling sinking platform, and the centering clamping plate assembly is welded and fixedly connected to the dock deck. The diagonal supports enhance the stability of the supporting column structure, transfer loads, and control deformation, forming a triangular stable system, suppressing lateral displacement of the structure, and improving the stability of the support.

[0017] In one possible implementation, a base plate is fixedly provided at the bottom of the centering seat, and guide slide rods are fixedly provided on both sides of the lower end face of the base plate.

[0018] In one possible implementation, a lead screw is mounted on the adjusting seat, the lead screw is threadedly connected to the adjusting seat, one end of the lead screw is connected to the base plate via a bearing, and a handwheel is fixedly mounted on one end of the lead screw.

[0019] In one possible implementation, sliding sleeves are provided on both sides of the upper surface of the adjusting seat. The guide slide rod of the base plate passes through the sliding sleeve and is slidably connected with the sliding sleeve. When a tool is used or the handwheel is turned manually, the lead screw can be driven to rotate. When the lead screw rotates, it drives the guide slide rod of the centering seat to slide along the sliding sleeve of the adjusting seat, thereby adjusting the position of the centering seat.

[0020] Compared with the prior art, the beneficial effects of this utility model are:

[0021] 1. This utility model is divided into two parts: the upper part is the centering insert plate assembly, and the lower part is the centering clamping plate assembly. The centering insert plate assembly can be installed on the section in advance. The centering clamping plate assembly is installed on the dock deck after the ship enters the dock. The section is hoisted above the centering clamping plate assembly tooling. The sway of the section is reduced by using a hand chain hoist. After the centering insert plate assembly on the section falls into the corresponding centering clamping plate assembly, accurate centering can be achieved. After the translation trolley is started to make each trolley evenly stressed, the hook can be released.

[0022] 2. The tooling of this utility model is compact and practical in overall design, and can be installed by a single person. The tooling can be accurately and quickly positioned in a floating state, enabling the large floating crane to be quickly released, saving the cost of using the floating crane, laying the foundation for dock modification and dock period control, and enabling the completion of dock tasks on schedule.

[0023] 3. The centering seat of this utility model has a self-locking structure, which can achieve self-locking after rapid positioning and centering. It relies on the self-locking force to lock the centering insert plate assembly, improve the stability of the tooling after centering, prevent the centering insert plate assembly and the centering clamping plate assembly from moving relative to each other after centering, and ensure centering accuracy.

[0024] 4. An adjustment seat is added between the support column and the centering seat of this utility model. When the centering clamping plate assembly is fixed and the height position of the upper centering seat needs to be adjusted, there is no need to remove the entire centering clamping plate assembly and reinstall it. The height position of the upper centering seat can be adjusted by adjusting the adjustment seat, which improves the flexibility of the centering tooling in use. Attached Figure Description

[0025] The above description is only an overview of the technical solution of this utility model. In order to better understand the technical means of this utility model and to implement it in accordance with the contents of the specification, the preferred embodiments of this utility model are described in detail below with reference to the accompanying drawings.

[0026] Figure 1 This is a top view structural diagram of the centering insert plate assembly and the centering clamping plate assembly of this utility model;

[0027] Figure 2 This is a bottom view structural diagram of the centering insert plate assembly and the centering clamping plate assembly of this utility model;

[0028] Figure 3 This is a three-dimensional structural diagram of the centering insert plate assembly and the centering clamping plate assembly of this utility model;

[0029] Figure 4 This is a schematic diagram of the installation of the centering insert plate assembly and the centering clamping plate assembly of this utility model;

[0030] Figure 5 for Figure 4 Enlarged view of a portion of area A in the middle;

[0031] Figure 6 This is a partial cross-sectional view of the centering plate assembly of this utility model;

[0032] Figure 7 This is a cross-sectional view of the center seat of this utility model;

[0033] Figure 8 This is a schematic diagram of the centering of this utility model. Figure 1 ;

[0034] Figure 9 This is a schematic diagram of the centering of this utility model. Figure 2 ;

[0035] Figure 10 This is a schematic diagram of the centering of this utility model. Figure 3 .

[0036] In the diagram: 1. Centering insert plate assembly; 2. Centering clamping plate assembly; 3. Tooling sinking platform; 4. Dock deck; 11. Fixed seat; 12. Clamping seat; 13. First centering block; 14. Second centering block; 15. First inclined surface; 21. Centering seat; 22. Support column; 23. Adjusting seat; 24. Diagonal support; 211. Base; 212. Limiting block; 213. Second inclined surface; 214. Spring; 215. Mounting plate; 216. Slide rail; 217. First centering groove; 218. Third centering block; 219. Second centering groove; 2110. Side plate; 2111. First bolt; 2112. Second bolt; 2113. Base plate; 2114. Guide slide rod; 231. Lead screw; 232. Handwheel; 233. Sliding sleeve. Detailed Implementation

[0037] This application provides a dock-based centering fixture for the bulbous bow section. The fixture consists of two parts: an upper centering insert assembly and a lower centering clamping plate assembly. The centering insert assembly can be pre-installed on the section, while the centering clamping plate assembly is installed on the dock deck after the ship enters the dock. The section is then hoisted onto the centering clamping plate fixture, and a hand-operated hoist is used to reduce the sway of the section. Once the centering insert assembly on the section falls into the corresponding centering clamping plate assembly, precise centering is achieved. After the translation trolley is activated to distribute the force evenly across all trolleys, the hook can be released. The fixture is compact and practical, allowing for single-person installation and enabling precise and rapid placement of sections in a floating state, thus solving the technical problems mentioned in the background art.

[0038] The technical solution in this application embodiment is to solve the problems mentioned in the background art, and the overall idea is as follows:

[0039] Example 1:

[0040] Please see Figure 1-10 This utility model provides a technical solution: a centering fixture for a bulbous bow segment in a dock, comprising a centering insert plate assembly 1 and a centering clamping plate assembly 2. The centering insert plate assembly 1 is installed and fixed on a fixture sinking platform 3, which is fixed on the bulbous bow segment. The centering clamping plate assembly 2 is installed and fixed on a dock deck 4. The centering insert plate assembly 1 includes a fixing seat 11, a clamping seat 12 at the lower end of the fixing seat 11, first inclined surfaces 15 on both sides of the clamping seat 12, a first centering block 13 at the lower end of the clamping seat 12, and a second centering block 14 at the lower end of the first centering block 13. The centering clamping plate assembly 2 includes a centering seat 21 and a supporting column. 22. The centering seat 21 and the support column 22 are connected by an adjusting seat 23. The centering seat 21 includes a base 211. The bottom of the base 211 is provided with a first centering groove 217. Limiting blocks 212 are slidably provided on both sides inside the base 211. The limiting blocks 212 include a second inclined surface 213. A spring 214 is installed on one side of the limiting block 212. The spring 214 is fixedly connected to the mounting plate 215. A third centering block 218 is provided at the lower end of the base 211. The third centering block 218 includes a second centering groove 219. The first centering block 13 is embedded in the first centering groove 217, and the second centering block 14 is embedded in the second centering groove 219.

[0041] The centering fixture is divided into two parts: the upper part is the centering insert plate assembly 1, and the lower part is the centering clamping plate assembly 2. The upper centering insert plate assembly 1 can be installed in advance on the section, while the lower centering clamping plate assembly 2 needs to be installed after the ship enters the dry dock. After the ship enters the dry dock, the approximate location of the centering fixture is marked out at point 4 on the dry dock deck. The theoretical centerline of the original ship is found using a plumb bob, and a laser theodolite is used to extend a sufficient length towards the bow. The two centering clamping plate assemblies 2 are installed at the pre-marked locations, one at the front and one at the rear. The centering clamping plate assembly 2 is checked using a plumb bob, with the accuracy controlled within ±2mm. Then, the sections are hoisted and installed. The sections are hoisted onto the centering clamping plate assembly 2. A hand-operated hoist is used to reduce the sway of the sections. Once the centering insert plate assembly 1 on each section falls into the corresponding centering clamping plate assembly 2, precise centering can be achieved. After the translation trolley is started to distribute the force evenly among the trolleys, the hook can be released. The overall design of this fixture is compact and practical, and it can be installed by a single person. The fixture enables precise and rapid placement of the sections in a floating state, and allows for rapid hook release of the large floating crane, saving on the operating cost of the floating crane. It lays the foundation for dock-time control during dock modification and can complete dock-time tasks on schedule. The translation trolley is selected with integrated lifting function, which can lift and move horizontally to meet the closure requirements.

[0042] During alignment, the alignment insert assembly 1 falls while the alignment clamping assembly 2 remains stationary. The second alignment block 14 of the alignment insert assembly 1 first embeds into the second alignment slot 219 of the alignment clamping assembly 2, achieving primary alignment positioning. Then, the alignment insert assembly 1 continues to fall, and the first alignment block 13 of the alignment insert assembly 1 embeds into the first alignment slot 217 of the alignment clamping assembly 2, achieving secondary alignment positioning. Through the alignment cooperation between the second alignment slot 219 and the second alignment block 14, and between the first alignment slot 217 and the first alignment block 13, precise alignment positioning is achieved. The two alignment positioning operations improve the alignment accuracy. If a part of the alignment insert assembly 1 is damaged due to deformation, it cannot achieve smooth alignment. Similarly, if a part of the alignment clamping assembly 2 is damaged due to deformation, it cannot achieve smooth alignment. This ensures the accurate placement of the segments and prevents alignment positioning errors.

[0043] In some examples, slide rails 216 are fixedly provided on both sides of the bottom of the base 211, and the bottom of the limiting block 212 is provided with a sliding groove. The slide rails 216 and the sliding groove are slidably connected. Both sets of limiting blocks 212 can slide along the slide rails 216 under the drive of external force, and the slide rails 216 guide the two sets of limiting blocks 212.

[0044] In some examples, the slope of the first inclined plane 15 is the same as the slope of the second inclined plane 213.

[0045] A self-locking structure is added above the first pair of middle slots 217 and the second pair of middle slots 219, such as... Figure 3 , Figure 8 , Figure 9 and Figure 10 As shown, when the centering plate assembly 1 falls, the first inclined surface 15 of the centering plate assembly 1's mounting base 12 first contacts the second inclined surface 213 of the limiting block 212, and during the continuous falling process, it squeezes the second inclined surface 213 of the limiting block 212. The external force on the second inclined surface 213 of the limiting block 212 is transmitted to the spring 214, and the spring 214 is compressed. The limiting block 212 slides along the slide rail 216 to avoid the pressure. When the second centering block 14 is embedded in the second centering groove 219, the first centering block 13 is embedded in the first centering groove 217. When the first inclined surface 15 of the card holder 12 just leaves the second inclined surface 213 of the limiting block 212, the external force applied to the second inclined surface 213 of the limiting block 212 disappears, and the spring 214 rebounds and resets by its own rebound force, driving the two sets of limiting blocks 212 to rebound and reset synchronously. The card holder 12 is locked and fixed by the two sets of limiting blocks 212, realizing self-locking after quick positioning and centering. The self-locking force improves the stability of the tooling after centering, avoids relative movement between the centering insert assembly 1 and the centering card plate assembly 2 after centering, and ensures centering accuracy.

[0046] In some examples, the second centering block 14 is configured as a cross-shaped structure, and the second centering slot 219 is configured as a cross-shaped structure. The cross-shaped structure has higher alignment accuracy compared to the plate structure.

[0047] In some examples, side plates 2110 are installed at both ends of the base 211, and the side plates 2110 are fixedly connected to the base 211 by first bolts 2111.

[0048] In some examples, the mounting plate 215 is fixedly connected to the side plate 2110 by a second bolt 2112.

[0049] like Figure 7As shown, the side plate 2110 and the base 211 are detachably connected. Loosening the first bolt 2111 at the corner releases the fastening between the side plate 2110 and the base 211. The mounting plate 215 and the side plate 2110 are also detachably connected. Loosening the second bolt 2112 releases the fastening between the mounting plate 215 and the side plate 2110. When it is necessary to remove the centering insert assembly 1 from the centering clamping plate assembly 2, first loosen the first bolt 2111 at the corner, then loosen the second bolt 2112. The side plate 2110 can be disassembled and the mounting plate 215 can be moved, thereby moving the position of the limiting block 212. The limiting block 212 is moved out of the self-locking position, releasing the self-locking of the centering insert plate assembly 1. At this time, the centering insert plate assembly 1 can be moved out of the centering clamping plate assembly 2, realizing the separation of the centering insert plate assembly 1 and the centering clamping plate assembly 2. Alternatively, the two sets of limiting blocks 212 can be connected to a hydraulic assembly, and the limiting block 212 can be moved by the hydraulic assembly to move out of the self-locking position and release the self-locking force. This can be selectively set according to actual usage requirements.

[0050] In some examples, diagonal supports 24 are welded and fixed on both sides of the support column 22, the centering plate assembly 1 is welded and fixedly connected to the tooling sinking platform 3, and the centering clamping plate assembly 2 is welded and fixedly connected to the dock deck 4. The diagonal supports 24 enhance the stability of the support column 22 structure, transfer loads and control deformation, form a triangular stable system, suppress lateral displacement of the structure and improve support stability.

[0051] By adopting the above technical solution:

[0052] The centering fixture is divided into two parts: the upper part is the centering insert plate assembly 1, and the lower part is the centering clamping plate assembly 2. The centering insert plate assembly 1 can be installed on the section in advance. The centering clamping plate assembly 2 is installed on the dock deck 4 after the ship enters the dock. The section is hoisted onto the centering clamping plate assembly 2 fixture. The sway of the section is reduced by using a hand-operated hoist. Once the centering insert plate assembly 1 on the section falls into the corresponding centering clamping plate assembly 2, precise centering can be achieved. After starting the translation trolley to make each trolley evenly stressed, the hook can be released.

[0053] The tooling is compact and practical in design, and can be installed by a single person. The tooling enables precise and rapid segmented placement in a floating state, and allows for quick release of the hook from a large floating crane, saving on the operating costs of the floating crane. It lays the foundation for dockside modification and dock period control, and can complete dockside tasks on schedule.

[0054] The centering seat 21 has a self-locking structure, which can achieve self-locking after rapid positioning and centering. It locks the centering insert plate assembly 1 by relying on the self-locking force, improves the stability of the tooling after centering, avoids relative movement between the centering insert plate assembly 1 and the centering clamping plate assembly 2 after centering, and ensures centering accuracy.

[0055] Example 2:

[0056] Based on Example 1, this example introduces the specific structure of the adjusting seat 23 in the centering tooling inside the segmented dock of the bulb nose. A base plate 2113 is fixedly installed at the bottom of the centering seat 21, and guide slide rods 2114 are fixedly installed on both sides of the lower end face of the base plate 2113.

[0057] In some examples, a lead screw 231 is mounted on the adjusting seat 23, and the lead screw 231 is threadedly connected to the adjusting seat 23. One end of the lead screw 231 is connected to the base plate 2113 via a bearing, and a handwheel 232 is fixedly mounted on one end of the lead screw 231.

[0058] In some examples, sliding sleeves 233 are provided on both sides of the upper surface of the adjusting seat 23, and the guide rod 2114 of the base plate 2113 passes through the sliding sleeve 233 and is slidably connected with the sliding sleeve 233.

[0059] When using a tool or manually turning the handwheel 232, the lead screw 231 can be driven to rotate. When the lead screw 231 rotates, it drives the guide slide 2114 of the centering seat 21 to slide along the slide sleeve 233 of the adjusting seat 23, thereby adjusting the position of the centering seat 21.

[0060] By adopting the above technical solution:

[0061] An adjustment seat 23 is added between the support column 22 and the centering seat 21. When the centering clamping plate assembly 2 is fixed and the height position of the upper centering seat 21 needs to be adjusted, there is no need to remove the entire centering clamping plate assembly 2 and reinstall it. The height position of the upper centering seat 21 can be adjusted by adjusting the adjustment seat 23, which improves the flexibility of the centering tooling in use.

[0062] Finally, it should be noted that the above embodiments are merely examples for clearly illustrating the present invention and are not intended to limit the implementation. Those skilled in the art can make other variations or modifications based on the above description. It is neither necessary nor possible to exhaustively list all possible implementations. However, obvious variations or modifications derived therefrom are still within the protection scope of this invention.

Claims

1. A bow section docking alignment tool comprising an alignment insert plate assembly (1) and an alignment spacer plate assembly (2), characterised in that: The centering insert assembly (1) is installed and fixed on the tooling sinking platform (3), which is fixed on the bulbous nose section. The centering clamping plate assembly (2) is installed and fixed on the dock deck (4). The centering insert assembly (1) includes a fixed seat (11), and a clamping seat (12) is provided at the lower end of the fixed seat (11). A first inclined surface (15) is provided on both sides of the clamping seat (12). A first centering block (13) is provided at the lower end of the clamping seat (12), and a second centering block (14) is provided at the lower end of the first centering block (13). The centering clamping plate assembly (2) includes a centering seat (21) and a supporting column (22). The centering seat (21) and the supporting column (22) are connected by an adjusting seat (2). 3) Connection, the centering seat (21) includes a base (211), the bottom of the base (211) is provided with a first centering groove (217), the two sides inside the base (211) are slidably provided with limit blocks (212), the limit blocks (212) include a second inclined surface (213), a spring (214) is installed on one side of the limit blocks (212), the spring (214) is fixedly connected to the mounting plate (215), the lower end of the base (211) is provided with a third centering block (218), the third centering block (218) includes a second centering groove (219), the first centering block (13) is embedded in the first centering groove (217), and the second centering block (14) is embedded in the second centering groove (219).

2. A segmented bow docking alignment tool according to claim 1, wherein: The base (211) has slide rails (216) fixedly installed on both sides of the bottom end. The bottom of the limiting block (212) has a sliding groove, and the slide rails (216) are slidably connected to the sliding groove.

3. A segmented bow docking guide according to claim 1, wherein: The slope of the first inclined plane (15) is the same as that of the second inclined plane (213).

4. A bow nose section in-dock alignment tool as claimed in claim 1, characterized in that: The second pair of center blocks (14) is configured as a cross-shaped structure, and the second pair of center slots (219) is configured as a cross-shaped structure.

5. A bow nose section in-dock alignment tool as claimed in claim 1, wherein: Both ends of the base (211) are equipped with side plates (2110), and the side plates (2110) are fixedly connected to the base (211) by a first bolt (2111).

6. The centering fixture for the bulb nose segment in the dock according to claim 5, characterized in that: The mounting plate (215) and the side plate (2110) are fixedly connected by a second bolt (2112).

7. The centering fixture for the bulb nose segment in the dock according to claim 1, characterized in that: Both sides of the support column (22) are welded and fixed with diagonal supports (24), the centering insert plate assembly (1) is welded and fixedly connected to the tooling sinking platform (3), and the centering clamping plate assembly (2) is welded and fixedly connected to the dock deck (4).

8. The centering fixture for the bulb nose segment in the dock according to claim 1, characterized in that: The bottom of the centering seat (21) is fixedly provided with a base plate (2113), and guide slide rods (2114) are fixedly provided on both sides of the lower end face of the base plate (2113).

9. The centering fixture for the bulb nose segment in the dock according to claim 8, characterized in that: A lead screw (231) is installed on the adjusting seat (23). The lead screw (231) is threadedly connected to the adjusting seat (23). One end of the lead screw (231) is connected to the base plate (2113) through a bearing. A handwheel (232) is fixedly installed on one end of the lead screw (231).

10. The centering fixture for the bulb nose segmented dock according to claim 9, characterized in that: Both sides of the upper surface of the adjusting seat (23) are provided with sliding sleeves (233), and the guide rod (2114) of the base plate (2113) passes through the sliding sleeve (233) and is slidably connected with the sliding sleeve (233).

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