Quick positioning and installation method for apron structure

Abstract

The application discloses a kind of skirt board structure quick positioning installation methods, including the following steps: first, fixed quick loading tool on skirt board structure deck, subsequently according to its transverse installation position, fixed auxiliary positioning board on the main hull pontoon deck;Length and along the direction of the measurement of pin shaft hole on the tongue-shaped plate of skirt board structure upper segment and the tongue-shaped plate on the pontoon, draw positioning line on quick loading tool and cut or pad the bottom of its protruding section;Skirt board structure is hoisted, and quick loading tool free end is loaded on pontoon deck, and is closely attached to auxiliary positioning board, while the above-mentioned drawn positioning line is aligned with the plate edge of the main hull pontoon deck;Construction personnel inserts pin shaft into corresponding pin shaft hole and is fixed, and skirt board structure installation is completed.The application has simple operation process, can realize quick and accurate positioning butt joint, greatly reduces the time occupied by dock crane, improves dock production efficiency and safety, saves production economic cost and time cost.

Description

Technical Field

[0001] This invention relates to the field of shipbuilding technology, and more specifically to a method for rapid positioning and installation of skirt structure. Background Technology

[0002] The skirt structure of a floating dock is generally located at the bow / stern end of the floating dock's pontoon deck, with its upper surface flush with the pontoon deck. It is installed on the edge of the pontoon via welding or mechanical connection. Under current technological conditions, the following methods are typically used to install the bow / stern end skirt structure of the floating dock:

[0003] The first step is to pre-install support fixtures at the bottom of the dry dock along the edge of the floating box deck, based on the installation location and structural form of the skirt structure. Figure 1 As shown; the second step is to hoist the skirt structure to the installation position. If there is a gap between the support fixture and the skirt structure, adjust the height of the support fixture under the skirt structure to provide support; the third step is to fine-tune the position of the skirt structure along the length, width and height of the floating dock using a crane and assembly tools. After measuring to meet the installation accuracy requirements, complete the assembly welding or mechanical connection work.

[0004] The above installation method has the following main problems:

[0005] 1. The floating dock skirt structure is divided into several independent sections, each of which is assembled with the main hull pontoons. Each independent section requires four support points. Taking a certain type of 93,500-ton lifting capacity floating dock as an example, its pontoons have a total of 18 independent skirt structure sections at the bow and stern. During the skirt structure assembly process, 56 support fixtures are required. Because the skirt structure installation position is several meters above the dry dock bottom, the required support fixtures are large in size, and the installation process requires the assistance of cranes, forklifts, and other construction machinery, resulting in high construction costs and a long operation period.

[0006] 2. After the skirt structure is hoisted to the closing position in sections, if the height of the support fixtures is significantly off, the height of the support fixtures needs to be adjusted again, which increases the closing and assembly construction period; in addition, construction personnel need to work under the skirt structure, which poses a safety hazard.

[0007] 3. For skirt sections that are mechanically connected to the pontoon structure using pins, the pontoon tongue plate must be inserted between two skirt tongue plates, and the pin holes on all tongue plates must be aligned before the pin can be inserted. Because construction personnel cannot directly observe the insertion of the tongue plates and the alignment of the pin holes during hoisting operations, the pin insertion process is difficult.

[0008] 4. The segmented assembly and installation of the skirt structure requires the cooperation of cranes and assembly workers, which increases the time occupied by the core production resources (cranes) of the dock and prolongs the overall dock period for the construction of the floating dock structure.

[0009] 5. If the skirt pins of the floating dock need to be disassembled for inspection and repair, the above steps need to be repeated many times throughout the life cycle of the floating dock, which reduces the operating efficiency of the floating dock and increases the operating cost of the floating dock.

[0010] In summary, existing methods for positioning and installing skirting structures have drawbacks such as poor convenience, low efficiency, high construction costs, and insufficient safety. Summary of the Invention

[0011] The purpose of this invention is to overcome the shortcomings of the existing technology and provide a method for rapid positioning and installation of skirting structures.

[0012] To solve the above-mentioned technical problems, the technical solution adopted by the present invention is as follows:

[0013] A method for rapid positioning and installation of a skirt structure includes the following steps:

[0014] S1. Before each skirt structure section is joined together, at least two quick-mounting fixtures are fixed at intervals at the deck joining joint position, extending out of the skirt structure joining surface; then, according to the lateral installation position of the quick-mounting fixtures, auxiliary positioning plates are fixedly installed on the main hull pontoon deck.

[0015] S2. Measure the length of the pin holes on the segmented tongue plates of the skirt structure and the tongue plates of the floating box structure respectively, and then mark the corresponding positions on the quick-mounting fixture; at the same time, measure the height of the pin holes on the tongue plates, and combine the difference between the two height data to cut or raise the bottom of the protruding section of the quick-mounting fixture.

[0016] S3. Hoist the skirt structure so that the free end of the tooling that can be quickly mounted on it rests on the above-mentioned floating box deck and is in close contact with the above-mentioned auxiliary positioning plate.

[0017] S4. Move the hoisted skirt structure along the length of the ship toward the main hull pontoon, and tighten the quick-mounting fixture by pulling the left and right screws on the main hull pontoon deck, so that the positioning line that can be drawn on the quick-mounting fixture in step S2 is aligned with the edge of the main hull pontoon deck.

[0018] S5. The construction workers insert the pin into the corresponding pin hole and fix it; the crane slowly releases the hook to make the pin bear the force, and after reaching a stable state, the crane releases the hook, and the skirt structure installation is completed.

[0019] Furthermore, the quick-mounting fixture is a plate-shaped structure, longitudinally welded and fixed to the deck of the skirt structure, perpendicular to it; the upper edge of the free end of the quick-mounting fixture is provided with a hook groove; the quick-mounting fixture extends out of the lower edge of the skirt structure to perform cutting or raising operations.

[0020] Furthermore, the auxiliary positioning plate is also a plate-shaped structure, vertically welded and fixed to the floating box deck, perpendicular to it, and also perpendicular to the aforementioned quick-assembly fixture. When the two are assembled together, the auxiliary positioning plate is located on the outside of the quick-assembly fixture.

[0021] Furthermore, in step S1, the installation position of the auxiliary positioning plate is measured by using a total station to measure the lateral installation position of the quick-mounting tool.

[0022] Furthermore, in step S2, a total station is first used to measure the vertical length L1 of the distance between the center of the pin hole on the tongue plate of the pontoon and the edge of the pontoon deck. Then, based on this length L1, the vertical position of the center of the pin hole on each segment of the tongue plate on the skirt structure is measured to be the same length L1, and a positioning line is drawn at the corresponding position on the quick-mounting fixture.

[0023] Furthermore, in step S2, the vertical distance H2 between the center of the pin hole on the tongue plate of the pontoon and the upper surface of the pontoon deck is first measured using a total station. Then, the vertical distance H1 between the center of the pin hole on the segmented tongue plate of the skirt structure and the lower edge of the quick-mounting fixture is measured. Finally, the lower edge of the free end of the quick-mounting fixture is cut or raised so that H1 and H2 are equal.

[0024] Furthermore, a fixing block is fixed on the floating box deck, corresponding to the setting position of the aforementioned quick-mounting fixture. One end of the left and right lead screws is connected to the fixing block, and the other end is hooked to the hook groove of the quick-mounting fixture. The skirt structure is pulled towards the floating box by adjusting the left and right lead screws.

[0025] Compared with the prior art, the present invention has the following beneficial effects:

[0026] 1. This construction method does not require the setting of skirt board closing support fixtures, which reduces the construction preparation process and saves production economic and time costs. Precise positioning and docking can be achieved by using only quick mounting fixtures and auxiliary positioning plates.

[0027] 2. All heat-related and mechanical processing operations in this construction method, such as the welding and height trimming of quick-assembly fixtures, the welding of auxiliary positioning plates, and the precision machining of pin holes, can be completed before the skirt structure is assembled, eliminating the need for on-site construction during assembly and effectively reducing construction difficulty.

[0028] 3. This construction method is low-cost, requires no scaffolding, aerial work platforms or other equipment, and has a simple installation and dismantling process;

[0029] 4. This construction method greatly reduces the time that dock cranes occupy, thus improving the overall efficiency of dock production.

[0030] 5. With this construction method, construction personnel do not need to enter the narrow area between the skirt structures, nor do they need to go under the skirt structures to adjust the height of the support fixtures. Similarly, they do not need to directly observe the insertion of the tongue plate and the alignment of the pin holes. The installation of the skirt structure can be completed on the floating box deck, which has high safety and high installation efficiency. Attached Figure Description

[0031] Figure 1 This is a schematic diagram of an existing skirting structure installation scheme;

[0032] Figure 2 This is a schematic diagram of the skirt panel structure installation scheme of the present invention;

[0033] Figure 3 This is a schematic diagram of the connection and assembly between the skirt structure and the main hull pontoon in this invention;

[0034] Figure 4 This is a schematic diagram showing the marking of the positioning line between the segmented skirt structure and the main hull pontoon in this invention, as well as the installation, measurement, and trimming in the length and height directions.

[0035] Figure 5 This is a schematic diagram showing the mounting and fitting relationship between the segmented skirt structure and the main hull pontoons in this invention;

[0036] Figure 6 This is a top view of the segmented skirt structure and the main hull pontoon in this invention.

[0037] Figure 7 This is a schematic diagram of the positioning and installation of the auxiliary positioning plate on the main hull pontoon in this invention;

[0038] Figure 8 This is a schematic diagram illustrating a practical application scenario of the present invention;

[0039] In the diagram: 1. Main hull pontoon, 2. Skirt structure, 3. Segmented tongue plate, 4. Tongue plate, 5. Pin, 6. Quick-mount tooling, 7. Pontoon deck, 8. Pontoon deck edge, 9. Left and right lead screws, 10. Fixing block, 11. Positioning line, 12. Pin hole, 13. Auxiliary positioning plate, 14. Positioning plate installation line, 15. Theoretical line of the outer tongue plate of the skirt, 61. Hook groove, 62. Lower edge of the mounting. Detailed Implementation

[0040] It should be noted that in the description of this invention, terms such as "upper", "lower", "front", "rear", "left", "right", "vertical", and "vertical direction" indicate the orientation or positional relationship based on the orientation or positional relationship shown in the accompanying drawings. These terms are only used to facilitate the description of the structural relationship between the components in this invention and do not specifically mean that any component in this invention must have a specific orientation, be constructed and operated in a specific orientation, or be construed as a limitation of this invention.

[0041] Furthermore, unless otherwise explicitly specified and limited, the terms "set up," "install," "connect," and "link" 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. Those skilled in the art can understand the specific meaning of the above terms in this invention based on the specific circumstances.

[0042] The specific embodiments of the present invention will be described in further detail below with reference to the accompanying drawings:

[0043] A method for rapid positioning and installation of a skirt panel structure, such as Figure 2 As shown, the assembly of the segmented skirt structure 2 onto the main hull pontoon 1 includes the following steps:

[0044] S1. After the segmented construction of the skirt structure 2 is completed, before its segmented assembly and installation, two quick-assembly fixtures 6 are welded and fixed at intervals at the deck closure joint of each skirt structure 2. Each quick-assembly fixture 6 is a plate-shaped structure, with one half longitudinally welded and fixed to the deck of the skirt structure 2, perpendicular to it, and the other end extending out of the closure surface of the skirt structure 2. It can be mounted on the main hull pontoon 1 during the installation of the skirt structure 2, serving as temporary support and auxiliary positioning. The upper edge of the protruding section of the quick-assembly fixture 6 is also provided with a hook groove 61. Then refer to Figure 7 As shown, based on the lateral installation position of the quick-mounting fixture 6, the theoretical line 15 of the outer tongue plate of the skirt is measured using a total station, and its position is marked on the floating deck 7 to form the mounting plate positioning line 14. Then, the auxiliary positioning plate 13 is welded and fixed to the floating deck 7 close to the positioning line. The auxiliary positioning plate 13 also adopts a plate structure and is vertically welded and fixed to the floating deck 7, which is perpendicular to it and also perpendicular to the quick-mounting fixture 6 mentioned above.

[0045] S2, Combination Figure 4As shown, the length of the pin hole 12 on the segmented tongue plate 3 on the skirt structure 2 and the tongue plate 4 on the main hull pontoon 1 is measured. First, the vertical length L1 of the center of the pin hole on the tongue plate 4 on the pontoon pontoon 1 from the edge 8 of the pontoon deck is measured using a total station. Then, based on this length L1, the vertical position of the center of the pin hole on the segmented tongue plate 3 on the skirt structure 2 is measured to be the same length L1, and the corresponding positioning line 11 is marked on the quick-mounting fixture 6. Simultaneously, the pin holes 12 on each of the above-mentioned tongue plates are measured along the height direction. Similarly, using a total station, the vertical height distance H2 between the center of the pin hole on the tongue plate 4 of the pontoon and the upper surface of the pontoon deck 7 is first measured; then the vertical height distance H1 between the center of the pin hole on the segmented tongue plate 3 of the skirt structure 2 and the lower edge 62 of the quick-mounting fixture 6 is measured. If there is no difference between H1 and H2, the skirt structure 2 can be directly assembled with the main hull pontoon 1. If there is a height difference between H1 and H2, the lower edge 62 of the free end of the quick-mounting fixture 6 is cut or raised to make H1 and H2 equal, eliminating the height difference between them, and then the skirt structure 2 is assembled with the main hull pontoon 1. At this time, the centers of the pin holes on the segmented tongue plate 3 and the tongue plate 4 of the main hull pontoon are at the same height.

[0046] S3. Hoist and move the skirt structure 2 so that the free end of the quick-mounting tool 6 rests on the floating deck 7 of the main hull floating box 1. Figure 5 As shown, the sidewall of the quick-mount tooling 6 is tightly attached to the end side of the auxiliary positioning plate 13, which is located on the outside of the quick-mount tooling 6, as shown. Figure 6 As shown, it can effectively assist the tongue plate 4 on the main hull pontoon 1 in quickly inserting between the two skirt plate structure segment tongue plates 3.

[0047] S4. The hoisted skirt structure 2 is moved along the length of the ship towards the main hull pontoon 1 and tightened by the left and right lead screws 9, which can serve as temporary support and for precise positioning in conjunction with the assembly hoisting tools; a fixing block 10 is welded and installed on the pontoon deck 7 of the main hull pontoon 1, located on the extension line of the mounting position of the aforementioned quick-mounting fixture 6. One end of the left and right lead screws 9 is fixedly connected to the fixing block 10, and the other end is hung in the hook groove 61 of the aforementioned quick-mounting fixture 6. By tightening and adjusting, the positioning line 11 that can be drawn on the quick-mounting fixture 6 is aligned with the edge 8 of the pontoon deck 7. At this time, the segmented tongue plate 3 on the skirt structure 2 can be directly inserted into the tongue plate 4 on the main hull pontoon 1, thereby realizing the positioning of the skirt structure 2 along the width of the ship. Figure 3 As shown, no construction personnel are required to keep a close eye on the process, and the pin holes on the segmented tongue plate 3 coincide with the pin holes on the tongue plate 4 of the main hull pontoon 1.

[0048] S5. Subsequently, the construction workers used the auxiliary guide plate to insert the pin 5 into the corresponding pin hole 12 and fix it; the crane slowly released the hook to make the pin 5 bear the force, and after reaching a stable state, the crane released the hook, and the skirt structure 2 was installed.

[0049] Then, following the above operating steps, install the segmented skirt structure 2 one by one onto the main hull pontoon 1, as follows: Figure 8 As shown, this method enables the assembly of the entire hull structure. Actual calculations show that using this method to install the floating dock skirt structure section with pin 5, the closure time for a single skirt structure section 2 is approximately 15 minutes. Without this improved solution, using existing technology, the closure of a single skirt structure section 2 is estimated to take approximately 2 hours. Taking a 93,500-ton floating dock as an example, a single vessel has a total of 18 skirt structure sections. The closure, dismantling, and storage of all skirt structure sections can save approximately 60 hours of gantry crane operation time (600 tons); simultaneously, it saves 72 pieces / times of existing closure support tooling, reducing production preparation time by approximately 110 hours. Due to the improved assembly efficiency, the overall shipbuilding dock period can be shortened by approximately 5 days.

[0050] The above installation method has been applied in 93,500-ton and 120,000-ton floating dock projects, and can be widely applied to the installation of skirts on floating docks with pin shafts.

[0051] Of course, the above description is not intended to limit the present invention, and the present invention is not limited to the examples given above. Any changes, modifications, additions or substitutions made by those skilled in the art within the scope of the present invention should also fall within the protection scope of the present invention.

Claims

1. A method for quick positioning and installation of apron structures, characterized in that, Includes the following steps: S1. Before each skirt structure segment is joined together, at least two quick-mounting fixtures are fixed at intervals at the deck joining joint position, extending out of the skirt structure joining surface; then, according to the lateral installation position of the quick-mounting fixtures, auxiliary positioning plates are fixedly installed on the main hull floating box deck. S2. Measure the length of the pin holes on the segmented tongue plates of the skirt structure and the tongue plates of the floating box structure respectively, and then mark the corresponding positions on the quick-mounting fixture; at the same time, measure the height of the pin holes on the tongue plates, and combine the difference between the two height data to cut or raise the bottom of the protruding section of the quick-mounting fixture. S3. Hoist the skirt structure so that the free end of the tooling that can be quickly mounted on it rests on the above-mentioned floating box deck and is in close contact with the above-mentioned auxiliary positioning plate. S4. Move the hoisted skirt structure along the length of the ship toward the main hull pontoon, and tighten the quick-mounting tooling by pulling the left and right screws on the main hull pontoon deck, so that the positioning line marked on the quick-mounting tooling in step S2 above is aligned with the edge of the main hull pontoon deck. S5. Construction workers insert the pin into the corresponding pin hole and fix it; the crane slowly releases the hook to make the pin bear the force, and after reaching a stable state, the crane releases the hook, and the skirt structure installation is completed. In step S2, the vertical length L1 of the distance between the center of the pin hole on the tongue plate of the pontoon and the edge of the pontoon deck is first measured using a total station. Then, based on this length L1, the vertical position of the center of the pin hole on the tongue plate of the skirt structure is measured by the same length L1, and a positioning line is drawn at the corresponding position on the quick-mounting tool. In step S2, the vertical distance H2 between the center of the pin hole on the tongue plate of the pontoon and the upper surface of the pontoon deck is first measured using a total station. Then, the vertical distance H1 between the center of the pin hole on the segmented tongue plate of the skirt structure and the lower edge of the quick-mounting fixture is measured. Finally, the lower edge of the free end of the quick-mounting fixture is cut or raised so that H1 and H2 are equal.

2. The method for rapid positioning and installation of a skirt structure according to claim 1, characterized in that: The quick-mount fixture is a plate-shaped structure, longitudinally welded and fixed to the deck of the skirt structure, perpendicular to it; the upper edge of the free end of the quick-mount fixture is provided with a hook groove; the quick-mount fixture extends out of the lower edge of the skirt structure to perform cutting or raising operations.

3. The method for rapid positioning and installation of a skirt structure according to claim 1, characterized in that: The auxiliary positioning plate is also a plate-shaped structure, vertically welded and fixed to the floating box deck, perpendicular to it, and also perpendicular to the aforementioned quick-assembly fixture. When the two are assembled together, the auxiliary positioning plate is located on the outside of the quick-assembly fixture.

4. The method for rapid positioning and installation of a skirt structure according to claim 1, characterized in that: In step S1, the installation position of the auxiliary positioning plate is measured by using a total station to determine the lateral installation position of the quick-mounting tool.

5. The method for rapid positioning and installation of a skirt structure according to claim 2, characterized in that: A fixing block is fixed on the floating box deck, corresponding to the setting position of the quick-mounting tool. One end of the left and right lead screws is connected to the fixing block, and the other end is hooked to the hook groove of the quick-mounting tool. The skirt structure is pulled towards the floating box by adjusting the left and right lead screws.

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