Pipe supporting tool for enhancing loading capacity of double-layer bottom of ship

Abstract

A ship body is provided with the double-layer bottom composed of an inner bottom plate and an outer bottom plate, inner bottom longitudinal ribs are arranged between the inner bottom plate and the outer bottom plate and on the inner bottom plate, outer bottom longitudinal ribs are arranged on the outer bottom plate, the pipe supporting tool is arranged between the inner bottom plate and the outer bottom plate, the pipe supporting tool is provided with a long-strip-shaped round pipe body, and the long-strip-shaped round pipe body is provided with a long-strip-shaped round pipe body. Square sealing plates are arranged at the two ends of the round pipe, and clamps are fixed outside the sealing plates. The clamp is vertically arranged between the inner bottom plate and the outer bottom plate, the inner bottom longitudinal bone and the outer bottom longitudinal bone are located at the two ends of the clamp respectively, inserted into a clamping groove formed by the two limiting plates and fixed through bolts in an abutting mode, and the multiple pipe supporting tools are arranged between the inner bottom plate and the outer bottom plate at equal intervals. The device is used for conducting temporary structural reinforcement on the area, where stress exceeds the standard, of the double-layer bottom structure in the ship launching process of slipway construction, the pressure bearing capacity of the double-layer bottom structure is enhanced, the bearing capacity of the ship bottom structure in the slipway area is effectively improved, and safe launching of the ship for slipway construction is achieved.

Description

Technical Field

[0001] This invention belongs to the field of marine vessel design and construction, and specifically relates to a pipe-supporting tool for enhancing the pressure-bearing capacity of a ship's double bottom. Background Technology

[0002] For ships built on a longitudinally inclined slipway, after the hull is completed, it needs to slide from the slipway into the water below for subsequent work. Before launching, all the construction piers supporting the hull are removed, and the entire weight of the ship is supported solely by two slipways (e.g., Figure 1 As shown in the diagram, the small contact area between the hull and the slipway, coupled with the concentrated forces on the slipway during the launching process, results in significant stress on parts of the hull structure. The hull structure above the slipway bears the enormous load generated by the combined weight of the entire ship and the concentrated forces during launching. Because the hull structure design only considers the requirements for normal operational use and does not account for the stress during launching after construction on the slipway, the stress state during launching is completely different from that during operation. The hull structure above the slipway is a longitudinally framed double-bottom structure. The outer plate supported by the slipway and the outer bottom plate frame formed by the longitudinal ribs have weak bearing capacity and cannot effectively withstand the load transmitted by the slipway. Therefore, its structure cannot meet the stress requirements during launching after construction on the slipway. Insufficient hull structure strength during launching of ships built on the slipway will lead to structural damage and seriously affect launching safety. Summary of the Invention

[0003] To address the aforementioned problems, this invention provides a pipe-supporting fixture for enhancing the pressure-bearing capacity of a ship's double bottom. The technical solution adopted is as follows:

[0004] A pipe-supporting fixture for enhancing the pressure-bearing capacity of a ship's double bottom. The ship has a double bottom consisting of an inner bottom plate and an outer bottom plate. Between the inner bottom plate and the outer bottom plate, an inner bottom longitudinal rib is provided on the inner bottom plate and an outer bottom longitudinal rib is provided on the outer bottom plate. A pipe-supporting fixture is provided between the inner bottom plate and the outer bottom plate. The pipe-supporting fixture has a long strip-shaped circular tube body, and square sealing plates are provided at both ends of the circular tube. Clamps are fixed to the outside of the sealing plates.

[0005] The clamp consists of two limiting plates and bolts. The two limiting plates are symmetrically fixed on the surface of the sealing plate and perpendicular to the sealing plate. There is a gap between the two limiting plates. One of the limiting plates has two bolt holes. The bolts pass through the bolt holes and press against the inner surface of the other limiting plate.

[0006] The clamp is vertically set between the inner bottom plate and the outer bottom plate. The inner bottom longitudinal rib and the outer bottom longitudinal rib are located at both ends of the clamp and are inserted into the slots formed by the two limiting plates. They are then tightened and fixed with bolts. Multiple support tube fixtures are set at equal intervals between the inner bottom plate and the outer bottom plate.

[0007] Furthermore, the aforementioned pipe-supporting fixture for enhancing the pressure-bearing capacity of a ship's double bottom has an overall height that is 20mm smaller than the distance between the inner and outer bottom longitudinal ribs.

[0008] Furthermore, in the aforementioned pipe-supporting fixture for enhancing the pressure-bearing capacity of a ship's double bottom, after the inner and outer bottom longitudinal ribs are inserted into the slots, the gaps between the inner and outer bottom longitudinal ribs and the slots are filled with rubber pads.

[0009] Furthermore, the aforementioned pipe-supporting fixture for enhancing the pressure-bearing capacity of a ship's double bottom further includes a positive limiting plate with a width equal to the diameter of the main body of the circular pipe.

[0010] Furthermore, the aforementioned pipe-supporting fixture for enhancing the pressure-bearing capacity of a ship's double bottom is further designed such that the centerline of the main body of the circular pipe is on the same vertical line as the inner bottom longitudinal rib and the outer bottom longitudinal rib.

[0011] This invention relates to the temporary structural reinforcement of areas in the double-bottom structure that exceed stress limits during the launching process of ships built on a slipway. The application location of the reinforcement scheme is determined based on the stress analysis of the hull structure during launching strength calculations, identifying the bottom areas requiring reinforcement. Before launching, the support pipe fixtures are arranged in a predetermined manner at the locations requiring structural reinforcement. Using the longitudinal ribs of the inner and outer bottom structural surfaces of the ballast tanks, the support pipe fixtures are secured to the longitudinal ribs using clamps and bolts at both ends, thereby strengthening the load-bearing capacity of the double-bottom structure. Applying this temporary structural reinforcement scheme effectively improves the load-bearing capacity of the ship's bottom structure in the slipway area. The load-bearing capacity of the double-bottom structure after the temporary reinforcement scheme is increased to four times its original state, thus avoiding structural damage due to insufficient structural strength during launching and ensuring safe launching of ships built on the slipway. Attached Figure Description

[0012] Figure 1 This is a cross-sectional view of the ship's structure on the slipway.

[0013] Figure 2 yes Figure 1 A magnified view of a section of the middle slide;

[0014] Figure 3 This is a schematic diagram of the support pipe fixture located between the inner bottom plate and the outer bottom plate;

[0015] Figure 4 This is a schematic diagram of the structure of the support tube tool clamping the inner and outer longitudinal bones of the bottom;

[0016] Among them, 1-round tube body, 2-sealing plate, 3-limiting plate, 4-bolt, 5-inner bottom longitudinal bone, 6-outer bottom longitudinal bone. Detailed Implementation

[0017] The invention will be further described with reference to the accompanying drawings.

[0018] A pipe-supporting fixture for enhancing the pressure-bearing capacity of a ship's double bottom. The ship has a double bottom consisting of an inner bottom plate and an outer bottom plate. Between the inner bottom plate and the outer bottom plate, an inner bottom longitudinal rib is provided on the inner bottom plate and an outer bottom longitudinal rib is provided on the outer bottom plate. A pipe-supporting fixture is provided between the inner bottom plate and the outer bottom plate. The pipe-supporting fixture has a long strip-shaped circular tube body, and square sealing plates are provided at both ends of the circular tube. Clamps are fixed to the outside of the sealing plates.

[0019] The clamp consists of two limiting plates and bolts. The two limiting plates are symmetrically fixed on the surface of the sealing plate and perpendicular to the sealing plate. There is a gap between the two limiting plates. One of the limiting plates has two bolt holes. The bolts pass through the bolt holes and press against the inner surface of the other limiting plate.

[0020] The clamps are vertically positioned between the inner and outer base plates. The inner and outer longitudinal ribs are located at both ends of the clamps, inserted into the slots formed by two limiting plates, and secured with bolts. Multiple support tube fixtures are evenly spaced between the inner and outer base plates. The length of the support tube fixtures, which support the inner and outer longitudinal ribs, is designed according to the spacing between the ribs. The main pressure-bearing component of the support tube fixture is a circular tube. End plates are welded to both ends of the circular tube, forming slots with the limiting plates to accommodate part of the longitudinal ribs. The clamps at both ends of the support tube fixture consist of two limiting plates and bolts. The size of the limiting plates is approximately the same as the diameter of the support tube. One of the limiting plates has two bolt holes, which can be adjusted according to the dimensions of the inner and outer longitudinal ribs. The length of the support tube fixture from the upper to the lower end plate is 20mm less than the net height between the inner and outer longitudinal ribs, facilitating proper placement of the support tube fixture. During installation of the support pipe fixture, insert one side of the panel of the inner and outer bottom longitudinal ribs into the slots at both ends of the support pipe fixture. Use rubber pads to fill the gaps between the upper and lower end sealing plates and the longitudinal ribs, ensuring tight contact between the two ends of the support pipe and the inner and outer bottom longitudinal ribs. Tighten the fastening bolts at both ends of the support pipe fixture to secure the longitudinal ribs. After the bolts are tightened, the support pipe should be perpendicular to the inner and outer bottom longitudinal ribs, and the centerline of the support pipe should be in the same plane as the upper and lower end longitudinal ribs to achieve effective load transfer. The support pipe fixture is installed on the longitudinal rib inside the double-layer bottom above the slide. It is arranged longitudinally at equal intervals between the two ribs in the bottom area that needs reinforcement. If the structural stress is still high after the water strength calculation, two equal intervals can be arranged between the two ribs.

[0021] This invention relates to the temporary structural reinforcement of areas in the double-bottom structure that exceed stress limits during the launching process of ships built on a slipway. The application location of the reinforcement scheme is determined based on the stress analysis of the hull structure during launching strength calculations, identifying the bottom areas requiring reinforcement. Before launching, the support pipe fixtures are arranged in a predetermined manner at the locations requiring structural reinforcement. Using the longitudinal ribs of the inner and outer bottom structural surfaces of the ballast tanks, the support pipe fixtures are secured to the longitudinal ribs using clamps and bolts at both ends, thereby strengthening the load-bearing capacity of the double-bottom structure. Applying this temporary structural reinforcement scheme effectively improves the load-bearing capacity of the ship's bottom structure in the slipway area. The load-bearing capacity of the double-bottom structure after the temporary reinforcement scheme is increased to four times its original state, thus avoiding structural damage due to insufficient structural strength during launching and ensuring safe launching of ships built on the slipway.

[0022] After the ship is launched, the fastening bolts at both ends of the support pipe fixture are removed and the fixture is recycled. Compared with the welding-type temporary reinforcement solution, the bolt-fastening installation and disassembly method avoids damage to the structure and paint caused by welding and cutting inside the ballast tank, and reduces the amount of subsequent grinding and repair work.

Claims

1. A pipe-supporting tooling for enhancing the pressure-bearing capacity of a ship's double bottom, characterized in that, The hull has a double bottom consisting of an inner bottom plate and an outer bottom plate. Between the inner bottom plate and the outer bottom plate, an inner bottom longitudinal rib is provided on the inner bottom plate and an outer bottom longitudinal rib is provided on the outer bottom plate. A tube support fixture is provided between the inner bottom plate and the outer bottom plate. The tube support fixture has a long strip-shaped round tube body. Square sealing plates are provided at both ends of the round tube. Clamps are fixed to the outside of the sealing plates. The clamp consists of two limiting plates and bolts. The two limiting plates are symmetrically fixed on the surface of the sealing plate and perpendicular to the sealing plate. There is a gap between the two limiting plates. One of the limiting plates has two bolt holes. The bolts pass through the bolt holes and press against the inner surface of the other limiting plate. The clamp is vertically set between the inner bottom plate and the outer bottom plate. The inner bottom longitudinal rib and the outer bottom longitudinal rib are located at both ends of the clamp and are inserted into the slots formed by the two limiting plates. They are then tightened and fixed with bolts. Multiple support tube fixtures are set at equal intervals between the inner bottom plate and the outer bottom plate.

2. The pipe-supporting fixture for enhancing the pressure-bearing capacity of a ship's double bottom according to claim 1, characterized in that, The overall height of the clamp is 20mm smaller than the distance between the inner and outer longitudinal bones.

3. The pipe-supporting fixture for enhancing the pressure-bearing capacity of a ship's double bottom according to claim 1, characterized in that, After the inner and outer longitudinal bones are inserted into the slots, the gaps between the inner and outer longitudinal bones and the slots are filled with rubber pads.

4. The pipe-supporting fixture for enhancing the pressure-bearing capacity of a ship's double bottom according to claim 1, characterized in that, The limiting plate is a positive limiting plate, and the width of the limiting plate is the same as the diameter of the main body of the circular tube.

5. The pipe-supporting fixture for enhancing the pressure-bearing capacity of a ship's double bottom according to claim 1, characterized in that, The centerline of the main body of the round tube is on the same vertical line as the inner bottom longitudinal rib and the outer bottom longitudinal rib.

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