Method and device for testing in-dock tightness of moon pool bottom cover

Abstract

The invention provides a moon pool bottom cover in-dock tightness test method and device, and the method comprises the following steps: S1, drawing an FRXX rib bit line on a port or a starboard of a dock bottom, the FRXX rib bit line being a center line in the width direction of a moon pool bottom cover; s2, the module vehicle is hoisted to the dock bottom, and steel plates and rubber sheets are laid in sequence; s3, the watertight tool box is hoisted to the module vehicle; s4, the height of the module vehicle is reduced to 1150-1200 mm, and the module vehicle enters along an FRXX rib position line; s5, the module vehicle generates lifting force to jack the watertight tool box, and a sealing rubber strip on the upper surface of the watertight tool box tightly presses the moon pool bottom cover to form a closed water pressure space; and S6, applying water pressure to the watertight tool box until the tightness test step is completed. The problems that the installation and debugging efficiency is low, and single-point stress is uneven are mainly solved. The moon pool bottom cover is directly transported, jacked and installed through the module vehicle, it is ensured that a tightness test is completed before the moon pool bottom cover is undocked, the moon pool bottom cover is completely installed, the precision meets the requirement, and the shipbuilding period is shortened.

Description

Technical Field

[0001] The invention belongs to the technical field of shipbuilding, and in particular relates to a method and a device for testing the tightness of a moon pool bottom cover in a dock. Background Art

[0002] The moonpool bottom cover is primarily used for opening and closing during moonpool deployment operations. Once installed, it is completely watertight and does not affect the ship's navigation performance. The moonpool bottom cover consists of a steel structure and a bottom cover frame. The steel structure of the bottom cover and the steel structure of the bottom cover frame are connected by hinges, and the bottom cover frame is welded to the hull. The moonpool bottom cover must undergo a tightness test to ensure that it is completely watertight and leak-proof underwater, ensuring the safety of the ship's navigation and scientific research. According to normal process methods, a sufficient number of adjustable jacks or rigid supports must be arranged under the watertight tooling box to generate sufficient lifting force to ensure that the moonpool bottom cover and the sealing strips on the upper surface of the watertight tooling box are pressed tightly against the moonpool bottom cover, forming a sealed hydraulic pressure space.

[0003] According to the conventional method of arranging the tightness support of the moon pool bottom cover, the following problems exist: a sufficient number of adjustable jacks or rigid supports are arranged under the watertight tooling box, and single-point force is easily caused to be uneven. The rigid support cannot be adjusted, and it is impossible to apply lifting force to tighten it when water leakage occurs. The efficiency is low when installing the jacks or rigid supports and during debugging. Summary of the Invention

[0004] An embodiment of the present invention provides a method for testing the internal tightness of a moonpool bottom cover dock, comprising the following steps:

[0005] S1: Draw the FRXX rib line on the port or starboard side of the dock bottom. The FRXX rib line is the center line of the moon pool bottom cover in the width direction.

[0006] S2: The module car is hoisted to the bottom of the dock, and steel plates and rubber sheets are laid in sequence;

[0007] S3: The watertight tooling box is hoisted onto the module vehicle;

[0008] S4: The module car is lowered to a height of 1150-1200 mm and enters along the FRXX rib line;

[0009] S5: The module vehicle generates a lifting force to lift the watertight tooling box, and the sealing strip on the upper surface of the watertight tooling box presses the bottom cover of the moon pool to form a closed water pressure space;

[0010] S6: Add water pressure to the watertight tooling box until the tightness test step is completed.

[0011] In some optional embodiments: in S1, the FRXX rib line can be selectively drawn on the port side or starboard side of the dock bottom according to the ship layout.

[0012] In some optional embodiments: in S2, the size of the steel plate is consistent with the size of the load platform of the modular vehicle, and the thickness of the steel plate is not less than 20 mm.

[0013] In some optional embodiments: in S4, during the process of the module vehicle entering the vehicle along FRXX, the gap between the watertight tooling box and the outer bottom plate and the moon pool bottom cover is monitored to prevent collision.

[0014] In some optional implementations: in said S6,

[0015] During the tightness test, the sealing condition between the watertight tooling box and the bottom cover of the moon pool is observed. If there is any water leakage, the module vehicle is controlled to apply the target lifting force upward.

[0016] In some optional embodiments: further comprising:

[0017] S7: After the tightness test is completed, the module vehicle is lowered to a height of 1150-1200 mm and then backed up.

[0018] In some optional embodiments: in S2, the modular vehicle is a vehicle group consisting of a power module unit vehicle and a modular unit vehicle.

[0019] In some optional embodiments: the module vehicle is provided with a jacking system.

[0020] The present invention also provides a moon pool bottom cover dock tightness test device, the moon pool bottom cover consists of a bottom cover steel structure body and a bottom cover outer frame, the bottom cover outer frame is welded to the hull, the bottom cover steel structure body can be opened and closed on the bottom cover outer frame, and is characterized in that it includes: a watertight tooling box, the watertight tooling box is used to hold water, and a sealing strip is provided on the upper surface of the watertight tooling box.

[0021] The beneficial effects brought about by the present invention are as follows:

[0022] As can be seen from the above scheme, the present invention provides a method and apparatus for testing the tightness of the moonpool bottom cover in a dock. This primarily addresses issues such as low installation and commissioning efficiency and uneven stress distribution at a single point. Using a self-propelled modular vehicle, the moonpool bottom cover is directly transported, lifted, and installed. This ensures that the moonpool bottom cover is properly tested before undocking, ensuring that the moonpool bottom cover is fully installed and meets required accuracy. This provides an excellent foundation for moonpool system testing during dock phases, significantly shortening the shipbuilding cycle. BRIEF DESCRIPTION OF THE DRAWINGS

[0023] Figure 1 A schematic diagram showing the structure of a moon pool bottom cover dock tightness test device and a hull tightness test position provided by the present invention;

[0024] Figure 2A schematic diagram showing the top view of the modular vehicle and the watertight tooling box provided by the present invention;

[0025] Figure 3 A schematic side view of the moon pool bottom cover and watertight tooling box provided by the present invention is shown;

[0026] Figure 4 The present invention provides Figure 3 AA cross-sectional structural diagram;

[0027] Figure 5 A schematic diagram showing the structure of the bottom cover steel structure provided by the present invention;

[0028] Figure 6 A schematic diagram showing the structure of the bottom cover outer frame provided by the present invention;

[0029] Figure 7 A schematic diagram of the moon pool bottom cover structure provided by the present invention is shown.

[0030] In the figure, 1 is the hull; 2 is the module car; 3 is the bottom cover of the moon pool; 4 is the watertight tooling box; 5 is the sealing strip; 6 is the bottom cover steel structure body; 7 is the bottom cover outer frame. DETAILED DESCRIPTION

[0031] To make the objectives, technical solutions, and advantages of the present invention more clear, the technical solutions in the embodiments of the present invention will be clearly and completely described below in conjunction with the accompanying drawings of the embodiments of the present invention. Obviously, the described embodiments are only part of the embodiments of the present invention, not all of the embodiments. Based on the embodiments of the present invention, all other embodiments obtained by ordinary technicians in this field without making creative efforts shall fall within the scope of protection of the present invention.

[0032] like Figures 1 to 7 As shown, the present invention provides a method for testing the tightness of a moon pool bottom cover in a dock, and the method comprises the following steps:

[0033] S1: Draw the FRXX rib line on the port or starboard side of the dock bottom. The FRXX rib line is the center line of the moon pool bottom cover 3 in the width direction.

[0034] S2: Module car 2 is hoisted to the bottom of the dock, and steel plates and rubber sheets are laid in sequence;

[0035] S3: The watertight tooling box 4 is hoisted onto the module vehicle 2;

[0036] S4: The height of modular car 2 is lowered to 1150-1200mm and the car is moved in along the FRXX rib line;

[0037] S5: The module vehicle 2 generates a lifting force to lift the watertight tooling box 4. The sealing strip 5 on the upper surface of the watertight tooling box 4 presses the moon pool bottom cover 3 to form a closed hydraulic space.

[0038] S6: Add water pressure to the watertight tooling box 4 until the tightness test step is completed.

[0039] Specifically, the moon pool bottom cover 3 consists of a bottom cover steel structure body 6 and a bottom cover outer frame 7 . The bottom cover outer frame 7 is welded to the hull 1 , and the bottom cover steel structure body 6 is openably and closably arranged on the bottom cover outer frame 7 .

[0040] A self-propelled modular transporter consists of a power module unit (PPU) and a modular unit vehicle. The vehicle can be modularized and combined based on the shape, weight, and volume of the cargo. The vehicle can be driven under a load-bearing bracket, lift the load using its jacking system, transport it to any designated location, and then lower it. This process does not require a crane or any other lifting equipment and can be operated by a single person. This is referred to as modular vehicle 2.

[0041] The dock piers are arranged to avoid the area corresponding to the moon pool bottom cover 3 to facilitate the subsequent tightness test of the moon pool bottom cover 3 in the dock.

[0042] S1: Draw the FRXX rib line on the port or starboard side of the dock bottom. The FRXX rib line is the center line of the moon pool bottom cover 3 in the width direction.

[0043] The FRXX rib line can be drawn on the port or starboard side of the dock bottom according to the ship layout. The FRXX rib line can be used to guide the entry of the module vehicle 2.

[0044] S2: Module vehicle 2 is hoisted to the bottom of the dock, and steel plates and rubber sheets are laid in sequence.

[0045] The size of the steel plate is consistent with the size of the load platform of the module vehicle 2, and the thickness of the steel plate is not less than 20 mm.

[0046] S3: The watertight tooling box 4 is hoisted onto the module vehicle 2.

[0047] S4: The height of module car 2 is lowered to 1150-1200mm and the car is moved in along the FRXX rib line.

[0048] During the process of module car 2 entering the vehicle along the FRXX rib position line, a dedicated person is required to monitor the gap between the watertight tooling box 4 and the outer bottom plate and the moon pool bottom cover 3 to prevent collision. When the module car 2 arrives at the predetermined position, the position is adjusted appropriately.

[0049] S5: The module vehicle 2 generates a lifting force to lift the watertight tooling box 4. The sealing strip 5 on the upper surface of the watertight tooling box 4 presses the moon pool bottom cover 3 to form a closed water pressure space.

[0050] The module vehicle 2 is provided with a jacking system. The jacking system can generate a lifting force on the watertight tooling box 4 to jack up the watertight tooling box 4.

[0051] S6: Add water pressure to the watertight tooling box 4 until the tightness test step is completed.

[0052] During the tightness test, the sealing condition between the watertight tooling box 4 and the moon pool bottom cover 3 is observed. If there is any leakage, the module vehicle 2 is controlled to apply a target lifting force upward. The target lifting force can be set by those skilled in the art according to actual needs.

[0053] Furthermore, the internal tightness test method of the pool bottom cover 3 dock this month also includes:

[0054] S7: After the tightness test is completed, the module car 2 is lowered to a height of 1150-1200 mm and then backed away.

[0055] After the tightness test is completed, the module vehicle 2 is lowered to a height of 1150-1200 mm and then retreated to complete the tightness test of the moon pool bottom cover 3 in the dock.

[0056] like Figures 1 to 7 As shown, in some optional embodiments, the present application can also use a self-propelled module transport vehicle to directly transport and lift the moon pool bottom cover 3 for installation, ensuring that the moon pool bottom cover 3 completes the tightness test before leaving the dock, greatly shortening the shipbuilding cycle and shortening the construction cycle by about 7 days.

[0057] like Figures 1 to 7 As shown, the present application also provides a moon pool bottom cover dock tightness test device, the moon pool bottom cover 3 is composed of a bottom cover steel structure body 6 and a bottom cover outer frame 7, the bottom cover outer frame 7 is welded to the hull 1, and the bottom cover steel structure body 6 is openably and closably arranged on the bottom cover outer frame 7, the moon pool bottom cover 3 dock tightness test device includes: a watertight tooling box 4, the watertight tooling box 4 is used to hold water, and a sealing strip 5 is provided on the upper surface of the watertight tooling box 4.

[0058] The sealing strip 5 on the upper surface of the watertight tooling box 4 presses the moon pool bottom cover 3 to form a closed water pressure space. The watertight tooling box 4 is pressurized with water until the tightness test is completed.

[0059] The above is a preferred embodiment of the present invention. It should be pointed out that for ordinary technicians in this technical field, several improvements and modifications can be made without departing from the principles of the present invention. These improvements and modifications should also be regarded as the scope of protection of the present invention.

Claims

1. A method for testing the internal tightness of a moon pool bottom cover dock, characterized by: The following steps are involved: S1: Draw the FRXX rib line on the port or starboard side of the dock bottom. The FRXX rib line is the center line of the moon pool bottom cover in the width direction. S2: The module car is hoisted to the bottom of the dock, and steel plates and rubber sheets are laid in sequence; S3: The watertight tooling box is hoisted onto the module vehicle; S4: The module car is lowered to a height of 1150-1200 mm and enters along the FRXX rib line; S5: The module vehicle generates a lifting force to lift the watertight tooling box, and the sealing strip on the upper surface of the watertight tooling box presses the bottom cover of the moon pool to form a closed water pressure space; S6: Add water pressure to the watertight tooling box until the tightness test step is completed.

2. The method for testing the internal tightness of a moon pool bottom cover dock according to claim 1, characterized in that: In S1, the FRXX rib position line can be selectively drawn on the port side or starboard side of the dock bottom according to the ship layout.

3. The method for testing the internal tightness of a moon pool bottom cover dock according to claim 1, characterized in that: In S2, the size of the steel plate is consistent with the size of the load platform of the modular vehicle, and the thickness of the steel plate is not less than 20 mm.

4. The method for testing the internal tightness of a moonpool bottom cover dock according to claim 1, characterized in that: In S4, when the module vehicle enters the vehicle along the FRXX rib line, the gap between the watertight tooling box and the outer bottom plate and the moon pool bottom cover is monitored to prevent collision.

5. The method for testing the internal tightness of a moon pool bottom cover dock according to claim 1, characterized in that: In S6, during the tightness test, the sealing condition between the watertight tooling box and the bottom cover of the moon pool is observed. If there is water leakage, the module vehicle is controlled to apply a target lifting force upward.

6. The method for testing the internal tightness of a moonpool bottom cover dock according to claim 1, characterized in that: Also includes: S7: After the tightness test is completed, the module vehicle is lowered to a height of 1150-1200 mm and then backed up.

7. The method for testing the internal tightness of a moonpool bottom cover dock according to claim 1, characterized in that: In S2, the modular vehicle is a vehicle group consisting of a power module unit vehicle and a modular unit vehicle.

8. The method for testing the internal tightness of a moonpool bottom cover dock according to claim 1, characterized in that: The module vehicle is provided with a jacking system.

9. A moon pool bottom cover dock tightness test device, wherein the moon pool bottom cover comprises a bottom cover steel structure body and a bottom cover outer frame, the bottom cover outer frame being welded to the hull, and the bottom cover steel structure body being openably and closably mounted on the bottom cover outer frame, characterized in that: include: A watertight tool box is used to hold water, and a sealing strip is provided on the upper surface of the watertight tool box.

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