Segmented assembled underwater sealed floating structure

Abstract

A segmented, assembled underwater sealing and levitation structure is disclosed, specifically comprising a left segment of a large pipe, an underwater equipment base, a left segment of a small pipe, an expansion joint, a right segment of a large pipe, an underwater equipment sealing ring, a right segment of a small pipe, an outer sealing ring of the small pipe, an inner sealing ring of the small pipe, an inner sealing ring of the large pipe, an outer sealing ring of the large pipe, and guide vanes. This invention enables the modular production of a high-quality underwater levitation structure with dual sealing protection under low-precision manufacturing requirements. Furthermore, it allows for weld and seal inspection to be carried out in a non-sealed environment. The structure features on-site modular assembly, reliable sealing, convenient manufacturing and transportation, and low construction difficulty. Additionally, the patented levitation structure design effectively optimizes the mechanical properties of the underwater structure, reduces the impact force of water flow on the floating structure, and reduces vortex-induced vibration effects, thereby improving the dynamic stability of the underwater structure.

Description

Technical Field

[0001] This invention belongs to the field of underwater sealing and structural design technology, specifically relating to a segmented assembly underwater sealing suspension structure. Background Technology

[0002] Under specific vessel usage requirements such as underwater inspection, cleaning, and installation, relevant underwater functional equipment needs to be positioned under specified water depth conditions. The suspended structure is the supporting foundation for the underwater functional equipment. When in use, it needs to be towed to the deployment area and sunk to the specified working depth as needed to complete the deployment. Therefore, the supporting structure of the underwater equipment should be a structural type suitable for rapid deployment. The suspended structure needs to rely on sealing technology to ensure its underwater buoyancy.

[0003] Most of the published floating structure technologies only serve as floating supports. In high-stability floating structures, the buoyancy chamber and equipment support structure are set up separately, and the buoyancy chamber only serves to provide auxiliary buoyancy. There are no application engineering cases of making the entire slender floating structure into a buoyancy chamber structure and directly using it as a support frame for underwater functional equipment. Summary of the Invention

[0004] The purpose of this invention is to provide a segmented, modular, easy-to-assemble, high-sealing-quality, and highly stable underwater sealing floating structure with low machining precision requirements.

[0005] To achieve the above objectives, the present invention is implemented through the following technical solution:

[0006] A segmented underwater sealing suspension structure mainly consists of a left section of a large pipe (1), an underwater equipment base (2), a left section of a small pipe (3), an expansion joint (4), a right section of a large pipe (5), an underwater equipment sealing ring (6), a right section of a small pipe (7), an outer sealing ring of a small pipe (8), an inner sealing ring of a small pipe (9), an inner sealing ring of a large pipe (10), an outer sealing ring of a large pipe (11), and a guide vane (12). The left section of the large pipe (1) and the right section of the large pipe (5) are both flange structures. During use, the left section of the large pipe (1) and the right section of the large pipe (5) are connected by bolts to form the main structure of the underwater detection structure. The inner sealing ring of the large pipe (10) and the outer sealing ring of the large pipe (11) are embedded in the flange of the main structure of the detection structure, serving as the main structure of the detection structure. The data cable conduit features a double sealing function. The left segment 3, right segment 7, and expansion joint 4 are all flange structures. The outer sealing ring 8 and inner sealing ring 9 of the small pipe are embedded in the flange of the data cable conduit, providing a double sealing function. The upper end of the underwater equipment base 2 on the left is welded to the upper and lower ends of the left segment 1 of the large pipe, and the lower end is welded to the left segment 3 of the small pipe. The upper end of the underwater equipment base 2 on the right is welded to the upper and lower ends of the right segment 5 of the large pipe, and the lower end is welded to the right segment 7 of the small pipe. The guide vane 12 is welded to the outside of the left segment 1 and right segment 5 of the large pipe to optimize the underwater stress and water flow dynamic characteristics of the detection structure. The underwater equipment sealing ring 10 is placed on the underwater equipment base 2 for sealing when the detector is installed on the detection structure.

[0007] The main body of the detection main structure, the left segment 1 and the right segment 5 of the main pipe, is a thin-walled circular pipe structure with external guide vanes 12. The guide vanes 12 are tangent to the upper and lower outer circular surfaces of the main pipe and form an irregular rhombus with an arc at the end with the main body of the circular pipe. The ratio of the major axis to the minor axis of the rhombus is controlled between 2.4 and 2.5.

[0008] The left segment 3 and right segment 7 of the small tube are data cable laying pipes, made of seamless steel pipes, with underwater equipment base 2 mounting holes opened on the top, responsible for laying the power supply and control lines of the detector and sealing and protecting related cables and connectors.

[0009] The underwater equipment base 2 is made of thick-walled seamless steel pipe. Its upper end face directly serves as the mounting base for the detector. The upper and lower ends are welded to the left section 1 and right section 5 of the large pipe, the left section 3 and right section 7 of the small pipe, respectively. The top is provided with a threaded hole for the detector to be fixed underwater. The inside of the steel pipe serves as a channel for instrument installation and cable laying.

[0010] The large pipe left segment 1 flange and the large pipe right segment 5 flange are testing main structure connection devices. Two O-ring grooves are set on the flange mating surface to ensure the internal watertightness after the main structure is spliced. The small pipe left segment 3 flange and the small pipe right segment 7 flange are data cable conduit connection devices. Two O-ring grooves are set on the flange mating surface to ensure the internal watertightness after the data cable conduit is spliced.

[0011] The expansion joint 4 is made of thickened stainless steel corrugated pipe, and the flanges on both sides are used in combination with the data cable pipe flanges to eliminate the problem that the two sets of flanges cannot fit tightly at the same time due to processing errors in the main structure and data cable pipe structure. This reduces the processing accuracy requirements of the main structure and data pipe and ensures that the main structure and data cable pipe are watertight at the same time.

[0012] The inner sealing ring 10 and outer sealing ring 11 of the large tube are sealing devices for the large tube. The inner sealing ring 10 is 2-3 mm larger than the outer sealing ring 11 of the large tube, ensuring the internal sealing of the main structure during long-term underwater operation. The outer sealing ring 8 and inner sealing ring 9 of the small tube are sealing devices for the small tube. The inner sealing ring 9 is 1-2 mm larger than the outer sealing ring 8 of the small tube, ensuring the sealing of the data cable conduit during long-term underwater operation.

[0013] The underwater equipment sealing ring 6 uses a single O-ring to ensure that the contact surface between the detector and the detection structure is sealed underwater after the detector is installed. Attached Figure Description

[0014] Figure 1 This is a diagram of the segmented assembly underwater sealing floating structure of the present invention.

[0015] Figure 2 yes Figure 1 AA sectional view.

[0016] Figure 3 yes Figure 1 A magnified view of part of M1.

[0017] Figure 4 yes Figure 1 A magnified view of a portion of M2.

[0018] In the diagram: 1. Left section of the main pipe; 2. Underwater equipment base; 3. Left section of the small pipe; 4. Expansion joint; 5. Right section of the main pipe; 6. Underwater equipment sealing ring; 7. Right section of the small pipe; 8. External sealing ring of the small pipe; 9. Internal sealing ring of the small pipe; 10. Internal sealing ring of the main pipe; 11. External sealing ring of the main pipe; 12. Guide vane. Detailed Implementation

[0019] See Figures 1 to 4 The working principle and manufacturing process of this invention are as follows:

[0020] The guide vane 12 is welded to the outside of the left section 1 and the right section 5 of the main pipe. When in operation, it can reduce the impact of water flow on the structure and reduce the dynamic eddy effect.

[0021] The lower end of the underwater equipment base 2 is welded to the upper part of the left section 3 and the right section 7 of the small pipe, respectively. After the overall machining is completed, the left section 3, the right section 7, the expansion joint 4, the outer sealing ring 8 and the inner sealing ring 9 of the small pipe are connected. The sealing performance of the flanges of the above components is inspected. After the sealing performance is qualified, the connection of the left section 3, the right section 7 and the expansion joint 4 is removed.

[0022] The underwater equipment base 2 and the left section of the small pipe 3 are welded together and welded to the left section of the large pipe 1 through the weld seam of the underwater equipment base 2. The underwater equipment base 2 and the right section of the small pipe 7 are welded together and welded to the right section of the large pipe 5 through the weld seam of the underwater equipment base 2.

[0023] Connect the left section 1, right section 5, inner sealing ring 10, and outer sealing ring 11 of the main pipe with bolts to complete the main structure splicing.

[0024] Connect the left section 3, right section 7, expansion joint 4, inner sealing ring 9, and outer sealing ring 8 of the small tube with bolts to complete the data cable conduit splicing.

[0025] Check the sealing of each connecting flange. If there is no leakage, the entire test structure is complete.

[0026] The corresponding detector and underwater equipment sealing ring 6 are fixed to the detection structure with bolts, thus completing the installation of the detector on the detection structure.

Claims

1. A segmented, assembled underwater sealing and suspending structure, mainly composed of a left segment of a large pipe (1), an underwater equipment base (2), a left segment of a small pipe (3), an expansion joint (4), a right segment of a large pipe (5), an underwater equipment sealing ring (6), a right segment of a small pipe (7), an outer sealing ring of a small pipe (8), an inner sealing ring of a small pipe (9), an inner sealing ring of a large pipe (10), an outer sealing ring of a large pipe (11), and a guide vane (12), characterized in that: The left section (1) and right section (5) of the main pipe are both circular pipe flange structures. The left section (1) and right section (5) of the main pipe are connected by bolts to form the main underwater structure. The inner sealing ring (10) and outer sealing ring (11) of the main pipe are embedded in the flange of the main underwater structure to play a double sealing role. The left section (3), right section (7), and expansion joint (4) of the small pipe are all circular pipe flange structures to form the data cable conduit. The outer sealing ring (8) and inner sealing ring (9) of the small pipe are embedded in the flange of the data cable conduit to play a double sealing role. For the data cable conduit, the upper end of the left underwater equipment base (2) is welded to the upper and lower ends of the left section (1) of the large pipe and the left section (3) of the small pipe. The upper end of the right underwater equipment base (2) is welded to the upper and lower ends of the right section (5) of the large pipe and the right section (7) of the small pipe. The guide vane (12) is welded to the left section (1) of the large pipe and the right section (5) of the large pipe to optimize the underwater structure's underwater stress and water flow dynamic characteristics. The underwater equipment sealing ring (10) is placed on the underwater equipment base (2) for sealing the underwater equipment on the underwater structure.

2. The segmented assembly underwater sealed suspension structure according to claim 1, characterized in that... The main structure of the left section (1) and right section (5) of the main pipe is a thin-walled circular pipe structure with external guide vanes (12). The guide vanes (12) are tangent to the upper and lower outer circular surfaces of the main pipe and form an irregular rhombus with a circular arc at the end with the main body of the circular pipe. The ratio of the major axis to the minor axis of the rhombus is controlled between 2.4 and 2.5 to reduce the impact of water flow on the structure and the dynamic vortex effect.

3. The segmented assembly underwater sealed suspension structure according to claim 1, characterized in that... The data cable conduit is installed inside the main underwater structure. After the main underwater structure and the data cable conduit are assembled, they become two independent sealed compartments. Water leakage from the main underwater structure alone will not damage the underwater equipment and data cable installed inside the data cable conduit, which have high watertightness requirements. Water leakage from the contact surface between the underwater equipment and the underwater equipment base (2) will only enter the data cable conduit and will not enter the inner compartment of the main underwater structure, thus not affecting the overall buoyancy of the underwater structure.

4. The segmented assembly underwater sealed suspension structure according to claim 1, characterized in that... The underwater equipment base (2), the left section of the small pipe (3), and the right section of the small pipe (7) are all made directly from seamless thick-walled steel pipes. The underwater equipment base (2) is independently welded to the main underwater structure and to the data cable pipe at the bottom.

5. A segmented, assembled underwater sealed suspension structure according to claim 1, characterized in that... The data cable conduit connection is transitioned through the expansion joint (4) to avoid the problem that the left section (1), right section (5), left section (3), and right section (7) of the large tube cannot be tightly fitted at the same time due to processing errors.

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