A waterproof sealing structure for the gap between a single-point buoy and a hull and a construction method thereof

Abstract

The present invention provides a waterproof sealing structure for the gap between a single-point buoy and a hull and a construction method thereof, which belongs to the field of ship technology, and includes a sealing structure body, which is circumferentially arranged around the central axis of the single-point buoy, and includes a bottom support, a glue layer, a breathing tube, a pressure strip and a strut, a pressure strip is provided on the top of the glue layer, and a strut is provided above the pressure strip; a plurality of bottom supports are provided at the bottom of the glue layer, and the breathing tube includes a connected main pipe, a low-point water level drainage pipe and a high-point water level connecting pipe. The present invention designs a set of sealing structures by utilizing the structural characteristics of the gap between a single-point buoy and a hull, and designs a construction method for the sealing structure. The design target of the sealing structure is determined according to the pressure difference between the internal and external seawater of the FPSO; and it is verified whether the design reaches the sealing pressure bearing target. It can be seen that the present invention prevents seawater from flowing into the cabin through the gap between the single-point buoy and the hull, realizes effective sealing, and ensures the safety of the hull.

Description

Technical Field

[0001] The invention belongs to the technical field of ships, and in particular relates to a waterproof sealing structure for a gap between a single-point buoy and a hull and a construction method thereof. Background Art

[0002] As a key equipment for offshore oil development, floating production storage and offloading (FPSO) is widely used in offshore oil development, production, storage and transportation around the world. Among them, the single-point mooring system, as an important part of FPSO, undertakes multiple functions such as FPSO positioning and oil and gas medium transportation. In many sea areas, the internal turret buoy single-point mooring system has been widely used due to its unique advantages.

[0003] like Figure 1 As shown, when the inner turret buoy type single-point mooring system is working, the locking device 2 fixed on the hull 1 clamps the upper end of the single-point buoy 3 by the lever principle, and the single-point buoy 3 is clamped by the locking device 2 and lifted upward, so that the single-point buoy 3 as a whole tends to be closely attached to the hull 1. The single-point buoy 3 is a cone as a whole, and a depression is designed at the upper end to facilitate the insertion of the lever 4 of the locking device 2. A structural reinforcement steel ring belt is designed at the waist of the cone, and an anchor chain 5 is provided at the lower end of the single-point buoy 3, which extends all the way to the seabed and is connected to the anchor. In the contact area between the hull 1 and the single-point buoy 3, there are only the reinforcement steel ring belt of the hull structure and the limit block 6 arranged along the circumference of the central axis of the buoy. Except for this area, there is a gap between the hull 1 and the single-point buoy 3. The purpose of designing this gap is to consider that it is impossible to accurately fit the installation of marine engineering. Therefore, the cone space size of the hull 1 is larger than the cone of the single-point buoy 3 to cover the installation error.

[0004] When the single-point buoy 3 is connected to the hull 1, the buoy reinforcement steel ring belt 7 and the hull reinforcement steel ring belt 8 are installed tightly. Although the two are in close contact due to the locking force of the locking device 2, the watertight design is not adopted there. It is a metal-to-metal structural contact. Therefore, as the draft of the hull 1 changes, the natural pressure of the seawater will press the water in. The seawater flows in from the gap between the bottom of the hull 1 and the single-point buoy 3, flows through and penetrates the reinforced steel ring belt, and has an upward pressure.

[0005] At the edge of the cabin structure, a ring-shaped sealing airbag 9 is currently designed. Watertightness is achieved by inflating the sealing airbag 9 to block the gap between the single-point buoy 3 and the hull 1. Under normal working conditions, seawater will be blocked by the sealing airbag 9 and will not reach the gap outlet between the hull 1 and the single-point buoy 3. However, in actual use, there are often two situations that make the above-mentioned sealing airbag 9 fail. One is a short-term instantaneous destructive failure, such as a foreign object stuck in the airbag during the installation of the single-point buoy 3; the other is failure after long-term use, such as the airbag leaking over a long period of time or the steel structure of the hull around the airbag corroding, the gap becomes larger, and the elasticity of the airbag weakens and hardens, and it is impossible to fill the uneven corrosion surface for sealing, which eventually causes seawater to enter the cabin through the sealing airbag 9. The bigger problem is that the sealing airbag 9 is not considered for online replacement when it is designed. The sealing airbag 9 is hidden between the hull 1 and the single-point buoy 3, and cannot be touched by personnel in the cabin. Unless the locking device 2 is released to separate the single-point buoy 3 and the hull 1, there is space to replace the sealing airbag 9. However, this action means repeating the process of connecting the floating device and the buoy at sea, which is impossible to implement in the 10 to 15 years of normal operation of the floating device. This means that if the sealing airbag 9 fails, it cannot be replaced or repaired online, and seawater can only be allowed to flow into the cabin. If the amount of water is small, long-term immersion will accelerate the corrosion of the structure in the originally dry cabin. If the amount of water is large, water will accumulate in the cabin, which will affect the floating stability balance of the ship. Summary of the invention

[0006] The problem to be solved by the present invention is to provide a waterproof sealing structure for the gap between a single-point buoy and a hull and a construction method thereof.

[0007] In order to solve the above technical problems, the technical solution adopted by the present invention is: a waterproof sealing structure for the gap between a single-point buoy and a hull, comprising a sealing structure body, which is circumferentially arranged around the central axis of the single-point buoy, the sealing structure body comprising a bottom support, a glue layer, a breathing tube, a pressure strip and a strut, a pressure strip is provided on the top of the glue layer, and a strut is provided above the pressure strip; a plurality of bottom supports are provided at the bottom of the glue layer, the bottom support comprises a bottom support surface and a bottom support leg arranged at the bottom of the bottom support surface, the breathing tube comprises a connected main pipe, a low-point water level drainage pipe and a high-point water level connecting pipe, the lower end of the main pipe is arranged through the pressure strip, the glue layer and the bottom support surface, the upper end of the main pipe is respectively connected with the low-point water level drainage pipe and the high-point water level connecting pipe, the output end of the low-point water level drainage pipe is led to the hull deck, and the open mouth of the high-point water level connecting pipe is located higher than the sea level.

[0008] Furthermore, the cross-section of the glue-filling layer and the layer strip are both inverted trapezoidal; the layer strip and the bottom support are both made of stainless steel metal; the height of the bottom support leg is higher than the limit block to ensure that the glue-filling ring surface is intact and not blocked by the limit block.

[0009] Furthermore, the support rod is a screw rod with threaded threads, and a nut is provided at the lower part of the support rod. The nut is used to increase the contact area with the pressure strip. The upper part of the support rod is screwed into the thread of the tooling clip. By rotating the support rod, the upper and lower positions of the support rod are controlled to be adjusted to contact with the pressure strip, and a few more turns are appropriately performed to generate greater pressure.

[0010] Furthermore, the tooling clip is made of metal, the upper end of the tooling clip is clamped to the upper edge of the single-point float through a top screw, and the lower end is clamped to the groove of the single-point float through a top screw. At the same time, the lower end of the tooling clip is also connected to the upper part of the support rod.

[0011] Furthermore, the main pipe and the low-water-level drainage pipe are stainless steel pipes, and the high-water-level connecting pipe is a plastic transparent pipe.

[0012] Furthermore, the breathing tubes are provided in two groups, which are respectively located at the bow and stern of the hull.

[0013] Furthermore, the pressure resistance P of the sealing structure body when achieving the sealing effect is:

[0014]

[0015] in, is the density of seawater; g is the acceleration of gravity; h1 is the vertical distance from the seawater plane to the bottom of the ship. Since h1 is a dynamic value, the maximum draft of the hull is taken; h2 is the vertical distance from the sealing surface of the sealing structure body to the bottom of the ship, that is, the vertical distance from the pressure strip or the surface of the deck in the cabin to the bottom of the ship; is the safety factor.

[0016] The present invention also provides a construction method for a waterproof sealing structure between a single-point buoy and a hull, comprising the following steps:

[0017] S1. Test-fit the base and the pressure strip. If they are not suitable, they need to be polished or replaced until it is confirmed that the bases of each section can be assembled into a complete ring surface;

[0018] S2. Adjust the hull draft to below the batten plane or the deck inside the cabin, so that the natural pressure of seawater cannot reach the space occupied by the glue layer. Grind and degrease the surface of the V-shaped opening to increase the adhesion of the glue layer after glue filling.

[0019] S3. Install the bottom bracket, apply a small amount of sealant on the joints of each section of the bottom bracket to form a complete ring surface; the main pipes of the breathing tube are welded on the bottom brackets in the bow and stern directions of the hull;

[0020] S4. Wait for the small amount of sealant to dry, and after confirming that the sealant will not leak into the space below the bottom support surface, start formal construction and pour a large amount of glue. The glue pouring is formed in one step until the thickness of the glue pouring layer meets the requirements to form a glue pouring layer.

[0021] S5. Wait for the glue layer to dry. After drying, install the pressure strips, add tooling clips, tighten the support rods until the lower end of the support rods contacts the pressure strips, and apply appropriate pre-pressure; there are pre-punched holes on the pressure strips in the bow and stern directions of the hull. During installation, the holes pass through the main pipe of the breathing tube. There is no need to weld or bond the holes and the main pipe.

[0022] S6. Install the remaining breathing pipes, including the low-water-level drainage pipe and the high-water-level connecting pipe, to restore the normal draft of the hull.

[0023] Due to the adoption of the above technical solution, the present invention has the following beneficial effects:

[0024] The present invention utilizes the structural characteristics of the gap between the single-point buoy and the hull to design a set of sealing structures, and designs a construction method for the sealing structure. The design goal of the sealing structure is determined according to the pressure difference between the internal and external seawater of the FPSO; and in order to verify whether the design achieves the sealing pressure-bearing target, a sealing structure effect model verification is carried out. It can be seen that the present invention prevents seawater from flowing into the cabin through the gap between the single-point buoy and the hull, achieves effective sealing, and ensures the safety of the hull.

[0025] The base designed by the present invention frames the core sealing space, realizes the goal of finding a coherent and complete annular surface on the existing structure, and realizes effective sealing and waterproofing.

[0026] The breathing tube designed by the present invention can effectively discharge the air in the gap, reduce the risk of failure caused by air pressure penetrating the glue layer, and the breathing tube is provided with low-level drainage and high-level observation functions, which is convenient for maintenance and inspection and water level observation; and the breathing tube passes through the sealing structure of the glue layer and enters downward into the gap space in contact with the seawater, and is welded to the bottom support to ensure stability. Considering that the hull always tends to be high at the bow and low at the stern, plus the changes in the hull sway, two groups of breathing tubes are set, corresponding to the bow and stern directions respectively, so as to more thoroughly discharge the air in the gap space. BRIEF DESCRIPTION OF THE DRAWINGS

[0027] The present invention will be described in detail below with reference to the accompanying drawings and in combination with examples, and the advantages and implementation methods of the present invention will become more obvious. The contents shown in the accompanying drawings are only used to explain the present invention and do not constitute any limitation to the present invention in any sense. In the accompanying drawings:

[0028] Figure 1 The figure is a schematic diagram of the connection relationship between a single-point buoy and a hull in the prior art.

[0029] Figure 2 It is a structural schematic diagram of the sealing structure of the present invention.

[0030] Figure 3 It is a top view of the sealing structure of the present invention.

[0031] Figure 4 It is a schematic diagram of a local arc segment of the sealing structure of the present invention.

[0032] Figure 5 It is a schematic diagram of the sealing structure effect model of the present invention.

[0033] In the figure:

[0034] 1. Hull; 2. Locking device; 3. Single-point buoy; 4. Lever; 5. Anchor chain; 6. Limit block; 7. Buoy reinforcement steel ring belt; 8. Hull reinforcement steel ring belt; 9. Sealing airbag; 10. Bottom support; 11. Glue layer; 12. Breathing tube; 13. Pressure strip; 14. Strut; 15. Bottom support surface; 16. Bottom support leg; 17. Tooling clip; 18. Top screw; 19. Low water level drain pipe; 20. High water level connecting pipe; 21. Main pipe; 22. Pressure gauge; 23. Valve; 24. Water pump; 25. Water storage box. DETAILED DESCRIPTION

[0035] like Figures 2 to 5 As shown, the present invention provides a waterproof sealing structure for the gap between a single-point buoy and a hull, including a sealing structure body, which is circumferentially arranged around the central axis of the single-point buoy 3, and the sealing structure body includes a base 10, a glue-filled layer 11, a breathing tube 12, a pressure strip 13 and a support rod 14 arranged from bottom to top.

[0036] The glue layer 11 is centered and has an inverted trapezoidal cross section. A complete sealing annular surface is formed by glue pouring, thereby blocking the V-shaped opening (seawater inlet) between the hull 1 and the single-point buoy 3 to achieve a sealing effect.

[0037] A layer 13 is provided on the top of the glue layer 11. The layer 13 is made of stainless steel and has an inverted trapezoidal cross-section. The two side lines of the trapezoid are respectively matched with the V-shaped openings formed by one side of the hull 1 and one side of the single-point buoy 3. The layer 13 is annular as a whole. Due to the installation error when the single-point buoy 3 and the hull 1 are installed, that is, the central axis of the single-point buoy 3 does not coincide with the central axis of the hull 1, the width of the V-shaped opening is not equal. In order to keep the layer 13 horizontal and better fit the glue layer 11, the width of the layer ring is not equal. Some positions are wide and some positions are narrow. The purpose is to form a unified horizontal plane to better fit the glue layer 11.

[0038] A plurality of bottom brackets 10 are arranged at the bottom of the glue filling layer 11. The bottom brackets 10 include a bottom bracket surface 15 and a bottom bracket leg 16 arranged at the bottom of the bottom bracket surface 15. Each bottom bracket 10 is made of stainless steel metal material around the single-point buoy 3. The function of the bottom bracket surface 15 is to establish a horizontal plane on the space of the V-shaped opening, and glue is poured on its surface. When pouring glue, the liquid will not leak into the lower space, which can avoid the sealant from reacting with the original sealing airbag 9, and can also save the amount of sealant and reduce unnecessary consumption; the function of the bottom bracket leg 16 is to allow the bottom bracket 10 to "stand" on the gap space between the single-point buoy 3 and the hull 1 to form a supporting force, and at the same time, provide a supporting reaction force for the strut 14 during use. The height of the bottom bracket leg 16 is higher than the limit block 6 in the original design. If the height of the limit block 6 exceeds the bottom bracket leg 16 or even exceeds the V-shaped opening space, it is necessary to replace the short limit block and reduce its height to below the bottom bracket leg 16 to ensure that the glue filling ring surface is intact and not blocked by the limit block 6.

[0039] A support rod 14 is arranged above the pressure strip 13. The support rod 14 is a screw with threaded threads. A nut is arranged at the lower part of the support rod 14. The nut is used to increase the contact area with the pressure strip 13. The upper part of the support rod 14 is screwed into the thread of the tooling clip 17. By rotating the support rod 14, its up and down position is controlled to be adjusted to contact with the pressure strip 13, and a few more turns are appropriately made to generate greater pressure.

[0040] The tooling clip 17 is a structure made of metal, the upper end of the tooling clip 17 is clamped to the upper edge of the single-point buoy 3 through a top screw 18, and the lower end of the tooling clip 17 is clamped in the groove of the single-point buoy 3 through a top screw 18. At the same time, the lower end of the tooling clip 17 is also connected to the upper part of the support rod 14. It can be seen that the structural characteristics of the single-point buoy 3 are utilized, and the upper and lower top screws 18 are fixed to the end of the single-point buoy 3 to provide a foundation for the support rod 14.

[0041] The breathing tube 12 includes a main pipe 21, a low-water-level drainage pipe 19 and a high-water-level connecting pipe 20. The main pipe 21 and the low-water-level drainage pipe 19 are stainless steel pipes, and the high-water-level connecting pipe 20 is a plastic transparent pipe. The breathing tube 12 is used to discharge the gas in the gap between the single-point buoy 3 and the hull 1. Since gas is easier to penetrate and destroy the glue layer 11 than liquid, a structure for discharging breathing is required to reduce the burden on the sealing glue layer 11. The breathing tube 12 passes through the layer 13, the glue layer 11, and the bottom support surface 15, and penetrates into the gap space where the seawater and the air are located. The breathing tube 12 is led out to the deck on one side of the hull 1, and a tee is set to form two branch pipes for introducing seawater and air. Among them, the low-point water level drainage pipe 19 is responsible for discharging a large amount of seawater or seawater impurities accumulated after long-term use to the deck and then discharging them. The high-point water level connecting pipe 20 has an opening position higher than the seawater level, which can discharge air while preventing seawater from flowing out. At the same time, the plastic transparent tube plays the role of a connecting vessel, which is convenient for users to observe the seawater level in the cabin. There are two groups of breathing tubes 12, corresponding to the bow and stern directions respectively.

[0042] The pressure resistance P of the sealing structure body when achieving the sealing effect is:

[0043]

[0044] in, is the density of seawater; g is the acceleration of gravity; h1 is the vertical distance from the seawater plane to the bottom of the ship. Since h1 is a dynamic value, the maximum draft of the hull is taken; h2 is the vertical distance from the sealing surface of the sealing structure body to the bottom of the ship, that is, the vertical distance from the pressure strip 13 or the surface of the deck in the cabin to the bottom of the ship; It is a self-set safety factor, and it is recommended to take 2, which means that the ability of the sealing structure to seal seawater is twice the maximum draft height of the hull.

[0045] The present invention can be extended to similar FPSOs of different sizes.

[0046] like Figure 5 As shown, the sealing structure effect model of the present invention verifies:

[0047] The focus of the present invention is the sealing structure, wherein the brand and model product selection of the glue layer 11 is not the focus of the present invention. When extended to different FPSOs or similar structures, the sizes are different, and the glue selection is also different. However, it is subject to the inherent size restrictions of the original structural design such as the V-shaped opening. In order to better verify the feasibility of the sealing structure design of the present invention, it is necessary to conduct model simulation tests on key parameters such as the product selection of the glue layer 11 and the thickness of the glue layer 11 before formal construction, and it can be implemented only after verification.

[0048] Firstly, according to the target gap structure - V-shaped opening, a gap simulation model of a V-shaped opening with a cross-sectional size of 1:1 is established. The lower part of the model is provided with an interface for pressurizing the test water. The upper part of the model is processed into a V-shaped opening according to the actual size. To simplify the model, the model only needs to be realistically restored in cross section. Therefore, the model can be made into a short box type with a length of 20~25cm. It is not necessary to make a ring with a diameter of 2~3 meters according to the actual ship size.

[0049] The gap simulation model is provided with a base 10, a pressure strip 13 and a support rod 14 inside. Since the model does not need to be made into a ring, the test purpose can be achieved by only making the cross section consistent. The length direction is consistent with the corresponding size of the short box type of the gap simulation model.

[0050] The lower inlet of the gap simulation model is connected to the pressure gauge 22, the valve 23, the water pump 24 and the water storage box 25 in sequence, and the middle is connected by a hose.

[0051] Gap simulation model test method:

[0052] S01. Install the base 10 in sequence according to the design, seal the base 10 and the gap simulation model on all sides, inject glue to form a glue layer 11, the thickness of the glue layer 11 is the design value h3, and install the pressure strip 13 and the support rod 14 after the glue layer 11 solidifies.

[0053] S02, open the valve 23, start the water pump 24 to pump water into the gap simulation model until the pressure gauge shows that the preset withstand pressure P (which can be set according to actual needs) is reached.

[0054] S03, close valve 23, then the gap simulates the water in the lower part of the model to form pressure, the pressure gauge can display the value, and the pressure is maintained for 2 to 4 hours. The observation time can be adjusted according to the actual situation.

[0055] S04. If no water seeps out of the glue layer 11 during the pressure test and the pressure gauge shows the value P, it means that the preset glue layer 11 and the thickness h3 of the glue layer 11 have passed the test and the next actual construction can be carried out. If water flows out through the glue layer 11 during the pressure test, it means that the sealing effect is poor. At this time, the glue product should be replaced or h3 should be thickened within the allowable range of the structural size and retested until it passes the test.

[0056] The present invention also provides a construction method for a waterproof sealing structure between a single-point buoy and a hull, comprising the following steps:

[0057] S1, test-fit the base 10 and the pressure strip 13. If they are not suitable, they need to be polished or replaced until it is confirmed that the base 10 of each arc segment can be assembled into a complete ring surface;

[0058] S2, adjust the draft of the hull 1 to below the plane of the layering strip 13 or the deck of the cabin, so that the natural pressure of the seawater cannot reach the space occupied by the glue layer 11, and use a grinder to grind the original structure in turn, and use a degreasing agent to wipe the surface of the V-shaped opening to increase the adhesion of the glue layer 11 after glue pouring;

[0059] S3, install the bottom bracket 10, and apply a small amount of sealant at the joints of each segmented bottom bracket 10 to form a complete ring surface. There are two special bottom brackets 10, on which the main pipe 21 of the breathing tube 12 is welded, and the positions are respectively in the bow direction and the stern direction of the hull 1;

[0060] S4, wait for the small amount of sealant to dry, and after confirming that the sealant will not leak into the space below the bottom support surface 15, start formal construction, pour a large amount of glue, and pour the glue once until the thickness of the glue layer 11 meets h3;

[0061] S5, wait for the glue layer 11 to dry, which usually takes 24 hours depending on the actual properties of the glue-filled product. After drying, install the pressure strip 13, add the tooling clip 17, tighten the support rod 14 until the lower end of the support rod 14 contacts the pressure strip 13, and apply appropriate pre-pressure. There are two special pressure strips 13, which have pre-punched holes. When installing, the holes pass through the main pipe 21 of the breathing tube 12, and no welding or bonding is required between the holes and the main pipe 21;

[0062] S6. Install the remaining breathing pipes 12, including the low-water-level drainage pipe 19 and the high-water-level connecting pipe 20, to restore the hull 1 to a normal draft.

[0063] After the sealing structure of the present invention is constructed, the single-point buoy 3 and the hull 1 are not separated under normal circumstances. They will be separated only when they are repaired in dock every 10 to 15 years. The service life of the glue layer 11 of the sealing structure of the present invention is less than 10 to 15 years. During the construction process, it will be considered to remove the old and fill the new. Even if the service life of the glue layer 11 has not been reached but it needs to be separated, it can be removed by common construction tools, lifted along the edge with a shovel, and then dragged by hand. In addition, the vertical falling force of the single-point buoy 3 when it is separated is in the order of 200 to 300 tons. The bonding force of the glue layer 11 is negligible relative to this force, and will not hinder the separation of the single-point buoy 3 and the hull 1.

[0064] The embodiments of the present invention are described in detail above, but the contents are only preferred embodiments of the present invention and cannot be considered to limit the scope of implementation of the present invention. All equivalent changes and improvements made within the scope of the present invention should still fall within the scope of the present invention.

Claims

1. A waterproof sealing structure for the gap between a single-point buoy and a hull, characterized in that: The invention comprises a sealing structure body, which is arranged circumferentially around the central axis of the single-point buoy, the sealing structure body comprises a bottom support, a glue-filled layer, a breathing tube, a layer and a strut, the top of the glue-filled layer is provided with a layer, and the strut is provided above the layer; a plurality of bottom supports are provided at the bottom of the glue-filled layer, the bottom support comprises a bottom support surface and a bottom support leg arranged at the bottom of the bottom support surface, the breathing tube comprises a connected main pipe, a low-point water level drainage pipe and a high-point water level connecting pipe, the lower end of the main pipe passes through the layer, the glue-filled layer and the bottom support surface, the upper end of the main pipe is respectively connected with the low-point water level drainage pipe and the high-point water level connecting pipe, the output end of the low-point water level drainage pipe is led to the deck of the hull, and the open mouth position of the high-point water level connecting pipe is higher than the sea level; the breathing tube is provided with two groups, which are respectively located at the bow and stern of the hull; the cross section of the glue-filled layer and the cross section of the layer are both It is in the shape of an inverted trapezoid; the pressure strip and the bottom support are both made of stainless steel metal; the height of the bottom support leg is higher than the limit block; the support rod is a screw with threaded threads, and a nut is arranged at the lower part of the support rod, and the contact area with the pressure strip is increased by the nut, and the upper part of the support rod is screwed into the thread of the tooling clip, and the upper and lower positions of the support rod are controlled by rotating the support rod to adjust it to contact with the pressure strip; the upper end of the tooling clip is connected to the upper edge of the single-point buoy through a top screw, and the lower end of the tooling clip is connected to the groove of the single-point buoy through a top screw; with the glue pouring layer as the center, the cross-section of the glue pouring layer is in the shape of an inverted trapezoid, and a complete sealing annular surface is formed by glue pouring, thereby blocking the V-shaped opening of the gap between the hull and the single-point buoy, playing a sealing role; the function of the bottom support surface is to establish a horizontal plane in the space of the V-shaped opening, and glue is poured on the bottom support surface, and the liquid will not leak into the lower space during glue pouring.

2. The waterproof sealing structure for the gap between the single-point buoy and the hull according to claim 1, characterized in that: The main pipe and the low-water-level drainage pipe are made of stainless steel pipes, and the high-water-level connecting pipe is made of plastic transparent pipe.

3. The waterproof sealing structure for the gap between the single-point buoy and the hull according to claim 1, characterized in that: The pressure resistance P of the sealing structure body when achieving the sealing effect is: in, is the density of seawater; g is the acceleration of gravity; h1 is the vertical distance from the seawater plane to the bottom of the ship. Since h1 is a dynamic value, the maximum draft of the hull is taken; h2 is the vertical distance from the sealing surface of the sealing structure body to the bottom of the ship. The vertical distance from the pressure strip or the deck surface of the cabin to the bottom of the ship is taken; is the safety factor.

4. A construction method for a waterproof sealing structure between a single-point buoy and a hull, used to realize the waterproof sealing structure between a single-point buoy and a hull as claimed in any one of claims 1 to 3, characterized in that: The following steps are involved: S1. Test-fit the base and the pressure strip. If they are not suitable, they need to be polished or replaced until it is confirmed that the base sections are assembled into a complete ring surface; S2. Adjust the hull draft to below the batten plane or the deck inside the cabin, so that the natural pressure of seawater cannot reach the space occupied by the glue layer. Grind and degrease the surface of the V-shaped opening to increase the adhesion of the glue layer after glue filling. S3. Install the bottom bracket, apply sealant at the joints of each section of the bottom bracket to form a complete ring surface, and weld the main pipes of the breathing tube to the bottom brackets in the bow and stern directions of the hull; S4, wait for the sealant to dry, and after confirming that the sealant will not leak into the space below the bottom support surface, start formal construction and pour the sealant to form a pouring layer; S5. Wait for the glue layer to dry. After drying, install the pressure strips, add tooling clips, tighten the support rods until the lower ends of the support rods contact the pressure strips, and apply pre-pressure. There are pre-punched holes on the pressure strips in the bow and stern directions of the hull. During installation, the holes pass through the main pipe of the breathing tube, and no welding or bonding is required between the holes and the main pipe. S6. Install the remaining breathing pipes, including the low-water-level drainage pipe and the high-water-level connecting pipe, to restore the normal draft of the hull.

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