A membrane tank and giant section closure process for ultra-large container ships

Abstract

The invention discloses a membrane cabin for an ultra-large container ship and a giant section closure process, comprising a membrane cabin, wherein a sealing structure is fixed to the bottom of the membrane cabin, the sealing structure is used to improve the stability of the membrane cabin, a protective structure is fixed above the sealing structure, the protective structure is used to prevent water from entering the membrane cabin due to waves and abnormal environment during transportation and docking; two support plates are fixed on both sides of the sealing structure, a fastening component is fixed on the support plate two on one side, the fastening component is used to connect with a tugboat, and a connecting hole one is opened on the support plate two on the other side of the sealing structure, the connecting hole one is used to connect with a gantry crane; the application solves the problems of stability, waterproofness and low construction efficiency of the current membrane cabin.

Description

Technical Field

[0001] The invention belongs to the technical field of ships, and in particular relates to a membrane cabin for an ultra-large container ship and a giant section closure process. Background Art

[0002] With the continuous development of global trade, the demand for ultra-large container ships is growing. Such ships are not only required to have greater loading capacity, but also to ensure safety and stability in harsh sea conditions. Among them, membrane tanks, as a key component of ultra-large container ships, are mainly used to store liquid cargoes such as liquefied natural gas (LNG). Their design and manufacturing process are crucial to the overall performance of the ship.

[0003] Traditional membrane tank designs often have some problems, such as insufficient stability, poor waterproof performance, and susceptibility to damage caused by waves and abnormal environment during transportation and docking. These problems not only affect the service life of the membrane tank, but may also pose a threat to the overall safety of the ship.

[0004] In addition, during the construction of ultra-large container ships, the assembly process of giant sections is also a technical difficulty. Traditional assembly processes are often inefficient and difficult to ensure the overall quality and stability of the ship. Especially when patching the membrane tank with the hull, the position and posture of each component must be precisely controlled to ensure the accuracy and reliability of the patching.

[0005] In order to solve the above problems, the present invention proposes a novel membrane tank for ultra-large container ships and a giant block closure process thereof. The membrane tank design improves the stability and waterproof performance of the membrane tank. At the same time, in the giant block closure process, the ship construction efficiency is improved. Summary of the invention

[0006] The purpose of the present invention is to provide a membrane tank for an ultra-large container ship and a giant section closure process to solve the problems raised in the above background technology.

[0007] In order to solve the above technical problems, the present invention provides a membrane tank for a super large container ship, comprising a membrane tank, characterized in that: the membrane tank comprises an inner cylinder, an end cover, an inner piston, a middle cylinder, an outer piston, an outer cylinder and a sealing cover, wherein:

[0008] The inner wall of the inner cylinder is provided with a plurality of radial holes, the radial holes are concentratedly distributed on the inner wall of the inner cylinder and are located on a side close to the fastening assembly, the end surface of the inner cylinder away from the fastening assembly is fixedly connected to the end cover, the end cover is provided with an axial hole, the outer portion of the inner cylinder is sleeved with the internal piston, the outer portion of the internal piston is in contact with the middle cylinder, the middle cylinder is a cylindrical member with openings at both ends, the middle cylinder contains the internal piston and the inner cylinder, and the internal piston slides between the middle cylinder and the inner cylinder;

[0009] An external piston is sleeved on the outside of the middle cylinder, the external piston contacts the outer cylinder, the outer cylinder contains the external piston and the middle cylinder, the inner space of the outer cylinder is communicated with that of the middle cylinder, the external piston slides between the outer cylinder and the middle cylinder, and both ends of the outer cylinder are fixedly connected to the sealing cover.

[0010] The present invention further describes that it also includes a sealing structure, wherein the bottom of the membrane cabin is embedded in the sealing structure, and the sealing structure is used to improve the stability of the membrane cabin. A protective structure is fixed above the sealing structure, and the protective structure is used to prevent water from entering the membrane cabin due to waves and abnormal environment during transportation and docking; support plates 2 are fixed on both sides of the sealing structure, and a fastening assembly is fixed on the support plate 2 on one side, and the fastening assembly is used to connect to the tugboat, and a connecting hole 1 is opened on the support plate 2 on the other side of the sealing structure, and the connecting hole 1 is used to connect to the gantry crane.

[0011] The present invention further describes that the sealing structure includes a sealing plate, a fixing block, a sealing strip, a folding plate and a hollow shaft, wherein:

[0012] The sealing plate wraps the bottom of the membrane cabin, and a water storage tank is opened inside the sealing plate. The water storage tank is used to store river water outside the membrane cabin to increase the overall quality of the membrane cabin. A plurality of sliding holes are opened on the surface of the sealing plate. The cross-section of the sliding holes is vertical. The sliding holes are distributed on both sides of the membrane cabin and are on the same horizontal plane. The sliding holes are opened from the outer wall of the membrane cabin to the water storage tank, and the sliding holes connect the water storage tank with the outside of the sealing plate.

[0013] The present invention further illustrates that the inner wall of the water storage tank is fixedly connected to the two fixed blocks, and the two fixed blocks are respectively located above and below the sliding hole, and the two ends of the folding plate are fixedly connected to the fixed blocks. The folding plate is hinged by a plurality of rectangular plates, and the folding plate is used to prevent external water from entering the water storage tank through the sliding hole when the sealing plate is on the river surface. A movable hole is opened in the center of the folding plate, and the movable hole partially overlaps with the sliding hole at a specific position, wherein the movable hole completely surrounds the sliding hole, and the folding plate is fixedly connected to the hollow shaft through the movable hole, and the hollow shaft slides in the sliding hole. The hollow shaft is a cylindrical structure, and the hollow shaft is used to guide water outside the sealing plate into the water storage tank.

[0014] The present invention further illustrates that the sealing structure further includes sealing strips, which are located on both sides of the sliding hole and fixedly connected to the sealing plate, and the sealing strips are used to further prevent water outside the sealing plate from entering the water storage tank, and the two sealing strips are in contact with both ends of the folding plate;

[0015] The sealing structure also includes a sealing bearing and a guide block, the sealing bearing is fixedly connected to a section of the hollow shaft, the sealing bearing is outside the sealing plate, the sealing bearing is fixedly connected to the guide block, the guide block is fixedly connected to the hollow shaft through the sealing bearing, the guide block is made of polypropylene, a plurality of guide holes are opened inside the guide block, the guide holes are vortex-shaped inside the guide block, the rotation direction of each guide hole is consistent, a section of each guide hole is opened on a side of the guide block away from the sealing plate, the other end of each guide hole is gathered at the center of a side of the guide block close to the sealing plate, and the guide hole is communicated with the hollow of the hollow shaft.

[0016] The present invention further describes that the protective structure includes a baffle plate, a sponge, a spring, a support plate and a sealing gasket, wherein:

[0017] The sealing gasket is in contact with the outer wall of the membrane cabin, and is used to protect the membrane cabin from water ingress, and the support plate plays a supporting and further waterproofing role;

[0018] The support plate 1 is fixed on the outside of the sealing gasket, and the support plate 1 is coated with an oil-proof coating. A plurality of springs are fixed on the support plate 1, and the springs are used to provide a certain elasticity and buffering effect. A baffle plate 1 is fixed on the plurality of springs, and a plurality of drainage holes are opened on the baffle plate 1, and the plurality of drainage holes are used to discharge river water. The sponge is fixed between the support plate 1 and the baffle plate 1, and the sponge is used to absorb river water.

[0019] The present invention further illustrates that the fastening assembly includes a connecting rod 1 and a connecting rod 2, the connecting rod 1 is fixedly connected to the supporting plate 2, and the supporting plate 2 is fixedly connected to the sealing plate;

[0020] The first connecting rod is connected to the second connecting rod bearing, and the surface of the second connecting rod is provided with a second connecting hole, and the second connecting hole is used for connecting with the tugboat and the gantry crane.

[0021] The present invention further states that the liquefied natural gas in the inner cylinder flows through the axial hole to between the middle cylinder and the inner cylinder.

[0022] The present invention further states that the radial holes are used for the circulation of liquefied natural gas, and the axial holes are used for the circulation of liquefied natural gas.

[0023] Another aspect of the present invention provides a process for assembling a giant section of an ultra-large container ship.

[0024] 1. Initial construction: First, the crew completed the construction of the stern rings 1-7;

[0025] 2. Preparation of the membrane tank: After the stern is constructed, the steps described in Example 1 are performed, which include transporting the membrane tank to the dock and removing the protective structure using a gantry crane. Subsequently, the membrane tank in the sealing structure is lifted out using a gantry crane and placed on the dock;

[0026] 3. Position adjustment and patching: Use the gantry crane to adjust the stern and the membrane cabin to the middle of the dock, leaving a distance of 5 rings. This space is used for patching the ship, that is, embedding the membrane cabin into the hull;

[0027] 4. Bow patching: After the membrane cabin is embedded in the hull, continue to patch the bow on the other side of the membrane cabin to complete the construction of the entire ship.

[0028] Compared with the prior art, the beneficial effects achieved by the present invention are:

[0029] The sealing structure effectively prevents the membrane cabin from being flooded due to waves and abnormal environment during transportation, ensuring the safe storage of liquefied natural gas in the cabin. The guide block and hollow shaft design in the sealing structure can automatically adjust the amount of water in the water tank according to the size of the waves and the shaking degree of the membrane cabin, thereby maintaining the stability of the membrane cabin in the water.

[0030] The multi-layer piston structure inside the membrane tank can convert the impact energy into heat energy and dissipate it into the air through the flow of liquefied natural gas and the movement of the piston when it is impacted. At the same time, the compressibility of the gas is used to absorb part of the impact energy, effectively reducing the impact of water flow impact on the hull structure.

[0031] The combination of baffles, sponges and springs in the protective structure can further absorb and disperse the impact energy of waves and protect the membrane cabin from damage.

[0032] The giant block assembly process of the present invention realizes efficient and orderly docking of the hull and the membrane cabin through the steps of preliminary construction, membrane cabin preparation, position adjustment and patching, bow patching, etc. This process greatly shortens the ship construction period and improves production efficiency. BRIEF DESCRIPTION OF THE DRAWINGS

[0033] The accompanying drawings are used to provide a further understanding of the present invention and constitute a part of the specification. Together with the embodiments of the present invention, they are used to explain the present invention and do not constitute a limitation of the present invention. In the accompanying drawings:

[0034] Figure 1 is a schematic diagram of the overall structure of an embodiment of the present invention;

[0035] Figure 2 is a schematic diagram of the internal structure of an embodiment of the present invention;

[0036] Figure 3 Embodiment of the present invention Figure 2 A schematic diagram of the enlarged structure of region A;

[0037] Figure 4 is a schematic diagram of the interior of a protective structure according to an embodiment of the present invention;

[0038] Figure 5 Embodiment of the present invention Figure 5 BB direction cross-sectional view;

[0039] Figure 6 is a cross-sectional view of a sealing structure according to an embodiment of the present invention;

[0040] Figure 7 Embodiment of the present invention Figure 1 A cross-sectional view of the C region;

[0041] Figure 8 is a front schematic diagram of a sealing structure according to an embodiment of the present invention;

[0042] Fig. 9 is a schematic diagram of the structure of a guide block according to an embodiment of the present invention;

[0043] Fig.10 is a schematic diagram of a membrane cabin located at a docking station according to an embodiment of the present invention;

[0044] Fig.11 is a schematic diagram of a stern of an embodiment of the present invention being located at a docking position;

[0045] Fig.12 It is a schematic diagram of the stern and the membrane tank of an embodiment of the present invention being located at the docking position when being patched;

[0046] Fig.13 Schematic diagram of the interlocking distance between the stern and the membrane tank according to an embodiment of the present invention;

[0047] Fig.14 2 is a schematic diagram of the completion of the patching of the stern and the membrane tank according to an embodiment of the present invention;

[0048] In the figure: 1, membrane cabin; 101, inner cylinder; 102, radial hole; 103, end cover; 104, axial hole; 105, middle cylinder; 106, external piston; 107, outer cylinder; 108, sealing cover; 109, internal piston;

[0049] 2. Sealing structure; 201. Sealing plate; 202. Water storage tank; 203. Sliding hole; 204. Fixed block; 205. Folding plate; 206. Sealing strip; 207. Moving hole; 208. Hollow shaft; 209. Sealed bearing; 210. Guide block; 211. Guide hole;

[0050] 3. Protective structure; 301. Baffle 1; 302. Sponge; 303. Spring; 304. Support plate 1; 305. Sealing pad; 306. Drain hole;

[0051] 4. Fastening assembly; 401. Connecting rod 1; 402. Connecting rod 2; 403. Connecting hole 2;

[0052] 5. Support plate 2; 501. Connection hole 1. DETAILED DESCRIPTION

[0053] The following is a further non-limiting detailed description of the technical solution of the present invention in conjunction with the preferred embodiments and the accompanying drawings. 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 creative work are within the scope of protection of the present invention.

[0054] In some cases see Figure 1-7 The embodiment of the present invention provides a technical solution: a membrane tank for an ultra-large container ship, comprising a membrane tank 1 and a sealing structure 2,

[0055] As shown in Figure 1, the bottom of the membrane cabin 1 is embedded in the sealing structure 2, and the sealing structure 2 is used to improve the stability of the membrane cabin 1. A protective structure 3 is fixed above the sealing structure 2 by bolts, and the protective structure 3 is used to prevent the membrane cabin 1 from being flooded due to waves and abnormal environment during transportation and docking; support plates 5 are fixed on both sides of the sealing structure 2, and a fastening component 4 is fixed on the support plate 5 on one side, and the fastening component 4 is used to connect with the tugboat, and a connecting hole 501 is opened on the support plate 5 on the other side of the sealing structure 2, and the connecting hole 501 is used to connect with the gantry crane.

[0056] like Figure 2 and Figure 3 As shown, in some embodiments, the membrane cabin 1 includes an inner cylinder 101, an end cover 103, an inner piston 109, a middle cylinder 105, an outer piston 106, an outer cylinder 107 and a sealing cover 108, wherein:

[0057] The inner wall of the inner cylinder 101 is provided with a plurality of radial holes 102, which are concentrated on the inner wall of the inner cylinder 101 and located on a side close to the fastening assembly 4, and the radial holes 102 are used for the circulation of liquefied natural gas. The end surface of the inner cylinder 101 on the side away from the fastening assembly 4 is fixedly connected to the end cover 103, and the end cover 103 is provided with an axial hole 104, and the axial hole 104 is used for the circulation of liquefied natural gas. The outer part of the inner cylinder 101 is sleeved with the internal piston 109, and the outer part of the internal piston 109 is in contact with the middle cylinder 105. The middle cylinder 105 is a cylindrical member with openings at both ends, and the middle cylinder 105 contains the internal piston 109 and the inner cylinder 101, and the internal piston 109 slides between the middle cylinder 105 and the inner cylinder 101, and the liquefied natural gas inside the inner cylinder 101 flows between the middle cylinder 105 and the inner cylinder 101 through the axial hole 104.

[0058] The outer part of the middle cylinder 105 is sleeved with an external piston 106, and the external piston 106 is in contact with the outer cylinder 107. The outer cylinder 107 contains the external piston 106 and the middle cylinder 105. The outer cylinder 107 is communicated with the internal space of the middle cylinder 105. The external piston 106 slides between the outer cylinder 107 and the middle cylinder 105. Both ends of the outer cylinder 107 are fixedly connected to the sealing cover 108 to ensure the sealing of the entire membrane cabin 1.

[0059] When the membrane cabin 1 is impacted, the liquefied natural gas inside the membrane cabin 1 will move in the opposite direction of the impact force. When the liquefied natural gas moves toward the end cover 103, it will flow to the middle cylinder 105 and the outer cylinder 107 through the axial hole 104. In this process, due to the narrow channel, the friction generated by the liquefied natural gas during the flow process will convert the impact energy into heat energy and dissipate it into the air. At the same time, when the liquefied natural gas collides with the internal piston 109 and the external piston 106, it drives the internal piston 109 and the external piston 106 to move, and the air on the other side of the internal piston 109 and the external piston 106 is compressed. The compressibility of the gas also helps to absorb part of the impact energy. In this way, the impact of water flow impact on the hull structure can be effectively reduced.

[0060] When the liquefied natural gas moves in the opposite direction of the end cover 103, it will flow to the middle cylinder 105 and the outer cylinder 107 through the radial holes 102. This process will also generate friction, converting the impact energy into heat energy, and using the compressibility of the gas to absorb part of the impact energy, achieving the same effect as the above process.

[0061] like Figure 5 , Figure 6 and Figure 8 As shown, in some embodiments, the sealing structure 2 includes a sealing plate 201, a fixing block 204, a sealing strip 206, a folding plate 205 and a hollow shaft 208, wherein:

[0062] The sealing plate 201 wraps the bottom of the membrane cabin 1, and a water tank 202 is opened inside the sealing plate 201. The water tank 202 is used to store river water outside the membrane cabin 1 to increase the overall quality of the membrane cabin 1. A plurality of sliding holes 203 are opened on the surface of the sealing plate 201. The cross-section of the sliding holes 203 is vertical. The sliding holes 203 are distributed on both sides of the membrane cabin 1 and are on the same horizontal plane. The sliding holes 203 are opened from the outer wall of the membrane cabin 1 to the water tank 202. The sliding holes 203 connect the water tank 202 with the outside of the sealing plate 201.

[0063] The inner wall of the water storage tank 202 is fixedly connected with the two fixed blocks 204, and the two fixed blocks 204 are respectively above and below the sliding hole 203. The two ends of the folding plate 205 are fixedly connected with the fixed blocks 204. The folding plate 205 is hinged by multiple rectangular plates. The folding plate 205 is used to prevent external water from entering the water storage tank 202 through the sliding hole 203 when the sealing plate 201 is on the river surface. A moving hole 207 is opened in the center of the folding plate 205. The moving hole 207 partially overlaps with the sliding hole 203 at a specific position, wherein the moving hole 207 completely surrounds the sliding hole 203. The folding plate 205 is fixedly connected with the hollow shaft 208 through the moving hole 207. The hollow shaft 208 slides in the sliding hole 203. The hollow shaft 208 is a cylindrical structure. The hollow shaft 208 is used to introduce water outside the sealing plate 201 into the water storage tank 202.

[0064] like Figure 6 As shown, in some embodiments, the sealing structure 2 also includes a sealing strip 206, which is located on both sides of the sliding hole 203 and fixedly connected to the sealing plate 201, and the sealing strip 206 is used to further prevent water outside the sealing plate 201 from entering the water storage tank 202, and the two sealing strips 206 are in contact with both ends of the folding plate 205.

[0065] The sealing structure 2 also includes a sealing bearing 209 and a guide block 210, wherein the sealing bearing 209 is fixedly connected to a section of the hollow shaft 208, the sealing bearing 209 is outside the sealing plate 201, the sealing bearing 209 is fixedly connected to the guide block 210, the guide block 210 is fixedly connected to the hollow shaft 208 through the sealing bearing 209, the guide block 210 is made of polypropylene, a plurality of guide holes 211 are provided inside the guide block 210, the guide holes 211 are vortex-shaped inside the guide block 210, the rotation direction of each of the guide holes 211 is consistent, a section of each of the guide holes 211 is provided on a side of the guide block 210 away from the sealing plate 201, the other end of each of the guide holes 211 is gathered at the center of a side of the guide block 210 close to the sealing plate 201, and the guide hole 211 is communicated with the hollow of the hollow shaft 208.

[0066] When the membrane cabin 1 is affected by waves during water transportation, the membrane cabin 1 shakes left and right, and the guide block 210 is made of polypropylene and is affected by buoyancy and floats on the horizontal plane, causing the guide blocks 210 at both ends of the membrane cabin 1 to be not on the same horizontal plane. At this time, the waves enter the water storage tank 202 through the guide hole 211 and the hollow shaft 208. During the entry process, the impact force of the water drives the guide block 210 to rotate, thereby reducing the impact force of the water on the membrane cabin 1. After the water enters the water storage tank 202, the overall mass of the membrane cabin 1 increases, and it is more stable in the water. At this time, the angle formed by the hollow shaft 208 and the horizontal plane is small, so that the water inside the water storage tank 202 is not easy to flow out.

[0067] When the waves of the membrane cabin 1 become smaller or are not affected by the waves during water transportation, the membrane cabin 1 tends to be stable, and the guide block 210 at the end of the membrane cabin 1 returns to the same horizontal plane. During this process, the guide block 210 will move downward along with the horizontal plane, and the water in the water tank 202 will be discharged outward through the guide hole 211 and the hollow shaft 208. At this time, the angle formed by the hollow shaft 208 and the horizontal plane is larger, making it easier for the water inside the water tank 202 to flow out.

[0068] like Figure 4 As shown, in some embodiments, the protection structure 3 includes a baffle 301, a sponge 302, a spring 303, a support plate 304 and a sealing gasket 305, wherein:

[0069] The sealing gasket 305 is in contact with the outer wall of the membrane cabin 1 , and is used to protect the membrane cabin 1 and prevent water from entering the membrane cabin 1 . The supporting plate 1 304 plays a supporting and further waterproofing role.

[0070] The support plate 304 is fixed on the outside of the sealing gasket 305, and the support plate 304 is fixed to the sealing plate 201 by bolts, so that the membrane cabin 1 is in the sealing structure 2 and the protective structure 3, and the support plate 304 is coated with an oil waterproof coating. A number of springs 303 are fixed on the support plate 304, and the springs 303 are used to provide a certain elasticity and buffering effect. Baffle plates 301 are fixed on several springs 303, and several drainage holes 306 are opened on the baffle plate 301, and several drainage holes 306 are used to discharge river water. The sponge 302 is fixed between the support plate 304 and the baffle plate 301, and the sponge 302 is used to absorb river water.

[0071] When the membrane cabin 1 is hit by water waves during transportation and docking, the baffle 1 301 first blocks most of the water waves to reduce the direct impact on the membrane cabin 1. Part of the water flows into the sponge 302 through the drainage hole 306, and the sponge 302 absorbs water to achieve a preliminary waterproof effect. If the impact of the water waves is too large, the pressure on the baffle 1 301 increases, and the spring 303 is compressed. At this time, the water in the sponge 302 can be discharged for a second time through the drainage hole 306, releasing the pressure and achieving reciprocating operation. This design not only reduces the impact of the water flow on the membrane cabin 1, but also effectively prevents water from entering the membrane cabin 1 through the water absorption and drainage functions of the sponge 302.

[0072] like Figure 7 As shown, in some embodiments, the fastening assembly 4 includes a connecting rod 1 401 and a connecting rod 2 402 , the connecting rod 1 401 is fixedly connected to the supporting plate 2 5 , and the supporting plate 2 5 is fixedly connected to the sealing plate 201 .

[0073] The connecting rod 1 401 is connected to the connecting rod 2 402 by a bearing. The connecting rod 2 402 is provided with a connecting hole 2 403 on its surface. The connecting hole 2 403 is used for connecting with a tugboat and a gantry crane.

[0074] When two ships are docking, the lifting rope of the gantry crane is connected to the connection hole 1 501 and the connection hole 2 403 respectively, the lifting crane separates the membrane cabin 1 from the ship and places the membrane cabin 1 on the water surface, and the membrane cabin 1 floats on the water surface under the action of the buoyancy of the water. The tugboat is connected to the connection hole 2 403 through the tow cable, and the tugboat is started to move the membrane cabin 1 to the target location.

[0075] Embodiment 1: In this embodiment, the loading and unloading of the membrane cabin 1 is realized when two ships are docked on the river surface, and the loading, unloading and movement of the membrane cabin 1 are realized by a tugboat and a gantry crane.

[0076] Specifically, when two ships are docking, the lifting rope of the gantry crane is connected to the connection hole 1 501 and the connection hole 2 403 respectively, the lifting crane separates the membrane cabin 1 from the ship and places the membrane cabin 1 on the water surface, and the membrane cabin 1 floats on the water surface under the action of the buoyancy of the water. The tugboat is connected to the connection hole 2 403 through the tow cable, and the tugboat is started to move the membrane cabin 1 to the target location.

[0077] When the membrane cabin 1 is impacted by waves during movement, the membrane cabin 1 shakes left and right, and the guide block 210 floats on the horizontal plane due to the influence of buoyancy, resulting in the guide blocks 210 at both ends of the membrane cabin 1 not being on the same horizontal plane. At this time, the waves enter the water storage tank 202 through the guide hole 211 and the hollow shaft 208. During the entry process, the impact force of the water drives the guide block 210 to rotate, thereby reducing the impact force of the water on the membrane cabin 1. After the water enters the water storage tank 202, the overall mass of the membrane cabin 1 increases, and it is more stable in the water. At this time, the angle formed by the hollow shaft 208 and the horizontal plane is small, so that the water inside the water storage tank 202 is not easy to flow out.

[0078] When the waves of the membrane cabin 1 become smaller or are not affected by the waves during water transportation, the membrane cabin 1 tends to be stable, and the guide block 210 at the end of the membrane cabin 1 returns to the same horizontal plane. During this process, the guide block 210 will move downward along with the horizontal plane, and the water in the water tank 202 will be discharged outward through the guide hole 211 and the hollow shaft 208. At this time, the angle formed by the hollow shaft 208 and the horizontal plane is larger, making it easier for the water inside the water tank 202 to flow out.

[0079] When the membrane cabin 1 is hit harder by waves during movement, the water surface has already submerged the guide block 210. At this time, the baffle 1 301 first blocks most of the waves to reduce their direct impact on the membrane cabin 1. Part of the water flows into the sponge 302 through the drainage hole 306, and the sponge 302 absorbs water to achieve a preliminary waterproof effect. If the impact of the waves is too large, the pressure on the baffle 1 301 increases, and the spring 303 is compressed. At this time, the water in the sponge 302 can be discharged for a second time through the drainage hole 306 to release the pressure and achieve reciprocating operation. This design not only reduces the impact force of the water flow on the membrane cabin 1, but also effectively prevents moisture from damaging the membrane cabin 1 and entering the interior of the membrane cabin 1 through the water absorption and drainage functions of the sponge 302.

[0080] When the membrane cabin 1 is affected by waves, the liquefied natural gas inside the membrane cabin 1 will move in the opposite direction of the impact force. When the liquefied natural gas moves toward the end cover 103, it will flow to the middle cylinder 105 and the outer cylinder 107 through the axial hole 104. In this process, due to the narrow channel, the oil will generate friction during the flow, thereby converting the impact energy into heat energy and dissipating it into the air. At the same time, the compressibility of the gas also helps to absorb part of the impact energy. In this way, the impact of water flow impact on the hull structure can be effectively reduced.

[0081] When the liquefied natural gas moves in the opposite direction of the end cover 103, it will flow to the middle cylinder 105 and the outer cylinder 107 through the radial holes 102. This process will also generate friction, converting the impact energy into heat energy, and using the compressibility of the gas to absorb part of the impact energy, achieving the same effect as the above process.

[0082] When the tugboat brings the membrane cabin 1 to the dock or the docked ship, the membrane cabin 1 is lifted into the hull by a gantry crane, and the docking is completed.

[0083] Embodiment 2: In this embodiment, if Figure 10-14 As shown, a process for assembling giant sections of ultra-large container ships is provided.

[0084] 1. Initial construction: First, the staff completed the construction of the stern rings 1-7.

[0085] 2. Preparation of membrane tank: After the stern is built, the steps described in Example 1 are carried out. This includes transporting the membrane tank 1 to the dock and removing the protective structure 3 using a gantry crane. Subsequently, the membrane tank 1 in the sealing structure 2 is lifted out using a gantry crane and placed on the dock.

[0086] 3. Position adjustment and patching: Use the gantry crane to adjust the stern and the membrane cabin 1 to the middle of the dock, leaving a distance of 5 rings. This space is used for patching the ship, that is, embedding the membrane cabin 1 with the hull.

[0087] 4. Bow patching: After the membrane cabin 1 is embedded in the hull, continue to patch the bow on the other side of the membrane cabin 1 to complete the construction of the entire ship.

[0088] In the description of the present invention, it is necessary to understand that the terms "up", "down", "front", "back", "left", "right", etc., indicating directions or positional relationships, are based on the directions or positional relationships shown in the accompanying drawings, and are only for the convenience of describing the present invention, and do not indicate or imply that the device or element referred to must have a specific direction, be constructed and operated in a specific direction, and therefore cannot be understood as a limitation on the present invention.

[0089] Finally, it should be pointed out that the above embodiments are only used to illustrate the technical solutions of the present invention, rather than to limit them. Although the present invention has been described in detail with reference to the above embodiments, a person skilled in the art should understand that the technical solutions described in the above embodiments can still be modified, or some of the technical features can be replaced by equivalents, and these modifications or replacements do not deviate the essence of the corresponding technical solutions from the spirit and scope of the technical solutions of the embodiments of the present invention.

Claims

1. A membrane tank for an ultra-large container ship, comprising a membrane tank and a sealing structure, characterized in that: The membrane chamber includes an inner cylinder, an end cover, an inner piston, a middle cylinder, an outer piston, an outer cylinder and a sealing cover, wherein: The inner wall of the inner cylinder is provided with a plurality of radial holes, which are concentrated on the inner wall of the inner cylinder and located on the side close to the fastening assembly. The end surface of the inner cylinder away from the fastening assembly is fixedly connected to the end cover, and the end cover is provided with an axial hole. The outer part of the inner cylinder is sleeved with the inner piston, and the outer part of the inner piston is in contact with the middle cylinder. The middle cylinder is a cylindrical component with openings at both ends, and the middle cylinder contains the inner piston and the inner cylinder, and the inner piston slides between the middle cylinder and the inner cylinder. The outer part of the middle cylinder is sleeved with an external piston, the external piston contacts the outer cylinder, the outer cylinder contains the external piston and the middle cylinder, the inner spaces of the outer cylinder and the middle cylinder are communicated, the external piston slides between the outer cylinder and the middle cylinder, and both ends of the outer cylinder are fixedly connected with the sealing cover; When the membrane tank is impacted, the liquefied natural gas flows through the radial holes or axial holes, and the impact energy is absorbed by channel friction and gas compression; The sealing structure includes a sealing plate, a fixing block, a sealing strip, a folding plate and a hollow shaft, wherein: The sealing plate wraps the bottom of the membrane cabin, a water storage tank is provided inside the sealing plate, and a plurality of sliding holes are provided on the surface of the sealing plate. The sliding holes have vertical cross-sections, are distributed on both sides of the membrane cabin and are on the same horizontal plane, and are opened from the outer wall of the membrane cabin to the water storage tank. The sliding holes connect the water storage tank with the outside of the sealing plate. The inner wall of the water storage tank is fixedly connected with two fixing blocks, which are respectively above and below the sliding hole. Both ends of the folding plate are fixedly connected with the fixing blocks. The folding plate is hinged by a plurality of rectangular plates. A moving hole is opened in the center of the folding plate. The moving hole and the sliding hole partially overlap at a specific position, wherein the moving hole completely surrounds the sliding hole. The folding plate is fixedly connected with the hollow shaft through the moving hole. The hollow shaft slides in the sliding hole, and the hollow shaft is a cylindrical structure. The sealing structure also includes sealing strips, which are located on both sides of the sliding hole and fixedly connected to the sealing plate, and the two sealing strips are in contact with both ends of the folding plate; The sealing structure also includes a sealing bearing and a guide block. The sealing bearing is fixedly connected to a section of the hollow shaft. The sealing bearing is outside the sealing plate. The sealing bearing is fixedly connected to the guide block. The guide block is fixedly connected to the hollow shaft through the sealing bearing. The guide block is made of polypropylene. Several guide holes are opened inside the guide block. The guide holes are vortex-shaped inside the guide block. The rotation direction of each guide hole is consistent. A section of each guide hole is opened on the side of the guide block away from the sealing plate. The other end of each guide hole is gathered at the center of the side of the guide block close to the sealing plate. The guide hole is connected to the hollow of the hollow shaft.

2. The membrane tank for a super large container ship according to claim 1, characterized in that: It also includes a sealing structure, in which the bottom of the membrane cabin is embedded in the sealing structure, and the sealing structure is used to improve the stability of the membrane cabin. A protective structure is fixed above the sealing structure, and the protective structure is used to prevent the membrane cabin from getting water in due to waves and abnormal environment during transportation and docking; two support plates are fixed on both sides of the sealing structure, and a fastening component is fixed on the support plate two on one side, and the fastening component is used to connect with the tugboat, and a connecting hole one is opened on the support plate two on the other side of the sealing structure, and the connecting hole one is used to connect with the gantry crane.

3. The membrane tank for a super large container ship according to claim 2, characterized in that: The protective structure includes a baffle plate 1, a sponge, a spring, a support plate 1 and a sealing gasket, wherein: The sealing gasket is in contact with the outer wall of the membrane cabin, and is used to protect the membrane cabin from water ingress, and the support plate plays a supporting and further waterproofing role; The support plate 1 is fixed on the outside of the sealing gasket, and the support plate 1 is coated with an oil-proof coating. A plurality of springs are fixed on the support plate 1, and the springs are used to provide a certain elasticity and buffering effect. A baffle plate 1 is fixed on the plurality of springs, and a plurality of drainage holes are opened on the baffle plate 1, and the plurality of drainage holes are used to discharge river water. The sponge is fixed between the support plate 1 and the baffle plate 1, and the sponge is used to absorb river water.

4. The membrane tank for a super large container ship according to claim 2, characterized in that: The fastening assembly comprises a first connecting rod and a second connecting rod, wherein the first connecting rod is fixedly connected to the second supporting plate, and the second supporting plate is fixedly connected to the sealing plate; The first connecting rod is connected to the second connecting rod bearing, and the surface of the second connecting rod is provided with a second connecting hole, and the second connecting hole is used for connecting with the tugboat and the gantry crane.

5. The membrane tank for a super large container ship according to claim 1, characterized in that: The liquefied natural gas in the inner cylinder flows through the axial hole to between the middle cylinder and the inner cylinder.

6. The membrane tank for a super large container ship according to claim 1, characterized in that: The radial holes are used for the circulation of liquefied natural gas, and the axial holes are used for the circulation of liquefied natural gas.

7. A giant block closure process for a membrane tank for an ultra-large container ship according to any one of claims 1 to 6, characterized in that:

1. Initial construction: First, the crew completed the construction of the stern rings 1-7; 2. Preparation of the membrane tank: After the stern is constructed, the steps described in Example 1 are performed, which include transporting the membrane tank to the dock and removing the protective structure using a gantry crane. Subsequently, the membrane tank in the sealing structure is lifted out using a gantry crane and placed on the dock; 3. Position adjustment and patching: Use the gantry crane to adjust the stern and the membrane cabin to the middle of the dock, leaving a distance of 5 rings. This space is used for patching the ship, that is, embedding the membrane cabin into the hull; 4. Bow patching: After the membrane cabin is embedded in the hull, continue to patch the bow on the other side of the membrane cabin to complete the construction of the entire ship.

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