Pressure-bearing capacity adjustable bulkhead structure, control method and crane ship

Abstract

The application relates to the technical field of ships, and particularly discloses a cabin wall structure with adjustable pressure-bearing capacity, a control method and a crane ship. The cabin wall structure with adjustable pressure-bearing capacity comprises a plurality of inflatable cabin walls, the plurality of inflatable cabin walls are used for being connected between a deck and a bottom plate of a ship body in a vertical direction, the inflatable cabin walls are configured to be selectively filled with high-pressure gas, the plurality of inflatable cabin walls comprise a first inflatable cabin wall in the shape of a circular ring, a plurality of second inflatable cabin walls arranged in a transverse direction, a plurality of third inflatable cabin walls arranged in a longitudinal direction and a plurality of fourth inflatable cabin walls arranged in an oblique direction, and at least the first inflatable cabin wall is arranged directly below a base of a crane. When the crane is working, the inflatable cabin walls are filled with high-pressure gas, the pressure-bearing capacity of the inflatable cabin walls can be significantly improved, the pressure-bearing capacity requirement of the ship body below the crane under the crane working state is met, and therefore the inflatable cabin walls do not need to be made of thick and heavy materials, and the weight of the tail part of the crane ship can be effectively reduced.

Description

Technical Field

[0001] This invention relates to the field of marine technology, and in particular to a bulkhead structure with adjustable pressure bearing capacity, a control method, and a crane vessel. Background Technology

[0002] Crane vessels are used for offshore construction operations, and the reinforced area under the main crane at the stern is a critical part of the structural design. During main crane operation, this reinforced area experiences significant vertical pressure, exceeding the pressure experienced by the structure at this location during the crane vessel's navigation. Related technologies typically involve installing a cylindrical bulkhead of equal size below the crane base to effectively connect with the hull components, while also adding multiple local longitudinal and transverse bulkheads as reinforcement for the main crane base. This undoubtedly increases the weight at the stern of the crane vessel. Furthermore, during lifting operations, ballast water needs to be added to the bow ballast tanks to balance the ship's trim caused by the excessive weight at the stern. The increased stern weight means more ballast water is required to balance the trim, thus increasing the still water moment near the midships. This necessitates larger dimensions for the midships structural components to meet strength requirements.

[0003] Therefore, how to reduce the size of components while ensuring that the reinforced structure under the crane has sufficient load-bearing capacity in operation, so as to achieve the purpose of structural weight reduction, is a key technical challenge in the design of crane vessels. Summary of the Invention

[0004] The purpose of this invention is to provide a bulkhead structure with adjustable pressure-bearing capacity, so as to ensure that the reinforcing structure under the crane has sufficient pressure-bearing capacity in the working state, while reducing its component size, so as to achieve the purpose of structural weight reduction.

[0005] On one hand, the present invention provides a bulkhead structure with adjustable pressure bearing capacity, the bulkhead structure comprising a plurality of inflatable bulkheads, the plurality of inflatable bulkheads being used to connect vertically between the deck and the bottom plate of the hull, the inflatable bulkheads being configured to selectively fill with high-pressure gas, the plurality of inflatable bulkheads comprising a first inflatable bulkhead in a circular shape, a plurality of second inflatable bulkheads arranged laterally, a plurality of third inflatable bulkheads arranged longitudinally, and a plurality of fourth inflatable bulkheads arranged obliquely, at least the first inflatable bulkhead being used to be disposed directly below the base of a crane.

[0006] As one technical solution for a bulkhead structure with adjustable pressure resistance, the second inflatable bulkhead adopts any of the following connection methods: One end of the second inflatable bulkhead is used to connect to the outer plating of the hull, and the other end is connected to the third inflatable bulkhead; The two ends of the second inflatable bulkhead are respectively used to connect to the outer plates on the left and right sides of the hull; The two ends of the second inflatable chamber wall are respectively connected to the two third inflatable chamber walls; both ends of the second inflatable chamber wall are connected to the first inflatable chamber wall.

[0007] As one technical solution for a bulkhead structure with adjustable pressure resistance, the third inflatable bulkhead adopts any of the following connection methods: One end of the third inflatable bulkhead is used to connect with the stern sealing plate of the hull, and the other end is connected with the second inflatable bulkhead; The third inflatable bulkhead is connected between the two second inflatable bulkheads.

[0008] As one technical solution for a bulkhead structure with adjustable pressure resistance, the fourth inflatable bulkhead adopts any of the following connection methods: One end of the fourth inflatable chamber wall is connected to the third inflatable chamber wall, and the other end is connected to the first inflatable chamber wall. One end of the fourth inflatable chamber wall is connected to the second inflatable chamber wall, and the other end is connected to the first inflatable chamber wall.

[0009] As one technical solution for a bulkhead structure with adjustable pressure bearing capacity, the inflatable bulkhead includes multiple vertical inflatable steel pipes and multiple vertical steel plates, and the multiple vertical inflatable steel pipes and multiple vertical steel plates are sequentially and spaced apart along the extension direction of the inflatable bulkhead.

[0010] As one of the technical solutions for a bulkhead structure with adjustable pressure bearing capacity, the inflatable bulkhead also includes a transverse inflatable steel pipe, which is connected to each of the vertical inflatable steel pipes and each of the vertical steel plates, and the transverse inflatable steel pipe is in communication with each of the vertical inflatable steel pipes.

[0011] The pressure-bearing capacity adjustable bulkhead structure provided by this invention has at least the following beneficial effects: The pressure-bearing capacity adjustable bulkhead structure includes multiple inflatable bulkheads, each of which is used to connect vertically between the deck and the bottom plate of the hull. The inflatable bulkheads are configured to be selectively filled with high-pressure gas. The multiple inflatable bulkheads include a first inflatable bulkhead in a circular shape, several second inflatable bulkheads arranged laterally, several third inflatable bulkheads arranged longitudinally, and several fourth inflatable bulkheads arranged obliquely. At least the first inflatable bulkhead is used to be located directly below the base of the crane. The pressure-bearing capacity adjustable bulkhead structure provided in this embodiment supports the crane through an inflatable bulkhead. When the crane is working, high-pressure gas is injected into the inflatable bulkhead, which increases the critical buckling stress of the inflatable bulkhead and thus enhances its pressure-bearing capacity to meet the pressure-bearing capacity requirements of the hull below the crane during crane operations. When the crane is not working, there is no need to inject high-pressure gas into the inflatable bulkhead, as the air pressure inside the inflatable bulkhead is the same as the external atmospheric pressure, which can meet the pressure-bearing requirements of the crane ship during navigation. Compared with the prior art, this effectively reduces the structural strength requirements of the inflatable bulkhead in the non-inflated state, thus eliminating the need for heavy materials in the inflatable bulkhead and effectively reducing the weight of the pressure-bearing capacity adjustable bulkhead structure.

[0012] Secondly, the present invention provides a control method for a bulkhead structure with adjustable pressure bearing capacity. This control method is implemented using a bulkhead structure with adjustable pressure bearing capacity as described in any of the above-mentioned embodiments. The control method for the bulkhead structure with adjustable pressure bearing capacity includes: Obtain the crane start command and, before starting the crane, fill each of the inflatable chamber walls with high-pressure gas.

[0013] As one technical solution for controlling a bulkhead structure with adjustable pressure bearing capacity, the control method for the bulkhead structure with adjustable pressure bearing capacity further includes: When no start command is received from the crane, each of the inflatable chamber walls is made to communicate with the outside atmosphere.

[0014] The control method for the pressure-bearing capacity adjustable bulkhead structure provided in this embodiment has at least the following technical effects: The control method for the pressure-bearing capacity adjustable bulkhead structure includes: obtaining the crane's start command and injecting high-pressure gas into each inflatable bulkhead before starting the crane. In this embodiment, the control method for the pressure-bearing capacity adjustable bulkhead structure ensures that, after the crane starts, high-pressure gas is injected into both the vertical and horizontal inflatable steel pipes of each inflatable bulkhead. This increases the critical buckling stress of each inflatable bulkhead, thereby enhancing its pressure-bearing capacity to meet the pressure-bearing requirements of the hull below the crane during crane operations.

[0015] Thirdly, the present invention provides a crane vessel, including a bulkhead structure with adjustable pressure bearing capacity as described in any of the above embodiments. The crane vessel also includes a hull and a crane. The bulkhead structure with adjustable pressure bearing capacity is connected between the deck and the bottom plate of the hull, and the bulkhead structure with adjustable pressure bearing capacity is located below the crane.

[0016] The crane vessel provided by this invention has at least the following beneficial effects: The crane vessel includes the aforementioned adjustable-pressure-capacity bulkhead structure. It also includes a hull and a crane. The adjustable-pressure-capacity bulkhead structure is connected between the deck and bottom plate of the hull and is located below the crane. In this embodiment, the crane vessel employs this adjustable-pressure-capacity bulkhead structure. When the crane is operating, by inflating the inflatable bulkhead with high-pressure gas, the critical buckling stress of the inflatable bulkhead can be increased, thereby enhancing its pressure-capacity to meet the requirements of the crane under lifting operations. The pressure-bearing capacity requirement of the hull is such that when the crane is not in operation, there is no need to fill the inflatable bulkhead with high-pressure gas. The air pressure inside the inflatable bulkhead is the same as the external atmospheric pressure, which can meet the pressure-bearing requirements of the crane ship in the sailing state. This can effectively reduce the weight of the bulkhead structure with adjustable pressure-bearing capacity, thereby reducing the weight of the stern of the crane ship. It also reduces the amount of ballast water added to the bow ballast tank during crane operations, thereby reducing the static bending moment near the midships of the hull, reducing the strength requirements of the midships structural components, and thus reducing the size requirements of the midships structural components. Attached Figure Description

[0017] Figure 1 This is a first structural schematic diagram of a bulkhead structure with adjustable pressure bearing capacity in an embodiment of the present invention; Figure 2 This is a schematic diagram of the second structure of the pressure-bearing capacity adjustable bulkhead structure in an embodiment of the present invention; Figure 3 This is a schematic diagram of the third structure of the pressure-bearing capacity adjustable bulkhead structure in an embodiment of the present invention; Figure 4 This is a partial structural diagram of the inflatable cabin wall in an embodiment of the present invention.

[0018] In the picture: 100. First inflatable bulkhead; 200. Second inflatable bulkhead; 300. Third inflatable bulkhead; 400. Fourth inflatable bulkhead; 1. Vertical inflatable steel pipe; 2. Vertical steel plate; 3. Horizontal inflatable steel pipe; 4. Steel pipe connection joint. Detailed Implementation

[0019] The technical solution of the present invention will now be clearly and completely described with reference to the accompanying drawings. Obviously, the described embodiments are only some, not all, of the embodiments of the present invention. Based on the embodiments of the present invention, all other embodiments obtained by those skilled in the art without creative effort are within the scope of protection of the present invention.

[0020] In the description of this invention, it should be noted that the terms "center," "upper," "lower," "left," "right," "vertical," "horizontal," "inner," and "outer," etc., indicate the orientation or positional relationship based on the orientation or positional relationship shown in the accompanying drawings. They are used only for the convenience of describing the invention and for simplifying the description, and do not indicate or imply that the device or element referred to must have a specific orientation, or be constructed and operated in a specific orientation. Therefore, they should not be construed as limitations on the invention. Furthermore, the terms "first" and "second" are used for descriptive purposes only and should not be construed as indicating or implying relative importance. The terms "first position" and "second position" refer to two different positions. Furthermore, "above," "on top of," and "over" the first feature in relation to the second feature includes the first feature directly above and diagonally above the second feature, or simply indicates that the first feature is at a higher horizontal level than the second feature. "Below," "under," and "below" the first feature in relation to the second feature includes the first feature directly below and diagonally below the second feature, or simply indicates that the first feature is at a lower horizontal level than the second feature.

[0021] In the description of this invention, it should be noted that, unless otherwise explicitly specified and limited, the terms "installation," "connection," and "linking" should be interpreted broadly. For example, they can refer to a fixed connection, a detachable connection, or an integral connection; they can refer to a mechanical connection or an electrical connection; they can refer to a direct connection or an indirect connection through an intermediate medium; and they can refer to the internal connection of two components. Those skilled in the art can understand the specific meaning of the above terms in this invention based on the specific circumstances.

[0022] Embodiments of the present invention are described in detail below. Examples of these embodiments are shown in the accompanying drawings, wherein the same or similar reference numerals denote the same or similar elements or elements having the same or similar functions throughout. The embodiments described below with reference to the accompanying drawings are exemplary and are only used to explain the present invention, and should not be construed as limiting the present invention.

[0023] Crane vessels are used for offshore construction operations, and the reinforced area under the crane at the stern of the main crane vessel is a critical part of its structural design. During crane operation, this reinforced area bears significant vertical pressure, exceeding the vertical pressure experienced by the structure at this location when the crane vessel is in motion. In related technologies, a cylindrical bulkhead of the same size is typically installed below the main crane base to effectively connect with the hull components, while multiple local longitudinal and transverse bulkheads are added as reinforcements for the main crane base. This undoubtedly increases the weight at the stern of the crane vessel. Furthermore, during crane operations, ballast water needs to be added to the bow ballast tanks to balance the trim caused by the excessive weight at the stern. The increased weight at the stern means more ballast water is needed to balance the trim, thus increasing the still water moment near the midships. This necessitates larger structural components in the midships to meet strength requirements. Therefore, how to reduce the size of the components while ensuring sufficient load-bearing capacity under the crane during operation, thereby achieving structural weight reduction, is a key technical challenge in crane vessel design.

[0024] To address this issue, this embodiment provides a bulkhead structure with adjustable pressure bearing capacity. This bulkhead structure with adjustable pressure bearing capacity can be applied to a crane vessel, wherein the crane vessel has a crane at the stern and a ballast tank at the bow.

[0025] Figure 1 This is a first structural schematic diagram of a bulkhead structure with adjustable pressure bearing capacity in an embodiment of the present invention; Figure 2 This is a schematic diagram of the second structure of the pressure-bearing capacity adjustable bulkhead structure in an embodiment of the present invention; Figure 3 This is a schematic diagram of the third structure of the pressure-bearing capacity adjustable bulkhead structure in an embodiment of the present invention; Figure 4 This is a partial structural diagram of the inflatable cabin wall in an embodiment of the present invention. Please refer to 1 to 2. Figure 4The pressure-adjustable bulkhead structure includes multiple inflatable bulkheads, each of which is used to connect vertically between the deck and the bottom plate of the hull. The inflatable bulkheads are configured to be selectively filled with high-pressure gas. The multiple inflatable bulkheads include a first inflatable bulkhead 100 in a circular shape, several second inflatable bulkheads 200 arranged laterally, several third inflatable bulkheads 300 arranged longitudinally, and several fourth inflatable bulkheads 400 arranged obliquely. At least the first inflatable bulkhead 100 is used to be located directly below the base of the crane. This design supports the crane through inflatable bulkheads. When the crane is operating, high-pressure gas is injected into the inflatable bulkheads, increasing their critical buckling stress and thus their pressure-bearing capacity. This meets the pressure-bearing requirements of the hull beneath the crane during crane operations. When the crane is not operating, there is no need to inject high-pressure gas into the inflatable bulkheads, as the air pressure inside the bulkheads is the same as the external atmospheric pressure, which meets the pressure requirements of the crane vessel during navigation. Compared to existing technologies, this design effectively reduces the structural strength requirements of the inflatable bulkheads in their non-inflated state. Consequently, the inflatable bulkheads do not require heavy materials, effectively reducing the overall weight of the adjustable-pressure-bearing bulkhead structure and thus reducing the weight of the stern of the crane vessel.

[0026] It should be noted that longitudinal, transverse, and diagonal directions are all relative to the length direction of the crane vessel. The transverse direction is perpendicular to the length direction of the crane vessel, the longitudinal direction is parallel to the length direction of the crane vessel, and the diagonal direction is located between the transverse and longitudinal directions and is set at an angle to both the transverse and longitudinal directions. For example, the diagonal direction can be at 45° to both the transverse and longitudinal directions; or at 30° to the transverse direction and 60° to the longitudinal direction; or at 60° to the transverse direction and 30° to the longitudinal direction.

[0027] In addition, the number of the second inflatable bulkhead 200 can be set according to actual needs, and there can be one or more; the number of the third inflatable bulkhead 300 can be set according to actual needs, and there can be one or more; the number of the fourth inflatable bulkhead 400 can be set according to actual needs, and there can be one or more.

[0028] In some embodiments, please refer to Figure 4The inflatable bulkhead includes multiple vertical inflatable steel pipes 1 and multiple vertical steel plates 2, which are sequentially spaced apart along the extension direction of the inflatable bulkhead. Specifically, in this embodiment, in the first inflatable bulkhead 100, multiple vertical inflatable steel pipes 1 and multiple vertical steel plates 2 are sequentially spaced apart along the circumferential direction and connected end to end. In the second inflatable bulkhead 200, multiple vertical inflatable steel pipes 1 and multiple vertical steel plates 2 are sequentially spaced apart along the transverse direction; in the third inflatable bulkhead 300, multiple vertical inflatable steel pipes 1 and multiple vertical steel plates 2 are sequentially spaced apart along the longitudinal direction; and in the fourth inflatable bulkhead 400, multiple vertical inflatable steel pipes 1 and multiple vertical steel plates 2 are sequentially spaced apart along the oblique direction. In each inflatable bulkhead, each vertical inflatable steel pipe 1 is used for selectively filling with high-pressure gas.

[0029] In some embodiments, please refer to Figure 4 The inflatable bulkhead also includes transverse inflatable steel pipes 3, which are connected to each vertical inflatable steel pipe 1 and each vertical steel plate 2, and are also connected to each vertical inflatable steel pipe 1. With this configuration, when inflating the inflatable bulkhead, only the transverse inflatable steel pipes 3 need to be inflated to simultaneously fill each vertical inflatable steel pipe 1, thus improving inflation efficiency.

[0030] It should be noted that the number of transverse inflatable steel tubes 3 in each inflatable bulkhead can be set according to the spacing between the deck and the bottom plate, and can be one or more.

[0031] In some embodiments, please refer to Figures 1 to 3 The second inflatable bulkhead 200 adopts any of the following connection methods: one end of the second inflatable bulkhead 200 is used to connect to the outer plate of the hull, and the other end is connected to the third inflatable bulkhead 300; both ends of the second inflatable bulkhead 200 are used to connect to the outer plates of the left and right sides of the hull respectively; both ends of the second inflatable bulkhead 200 are connected to the two third inflatable bulkheads 300 respectively; both ends of the second inflatable bulkhead 200 are connected to the first inflatable bulkhead 100.

[0032] in, Figure 2 The diagram shows a scheme in which both ends of the second inflatable bulkhead 200 are respectively connected to two third inflatable bulkheads 300, and when both ends of the second inflatable bulkhead 200 are respectively connected to two third inflatable bulkheads 300, the number of third inflatable bulkheads 300 is multiple. Figure 3 The diagram shows a scheme in which both ends of the second inflatable bulkhead 200 are connected to the first inflatable bulkhead 100.

[0033] Additionally, it should be noted that when there are multiple second inflatable bulkheads 200, the connection method of each second inflatable bulkhead 200 can be any of the connection methods of the second inflatable bulkheads 200 mentioned above.

[0034] In some embodiments, please refer to Figures 1 to 3 The third inflatable bulkhead 300 adopts any of the following connection methods: one end of the third inflatable bulkhead 300 is used to connect with the stern plate of the hull, and the other end is connected with the second inflatable bulkhead 200; the third inflatable bulkhead 300 is connected between two second inflatable bulkheads 200.

[0035] in, Figure 2 The diagram shows a scheme in which a third inflatable bulkhead 300 is connected between two second inflatable bulkheads 200, and when the third inflatable bulkhead 300 is connected between two second inflatable bulkheads 200, the number of second inflatable bulkheads 200 is multiple.

[0036] Additionally, it should be noted that when there are multiple third inflatable bulkheads 300, the connection method of each third inflatable bulkhead 300 can be any of the connection methods of the third inflatable bulkhead 300 mentioned above.

[0037] In some embodiments, please refer to Figures 1 to 3 The fourth inflatable bulkhead 400 adopts any of the following connection methods: one end of the fourth inflatable bulkhead 400 is connected to the third inflatable bulkhead 300 and the other end is connected to the first inflatable bulkhead 100; one end of the fourth inflatable bulkhead 400 is connected to the second inflatable bulkhead 200 and the other end is connected to the first inflatable bulkhead 100.

[0038] in, Figures 1 to 3 Both designs show a configuration where one end of the fourth inflatable bulkhead 400 is connected to the second inflatable bulkhead 200 and the other end is connected to the first inflatable bulkhead 100.

[0039] Additionally, it should be noted that when there are multiple fourth inflatable bulkheads 400, the connection method of each fourth inflatable bulkhead 400 can be any of the connection methods of the fourth inflatable bulkheads 400 mentioned above.

[0040] In some embodiments, please refer to Figures 1 to 3The middle portion of the second inflatable bulkhead 200 is connected to the third inflatable bulkhead 300; or, the middle portion of the second inflatable bulkhead 200 is connected to the first inflatable bulkhead 100; or, the middle portion of the second inflatable bulkhead 200 is simultaneously connected to both the third inflatable bulkhead 300 and the first inflatable bulkhead 100; or, the middle portion of the second inflatable bulkhead 200 is not connected to either the third inflatable bulkhead 300 or the first inflatable bulkhead 100.

[0041] When the middle part of the second inflatable bulkhead 200 is connected to the third inflatable bulkhead 300, the number of third inflatable bulkheads 300 connected to the middle part of the second inflatable bulkhead 200 can be one or more.

[0042] Additionally, it should be noted that the middle part of the second inflatable bulkhead 200 refers to the portion between the two ends of the second inflatable bulkhead 200.

[0043] In some embodiments, please refer to Figures 1 to 3 The middle portion of the third inflatable bulkhead 300 is connected to the second inflatable bulkhead 200; or, the middle portion of the third inflatable bulkhead 300 is connected to the first inflatable bulkhead 100; or, the middle portion of the third inflatable bulkhead 300 is simultaneously connected to both the second inflatable bulkhead 200 and the first inflatable bulkhead 100; or, the middle portion of the third inflatable bulkhead 300 is not connected to either the second inflatable bulkhead 200 or the first inflatable bulkhead 100.

[0044] When the middle part of the third inflatable bulkhead 300 is connected to the second inflatable bulkhead 200, the number of second inflatable bulkheads 200 connected to the middle part of the third inflatable bulkhead 300 can be one or more.

[0045] Additionally, it should be noted that the middle part of the third inflatable bulkhead 300 refers to the portion between the two ends of the third inflatable bulkhead 300.

[0046] In some embodiments, the transverse inflatable steel pipes 3 of the two interconnected inflatable bulkheads are connected by a steel pipe connector 4. With this configuration, when inflating the interconnected inflatable bulkheads, only the transverse inflatable steel pipe 3 of one of the inflatable bulkheads needs to be inflated, further improving inflation efficiency.

[0047] This embodiment also provides a control method for a bulkhead structure with adjustable pressure bearing capacity, which is implemented through the aforementioned bulkhead structure with adjustable pressure bearing capacity.

[0048] The control methods for this pressure-bearing capacity adjustable bulkhead structure include: Receive the crane start command and fill each inflatable chamber with high-pressure gas before starting the crane.

[0049] With this control, when the crane starts, high-pressure gas is filled into the vertical inflatable steel pipes 1 and the horizontal inflatable steel pipes 3 in each inflatable bulkhead. This can increase the critical buckling stress of each inflatable bulkhead, thereby increasing the pressure-bearing capacity of the inflatable bulkhead to meet the pressure-bearing capacity requirements of the hull below the crane during lifting operations.

[0050] In this embodiment, the pressure of the high-pressure gas injected into the inflatable chamber can be set in advance according to the maximum load of the crane, and is set to a fixed value. It is also necessary to ensure that the pressure bearing capacity of the inflatable chamber after the high-pressure gas is injected can meet the requirements of the crane to work stably at the maximum load.

[0051] In other embodiments, the pressure of the high-pressure gas injected into the inflatable bulkhead can be adjusted in real time according to the actual load of the crane. It is also necessary to ensure that the gas pressure injected into the inflatable bulkhead is sufficient to guarantee the pressure-bearing capacity of the inflatable bulkhead, allowing the crane to operate stably under the current load. The gas pressure can be adjusted using a pressure regulating valve installed in the inflation pipeline.

[0052] In some embodiments, the control method for the pressure-bearing capacity adjustable bulkhead structure further includes: when no crane start command is received, making each inflatable bulkhead connected to the outside atmosphere. At this time, the gas pressure in the vertical inflatable steel pipe 1 and the transverse inflatable steel pipe 3 of each inflatable bulkhead is the outside atmospheric pressure. At this time, the inflatable bulkhead bears pressure based on its own material properties, and the pressure-bearing capacity of the inflatable bulkhead can ensure the normal navigation requirements of the crane ship.

[0053] This embodiment also provides a crane vessel, which includes the aforementioned adjustable pressure-bearing bulkhead structure. The crane vessel also includes a hull and a crane. The adjustable pressure-bearing bulkhead structure is connected between the deck and the bottom plate of the hull and is located below the crane. The crane vessel employs the aforementioned adjustable-pressure-bearing-capacity bulkhead structure. When the crane is operating, high-pressure gas is injected into the inflatable bulkhead, increasing its critical buckling stress and thus its pressure-bearing capacity. This meets the pressure-bearing requirements of the hull below the crane during crane operations. When the crane is not operating, there is no need to inject high-pressure gas into the inflatable bulkhead, as the air pressure inside the inflatable bulkhead is the same as the external atmospheric pressure, satisfying the pressure requirements of the crane vessel during navigation. This effectively reduces the weight of the adjustable-pressure-bearing-capacity bulkhead structure, thereby reducing the weight at the stern of the crane vessel. It also reduces the amount of ballast water added to the bow ballast tank during crane operations, thus reducing the hydrostatic bending moment near the midship section and lowering the strength requirements for the midship structural components, as well as the dimensional requirements for the midship structural components.

[0054] In some embodiments, the first inflatable bulkhead 100 is located directly below the base of the crane. Preferably, the outer diameter of the first inflatable bulkhead 100 matches the outer radial direction of the base.

[0055] Regarding the second inflatable bulkhead 200, when there is one or two second inflatable bulkheads 200, each second inflatable bulkhead 200 can be located at least partially directly below the base of the crane; when there are two or more second inflatable bulkheads 200, the second inflatable bulkheads 200 can be divided into three parts, such that the first part of the second inflatable bulkheads 200 is entirely located to the side and below the base of the crane; the second part of the second inflatable bulkheads 200 is entirely located directly below the base of the crane; and in the third part of the second inflatable bulkheads 200, each second inflatable bulkhead 200 is partially located directly below the base of the crane, and partially located to the side and below the base of the crane.

[0056] Regarding the third inflatable bulkhead 300, when there is one or two third inflatable bulkheads 300, each third inflatable bulkhead 300 can be located at least partially directly below the crane base; when there are two or more third inflatable bulkheads 300, the third inflatable bulkheads 300 can be divided into three parts, such that the first part of the third inflatable bulkheads 300 is entirely located to the side and below the crane base; the second part of the third inflatable bulkheads 300 is entirely located directly below the crane base; and in the third part of the third inflatable bulkheads 300, each third inflatable bulkhead 300 is partially located directly below the crane base and partially located to the side and below the crane base.

[0057] It should be noted that when the inflatable bulkhead is located to the side and below the crane's base, it also helps to improve the pressure resistance of the hull below the crane.

[0058] The above description is merely a preferred embodiment of the present invention and an explanation of the technical principles employed. Those skilled in the art should understand that the scope of disclosure in this invention is not limited to technical solutions formed by specific combinations of the above-described technical features, but should also cover other technical solutions formed by arbitrary combinations of the above-described technical features or their equivalents without departing from the above-disclosed concept. For example, technical solutions formed by substituting the above features with (but not limited to) technical features with similar functions disclosed in this invention.

[0059] Furthermore, while several specific implementation details are included in the above discussion, these should not be construed as limiting the scope of the invention. Certain features described in the context of individual embodiments may also be implemented in combination in a single embodiment. Conversely, various features described in the context of a single embodiment may also be implemented individually or in any suitable sub-combination in multiple embodiments.

[0060] Although the subject matter has been described using language specific to structural features and / or methodological logic, it should be understood that the subject matter defined in the appended claims is not necessarily limited to the specific features or actions described above. Rather, the specific features and actions described above are merely illustrative examples of implementing the claims.

Claims

1. A bulkhead structure with adjustable pressure-bearing capacity, characterized in that, The pressure-bearing capacity adjustable bulkhead structure includes multiple inflatable bulkheads, each of which is used to connect vertically between the deck and the bottom plate of the hull, and the inflatable bulkheads are configured to be selectively filled with high-pressure gas. The plurality of inflatable walls include a first inflatable wall (100) in a circular shape, a plurality of second inflatable walls (200) arranged laterally, a plurality of third inflatable walls (300) arranged longitudinally, and a plurality of fourth inflatable walls (400) arranged obliquely, at least the first inflatable wall (100) is used to be arranged directly below the base of the crane.

2. The pressure-bearing capacity adjustable bulkhead structure according to claim 1, characterized in that, The second inflatable bulkhead (200) adopts any of the following connection methods: One end of the second inflatable bulkhead (200) is used to connect to the outer plating of the hull, and the other end is connected to the third inflatable bulkhead (300); The two ends of the second inflatable bulkhead (200) are respectively used to connect with the outer plates on the left and right sides of the hull; The two ends of the second inflatable wall (200) are respectively connected to the two third inflatable walls (300); both ends of the second inflatable wall (200) are connected to the first inflatable wall (100).

3. The pressure-bearing capacity adjustable bulkhead structure according to claim 1, characterized in that, The third inflatable bulkhead (300) is connected in any of the following ways: One end of the third inflatable bulkhead (300) is used to connect with the stern sealing plate of the hull, and the other end is connected with the second inflatable bulkhead (200); The third inflatable bulkhead (300) is connected between the two second inflatable bulkheads (200).

4. The pressure-bearing capacity adjustable bulkhead structure according to claim 1, characterized in that, The fourth inflatable bulkhead (400) is connected in any of the following ways: One end of the fourth inflatable bulkhead (400) is connected to the third inflatable bulkhead (300), and the other end is connected to the first inflatable bulkhead (100); One end of the fourth inflatable bulkhead (400) is connected to the second inflatable bulkhead (200), and the other end is connected to the first inflatable bulkhead (100).

5. The pressure-bearing capacity adjustable bulkhead structure according to any one of claims 2-4, characterized in that, The inflatable bulkhead includes multiple vertical inflatable steel pipes (1) and multiple vertical steel plates (2), and the multiple vertical inflatable steel pipes (1) and multiple vertical steel plates (2) are connected sequentially at intervals along the extension direction of the inflatable bulkhead.

6. The pressure-bearing capacity adjustable bulkhead structure according to claim 5, characterized in that, The inflatable bulkhead also includes a transverse inflatable steel pipe (3), which is connected to each of the vertical inflatable steel pipes (1) and each of the vertical steel plates (2), and the transverse inflatable steel pipe (3) is connected to each of the vertical inflatable steel pipes (1).

7. The pressure-bearing capacity adjustable bulkhead structure according to claim 6, characterized in that, In the two interconnected inflatable chamber walls, the transverse inflatable steel pipes (3) of the two inflatable chamber walls are connected by a steel pipe connector (4).

8. A control method for a bulkhead structure with adjustable pressure bearing capacity, characterized in that, The pressure-bearing capacity adjustable bulkhead structure according to any one of claims 1-7 is implemented, and the control method of the pressure-bearing capacity adjustable bulkhead structure includes: Obtain the crane start command and, before starting the crane, fill each of the inflatable chamber walls with high-pressure gas.

9. The control method for a pressure-bearing capacity adjustable bulkhead structure according to claim 8, characterized in that, The control method for the pressure-bearing capacity adjustable bulkhead structure also includes: When no start command is received from the crane, each of the inflatable chamber walls is made to communicate with the outside atmosphere.

10. A crane vessel, characterized in that, The crane vessel includes the pressure-adjustable bulkhead structure as described in any one of claims 1-7, and further includes a hull and a crane. The pressure-adjustable bulkhead structure is connected between the deck and the bottom plate of the hull, and the pressure-adjustable bulkhead structure is located below the base of the crane.

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