Sea chest plugging device and offshore operation equipment

Abstract

The invention relates to a sea chest plugging device and offshore operation equipment, and the sea chest plugging device comprises a grating coaming assembly which comprises a coaming arranged at the edge of a sea chest opening; the cover plate main body is detachably arranged at the top opening of the surrounding plate; the positioning frame is fixedly connected to the surface of one side of the cover plate main body; the buoyancy module is embedded in the positioning frame; one end of the fastening assembly is connected with the cover plate body, and the other end of the fastening assembly is connected with the surrounding plate. Through cooperative arrangement of all the components, effective plugging of the sea chest opening is achieved, the effective sealing performance, stability and reliability are improved, the structure of the sea chest plugging device is simplified, the self weight is reduced, and the operation difficulty of operators is reduced.

Description

Technical Field

[0001] The present application relates to the technical field of marine oil and gas production equipment, and in particular to a seabed door sealing device and offshore operation equipment. Background Art

[0002] With the rapid development of offshore oil and gas production equipment and deep-sea engineering technology, in order to meet the needs of offshore floating facilities such as FPSO and FLNG for seawater isolation in long-term underwater operation and maintenance, the submarine door plugging cover technology has gradually emerged. This technology replaces the traditional plugging blanket with a rigid sealing structure, aiming to achieve long-term and stable seawater plugging and reduce frequent maintenance costs.

[0003] In the related technologies, the plugging problem is solved in two main ways: the traditional plugging blanket relies on flexible materials to temporarily cover the seabed door, but its sealing effect is easily affected by water flow impact and marine biological erosion, and cannot meet the long-term operation and maintenance needs. The traditional seabed door plugging cover adopts a steel welding or bolt fixing structure, which relies on lifting equipment for hoisting and achieves sealing by increasing its own weight.

[0004] However, traditional plugging blankets need to be replaced frequently due to problems such as material aging and sealing failure, with high operation and maintenance costs and poor reliability. Traditional plugging covers are made of steel, which makes them heavy and difficult to operate underwater. They rely heavily on large lifting equipment, and their structural strength is insufficient and easily deformed, resulting in sealing failure. Existing plugging devices lack buoyancy balance design, and divers need to bear additional operating loads, increasing the risk of operational accidents. The fastening system design is backward. For example, the perforated eye plate is difficult to align, the bolts are easily attached by marine organisms, and the disassembly and assembly efficiency is low.

[0005] In summary, traditional submarine door sealing devices cannot achieve the requirements of lightweight, high strength, long-term reliable sealing and low-risk operation. Summary of the invention

[0006] Based on this, it is necessary to provide a seabed door sealing device and offshore operation equipment to address the problems of heavy weight and complex structure of traditional seabed door sealing devices.

[0007] A subsea door blocking device, comprising:

[0008] A grille coaming assembly, comprising a coaming for being arranged at an edge of a seabed door opening;

[0009] A cover plate body is detachably arranged at the top opening of the enclosure plate;

[0010] A positioning frame, fixedly connected to a surface of one side of the cover plate body;

[0011] A buoyancy module is embedded in the positioning frame;

[0012] A fastening assembly has one end connected to the cover plate body and the other end connected to the enclosure plate.

[0013] In one embodiment, an installation chamber is provided inside the positioning frame; further comprising a fixing component, the fixing component is fixed on the top of the positioning frame, and presses the buoyancy module in the installation chamber.

[0014] In one embodiment, the fixing component includes a pressure strip, the pressure strip extends along the width direction of the positioning frame; at least one side of the positioning frame is provided with a connecting ear plate extending outwards, and one end of the pressure strip is fixedly connected to the connecting ear plate through a connecting piece.

[0015] In one embodiment, the positioning frame includes an installation chamber formed by the perpendicular intersection of transverse reinforcing ribs and longitudinal reinforcing ribs;

[0016] Further comprising an inclined support plate, one end of the inclined support plate is connected to the transverse reinforcing rib, and the other end is connected to the surface of the cover plate body obliquely arranged.

[0017] In one embodiment, further comprising an upper fixing seat arranged at the edge of the cover plate body and a lower fixing seat correspondingly arranged outside the surrounding plate and below the upper fixing seat; one end of the fastening component is clamped to the lower fixing seat, and the other end penetrates and is connected to the upper fixing seat.

[0018] In one embodiment, the upper fixing seat extends horizontally, and a bolt hole is opened at the extending end of the upper fixing seat;

[0019] The lower fixing seat is arranged in parallel with the upper fixing seat, and an arc-shaped guiding groove is opened at the bottom of the extending end of the lower fixing seat;

[0020] The fastening component includes a T-shaped bolt, the head of which is embedded in the arc-shaped guiding groove, and the screw part passes through the bolt hole and is locked by a nut.

[0021] In one embodiment, a flanging structure extending downwards is provided at the edge of the cover plate body;

[0022] Further comprising a sealing member, the sealing member is arranged circumferentially along the inner side of the flanging structure and is arranged at an interval from the flanging structure to form an annular sealing groove; one end of the surrounding plate of the cover plate body is embedded in the sealing groove.

[0023] In one embodiment, the buoyancy module is formed by composite foaming of an epoxy resin matrix and hollow glass microspheres.

[0024] In one embodiment, the grille surrounding plate assembly further includes a grille, the grille is arranged inside the surrounding plate and is fixedly connected to the inner wall of the surrounding plate.

[0025] The above-mentioned sea chest plugging device realizes the effective plugging of the sea chest opening through the collaborative setting of each component, improves the effective sealing performance, stability and reliability, simplifies the structure of the sea chest plugging device, reduces its own weight, and reduces the operation difficulty of the operator.

[0026] According to another object of the present invention, there is also provided an offshore operation device, including the above-mentioned sea chest plugging device;

[0027] The offshore operation device includes a hull structure, and the sea chest plugging device is detachably installed at the sea chest opening of the hull structure.

[0028] The above-mentioned offshore operation device realizes the plugging of the sea chest by installing the sea chest plugging device at the sea chest opening of the hull structure, and has high stability and reliability. BRIEF DESCRIPTION OF THE DRAWINGS

[0029] Figure 1 It is a top view schematic diagram of the sea chest plugging device.

[0030] Figure 2 It is a side sectional view of the sea chest plugging device.

[0031] Figure 3 It is a top view schematic diagram of the grid enclosure assembly.

[0032] Figure 4 It is a side sectional view of the grid enclosure assembly.

[0033] Figure 5 It is a top view schematic diagram of the cover plate body.

[0034] Figure 6 It is a side sectional view of the cover plate body.

[0035] In the figures: 10, grid enclosure assembly; 11, enclosure; 12, lower fixing seat; 121, arc-shaped guide groove; 13, grid;

[0036] 20, cover plate body; 21, upper fixing seat; 211, bolt hole; 22, seal; 23, seal groove;

[0037] 30, positioning frame; 31, installation chamber; 32, connecting ear plate; 33, transverse reinforcing rib; 34, longitudinal reinforcing rib; 35, inclined support plate;

[0038] 40, buoyancy module;

[0039] 50, fastening assembly; 51, T-shaped bolt; 52, nut;

[0040] 60, fixing assembly; 61, pressing strip;

[0041] 70, handle;

[0042] 100. Sea suction valve Detailed implementation manners

[0043] To make the above objects, features, and advantages of the present application more apparent and understandable, the following will describe in detail the specific implementation manners of the present application with reference to the accompanying drawings. Many specific details are set forth in the following description to facilitate a full understanding of the present application. However, the present application can be implemented in many other ways different from those described herein, and those skilled in the art can make similar improvements without departing from the connotation of the present application. Therefore, the present application is not limited by the specific embodiments disclosed below.

[0044] In the description of the present application, it should be understood that if terms such as "center", "longitudinal", "transverse", "length", "width", "thickness", "upper", "lower", "front", "rear", "left", "right", "vertical", "horizontal", "top", "bottom", "inner", "outer", "clockwise", "counterclockwise", "axial", "radial", "circumferential", etc. appear, the orientation or positional relationship indicated by these terms is based on the orientation or positional relationship shown in the drawings, and is only for the convenience of describing the present application and simplifying the description, rather than indicating or implying that the device or element referred to must have a specific orientation, be constructed and operated in a specific orientation, and therefore cannot be understood as a limitation of the present application.

[0045] In addition, if terms such as "first" and "second" appear, these terms are only used for descriptive purposes and cannot be understood as indicating or implying relative importance or implicitly specifying the quantity of the indicated technical features. Thus, features defined with "first" and "second" may explicitly or implicitly include at least one of such features. In the description of the present application, if the term "plural" appears, the meaning of "plural" is at least two, such as two, three, etc., unless otherwise specifically and clearly defined.

[0046] In the present application, unless otherwise clearly defined and limited, if terms such as "install", "connect", "join", "fix", etc. appear, these terms should be understood in a broad sense. For example, it can be a fixed connection, a detachable connection, or integrated; it can be a mechanical connection or an electrical connection; it can be directly connected or indirectly connected through an intermediate medium, and it can be the communication inside two elements or the interaction relationship between two elements, unless otherwise clearly limited. For those of ordinary skill in the art, the specific meanings of the above terms in the present application can be understood according to specific circumstances.

[0047] In this application, unless otherwise clearly specified and defined, when a first feature is described as being "on" or "under" a second feature or the like, it may mean that the first and second features are in direct contact, or the first and second features are in indirect contact through an intermediate medium. Moreover, the first feature being "above", "over" and "on top of" the second feature may mean that the first feature is directly above or obliquely above the second feature, or simply indicates that the first feature has a higher horizontal height than the second feature. The first feature being "under", "beneath" and "underneath" the second feature may be that the first feature is directly below or obliquely below the second feature, or simply indicates that the first feature has a lower horizontal height than the second feature.

[0048] It should be noted that if an element is referred to as being "fixed to" or "disposed on" another element, it can be directly on the other element or there can also be an intermediate element. If an element is considered to be "connected" to another element, it can be directly connected to the other element or there may be an intermediate element at the same time. If any, the terms "vertical", "horizontal", "up", "down", "left", "right" and similar expressions used in this application are only for the purpose of illustration and do not represent the only implementation.

[0049] Refer to Figure 1 and Figure 2 , Figure 1 is a top view schematic diagram of the sea chest 100 blocking device in an embodiment of this application. Figure 2 is a side cross-sectional view of the sea chest 100 blocking device in an embodiment of this application.

[0050] A sea chest 100 blocking device provided by an embodiment of this application includes a grille enclosure assembly 10, a cover plate main body 20, a positioning frame 30, a buoyancy module 40 and a fastening assembly 50.

[0051] Specifically, the grille enclosure assembly 10 includes an enclosure 11 which is used to be arranged at the opening edge of the sea chest 100. The cover plate main body 20 is detachably arranged at the top opening of the enclosure 11. The positioning frame 30 is fixedly connected to one side surface of the cover plate main body 20. The buoyancy module 40 is embedded in the positioning frame 30. One end of the fastening assembly 50 is connected to the cover plate main body 20, and the other end is connected to the enclosure 11.

[0052] The grille enclosure assembly 10 includes an enclosure 11 and grilles 13. The enclosure 11 is fixed to the edge of the opening of the sea chest 100 of the ship by means of bolts, welding, etc., forming a stable frame structure to provide support for the subsequent installation of the cover plate main body 20. Inside the enclosure 11, a plurality of grille 13 structures are evenly distributed. The function of the grille 13 structure is to prevent larger sundries or marine organisms from entering the inside of the sea chest 100, and at the same time ensure the normal passage of water flow to reduce the impact on the water flow.

[0053] The cover plate main body 20 is detachably arranged at the opening on the top of the surrounding plate 11, that is, the cover plate main body 20 is arranged on the side of the surrounding plate 11 away from the sea bottom door 100, and is used to block the opening on the top of the surrounding plate 11. A sealing structure is provided at the edge of the cover plate main body 20. When the cover plate main body 20 is fixed to the surrounding plate 11 through the fastening assembly 50, the sealing structure is in close contact with the top edge of the surrounding plate 11, improving the sealing performance between the cover plate main body 20 and the surrounding plate 11.

[0054] The positioning frame 30 is fixed on one side surface of the cover plate main body 20 by welding or bolt connection. The buoyancy module 40 is made of solid buoyancy material and has good buoyancy performance. The shape of the buoyancy module 40 matches the installation space in the positioning frame 30 and can be tightly embedded in the positioning frame 30. The modular buoyancy is matched with the positioning frame 30 to ensure the buoyancy effect and, at the same time, serves as a strengthening structure of the cover plate main body 20, improving the overall strength of the sea bottom door 100 blocking device.

[0055] One end of the fastening assembly 50 is connected to the cover plate main body 20, and the other end is connected to the surrounding plate 11. The fastening assembly 50 is used to block the opening at the top of the surrounding plate 11 by the cover plate main body 20. A handle 70 is arranged on the cover plate main body 20. When it is necessary to open the sea bottom door 100, only need to loosen the fastening assembly 50 and pull the handle 70, then the cover plate main body 20 can be separated from the surrounding plate 11, thus opening the opening of the sea bottom door 100.

[0056] In the specific implementation process, by arranging the surrounding plate 11 at the edge of the opening of the sea bottom door 100 and fixing the cover plate main body 20 to the top opening of the surrounding plate 11 through the fastening assembly 50, the sealing effect of the cover plate main body 20 on the opening of the sea bottom door 100 is realized. The positioning frame 30 is fixed on the surface of the cover plate main body 20 away from the surrounding plate 11, and the buoyancy module 40 is installed in the positioning frame 30 to achieve a good buoyancy effect, realizing an approximate balance between buoyancy and gravity, reducing the operation difficulty of blocking the sea bottom door 100 and reducing the safety risk of the operator. The modular buoyancy unit is adopted. When the buoyancy module 40 is damaged, it is convenient to disassemble, repair or replace, improving the operation efficiency.

[0057] As above, the above-mentioned sea bottom door 100 blocking device realizes the effective blocking of the opening of the sea bottom door 100 through the coordinated setting of each component, improves the effective sealing performance, stability and reliability, simplifies the structure of the sea bottom door 100 blocking device, reduces the self-weight and reduces the operation difficulty of the operator.

[0058] In one embodiment, the shroud 11 is made of a high-strength and corrosion-resistant metal material, such as aluminum alloy, titanium alloy, or stainless steel. Preferably, the shroud 11 is made of aluminum alloy material, which reduces the weight of the shroud 11 while ensuring the structural strength of the shroud 11 and reducing the self-weight of the sea chest 100 blocking device.

[0059] The shroud 11 has a square frame structure. A plurality of spaced-apart grille bars 13 are provided inside the shroud 11, and the grille bars 13 match the opening size of the sea chest 100. A plurality of outwardly extending flange edges are provided at the contact position between the shroud 11 and the sea chest 100, and bolt holes 211 are provided on the flange edges. The shroud 11 is fixedly connected to the sea chest 100 by bolts. The shape and size of the shroud 11 are adaptively adjusted according to the actual shape and size of the opening of the sea chest 100.

[0060] In one embodiment, the cover body 20 is made of a high-strength and corrosion-resistant material similar to that of the shroud 11. Preferably, the cover body 20 is made of aluminum alloy material to ensure the long-term stability of the cover body 20 in the marine environment and effectively reduce the overall weight of the sea chest 100 blocking device.

[0061] The cover body 20 has a square structure, and the shape and size of the cover body 20 match the top opening of the shroud 11, and can completely cover the top opening of the shroud 11.

[0062] In one embodiment, the positioning frame 30 is made of a lightweight and high-strength alloy material, such as aluminum alloy. The shape of the positioning frame 30 is a square structure or is adjusted according to the shape of the cover body 20, and is fixedly connected to one side surface of the cover body 20.

[0063] The buoyancy module 40 is made of a lightweight and high-strength solid material, such as being formed by compound foaming of an epoxy resin matrix material and hollow glass microspheres. It has excellent buoyancy and corrosion resistance, and has better stability and durability compared with traditional liquid buoyancy materials, and there will be no leakage and pollution problems. At the same time, the buoyancy module 40 made of this material has better specific strength and specific stiffness, compensates for the strength of the cover body 20 made of aluminum alloy material, and can provide better support and protection for the cover body 20.

[0064] A snap structure or a limit connection structure may be provided between the buoyancy module 40 and the positioning frame 30 to prevent the offset or displacement of the buoyancy module 40 and ensure the buoyancy performance and stability of the buoyancy module 40.

[0065] Combined Figure 5 、 Figure 6 shown, Figure 5 is a top view schematic diagram of the cover body 20 provided in an embodiment of the present application. Figure 6This is a side cross-sectional view of the cover body 20 provided in an embodiment of the present application. In some embodiments, an installation chamber 31 is provided inside the positioning frame 30, and the buoyancy module 40 is fixed in the installation chamber 31 to achieve the buoyancy effect. The depth of the installation chamber 31 is slightly greater than the height of the buoyancy module 40 to ensure that the buoyancy module 40 can be completely embedded therein, while leaving a certain gap to facilitate the adjustment and positioning of the buoyancy module 40 during the installation process.

[0066] Multiple installation chambers 31 can be provided inside the positioning frame 30, and multiple buoyancy modules 40 are respectively arranged in the multiple installation chambers 31. When some of the buoyancy modules 40 are damaged, the damaged buoyancy module 40 can be separately disassembled, repaired or replaced, while not affecting the buoyancy effect of other buoyancy modules 40, ensuring the normal use of the seacock 100 blocking device.

[0067] In one of the embodiments, the seacock 100 blocking device further includes a fixing component 60, and the fixing component 60 is fixed on the top of the positioning frame 30 to press the buoyancy module 40 in the installation chamber 31.

[0068] Specifically, the buoyancy module 40 is installed in the installation chamber 31 of the positioning frame 30, and the fixing component 60 is arranged on the top of the positioning frame 30 to press against the buoyancy module 40, fix the buoyancy module 40 in the installation chamber 31 to achieve the buoyancy effect, and at the same time limit the buoyancy module 40 to improve the stability.

[0069] In one of the embodiments, the fixing component 60 includes a horizontally arranged pressing strip 61, and the pressing strip 61 extends along the width direction of the positioning frame 30.

[0070] Specifically, the buoyancy module 40 is arranged in the installation chamber 31 of the positioning frame 30, the pressing strip 61 is arranged on the top of the positioning frame 30 and extends along the width direction of the positioning frame 30, and is used to cover the buoyancy module 40 to achieve the limiting effect on the buoyancy module 40. The pressing strip 61 is in a strip-shaped structure, and the material of the pressing strip 61 is selected as a high-strength and corrosion-resistant metal material, such as stainless steel or aluminum alloy, etc., to ensure its long-term stability and reliability in the marine environment. The width and thickness of the pressing strip 61 are adjusted according to the size of the buoyancy module 40 and the structure of the positioning frame 30.

[0071] Multiple installation chambers 31 are provided inside the positioning frame 30, multiple buoyancy modules 40 are respectively arranged in the multiple installation chambers 31, and multiple pressing strips 61 are respectively arranged on the top of the positioning frame 30 to press the buoyancy module 40 and improve the reliability of the buoyancy module 40.

[0072] In one of the embodiments, at least one side of the positioning frame 30 is provided with a connecting ear plate 32 extending outwards, and one end of the pressing strip 61 is fixedly connected to the connecting ear plate 32 through a connecting piece.

[0073] Specifically, connection lugs 32 are provided outside the side edges of the positioning frame 30, and the connection lugs 32 extend in a direction away from the positioning frame 30. The pressure strip 61 is integrally disposed on the top of the positioning frame 30. The connection lugs 32 are located below the pressure strip 61. A connection hole is provided at the extending end of the connection lugs 32. One end of the pressure strip 61 that extends and protrudes from the positioning frame 30 is fixedly connected to the connection hole of the connection lugs 32 through connecting members such as bolts and buckles, so as to fix the position of the pressure strip 61.

[0074] Connection lugs 32 extending outward are provided on one side edge of the positioning frame 30, and connection lugs 32 extending outward are also provided on the opposite side edge of the positioning frame 30. The extending directions of the two connection lugs 32 are opposite. The pressure strip 61 is integrally disposed on the top of the positioning frame 30. The two ends of the pressure strip 61 that protrude from the positioning frame 30 are respectively detachably connected to the two connection lugs 32 through connecting members such as bolts and buckles. When the pressure strip 61 is damaged, the pressure strip 61 can be disassembled for repair or replacement, reducing the difficulty of repair.

[0075] Combined Figure 5 as shown Figure 5 is a top view schematic diagram of the cover body 20 provided in an embodiment of the present application. In some embodiments, the positioning frame 30 includes an installation cavity 31 formed by the perpendicular intersection of a transverse reinforcing rib 33 and a longitudinal reinforcing rib 34.

[0076] Specifically, the positioning frame 30 is a square frame structure, and its interior includes an installation cavity 31 formed by the perpendicular intersection of a transverse reinforcing rib 33 and a longitudinal reinforcing rib 34. Taking the top view angle in the figure as the front view angle, the transverse reinforcing rib 33 is arranged along the length direction of the positioning frame 30, and the longitudinal reinforcing rib 34 is arranged along the width direction of the positioning frame 30, and is perpendicularly and cross-connected to the transverse reinforcing rib 33 to form a plurality of independent installation cavities 31, which are respectively used for installing the buoyancy module 40.

[0077] In this embodiment, the positioning frame 30 includes two transverse reinforcing ribs 33 and three longitudinal reinforcing ribs 34 that are perpendicularly and cross-arranged to form two installation cavities 31. Among them, the cross-sectional shapes of the transverse reinforcing rib 33 and the longitudinal reinforcing rib 34 can be rectangular or I-shaped to increase the bending strength.

[0078] In this embodiment, the transverse reinforcing rib 33 and the longitudinal reinforcing rib 34 are connected by welding or riveting, or the transverse reinforcing rib 33, the longitudinal reinforcing rib 34 and the positioning frame 30 are integrally formed. Both the transverse reinforcing rib 33 and the longitudinal reinforcing rib 34 are made of high-strength and corrosion-resistant metal materials, such as stainless steel or aluminum alloy, to ensure their long-term stability and load-bearing capacity in the marine environment.

[0079] In one embodiment, the positioning frame 30 further includes an inclined support plate 35. One end of the inclined support plate 35 is connected to the transverse reinforcing rib 33, and the other end is inclined and disposed on the surface of the cover body 20.

[0080] Specifically, one end of the inclined support plate 35 is connected to the transverse reinforcing rib 33 by welding or bolt connection, and the connection position can be selected at the middle or end of the transverse reinforcing rib 33 according to the actual situation. The other end of the inclined support plate 35 is inclined and disposed on the surface of the cover body 20, forming a certain angle with the surface of the cover body 20. The connection between the inclined support plate 35 and the cover body 20 can be achieved by welding, bolt connection or bonding, etc.

[0081] When the submarine door 100 blocking device is subjected to external pressure or seawater impact, the inclined support plate 35 can bear part of the pressure and transfer the pressure to the positioning frame 30 and the cover body 20, enabling each component to share the pressure jointly and avoiding structural damage caused by excessive local stress. At the same time, the setting of the inclined support plate 35 can also prevent the positioning frame 30 from shifting or deforming during installation and use, ensuring that the buoyancy module 40 is always in the correct position and ensuring the normal operation of the device.

[0082] As described above, through the setting of the positioning frame 30 and the inclined support plate 35, higher structural stability and reliability are achieved. The installation chamber 31 of the positioning frame 30 can effectively fix the buoyancy module 40, ensuring the stable performance of the buoyancy module 40; the inclined support plate 35 strengthens the connection between the cover body 20 and the positioning frame 30, improving the overall load-bearing capacity of the device.

[0083] Combined with Figure 3 、 Figure 4 shown, Figure 3 is a top view schematic diagram of the grille enclosure assembly 10 provided in an embodiment of the present application. Figure 4 is a side cross-sectional view of the grille enclosure assembly 10 provided in an embodiment of the present application. In some embodiments, it further includes an upper fixing seat 21 provided at the edge of the cover body 20 and a lower fixing seat 12 correspondingly provided outside the enclosure 11 and below the upper fixing seat 21; one end of the fastening assembly 50 is snapped onto the lower fixing seat 12, and the other end passes through and is connected to the upper fixing seat 21.

[0084] Specifically, the upper fixing seat 21 is arranged at the edge of the cover plate main body 20. One end of the upper fixing seat 21 is arranged on the surface of the cover plate main body 20, and the other end is used to connect with the lower fixing seat 12 of the surrounding plate 11. The lower fixing seat 12 is arranged outside the surrounding plate 11, below the upper fixing seat 21, and there is a spacing between them. One end of the lower fixing seat 12 is arranged on the outer wall of the side of the surrounding plate 11, and the other end is connected with the upper fixing seat 21 through the fastening component 50. Wherein, one end of the fastening component 50 is clamped in the lower fixing seat 12, and the other end penetrates upward through one end of the upper fixing seat 21 away from the cover plate main body 20 and is fixedly connected thereto.

[0085] In one embodiment, the upper fixing seat 21 extends horizontally, and a bolt hole 211 is provided at the extending end of the upper fixing seat 21; the lower fixing seat 12 is arranged in parallel with the upper fixing seat 21, and an arc-shaped guiding groove 121 is provided at the bottom of the extending end of the lower fixing seat 12.

[0086] Specifically, the upper fixing seat 21 extends horizontally and is arranged at the edge of the cover plate main body 20. A bolt hole 211 is provided at the extending end of the upper fixing seat 21 for connecting with the fastening component 50. One end of the upper fixing seat 21 is fixed on the cover plate main body 20 by welding or bolt connection to ensure that it can bear the tension during the fastening process.

[0087] The lower fixing seat 12 is arranged in parallel with the upper fixing seat 21, correspondingly installed outside the surrounding plate 11 and below the upper fixing seat 21. An arc-shaped guiding groove 121 is provided at the bottom of the extending end of the lower fixing seat 12. The design of the arc-shaped guiding groove 121 facilitates the installation and adjustment of the fastening component 50, so that the fastening component 50 can be smoothly aligned with the bolt hole 211 during the installation process. One end of the lower fixing seat 12 is fixed on the surrounding plate 11 by welding or bolt connection.

[0088] The fastening component 50 includes a T-shaped bolt 51, the head of which is embedded in the arc-shaped guiding groove 121, and the screw part thereof passes through the bolt hole 211 and is locked by a nut 52.

[0089] Specifically, the head of the T-shaped bolt 51 is embedded in the arc-shaped guiding groove 121, and the screw part passes through the bolt hole 211 of the upper fixing seat 21. The head of the T-shaped bolt 51 can slide smoothly along the guiding groove during installation, which is convenient for adjusting the position. After the screw part of the T-shaped bolt 51 passes through the bolt hole 211, it is locked by the nut 52. Use a torque wrench to tighten the nut 52 according to the specified torque value to ensure the reliable connection between the cover plate main body 20 and the surrounding plate 11 and form a good sealing effect.

[0090] In one embodiment, a flanging structure extending downward is provided at the edge of the cover plate main body 20. The sealing member 22 is arranged circumferentially along the inner side of the flanging structure and is spaced from the flanging structure to form an annular sealing groove 23; one end of the surrounding plate 11 of the cover plate main body 20 is embedded in the sealing groove 23.

[0091] Specifically, the flanging structure increases the contact area between the cover plate body 20 and the surrounding plate 11, improving the connection stability and sealing performance. The seal 22 is circumferentially arranged along the inner side of the flanging structure, and the material is selected from materials with good elasticity and sealing performance such as rubber. The seal 22 is arranged at an interval from the flanging structure to form an annular seal groove 23, and one end of the top of the surrounding plate 11 is embedded in the seal groove 23. When the cover plate body 20 is connected to the surrounding plate 11, the seal 22 is compressed to form a tight seal to prevent seawater leakage.

[0092] In this embodiment, there is also provided an offshore operation device, including the bottom door 100 blocking device as described above. The offshore operation device can be various types of ships, offshore platforms, etc., and a bottom door 100 is provided on its hull structure. The bottom door 100 blocking device is detachably installed at the opening of the bottom door 100 of the hull structure to achieve the blocking of the bottom door 100 and ensure the safety of the offshore operation device. Through the coordinated action of the positioning frame 30, the buoyancy module 40, the inclined support plate 35, and the upper fixing seat 21, the lower fixing seat 12 and the fastening assembly 50, the bottom door 100 blocking device has high structural stability and reliability, can withstand a certain amount of external pressure and impact, and ensure the blocking effect.

[0093] The technical features of the above embodiments can be combined arbitrarily. For the sake of brevity of description, not all possible combinations of the technical features in the above embodiments are described. However, as long as there is no contradiction in the combination of these technical features, it should be considered as the scope recorded in this specification.

[0094] The above embodiments only represent several implementation manners of the present application, and their descriptions are relatively specific and detailed, but they should not be construed as limiting the scope of the patent application. It should be noted that for those of ordinary skill in the art, without departing from the concept of the present application, several deformations and improvements can still be made, and these all belong to the protection scope of the present application. Therefore, the protection scope of the patent of the present application should be subject to the appended claims.

Claims

1. A submarine door blocking device, characterized in that: include: A grille enclosure assembly (10) comprises an enclosure (11) for being arranged at an opening edge of a seabed door (100); A cover plate body (20) is detachably arranged at the top opening of the enclosure plate (11); A positioning frame (30) fixedly connected to a side surface of the cover plate body (20); A buoyancy module (40) is embedded in the positioning frame (30); A fastening assembly (50) has one end connected to the cover plate body (20) and the other end connected to the enclosure plate (11).

2. The submarine door blocking device according to claim 1, characterized in that: The positioning frame (30) is provided with an installation chamber (31) therein; and further comprises a fixing assembly (60), wherein the fixing assembly (60) is fixed to the top of the positioning frame (30) to press the buoyancy module (40) tightly into the installation chamber (31).

3. The submarine door blocking device according to claim 2, characterized in that: The fixing assembly (60) comprises a pressure strip (61), and the pressure strip (61) extends along the width direction of the positioning frame (30); at least one side of the positioning frame (30) is provided with a connecting ear plate (32) extending outward, and one end of the pressure strip (61) is fixedly connected to the connecting ear plate (32) via a connecting piece.

4. The submarine door blocking device according to claim 2, characterized in that: The positioning frame (30) comprises an installation chamber (31) formed by transverse reinforcing ribs (33) and longitudinal reinforcing ribs (34) perpendicularly intersecting each other; It also includes an oblique support plate (35), one end of which is connected to the transverse reinforcing rib (33), and the other end of which is connected to the surface of the cover plate body (20) and is inclined.

5. The submarine door blocking device according to claim 4, characterized in that: It also includes an upper fixing seat (21) arranged at the edge of the cover plate body (20) and a lower fixing seat (12) correspondingly arranged on the outside of the enclosure (11) and located below the upper fixing seat (21); one end of the fastening assembly (50) is clamped on the lower fixing seat (12), and the other end is connected to the upper fixing seat (21).

6. The submarine door blocking device according to claim 5, characterized in that: The upper fixing seat (21) extends transversely, and a bolt hole (211) is provided at the extended end of the upper fixing seat (21); The lower fixing seat (12) is arranged in parallel with the upper fixing seat (21), and an arc-shaped guide groove (121) is provided at the bottom of the extended end of the lower fixing seat (12); The fastening assembly (50) comprises a T-shaped bolt (51), the head of which is embedded in the arc-shaped guide groove (121), and the screw portion of which passes through the bolt hole (211) and is locked by a nut (52).

7. The seabed door blocking device according to any one of claims 1 to 6, characterized in that: The edge of the cover plate body (20) is provided with a flange structure extending downward; It also includes a sealing member (22), which is arranged along the inner circumference of the flange structure and is spaced apart from the flange structure to form an annular sealing groove (23); one end of the cover plate body (20) of the enclosure plate (11) is embedded in the sealing groove (23).

8. The seabed door blocking device according to any one of claims 1 to 6, characterized in that: The buoyancy module (40) is formed by composite foaming of an epoxy resin matrix and hollow glass microspheres.

9. The seabed door blocking device according to any one of claims 1 to 6, characterized in that: The grille enclosure assembly (10) further comprises a grille (13), wherein the grille (13) is arranged in the enclosure (11) and is fixedly connected to the inner wall of the enclosure (11).

10. An offshore operation equipment, characterized in that: Comprising a seabed door blocking device as described in any one of claims 1 to 9; The offshore operation equipment comprises a hull structure, and the seabed door blocking device is detachably mounted at an opening of a seabed door (100) of the hull structure.

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