LNG (Liquefied Natural Gas) ship gas collection platform capable of compensating degree of freedom

Abstract

The invention discloses a ship gas collection platform capable of compensating degree of freedom, which is characterized in that a conventional connection mode of direct welding between a gas collection platform and a main deck and between the gas collection platform and a dome deck is changed through a magnetic buffer mechanism, and the situations of structural fatigue and welding corrosion of a welding part between the lower end of the gas collection platform and a ship body in a long-term use process are avoided; the degree of freedom of the gas collection platform in the ship operation process is compensated through the magnetic suction buffer mechanism, the stand column can move in the stand column cylinder, and the stand column can swing through the ball connection mode between the stand column cylinder and the joint base so as to counteract shaking of the gas collection platform due to the fact that stormy waves act on the ship body and the gas collection platform; and adverse effects of stormy waves on use of the gas collection platform are avoided.

Description

TECHNICAL FIELD

[0001] The present application relates to the field of shipbuilding technology, and particularly relates to a LNG ship gas collection platform capable of compensating for degrees of freedom. BACKGROUND

[0002] The gas collection platform of a large LNG ship is one of the core structures of the low-temperature piping system on the ship, and is a key node connecting the low-temperature piping unit on the cargo hold dome deck and the super-long inclined wall pipe. It mainly undertakes three functions of gas collection, pipeline integration and system safety support, is responsible for collecting the natural gas evaporated from the cargo hold, and transports the natural gas to the re-liquefaction device through the pipeline for re-injection into the cargo hold, or directly to the ship main engine fuel supply system.

[0003] Since the pipeline on the gas collection platform continuously flows with ultra-low temperature (-163 DEG C) liquefied natural gas, the structural safety of the gas collection platform itself is crucial to the low-temperature pipeline and even the entire ship. During the long-term operation of the ship, due to the influence of environmental factors, structural fatigue factors and other factors, problems such as welding corrosion may occur at the welding position of the gas collection platform and the ship body. At the same time, whether the ship is sailing in waves or is docked in the port, the ship body itself will be subjected to wave loads, and the gas collection platform rigidly fixed with the ship body structure will also move synchronously with the ship body structure. This movement will have adverse effects on the structural safety of the gas collection platform and the use of the gas collection platform. SUMMARY

[0004] Therefore, the present application provides a ship gas collection platform capable of compensating for degrees of freedom. The magnetic attraction buffering mechanism changes the direct welding connection mode between the gas collection platform and the main deck and the dome deck, so as to avoid structural fatigue and welding corrosion at the welding position of the lower end of the gas collection platform and the ship body during long-term use. The magnetic attraction buffering mechanism compensates for the degrees of freedom of the gas collection platform during the operation of the ship. The stand can move in the stand cylinder, and the stand can swing through the ball connection between the stand cylinder and the joint seat, so as to offset the shaking of the gas collection platform caused by the wind and waves acting on the ship body and the gas collection platform, and avoid the adverse effects of the wind and waves on the use of the gas collection platform.

[0005] A ship gas collection platform capable of compensating for degrees of freedom, comprising a platform, a plurality of stands fixed to the bottom of the platform to support the platform, the lower end of each stand is arranged in the corresponding magnetic attraction buffering mechanism, the magnetic attraction buffering mechanism is adsorbed and fixed on the main deck or the dome deck, The stand can move with the magnetic attraction buffering mechanism to absorb or buffer the dynamic load generated by the movement of the ship body with the wind and waves.

[0006] Preferably, the magnetic attraction buffering mechanism comprises a magnetic attraction buffering assembly and a motion limiting assembly, the magnetic attraction buffering assembly can realize motion in multiple degrees of freedom, and the motion limiting assembly is arranged outside the magnetic attraction buffering assembly to limit the motion amplitude of the magnetic attraction buffering assembly.

[0007] Preferably, the motion limiting assembly comprises a plurality of column limiting blocks arranged outside the magnetic attraction buffering assembly, and the column limiting blocks and the magnetic attraction buffering assembly have gaps for limiting the motion amplitude of the magnetic attraction buffering assembly.

[0008] Preferably, the column limiting blocks are arranged at the front side, the rear side, the left side and the right side of the magnetic attraction buffering assembly respectively.

[0009] Preferably, the magnetic attraction buffering assembly comprises an electromagnetic locking device fixed to the main deck or the dome deck by magnetic attraction, a joint seat fixed to the electromagnetic locking device, and a column cylinder connected to the joint seat by a ball, and the lower end of the column extends into and is limited in the column cylinder.

[0010] Preferably, the column cylinder comprises an open-top cylinder body and a cylinder cover sealing plate fixed to the top of the cylinder body, the bottom of the cylinder body is provided with a universal ball, the inside of the cylinder body is filled with a buffering medium, the central part of the cylinder cover sealing plate is provided with a through hole for the column to pass through, the end of the column extending into the cylinder body is provided with a column bottom plate, and a plurality of overflow holes are arranged in the column bottom plate.

[0011] Preferably, the diameter of the column bottom plate is greater than the hole diameter of the through hole on the cylinder cover sealing plate.

[0012] Preferably, a transverse or oblique column support is further connected between two adjacent columns.

[0013] Preferably, a connecting plate is connected at the connection between each column and the platform.

[0014] The application has the following beneficial effects: The application uses the electromagnetic locking device to fix the gas collection platform to the main deck and the dome deck by magnetic attraction, changes the connection mode that the gas collection platform needs to be directly welded to the main deck and the dome deck in the past, and avoids the structure fatigue and welding corrosion of the welding part between the lower end of the gas collection platform and the ship body in the long-term use process.

[0015] The application can make the column swing synchronously with the column cylinder when the ship body swings with the wind and waves, so as to offset the shaking of the gas collection platform caused by the wind and waves acting on the ship body and the gas collection platform, and avoid the adverse effects of the wind and waves on the use of the gas collection platform. Since the lower end of the column is limited in the column cylinder, the column can move up and down in the column cylinder, and the buffering liquid in the column cylinder can play a buffering role, so as to offset the adverse effects of the ship body fluctuation on the use of the gas collection platform. BRIEF DESCRIPTION OF DRAWINGS

[0016] In order to more clearly illustrate the technical solutions of the embodiments of the present application, the drawings needed to be used in the embodiments will be briefly introduced as follows. Obviously, the drawings in the following description only constitute some embodiments of the present application, and other drawings can also be obtained by those skilled in the art without any creative effort on the basis of these drawings.

[0017] Figure 1 is a structural schematic diagram of the gas collection platform of the present application.

[0018] Figure 2 is a side view of the gas collection platform of the present application.

[0019] Figure 3 is a connection schematic diagram of the column and the column cylinder.

[0020] Figure 4 is a structural schematic diagram of the cylinder cover sealing plate.

[0021] Figure 5 is a structural schematic diagram of the column bottom plate.

[0022] The meanings of the reference numerals in the drawings are as follows: 1 is a ship body, 2 is a column, 3 is a platform, 4 is a main deck, 5 is a column support, 6 is a column limiting block, 7 is a dome deck, 8 is a joint seat, 9 is a column cylinder, 10 is an electromagnetic locking device, 11 is a connecting plate, 12 is a cylinder cover sealing plate, 13 is a column bottom plate, and 14 is an overflow hole. DETAILED DESCRIPTION

[0023] In order to make the objects, technical solutions and advantages of the present application more clear, the present application will be described in detail through specific embodiments shown in the drawings. However, it should be understood that these descriptions are only exemplary and are not intended to limit the scope of the present application. In addition, in the following description, the description of the known structures and technologies is omitted to avoid unnecessary confusion of the concept of the present application.

[0024] The terms used in the present disclosure are only for the purpose of describing specific embodiments and are not intended to limit the present disclosure. The singular forms "a", "an" and "the" used in the present disclosure and the appended claims are also intended to include the plural forms, unless the context clearly indicates otherwise. It should also be understood that the term "and / or" used herein means and includes any or all possible combinations of one or more associated listed items.

[0025] In the description of the present application, it needs to be understood that the terms "longitudinal", "transverse", "upper", "lower", "front", "rear", "left", "right", "vertical", "horizontal", "top", "bottom", "inner", "outer" and the like indicate the orientation or positional relationship shown in the drawings, which are only for the convenience of describing the present application and simplifying the description, and do not indicate or imply that the devices or elements referred to must have a particular orientation, be constructed and operated in a particular orientation, and therefore cannot be understood as a limitation of the present application.

[0026] In the description of the present application, unless otherwise specified and limited, it needs to be explained that the terms "mounting", "connecting", "connecting" should be understood broadly, for example, it can be mechanical connection or electrical connection, it can be the communication inside two elements, it can be direct connection or indirect connection through intermediate medium, and the specific meaning of the above terms can be understood by those skilled in the art according to the specific circumstances.

[0027] In order to better understand the technical solutions of the present application, the present application will be described in detail below in combination with the drawings.

[0028] As shown in Figure 1 , Figure 2 , the present application provides a ship gas collection platform capable of compensating for degrees of freedom, which comprises a platform 3, a column 2 and a magnetic attraction buffering mechanism.

[0029] The platform 3 is horizontally arranged above the main deck 4, and the platform 3 is supported by a plurality of columns 2 to form a gas collection platform, and the platform 3 is provided with gas collection platform equipment.

[0030] The column 2 is arranged on the main deck 4 and the dome deck 7 as needed, wherein the column 2 on the main deck 4 is vertically arranged, and the column 2 on the dome deck 7 is obliquely arranged, but the upper end of each column is welded and fixed with the platform 3 or fixed by bolts and other fasteners, and the lower end is adsorbed and fixed on the corresponding main deck 4 or dome deck 7 by the magnetic attraction buffering mechanism.

[0031] Preferably, in order to ensure the structural stability and structural strength of the gas collection platform composed of the column 2 and the platform 3, a transverse or oblique column brace 5 is further connected between two adjacent columns 2.

[0032] Preferably, a connecting plate 11 is connected at the connection between each column 2 and the platform 3, so as to strengthen the structural stability and structural strength of the gas collection platform.

[0033] The magnetic buffer structure is magnetically fixed to the main deck 4 or the dome deck 7, and can achieve multiple degrees of freedom of movement when the hull rises or sways with the wind and waves. Since the upper end of the column 2 is connected to the magnetic buffer structure, the column 2 can achieve multiple degrees of freedom of movement with the magnetic buffer mechanism to absorb or buffer the dynamic load generated by the movement of the hull 1 with the wind and waves.

[0034] Specifically, the magnetic buffer mechanism includes a magnetic buffer component and a motion limiting component. The magnetic buffer component can achieve multiple degrees of freedom of movement, and the motion limiting component is located on the outside of the magnetic buffer component to limit the range of movement of the magnetic buffer component.

[0035] The magnetic buffer assembly includes an electromagnetic locking device 10, a joint seat 8, and a column cylinder 9. The electromagnetic locking device 10 is magnetically fixed to the main deck 4 or the dome deck 7. The joint seat 8 is welded or fixed to the electromagnetic locking device 10 by fasteners or other means. The column cylinder 9 is ball-connected to the joint seat 8, meaning the joint seat 8 has a spherical groove, and the lower end of the column cylinder 9 has a universal ball. The ball at the lower end of the column cylinder 9 is embedded in the spherical groove of the joint seat 8 and can rotate within the spherical groove. The lower end of the column 2 extends into the column cylinder 9, so that when the column cylinder 9 rotates, the column 2 can rotate synchronously with the column cylinder 9 (i.e., swing in multiple directions) to counteract the dynamic load generated when the hull sways with the wind and waves.

[0036] To prevent the support column 2 from jumping out of the support column cylinder 9 when the hull is tossed about by wind and waves, the support column 2 is confined within the support column cylinder 9. Specifically, the support column cylinder 9 includes a cylindrical body with an open top, filled with a buffer medium. A cylinder cover plate 12 is fixed to the top of the cylinder, and a universal ball is provided at the bottom of the cylinder. The universal ball is embedded in the spherical groove of the joint seat 8 and can rotate within the spherical groove. A through hole is provided in the center of the cylinder cover plate 12 for the support column 2 to pass through. The end of the support column 2 that extends into the cylinder is provided with a support column base plate 13, and multiple overflow holes 14 are provided on the support column base plate 13. In this way, when the hull is tossed about by wind and waves, the support column 2 can move up and down within the support column cylinder 9, and the buffer medium inside the cylinder can play a buffering role, avoiding adverse effects on the use of the gas collection platform. In this embodiment, the buffer medium can be hydraulic oil.

[0037] Preferably, the diameter of the column base plate 13 at the bottom of the column 2 is larger than the diameter of the through hole on the cylinder cover plate 12, so as to ensure that the column and the column cylinder 9 do not separate. The gap between the through hole of the cylinder cover plate 12 and the column 2 can be sealed by a sealing element.

[0038] The electromagnetic locking device 10 is fixed to the main deck 4 or the dome deck 7 by means of electromagnetic attraction.

[0039] The motion limiting component includes multiple column limiting blocks 6 disposed on the outside of the magnetic buffer component. A gap exists between the column limiting blocks 6 and the magnetic buffer component to limit the range of motion of the magnetic buffer component. In this embodiment, the column limiting blocks 6 are respectively disposed on the front, rear, left, and right sides of the column cylinder 9, and a certain gap exists between them and the column cylinder 9 to prevent excessive swaying of the column 2.

[0040] This application utilizes an electromagnetic locking device 10 to adsorb and fix the gas collection platform onto the main deck 4 and the dome deck 7, changing the previous connection method where the gas collection platform needed to be directly welded to the main deck 4 and the dome deck 7. This avoids structural fatigue and welding corrosion at the welded part between the lower end of the gas collection platform and the hull during long-term use.

[0041] Furthermore, through the ball connection between the column tube 9 and the joint seat 8, when the hull sways with the wind and waves, the column 2 can swing synchronously with the column tube 9, thereby offsetting the effect of the wind and waves on the hull and the gas collection platform, which would cause the gas collection platform to sway, and avoiding the adverse effects of the wind and waves on the use of the gas collection platform.

[0042] Meanwhile, since the lower end of the column 2 is confined within the column cylinder 9, the column 2 can move up and down within the column cylinder 9, and the buffer fluid within the column cylinder 9 can act as a buffer, thereby offsetting the adverse effects of hull undulation on the use of the gas collection platform.

[0043] It should be understood that the described embodiments are merely some, not all, of the embodiments of the present invention. All other embodiments obtained by those skilled in the art based on the embodiments of the present invention without inventive effort are within the scope of protection of the present invention.

Claims

1. A compensating-freedom vessel TLP, characterized by, The platform (3) is supported by a plurality of columns (2) fixed at the bottom of the platform (3), the lower end of each column (2) is arranged in the corresponding magnetic attraction buffering mechanism, and the magnetic attraction buffering mechanism is fixed on the main deck (4) or the dome deck (7) by magnetic attraction, The column (2) can move in multiple degrees of freedom with the magnetic attraction buffering mechanism to absorb or buffer the dynamic load generated by the movement of the ship body (1) with wind and waves.

2. The LNG carrier with compensating degrees of freedom of claim 1, characterized in that, The magnetic attraction buffering mechanism comprises a magnetic attraction buffering assembly and a motion limiting assembly, the magnetic attraction buffering assembly can move in multiple degrees of freedom, and the motion limiting assembly is arranged outside the magnetic attraction buffering assembly to limit the movement amplitude of the magnetic attraction buffering assembly.

3. The LNG carrier manifold platform of claim 2, wherein, The motion limiting assembly comprises a plurality of column limiting blocks (6) arranged outside the magnetic attraction buffering assembly, and the column limiting blocks (6) and the magnetic attraction buffering assembly have a gap for limiting the movement amplitude of the magnetic attraction buffering assembly.

4. The LNG carrier with compensating degrees of freedom of claim 3, characterized in that, The column limiting blocks (6) are arranged at the front side, the rear side, the left side and the right side of the magnetic attraction buffering assembly, respectively.

5. The LNG carrier with compensating degrees of freedom of claim 1 or 2, characterized in that, The magnetic attraction buffering assembly comprises an electromagnetic locking device (10) fixed on the main deck (4) or the dome deck (7) by magnetic attraction, a joint seat (8) fixed on the electromagnetic locking device (10), and a column cylinder (9) connected with the joint seat (8) in a ball shape, and the lower end of the column (2) extends into and is limited in the column cylinder (9).

6. The LNG carrier manifold platform of claim 5, wherein, The column cylinder (9) comprises an open-top cylinder body, a cylinder cover sealing plate (12) fixed at the top of the cylinder body, a universal ball arranged at the bottom of the cylinder body, a buffer medium filled in the cylinder body, a perforation arranged in the center of the cylinder cover sealing plate (12) and used for the column (2) to pass through, a column bottom plate (13) arranged at the end of the column (2) extending into the cylinder body, and a plurality of overflow holes (14) arranged on the column bottom plate (13).

7. The LNG carrier manifold platform of claim 6, wherein, The diameter of the column bottom plate (13) is greater than the hole diameter of the perforation on the cylinder cover sealing plate (12).

8. The LNG carrier with compensating degrees of freedom of claim 1, characterized in that, A transverse or inclined column support (5) is further connected between two adjacent columns (2).

9. The LNG carrier with compensating degrees of freedom of claim 1, characterized in that, A connecting plate (11) is connected at the connection between each column (2) and the platform (3).

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