Pump tower base of a low-temperature liquid cargo storage tank

Abstract

An embodiment of the present invention provides a pump tower base for a low-temperature liquid cargo storage tank, which is used to define the position of the pump tower and includes: a cylinder body, the lower part of which is fixedly connected to the bottom wall of the low-temperature liquid cargo storage tank, symmetrically arranged support piles are provided in the middle of the cylinder body, and a connecting apron is provided on the outside of the upper part; a top block, one side of which is connected to the connecting apron, and the other side is fixedly connected to the pump tower bottom plate of the pump tower through a connecting piece, and there are multiple top blocks which are symmetrically arranged about the central line in the vertical direction of the cylinder body; when performing position limitation, the connecting apron is made to pass upward through a limiting hole opened at the center of the pump tower bottom plate and having a shape adapted to the shape of the frame structure formed by connecting the connecting aprons in sequence, one side of the top block is fixedly connected to the pump tower bottom plate through a fixed connecting piece, and the other side of the top block is used to fix the connecting apron that has passed upward through the pump tower bottom plate, and the distance between the frame structure formed by connecting the connecting aprons in sequence and the inner side edge of the limiting hole is not greater than 150 mm.

Description

Technical Field

[0001] The present invention relates to the technical field of equipment for transporting and storing cryogenic liquid cargo, and particularly to a pump tower base for a cryogenic liquid cargo storage tank. Background Art

[0002] When transporting gases such as natural gas and ethane gas, for more economical long-distance transportation, the gas is usually cooled to a low temperature and the liquefied gas is transported. After liquefaction, the volume of the gas is greatly reduced, and the transportation cost is reduced. The liquefied cryogenic liquid is stored and transported in a special cryogenic storage tank, and a pump tower is arranged inside the storage tank as a passage for the cryogenic liquid to enter and exit the storage tank.

[0003] Generally, the upper end of the pump tower is fixed to the top of the storage tank, and the lower end is fixed to the pump tower base. Since the pump tower is immersed in the cryogenic liquid for a long time, it will expand and contract due to the temperature change of the storage tank during the loading and unloading states and the maintenance state; and the dimension of the pump tower in the height direction is significantly larger than the lateral and longitudinal dimensions. Therefore, the thermal expansion and contraction of the pump tower in the height direction is more obvious. To avoid excessive temperature stress, a fixed connection method cannot be adopted between the pump tower base and the pump tower. The pump tower base needs to release the displacement of the pump tower in the vertical direction and only limit the displacement of the pump tower in the horizontal direction.

[0004] The pump tower base of the prior art is arranged below the pump tower bottom plate, and support members are welded below the pump tower bottom plate. The pump tower base and the support members of the pump tower bottom plate are fixed through special connecting gussets.

[0005] However, the pump tower base of the prior art has the following problems:

[0006] 1) The gap between the pump tower bottom plate and the bottom of the storage tank is only about 600 mm, and it is very inconvenient to install the pump tower base in such a narrow space;

[0007] 2) The support members below the pump tower bottom plate are arranged in a rectangular frame, and the pump tower base must be embedded therein, which requires very high installation accuracy and is not conducive to on-site construction;

[0008] 3) The connecting gussets between the pump tower base and the support members are complex and diverse, and the installation accuracy requirements are high, which is not conducive to on-site construction. Summary of the Invention

[0009] In view of the above problems existing in the prior art, an embodiment of the present invention provides a pump tower base for fixing a pump tower for loading and / or unloading liquid cargo. The pump tower base passes through the pump tower bottom plate, and the components of the pump tower base are symmetrically arranged, with simple structure, convenient installation, convenient construction, low accuracy requirements, and safe and reliable base, which is very practical.

[0010] An embodiment of the present invention provides a pump tower base for a cryogenic liquid cargo storage tank. The pump tower base is used to limit the position of a pump tower for injecting liquid into the cryogenic liquid cargo storage tank. The pump tower base includes:

[0011] A cylinder body, the lower part of which is fixedly connected to the bottom wall of the cryogenic liquid cargo storage tank. Support piles symmetrically arranged with respect to the cylinder body are provided in the middle of the cylinder body, and a connecting gusset plate located outside the cylinder body is provided at the upper part of the cylinder body;

[0012] A top block, one side surface of which is connected to the connecting gusset plate, and the other side is fixedly connected to the pump tower bottom plate of the pump tower through a connecting member;

[0013] Wherein, when the position of the pump tower is limited by the pump tower base, the upper connecting gusset plate of the cylinder body is made to pass upward through a limiting hole opened at the center of the pump tower bottom plate and adapted to the shape of the frame structure formed by connecting in sequence with the connecting gusset plate. There are multiple top blocks and they are symmetrically arranged about the central axis in the vertical direction of the cylinder body. One side of the top block is fixedly connected to the pump tower bottom plate through a fixed connecting member, and the other side of the top block is fixed to the connecting gusset plate passing upward through the pump tower bottom plate. The position where the top block is connected to the connecting gusset plate is within a set area in the middle of the connecting gusset plate in the vertical direction, and the distance between the frame structure formed by connecting the connecting gusset plate in sequence and the inner side edge of the limiting hole is not greater than 150 mm.

[0014] In some embodiments of the present invention, two connecting rings are provided in the lower half of the cylinder body, and the two connecting rings are respectively fixedly connected to the main shielding layer and the secondary shielding layer in the cryogenic liquid cargo storage tank;

[0015] There are two support piles, and both are arranged parallel to the bottom of the cryogenic liquid cargo storage tank.

[0016] In some embodiments of the present invention, each support pile includes two support pile enclosing walls arranged in parallel and fixedly connected to the outer wall of the cylinder body, a support pile panel located at the end of the support pile enclosing wall away from the cylinder body and fixedly connected to both support pile enclosing walls at the same time, and a support pile flat plate arranged between the two support pile enclosing walls and fixedly connected to the outer wall of the cylinder body, the support pile panel and the outer wall of the cylinder body at the same time; wherein,

[0017] The support pile flat plate is in the middle area in the height direction of the support pile.

[0018] In some embodiments of the present invention, the connecting gusset plates arranged at the upper part of the cylinder body are 4 in number and enclose to form a square frame structure;

[0019] The top end of the connecting gusset plate is flush with the upper end surface of the cylinder body. A support flat plate parallel to the bottom of the cryogenic liquid cargo storage tank is provided in the middle of the square frame structure. The support flat plate is in the middle area in the height direction of the connecting gusset plate and is perpendicular or parallel to the connecting gusset plate.

[0020] In some embodiments of the present invention, a plurality of horizontal reinforcing plates are sequentially provided inside the cylinder along its height direction, and at least some of the plurality of horizontal reinforcing plates include horizontal reinforcing plates disposed in the same plane as the support pile flat plate, the support flat plate, and the connecting ring respectively;

[0021] The horizontal reinforcing plate is a flat plate structure adapted to the inner side wall of the cylinder or an annular plate structure whose outer side is adapted to the inner surface of the cylinder.

[0022] In some embodiments of the present invention, after the upper connecting enclosure of the cylinder passes upward through the limiting hole opened at the center of the pump tower bottom plate and adapted to the shape of the frame structure formed by sequentially connecting the connecting enclosures, the upper edge of the cylinder is 300 mm - 500 mm higher than the pump body bottom plate, and the connecting enclosures are all located above the pump body bottom plate.

[0023] There are 4 top blocks, and they respectively correspond to one connecting enclosure;

[0024] The top block is specifically fixedly connected to the connecting elbow plate welded and fixed on the pump tower bottom plate through bolts.

[0025] In some embodiments of the present invention, each top block includes:

[0026] A top block panel, on the side facing the connecting enclosure, a card slot for embedding the top block connecting plate is opened, and the top block connecting plate is made of elastic PE material;

[0027] Two parallel top block vertical support plates are fixedly arranged on the side of the top block panel away from the connecting enclosure at intervals, and are perpendicular to the top block panel. Each top block vertical support plate is provided with an oval hole for fixedly connecting with the connecting rib plate;

[0028] A horizontal support plate is arranged between the two top block vertical support plates and is in the middle area in the height direction of the top block vertical support plates. The horizontal support plate is fixedly connected to the top block vertical support plates and the top block panel.

[0029] In some embodiments of the present invention, two oval holes are arranged vertically and distributed on each top block vertical support plate.

[0030] In some embodiments of the present invention, the diagonal of the square frame structure formed by enclosing the connecting enclosures is consistent with the longitudinal direction of the hull where it is located.

[0031] Compared with the prior art, the beneficial effect of the pump tower base of the cryogenic liquid cargo storage tank provided by the embodiment of the present invention is that: by changing the layout type of the pump tower base and the pump tower bottom plate, the top of the pump tower base is passed through the opening reserved in the pump tower bottom plate. This layout method can arrange the connecting components of the pump tower base and the pump tower above the pump tower bottom plate. The space above the pump tower bottom plate is large, which can effectively improve the construction environment, avoid looking up for installation, and facilitate the installation of the connecting components between the pump tower and the pump tower base; the connecting components are arranged on the pump tower bottom plate, and more supporting components are arranged around it, which can change the cantilever beam force type of the existing design to only bear in-plane pressure. , which improves the safety of the components and helps to improve the overall stability of the pump tower; there is a certain gap between the pump tower base and the reserved openings in the pump tower bottom plate. At the same time, the connection components between the pump tower base and the pump tower adopt waist-round bolt holes. This connection method can effectively reduce the installation accuracy requirements and realize the rapid positioning and assembly of the pump tower and the pump tower base; the connection components between the pump tower base and the pump tower are four identical top blocks. The top blocks of the same design help to reduce the types and specifications of parts assembled on site and improve installation efficiency; the four top blocks arranged in a diamond shape can each withstand longitudinal and lateral loads at the same time, which can effectively improve the safety of the connection between the pump tower base and the pump tower. BRIEF DESCRIPTION OF THE DRAWINGS

[0032] Figure 1 An axonometric diagram illustrating the connection between the pump tower base and the pump tower bottom plate of a cryogenic liquid cargo storage tank provided in an embodiment of the present invention;

[0033] Figure 2 A schematic top view of the connection between the pump tower base and the pump tower bottom plate of a cryogenic liquid cargo storage tank provided in an embodiment of the present invention;

[0034] Figure 3 for Figure 2 A-A top view diagram in FIG.

[0035] Figure 4 An axonometric diagram of a pump tower base of a cryogenic liquid cargo storage tank provided in an embodiment of the present invention;

[0036] Figure 5 A schematic top view of a pump tower base of a cryogenic liquid cargo storage tank provided in an embodiment of the present invention;

[0037] Figure 6 A schematic side view of a pump tower base of a cryogenic liquid cargo storage tank provided in an embodiment of the present invention;

[0038] Figure 7 A schematic central cross-sectional view of a pump tower base of a cryogenic liquid cargo storage tank provided by an embodiment of the present invention;

[0039] Figure 8 A schematic axonometric view of a top block of a pump tower base of a cryogenic liquid cargo storage tank provided by an embodiment of the present invention;

[0040] Figure 9 The top view schematic diagram of the top block of the pump tower base of the cryogenic liquid cargo storage tank provided by the embodiment of the present invention;

[0041] Figure 10 The axonometric schematic diagram of the pump tower base of the cryogenic liquid cargo storage tank corresponding to the pump tower provided by the embodiment of the present invention;

[0042] Figure 11 The front view schematic diagram of the pump tower base of the cryogenic liquid cargo storage tank corresponding to the pump tower provided by the embodiment of the present invention;

[0043] Figure 12 The upper top view schematic diagram of the pump tower base of the cryogenic liquid cargo storage tank corresponding to the pump tower provided by the embodiment of the present invention;

[0044] Figure 13 The lower top view schematic diagram of the pump tower base of the cryogenic liquid cargo storage tank corresponding to the pump tower provided by the embodiment of the present invention;

[0045] Figure 14 The top view schematic diagram of the injection pipe and the injection pipe clamp of the pump tower base of the cryogenic liquid cargo storage tank corresponding to the pump tower provided by the embodiment of the present invention;

[0046] Figure 15 The axonometric schematic diagram of the injection pipe clamp of the pump tower base of the cryogenic liquid cargo storage tank corresponding to the pump tower provided by the embodiment of the present invention;

[0047] Figure 16 The side view schematic diagram of the injection pipe clamp of the pump tower base of the cryogenic liquid cargo storage tank corresponding to the pump tower provided by the embodiment of the present invention;

[0048] Figure 17 The axonometric schematic diagram of the injection pipe and the anti-liquid impact device of the pump tower base of the cryogenic liquid cargo storage tank corresponding to the pump tower provided by the embodiment of the present invention;

[0049] Figure 18 The axonometric schematic diagram of the anti-liquid impact device arranged at the opening of the injection pipe of the pump tower base of the cryogenic liquid cargo storage tank corresponding to the pump tower provided by the embodiment of the present invention;

[0050] Figure 19 The top view schematic diagram of the anti-liquid impact device arranged at the opening of the injection pipe of the pump tower base of the cryogenic liquid cargo storage tank corresponding to the pump tower provided by the embodiment of the present invention;

[0051] Figure 20 The side view schematic diagram of the anti-liquid impact device arranged at the opening of the injection pipe of the pump tower base of the cryogenic liquid cargo storage tank corresponding to the pump tower provided by the embodiment of the present invention;

[0052] Figure 21Front view schematic diagram of the anti-liquid impact device provided at the injection pipe opening of the pump tower base of the cryogenic liquid cargo storage tank according to the embodiment of the present invention.

[0053] Reference numerals

[0054] 11. First unloading pipe; 12. Second unloading pipe; 13. Injection pipe; 14. Emergency unloading pipe; 15. Pump tower bottom plate; 16. Horizontal support; 17. Diagonal brace; 18. Unloading pump; 19. Anti-liquid impact device; 21. First elbow; 22. Second elbow; 23. Third elbow; 30. Pipe clamp component; 31. Pipe clamp connecting elbow plate; 32. Pipe clamp cushion block; 33. Pipe clamp sleeve; 40. Opening; 41. Bottom plate; 42. Side wall; 43. Enclosing wall; 44. Horizontal fixing plate; 45. First water flow hole; 46. Second water flow hole; 47. Arc-shaped side; 50. Pump tower base; 51. Top block; 52. Connecting elbow plate; 53. Limit hole; 61. Cylinder body; 62. Connecting ring; 63. Connecting enclosing plate; 64. Support pile panel; 65. Support pile enclosing wall; 66. Support pile flat plate; 67. Horizontal strengthening plate; 68. Support flat plate; 71. Vertical support plate; 72. Top block panel; 73. Top block connecting plate; 74. Horizontal support plate; 75. Waist-shaped round hole. Detailed implementation manners

[0055] To enable those skilled in the art to better understand the technical solutions of the present invention, the present invention will be described in detail below with reference to the accompanying drawings and specific implementation manners.

[0056] Reference is made herein to the various solutions and features of the present application described with reference to the drawings.

[0057] These and other features of the present application will become apparent from the following description of the preferred forms of the embodiments given as non-limiting examples with reference to the accompanying drawings.

[0058] It should also be understood that although the present application has been described with reference to some specific examples, those skilled in the art can surely implement many other equivalent forms of the present application, which have the features as claimed and thus are all within the protection scope defined thereby.

[0059] When combined with the accompanying drawings, the above and other aspects, features and advantages of the present application will become more apparent in view of the following detailed description.

[0060] Specific embodiments of the present application will be described hereinafter with reference to the accompanying drawings. However, it should be understood that the embodiments claimed are merely examples of the present application, which can be implemented in various ways. Well-known and / or repetitive functions and structures are not described in detail to clarify the true intent based on the user's historical operations and to avoid obscuring the present application with unnecessary or redundant details. Therefore, the specific structural and functional details claimed herein are not intended to be limiting, but are merely a basis and representative basis for the claims to teach those skilled in the art to use the present application in substantially any suitable detailed structure in a variety of ways.

[0061] This specification may use the phrases "in one embodiment", "in another embodiment", "in yet another embodiment", or "in other embodiments", each of which may refer to one or more of the same or different embodiments according to the present application.

[0062] An embodiment of the present invention provides a pump tower base 50 for a cryogenic liquid cargo storage tank. The pump tower base 50 is used to position-limit a pump tower for filling / unloading liquid into / from the cryogenic liquid cargo storage tank. The cryogenic liquid cargo storage tank can be used to store gases such as liquefied natural gas and ethane gas, and can be used as the cryogenic liquid cargo storage tank of a liquid transport ship or as the cryogenic liquid cargo storage tank of other ships using cryogenic liquid as fuel, such as Figures 1 to 9 As shown, the pump tower base 50 includes:

[0063] A cylinder body 60, the lower part of which is fixedly connected to the bottom wall of the cryogenic liquid cargo storage tank. Support piles are symmetrically arranged about the cylinder body 61 in the middle of the cylinder body 61. A connecting gusset plate 63 is provided outside the cylinder body 61 at the upper part of the cylinder body 61. Among them, when the pump tower is position-limited by the pump tower base 50, the upper connecting gusset plate 63 of the cylinder body 61 is made to pass upward through a limiting hole 53 opened at the center of the pump tower bottom plate 15 and adapted to the shape of the frame structure formed by connecting in sequence with the connecting gusset plate 63. There are multiple top blocks 51 and they are symmetrically arranged about the vertical center line of the cylinder body 61. One side of the top block 51 is fixedly connected to the pump tower bottom plate 15 through a connecting elbow plate 52, so that the other side of the top block 51 fixes the connecting gusset plate 63 that has passed upward through the pump tower bottom plate 15. The position where the top block 51 is connected to the connecting gusset plate 63 is within a set area in the middle of the connecting gusset plate 63 in the vertical direction, and the distance between the frame structure formed by connecting the connecting gusset plate 63 in sequence and the inner side of the limiting hole 53 is not greater than 150 mm, that is, the gap between the frame structure formed by connecting the connecting gusset plate 63 in sequence and the limiting hole 53 can be 50 - 150 mm, so that when the pump tower is installed, by adopting the above arrangement, it is convenient for the pump tower base 50 to pass through the limiting hole 53 to achieve the rapid positioning and assembly of the pump tower.

[0064] In this embodiment, two connecting rings 62 are provided on the lower half of the cylinder body 61. The two connecting rings 62 are respectively fixedly connected to the main shielding layer and the secondary shielding layer in the cryogenic liquid cargo storage tank. After the cylinder body 61 is fixedly connected to the main shielding layer and the secondary shielding layer in the cryogenic liquid cargo storage tank through the two connecting rings 62, the sealing performance of the cryogenic liquid cargo storage tank can be ensured; there are two support piles, and both are arranged parallel to the bottom of the cryogenic liquid cargo storage tank. Combining the symmetric arrangement of the two support piles with respect to the cylinder body 61 can ensure that the pump tower base 50 has good stability. Specifically, one support pile is used to support the gas pump or the stripping and spraying pump, and the other is used to support the liquid level gauge.

[0065] In some embodiments of the present invention, each support pile includes two support pile enclosures 65 arranged in parallel and fixedly connected to the outer wall of the cylinder body 61, a support pile panel 64 at the end of the support pile enclosure 65 away from the cylinder body 61 and fixedly connected to the two support pile enclosures 65 at the same time, and a support pile flat plate 66 arranged between the two support pile enclosures 65 and fixedly connected to the outer wall of the cylinder body 61, the support pile panel 64 and the outer wall of the cylinder body 61 at the same time. The support pile enclosures 65, the support pile panel 64 and the cylinder body 61 enclose an approximately rectangular frame structure; wherein, the support pile flat plate 66 is in the middle area in the height direction of the support pile. As a preferred solution, the support pile flat plate 66 is located at the position of half of the height of the support pile to ensure the stability of the support of the support pile. At the same time, the support pile flat plate 66 is arranged parallel to the bottom of the cryogenic liquid cargo storage tank. The number of the support pile panels 64 is at least one, and the number can be increased according to the strength requirements. In addition, in this embodiment, the two support pile enclosures 65 are formed with extension parts at the end connected to the cylinder body 61, thereby increasing the length of the fixed connection between the support pile enclosures 65 and the cylinder body 61, and further improving the overall support strength and stability of the support pile.

[0066] In some embodiments of the present invention, the number of the connecting gusset plates 63 provided on the upper part of the cylinder body 61 is 4, which are arranged vertically and connected to each other to form a square frame structure. The cylinder body 61 can specifically adopt a cylindrical cylinder body or a regular prism cylinder body; the top end of the connecting gusset plate 63 is flush with the upper end face of the cylinder body 61. A support flat plate 68 parallel to the bottom of the cryogenic liquid cargo storage tank is provided in the middle of the square frame structure. The support flat plate 68 is in the middle area in the height direction of the connecting gusset plate 63 and is perpendicular or parallel to the connecting gusset plate 63.

[0067] In this embodiment, a plurality of horizontal reinforcing plates 67 are sequentially arranged in the cylinder body 61 from top to bottom along its height direction, and at least some of the plurality of horizontal reinforcing plates 67 include horizontal reinforcing plates 67 respectively arranged in the same plane as the support pile flat plate 66, the support flat plate 68, and the connecting ring 62, that is, a horizontal reinforcing plate 67 is arranged in the plane corresponding to the support pile flat plate 66, the support flat plate 68, and the connecting ring 62 to serve as the back support of the corresponding plate member and further enhance the overall strength of the support pile. At the same time, the horizontal reinforcing plate 67 can be a flat plate structure adapted to the inner side wall of the cylinder body 61 or an annular plate structure with the outer side adapted to the inner surface of the cylinder body 61, and is specifically selected according to the strength requirements of the pump tower base 50. That is, if the cylinder body 61 is a cylindrical cylinder body, the horizontal reinforcing plate 67 can be a circular flat plate structure or a circular annular plate structure.

[0068] In some embodiments of the present invention, after the upper connecting apron 63 of the cylinder body 61 passes upward through the limiting hole 53 opened at the center of the pump tower bottom plate 15 and adapted to the shape of the frame structure formed by sequentially connecting the connecting apron 63, the upper edge of the cylinder body 60 is 300 mm - 500 mm higher than the height of the pump body bottom plate, and the connecting apron 63 is located above the pump body bottom plate.

[0069] In some embodiments of the present invention, there are 4 connecting aprons 63, and they enclose a square frame structure; there are 4 top blocks 51, and each corresponds to a connecting apron 63. Each top block 51 is located at the center position of the corresponding connecting apron. The top block 51 is specifically fixedly connected to the connecting elbow plate 52 welded and fixed on the pump tower bottom plate 15 through bolts, and the pump tower base 50 realizes the limit of the pump tower through the top block 51.

[0070] In this embodiment, each top block 51 includes: a top block panel 72, which is provided with a card slot for embedding a top block connecting plate 73 on the side facing the connecting gusset plate 63. The card slot is opened in the central area of the top block panel 72, so that the top block connecting plate 73 after being embedded and installed is located in the central area of the top block panel 72. Through the card slot, the top block panel 72 and the top block connecting plate 73 can be tightly connected. The top block connecting plate 73 is made of elastic PE material. Therefore, after the top block connecting plate 73 is connected to the connecting gusset plate 63, the connection tightness between the top block 51 and the connecting gusset plate 63 can be improved; two vertically arranged support plates 71 arranged in parallel, which are fixedly arranged on the side of the top block panel 72 away from the connecting gusset plate 63 at intervals and are perpendicular to the top block panel 72. The two vertically arranged support plates 71 are both vertically arranged, and each vertically arranged support plate 71 is provided with an oblong hole 75 for fixedly connecting with the connecting rib plate 52; a horizontal support plate 74, which is arranged between the two vertically arranged support plates 71 and is located in the middle area in the height direction of the vertically arranged support plates 71. The horizontal support plate 74 is fixedly connected with the vertically arranged support plates 71 and the top block panel 72. Among them, the connecting elbow plate 52 is located at the upper end of the pump tower bottom plate 15 and is connected to other support members of the pump tower bottom plate 15 by welding. This layout can effectively transfer the support reaction force generated by the pump tower base 50 to other support members of the pump tower bottom plate 15, avoiding local stress concentration.

[0071] In the above embodiment, two oblong holes 75 are arranged up and down on each vertically arranged support plate 71 for being fixedly connected to the connecting elbow plate 52 arranged on the pump tower bottom plate 15 through bolts. The function of the oblong hole 75 is to fine-tune the distance between the top block 51 and the connecting elbow plate 52, thereby reducing the installation accuracy requirements for the pump tower and the pump tower base 50.

[0072] Meanwhile, in this embodiment, the diagonal of the square frame structure formed by enclosing the connecting gusset plate 63 is consistent with the longitudinal direction of the hull where it is located. Therefore, each top block 51 can bear longitudinal and transverse loads simultaneously, which can effectively improve the safety of the connection between the pump tower base 50 and the pump tower.

[0073] In this embodiment, as Figures 10 to 16As shown in the figure, the pump tower includes: a vertically arranged first discharge pipe 11, a second discharge pipe 12, an injection pipe 13, and an emergency discharge pipe 14. Among them, the first discharge pipe 11, the second discharge pipe 12, the injection pipe 13, and the emergency discharge pipe 14 are sequentially fixedly connected through parallel supports and form a prism structure with a quadrilateral cross-section. The quadrilateral cross-section main frame is composed of 4 riser pipes, namely the first discharge pipe 11, the second discharge pipe 12, the injection pipe 13, and the emergency discharge pipe 14. That is, the four riser pipes and the connected parallel supports together define a prism with a quadrilateral cross-section. At the same time, a first elbow 21 is provided in the middle and lower part of the first discharge pipe 11 in its height direction, and the first elbow 21 is in the plane where the first discharge pipe 11 and the emergency discharge pipe 14 are located. A second elbow 22 is provided in the middle and lower part of the second discharge pipe 12 in its height direction, and the second elbow 22 is in the plane where the second discharge pipe 12 and the emergency discharge pipe 14 are located. A third elbow 23 is provided in the middle and lower part of the injection pipe 13 in its height direction, and the third elbow 23 is in the plane where the injection pipe 13 and the emergency discharge pipe 14 are located. Among them, the area of the quadrilateral cross-section formed by the part of the first discharge pipe 11 below the first elbow 21, the part of the second discharge pipe 12 below the second elbow 22, the part of the injection pipe 13 below the third elbow 23, and the emergency discharge pipe 14 is 2 to 3 times the area of the quadrilateral cross-section formed by the upper part of the first discharge pipe 11, the upper part of the second discharge pipe 12, the upper part of the injection pipe 13, and the upper part of the emergency discharge pipe 14, so as to form a space for arranging related equipment between the first discharge pipe 11, the second discharge pipe 12, the injection pipe 13, and the emergency discharge pipe 14. That is, through the first elbow 21, the second elbow 22, and the third elbow 23, the space formed by the first discharge pipe 11, the second discharge pipe 12, the injection pipe 13, and the emergency discharge pipe 14 in the lower area of the pump tower is increased, which is convenient for installing and arranging equipment such as the discharge pump 18. At the same time, the pump tower has a variable cross-section structure.

[0074] In some embodiments of the present invention, the parallel supports are multiple layers. Each layer of parallel supports connects 4 vertically arranged riser pipes to form an annular support on the same horizontal plane, and a diagonal brace 17 is provided between adjacent two layers of parallel supports to resist the torque of the pump tower. By setting the horizontal support 16 and the diagonal brace 17 in the pump tower frame structure, the pump tower is connected into an integral truss structure, which can effectively resist the sloshing load and improve the stiffness and torsional resistance of the pump tower.

[0075] Furthermore, when injecting cryogenic liquid cargo into the storage tank, the injection is carried out through the injection pipe 13. As a result, there may be a temperature difference between the injection pipe 13 and other pump tower components, leading to asynchronous thermal expansion and contraction. If the injection pipe 13 is connected to the horizontal support 16 and the diagonal brace 17 by welding, it will cause significant temperature stress and pose a risk to structural safety. The injection pipe 13 is fixedly connected to the parallel support through the pipe clamp component 30. The pipe clamp component 30 enables the injection pipe 13 to move in the vertical direction and restricts the movement of the injection pipe 13 in the horizontal direction. There can be multiple pipe clamp components 30, that is, the injection pipe 13 is respectively connected to the parallel support of one layer through at least one pipe clamp component 30. Each pipe clamp component 30 includes a pipe clamp sleeve 33 and a pipe clamp pad 32. Among them, the pipe clamp sleeve 33 is concentric with the injection pipe 13, and at least two pipe clamp pads 32 fixedly connected to the pipe clamp sleeve 33 are provided between the pipe clamp sleeve 33 and the injection pipe 13, so as to form a spacing of at least 10 mm between the pipe clamp sleeve 33 and the injection pipe 13. The pipe clamp pad 32 and the pipe clamp sleeve 33 are fixedly connected through a connecting piece, and the connecting piece can be a bolt or a rivet, etc.

[0076] In this embodiment, the injection pipe 13 is fixedly connected to the parallel support through the pipe clamp sleeve 33, and at least one pipe clamp connecting elbow plate 31 is provided at the connection between the pipe clamp sleeve 33 and the parallel support. Specifically, one pipe clamp sleeve 33 is simultaneously fixedly connected to two horizontal supports 16 in the same layer. Furthermore, a large-sized pipe clamp connecting elbow plate 31 can be provided between the two horizontal supports 16, and the large-sized pipe clamp connecting elbow plate 31 is simultaneously fixedly connected to the two horizontal supports 16 and the pipe clamp sleeve 33. On the outer sides of the two horizontal supports 16 away from the large-sized pipe clamp connecting elbow plate 31, smaller-sized pipe clamp connecting elbow plates 31 are respectively provided to fixedly connect the corresponding horizontal support 16 and the pipe clamp sleeve 33, thereby improving the stiffness at the connection position between the horizontal support 16 and the pipe clamp sleeve 33 and reducing local stress concentration.

[0077] The lower end of the injection pipe 13 is fixedly connected to the pump tower bottom plate 15. The injection pipe 13 is kept vertical at a position close to the bottom of the storage tank, and the lower end opening of the injection pipe 13 is located below the pump tower bottom plate 15. An anti-liquid impact device 19 is provided at the opening of the injection pipe 13 to guide the liquid injected through the injection pipe 13, thereby avoiding direct impact on the liquid cargo storage tank when injecting cryogenic liquid (liquid cargo), slowing down the flow rate of the cryogenic liquid when injecting through the injection pipe 13, and avoiding the influence of fluid jet. Among them, such as Figures 17 to 21As shown, the fluid impact prevention device 19 includes: a bottom plate 41, which is arranged below the opening 40 of the injection pipe 13 and has a diversion surface formed on the side facing the opening 40. The bottom plate 41 can protect the storage tank from the influence of the fluid in the injection tank and falling objects. Specifically, the bottom plate 41 is arranged below the opening 40 of the injection pipe 13 and maintains a spacing distance from the opening 40; two side walls 42 arranged in parallel, and the lower end of each side wall 42 is fixedly connected to the bottom plate 41, and the upper end of each side wall 42 is fixedly connected to the outer side wall 42 of the bottom end of the injection pipe 13 through a horizontal fixing plate 44. The side walls 42 are the main supporting devices of the fluid impact prevention device; two enclosing walls 43, which are respectively arranged between the two side walls 42. The two enclosing walls 43 are arranged in parallel and perpendicular to the two side walls 42, and are connected to the two side walls 42 to form a whole, thereby enclosing a rectangular enclosing wall 43 structure; wherein, at least one wall of the rectangular enclosing wall structure formed by the two side walls 42 and the two enclosing walls 43 is provided with a water flow hole, and the number of walls provided with water flow holes in the rectangular enclosing wall structure, as well as the number and opening size of the water flow holes, are determined based on the flow velocity and flow direction of the fluid after being diverted by the diversion plate. That is, by setting water flow holes on the side walls 42 or the enclosing walls 43 and adjusting the opening size of the water flow holes, the flow velocity and flow direction of the fluid diversion can be controlled, so that the fluid injected into the storage tank is deflected and preferably injected in the direction opposite to the equipment components to be protected. At the same time, the sum of the cross-sectional areas of all the water flow holes is greater than the cross-sectional area of the opening 40 of the water injection pipe 13.

[0078] In order to be able to divert the injected liquid more quickly, in some embodiments of the present invention, the bottom plate 41 is a spherical panel, and the convex side of the spherical panel faces the opening 40 of the injection pipe 13 as the diversion surface. The center of the sphere of the spherical panel is on the vertical axis of the injection pipe 13. The bottom plate 41 is rectangular in its top view, and its area is larger than the area of the opening 40 of the injection pipe 13. Compared with the bottom plate 41 on the horizontal plane, the spherical panel bottom plate 41 can generate a lateral velocity component for the vertically injected liquid, realizing uniform and rapid diversion of the fluid to the surroundings, and can effectively reduce the impact load of the injected liquid on the bottom plate 41, protecting the fluid impact prevention device.

[0079] In addition, in order to be able to better divert the liquid, in this embodiment, the side wall 42 is a flat panel. If a first water flow hole 45 is provided on the side wall 42, the first water flow hole 45 is opened on the side of the side wall 42 close to the bottom plate 41 and is centered, and the upper part of the first water flow hole 45 is semi-elliptical in shape and is arranged in a floor-standing manner to realize the diversion of the injected liquid and help the rapid export of the fluid.

[0080] At the same time, in this embodiment, both side edges of the surrounding wall 43 are connected to the side walls 42, and the bottom edge of the surrounding wall 43 is fixedly connected to the bottom plate 41; if a second water flow hole 46 is opened on the surrounding wall 43, the second water flow hole 46 is opened on the side of the surrounding wall 43 close to the bottom plate 41 and is centrally arranged, and is semi-circular, and is arranged on the ground to achieve diversion of the injected liquid and help to quickly discharge the fluid.

[0081] In this embodiment, horizontal fixing plate 44 is located at the top of side wall 42. Its side edge facing injection pipe 13 is a circular arc-shaped side edge 47, and the radius of circular arc-shaped side edge 47 is the same as the outer radius of injection pipe 13. Horizontal fixing plate 44 is fixed to the outer wall of injection pipe 13 by welding. The horizontal plane on which horizontal fixing plate 44 is located is higher than the horizontal plane on which opening 40 of injection pipe 13 is located, and the vertical spacing is 30mm-100mm, thereby facilitating welding of horizontal fixing plate 44. Furthermore, horizontal fixing plates 44 on both side walls 42 are arranged symmetrically with respect to injection pipe 13, effectively securing the fluid impact prevention device to the lower end of injection pipe 13 and preventing twisting of the fluid impact prevention device, thereby ensuring the stability of the device.

[0082] It can be seen from the above technical solution that the pump tower base 50 of the cryogenic liquid cargo storage tank provided by the above embodiment of the present invention, by changing the layout type of the pump tower base 50 and the pump tower bottom plate 15, the top of the cylinder 61 of the pump tower base 50 is passed through the reserved opening in the pump tower bottom plate 15. This layout method can arrange the connecting components of the pump tower base 50 and the pump tower (top block 51, connecting elbow plate 52, connecting enclosure 63, etc.) on the top of the pump tower bottom plate 15. The space above the pump tower bottom plate 15 is large, which can effectively improve the construction environment, avoid looking up at the assembly, and facilitate the installation of the connecting components between the pump tower and the pump tower base 50; the connecting components are arranged on the pump tower bottom plate 15, and more supporting components can be arranged around it, which can replace the cantilever beam load-bearing components of the existing design. The type is changed to only bear in-plane pressure, which improves the safety of the components and helps to improve the overall stability of the pump tower; there is a certain gap between the pump tower base 50 and the limit hole 53 reserved in the pump tower bottom plate 15. At the same time, the connection component between the pump tower base 50 and the pump tower adopts waist-round bolt holes 75. This connection method can effectively reduce the installation accuracy requirements and realize the rapid positioning and assembly of the pump tower and the pump tower base 50; the connection component between the pump tower base 50 and the pump tower is four identical top blocks 51. The top blocks 51 of the same design help to reduce the types and specifications of parts assembled on site and improve installation efficiency; the four top blocks 51 arranged in a diamond shape can each withstand longitudinal and lateral loads at the same time, which can effectively improve the safety of the connection between the pump tower base 50 and the pump tower.

[0083] The above embodiments are only exemplary embodiments of the present invention and are not used to limit the present invention. The protection scope of the present invention is defined by the claims. Those skilled in the art can make various modifications or equivalent replacements within the essence and protection scope of the present invention, and such modifications or equivalent replacements should also be regarded as falling within the protection scope of the present invention.

Claims

1. A pump tower base of a low-temperature liquid cargo storage tank, characterized in that, The pump tower base is used to position the pump tower for filling / unloading liquid to / from the cryogenic liquid cargo storage tank. The pump tower base includes: A cylinder body, whose lower part is fixedly connected to the bottom wall of the cryogenic liquid cargo storage tank. At the middle part of the cylinder body, there are support piles symmetrically arranged with respect to the cylinder body. At the upper part of the cylinder body, there is a connecting gusset plate located outside the cylinder body; A top block, one side of which is connected to the connecting gusset plate, and the other side is fixedly connected to the pump tower bottom plate of the pump tower through a connecting member. There are multiple top blocks, which are symmetrically arranged about the central axis in the vertical direction of the cylinder body; Wherein, when positioning the pump tower through the pump tower base, the upper connecting gusset plate of the cylinder body is made to pass upward through a limiting hole opened at the center of the pump tower bottom plate and adapted to the shape of the frame structure formed by sequentially connecting the connecting gusset plates. One side of the top block is fixedly connected to the pump tower bottom plate through a fixed connecting member, and the other side of the top block is used to fix the connecting gusset plate that has passed upward through the pump tower bottom plate. The position where the top block is connected to the connecting gusset plate is within a set area in the middle part in the vertical direction of the connecting gusset plate, and the distance between the frame structure formed by sequentially connecting the connecting gusset plates and the inner side edge of the limiting hole is not greater than 150 mm.

2. The pump tower base of the cryogenic liquid cargo storage tank according to claim 1, wherein Two connecting rings are provided at the lower half part of the cylinder body, and the two connecting rings are respectively fixedly connected to the main shielding layer and the secondary shielding layer inside the cryogenic liquid cargo storage tank; There are two support piles, and both are arranged parallel to the bottom of the cryogenic liquid cargo storage tank.

3. The pump tower base of the cryogenic liquid cargo storage tank according to claim 2, wherein Each support pile includes two support pile gusset plates arranged in parallel and fixedly connected to the outer wall of the cylinder body, a support pile panel located at the end of the support pile gusset plate away from the cylinder body and fixedly connected to both support pile gusset plates at the same time, and a support pile flat plate arranged between the two support pile gusset plates and fixedly connected to the outer wall of the cylinder body, the support pile panel and the outer wall of the cylinder body at the same time; wherein The support pile flat plate is in the middle area in the height direction of the support pile.

4. The pump tower base of the cryogenic liquid cargo storage tank according to claim 2, wherein The connecting gusset plates arranged at the upper part of the cylinder body are 4 in number and enclose a square frame structure; The top end of the connecting gusset plate is flush with the upper end surface of the cylinder body. A support flat plate parallel to the bottom of the cryogenic liquid cargo storage tank is provided in the middle of the square frame structure. The support flat plate is in the middle area in the height direction of the connecting gusset plate and is perpendicular or parallel to the connecting gusset plate.

5. The pump tower base of the cryogenic liquid cargo storage tank according to claim 4, wherein Multiple horizontal reinforcing plates are sequentially arranged along the height direction inside the cylinder body, and at least some of the multiple horizontal reinforcing plates include horizontal reinforcing plates arranged in the same plane as the support pile flat plate, the support flat plate and the connecting ring respectively; The horizontal reinforcing plate is a flat plate structure adapted to the inner side wall of the cylinder body or an annular plate structure whose outer side is adapted to the inner side surface of the cylinder body.

6. The pump tower base of the cryogenic liquid cargo storage tank according to claim 1, wherein After the upper connecting fence of the cylinder body passes upward through the limiting hole opened at the center of the pump tower bottom plate and adapted to the shape of the frame structure formed by sequentially connecting the connecting fences, the upper edge of the cylinder body is 300 mm - 500 mm higher than the pump tower bottom plate, and the connecting fences are all located above the pump tower bottom plate.

7. The pump tower base of the cryogenic liquid cargo storage tank according to claim 1, wherein There are 4 connecting fences, which enclose to form a square frame structure; There are 4 top blocks, which respectively correspond to one connecting fence; The top block is specifically fixedly connected to the connecting elbow plate welded and fixed on the pump tower bottom plate through bolts.

8. The pump tower base of the cryogenic liquid cargo storage tank according to claim 7, characterized in that, Each of the top blocks includes: A top block panel, on the side facing the connecting fence, there is a card slot for embedding a top block connecting plate, and the top block connecting plate is made of elastic PE material; Two parallel top block vertical support plates, which are fixedly arranged on the side of the top block panel away from the connecting fence at intervals, and are perpendicular to the top block panel. Each top block vertical support plate is provided with an oval hole for fixedly connecting with the connecting rib plate; A horizontal support plate, which is arranged between the two top block vertical support plates and is in the middle area in the height direction of the top block vertical support plates. The horizontal support plate is fixedly connected to the top block vertical support plates and the top block panel.

9. The pump tower base of the cryogenic liquid cargo storage tank according to claim 8, wherein Each top block vertical support plate is provided with two oval holes distributed vertically.

10. The pump tower base of the cryogenic liquid cargo storage tank according to claim 7, wherein The diagonal of the square frame structure formed by enclosing the connecting fences is consistent with the longitudinal direction of the hull where it is located.

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