Fluid-impact prevention device

Abstract

A fluid-impact prevention device, which is arranged at an opening in the bottom of an injection pipe and is configured to guide the flow of a liquid injected via the injection pipe. The fluid-impact prevention device comprises: a bottom plate, which is arranged below the opening of the injection pipe, a flow guide face being formed on the side of the bottom plate that faces the opening; two side walls arranged in parallel, wherein a lower end of each side wall is fixedly connected to the bottom plate, and an upper end of each side wall is fixedly connected to an outer side wall of a bottom end of the injection pipe by means of a horizontal fixing plate; and two enclosure walls, which are arranged between the two side walls, so as to enclose with the two side walls to form a rectangular enclosure wall structure, wherein a water flow hole is formed in at least one wall of the rectangular enclosure wall structure formed by the two side walls and the two enclosure walls, and the number of the walls, in which flowing water holes are formed, of the rectangular enclosure wall structure and the number and opening size of the water flow holes are all determined on the basis of the flow rate and flow direction of a fluid after being guided by the flow guide plate; and the sum of the cross-sectional areas of openings of all the water flow holes is greater than the cross-sectional area of the opening of the injection pipe.

Description

Fluid impact prevention device

[0001] Related applications

[0002] This application claims priority to Chinese patent application No. 202311169849.7 filed on September 12, 2023, and cites the contents disclosed in the above patent application as part of this application. Technical Field

[0003] The present disclosure relates to the technical field of equipment for transporting and storing cryogenic liquids, and in particular to a fluid impact prevention device for preventing cryogenic liquefied gas from directly impacting a cryogenic storage tank. Background Art

[0004] When transporting gases like natural gas and ethane over long distances, it's common to cool the gas to a low temperature and liquefy it for more economical transport. This liquefied gas significantly reduces its volume, lowering transportation costs. The liquefied cryogenic liquid is stored and transported in specialized cryogenic cargo tanks, with pump towers installed inside the tanks as a channel for the cryogenic liquid to enter and exit the tanks.

[0005] At the bottom of the injection pipe of the pump tower, an anti-fluid impact device needs to be installed to prevent the tank from being damaged due to liquid impact and fluid jet when injecting cryogenic liquid into the previously empty tank.

[0006] The connection method between similar devices in the existing technology and the injection pipe is not safe. When a large flow of fluid impacts, the device may become detached from the injection pipe, causing the liquid to directly impact the low-temperature storage tank; the internal components of the existing device and the injection pipe are fixed with slots, which requires very high assembly precision and is not conducive to on-site installation; and the bottom plate of the device is a horizontal component, and the liquid is easy to accumulate at the bottom of the injection pipe and cannot flow out quickly, affecting the liquid injection efficiency.

[0007] Summary of the Invention

[0008] In view of the above-mentioned problems existing in the prior art, an embodiment of the present disclosure provides a fluid impact prevention device, which is arranged at the bottom of a pump tower used for loading and / or unloading liquid cargo, so as to prevent the cryogenic liquefied gas from directly impacting the bottom of the storage tank when it is injected into the storage tank for storing and transporting cryogenic liquefied gas through the pump tower. At the same time, the fluid impact prevention device has a simple structure, convenient construction, low precision requirements, rapid diversion, and a large adjustment space for the flow rate and discharge angle of the fluid, which can effectively improve the liquid injection efficiency and quickly realize liquid diversion. At the same time, the device is safe and reliable, can effectively protect the cryogenic storage tank, and has high practical value.

[0009] The present disclosure provides a fluid impact prevention device, which is provided at the bottom opening of an injection pipe and is used to guide the liquid injected through the injection pipe. The fluid impact prevention device includes:

[0010] a bottom plate, which is arranged below the opening of the injection pipe and has a flow guide surface formed on a side facing the opening;

[0011] Two parallel side walls, the lower end of each side wall is fixedly connected to the bottom plate, and the upper end of each side wall is fixedly connected to the outer side wall of the bottom end of the injection pipe through a horizontal fixing plate;

[0012] Two surrounding walls are respectively arranged between the two side walls to form a rectangular surrounding wall structure together with the two side walls;

[0013] Among them, at least one wall of the rectangular wall structure formed by the two side walls and the two surrounding walls is provided with a water flow hole, and the number of walls with water flow holes in the rectangular wall structure, as well as the number and hole size of the water flow holes are determined based on the flow rate and flow direction of the fluid after being guided by the guide plate, and the sum of the cross-sectional areas of all the water flow holes is greater than the cross-sectional area of ​​the injection pipe opening.

[0014] In some embodiments of the present disclosure, the bottom plate is a spherical panel, and the convex side of the spherical panel faces the opening of the injection pipe as a guide surface, and the center of the spherical panel is on the vertical axis of the injection pipe.

[0015] In some embodiments of the present disclosure, the radius of the spherical face plate is 2 to 4 times the radius of the injection pipe.

[0016] In some embodiments of the present disclosure, the side wall is a flat plate. If a first water flow hole is provided on the side wall, the first water flow hole is provided on the side wall close to the bottom plate and is centrally arranged, and the upper portion of the first water flow hole is semi-circular.

[0017] In some embodiments of the present disclosure, both side edges of the surrounding wall are connected to the side walls, and the bottom edge of the surrounding wall is fixedly connected to the bottom plate; if a second water flow hole is opened on the surrounding wall, the second water flow hole is opened on the side of the surrounding wall close to the bottom plate and is centered, and is semi-circular.

[0018] In some embodiments of the present disclosure, a gap with a height dimension of 50 mm to 200 mm is formed between the upper edge of the surrounding wall and the edge of the injection pipe opening.

[0019] In some embodiments of the present disclosure, the horizontal fixing plate is located at the top of the side wall, and its side facing the injection pipe is an arc-shaped side, and the radius of the arc-shaped side is the same as the outer circle radius of the injection pipe; the horizontal plane where the horizontal fixing plate is located is higher than the horizontal plane where the opening of the injection pipe is located, and the vertical spacing is 30mm-100mm.

[0020] In some embodiments of the present disclosure, the horizontal fixing plate adopts a corner-cutting structure on both sides close to the surrounding wall, so as to increase the length of the arc-shaped side of the horizontal fixing plate and the injection pipe fixed connection side in a smaller space.

[0021] In some embodiments of the present disclosure, the angle between the two ends of the arc-shaped side of each horizontal fixing plate and the line connecting the vertical axis of the injection pipe is 90 degrees to 110 degrees.

[0022] In some embodiments of the present disclosure, the spacing between the bottom plate and the horizontal fixed plate is 200 mm to 400 mm, and the opening of the injection pipe is located between the bottom plate and the horizontal fixed plate.

[0023] Compared with the prior art, the beneficial effects of the fluid impact prevention device provided by the embodiment of the present disclosure are: it changes the connection type between the fluid impact prevention device and the injection pipe, and increases the connection area between the device and the injection pipe by adopting a symmetrical arrangement of multiple connecting plates, thereby improving the stability and safety of the device; the slot design of the internal components of the device and the injection pipe is eliminated, thereby reducing the installation accuracy requirements and facilitating the rapid installation of the device; the bottom plate of the device adopts a spherical design, and openings are provided on the surrounding walls. This combined design is conducive to the rapid flow of the injected liquid to the surroundings, and can achieve rapid diversion of the injected liquid, avoid liquid accumulation inside the device, and effectively improve the liquid injection efficiency; the flow rate and direction of the fluid diversion can be controlled by whether or not the water flow holes are provided on the surrounding walls of the device, and by adjusting the size of the openings, so that the fluid injected into the tank is deflected and preferably injected in the opposite direction of the equipment item to be protected. BRIEF DESCRIPTION OF THE DRAWINGS

[0024] FIG1 is an axonometric diagram of a fluid impact prevention device and an injection pipe provided in an embodiment of the present disclosure;

[0025] FIG2 is an axonometric diagram of a fluid impact prevention device provided by an embodiment of the present disclosure;

[0026] FIG3 is a schematic top view of a fluid impact prevention device provided by an embodiment of the present disclosure;

[0027] FIG4 is a side view of a fluid impact prevention device according to an embodiment of the present disclosure;

[0028] FIG5 is a front schematic diagram of a fluid impact prevention device provided by an embodiment of the present disclosure;

[0029] FIG6 is an axonometric diagram of a pump tower corresponding to an injection pipe where a fluid impact prevention device is located according to an embodiment of the present disclosure;

[0030] FIG7 is a front view schematic diagram of a pump tower corresponding to an injection pipe where a fluid impact prevention device according to an embodiment of the present disclosure is located;

[0031] FIG8 is a schematic top view of the upper portion of the pump tower corresponding to the injection pipe where the fluid impact prevention device provided by an embodiment of the present disclosure is located;

[0032] FIG9 is a schematic top view of the lower portion of the pump tower corresponding to the injection pipe where the fluid impact prevention device provided by an embodiment of the present disclosure is located;

[0033] FIG10 is a schematic top view of an injection pipe where the fluid impact prevention device provided in an embodiment of the present disclosure corresponds to an injection pipe of a pump tower and an injection pipe clamp;

[0034] FIG11 is an axonometric diagram of an injection pipe clamp of a pump tower corresponding to an injection pipe where an anti-fluid impact device is provided in an embodiment of the present disclosure;

[0035] FIG12 is a side view of an injection pipe clamp of a pump tower corresponding to an injection pipe where an anti-fluid impact device is located according to an embodiment of the present disclosure;

[0036] FIG13 is an axonometric diagram illustrating the connection between a pump tower base and a pump tower bottom plate provided below a pump tower where an injection pipe containing a fluid impact prevention device according to an embodiment of the present disclosure is located;

[0037] FIG14 is a top view schematically showing the connection between the pump tower base and the pump tower bottom plate provided below the pump tower where the injection pipe of the fluid impact prevention device provided in an embodiment of the present disclosure is located;

[0038] FIG15 is a schematic top view of AA in FIG14;

[0039] FIG16 is an axonometric diagram of a pump tower base provided below the pump tower where the injection pipe where the fluid impact prevention device is located according to an embodiment of the present disclosure;

[0040] FIG17 is a schematic top view of a pump tower base provided below the pump tower where the injection pipe where the fluid impact prevention device is located according to an embodiment of the present disclosure;

[0041] FIG18 is a side view of a pump tower base provided below the pump tower where the injection pipe of the fluid impact prevention device provided by an embodiment of the present disclosure corresponds;

[0042] FIG19 is a schematic central cross-sectional view of a pump tower base provided below the pump tower where the injection pipe of the fluid impact prevention device provided in an embodiment of the present disclosure corresponds;

[0043] FIG20 is an axonometric diagram of a top block of a pump tower base provided below the pump tower where the injection pipe of the fluid impact prevention device provided by an embodiment of the present disclosure corresponds;

[0044] Figure 21 is a top view schematic diagram of the top block of the pump tower base provided below the pump tower corresponding to the injection pipe where the fluid impact prevention device provided by the embodiment of the present disclosure is located.

[0045] Reference numerals 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 support; 18, unloading pump; 19, liquid impact prevention device; 21, first elbow; 22, second elbow; 23, third elbow; 30, pipe clamp component; 31, pipe clamp connecting elbow plate; 32, pipe clamp spacer; 33, pipe clamp sleeve; 40, opening; 41, bottom plate; 42, side wall; 43, surrounding 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, limiting hole; 61, cylinder; 62, connecting ring; 63, connecting enclosure; 64, support pile panel; 65, support pile enclosure; 66, support pile flat plate; 67, horizontal reinforcement plate; 68, support flat plate; 71, vertical support plate; 72, top block panel; 73, top block connecting plate; 74, horizontal support plate; 75, waist-round hole. DETAILED DESCRIPTION

[0046] In order to enable those skilled in the art to better understand the technical solutions of the present disclosure, the present disclosure is described in detail below with reference to the accompanying drawings and specific implementation methods.

[0047] Various aspects and features of the present application are described herein with reference to the accompanying drawings.

[0048] These and other characteristics of the present application will become apparent from the following description of a preferred form of embodiment given as a non-limiting example with reference to the accompanying drawings.

[0049] It should also be understood that although the present application has been described with reference to certain specific examples, those skilled in the art will be able to implement many other equivalent forms of the present application that have the features of the claims and are therefore within the scope of protection defined thereby.

[0050] The above and other aspects, features and advantages of the present application will become more apparent from the following detailed description when taken in conjunction with the accompanying drawings.

[0051] Specific embodiments of the present application will be described below with reference to the accompanying drawings; however, it should be understood that the embodiments described are merely examples of the present application and may be implemented in a variety of ways. Familiar 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 described herein are not intended to be limiting, but rather serve merely as a basis and representative basis for the claims to teach those skilled in the art to use the present application in a variety of ways with substantially any appropriate detailed structure.

[0052] This specification may use the phrases "in one embodiment," "in another embodiment," "in a further embodiment," or "in other embodiments," which may all refer to one or more of the same or different embodiments according to the present application.

[0053] An embodiment of the present disclosure provides a fluid impact prevention device, as shown in Figures 1 to 21. The fluid impact prevention device is provided at the bottom opening 40 of the injection pipe 13 to guide the liquid injected through the injection pipe 13. The injection pipe 13 is vertically arranged near the bottom of the storage tank. The storage tank is specifically used to store liquid natural gas, ethane gas, and other gases. It can be used as a cryogenic liquid cargo storage tank for liquid cargo transport ships or as a cryogenic liquid cargo storage tank for other ships using cryogenic liquid cargo as fuel. The fluid impact prevention device includes:

[0054] A bottom plate 41 is provided below the opening 40 of the injection pipe 13 and has a guide surface formed on a side facing the opening 40. The bottom plate 41 can protect the storage tank from the fluid in the injection tank and falling objects. The bottom plate 41 is specifically provided below the opening 40 of the injection pipe 13 and is spaced apart from the opening 40.

[0055] Two parallel side walls 42, each of which is fixedly connected to the bottom plate 41 at its lower end, and each of which is fixedly connected to the outer side wall 42 at the bottom end of the injection pipe 13 at its upper end via a horizontal fixing plate 44. The side walls 42 serve as the main support for the fluid impact prevention device.

[0056] Two surrounding walls 43 are respectively disposed between the two side walls 42. The two surrounding walls 43 are arranged parallel to 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 surrounding wall 43 structure;

[0057] Among them, at least one wall of the rectangular wall structure formed by the two side walls 42 and the two surrounding walls 43 is provided with a water hole, and the number of walls provided with water holes in the rectangular wall structure, as well as the number and opening size of the water holes are determined based on the flow rate and flow direction of the fluid after being diverted by the guide plate, that is, the flow rate and flow direction of the fluid diversion can be controlled by whether water holes are provided on the side wall 42 or the surrounding wall 43, and by adjusting the opening size of the water holes, so that the fluid injected into the storage tank is deflected and preferably injected in the direction opposite to the equipment component to be protected. At the same time, the sum of the opening cross-sectional areas of all the water holes is greater than the cross-sectional area of ​​the opening 40 of the injection pipe 13.

[0058] In order to be able to guide the injected liquid more quickly, in some embodiments of the present disclosure, the bottom plate 41 is a spherical panel, and the raised side of the spherical panel faces the opening 40 of the injection pipe 13 as a guide surface, the center of the spherical panel is on the vertical axis of the injection pipe 13, and 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 in the horizontal plane, the bottom plate 41 of the spherical panel can make the vertically injected liquid produce a lateral velocity component, thereby 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, thereby protecting the anti-fluid impact device.

[0059] Furthermore, in this embodiment, the radius of the spherical panel is 2 to 4 times the radius of the injection pipe 13. In some embodiments of the present disclosure, the side wall 42 is a flat plate. If a first water flow hole 45 is provided on the side wall 42, the first water flow hole 45 is provided on the side of the side wall 42 close to the bottom plate 41 and is centrally disposed. The upper portion of the first water flow hole 45 is provided in a semi-circular shape and is disposed on the ground to achieve diversion of the injected liquid and facilitate rapid discharge of the fluid.

[0060] 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.

[0061] In the above embodiment, the spherical panel is further provided with a conical protrusion in the middle of the side facing the injection pipe 13, so as to realize the diversion and diversion of the injected liquid through the conical protrusion; if no water hole is provided on at least one wall of the rectangular wall structure formed by the side wall 42 and the surrounding wall 43, then the protrusion provided on the guide surface formed on the side of the opening 40 of the bottom plate 41 facing the injection pipe 13 is provided close to the wall side of the rectangular wall structure where no water hole is provided, and a diversion groove is formed along the protrusion in the direction of the water hole, and the number of the diversion grooves is the same as the number of the water holes provided.

[0062] Specifically, the surrounding wall 43 can be in the form of a semi-enclosing wall, that is, a gap with a height dimension of 50mm-200mm is formed between the upper edge of the surrounding wall 43 and the edge of the opening 40 of the injection pipe 13, so that when the liquid is injected quickly and the liquid cannot flow out quickly through the set water hole, the liquid can flow out from the upper gap of the surrounding wall 43 to avoid clogging the injection pipe 13.

[0063] In some embodiments of the present disclosure, a horizontal fixing plate 44 is located at the top of the side wall 42, and its side facing the injection pipe 13 is an arc-shaped side edge 47. The radius of the arc-shaped side edge 47 is the same as the outer radius of the injection pipe 13, and the horizontal fixing plate 44 is fixed to the outer wall of the injection pipe 13 by welding. The horizontal plane where the horizontal fixing plate 44 is located is higher than the horizontal plane where the opening 40 of the injection pipe 13 is located, and the vertical spacing is 30mm-100mm, thereby facilitating welding of the horizontal fixing plate 44. At the same time, the horizontal fixing plates 44 on the side walls 42 are arranged symmetrically with respect to the injection pipe 13 to effectively fix the fluid impact prevention device to the lower end of the injection pipe 13, prevent the fluid impact prevention device from twisting, and ensure the stability of the device.

[0064] Furthermore, in order to further increase the connection strength between the horizontal fixing plate 44 and the injection pipe 13, the horizontal fixing plate 44 adopts a corner reduction structure on both sides close to the surrounding wall 43, so as to increase the length of the arc-shaped side edge 47 on the side where the horizontal fixing plate 44 is fixedly connected to the injection pipe within a limited space. At the same time, it can also ensure that the length of the side edge where the horizontal fixing plate 44 is fixedly connected to the side wall 42 remains unchanged.

[0065] In some embodiments of the present disclosure, the angle between the two ends of the arc-shaped side edge 47 of each horizontal fixing plate 44 and the line connecting the vertical axis of the injection pipe 13 is 90 degrees to 110 degrees, that is, the angle of the arc-shaped side edge 47 of the horizontal fixing plate 44 around the axis of the injection pipe 13 is 90 degrees to 110 degrees.

[0066] In this embodiment, the distance between the bottom plate 41 and the horizontal fixing plate 44 is 200 mm-400 mm, and the opening 40 of the injection pipe 13 is located between the bottom plate 41 and the horizontal fixing plate 44 .

[0067] In addition, in the above embodiment, the injection pipe 13 is provided on the pump tower. As shown in Figures 6 to 12, the pump tower further includes: a first unloading pipe 11, a second unloading pipe 12, and an emergency unloading pipe 14 arranged vertically, wherein the first unloading pipe 11, the second unloading pipe 12, the injection pipe 13, and the emergency unloading pipe 14 are fixedly connected in sequence by parallel supports to form a prism structure with a quadrilateral cross-section. The four vertical pipes, namely, the first unloading pipe 11, the second unloading pipe 12, the injection pipe 13, and the emergency unloading pipe 14, form a quadrilateral cross-section main frame. That is, the four vertical pipes are connected to the parallel supports to define a quadrilateral cross-section prism.

[0068] At the same time, the first unloading pipe 11 is provided with a first elbow 21 at the middle and lower part in the height direction, and the first elbow 21 is in the plane where the first unloading pipe 11 and the emergency unloading pipe 14 are located; the second unloading pipe 12 is provided with a second elbow 22 at the middle and lower part in the height direction, and the second elbow 22 is in the plane where the second unloading pipe 12 and the emergency unloading pipe 14 are located; the injection pipe 13 is provided with a third elbow 23 at the middle and lower part in the height direction, and the third elbow 23 is in the plane where the injection pipe 13 and the emergency unloading pipe 14 are located; wherein, the portion of the first unloading pipe 11 below the first elbow 21, the portion of the second unloading pipe 12 below the second elbow 22, the portion of the injection pipe 13 below the third elbow 23 and the emergency unloading pipe 14 are located. The area of ​​the quadrilateral cross-section formed by the cargo pipe 14 is 2 to 3 times the area of ​​the quadrilateral cross-section formed by the upper part of the first unloading pipe 11, the upper part of the second unloading pipe 12, the upper part of the injection pipe 13 and the upper part of the emergency unloading pipe 14, so that space for arranging relevant equipment can be formed between the first unloading pipe 11, the second unloading pipe 12, the injection pipe 13 and the emergency unloading pipe 14, that is, through the first elbow 21, the second elbow 22 and the third elbow 23, the space formed by the first unloading pipe 11, the second unloading pipe 12, the injection pipe 13 and the emergency unloading pipe 14 in the lower area of ​​the pump tower is increased, thereby facilitating the installation and arrangement of equipment such as the unloading pump 18, and at the same time, the pump tower has a variable cross-section structure.

[0069] In some embodiments of the present disclosure, the parallel supports are multi-layered, and each layer of parallel supports is connected to four vertically arranged risers to form an annular support on the same horizontal plane, and a diagonal brace 17 is provided between two adjacent layers of parallel supports to resist the torque of the pump tower. By arranging horizontal supports 16 and diagonal braces 17 in the pump tower frame structure, the pump tower is connected into an integral truss structure, thereby effectively resisting the sloshing load and improving the stiffness and torsional resistance of the pump tower.

[0070] Furthermore, since the low-temperature liquid cargo is injected into the storage tank through the injection pipe 13, there may be a temperature difference between the injection pipe 13 and other pump tower components, resulting in asynchronous thermal expansion and contraction. If the injection pipe 13 is connected to the horizontal support 16 and the diagonal support 17 by welding, it will cause greater temperature stress and cause structural safety risks. The injection pipe 13 is fixedly connected to the parallel support by the pipe clamp component 30. The pipe clamp component 30 can move the injection pipe 13 in the vertical direction and limit the movement of the injection pipe 13 in the horizontal direction. The pipe clamp component 30 can There are multiple ones, that is, the injection pipe 13 is connected to a layer of parallel supports 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, wherein the pipe clamp sleeve 33 is concentrically arranged 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 that a distance of at least 10 mm is formed between the pipe clamp sleeve 33 and the injection pipe 13, and a connecting piece is provided between the pipe clamp pad 32 and the pipe clamp sleeve 33 for fixed connection, and the connecting piece can be a bolt or a rivet, etc.

[0071] 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 connection 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 fixedly connected to two horizontal supports 16 in the same layer at the same time. Then, a large-sized pipe clamp connection elbow plate 31 can be set between the two horizontal supports 16, and the large-sized pipe clamp connection elbow plate 31 is fixedly connected to the two horizontal supports 16 and the pipe clamp sleeve 33 at the same time. On the outside of the two horizontal supports 16 away from the large-sized pipe clamp connection elbow plate 31, a smaller-sized pipe clamp connection elbow plate 31 is respectively provided to fix the corresponding horizontal support 16 and the pipe clamp sleeve 33 respectively, thereby improving the stiffness of the connection position between the horizontal support 16 and the pipe clamp sleeve 33 and reducing local stress concentration.

[0072] In addition, in the above embodiment, the position of the pump tower is limited by the pump tower base 50, and the lower end of the pump tower base 50 is fixed to the bottom of the storage tank, and the upper end passes through the pump tower bottom plate 15 and is connected to the pump tower bottom plate 15 through the top block 51 to limit the horizontal displacement of the pump tower. As shown in Figures 13 to 21, the pump tower base 50 also includes a cylinder 60, the lower part of the cylinder 60 is fixedly connected to the bottom wall of the cryogenic liquid cargo storage tank, the middle part of the cylinder 61 is provided with support piles symmetrically arranged about the cylinder 61, the upper part of the cylinder 61 is provided with a connecting panel 63 on the outside of the cylinder 61, and the top block 51 is multiple and symmetrically arranged about the center line of the cylinder 61 in the vertical direction. When the pump tower is limited in position by the pump tower base 50, the upper connecting panel 63 of the cylinder 61 is upwardly passed through the limiting hole 53 opened at the center of the pump tower bottom plate 15 and connected in sequence with the connecting panel 63 to form a frame structure, so that one side of the top block 51 is By connecting the elbow plate 52 and fixing it to the pump tower base plate 15, the other side of the top block 51 is fixed to the connecting panel 63 that has passed upward through the pump tower base plate 15. The position where the top block 51 is connected to the connecting panel 63 is within the middle set area in the vertical direction of the connecting panel 63, and the spacing between the frame structure formed by the connecting panels 63 connected in sequence and the inner side edges of the limiting holes 53 is not greater than 150 mm, that is, the gap between the frame structure formed by the connecting panels 63 connected in sequence and the limiting holes 53 can be 50-150 mm, so that when the pump tower is installed, the above-mentioned arrangement method is adopted to facilitate the pump tower base 50 to pass through the limiting holes 53, thereby realizing rapid positioning and assembly of the pump tower.

[0073] In some embodiments of the present disclosure, each support pile includes two support pile walls 65 arranged in parallel and fixedly connected to the outer wall of the cylinder 61, a support pile panel 64 located at one end of the support pile walls 65 away from the cylinder 61 and fixedly connected to the two support pile walls 65, and a support pile flat plate 66 arranged between the two support pile walls 65 and fixedly connected to the outer wall of the cylinder 61, the support pile panel 64 and the outer wall of the cylinder 61. The support pile walls 65, the support pile panel 64 and the cylinder 61 together form a frame structure that is approximately rectangular.

[0074] In some embodiments of the present disclosure, the connecting panels 63 provided on the upper part of the cylinder 61 are connected into four pieces, arranged vertically, and connected to each other to form a square frame structure. The cylinder 61 can specifically be a cylindrical cylinder or a regular prism cylinder; the top end of the connecting panel 63 is flush with the upper end surface of the cylinder 61, and a supporting plate 68 is provided in the middle of the square frame structure, which is parallel to the bottom of the cryogenic liquid cargo storage tank. The supporting plate 68 is located in the middle area in the height direction of the connecting panel 63, and is arranged vertically or parallel to the connecting panel 63.

[0075] In this embodiment, a plurality of horizontal reinforcing plates 67 are sequentially provided in the cylinder 61 along its height direction from top to bottom, and the plurality of horizontal reinforcing plates 67 include at least horizontal reinforcing plates 67 respectively provided 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 provided 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, further strengthening the overall strength of the supporting 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 61 or an annular plate structure whose outer edge is adapted to the inner side surface of the cylinder 61, and is selected specifically according to the strength requirements of the pump tower base 50, that is, if the cylinder 61 is a cylindrical cylinder, the horizontal reinforcing plate 67 can be a circular flat plate structure or a circular annular plate structure.

[0076] In some embodiments of the present disclosure, after the upper connecting panel 63 of the cylinder 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 the connecting panels 63 connected in sequence, the upper edge of the cylinder 60 is 300mm-500mm higher than the pump body bottom plate, and the connecting panels 63 are all located above the pump body bottom plate.

[0077] In some embodiments of the present disclosure, there are four connecting panels 63, which are enclosed to form a square frame structure; there are four top blocks 51, which correspond to one connecting panel 63 respectively, and each top block 51 is located at the center of the corresponding connecting panel; the top block 51 is fixedly connected to the connecting elbow plate 52 welded and fixed on the pump tower bottom plate 15 by bolts, and the pump tower base 50 limits the pump tower through the top block 51.

[0078] In this embodiment, each top block 51 includes: a top block panel 72, which has a card slot for embedding the top block connecting plate 73 on the side facing the connecting panel 63, and the card slot is opened in the central area of ​​the top block panel 72 so that the top block connecting plate 73 after embedding and installation is in the central area of ​​the top block panel 72. The card slot can make the top block panel 72 and the top block connecting plate 73 tightly connected through the card slot. The top block connecting plate 73 is made of elastic PE material, and after the top block connecting plate 73 is connected to the connecting panel 63, the connection between the top block 51 and the connecting panel 63 can be improved. Tightness; two parallel vertical support plates 71, which are fixed to the side of the top panel 72 away from the connecting panel 63 at intervals, and are arranged perpendicular to the top panel 72. The two vertical support plates 71 are arranged vertically, and each vertical support plate 71 is provided with a waist-shaped hole 75 for fixed connection with the connecting elbow plate 52 (or called "connecting rib"); a horizontal support plate 74, which is arranged between the two vertical support plates 71 and is in the middle area in the height direction of the vertical support plates 71. The horizontal support plate 74 is fixedly connected to the vertical support plates 71 and the top panel 72. Among them, the connecting elbow plate 52 is located at the upper end of the pump tower bottom plate 15 and is interconnected with other supporting components of the pump tower bottom plate 15 by welding. This arrangement can effectively transfer the support reaction force generated by the pump tower base 50 to other supporting components of the pump tower bottom plate 15, avoiding local stress concentration.

[0079] It can be seen from the above technical solution that the anti-fluid impact device provided by the above embodiment of the present disclosure changes the connection type between the anti-fluid impact device and the injection pipe 13. By adopting a symmetrical arrangement of multiple connecting plates, the connection area between the device and the injection pipe 13 is increased, thereby improving the stability and safety of the device; the slot design between the internal components of the device and the injection pipe 13 is eliminated, thereby reducing the installation accuracy requirements and facilitating the rapid installation of the device; the device bottom plate 41 adopts a spherical design, and openings are provided on the surrounding walls 43. This combined design is conducive to the rapid flow of the injected liquid to the surroundings, and can achieve rapid diversion of the injected liquid, avoid liquid accumulation inside the device, and effectively improve the liquid injection efficiency; the flow rate and direction of the fluid diversion can be controlled by whether or not the water hole is set on the device wall 43, and by adjusting the size of the opening, so that the fluid injected into the tank is deflected and preferably injected in the opposite direction of the equipment item to be protected.

[0080] The above embodiments are merely exemplary embodiments of the present disclosure and are not intended to limit the present disclosure. The scope of protection of the present disclosure is defined by the claims. Those skilled in the art may make various modifications or equivalent substitutions to the present disclosure within the essence and scope of protection of the present disclosure, and such modifications or equivalent substitutions shall also be deemed to fall within the scope of protection of the present disclosure.

Claims

1. A fluid impact prevention device, wherein: The fluid impact prevention device is arranged at the bottom opening of the injection pipe to guide the liquid injected through the injection pipe, and the fluid impact prevention device comprises: A bottom plate, which is arranged below the opening of the injection pipe and has a flow guide surface formed on a side facing the opening; Two parallel side walls, the lower end of each side wall is fixedly connected to the bottom plate, and the upper end of each side wall is fixedly connected to the outer side wall of the bottom end of the injection pipe through a horizontal fixing plate; Two surrounding walls, which are respectively arranged between the two side walls to form a rectangular surrounding wall structure together with the two side walls; Among them, at least one wall of the rectangular wall structure formed by the two side walls and the two surrounding walls is provided with a water flow hole, and the number of walls provided with water flow holes in the rectangular wall structure, as well as the number and hole sizes of the water flow holes are determined based on the flow velocity and flow direction of the fluid after being guided by the guide plate, and the sum of the opening cross-sectional areas of all the water flow holes is greater than the cross-sectional area of ​​the injection pipe opening.

2. The fluid impact protection device according to claim 1, wherein: The bottom plate is a spherical panel, and a convex side of the spherical panel faces the opening of the injection pipe as the guide surface, and the center of the spherical panel is located on the vertical axis of the injection pipe.

3. The fluid impact protection device according to claim 2, wherein: The radius of the spherical panel is 2 to 4 times the radius of the injection pipe.

4. The fluid impact protection device according to claim 1, wherein: The side wall is a flat plate. If a first water flow hole is provided on the side wall, the first water flow hole is provided on the side wall close to the bottom plate and is centrally arranged, and the upper portion of the first water flow hole is arranged in a semi-circular shape.

5. The fluid impact protection device according to claim 1, wherein: Both side edges of the surrounding wall are connected to the side walls, and the bottom edge of the surrounding wall is fixedly connected to the bottom plate; If a second water flow hole is provided on the surrounding wall, the second water flow hole is provided on the surrounding wall close to the bottom plate and is centrally arranged in a semi-circular shape.

6. The fluid impact protection device according to claim 1, wherein: A gap with a height dimension of 50mm-200mm is formed between the upper edge of the surrounding wall and the edge of the injection pipe opening.

7. The fluid impact protection device according to claim 1, wherein: The horizontal fixing plate is located at the top of the side wall, and the side edge thereof facing the injection pipe is an arc-shaped side edge, and the radius of the arc-shaped side edge is the same as the outer radius of the injection pipe; The horizontal plane where the horizontal fixing plate is located is higher than the horizontal plane where the opening of the injection pipe is located, and the spacing in the vertical direction is 30mm-100mm.

8. The fluid impact protection device according to claim 7, wherein: The horizontal fixing plate has an angle-cutting structure on both sides close to the surrounding wall to increase the length of the arc-shaped side of the side where the horizontal fixing plate is fixedly connected to the injection pipe.

9. The fluid impact protection device according to claim 8, wherein: The angle between the two ends of the arc-shaped side of each horizontal fixing plate and the line connecting the vertical axis of the injection pipe is 90 degrees to 110 degrees.

10. The fluid impact protection device according to claim 1, wherein: The distance between the bottom plate and the horizontal fixed plate is 200 mm-400 mm, and the opening of the injection pipe is located between the bottom plate and the horizontal fixed plate.

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