A pump tower structure and a liquefied gas storage container

Abstract

This application relates to a pump tower structure and a liquefied gas storage container, and pertains to the technical field of liquefied gas storage tanks. The pump tower structure penetrates through the top wall of the outer tank to connect the inside and outside of the outer tank. The pump tower structure includes a liquid pumping pipe, a buffer pipe, and a fixing plate. The lower end of the liquid pumping pipe penetrates through the top wall of the outer tank to the inside of the outer tank. The buffer pipe is sleeved outside the liquid pumping pipe, and a buffer space is formed between the buffer pipe and the liquid pumping pipe. The fixing plate is arranged at the upper end of the buffer pipe, and the fixing plate protrudes radially from the upper end of the buffer pipe. Among them, the end parts of the liquid pumping pipe are directly or indirectly fixed to the top wall and the bottom wall of the outer tank. The top wall of the outer tank is provided with a clamping block, and the clamping block is clamped with the fixing plate to limit the fixing plate from moving in the vertical direction. The pump tower structure provided by this application can solve the problem that the pump tower in the prior art is prone to damage when impacted by the liquid material in the storage tank.

Description

Technical Field

[0001] The present application relates to the technical fields of a pump tower structure and a liquefied gas storage container, and in particular, to a pump tower structure and a liquefied gas storage tank. Background Art

[0002] A liquefied gas storage tank is a special equipment for storing and transporting liquefied natural gas and liquefied petroleum gas. Among them, when the liquefied gas storage tank is applied to a transport ship, taking a liquefied natural gas (LNG) transport ship as an example, a thin film enclosure system is arranged on the inner wall of the storage tank to achieve shielding and heat insulation effects. At the same time, a pump tower is arranged in the storage tank for injecting and pumping out liquefied natural gas.

[0003] In the prior art, when the pump tower is arranged, it usually extends vertically downward from the concrete outer tank top wall of the storage tank to the bottom of the storage tank, and a pump tower base is arranged on the bottom wall of the storage tank to fix the lower end of the pump tower. However, in the above structure during use, the transport ship will shake due to wind and waves during navigation, and at this time, the liquefied natural gas inside the storage tank will also shake and impact the pump tower, and in severe cases, the pump tower may be damaged, affecting the injection and pumping out of liquefied natural gas.

[0004] Therefore, there is an urgent need to provide a pump tower structure that can solve the problem that the pump tower in the prior art is easily damaged when impacted by the liquid material in the storage tank. Summary of the Invention

[0005] The purpose of the present application is to provide a pump tower structure and a liquefied gas storage tank that can solve the problem that the pump tower in the prior art is easily damaged when impacted by the liquid material in the storage tank.

[0006] To achieve the above purpose, in the first aspect of the present application, a pump tower structure is provided. The pump tower structure penetrates through the top wall of the outer tank to communicate the inside and outside of the outer tank. The pump tower structure includes a pump liquid pipe, a buffer pipe, and a fixing plate. The lower end of the pump liquid pipe penetrates through the top wall of the outer tank to the inside of the outer tank. The buffer pipe is sleeved outside the pump liquid pipe, and a buffer space is formed between the buffer pipe and the pump liquid pipe. The fixing plate is arranged at the upper end of the buffer pipe, and the fixing plate protrudes radially from the upper end of the buffer pipe. Among them, the end parts of the pump liquid pipe are directly or indirectly fixed to the top wall and the bottom wall of the outer tank, and a clamping block is arranged on the top wall of the outer tank, and the clamping block is clamped with the fixing plate to limit the fixing plate from moving in the vertical direction.

[0007] Based on the above embodiments of the present application, by providing a double-layer pump tower structure formed by combining a liquid pumping pipe and a buffer pipe, wherein the liquid pumping pipe is used for pumping and extracting liquefied gas. The buffer pipe arranged outside the liquid pumping pipe is used to protect the liquid pumping pipe. When the liquefied gas carrier shakes due to reasons such as sea waves, the impact force generated by the shaking liquefied gas will directly act on the buffer pipe at this time. Through the buffer space between the buffer pipe and the liquid pumping pipe for separation, it is thus possible to avoid the impact force directly acting on the liquid pumping pipe and causing deformation and damage to the liquid pumping pipe, and further avoid affecting the pumping process of the liquefied gas. Further, by providing that the end of the liquid pumping pipe is directly or indirectly connected to the top wall and the bottom wall of the outer tank body, and the buffer pipe is connected to the top wall of the outer tank body through the clamping between the fixed plate and the clamping block. At this time, when the buffer pipe is subjected to an impact force, the impact force is transmitted to the outer tank body through structures such as the fixed plate and cannot directly act on the liquid pumping pipe, further reducing the impact on the liquid pumping pipe. At the same time, through the clamping and fixing between the fixed plate and the clamping block, the fixed plate and the buffer pipe as a whole can move within a certain range when subjected to an impact, thereby further reducing the possibility of damage to the buffer pipe when it is subjected to an impact. Furthermore, the protection effect on the liquid pumping pipe is improved.

[0008] In some embodiments, a bottom plate is provided at the lower end of the buffer pipe for closing the lower end of the buffer pipe, and the liquid pumping pipe penetrates through the bottom plate.

[0009] Based on the above embodiments of the present application, by providing a bottom plate at the bottom of the buffer pipe to close the bottom of the buffer pipe, it is used to avoid liquefied gas entering the buffer space between the liquid pumping pipe and the buffer pipe to a certain extent.

[0010] In some embodiments, the clamping block includes a connecting portion and a clamping portion. The connecting portion is connected to the top wall in the vertical direction, the clamping portion is connected to the connecting portion, and forms an L-shaped structure with the connecting portion. The fixed plate is clamped between the clamping portion and the top wall.

[0011] Based on the above embodiments of the present application, the clamping block specifically forms an L-shaped structure through the clamping portion and the connecting portion, so as to be clamped with the fixed plate protruding from the buffer pipe to limit the movement of the buffer pipe and the fixed plate as a whole in the vertical direction, and at the same time enable the fixed plate and the buffer pipe to move in the horizontal direction.

[0012] In some embodiments, a buffer strip is provided on the wall surface of the clamping block facing the fixed plate.

[0013] Based on the above embodiments of the present application, by providing a buffer strip on the side of the clamping block facing the fixed plate, it can buffer and protect when the buffer pipe is impacted and moves horizontally to absorb part of the impact force.

[0014] In some embodiments, a reinforcing structure is provided inside the buffer pipe to enhance the strength of the buffer pipe itself. The reinforcing structure includes a first reinforcing rib and a second reinforcing rib. The first reinforcing rib is connected to the inner wall of the buffer pipe and is perpendicular to the axis of the buffer pipe. At least three first reinforcing ribs are interconnected to enclose the outside of the liquid pumping pipe. The second reinforcing rib is arranged along the axial direction of the buffer pipe. At least two groups of first reinforcing ribs are arranged along the axial direction inside the buffer pipe, and both ends of the second reinforcing rib are fixedly connected to different first reinforcing ribs.

[0015] Based on the above embodiments of the present application, by providing a reinforcing structure to enhance the strength of the buffer pipe itself, the impact resistance of the buffer pipe is enhanced. Specifically, by providing the first reinforcing rib, at least three first reinforcing ribs are interconnected to support each other, thereby providing support from the inside of the buffer pipe to enhance the anti-deformation ability of the buffer pipe when dealing with impacts. On the basis of the first reinforcing rib, the second reinforcing rib is further provided, and the second reinforcing rib is arranged along the axial direction of the buffer pipe, thereby enhancing the anti-bending performance of the buffer pipe and enhancing the resistance of the buffer pipe when dealing with the impact of liquefied gas.

[0016] In some embodiments, at least three groups of first reinforcing ribs are arranged along the axial direction inside the buffer pipe, and a second reinforcing rib is connected between any two adjacent first reinforcing ribs, and any two adjacent second reinforcing ribs are arranged in a staggered manner.

[0017] Based on the above embodiments of the present application, by providing multiple groups of first reinforcing ribs, the anti-deformation ability of the buffer pipe can be better enhanced. At this time, the second reinforcing rib connected between two adjacent groups of first reinforcing ribs is divided into multiple shorter second reinforcing ribs. Compared with a single longer second reinforcing rib, the anti-bending performance of the second reinforcing rib is better at this time. At the same time, by arranging any two adjacent second reinforcing ribs in a staggered manner, the buffer pipe can be strengthened along the circumferential direction of the buffer pipe to cope with the impact of liquefied gas in different directions.

[0018] In some embodiments, the pump tower structure includes a liquid injection pipe. The liquid injection pipe passes through the top wall of the outer tank to the inside of the outer tank, and the liquid injection pipe is arranged in the buffer space. The liquid injection pipe penetrates through the bottom plate.

[0019] Based on the above embodiments of the present application, during the use of the pump tower, the liquid pumping pipe is used to pump and extract liquefied gas outwards, and by providing the liquid injection pipe, it can be used to inject liquefied gas into the storage tank. At the same time, other pipeline structures can also be set according to needs in specific use. Further, by arranging the liquid injection pipe in the buffer space between the liquid pumping pipe and the buffer pipe, the liquid injection pipe can also be protected by the buffer pipe outside, thereby avoiding the deformation or damage of the liquid injection pipe due to the impact of liquefied gas to a certain extent and affecting the injection effect.

[0020] In some embodiments, sleeves are fixedly arranged on the liquid injection pipe and the second reinforcing rib, and the liquid injection pipe is arranged inside the sleeve.

[0021] Based on the above embodiments of the present application, by providing a sleeve on the second reinforcing rib, the liquid injection pipe is further fixed. At the same time, the method of providing the sleeve can not only fix the liquid injection pipe to a certain extent, but also leave a certain deformable and movable space to better cope with problems such as the deformation of structures such as the liquid injection pipe at low temperatures and resonance caused by the sloshing of liquefied gas.

[0022] In some embodiments, the pump tower structure includes a base, and the base is connected to the lower end of the liquid pumping pipe to restrict the movement of the liquid pumping pipe in the horizontal direction. The upper end of the base penetrates through the bottom plate, and the bottom plate is fixedly connected to the base.

[0023] Based on the above embodiments of the present application, by providing a base for fixing the lower end of the liquid pumping pipe, and only restricting the movement of the liquid pumping pipe in the horizontal direction during fixation, that is, the liquid pumping pipe can move relative to the base in the vertical direction, so as to leave a certain movable space when the liquid pumping pipe deforms due to low temperature. By connecting the lower end of the bottom plate to the base, it is possible to both fix the lower end of the buffer plate and avoid affecting the liquid pumping pipe. When the buffer pipe is impacted by liquefied gas, the impact force acting on the buffer pipe is transmitted to the base instead of directly to the liquid pumping pipe, thereby reducing the impact on the liquid pumping pipe and enhancing the protection of the liquid pumping pipe.

[0024] According to the second aspect of the present application, a liquefied gas storage tank is provided, which includes an outer tank body, a thin film enclosure system, and the above-mentioned pump tower structure. The thin film enclosure system is arranged on the inner wall of the outer tank, and the pump tower structure penetrates through the top wall of the outer tank to communicate inside and outside the outer tank.

[0025] Based on the above embodiments of the present application, the liquefied gas storage tank provided by the present application includes the above-mentioned pump tower structure. Through the above arrangement, the buffer pipe is sleeved outside the liquid pumping pipe to protect the liquid pumping pipe. When the liquefied gas storage tank shakes and drives the liquefied gas inside to shake, the impact force generated by the shaking of the liquefied gas directly acts on the buffer pipe, avoiding the impact from causing deformation or damage to the liquid pumping pipe and affecting the liquid pumping effect. Thereby enhancing the overall reliability and stability of the pump tower inside the liquefied gas storage tank, and further enhancing the overall practicality of the liquefied gas storage tank.

[0026] Other features and advantages of the present application will be described in detail in the subsequent specific implementation section. BRIEF DESCRIPTION OF THE DRAWINGS

[0027] The drawings are used to provide a further understanding of the present application, and constitute a part of the specification. They are used to explain the present application together with the following specific implementation, but do not constitute a limitation to the present application. In the drawings:

[0028] Figure 1 is a schematic structural diagram of the pump tower structure provided by the embodiment of the present application.

[0029] Figure 2 It is a schematic cross-sectional view of the pump tower structure provided by an embodiment of the present application.

[0030] Figure 3 It is a schematic cross-sectional view of the fixed disk and the clamping block in the pump tower structure provided by an embodiment of the present application.

[0031] Figure 4 It is a schematic sectional view of the pump tower structure provided by an embodiment of the present application.

[0032] Figure 5 It is a schematic structural view of the liquid pumping pipe and the base in the pump tower provided by an embodiment of the present application.

[0033] Figure 6 is Figure 1 an enlarged schematic view of part A in

[0034] 1. Liquid pumping pipe; 2. Buffer pipe; 21. Buffer space; 3. Reinforcing structure; 31. First reinforcing rib; 32. Second reinforcing rib; 4. Liquid injection pipe; 5. Sleeve; 6. Base; 61. Liquid inlet; 7. Man ladder; 8. Fixed disk; 9. Clamping block; 91. Connection part; 92. Clamping part; 93. Buffer strip. Detailed implementation manners

[0035] In order to make the purpose, technical solutions and advantages of the present application clearer, the present application will be further described in detail below with reference to the accompanying drawings and embodiments. It should be understood that the specific embodiments described herein are only used to explain the present application, and are not used to limit the present application.

[0036] To make the purpose, technical solutions and advantages of the embodiments of the present application clearer, the technical solutions in the embodiments of the present application will be clearly and completely described below with reference to the accompanying drawings in the embodiments of the present application. Obviously, the described embodiments are some, but not all, of the embodiments of the present application. Usually, the components of the embodiments of the present application described and shown in the accompanying drawings here can be arranged and designed in various different configurations.

[0037] Therefore, the detailed description of the embodiments of the present application provided in the accompanying drawings below is not intended to limit the scope of the claimed present application, but is only intended to represent the selected embodiments of the present application. All other embodiments obtained by those of ordinary skill in the art based on the embodiments in the present application without creative efforts shall fall within the scope of protection of the present application.

[0038] It should be noted that: similar reference numerals and letters denote similar items in the following drawings. Therefore, once an item is defined in one drawing, it does not need to be further defined and explained in subsequent drawings.

[0039] In the description of this application, it should be noted that, unless otherwise stated, the orientation or positional relationship indicated by terms such as "inner" and "outer" is based on the orientation or positional relationship shown in the drawings, or the orientation or positional relationship in which the products of this application are customarily placed during use. This is only for the convenience of describing this application and simplifying the description, rather than indicating or implying that the device or component referred to must have a specific orientation, be constructed and operated in a specific orientation, and therefore should not be construed as a limitation to this application. In addition, terms such as "first" and "second" are only used for distinguishing descriptions and should not be construed as indicating or implying relative importance.

[0040] In the description of this application, it should also be noted that, unless otherwise clearly specified and limited, the terms "arranged" and "connected" should be understood in a broad sense. For example, it can be a fixed connection, a detachable connection, or an integral connection; it can be directly connected, or indirectly connected through an intermediate medium, and it can be the communication inside two components. For those of ordinary skill in the art, the specific meanings of the above terms in this application can be understood according to specific circumstances.

[0041] Liquefied gas storage tanks are special equipment for storing and transporting liquefied natural gas and liquefied petroleum gas. Among them, when the liquefied gas storage tank is applied to a transport ship, taking a liquefied natural gas (LNG) transport ship as an example, a thin-film enclosure system is arranged on the inner wall of the storage tank to achieve shielding and heat insulation effects. At the same time, a pump tower is arranged inside the storage tank for injecting and pumping out liquefied natural gas.

[0042] In the prior art, when the pump tower is arranged, it usually extends vertically downward from the concrete outer tank top wall of the storage tank to the bottom of the storage tank, and at the same time, a pump tower base is arranged on the bottom wall of the storage tank to fix the lower end of the pump tower. However, in the use of the above structure, when the transport ship sails, it will shake due to wind and waves. At this time, the liquefied natural gas inside the storage tank will also shake accordingly and impact the pump tower, and in severe cases, it may cause damage to the pump tower, affecting the injection and pumping out of liquefied natural gas.

[0043] To solve the above problems in the prior art, according to the first aspect of this application, an embodiment of this application provides a pump tower structure that penetrates through the top wall of the outer tank to communicate the inside and outside of the outer tank. Refer to Figure 1 and Figure 2As shown in the figure, the pump tower structure includes a liquid pumping pipe 1, a buffer pipe 2, and a fixing plate 8. The lower end of the liquid pumping pipe 1 passes through the top wall of the outer tank to the inside of the outer tank. The buffer pipe 2 is sleeved outside the liquid pumping pipe 1, and a buffer space 21 is formed between the buffer pipe 2 and the liquid pumping pipe 1. The fixing plate 8 is arranged at the upper end of the buffer pipe 2, and the fixing plate 8 protrudes radially from the upper end of the buffer pipe 2. Among them, the end parts of the liquid pumping pipe 1 are directly or indirectly fixed to the top wall and the bottom wall of the outer tank. The top wall of the outer tank is provided with a clamping block 9, and the clamping block 9 is clamped with the fixing plate 8 to limit the fixing plate 8 from moving in the vertical direction.

[0044] Based on the above embodiments of the present application, by setting a double-layer pump tower structure formed by combining the liquid pumping pipe 1 and the buffer pipe 2, wherein the liquid pumping pipe 1 is used for pumping and sucking liquid gas. And the buffer pipe 2 arranged outside the liquid pumping pipe 1 is used to protect the liquid pumping pipe 1. When the liquefied gas carrier shakes due to reasons such as sea waves, the impact force generated by the shaking liquefied gas will directly act on the buffer pipe 2 at this time. It is separated by the buffer space 21 between the buffer pipe 2 and the liquid pumping pipe 1, so as to avoid the impact force directly acting on the liquid pumping pipe 1 and causing deformation and damage to the liquid pumping pipe 1, and further avoid affecting the pumping process of the liquefied gas.

[0045] Furthermore, by setting the end part of the liquid pumping pipe 1 to be directly or indirectly connected to the top wall and the bottom wall of the outer tank, and the buffer pipe 2 is connected to the top wall of the outer tank through the clamping between the fixing plate 8 and the clamping block 9. At this time, when the buffer pipe 2 is subjected to an impact force, the impact force is transmitted to the outer tank through structures such as the fixing plate 8 and cannot directly act on the liquid pumping pipe 1, further reducing the impact on the liquid pumping pipe 1. At the same time, through the clamping fixation between the fixing plate 8 and the clamping block 9, the fixing plate 8 and the buffer pipe 2 as a whole can move within a certain range when subjected to an impact, thereby further reducing the possibility of damage to the buffer pipe 2 when it is subjected to an impact. Furthermore, the protection effect on the liquid pumping pipe 1 is improved.

[0046] Specifically, in the present application, the liquid pumping pipe 1 is used for the input and output of liquefied gas. Therefore, in the specific production, processing, and assembly processes, factors such as sealing, corrosion resistance, and strength should be considered. High requirements are imposed on the material and connection process of the liquid pumping pipe 1. The buffer pipe 2 is arranged outside the liquid pumping pipe 1 to protect the liquid pumping pipe 1. Therefore, in the production, processing, and assembly processes, the requirements for aspects such as sealing are relatively low, while the requirements for aspects such as strength are relatively high. Therefore, in the specific production, processing, and assembly processes, the liquid pumping pipe 1 and the buffer pipe 2 can select different materials and assembly methods according to specific usage requirements, and the present application does not make specific restrictions on this.

[0047] In addition, it should be noted that the pump tower structure in this application can be applied to liquefied gas carriers for pumping during the input and output of liquefied gas, specifically including liquefied natural gas carriers and liquefied petroleum gas carriers, etc. Further, after appropriate modifications, the pump tower structure in this application can also be applied to other liquid material carriers. Similarly, by setting the buffer pipe 2 outside the liquid pumping pipe 1, the technical effect of reducing the impact on the liquid pumping pipe 1 when the liquid material sways with the carrier can be achieved. The specific pump tower structure and connection method can be adjusted adaptively according to the actual application conditions, and this application does not make specific limitations in this regard.

[0048] Furthermore, in this application, the buffer pipe 2 is used to buffer and protect the liquid pumping pipe 1 outside the liquid pumping pipe 1. Therefore, compared with the liquid pumping pipe 1, the requirements for the buffer pipe 2 in terms of sealing performance are lower. Even if a small amount of liquefied gas material leaks into the buffer space 21, it will not have too much impact on the buffering effect of the buffer pipe 2. Therefore, in the actual production, processing and assembly process, the buffer pipe 2 can be set as a modular structure, that is, the final overall structure of the buffer pipe 2 is formed by splicing multiple smaller buffer pipe 2 modules. At this time, it is not only convenient for processing and assembly, reducing the production and processing costs, but also convenient for later maintenance and overhaul. During specific production and processing, the buffer pipe 2 can be divided into multiple identical cylindrical structures along the axial direction and then spliced in sequence, or the buffer pipe 2 can be further divided into semi-circular module structures. It can be specifically set according to factors such as production and processing technology, and this application does not make specific limitations in this regard.

[0049] Furthermore, the above-mentioned "the ends of the liquid pumping pipe 1 are directly or indirectly fixed to the top wall and the bottom wall of the outer tank body" in this application means that the liquid pumping pipe 1 is indirectly connected to the top wall and the bottom wall of the outer tank body through other structures. For example, when the lower end of the liquid pumping pipe 1 is fixed, it can be indirectly fixed on the thin film enclosure structure at the bottom of the storage tank through structures such as the base 6, and the thin film enclosure structure is connected to the bottom wall of the outer tank body, so as to realize the indirect fixation of the liquid pumping pipe 1 to the bottom wall of the outer tank body. Similarly, the buffer pipe 2 can also be indirectly fixed to the top wall and the bottom wall of the outer tank body in a similar manner.

[0050] In some embodiments of this application, a bottom plate (not shown) can be provided at the lower end of the buffer pipe 2 to close the lower end of the buffer pipe 2, and the liquid pumping pipe 1 penetrates through the bottom plate.

[0051] Based on the above embodiments of this application, by providing a bottom plate at the bottom of the buffer pipe 2 to close the bottom of the buffer pipe 2, to a certain extent, it can prevent liquefied gas from entering the buffer space 21 between the liquid pumping pipe 1 and the buffer pipe 2.

[0052] In this application, the clamping block 9 can be set to any suitable structure.

[0053] Refer toFigure 3 As shown in [reference], in an exemplary embodiment provided by the present application, the clamping block 9 may include a connecting portion 91 and a clamping portion 92. The connecting portion 91 is connected to the top wall in the vertical direction, and the clamping portion 92 is connected to the connecting portion 91 and forms an L-shaped structure with the connecting portion 91. The fixed disk 8 is clamped between the clamping portion 92 and the top wall.

[0054] Based on the above embodiments of the present application, the clamping block 9 specifically forms an L-shaped structure through the clamping portion 92 and the connecting portion 91, so as to be clamped with the fixed disk 8 protruding from the buffer tube 2, thereby restricting the movement of the buffer tube 2 and the fixed disk 8 as a whole in the vertical direction, while enabling the fixed disk 8 and the buffer tube 2 to move in the horizontal direction.

[0055] Specifically, in actual use, the clamping block 9 may be integrally provided as an annular structure, and may be fixedly formed by splicing multiple semi-annular structures during assembly, so as to facilitate clamping and fixing with the fixed disk 8. Or, in some other embodiments, the clamping block 9 may also be provided as multiple separate block structures, and the multiple block structures are arranged along the circumferential direction and are respectively clamped and fixed with the fixed disk 8.

[0056] Furthermore, in some embodiments of the present application, a buffer strip 93 may also be provided on the wall surface of the clamping block 9 facing the fixed disk 8.

[0057] Based on the above embodiments of the present application, by providing the buffer strip 93 on the side of the clamping block 9 facing the fixed disk 8, buffer protection can be carried out when the buffer tube 2 is impacted and moves horizontally, so as to absorb part of the impact force.

[0058] When specifically setting, the buffer strip 93 may be provided at multiple positions of the clamping block 9. For example, buffer strips 93 are respectively provided on the sides of the connecting portion 91 and the clamping portion 92 facing the fixed disk 8. In some other embodiments of the present application, a buffer strip 93 may also be provided on the side of the fixed disk 8 facing the clamping block 9 along the radial direction. In actual use, the buffer strip 93 may be made of materials such as buffer clay, and may be specifically set according to actual situations, and the present application does not make specific limitations on this.

[0059] Reference Figures 2 to 4 As shown in [reference], in some embodiments of the present application, a strengthening structure 3 may also be provided in the buffer tube 2 to strengthen the strength of the buffer tube 2 itself. The strengthening structure 3 may include a first reinforcing rib 31, and the first reinforcing rib 31 is connected to the inner wall of the buffer tube 2 and is perpendicular to the axis of the buffer tube 2. At least three first reinforcing ribs 31 are connected to each other to enclose the outside of the liquid pumping tube 1.

[0060] Based on the above embodiments of the present application, the strength of the buffer tube 2 itself is strengthened by providing a strengthening structure 3 to enhance the impact resistance of the buffer tube 2. Specifically, by providing the first reinforcing ribs 31, at least three first reinforcing ribs 31 are connected to each other to support each other, thereby providing support from the inside of the buffer tube 2 to enhance the anti-deformation ability of the buffer tube 2 when dealing with impacts.

[0061] Specifically, when three first reinforcing ribs 31 are connected and supported in a group, at this time, the three first reinforcements form a triangular structure, and the triangular structure surrounds the outside of the liquid pumping tube 1 and supports the buffer tube 2 from the inside of the buffer tube 2 to increase the resistance of the buffer tube 2 to impact deformation. When four first reinforcing ribs 31 are in a group, at this time, the four first reinforcements form a square structure and provide support from the inside of the buffer tube 2. Similarly, when the number of each group of first reinforcing ribs 31 is sequentially set to five, six, and so on up to multiple, at this time, multiple first reinforcing ribs 31 are also connected to each other to provide support from the inside of the buffer tube 2.

[0062] Furthermore, as the number of each group of first reinforcing ribs 31 increases, the polygonal structure formed by the connection of multiple first reinforcing ribs 31 becomes closer and closer to a circle, and the number of connection points between the polygonal structure and the inner wall of the buffer tube 2 also increases sequentially, making the overall supporting effect of the first reinforcing ribs 31 on the buffer tube 2 gradually enhanced. However, at this time, the overall size of the first reinforcing ribs 31 also gradually increases, which in turn leads to an increase in the required materials and cost, and at the same time, the deformable space in a low-temperature environment also gradually decreases. Therefore, in the actual production, processing, and assembly processes, the appropriate number of first reinforcing ribs 31 can be selected according to factors such as the strength requirements of the buffer tube 2, and the present application does not make specific limitations on this.

[0063] Reference Figure 2 and Figure 4 As shown in

[0064] In some other embodiments of the present application, the strengthening structure 3 further includes a second reinforcing rib 32, and the second reinforcing rib 32 is arranged along the axial direction of the buffer tube 2. There are at least two groups of first reinforcing ribs 31 arranged along the axial direction inside the buffer tube 2, and both ends of the second reinforcing rib 32 are fixedly connected to different first reinforcing ribs 31.

[0065] Specifically, through the cooperation of the second reinforcing rib 32 and the first reinforcing rib 31, while enhancing the impact and deformation resistance of the buffer tube 2, its anti-bending performance is strengthened. When specifically setting, various connection methods including welding can be used to fix between the first reinforcing rib 31 and the second reinforcing rib 32, and specifically, it can be set according to factors such as connection strength requirements. This application does not make specific limitations on this.

[0066] Reference Figure 2 and Figure 4 As shown in the reference and, in some embodiments of this application, at least three groups of first reinforcing ribs 31 can be axially arranged in the buffer tube 2. A second reinforcing rib 32 is connected between any two adjacent first reinforcing ribs 31, and any two adjacent second reinforcing ribs 32 are arranged in a staggered manner.

[0067] Based on the above embodiments of this application, by setting multiple groups of first reinforcing ribs 31, the anti-deformation ability of the buffer tube 2 can be better strengthened. At this time, the second reinforcing rib 32 connected between two adjacent groups of first reinforcing ribs 31 is divided into multiple shorter second reinforcing ribs 32. Compared with a single longer second reinforcing rib 32, the anti-bending performance of the second reinforcing rib 32 is better at this time. At the same time, by setting any two adjacent second reinforcing ribs 32 in a staggered manner, the buffer tube 2 can be strengthened along the circumferential direction of the buffer tube 2 to cope with liquefied gas impacts in different directions.

[0068] Specifically, taking the setting of three groups of first reinforcing ribs 31, and three first reinforcing ribs 31 in each group as an example, at this time, a second reinforcing rib 32 is connected between the first group of first reinforcing ribs 31 and the second group of first reinforcing ribs 31 from top to bottom, and then a second reinforcing rib 32 is connected between the second group of first reinforcing ribs 31 and the third group of first reinforcing ribs 31. And there is an included angle between the axes of the two second reinforcing ribs 32 and the axis of the buffer tube 2. That is, the two second reinforcing ribs 32 are respectively located at different positions in the circumferential direction of the buffer tube 2, so as to be able to strengthen the resistance effect of the buffer tube 2 against impacts in different directions.

[0069] In addition, it should also be noted that the specific shapes of the first reinforcing rib 31 and the second reinforcing rib 32 are not limited in this application. During the actual production, processing and assembly, the cross-sections of the first reinforcing rib 31 and the second reinforcing rib 32 can be set to any suitable shape. For example, the cross-sections of the first reinforcing rib 31 and the second reinforcing rib 32 can be set to be circular, and at this time, it can ensure that both have high strength. Or, the cross-sections of the first reinforcing rib 31 and the second reinforcing rib 32 can also be set to be triangular or cross-shaped. At this time, a certain strength can still be ensured, and at the same time, compared with the circular structure, materials can be saved and the cost can be reduced. It can be specifically set according to actual processing requirements. This application does not make specific limitations on this.

[0070] Further, in some other embodiments of the present application, the pump tower structure may further include a buffer module. The buffer module is disposed between the buffer pipe 2 and the liquid pumping pipe 1 and is used to absorb the impact force directly acting on the buffer pipe 2. Specifically, during the actual production, processing, and assembly process, when the first reinforcing rib 31 encloses the outside of the liquid pumping pipe 1, buffer materials such as buffer resin can be provided between the first reinforcing rib 31 and the liquid pumping pipe 1. The specific material can be selected according to factors such as the temperature inside the storage tank, and the present application does not make specific limitations thereto.

[0071] Refer to Figure 2 and Figure 4 As shown in, in some embodiments of the present application, the pump tower structure includes a liquid injection pipe 4. The liquid injection pipe 4 passes through the top wall of the outer tank to the inside of the outer tank, and the liquid injection pipe 4 is disposed in the buffer space 21. The liquid injection pipe 4 penetrates through the bottom plate.

[0072] Based on the above embodiments of the present application, during the use of the pump tower, the liquid pumping pipe 1 is used to pump and extract liquefied gas outwards, and by providing the liquid injection pipe 4, it can be used to inject liquefied gas into the storage tank. At the same time, other pipeline structures can also be provided according to needs during specific use. Further, by disposing the liquid injection pipe 4 in the buffer space 21 between the liquid pumping pipe 1 and the buffer pipe 2, the liquid injection pipe 4 can also be protected by the buffer pipe 2 from the outside, thereby avoiding the deformation or damage of the liquid injection pipe 4 due to the impact of liquefied gas to a certain extent and affecting the liquid injection effect.

[0073] Specifically, when the pump tower structure is in use, in addition to the liquid pumping pipe 1 and the liquid injection pipe 4, other pipeline structures can also be provided according to requirements, such as a liquid level measuring pipe. Specifically, it can be set according to factors such as actual functional requirements, and the present application does not make specific limitations thereto.

[0074] Refer to Figure 4 As shown in, in some embodiments of the present application, a sleeve 5 is fixedly provided on the liquid injection pipe 4 and the second reinforcing rib 32, and the liquid injection pipe 4 is disposed inside the sleeve 5.

[0075] Based on the above embodiments of the present application, by providing the sleeve 5 on the second reinforcing rib 32, the liquid injection pipe 4 is further fixed. At the same time, the method of providing the sleeve 5 can not only fix the liquid injection pipe 4 to a certain extent, but also leave a certain deformable and movable space to better cope with problems such as the deformation of structures such as the liquid injection pipe 4 at low temperatures and resonance caused by the sloshing of liquefied gas.

[0076] Specifically, during the setting and assembly of the sleeve 5, the sleeve 5 is sleeved outside the liquid injection pipe 4 and there is a certain gap between the sleeve 5 and the liquid injection pipe 4. At this time, the sleeve 5 only needs to limit the movement of the liquid injection pipe 4 in the horizontal direction, and the movement of the liquid injection pipe 4 in the vertical direction is restricted by the connection between the liquid injection pipe 4 and the top wall of the outer tank and other structures.

[0077] Further, at this time, the sleeve 5 can be provided with a slit. For example, the sleeve 5 is set as a three-quarter ring structure or a two-thirds ring structure. At this time, it can not only ensure the position limitation of the liquid injection pipe 4, but also leave a certain deformable space for the sleeve 5 to cope with the deformation of the sleeve 5 in a low-temperature environment. At the same time, it can also save materials and reduce costs.

[0078] In addition, it should also be understood that only the connection and fixation method between the liquid injection pipe 4 and the second reinforcing rib 32 is given in the above embodiments of the present application. When other pipeline structures such as a liquid measuring pipe are also provided in the buffer space 21, the sleeve 5 can also be provided for fixation in the same way. At the same time, the size of the sleeve 5 can be set corresponding to the size of the pipeline, and the present application does not make specific limitations on this.

[0079] Reference Figure 5 As shown in , in some embodiments of the present application, the pump tower structure includes a base 6, and the base 6 is connected to the lower end of the liquid pumping pipe 1 to limit the movement of the liquid pumping pipe 1 in the horizontal direction.

[0080] Based on the above embodiments of the present application, by providing the base 6 for fixing the lower end of the liquid pumping pipe 1, the indirect fixation between the liquid pumping pipe 1 and the bottom of the storage tank is realized. And when fixing, only the movement of the liquid pumping pipe 1 in the horizontal direction is restricted, that is, the liquid pumping pipe 1 can move relative to the base 6 in the vertical direction, so that a certain movable space can be left when the liquid pumping pipe 1 deforms due to low temperature.

[0081] Specifically, in the embodiments of the present application, the base 6 can be set to any suitable structure. Any suitable base 6 structure in the prior art can be selected in specific use. At the same time, the connection and fixation method between the base 6 and the liquid pumping pipe 1 can also be selected in any suitable fixation method. Since the present application does not involve the improvement of the structure of the base 6, it will not be elaborated here.

[0082] Reference Figure 5 As shown in , in some embodiments of the present application, the upper end of the base 6 can penetrate the bottom plate, and the bottom plate is fixedly connected to the base 6.

[0083] Based on the above embodiments of the present application, by connecting the lower end of the bottom plate to the base 6, the fixation of the lower end of the buffer pipe 2 can be realized, and the influence on the liquid pumping pipe 1 can be avoided. When the buffer pipe 2 is impacted by liquefied gas, the impact force acting on the buffer pipe 2 is transmitted to the base 6 instead of directly transmitted to the liquid pumping pipe 1, thereby reducing the impact on the liquid pumping pipe 1 and enhancing the protection of the liquid pumping pipe 1.

[0084] Specifically, the base 6 is connected to the liquid pumping pipe 1. The lower end of the liquid pumping pipe 1 is inserted into the base 6 to fix the horizontal movement of the liquid pumping pipe 1. At the same time, a liquid inlet 61 is provided on the side of the base 6, which serves as the inlet for liquefied gas during pumping. At this time, when the bottom plate is fixed to the base 6, the fixed position should be higher than the position of the liquid inlet 61, that is, it can ensure the fixation between the bottom plate and the buffer pipe 2 and the base 6, and can also avoid blocking the liquid inlet 61 and affecting the pumping process. When specifically connecting, the bottom plate and the base 6 can be connected and fixed by welding or other means.

[0085] In addition, it should also be noted that the pump tower structure in this application is not limited to the above parts. In specific use, refer to Figure 6 As shown in, in order to facilitate the maintenance of the pump tower and the inside of the liquefied gas storage tank, a man ladder 7 structure can also be provided on the pump tower structure. The man ladder 7 structure can be arranged outside the buffer pipe 2.

[0086] According to the second aspect of the present application, a liquefied gas storage tank is provided. The liquefied gas storage tank includes an outer tank body, a thin film enclosure system, and the above-mentioned pump tower structure. The thin film enclosure system is arranged on the inner wall of the outer tank body, and the pump tower structure passes through the top wall of the outer tank body to communicate the inside and outside of the outer tank body.

[0087] Based on the above embodiments of the present application, the liquefied gas storage tank provided by the present application includes the above-mentioned pump tower structure. Through the above settings, the buffer pipe 2 is sleeved outside the liquid pumping pipe 1 to protect the liquid pumping pipe 1. When the liquefied gas storage tank shakes and drives the liquefied gas inside to shake, the impact force generated by the shaking of the liquefied gas directly acts on the buffer pipe 2, avoiding the deformation or damage of the liquid pumping pipe 1 caused by the impact and affecting the pumping effect. Thus, the overall reliability and stability of the pump tower structure in the liquefied gas storage tank are improved, and further the overall practicality of the liquefied gas storage tank is improved.

[0088] Specifically, when the pump tower structure is arranged in the liquefied gas storage tank, the bottom of the pump tower structure needs to extend to the bottom of the storage tank to facilitate pumping. At this time, structures such as the base 6 need to cooperate with the thin film enclosure structure of the bottom wall of the storage tank to ensure stable and reliable fixation between the base 6 and the bottom wall of the storage tank, and to avoid excessive influence on the sealing and heat insulation effects of the thin film enclosure system. Similarly, a matching structure, such as a pipe sleeve support, also needs to be provided between the pump tower structure and the heat insulation ceiling of the top wall of the storage tank. By setting the matching structure, the sealing and heat insulation effects at the contact position between the liquid pumping pipe 1 and other structures and the heat insulation ceiling are strengthened.

[0089] The preferred embodiments of the present application have been described in detail above with reference to the accompanying drawings. However, the present application is not limited to the specific details in the above embodiments. Within the scope of the technical concept of the present application, various simple modifications can be made to the technical solutions of the present application, and these simple modifications all belong to the protection scope of the present application.

[0090] In addition, it should be noted that, in the above specific embodiments, the various specific technical features described can be combined in any suitable manner without contradiction. To avoid unnecessary repetition, this application will not separately describe various possible combination methods.

[0091] In addition, any combinations can be made among the various different embodiments of this application, as long as they do not violate the idea of this application, and they should also be regarded as the content disclosed in this application.

Claims

1. A pump tower structure that penetrates through the top wall of the outer tank to communicate the inside and outside of the outer tank, characterized in that, The pump tower structure includes: A liquid pumping pipe, the lower end of which passes through the top wall of the outer tank to the inside of the outer tank; A buffer pipe, sleeved outside the liquid pumping pipe, and a buffer space is formed between the buffer pipe and the liquid pumping pipe; and, A fixing plate, arranged at the upper end of the buffer pipe, and the fixing plate protrudes radially from the upper end of the buffer pipe; Wherein, the end parts of the liquid pumping pipe are directly or indirectly fixed to the top wall and the bottom wall of the outer tank, a clamping block is arranged on the top wall of the outer tank, and the clamping block is clamped with the fixing plate to limit the vertical movement of the fixing plate; The clamping block includes a connecting part and a clamping part, the connecting part is vertically connected to the top wall, the clamping part is connected to the connecting part, and forms an L-shaped structure with the connecting part; The fixing plate is clamped between the clamping part and the top wall; A buffer strip is arranged on the wall surface of the clamping block facing the fixing plate.

2. The pump tower structure according to claim 1, characterized in that, A bottom plate is arranged at the lower end of the buffer pipe to close the lower end of the buffer pipe, and the liquid pumping pipe penetrates through the bottom plate.

3. The pump tower structure according to claim 2, wherein A strengthening structure is arranged inside the buffer pipe to strengthen the strength of the buffer pipe itself; The strengthening structure includes a first strengthening rib and a second strengthening rib, the first strengthening rib is connected to the inner wall of the buffer pipe and perpendicular to the axis of the buffer pipe, and at least three of the first strengthening ribs are connected to enclose the outside of the liquid pumping pipe; The second strengthening rib is arranged along the axial direction of the buffer pipe, at least two groups of the first strengthening ribs are arranged along the axial direction inside the buffer pipe, and both ends of the second strengthening rib are fixedly connected to different first strengthening ribs.

4. The pump tower structure according to claim 3, characterized in that, At least three groups of the first strengthening ribs are arranged along the axial direction inside the buffer pipe, the second strengthening rib is connected between any two adjacent first strengthening ribs, and any two adjacent second strengthening ribs are arranged in a staggered manner.

5. The pump tower structure according to claim 3, characterized in that, The pump tower structure includes a liquid injection pipe, the liquid injection pipe passes through the top wall of the outer tank to the inside of the outer tank, and the liquid injection pipe is arranged in the buffer space; The liquid injection pipe penetrates through the bottom plate.

6. The pump tower structure according to claim 5, wherein, Sleeves are fixedly arranged on the liquid injection pipe and the second strengthening rib, and the liquid injection pipe is arranged inside the sleeve.

7. The pump tower structure according to claim 2, characterized in that, The pump tower structure includes a base, the base is connected to the lower end of the liquid pumping pipe to limit the horizontal movement of the liquid pumping pipe; The upper end of the base penetrates through the bottom plate, and the bottom plate is fixedly connected to the base.

8. A liquefied gas storage tank, characterized in that, The liquefied gas storage tank includes: An outer tank; A thin film enclosure system, arranged on the inner wall of the outer tank; and, The pump tower structure according to any one of claims 1-7, the pump tower structure passes through the top wall of the outer tank to communicate the inside and outside of the outer tank.

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