Low-temperature liquid cargo storage tank and its packing block processing and installation method

Abstract

The application discloses a low-temperature liquid cargo storage tank and a processing and mounting method of a filling block thereof, and belongs to the technical field of low-temperature storage tank equipment. The storage tank is composed of a bearing wall, a secondary heat insulation layer, a secondary sealing layer, a primary heat insulation layer and a primary sealing layer, the primary sealing layer is a primary corrugated plate protruding inward, and the primary heat insulation layer and the secondary heat insulation layer are respectively assembled by corresponding heat insulation modules. Adjacent primary heat insulation modules are fixed to the secondary heat insulation module through primary anchor members, four corner cut angles of the primary heat insulation modules jointly enclose an anchor space for accommodating the primary anchor members, and a filling block is arranged in the space. The filling block is composed of a rigid top plate, a support plate and heat insulation blocks, the two heat insulation blocks are symmetrically arranged on the two sides of the support plate and respectively abut against a second abutting surface of the support plate and a first abutting surface of the top plate, the periphery of the heat insulation block is flush with or extends outward from the periphery of the top plate, and a containing hole for accommodating the primary anchor member is arranged at the bottom of the filling block. The application has good structural support and heat insulation effect, the storage tank is stable in operation, and the processing and mounting process of the filling block is matched, so that the processing precision and assembly fault tolerance are high.

Description

Technical Field

[0001] This invention belongs to the technical field of cryogenic storage tank equipment, specifically relating to a cryogenic liquid cargo storage tank and its packing block processing and installation method. Background Technology

[0002] Cryogenic liquid cargo storage tanks are the core equipment for storing cryogenic liquid energy media. To ensure the storage safety of cryogenic media and reduce cold loss, existing cryogenic liquid cargo storage tanks generally adopt a multi-layer composite structure, which consists of a load-bearing wall, a secondary insulation layer, a secondary sealing layer, a primary insulation layer, and a primary sealing layer from the outside to the inside. The multi-layer insulation and sealing structure achieves the functions of cold preservation and leakage prevention.

[0003] Currently, the mainstream cryogenic storage tank insulation layer in the industry adopts a modular assembly structure. The main insulation layer is composed of multiple main insulation modules. The four corners of adjacent main insulation modules are chamfered to form an anchoring space. The main insulation modules and secondary insulation modules are fixedly connected by main anchors. Cryogenic liquid cargo itself has an extremely low temperature, and there is a huge temperature difference between the inside of the storage tank and the outside. The gaps in the anchoring space will form a cold energy conduction channel, causing the cold energy inside the tank to continuously leak outward. This not only aggravates the evaporation loss of cryogenic liquid cargo and increases storage and transportation costs, but also causes frost, condensation, or even freezing damage to the external components of the storage tank, affecting the overall structural stability and operational safety of the storage tank.

[0004] To ensure the overall cold insulation effect of the insulation layer, it is necessary to install filler blocks in the anchoring space for sealing. Existing traditional filler blocks are mostly made of single foam insulation material or flexible insulation material, which have at least the following defects in actual use and assembly: the filler blocks made of foam insulation material or flexible insulation material have low structural strength and are prone to compression deformation under low temperature conditions, resulting in a decrease in insulation effect. At the same time, they cannot stably support the top main corrugated plate.

[0005] Therefore, there is an urgent need for a low-temperature liquid cargo storage tank filling structure with optimized structure, strong adaptability, and convenient processing, as well as its supporting technology. Summary of the Invention

[0006] The purpose of this invention is to address the shortcomings of existing technologies by providing a method for processing and installing a cryogenic liquid cargo storage tank and its packing blocks. This method aims to at least partially solve the problems of poor insulation and low support strength of traditional packing blocks, achieve efficient insulation and sealing of the anchoring space, ensure stable support for the main corrugated plate, improve the overall insulation and sealing performance of the cryogenic storage tank, simplify processing procedures, reduce assembly errors, and enhance on-site installation adaptability.

[0007] To achieve the above objectives, the present invention provides the following technical solution:

[0008] In a first aspect, the present invention provides a cryogenic liquid cargo storage tank, comprising a support wall and a tank wall, wherein the tank wall is located inside the support wall and is supported by the support wall, and the tank wall comprises, from the outside to the inside, a secondary insulation layer, a secondary sealing layer, a primary insulation layer and a primary sealing layer, wherein the primary sealing layer is in contact with the liquid cargo; the primary insulation layer comprises a plurality of primary insulation modules, the secondary insulation layer comprises a plurality of secondary insulation modules, and the primary sealing layer comprises a plurality of primary corrugated plates, wherein the corrugations on the primary corrugated plates protrude toward the interior of the cryogenic liquid cargo storage tank.

[0009] The adjacent main insulation modules are fixed together to the secondary insulation module by main anchors. The four corners of the main insulation module are provided with chamfers, and the chamfers at the four corners of the four adjacent main insulation modules together enclose an anchoring space to accommodate the main anchors.

[0010] A filling block is provided within the anchoring space. The filling block includes a top plate, a support plate, and a heat insulation block. The top plate and the support plate are both rigid plates, and the heat insulation block is made of heat-insulating material. The top plate includes a first contact surface, and the support plate includes two opposing second contact surfaces, which are perpendicular to the first contact surface. The two heat insulation blocks are symmetrically arranged on both sides of the support plate and are connected to the first contact surface of the top plate, and respectively contact the two second contact surfaces of the support plate. The periphery of the heat insulation block coincides with the periphery of the top plate or partially extends beyond the periphery of the top plate. The bottom of the filling block is provided with a receiving hole for accommodating the main anchor.

[0011] Furthermore, the receiving hole includes a first receiving groove, which is located at the bottom of the support plate.

[0012] Furthermore, the receiving hole may also include two second receiving grooves, which are respectively located at the bottom of the two heat insulation blocks. The width of the support plate is smaller than the maximum diameter of the portion of the main anchor extending into the anchoring space. The first receiving groove and the two second receiving grooves together enclose the receiving hole to accommodate the main anchor.

[0013] It adapts to the opening requirements of support plates of different thicknesses. When the support plate is thick enough, the main anchor can be accommodated by opening the first receiving groove in the support plate. When the support plate is not thick enough, the support plate and the heat insulation block are used to form a complete receiving hole by slotting, which makes the structure more adaptable.

[0014] Furthermore, the support plate has at least one first gap, which is parallel to the first contact surface of the top plate and extends from one edge of the plate towards the center of the plate, with the extension length of the first gap exceeding the center of the plate; the support plate also has at least one second gap, which is parallel to the first contact surface of the top plate and extends from the opposite edge of the plate towards the center of the plate, with the extension length of the second gap exceeding the center of the plate; the first gap and the second gap are staggered on the support plate.

[0015] Furthermore, the heat insulation block is provided with at least one third gap, the third gap being parallel to the first contact surface of the top plate, and the third gap extending from one side edge of the heat insulation block toward the center of the heat insulation block, the extension length of the third gap exceeding the center of the heat insulation block; the heat insulation block is provided with at least one fourth gap, the fourth gap being parallel to the first contact surface of the top plate, and the fourth gap extending from the opposite side edge of the heat insulation block toward the center of the heat insulation block, the extension length of the fourth gap exceeding the center of the heat insulation block; the third gap is correspondingly arranged to the first gap, and the fourth gap is correspondingly arranged to the second gap.

[0016] The heat insulation block is provided with a third gap and a fourth gap, which are respectively set to correspond to the first gap and the second gap, so as to realize the synchronous deformation buffer of the support plate and the heat insulation block.

[0017] Furthermore, the main anchor includes a screw, a portion of which extends into the receiving hole at the bottom of the filling block, and the distance between the top of the screw and the bottom of the receiving hole is greater than a preset installation adjustment distance.

[0018] Furthermore, the main insulation module or the secondary insulation module includes a polymer foam layer, and the insulation block is made of low-density polymer foam material, the density of which is less than 80% of the density of the polymer foam layer of the main insulation module or the secondary insulation module. While ensuring the insulation effect, the hardness of the insulation block is reduced, making it easier to cut and adapt on site.

[0019] Secondly, the present invention provides two methods for processing stopper blocks for processing stopper blocks for cryogenic liquid cargo storage tanks as described above:

[0020] The first method for processing packing blocks includes the following steps:

[0021] S1. Obtain the top plate and the heat insulation block to be processed, and install the heat insulation block to be processed onto the first mating surface of the top plate;

[0022] S2. Obtain a support plate, and process a first gap and a second gap that are misaligned on the plate body of the support plate;

[0023] S3. A groove is machined in the middle of the pre-fixed heat insulation block to be processed. The groove extends from the edge of the heat insulation block to the first mating surface of the top plate. The width of the groove is greater than or equal to the thickness of the support plate.

[0024] S4. The support plate with the first and second gaps processed is embedded into the groove, so that the second contact surfaces on both sides of the support plate are in contact with the heat insulation block.

[0025] S5. The receiving hole for accommodating the main anchor is integrally machined on the bottom of the assembled heat insulation block and the support plate to complete the overall machining of the filling block.

[0026] The second method for processing packing blocks includes the following steps:

[0027] S6. Obtain the top plate and the heat insulation block to be processed, and install the heat insulation block to be processed onto the first mating surface of the top plate;

[0028] S7. A circular hole for accommodating the main anchor is machined at the bottom of the heat insulation block to be processed;

[0029] S8. Obtain a support plate, and process a first gap and a second gap that are misaligned on the plate body of the support plate; process a first receiving groove to accommodate the main anchor at the bottom of the support plate.

[0030] S9. A groove is machined in the middle of the heat insulation block to be processed. The groove extends from the edge of the heat insulation block to the first mating surface of the top plate. The width of the groove is greater than or equal to the thickness of the support plate. After the groove is machined, the circular hole at the bottom of the heat insulation block is divided into two symmetrical second receiving grooves.

[0031] S10. The support plate with the first and second gaps processed is embedded into the groove to complete the overall processing of the filling block.

[0032] Both processing methods abandon the traditional process of separate processing and subsequent bonding, reduce the number of independent parts, avoid dimensional errors in opening and grooving during separate processing, and greatly improve the overall processing accuracy and structural integrity of the filling block.

[0033] Thirdly, the present invention provides a method for installing a stopper block for assembling a stopper block in a cryogenic liquid cargo storage tank as described above, the method comprising the following steps:

[0034] Compare the overall dimensions of the filling block with the dimensions of the anchoring space enclosed by the corners of the four adjacent main insulation modules;

[0035] If the size of the insulation block is larger than the size of the anchoring space, the periphery of the insulation block is cut until the insulation block can be installed into the anchoring space and the periphery of the insulation block is in contact with the polymer foam layer of the main insulation module.

[0036] If the dimensions of the top plate and the insulation block are both larger than the dimensions of the anchoring space, then the periphery of the top plate and the insulation block are cut simultaneously until the top plate and the insulation block can be installed into the anchoring space, and the periphery of the insulation block is in contact with the polymer foam layer of the main insulation module.

[0037] If the top surface of the plug block is higher than the top surface of the adjacent main insulation module, then the bottom of the plug block is cut until the top surface of the plug block is level with the top surface of the adjacent main insulation module.

[0038] Finally, the modified and adapted plugging block is installed into the anchoring space, so that the top surface of several main insulation modules and the plugging block becomes a complete plane to stably support the main corrugated plate of the main sealing layer.

[0039] This invention places the support plate in the center, which can achieve uniform force distribution and avoid the need to cut the rigid support plate due to dimensional deviations. Only a softer heat insulation block needs to be cut, which greatly reduces the difficulty of installation and debugging.

[0040] Compared with the prior art, the present invention has the following beneficial technical effects:

[0041] 1. The filling block of this invention adopts a composite structure of a rigid top plate, a centrally located rigid support plate, and a low-density insulation block. Compared with traditional pure foam filling blocks, it significantly improves the overall structural rigidity, ensures the flatness of the corrugated plate support plane, and effectively improves the stability of the tank sealing structure.

[0042] 2. By setting staggered extension gaps on the support plate and insulation block, the packing block has a controllable compression margin. During pressure and low-temperature deformation, the gaps can self-compress, reducing the overall height of the packing block, avoiding rigid corrugated plates, preventing the corrugated plates from bending, cracking, and deforming, effectively avoiding the risk of tank seal failure, and improving equipment operation safety.

[0043] 3. The two processing methods designed in this invention eliminate the need for separately processing multiple component parts before bonding and assembling, significantly reducing the number of parts and simplifying the processing steps. By using integrated grooving and integrated forming for opening, the dimensional deviation problems caused by separate processing are avoided, effectively controlling the processing accuracy of the receiving holes and gaps, improving the assembly consistency of the filling blocks, and reducing production and processing costs.

[0044] 4. On the one hand, the accommodating hole has a reserved installation adjustment distance, and the height dimension can be corrected by cutting the bottom of the filling block without damaging the top plate, thus preserving the structural support strength of the top plate; on the other hand, the support plate is centrally arranged, and when there is a size mismatch, only a soft, low-density heat insulation block needs to be cut, without cutting the rigid support plate. The adjustment is convenient and highly adaptable, and it can be adapted to anchoring spaces of different sizes, greatly reducing the difficulty of on-site installation. Attached Figure Description

[0045] To better understand the above and other objects, features, advantages, and functions of the present invention, reference can be made to the preferred embodiments shown in the accompanying drawings. The same reference numerals in the drawings refer to the same parts. Those skilled in the art should understand that the drawings are intended to schematically illustrate preferred embodiments of the invention and do not limit the scope of the invention in any way; the parts in the drawings are not drawn to scale.

[0046] Figure 1 This is a schematic diagram of the assembly state of four adjacent main insulation modules according to an embodiment of the present invention.

[0047] Figure 2 This is a schematic diagram of a packing block structure according to an embodiment of the present invention;

[0048] Figure 3 This is a schematic diagram of the assembly state of the filling block and the main anchor in an embodiment of the present invention;

[0049] Figure 4 This is a schematic diagram of a packing block structure according to an embodiment of the present invention, showing the receiving hole at the bottom of the packing block;

[0050] Figure 5 This is a schematic diagram of the cross-sectional structure of a support plate according to an embodiment of the present invention, showing the first gap and the second gap on the support plate body;

[0051] Figure 6 This is a schematic diagram of the assembly state of the filling block and the main anchor in another embodiment of the present invention, showing the third and fourth gaps on the heat insulation block.

[0052] Explanation of reference numerals in the attached drawings: 1: Main insulation layer; 11: Main insulation module; 12: Main anchor; 121: Screw; 13: Anchoring space; 20: Filler block; 21: Top plate; 211: First mating surface; 22: Support plate; 221: Second mating surface; 23: Insulation block; 24: Receiving hole; 241: First receiving groove; 242: Second receiving groove; 31: First gap; 32: Second gap; 41: Third gap; 42: Fourth gap. Detailed Implementation

[0053] Now, with reference to the accompanying drawings, specific embodiments of the present invention will be described in detail. It should be noted that the embodiments described herein are merely preferred embodiments of the present invention, and those skilled in the art can conceive of other ways to implement the present invention based on these preferred embodiments, and such other ways also fall within the scope of the present invention.

[0054] This invention discloses a cryogenic liquid cargo storage tank and its packing block processing and installation method, mainly to solve the technical defects of poor thermal insulation and low support strength of the existing packing structure at the anchoring position of cryogenic liquid cargo storage tanks. The following is a detailed explanation... Figures 1 to 6 The specific structure, processing technology and installation technology of the present invention are described in detail.

[0055] Example 1

[0056] This invention provides a cryogenic liquid cargo storage tank. The cryogenic liquid cargo storage tank includes a support wall and a tank wall located inside the support wall. The tank wall is supported by the support wall as a whole. The tank wall is stacked with a secondary insulation layer, a secondary sealing layer, a main insulation layer 1, and a main sealing layer from the outside to the inside. The innermost main sealing layer is in direct contact with the cryogenic liquid cargo inside the storage tank, thereby achieving the sealed storage of cryogenic media.

[0057] like Figure 1 As shown, the main insulation layer 1 is modularly spliced ​​from multiple rectangular main insulation modules 11, the secondary insulation layer is spliced ​​from multiple secondary insulation modules, and the main sealing layer is spliced ​​from several main corrugated plates, with the corrugated structure of the main corrugated plates protruding towards the inside of the storage tank.

[0058] The four corners of the four adjacent main insulation modules 11 are all provided with chamfered structures. The chamfered corners of the four main insulation modules 11 cooperate with each other to form a square anchoring space 13. The main anchor 12 is installed inside the anchoring space 13. The four adjacent main insulation modules 11 are locked and fixed to the secondary insulation module by the main anchor 12, so as to realize the overall fixed assembly of the main insulation layer 1.

[0059] In another embodiment, the four corners of the four adjacent main insulation modules 11 can be provided with quarter-circular chamfered structures. The chamfered corners of the four main insulation modules 11 cooperate with each other to jointly enclose a circular anchoring space 13. The shape of the anchoring space is not limited here, and it can be square, circular or other shapes, which can be selected by those skilled in the art according to the actual situation and needs.

[0060] To fill the assembly gaps in the anchoring space 13, ensure overall thermal insulation performance, and support the top main corrugated plate, this invention embeds a filling block 20 inside the anchoring space 13. For example... Figure 2 and Figure 3As shown, the filling block 20 is a composite prefabricated structure, specifically including a top plate 21, a support plate 22, and two symmetrically arranged heat insulation blocks 23. The top plate 21 and the support plate 22 are both made of rigid hard plates, which have high support strength. The heat insulation blocks 23 are made of lightweight heat insulation materials, which have excellent cold insulation and heat insulation performance.

[0061] The bottom of the top plate 21 is a flat first bonding surface 211. The support plate 22 is arranged vertically, with two relatively parallel second bonding surfaces 221 on its left and right sides. The second bonding surfaces 221 are perpendicular to the first bonding surfaces 211. Two heat insulation blocks 23 are symmetrically attached to the left and right sides of the support plate 22. The inner surface of each heat insulation block 23 is tightly bonded to the second bonding surface 221 of the support plate 22 or fixed in other ways. At the same time, the top of the heat insulation block 23 is tightly attached to and fixedly connected to the first bonding surface 211 of the top plate 21, forming an integral filling structure.

[0062] In this embodiment, the peripheral dimension of the insulation block 23 is equal to the peripheral dimension of the top plate 21. It should be noted that the insulation effect of the filling block is mainly provided by the insulation block 23, so the outer surface of the insulation block 23 needs to be tightly bonded to the polymer foam layer of the adjacent main insulation module 11 or secondary insulation module to achieve a better sealing and insulation effect. Therefore, in another embodiment, the peripheral dimension of the insulation block 23 is larger than the peripheral dimension of the top plate 21, leaving a compression or cutting allowance to accommodate situations where the filling block is too large to fit into the anchoring space 13. In this case, only the peripheral dimension of the insulation block 23 can be cut, without cutting the peripheral dimension of the top plate 21. The insulation block 23 is made of lightweight insulation material, which is easy to machine, reducing production costs.

[0063] like Figure 3 and Figure 4 As shown, the bottom of the filling block 20 is provided with a receiving hole 24 for avoiding and accommodating the main anchor 12, ensuring that the filling block 20 can be completely embedded in the anchoring space 13 without assembly interference.

[0064] When the thickness of the support plate 22 is large enough to meet the opening diameter requirements, the receiving hole 24 only includes the first receiving groove 241 opened at the bottom of the support plate 22. The main anchor 12 can be received and assembled through a single groove structure, which is simple in structure and easy to process.

[0065] When the thickness of the support plate 22 is small and cannot be slotted separately to meet assembly requirements, the receiving hole 24 includes both a first receiving groove 241 and two second receiving grooves 242, which are symmetrically opened at the bottom of the two heat insulation blocks 23. The width of the support plate 22 is smaller than the maximum outer diameter of the portion of the main anchor 12 extending into the anchoring space 13, allowing the first receiving groove 241 at the bottom of the support plate 22 to interlock with the second receiving grooves 242 at the bottom of the heat insulation blocks 23 on both sides, forming a complete circular or near-circular receiving hole 24. This adapts to the assembly requirements of large-sized main anchors 12, demonstrating strong structural adaptability.

[0066] like Figure 5 As shown, to enable the filling block 20 to have adaptive buffering deformation capability and avoid rigid top corrugated plate deformation and damage, a first gap 31 and a second gap 32 are staggered on the support plate 22. Both the first gap 31 and the second gap 32 are parallel to the first contact surface 211 of the top plate 21. The first gap 31 extends from one edge of the support plate 22 towards the center of the plate, with an extension length exceeding the center position. The second gap 32 extends from the opposite edge of the support plate 22 towards the center of the plate, also with an extension length exceeding the center position. The first gap 31 and the second gap 32 are staggered in vertical height and do not communicate with each other. This structure allows the support plate 22 to achieve adaptive height adjustment through micro-compression of the gaps when subjected to top pressure and low-temperature shrinkage force, reserving deformation buffering margin.

[0067] like Figure 6 As shown, to ensure that the heat insulation block 23 and the support plate 22 deform synchronously and are subjected to uniform force, a third gap 41 and a fourth gap 42 are correspondingly provided on both heat insulation blocks 23. The third gap 41 and the fourth gap 42 are also parallel to the first contact surface 211. The third gap 41 extends from one edge of the heat insulation block 23 toward the center and exceeds the center position of the heat insulation block 23, corresponding to the first gap 31 of the support plate 22, forming a connected overall gap; the fourth gap 42 extends from the opposite edge of the heat insulation block 23 toward the center and exceeds the center position of the heat insulation block 23, corresponding to the second gap 32 of the support plate 22, forming a connected overall gap. Through the corresponding gap setting, the filling block 20 is compressed and deformed synchronously as a whole, and the buffering effect is uniform and stable.

[0068] Furthermore, the third gap 41 on the heat insulation block 23 corresponds to the first gap 31 on the support plate 22, and the fourth gap 42 on the heat insulation block 23 corresponds to the second gap 32 on the support plate 22. During processing, the third gap 41 and the first gap 31 can be formed together, and the fourth gap 42 and the second gap 32 can be formed together, which facilitates processing and reduces production and processing costs.

[0069] Recombined Figure 3 and Figure 4 As shown, the main anchor 12 includes a vertically arranged screw 121. The upper end of the screw 121 extends into the receiving hole 24 at the bottom of the filling block 20, and a preset installation adjustment distance is reserved between the top of the screw 121 and the bottom of the receiving hole 24. This installation adjustment distance setting allows for height adaptation by simply cutting and grinding the bottom of the filling block 20 when the filling block 20 is too high, facilitating assembly and adjustment. At the same time, it eliminates the need to cut the top plate 21, fully preserving the structural thickness and support strength of the top plate 21, and ensuring the support stability of the filling block 20.

[0070] In this embodiment, both the main insulation module 11 and the secondary insulation module include a polymer foam layer. The insulation block 23 of the filler block 20 is made of low-density polymer foam material, such as polyurethane foam. The density of the insulation block 23 is less than 80% of the density of the polymer foam layer of the main insulation module 11 and the secondary insulation module. Low-density foam material has lower hardness and is easier to cut and grind, which greatly facilitates on-site size adaptation processing, while also having excellent low-temperature insulation performance.

[0071] Example 2

[0072] This embodiment is a processing technology for the stopper blocks adapted to the above-mentioned cryogenic liquid cargo storage tanks. It is suitable for processing stopper blocks with slit structures and combined receiving holes, and specifically includes the following processing steps:

[0073] S1. Obtain the top plate and the heat insulation block to be processed, and install the heat insulation block to be processed onto the first mating surface of the top plate. In step S1 of this embodiment, the heat insulation block to be processed has a rectangular hexahedral structure, and its peripheral dimensions are the same as those of the top plate. The heat insulation block to be processed and the top plate are fixed by adhesive bonding.

[0074] S2. Take a rigid support plate blank and use cutting and milling processes to process the first and second gaps that are misaligned on the support plate body to ensure that the gap extension length and parallelism meet the design requirements, forming a support plate structure that can adapt to deformation.

[0075] S3. A vertical groove is made in the middle of the pre-fixed heat insulation block to be processed. The groove extends upward from the bottom edge of the heat insulation block to the first mating surface of the top plate. The width of the groove is greater than or equal to the thickness of the support plate to ensure that the support plate can be embedded and installed without gaps.

[0076] S4. Embed the processed support plate into the groove of the heat insulation block from bottom to top, so that the top of the support plate is in contact with the first contact surface of the top plate, and the second contact surfaces on both sides of the support plate are tightly in contact with and fixed to the heat insulation block.

[0077] S5. Using an integrated milling process, the receiving holes for accommodating the main anchor are integrally formed on the bottom of the assembled support plate and the bottom of the two heat insulation blocks, thus completing the overall machining of the filling block.

[0078] This processing method adopts a process of first assembling the whole and then opening and grooving in one piece, abandoning the traditional method of processing and then bonding the parts. This greatly reduces the number of scattered parts, avoids the problems of dimensional deviation and assembly misalignment caused by processing parts, and results in higher processing accuracy and stronger overall structure of the filling block.

[0079] Example 3

[0080] This embodiment discloses another processing technology for packing blocks, the specific steps of which are as follows:

[0081] S6. Obtain the top plate and the heat insulation block to be processed, and fix the heat insulation block to be processed on the first mating surface of the top plate to complete the pre-assembly. In step S6 of this embodiment, the heat insulation block to be processed is a rectangular hexahedral structure, and its peripheral dimensions are the same as those of the top plate. The heat insulation block to be processed and the top plate are fixed by adhesive bonding.

[0082] S7. A complete circular hole is machined at the center of the bottom of the pre-assembled heat insulation block to be processed, for use in the subsequent forming of the main anchor's clearance structure.

[0083] S8. Process the support plate separately, and mill the misaligned first gap and second gap on the support plate body. At the same time, process the first receiving groove at the center position of the bottom of the support plate.

[0084] S9. A vertical groove is milled in the middle of the heat insulation block to be processed. The groove runs through the upper and lower end faces of the heat insulation block. The width of the groove is adapted to the thickness of the support plate. During the groove processing, the pre-processed round hole at the bottom of the heat insulation block will be symmetrically divided into two independent second receiving grooves. The two second receiving grooves are symmetrically distributed on both sides of the groove.

[0085] S10. Embed the processed support plate into the groove of the heat insulation block, so that the first receiving groove at the bottom of the support plate is aligned with the second receiving groove at the bottom of the heat insulation blocks on both sides, forming a complete receiving hole, thus completing the processing and preparation of the filling block.

[0086] This processing method offers high assembly and splicing precision, good consistency in batch production, and effectively solves the problems of large errors and high assembly difficulty in traditional split processing.

[0087] Example 4

[0088] This embodiment features a dedicated on-site installation process for the aforementioned filler blocks, adapting to dimensional deviations at the construction site, offering high installation tolerance and convenient debugging. The specific steps are as follows:

[0089] First, the overall external dimensions of the precast filling block and the internal dimensions of the anchoring space formed by the four main insulation modules were measured and compared, and targeted adjustments were made according to the type of dimensional deviation.

[0090] If the outer dimensions of the insulation block are larger than the dimensions of the anchoring space, only the outer periphery of the insulation block is cut and polished until the insulation block can be smoothly embedded into the anchoring space, and the outer end face of the insulation block is tightly bonded to the polymer foam layer of the main insulation module without gaps.

[0091] If the overall dimensions of the top plate and the insulation block are larger than the anchoring space, the edges of the top plate and the insulation block are simultaneously lightly cut and polished to achieve overall size adaptation and ensure assembly fit.

[0092] If the top surface of the filler block is higher than the top surface of the adjacent main insulation module after the filler block is fully embedded, only the bottom of the filler block is cut and polished. Using the installation adjustment allowance reserved at the bottom of the receiving hole, the overall height of the filler block is reduced until the top surface of the filler block is flush with the top surface of the main insulation module without damaging the top plate support structure.

[0093] Finally, the adjusted and adapted filling blocks are precisely embedded into the anchoring space, so that the filling blocks and the top surfaces of the main insulation modules around them form a flat and continuous support plane, providing uniform and stable overall support for the main corrugated plate of the upper main sealing layer.

[0094] In this installation method, since the support plate is centrally located inside the filling block, there is no need to cut the rigid support plate during the installation and adjustment process. Only a soft and easy-to-grind low-density heat insulation block needs to be cut. This ensures the structural support strength of the filling block and greatly reduces the difficulty of on-site installation and debugging. It is more convenient to assemble and debug than when the support plate is installed on the edge of the top plate, and has strong adaptability.

[0095] The above description of various embodiments of the present invention is provided for illustrative purposes to a person skilled in the art. It is not intended to limit the invention to a single disclosed embodiment. As taught above, those skilled in the art will understand various alternatives and variations of the invention. Therefore, although some alternative embodiments have been specifically described, those skilled in the art will understand or relatively easily develop other embodiments. The present invention is intended to include all alternatives, modifications, and variations of the invention described herein, as well as other embodiments falling within the spirit and scope of the invention described above.

Claims

1. A cryogenic liquid cargo storage tank, the cryogenic liquid cargo storage tank comprising a support wall and a tank wall, the tank wall being located inside the support wall and supported by the support wall, the tank wall comprising, from the outside to the inside, a secondary insulation layer, a secondary sealing layer, a primary insulation layer and a primary sealing layer, the primary sealing layer being in contact with the liquid cargo; the primary insulation layer (1) comprising a plurality of primary insulation modules (11), the secondary insulation layer comprising a plurality of secondary insulation modules, the primary sealing layer comprising a plurality of primary corrugated plates, the corrugations on the primary corrugated plates protruding towards the interior of the cryogenic liquid cargo storage tank; characterized in that, The adjacent main insulation modules (11) are fixed together on the secondary insulation module by the main anchor (12). The four corners of the main insulation module (11) are provided with chamfers. The chamfers at the corners of the four adjacent main insulation modules (11) together enclose and form an anchoring space (13) to accommodate the main anchor. An anchoring space (13) is provided with a filling block (20), which includes a top plate (21), a support plate (22), and a heat insulation block (23). The top plate (21) and the support plate (22) are both rigid plates, and the heat insulation block (23) is a heat insulation material. The top plate (21) includes a first bonding surface (211), and the support plate (22) includes two opposing second bonding surfaces (221). The second bonding surfaces (221) and the first bonding surfaces (211) are connected. Vertically, two heat insulation blocks (23) are symmetrically arranged on both sides of the support plate (22) and connected to the first contact surface (211) of the top plate (21), and respectively contacting the two second contact surfaces (221) of the support plate (22); the periphery of the heat insulation block (23) coincides with the periphery of the top plate (21), or partially extends beyond the periphery of the top plate (21); the bottom of the filling block (20) is provided with a receiving hole (24) for accommodating the main anchor (12).

2. The cryogenic liquid cargo storage tank according to claim 1, characterized in that, The receiving hole (24) includes a first receiving groove (241), which is located at the bottom of the support plate (22).

3. The cryogenic liquid cargo storage tank according to claim 2, characterized in that, The receiving hole (24) further includes two second receiving grooves (242), which are respectively located at the bottom of the two heat insulation blocks (23). The width of the support plate (22) is smaller than the maximum diameter of the part of the main anchor (12) that extends into the anchoring space (13). The first receiving groove (241) and the two second receiving grooves (242) together enclose the receiving hole (24) to accommodate the main anchor (12).

4. The cryogenic liquid cargo storage tank according to claim 1, characterized in that, The support plate (22) has at least one first gap (31) on its body. The first gap (31) is parallel to the first mating surface (211) of the top plate (21), and the first gap (31) extends from one side edge of the plate to the middle of the plate. The extension length of the first gap (31) exceeds the middle of the plate. The support plate (22) has at least one second gap (32) on its body. The second gap (32) is parallel to the first mating surface (211) of the top plate (21), and the second gap (32) extends from the opposite edge of the plate to the middle of the plate. The extension length of the second gap (32) exceeds the middle of the plate. The first gap (31) and the second gap (32) are offset on the support plate (22).

5. The cryogenic liquid cargo storage tank according to claim 4, characterized in that, The heat insulation block (23) is provided with at least one third gap (41), the third gap (41) is parallel to the first contact surface of the top plate, and the third gap (41) extends from one side edge of the heat insulation block (23) toward the middle of the heat insulation block (23), and the extension length of the third gap (41) exceeds the middle of the heat insulation block (23); The heat insulation block (23) is provided with at least one fourth gap (42), the fourth gap (42) is parallel to the first mating surface (211) of the top plate (21), and the fourth gap (42) extends from the opposite edge of the heat insulation block (23) toward the middle of the heat insulation block (23), and the extension length of the fourth gap (42) exceeds the middle of the heat insulation block (23); The third gap (41) is provided in correspondence with the first gap (31), and the fourth gap (42) is provided in correspondence with the second gap (32).

6. The cryogenic liquid cargo storage tank according to claim 1, characterized in that, The main anchor (12) includes a screw (121) that extends into the receiving hole (24) at the bottom of the filling block (20), and the distance between the top of the screw (121) and the bottom of the receiving hole (24) is greater than a preset installation adjustment distance.

7. The cryogenic liquid cargo storage tank according to claim 1, characterized in that, The main insulation module (11) or the secondary insulation module includes a polymer foam layer, and the insulation block (23) is a low-density polymer foam material with a density less than 80% of the density of the polymer foam layer of the main insulation module (11) or the secondary insulation module.

8. A method for processing a filler block, characterized in that, A method for processing a stopper block in a cryogenic liquid cargo storage tank as described in any one of claims 4-7, the method comprising the following steps: S1. Obtain the top plate and the heat insulation block to be processed, and install the heat insulation block to be processed onto the first mating surface of the top plate; S2. Obtain a support plate, and process a first gap and a second gap that are misaligned on the plate body of the support plate; S3. A groove is machined in the middle of the pre-fixed heat insulation block to be processed. The groove extends from the edge of the heat insulation block to the first mating surface of the top plate. The width of the groove is greater than or equal to the thickness of the support plate. S4. The support plate with the first and second gaps processed is embedded into the groove, so that the second contact surfaces on both sides of the support plate are in contact with the heat insulation block. S5. The receiving hole for accommodating the main anchor is integrally machined on the bottom of the assembled heat insulation block and the support plate to complete the overall machining of the filling block.

9. A method for processing a filler block, characterized in that, A method for processing a stopper block in a cryogenic liquid cargo storage tank as described in any one of claims 4-7, the method comprising the following steps: S6. Obtain the top plate and the heat insulation block to be processed, and install the heat insulation block to be processed onto the first mating surface of the top plate; S7. A circular hole for accommodating the main anchor is machined at the bottom of the heat insulation block to be processed; S8. Obtain a support plate, and process a first gap and a second gap that are misaligned on the plate body of the support plate; process a first receiving groove to accommodate the main anchor at the bottom of the support plate. S9. A groove is machined in the middle of the heat insulation block to be processed. The groove extends from the edge of the heat insulation block to the first mating surface of the top plate. The width of the groove is greater than or equal to the thickness of the support plate. After the groove is machined, the circular hole at the bottom of the heat insulation block is divided into two symmetrical second receiving grooves. S10. The support plate with the first and second gaps processed is embedded into the groove to complete the overall processing of the filling block.

10. A method for installing a packing block, characterized in that, For installing a stopper block in a cryogenic liquid cargo storage tank as described in any one of claims 4-7, the stopper block installation method includes the following steps: Compare the dimensions of the filling block with the dimensions of the anchoring space at the corners of the four adjacent main insulation modules; If the size of the insulation block is larger than the size of the anchoring space, the periphery of the insulation block is cut until the insulation block can be installed into the anchoring space and the periphery of the insulation block is in contact with the polymer foam layer of the main insulation module. If the dimensions of the top plate and the insulation block are both larger than the dimensions of the anchoring space, then the periphery of the top plate and the insulation block are cut simultaneously until the top plate and the insulation block can be installed into the anchoring space, and the periphery of the insulation block is in contact with the polymer foam layer of the main insulation module. If the top surface of the plug block is higher than the top surface of the adjacent main insulation module, then the bottom of the plug block is cut until the top surface of the plug block is level with the top surface of the adjacent main insulation module. The modified and adapted plugging block is installed into the anchoring space, so that the top surface of the main insulation modules and the plugging block becomes a complete plane to support the main sealing layer.

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