Thin film tank supporting structure and thin film tank

Abstract

The embodiment of the invention provides a thin film can supporting structure and a thin film can, and the thin film can supporting structure comprises a first supporting plate fixed on the outer surface of an inner can of the thin film can; the second supporting plate is fixed on the inner surface of the outer tank of the thin film tank and is opposite to the first supporting plate; the supporting assembly is located between the first supporting plate and the second supporting plate, connected with the first supporting plate and the second supporting plate and used for forming a separation cavity between the first supporting plate and the second supporting plate; and the thermal insulation material is filled in the separation cavity. The thin film tank supporting structure is uniform in force transmission, good in heat preservation effect and easy to prepare and assemble.

Description

Technical Field

[0001] The embodiments of the present invention relate to the field of low-temperature storage technology, and in particular to a film tank support structure and a film tank. Background Art

[0002] LNG storage tanks, which are responsible for storage tasks in liquefied natural gas (LNG) receiving stations, have the longest construction period, the most advanced technology, and the most difficulties during the construction process, and have always been managed as the critical path of the entire project.

[0003] At present, the LNG cryogenic storage tanks commonly used in the world mainly include four types of tanks: single-capacity tanks, double-capacity tanks, full-capacity tanks and membrane tanks. Among them, the full-capacity tank has the best safety and the largest domestic construction scale. As of now, the tank with the largest net volume in the world is a 270,000-cubic-meter tank under construction. However, in the face of the trend of large-scale development of storage tanks, the full-capacity tank will be restricted by the 9% nickel steel inner tank plate and seismic design. In contrast, the membrane inner tank volume of the membrane tank has no theoretical limit, and a larger volume can be designed than the full-capacity tank. Moreover, the membrane tank has obvious advantages in saving steel, reducing costs, shortening construction period, reducing welding engineering, and prefabricated modular construction off-site. It can adapt to different above-ground and underground storage tank forms, meet the requirements of different site conditions, safety and environmental protection conditions, and the membrane tank is also more advantageous in terms of volume and materials.

[0004] However, the cold-keeping performance of this type of storage tank and the stress condition of the annular space structure, especially the cold-keeping of the annular space, are crucial to ensure the safe and efficient operation of the storage tank. Summary of the invention

[0005] The invention provides a film tank supporting structure and a film tank which have uniform force transmission, good heat preservation effect and are easy to prepare and assemble.

[0006] In order to solve the above technical problems, an embodiment of the present invention provides a membrane tank support structure, comprising:

[0007] A first support plate is fixed on the outer surface of the inner tank of the film tank;

[0008] A second support plate, fixed on the inner surface of the outer tank of the film tank and opposite to the first support plate;

[0009] a support assembly, located between the first support plate and the second support plate, and connected to the first support plate and the second support plate respectively, for forming a compartment between the first support plate and the second support plate; and

[0010] The heat-insulating material is filled in the compartment.

[0011] In some embodiments, the first support plate is made of non-metallic material, and a metal connector is provided on the first support plate. The metal connector is used to connect to the metal inner tank to fix the first support plate on the inner tank.

[0012] In some embodiments, the metal connecting part is a metal embedded part embedded in the first support plate, and the first support plate is welded and fixed to the inner tank through the metal embedded part.

[0013] In some embodiments, at least one first metal embedded part is embedded in the first support plate at intervals, and at least one second metal embedded part is located between two adjacent first metal embedded parts. The first metal embedded part and the second metal embedded part have different shapes, wherein the first metal embedded part is a long strip.

[0014] In some embodiments, the second support plate is made of non-metallic material, and the second support plate is fixed to the outer tank by a sealant.

[0015] In some embodiments, a coating for improving the air tightness of the outer tank is coated on the inner surface of the outer tank.

[0016] In some embodiments, the support assembly includes multiple support columns, and multiple connecting holes are respectively opened on the side opposite to the first support plate and the second support plate. The multiple connecting holes are at least arranged at the top corners and the center of the first support plate and the second support plate, and the multiple support columns are respectively connected to the first support plate and the second support plate through the respective connecting holes.

[0017] In some embodiments, the first support plate and the second support plate are wooden plywood;

[0018] The thermal insulation material is a bulk material with low thermal conductivity and high thermal insulation performance, and the bulk material includes at least one or more of expanded perlite and glass microspheres.

[0019] In some embodiments, there are multiple first support plates, and the multiple first support plates cover the outer surface of the inner tank. There are multiple second support plates, and the multiple second support plates cover the inner surface of the outer tank. The support structure and the thermal insulation material are provided between the first support plates and the second support plates at corresponding positions.

[0020] Another embodiment of the present invention also provides a film tank, including an outer tank, an inner tank, and a film tank support structure as described in any of the above embodiments, which is located between the outer tank and the inner tank and is respectively connected to the outer tank and the inner tank.

[0021] Based on the disclosure of the above embodiments, it can be known that the beneficial effects of the embodiments of the present invention include that the inner tank of the film tank can be connected to the outer tank by setting a first support plate fixed on the outer surface of the inner tank of the film tank, a second support plate fixed on the inner surface of the outer tank of the film tank and opposite to the first support plate, a support assembly located between the first support plate and the second support plate and connected to the first support plate and the second support plate respectively, and a heat-insulating material filled in the said compartment, and the inner tank of the film tank can be connected to the outer tank, and an annular space structure can be established between the two. The structure can not only support the inner tank and the outer tank to maintain a stable relative position, but also can evenly transfer the liquid pressure in the tank to the outer tank, avoiding local stress concentration and causing safety hazards to the film tank. In addition, the present application can effectively reduce the heat transfer between the film tank and the outside by filling the heat-insulating material, avoid temperature loss of the medium in the tank, and ensure stable storage and transportation of liquid cargo in the tank.

[0022] Other features and advantages of the present application will be described in the following description, and partly become apparent from the description, or be understood by practicing the present application. The purpose and other advantages of the present application can be realized and obtained by the structures specifically pointed out in the written description, claims, and drawings.

[0023] The technical solution of the present application is further described in detail below through the accompanying drawings and embodiments. BRIEF DESCRIPTION OF THE DRAWINGS

[0024] In order to more clearly illustrate the specific implementation methods of the present invention or the technical solutions in the prior art, the drawings required for use in the specific implementation methods or the description of the prior art will be briefly introduced below. Obviously, the drawings in the following description are some implementation methods of the present invention. For ordinary technicians in this field, other drawings can be obtained based on these drawings without paying creative work.

[0025] Figure 1 It is a structural schematic diagram of the membrane tank support structure in an embodiment of the present invention.

[0026] Figure 2 It is a partial structural schematic diagram of the membrane tank support structure in an embodiment of the present invention.

[0027] Figure 3 It is a partial structural schematic diagram of the membrane tank support structure in an embodiment of the present invention.

[0028] Reference numerals:

[0029] 1-first support plate; 2-metal connector; 3-support assembly; 4-insulation material; 5-second support plate; 6-sealant DETAILED DESCRIPTION

[0030] The specific embodiments of the present invention are described in detail below with reference to the accompanying drawings, but are not intended to limit the present invention.

[0031] It should be understood that various modifications may be made to the embodiments disclosed herein. Therefore, the following description should not be considered as limiting, but merely as an example of an embodiment. Other modifications within the scope of the present disclosure will occur to those skilled in the art.

[0032] The accompanying drawings, which are incorporated in and constitute a part of the specification, illustrate embodiments of the present disclosure and, together with the general description of the present disclosure given above and the detailed description of the embodiments given below, serve to explain the principles of the present disclosure.

[0033] These and other characteristics of the invention will become apparent from the following description of a preferred form of embodiment given as a non-limiting example, with reference to the accompanying drawings.

[0034] It should also be understood that, although the invention has been described with reference to some specific examples, those skilled in the art will be able to realize many other equivalent forms of the invention that have the characteristics recited in the claims and are therefore within the scope of protection defined thereby.

[0035] The above and other aspects, features and advantages of the present disclosure will become more apparent from the following detailed description when taken in conjunction with the accompanying drawings.

[0036] Specific embodiments of the present disclosure are described hereinafter with reference to the accompanying drawings; however, it should be understood that the disclosed embodiments are merely examples of the present disclosure, which may be implemented in a variety of ways. Well-known and / or repeated functions and structures are not described in detail to avoid obscuring the present disclosure with unnecessary or redundant details. Therefore, the specific structural and functional details disclosed herein are not intended to be limiting, but merely serve as a basis and representative basis for the claims to teach those skilled in the art to use the present disclosure in a variety of ways with substantially any suitable detailed structure.

[0037] This specification may use the phrases "in one embodiment," "in another embodiment," "in a further embodiment," or "in other embodiments," all of which may refer to one or more of the same or different embodiments according to the present disclosure.

[0038] The embodiments of the present invention are described in detail below with reference to the accompanying drawings.

[0039] like Figure 1 As shown, an embodiment of the present invention provides a membrane tank support structure, comprising:

[0040] A first support plate 1 is fixed on the outer surface of the inner tank of the film tank;

[0041] A second support plate 5, fixed on the inner surface of the outer tank of the film tank and opposite to the first support plate 1;

[0042] a support assembly 3, located between the first support plate 1 and the second support plate 5, and connected to the first support plate 1 and the second support plate 5, respectively, for forming a compartment between the first support plate 1 and the second support plate 5; and

[0043] The heat-insulating material 4 is filled in the compartment.

[0044] The support structure in this embodiment is used to connect and support the inner tank and the outer tank in the limiting film tank, so that the inner tank and the outer tank are separated by the support structure, and a compartment for filling the thermal insulation material 4 is formed, so that a thermal insulation layer can be formed between the first support plate 1 and the second support plate 5, and at the same time, a stress conduction structure is formed that can transfer the stress of the inner tank to the outer tank.

[0045] Exemplarily, in this embodiment, there are multiple first support plates 1, and multiple first support plates 1 cover the outer surface of the inner tank. There are multiple second support plates 5, and multiple second support plates 5 cover the inner surface of the outer tank. The support structure and the insulation material 4 are provided between the first support plates 1 and the second support plates 5 at corresponding positions. The first support plate 1 can be an annular plate (the plate body is arc-shaped), or a non-annular plate body, and the plate body is also arc-shaped, referred to as an arc-shaped plate. Of course, it can also be a plate body of other shapes, which can be determined according to the shape of the film tank. Taking the film tank as a cylindrical shape as an example, when the first support plate 1 is an annular plate, the sizes of the multiple first support plates 1 can be the same or different, and the specific needs are to match the size and shape of the inner tank. Multiple first support plates 1 can be put on the outside of the inner tank in sequence to cover the entire outer surface of the inner tank. When the first support plate 1 is an arc-shaped plate, multiple first support plates 1 can be spliced ​​to cover the outer surface of the inner tank. When the film tank is in other shapes, such as a cube, the first support plate 1 can be set to a rectangular flat plate, which is not unique. The second support plate 5 corresponds to the first support plate 1, and the two are preferably in the same shape and size. Of course, the second support plate 5 and the first support plate 1 may be different in size or shape. For example, the first support plate 1 is an arc plate, and the second support plate 5 is an annular plate. The second support plate 5 can correspond to multiple first support plates 1, or vice versa, the first support plate 1 corresponds to multiple second support plates 5, etc. A support assembly 3 is provided between each corresponding first support plate 1 and second support plate 5, so that an annular space, that is, an annular compartment, can be formed between the inner tank and the outer tank of the film tank. The annular compartment is filled with insulation material 4, so that an insulation layer can be formed between the inner tank and the outer tank. Compared with the previous insulation layer structure, in this embodiment, since a support plate and a support assembly 3 are added between the inner tank and the outer tank, the annular space can present a mesh or hollow structure, so that the insulation material 4 can have better adhesion and can avoid being squeezed by the inner tank and the outer tank, causing the material to deform and affect the insulation effect. That is, the insulation layer formed in this embodiment has a more stable structure and a better insulation effect.

[0046] Further, in this embodiment, the support assembly 3 includes a plurality of support columns, and a plurality of connection holes are respectively opened on the side opposite to the first support plate 1 and the second support plate 5, which can also be connection grooves. The plurality of connection holes are at least arranged at the vertex and center of the first support plate 1 and the second support plate 5, and the plurality of support columns are respectively connected to the first support plate 1 and the second support plate 5 through the respective connection holes. For example, the support column is cylindrical, or it can be a column with a square or other shape in cross section. The cross-sectional size of the support column is not fixed, and can be comprehensively determined according to the volume of the actual film tank and the number of support columns used. In this embodiment, the diameter or width of the support column is 2mm-3mm. Multiple support columns can be evenly arranged at each vertex and center area of ​​the support plate. The number of support columns between different first support plates 1 and second support plates 5 can be the same or different, and the size and arrangement position of the support columns can also be different. For example, which areas of the film tank are more susceptible to stress or more likely to accumulate stress, support columns with increased size and number can be set between the support plates corresponding to the area. In this embodiment, the same number and size of support columns are arranged between each corresponding first support plate 1 and second support plate 5, and the arrangement positions of each support column between different support plates are consistent, that is, all support columns are evenly arranged between each first support plate 1 and second support plate 5. In actual use, the number of support columns is at least 4, and the column body can be a solid column body or a hollow column body. When it is a hollow column body, the heat insulation material 4 can be filled in the column body.

[0047] When fixing the support column, in this embodiment, corresponding connection holes are opened on the first support plate 1 and the second support plate 5, and the two ends of the support column are respectively inserted into the corresponding connection holes, and adhesives can be added to make the connection between the support column and the connection holes more firmly. Through this arrangement, the two ends of the support column can be connected to the inner tank and the outer tank respectively, and connected to the first support plate 1 and the second support plate 5 at the same time, so that the liquid pressure on the inner tank can be more fully and evenly transferred to the outer tank, avoiding the inner tank from being subjected to high pressure, and protecting the inner tank and the stored liquid goods. The length of the support rod is not fixed, and can be specifically determined by the tank capacity and the required insulation layer thickness requirements, but it should be at least not less than 500mm, so as to facilitate the filling of the insulation material 4.

[0048] Based on the above content, it can be known that the film tank support structure of this embodiment can make the overall support structure more effective in terms of force performance by setting an annular space structure between the inner tank and the outer tank, and can effectively ensure that the liquid pressure borne by the inner tank can be evenly transmitted to the outer tank, and then dissipated by the outer tank, avoiding local stress concentration in the inner tank, causing the film tank structure to be unstable and prone to safety hazards. In terms of long-term operation, the support structure of this embodiment provides a stable structure and an annular compartment for filling with insulation material 4. Therefore, in the subsequent long-term use process, the insulation material 4 can be refilled according to the overall insulation state of the film tank, which is convenient to operate and saves repair and maintenance costs. Specifically, one or more insulation material 4 filling ports can be left between the inner tank and the outer tank to facilitate the subsequent filling of insulation material 4.

[0049] Furthermore, the thermal insulation material 4 in this embodiment is a bulk material with low thermal conductivity and high thermal insulation performance, and the bulk material includes at least one or more of expanded perlite and glass microspheres. Moreover, the use of bulk materials can also facilitate subsequent secondary filling according to different thermal insulation requirements or the actual thermal insulation effect of the film tank. If there is no need for secondary filling, other non-bulk thermal insulation materials 4 can also be used for filling, and there is no specific limitation.

[0050] Through the above-mentioned setting method, the film tank can have a stronger advantage in the cold preservation effect, that is, the use of bulk cold insulation materials has a greater advantage in the cold preservation effect of the film tank, because the bulk material has excellent thermal insulation performance, which can effectively reduce the transfer of heat, thereby reducing the temperature loss of the medium in the tank; and the bulk cold insulation material has good filling and plasticity, and can adapt to film tanks of different shapes and sizes, ensuring the uniformity and continuity of the insulation layer, and can effectively avoid the insulation layer wrapped around the inner tank from being damaged or cracked, resulting in heat exchange between the medium in the tank and the external environment, thereby affecting the cold preservation effect.

[0051] In one embodiment, if Figure 2 As shown, the first support plate 1 is made of non-metallic material, and a metal connector 2 is provided on the first support plate 1. The metal connector 2 is used to connect with the metal inner tank to fix the first support plate 1 on the inner tank.

[0052] Specifically, in this embodiment, the metal connector 2 is a metal embedded part embedded in the first support plate 1, and the first support plate 1 is welded and fixed to the inner tank through the metal embedded part. The size, specific preparation material and specific structure of the metal embedded part are not fixed, and the specific design can be determined by combining the size, weight, load, environmental factors (such as temperature, humidity, corrosion) of the tank body, and the connection method between the metal embedded part and the first support plate 1. As an example, the thickness of the metal embedded part in this embodiment is 2mm-4mm, and at least two first metal embedded parts are embedded in the first support plate 1 at intervals, and at least one second metal embedded part is located between two adjacent first metal embedded parts. The shapes of the first metal embedded part and the second metal embedded part are different, wherein the first metal embedded part is a long strip, and the second metal embedded part can be circular, rectangular, etc., and the specific shape is not fixed. The number of the first metal embedded parts and the second metal embedded parts is not fixed, and needs to be determined comprehensively based on the size of the first support plate 1, the stress conditions of the metal embedded parts during application, welding convenience and other conditions. The size of each metal embedded part, including length, width, area, etc., also needs to be determined comprehensively based on the material, the stress conditions of the metal embedded parts during application and welding convenience.

[0053] like Figure 3 As shown, in this embodiment, the second support plate 5 is also made of non-metallic material, and the second support plate 5 is fixed to the outer tank by a sealant 6. The sealant 6 is coated on the outer surface of the second support plate 5, and at least three strips are longitudinally distributed so that it can be firmly bonded to the inner surface of the outer tank. In order to increase the airtightness of the film tank, a coating for improving the airtightness of the outer tank is also coated on the inner surface of the outer tank in this embodiment. The coating can not only ensure the sealing of the film tank, but also improve the corrosion resistance and cold preservation performance of the film tank. By reasonably selecting the type of coating, controlling the coating process and ensuring the quality of the coating, the performance and service life of the coating system can be effectively improved, providing reliable protection for the safe operation of the film tank.

[0054] Specifically, the first support plate 1 and the second support plate 5 in this embodiment are wooden plywood. The thickness of the board body can be but not limited to 5mm-10mm, and the length and width are not fixed, and can be reasonably arranged according to the volume of the film tank. The material of the support plate in this embodiment is composed of wood segments peeled into veneers or wood blocks sliced ​​into thin wood boards, that is, the material comes from natural forests, artificial forest materials, bamboo or other composite materials, and in order to manufacture high-quality plywood, this embodiment also specially selects high-quality tree species and colloid materials to prepare the support plate. Of course, in actual application, the support plate can also be formed by other types of board bodies, not limited to plywood, and is only used as an example here.

[0055] In actual operation, the required metal embedded parts, the first support plate 1, the second support plate 5, and the support assembly 3 can be prepared. A cavity for embedding the metal embedded parts is set on one side of the first support plate 1, and the metal embedded parts are fixed in the cavity. A connecting hole is set on the other side for connecting the support assembly 3. An adhesive is coated on one side of the second support plate 5 for pasting and fixing it on the inner side of the outer tank. A connecting hole is opened on the other side for connecting the support assembly 3. After that, the first support plate 1 and the second support plate 5 can be connected and fixed by using the support assembly 3, and they can be assembled into the film tank, and finally filled with the insulation material 4.

[0056] The membrane tank support structure of this embodiment can realize on-site assembly construction in terms of construction convenience, that is, the support assembly 3 and the support plate can be pre-fabricated in the factory through standardized production processes, and then assembled, and then the assembly can be transported to the construction site for assembly with the membrane tank, or the prefabricated structural parts can be transported to the construction site for on-site assembly, which is convenient and flexible, and different methods can be selected according to actual conditions to achieve installation. At the same time, the overall structure of the support structure involves fewer parts and the assembly process is simple, so the construction process requirements are not high, which reduces the technical level requirements of the construction personnel, greatly shortens the construction period, and can be widely used.

[0057] Another embodiment of the present invention also provides a film tank, including an outer tank, an inner tank, and a film tank support structure as described in any of the above embodiments, which is located between the outer tank and the inner tank and is respectively connected to the outer tank and the inner tank.

[0058] The film tank can be a film tank for marine transportation or a film tank for land transportation, and has a wide range of applications.

[0059] The above embodiments are only exemplary embodiments of the present invention and are not intended to limit the present invention. The protection scope of the present invention is defined by the claims. Those skilled in the art may make various modifications or equivalent substitutions to the present invention within the essence and protection scope of the present invention, and such modifications or equivalent substitutions shall also be deemed to fall within the protection scope of the present invention.

Claims

1. A membrane tank support structure, characterized in that: include: A first support plate, fixed on the outer surface of the inner tank of the film tank; A second support plate, fixed on the inner surface of the outer tank of the film tank and opposite to the first support plate; A support assembly, located between the first support plate and the second support plate, and connected to the first support plate and the second support plate respectively, for forming a compartment between the first support plate and the second support plate; as well as The heat-insulating material is filled in the compartment.

2. The membrane tank support structure according to claim 1, characterized in that: The first support plate is made of non-metallic material. A metal connector is disposed on the first support plate. The metal connector is used to connect with the metal inner tank so as to fix the first support plate on the inner tank.

3. The membrane tank support structure according to claim 2, characterized in that: The metal connecting piece is a metal embedded piece embedded in the first supporting plate, and the first supporting plate is welded and fixed to the inner tank through the metal embedded piece.

4. The membrane tank support structure according to claim 3, characterized in that: At least one first metal embedded part is embedded in the first support plate at intervals, and at least one second metal embedded part is located between two adjacent first metal embedded parts. The first metal embedded part and the second metal embedded part have different shapes, wherein the first metal embedded part is a long strip.

5. The membrane tank support structure according to claim 1, characterized in that: The second support plate is made of non-metallic material and is fixed to the outer tank by means of sealant.

6. The membrane tank support structure according to claim 5, characterized in that: A coating for improving the air tightness of the outer tank is coated on the inner surface of the outer tank.

7. The membrane tank support structure according to claim 1, characterized in that: The support assembly includes a plurality of support columns, and a plurality of connection holes are respectively opened on the side opposite to the first support plate and the second support plate. The plurality of connection holes are at least arranged at the top corners and the center of the first support plate and the second support plate, and the plurality of support columns are respectively connected to the first support plate and the second support plate through the respective connection holes.

8. The membrane tank support structure according to claim 1, characterized in that: The first support plate and the second support plate are wooden plywood; The thermal insulation material is a bulk material with low thermal conductivity and high thermal insulation performance, and the bulk material includes at least one or more of expanded perlite and glass microspheres.

9. The membrane tank support structure according to claim 1, characterized in that: There are multiple first support plates, and the multiple first support plates cover the outer surface of the inner tank. There are multiple second support plates, and the multiple second support plates cover the inner surface of the outer tank. The support structure and the thermal insulation material are provided between the first support plates and the second support plates at corresponding positions.

10. A film tank, characterized in that: The invention comprises an outer tank, an inner tank and a film tank supporting structure as claimed in any one of claims 1 to 9, which is located between the outer tank and the inner tank and is connected to the outer tank and the inner tank respectively.

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