Anchor structure, membrane system and liquefied gas storage tank

Abstract

The present application provides an anchoring structure, a film system and a liquefied gas storage tank. The anchoring structure includes: a stud, a nut and a secondary anchoring plate. The film system includes a main film, a main plywood, a secondary film and a secondary plywood. The secondary anchoring plate is connected to the top of the secondary plywood, the secondary film is connected to the top of the secondary anchoring plate, the first pressing plate arranged on the stud is pressed on the top of the secondary film, the main plywood is arranged on the top of the secondary film, the second pressing plate arranged on the stud is pressed on the top of the main plywood, the main film is arranged on the main plywood, and the nut is pressed on the top of the main film, so that the film system is connected and fixed by the anchoring structure, ensuring the connection strength of each level in the film system. The area of ​​the first pressing plate is larger than the area of ​​the first through hole, the area of ​​the second pressing plate is larger than the area of ​​the second through hole, and the area of ​​the nut in contact with the main film is larger than the area of ​​the third through hole, thereby improving the airtightness of the film system and avoiding leakage of liquefied gas in the storage tank.

Description

Technical Field

[0001] The present application relates to the field of liquefied gas storage tanks, and in particular to an anchoring structure, a membrane system and a liquefied gas storage tank. Background Art

[0002] Membrane type liquefied gas storage tanks may include a membrane system, a suspended ceiling, a pump well, a concrete outer tank, and a heating system. The membrane system is the innermost structure of the tank and is used to contain liquefied gas.

[0003] The film system may include an insulation layer, a secondary plywood, a secondary film, a primary plywood, and a primary film. Moreover, the above structures are all connected by an anchoring structure. In the related art, the anchoring structure causes leakage gaps in the film system, resulting in leakage of liquefied gas in the storage tank. Summary of the invention

[0004] The present application provides an anchoring structure, a membrane system and a liquefied gas storage tank, which ensure that each layer in the membrane system has good connection strength while improving the airtightness of the membrane system, thereby preventing leakage of liquefied gas in the storage tank.

[0005] In a first aspect, the present application provides an anchoring structure for fastening and connecting a film system, the anchoring structure comprising: a stud, a nut and a secondary anchoring plate. The film system comprises a primary film, a primary plywood, a secondary film and a secondary plywood. The secondary anchoring plate is connected above the secondary plywood, and the secondary anchoring plate comprises a fastening groove. The secondary film is connected above the secondary anchoring plate, and a first through hole is provided on the secondary film. A first pressing plate is provided on the stud, and the area of ​​the first pressing plate is larger than the area of ​​the first through hole. The stud passes through the first through hole and is fixed in the fastening groove, so that the first pressing plate is pressed against the secondary film. The primary plywood is arranged above the secondary film. A second through hole is provided on the primary plywood. A second pressing plate is provided on the stud, and the area of ​​the second pressing plate is larger than the area of ​​the second through hole. The stud passes through the second through hole, so that the second pressing plate is pressed against the primary plywood. The primary film is arranged above the primary plywood. A third through hole is provided on the primary film. The stud is sleeved on the third through hole, and the nut is sleeved on one end of the stud so that the nut is pressed tightly on the main film, and the contact area between the nut and the main film is larger than the area of ​​the third through hole.

[0006] According to the first aspect, the anchoring structure includes: a stud, a nut and a secondary anchoring plate. The membrane system includes a main membrane, a main plywood, a secondary membrane and a secondary plywood. The secondary anchoring plate is connected to the top of the secondary plywood, so that the secondary anchoring plate and the secondary plywood are connected as a whole. The secondary membrane is connected to the top of the secondary anchoring plate, the stud passes through the first through hole on the secondary membrane and is fixed in the fastening groove of the secondary anchoring plate, and the first pressing plate arranged on the stud is pressed on the top of the secondary membrane, so that the secondary membrane, the secondary anchoring plate and the secondary plywood are connected as a whole. The main plywood is sleeved on the stud through the second through hole, so that the main plywood is arranged on the top of the secondary membrane. The second pressing plate arranged on the stud is pressed on the top of the main plywood, so that the main plywood, the secondary membrane, the secondary anchoring plate and the secondary plywood are connected as a whole. The main membrane is sleeved on the bolt through the third through hole, so that the main membrane is arranged on the top of the main plywood. The nut is sleeved on one end of the stud, so that the nut is pressed tightly on the main film, so that the main film, the main plywood, the secondary film, the secondary anchoring plate and the secondary plywood are connected as a whole, and then the film system is connected and fixed through the anchoring structure, ensuring the connection strength of each level in the film system. The area of ​​the first pressing plate is larger than the area of ​​the first through hole, the area of ​​the second pressing plate is larger than the area of ​​the second through hole, and the area where the nut contacts the main film is larger than the area of ​​the third through hole, which improves the airtightness of the secondary film, the main plywood and the main film, thereby improving the airtightness of the film system and preventing the leakage of liquefied gas in the storage tank.

[0007] In a possible design, the secondary anchoring plate may include a connecting plate, on which a plurality of riveting holes are arranged for riveting the secondary anchoring plate to the secondary plywood.

[0008] Based on the description of the above embodiments, the rivet holes provided on the connecting plate enable the secondary anchor plate to be riveted to the secondary plywood, thereby fastening the secondary anchor plate to the secondary plywood, thereby ensuring the stability and reliability of the connection between the secondary anchor plate and the secondary plywood.

[0009] In a possible design, the first pressing plate can be welded to the secondary film.

[0010] Based on the description of the above embodiment, the first pressing plate is welded on the secondary film layer, which can further ensure the airtightness of the secondary film layer.

[0011] In a possible design, a first groove structure is formed on the main plywood, and the first pressing plate is embedded in the first groove structure.

[0012] Based on the description of the above embodiment, the first pressing plate is embedded in the first groove structure opened on the main plywood, so that the main plywood can be attached to the secondary film, which can save production costs and improve the cold preservation effect of the film system.

[0013] In a possible design, the stud may further include a pressing block, on which a fourth through hole is formed, and the stud is sleeved on the fourth through hole, so that the pressing block is pressed tightly against the second pressing plate.

[0014] Based on the description of the above embodiments, the pressing block is pressed tightly on the second pressing plate, which can improve the connection reliability of the main plywood and increase the capacity of the storage tank.

[0015] In a possible design, a second groove structure is provided on the main plywood, and the second pressing plate and the pressing block are both embedded in the second groove structure.

[0016] Based on the description of the above embodiments, the second pressing plate and the pressing block are embedded in the second groove structure opened on the main plywood, so that the main plywood can fit with the main layer of film, which can save production costs and improve the cold preservation effect of the film system.

[0017] In a possible design, the second pressure plate is detachably connected to the stud.

[0018] Based on the description of the above embodiment, the second pressing plate is detachably connected to the stud so as to enable the film system to be assembled smoothly.

[0019] In one possible design, the nut can be welded to the primary membrane.

[0020] Based on the description of the above embodiments, the nut is welded on the main layer film, which can further ensure the airtightness of the main layer film.

[0021] In a second aspect, the present application provides a film system, comprising an insulation layer, a secondary plywood, a secondary film, a primary plywood, a primary film, and an anchoring structure as described in any one of the above embodiments. The anchoring structure is used to connect and fix the insulation layer, the secondary plywood, the secondary film, the primary plywood, and the primary film.

[0022] In a third aspect, the present application provides a liquefied gas storage tank, comprising the membrane system described in the above embodiments.

[0023] The beneficial effects of the membrane system provided in the above-mentioned second aspect and the liquefied gas storage tank provided in the above-mentioned third aspect can be referred to the beneficial effects brought about by the above-mentioned first aspect and each possible implementation method of the first aspect, and will not be repeated here. BRIEF DESCRIPTION OF THE DRAWINGS

[0024] In order to more clearly illustrate the technical solutions of the embodiments of the present application, the following is a brief introduction to the drawings required for use in the description of the embodiments. Obviously, the drawings described below are some embodiments of the present application. For ordinary technicians in this field, other drawings can be obtained based on these drawings without creative work.

[0025] Figure 1 This is an exploded view of a thin film system in an embodiment of the present application.

[0026] Figure 2 This is a schematic diagram of the structure of a thin film system in an embodiment of the present application.

[0027] Figure 3 for Figure 2 Cross-sectional view along direction A.

[0028] Figure 4 for Figure 3 Magnified view of section B.

[0029] Figure 5 This is a schematic structural diagram of an anchoring structure in an embodiment of the present application.

[0030] Figure 6 for Figure 5 View from another perspective.

[0031] Figure 7 It is a schematic diagram of the structure of a nut in an embodiment of the present application.

[0032] Figure 8 This is a schematic diagram of the structure of another anchoring structure in an embodiment of the present application.

[0033] Fig. 9 This is a schematic diagram of the structure of another nut in an embodiment of the present application.

[0034] Description of reference numerals:

[0035] 100-Thin film system;

[0036] 1-anchoring structure; 11-stud; 12-nut; 121-first protruding structure; 122-positioning plate; 123-second protruding structure; 13-secondary anchoring plate; 131-fastening groove; 132-connecting plate; 133-riveting hole; 14-first pressing plate; 15-second pressing plate; 16-pressing block; 161-fourth through hole;

[0037] 2-main film layer; 21-third through hole; 3-main plywood; 31-second through hole; 32-first groove structure; 33-second groove structure; 4-secondary film layer; 41-first through hole; 5-secondary plywood. DETAILED DESCRIPTION

[0038] In order to make the purpose, technical solution and advantages of the embodiments of the present application clearer, the technical solution in the embodiments of the present application will be clearly and completely described below in conjunction with the drawings in the embodiments of the present application. Obviously, the described embodiments are part of the embodiments of the present application, not all of the embodiments. Based on the embodiments in the present application, all other embodiments obtained by ordinary technicians in this field without creative work are within the scope of protection of this application.

[0039] Unless otherwise defined, all technical and scientific terms used herein have the same meaning as commonly understood by technicians in the technical field to which this application belongs; the terms used in the specification of the application are only for the purpose of describing specific embodiments and are not intended to limit this application.

[0040] The terms "comprising" and "having" and any variations thereof in the specification, claims and drawings of this application are intended to cover but not exclude other contents. The word "a" or "an" does not exclude the presence of a plurality.

[0041] Reference to "embodiments" herein means that a particular feature, structure, or characteristic described in conjunction with the embodiments may be included in at least one embodiment of the present application. The appearance of the phrase "embodiments" in various locations in the specification does not necessarily refer to the same embodiment, nor is it an independent or alternative embodiment that is mutually exclusive with other embodiments. It is explicitly and implicitly understood by those skilled in the art that the embodiments described herein may be combined with other embodiments.

[0042] The term "and / or" in this article is only a description of the association relationship of the associated objects, indicating that there can be three relationships. For example, A and / or B can mean: A exists alone, A and B exist at the same time, and B exists alone. In addition, the character " / " in this article generally indicates that the associated objects before and after are in an "or" relationship.

[0043] The directional words appearing in the following description are all directions shown in the drawings, and do not limit the specific structure of the present application. For example, in the description of the present application, the directions or positional relationships indicated by the terms "center", "longitudinal", "lateral", "length", "width", "thickness", "up", "down", "front", "back", "left", "right", "vertical", "horizontal", "top", "bottom", "inside", "outside", "clockwise", "counterclockwise", "axial", "radial", "circumferential", etc. are based on the directions or positional relationships shown in the drawings, and are only for the convenience of describing the present application and simplifying the description, rather than indicating or implying that the device or element referred to must have a specific direction, be constructed and operated in a specific direction, and therefore cannot be understood as limiting the present application.

[0044] In addition, the expressions of indicated directions such as the X direction, the Y direction, and the Z direction used to illustrate the operation and construction of the components of the present embodiment are not absolute but relative, and although these indications are appropriate when the components are in the positions shown in the figures, when these positions are changed, these directions should be interpreted differently to correspond to the changes.

[0045] In addition, the terms "first", "second", etc. in the specification and claims of this application or the above-mentioned drawings are used to distinguish different objects rather than to describe a specific order, and may explicitly or implicitly include one or more of the features.

[0046] In the description of the present application, unless otherwise specified, “plurality” means more than two (including two), and similarly, “plurality groups” means more than two (including two).

[0047] In the description of the present application, it should be noted that, unless otherwise clearly specified and limited, the terms "installation", "connection" and "connection" should be understood in a broad sense. For example, the "connection" or "connection" of a mechanical structure may refer to a physical connection. For example, the physical connection may be a fixed connection, such as a fixed connection through a fixing member, such as a fixed connection through a screw, bolt or other fixing member; the physical connection may also be a detachable connection, such as a mutual snap connection or snap connection; the physical connection may also be an integral connection, such as welding, bonding or integral molding to form a connection for connection. The "connection" or "connection" of a circuit structure may refer to an electrical connection or a signal connection in addition to a physical connection. For example, it may be a direct connection, that is, a physical connection, or it may be an indirect connection through at least one intermediate element, as long as the circuit is connected, or it may be the internal connection of two elements; the signal connection may refer to a signal connection through a media medium, such as a radio wave, in addition to a signal connection through a circuit. For ordinary technicians in this field, the specific meanings of the above terms in this application can be understood according to specific circumstances.

[0048] Liquefied gas storage tanks are used to store liquefied gas. Depending on the type of liquefied gas, liquefied gas storage tanks can include LPG storage tanks and LNG storage tanks. Among them, LPG storage tanks are used to store liquefied petroleum gas, and LNG storage tanks are used to store liquefied natural gas.

[0049] According to the application scenario of the storage tank, the liquefied gas storage tank can include a land storage tank and a ship storage tank. Among them, the land storage tank is set on land, and the ship storage tank is set on a ship.

[0050] According to the structure of the storage tank, the liquefied gas storage tank may include but is not limited to a membrane storage tank. Among them, the membrane storage tank may include a membrane system, a suspended ceiling, a pump well, a concrete outer tank, and a heating system. The membrane system is the innermost structure of the storage tank and is used to hold the liquefied gas.

[0051] Specifically, the film system may include an insulation layer, a secondary plywood, a secondary film, a primary plywood, and a primary film. Moreover, the above structures are all connected by an anchoring structure. In the related art, the anchoring structure causes leakage gaps in the film system, resulting in leakage of liquefied gas in the storage tank.

[0052] Based on this, the present application provides an anchoring structure, which enables each layer in the membrane system to have good connection strength and improves the airtightness of the membrane system, thereby preventing the leakage of liquefied gas in the storage tank. Figures 1 to 9 Provide specific instructions.

[0053] First, as Figure 1 As shown, the present application provides an anchoring structure 1 for fastening and connecting a film system 100, and the anchoring structure 1 includes: a stud 11, a nut 12 and a secondary anchoring plate 13. The film system 100 includes a main film 2, a main plywood 3, a secondary film 4 and a secondary plywood 5. The secondary anchoring plate 13 is connected above the secondary plywood 5, and the secondary anchoring plate 13 includes a fastening groove 131. The secondary film 4 is connected above the secondary anchoring plate 13, and a first through hole 41 is provided on the secondary film 4. A first pressing plate 14 is provided on the stud 11, and the area of ​​the first pressing plate 14 is larger than the area of ​​the first through hole 41. The stud 11 passes through the first through hole 41 and is fixed in the fastening groove 131, so that the first pressing plate 14 is pressed tightly above the secondary film 4. The main plywood 3 is arranged above the secondary film 4. A second through hole 31 is provided on the main plywood 3. A second pressing plate 15 is provided on the stud 11, and the area of ​​the second pressing plate 15 is larger than the area of ​​the second through hole 31. The stud 11 passes through the second through hole 31, so that the second pressing plate 15 is pressed tightly on the main plywood 3. The main layer film 2 is provided on the main plywood 3. A third through hole 21 is provided on the main layer film 2. The stud 11 is sleeved on the third through hole 21. The nut 12 is sleeved on one end of the stud 11, so that the nut 12 is pressed tightly on the main layer film 2. In addition, the area where the nut 12 contacts the main layer film 2 is larger than the area of ​​the third through hole 21.

[0054] The main layer film 2 is used to directly contact the liquefied gas and ensure the sealing of the storage tank, thereby preventing the liquefied gas from leaking. At the same time, the main layer film 2 can be configured to be corrugated to adapt to structural deformation.

[0055] The secondary film 4 can serve as a second line of defense for the film system 100 to prevent leakage of liquefied gas caused by failure of the primary film 2 .

[0056] The main plywood 3 is used to support the main layer of film 2 and to share the load of the film system 100 , thereby ensuring the structural stability of the film system 100 .

[0057] The secondary plywood 5 is used to support the secondary film 4 and to share the load of the film system 100 , thereby ensuring the structural stability of the film system 100 .

[0058] The anchoring structure 1 is used to stack and connect the primary film 2 , the primary plywood 3 , the secondary film 4 , the secondary plywood 5 and the insulation layer in sequence, so as to form a complete film system 100 .

[0059] Specifically, the anchoring structure 1 may include a stud 11 , a nut 12 and a secondary anchoring plate 13 .

[0060] The secondary anchoring plate 13 is connected above the secondary plywood 5, so that the secondary anchoring plate 13 and the secondary plywood 5 are connected as a whole.

[0061] Specifically, the outermost layer of the film system 100 may also be provided with an insulation layer (not shown in the figure). The insulation layer is used for heat insulation to maintain a low temperature environment in the storage tank, thereby avoiding evaporation loss of liquefied gas. The insulation layer is located below the secondary plywood 5. Grooves are provided on the secondary plywood 5 and the insulation layer. Adaptively, as Figure 2-Figure 3 As shown, the secondary anchoring plate 13 may be an inverted "J"-shaped structure, so that the secondary anchoring plate 13 may include a downwardly protruding fastening groove 131. The fastening groove 131 is simultaneously sleeved in the grooves provided in the secondary plywood 5 and the insulation layer, so that the secondary anchoring plate 13, the secondary plywood 5 and the insulation layer are connected as a whole.

[0062] It should be noted that the downward direction in this and the following text refers to the direction from the inside of the tank to the outside of the tank. Similarly, the upward direction in this and the following text refers to the direction from the outside of the tank to the inside of the tank.

[0063] Further, the sub-layer film 4 is connected above the sub-layer anchoring plate 13, and a first through hole 41 is provided on the sub-layer film 4. Among them, a first pressure plate 14 is provided on the stud 11, and the area of ​​the first pressure plate 14 is larger than the area of ​​the first through hole 41. The stud 11 passes through the first through hole 41 and is fixed in the fastening groove 131, so that the first pressure plate 14 presses the sub-layer film 4, thereby connecting the sub-layer film 4, the sub-layer anchoring plate 13, the sub-plywood 5 and the insulation layer as a whole. Specifically, the outer diameter of the stud 11 can range from 10 to 20 mm to ensure the structural strength of the stud 11 itself, thereby strengthening the connection strength of each level in the film system 100. Specifically, the thickness of the first pressure plate 14 can range from 5 to 10 mm to ensure the structural strength of the first pressure plate 14 itself, thereby strengthening the connection strength of each level in the film system 100.

[0064] For example, the stud 11 may be provided with an external thread, and the fastening groove 131 may be provided with an internal thread. The external thread engages with the internal thread, so that the stud 11 is tightened in the fastening groove 131, and the first pressing plate 14 presses the secondary film 4. In addition, the area of ​​the first pressing plate 14 is larger than the area of ​​the first through hole 41, so that the first pressing plate 14 can completely cover the first through hole 41, ensuring the airtightness of the secondary film 4, so that the secondary film 4 has the function of preventing liquefied gas leakage.

[0065] Furthermore, the main plywood 3 is arranged above the secondary film 4 , and a second through hole 31 is opened on the main plywood 3 .

[0066] The second pressing plate 15 is arranged on the stud 11, and the area of ​​the second pressing plate 15 is larger than the area of ​​the second through hole 31. The stud 11 passes through the second through hole 31, so that the second pressing plate 15 is pressed tightly on the main plywood 3, so that the main plywood 3, the secondary film 4, the secondary anchoring plate 13, the secondary plywood 5 and the insulation layer are connected as a whole. Specifically, the thickness of the second pressing plate 15 can be 5-10 mm to ensure the structural strength of the second pressing plate 15 itself, thereby strengthening the connection strength of each layer in the film system 100.

[0067] In addition, the area of ​​the second pressing plate 15 is larger than the area of ​​the second through hole 31, so that the second pressing plate 15 can completely cover the second through hole 31, thereby improving the airtightness of the main plywood 3 and further improving the ability of the film system 100 to prevent liquefied gas leakage.

[0068] Furthermore, the main film layer 2 is arranged above the main plywood 3 , and a third through hole 21 is opened on the main film layer 2 .

[0069] The stud 11 is sleeved on the third through hole 21. The nut 12 is sleeved on one end of the stud 11, so that the nut 12 is pressed tightly on the main film 2, so that the main film 2, the main plywood 3, the secondary film 4, the secondary anchoring plate 13, the secondary plywood 5 and the insulation layer are connected as a whole.

[0070] For example, the nut 12 may be provided with an internal thread, and the stud 11 may be provided with an external thread. The internal thread and the external thread are engaged, so that the nut 12 is tightened toward the main layer film 2 until the nut 12 is pressed against the main layer film 2, thereby preventing the main layer film 2 from loosening, and further improving the reliability of the connection between the layers of the film system 100. In addition, the tighter the layer connection between the film system 100, the smaller the thickness of the film system 100, so that the storage tank can store more liquefied gas under the condition of a certain volume, thereby increasing the capacity of the storage tank.

[0071] In addition, the contact area between the nut 12 and the main film 2 is larger than the area of ​​the third through hole 21, so that the nut 12 can completely cover the third through hole 21, thereby improving the airtightness of the main film 2, thereby enabling the main film 2 to prevent liquefied gas leakage.

[0072] On the other hand, in the related art, the anchoring structure 1 penetrates the membrane system 100. The anchoring structure 1 provided in the present application does not penetrate the outermost insulation layer of the membrane system 100, thus further improving the airtightness of the membrane system 100.

[0073] According to the above content, the anchoring structure 1 can connect the primary film 2, the primary plywood 3, the secondary film 4, the secondary anchoring plate 13, the secondary plywood 5 and the insulation layer into a whole. Figure 4 It can be seen that a secondary anchoring plate 13 is arranged between the secondary plywood 5 and the stud 11, and a first pressing plate 14 and a second pressing plate 15 are arranged between the main plywood 3 and the stud 11, so that neither the secondary plywood 5 nor the main plywood 3 directly bears the anchoring force borne by the stud 11, thereby improving the structural strength of the secondary plywood 5 and the main plywood 3, and further improving the structural strength of the membrane system 100 and the connection strength between the various levels of the membrane system 100.

[0074] The anchoring structure 1 provided in the first aspect of the present application includes: a stud 11, a nut 12 and a secondary anchoring plate 13. The film system 100 includes a main film 2, a main plywood 3, a secondary film 4 and a secondary plywood 5. The secondary anchoring plate 13 is connected to the top of the secondary plywood 5, so that the secondary anchoring plate 13 and the secondary plywood 5 are connected as a whole. The secondary film 4 is connected to the top of the secondary anchoring plate 13, the stud 11 passes through the first through hole 41 on the secondary film 4 and is fixed in the fastening groove 131, and the first pressing plate 14 provided on the stud 11 is pressed on the top of the secondary film 4, so that the secondary film 4, the secondary anchoring plate 13 and the secondary plywood 5 are connected as a whole. The main plywood 3 is sleeved on the stud 11 through the second through hole 31, so that the main plywood 3 is arranged above the secondary film 4. The second pressing plate 15 provided on the stud 11 is pressed on the main plywood 3, so that the main plywood 3, the secondary film 4, the secondary anchoring plate 13 and the secondary plywood 5 are connected as a whole. The main film 2 is sleeved on the bolt through the third through hole 21, so that the main film 2 is arranged on the main plywood 3. The nut 12 is sleeved on one end of the stud 11, so that the nut 12 is pressed on the main film 2, so that the main film 2, the main plywood 3, the secondary film 4, the secondary anchoring plate 13 and the secondary plywood 5 are connected as a whole, and then the film system 100 is connected and fixed through the anchoring structure 1, ensuring the connection strength of each level in the film system 100. The area of ​​the first pressure plate 14 is larger than the area of ​​the first through hole 41, the area of ​​the second pressure plate 15 is larger than the area of ​​the second through hole 31, and the area of ​​the nut 12 in contact with the main film 2 is larger than the area of ​​the third through hole 21. At the same time, the airtightness of the secondary film 4, the main plywood 3 and the main film 2 is improved, thereby improving the airtightness of the film system 100 and preventing leakage of liquefied gas in the storage tank.

[0075] Furthermore, in some embodiments, the secondary anchoring plate 13 may include a connecting plate 132. The connecting plate 132 is provided with a plurality of rivet holes 133 for riveting the secondary anchoring plate 13 to the secondary plywood 5.

[0076] like Figure 4 As shown, the secondary anchoring plate 13 of the inverted “J”-shaped structure may include a downwardly protruding fastening groove 131 and connecting plates 132 connected to both sides of the fastening groove 131 .

[0077] Among them, riveting is a mechanical connection method that connects two or more parts together through rivets, which can provide high connection strength, stability and reliability of the connection. In addition, riveting is simple to operate, does not require complex equipment and tools, can achieve rapid assembly, and improve production efficiency.

[0078] In summary, the rivet holes 133 provided on the connecting plate 132 enable the secondary anchor plate 13 to be riveted to the secondary plywood 5, so that the secondary anchor plate 13 is firmly connected to the secondary plywood 5, thereby ensuring the stability and reliability of the connection between the secondary anchor plate 13 and the secondary plywood 5.

[0079] Furthermore, the present application does not specifically limit the number and position of the rivet holes 133. Figure 5 As shown, four rivet holes 133 are opened on the connecting plate 132, and the four rivet holes 133 are evenly distributed on the four top corners of the rectangular connecting plate 132, so that the riveted connection between the secondary anchor plate 13 and the secondary plywood 5 is more firm and the force at the riveted joint is more uniform, further improving the connection strength between the secondary anchor plate 13 and the secondary plywood 5.

[0080] Furthermore, in some embodiments, the first pressing plate 14 may be welded to the secondary film 4 .

[0081] The first pressing plate 14 is welded on the secondary film 4 to form a seamless continuous joint, which can completely eliminate the leakage path of the secondary film 4 and make the airtightness of the secondary film 4 more reliable.

[0082] In summary, the first pressing plate 14 is welded on the secondary film 4 , which can further ensure the airtightness of the secondary film 4 .

[0083] Furthermore, since the stud 11 is fixedly connected in the fastening groove 131 and the sub-layer film 4 is penetrated by the stud 11, the stud 11 pre-fixes the position of the sub-layer film 4, thereby eliminating the need to pre-fix the sub-layer film 4 by spot welding. Therefore, after the first pressure plate 14 presses the sub-layer film 4, welding can be performed only along the outer edge of the first pressure plate 14.

[0084] Similarly, in some embodiments, the nut 12 can be welded to the main film 2 .

[0085] The nut 12 is welded on the main film 2 to form a seamless continuous joint, which can completely eliminate the leakage path of the main film 2 and make the airtightness of the main film 2 more reliable.

[0086] In summary, the nut 12 is welded on the main layer film 2 , which can further ensure the airtightness of the main layer film 2 .

[0087] Furthermore, the stud 11 is fixedly connected in the fastening groove 131, and the main layer film 2 is penetrated by the stud 11, so that the stud 11 pre-fixes the position of the main layer film 2, thereby eliminating the need to spot weld the main layer film 2 to pre-fix it. Therefore, after the nut 12 presses the main layer film 2, welding can be performed only along the outer edge of the nut 12.

[0088] Specifically, the nut 12 may include but is not limited to the following two structures:

[0089] Structure 1: The nut 12 may include a connecting groove (not shown in the figure) and a positioning plate 122 .

[0090] Specifically, if Figure 6 and Figure 7 As shown, the nut 12 is an inverted "J"-shaped structure, including a first protruding structure 121 protruding upward, the connecting groove is a groove opened from the bottom upward of the first protruding structure 121, and the positioning plate 122 is connected to the bottom of the first protruding structure 121, so that when the connecting groove is sleeved on the stud 11, the positioning plate 122 presses the main layer film 2, thereby connecting the main layer film 2, the main plywood 3, the secondary layer film 4, the secondary layer anchoring plate 13, the secondary plywood 5 and the insulation layer into a whole.

[0091] Structure 2: The nut 12 may include a connecting groove, a positioning plate 122 and a reinforcement groove (not shown in the figure).

[0092] Specifically, if Figure 8 and Fig. 9 As shown, the nut 12 is a "cross" shaped structure, including a first protruding structure 121 protruding upward, a second protruding structure 123 protruding downward, and a positioning plate 122 connected between the two protruding structures. The connecting groove is a groove opened from the bottom to the top of the first protruding structure 121, and the reinforcing groove is the second protruding structure 123. Among them, the reinforcing groove can be a through-hole groove, that is, the reinforcing groove can penetrate the second protruding structure 123, so that the reinforcing groove is connected with the connecting groove, so that the stud 11 can be set in the reinforcing groove and smoothly reach the connecting groove.

[0093] At this time, the reinforcing groove is sleeved on the stud 11, so that the second protruding structure 123 bears part of the shear force for the stud 11, thereby further improving the structural strength of the anchoring structure 1.

[0094] In addition, when the connecting groove and the reinforcing groove are sleeved on the stud 11, the positioning plate 122 presses the main layer film 2, so that the main layer film 2, the main plywood 3, the secondary layer film 4, the secondary anchor plate 13, the secondary plywood 5 and the insulation layer are connected as a whole.

[0095] Furthermore, in some embodiments, a first groove structure 32 is formed on the main plywood 3 , and the first pressing plate 14 is embedded in the first groove structure 32 .

[0096] Specifically, according to Figure 1 and Figure 6 As shown, the area of ​​the first pressing plate 14 is much smaller than the area of ​​the main plywood 3 and the area of ​​the secondary film 4 .

[0097] Since the first pressing plate 14 is disposed between the main plywood 3 and the secondary film 4, the secondary film 4 directly contacts the first pressing plate 14, which results in a gap between the secondary film 4 and the main plywood 3, thereby increasing the volume of the film system 100 and the production cost. In addition, air entering the gap may affect the cold-keeping effect of the film system 100.

[0098] Based on this, a first groove structure 32 is opened on the main plywood 3, and the first pressing plate 14 is embedded in the first groove structure 32, so that the main plywood 3 can fit with the secondary film 4, reducing the volume of the film system 100 while improving the cold preservation effect of the film system 100.

[0099] In summary, the first pressing plate 14 is embedded in the first groove structure 32 opened on the main plywood 3, so that the main plywood 3 can be attached to the secondary film 4, which can save production costs and improve the cold preservation effect of the film system 100.

[0100] Furthermore, in some embodiments, the stud 11 may further include a pressing block 16. The pressing block 16 is provided with a fourth through hole 161. The stud 11 is sleeved on the fourth through hole 161, and the pressing block 16 is pressed tightly against the second pressing plate 15.

[0101] Specifically, the fourth through hole 161 may be provided with an internal thread, and the stud 11 may be provided with an external thread. The internal thread and the external thread are engaged, so that the pressing block 16 is tightened toward the second pressing plate 15 until the pressing block 16 abuts against and presses the second pressing plate 15, thereby preventing the main plywood 3 from loosening, and further improving the reliability of the connection between the various levels of the film system 100. In addition, the tighter the layer connection between the film system 100, the smaller the thickness of the film system 100, the more liquefied gas can be stored in the storage tank under the condition of a certain volume, thereby increasing the capacity of the storage tank.

[0102] The thickness of the pressing block 16 may be 10-20 mm to ensure the structural strength of the pressing block 16 itself, thereby enhancing the connection strength of each layer in the membrane system 100 .

[0103] In summary, the pressing block 16 is pressed tightly on the second pressing plate 15, which can improve the connection reliability of the main plywood 3 and increase the capacity of the storage tank.

[0104] Furthermore, in some embodiments, a second groove structure 33 is formed on the main plywood 3 , and the second pressing plate 15 and the pressing block 16 are both embedded in the second groove structure 33 .

[0105] Specifically, according to Figure 1 and Figure 6 As shown, the area of ​​the second pressing plate 15 and the area of ​​the pressing block 16 are much smaller than the area of ​​the main plywood 3 and the area of ​​the main layer film 2 .

[0106] Since the second pressing plate 15 and the pressing block 16 are disposed between the main plywood 3 and the main film 2, the main film 2 is in direct contact with the pressing block 16, which results in a gap between the main film 2 and the main plywood 3, thereby increasing the volume of the film system 100 and the production cost. In addition, air entering the gap will affect the cooling effect of the film system 100.

[0107] Based on this, a second groove structure 33 is opened on the main plywood 3, and the second pressing plate 15 and the pressing block 16 are embedded in the second groove structure 33, so that the main plywood 3 can be fitted with the main layer film 2, reducing the volume of the film system 100 while improving the cold preservation effect of the film system 100.

[0108] In summary, the second pressing plate 15 and the pressing block 16 are embedded in the second groove structure 33 opened on the main plywood 3, so that the main plywood 3 can be attached to the main layer film 2, which can save production costs and improve the cooling effect of the film system 100.

[0109] Further, according to Figure 4 It can be seen that the first groove structure 32 and the second groove structure 33 are respectively arranged at both ends of the second through hole 31. And the inner diameter of the first groove structure 32 and the inner diameter of the second groove structure 33 are both larger than the inner diameter of the second through hole 31. Considering the assembly sequence and operability of the film system 100. The present application can also be improved as follows:

[0110] In some embodiments, the second pressing plate 15 is detachably connected to the stud 11 .

[0111] After the stud 11 passes through the first through hole 41 and is fixed in the fastening groove 131, the main plywood 3 needs to be sleeved on the stud 11 through the second through hole 31. If the second pressing plate 15 and the stud 11 are non-detachably connected, the second through hole 31 with a smaller inner diameter cannot pass through the second pressing plate 15, and installation cannot be achieved. Therefore, the second pressing plate 15 can be detachably connected to the stud 11. Before the main plywood 3 is sleeved on the stud 11, the second pressing plate 15 is removed first. After the main plywood 3 is sleeved, the second pressing plate 15 is connected to the stud 11 so that the film system 100 can be assembled smoothly.

[0112] Specifically, a fifth through hole may be provided on the second pressing plate 15 , so that the second pressing plate 15 can be inserted into or separated from the stud 11 through the fifth through hole, so as to achieve a detachable connection between the second pressing plate 15 and the stud 11 .

[0113] In summary, the second pressing plate 15 is detachably connected to the stud 11 so that the film system 100 can be assembled smoothly. In a second aspect, the present application provides a film system, including an insulation layer, a secondary plywood, a secondary film, a main plywood, a main film, and an anchoring structure described in any one of the above embodiments. The anchoring structure is used to connect and fix the insulation layer, the secondary plywood, the secondary film, the main plywood, and the main film.

[0114] In a third aspect, the present application provides a liquefied gas storage tank, comprising the membrane system described in the above embodiments.

[0115] Those skilled in the art will appreciate that, although some embodiments herein include certain features included in other embodiments but not other features, the combination of features of different embodiments is meant to be within the scope of the present application and form different embodiments. For example, in the claims, any one of the claimed embodiments may be used in any combination.

[0116] The above embodiments are only used to illustrate the technical solutions of the present application, rather than to limit them. Although the present application has been described in detail with reference to the aforementioned embodiments, those skilled in the art should understand that they can still modify the technical solutions described in the aforementioned embodiments, or make equivalent replacements for some of the technical features therein. However, these modifications or replacements do not deviate the essence of the corresponding technical solutions from the spirit and scope of the technical solutions of the embodiments of the present application.

Claims

1. An anchoring structure for fastening and connecting a membrane system, characterized in that: include: studs, nuts and secondary anchor plates; The film system comprises a primary film layer, a primary plywood, a secondary film layer and a secondary plywood; The secondary anchoring plate is connected above the secondary plywood, and the secondary anchoring plate includes a fastening groove; The secondary film is connected above the secondary anchoring plate, and a first through hole is formed on the secondary film; A first pressing plate is provided on the stud, and the area of ​​the first pressing plate is larger than the area of ​​the first through hole; The stud passes through the first through hole and is fixed in the fastening groove, so that the first pressing plate is pressed tightly on the secondary film; The main plywood is arranged above the secondary film; The main plywood is provided with a second through hole; A second pressing plate is provided on the stud, and the area of ​​the second pressing plate is larger than the area of ​​the second through hole; The stud passes through the second through hole, so that the second pressing plate is pressed tightly on the main plywood; The main layer film is arranged above the main plywood; The main layer film is provided with a third through hole; The stud is sleeved on the third through hole; The nut is sleeved on one end of the stud so that the nut is pressed tightly on the main layer film; Furthermore, the contact area between the nut and the main layer film is larger than the area of ​​the third through hole; The main plywood is provided with a first groove structure and a second groove structure; The first pressing plate is embedded in the first groove structure; The stud also includes a pressing block; The pressing block is provided with a fourth through hole; The stud is sleeved on the fourth through hole and presses the pressing block tightly on the second pressing plate; The second pressing plate and the pressing block are both embedded in the second groove structure.

2. The anchoring structure according to claim 1, characterized in that: The secondary anchoring plate includes a connecting plate; The connecting plate is provided with a plurality of riveting holes for riveting the secondary anchoring plate to the secondary plywood.

3. The anchoring structure according to claim 2, characterized in that: The first pressing plate is welded to the secondary film.

4. The anchoring structure according to claim 1, characterized in that: The nut is welded on the main film.

5. The anchoring structure according to any one of claims 1 to 4, characterized in that: The second pressing plate is detachably connected to the stud.

6. A thin film system, characterized in that: include: Insulation layer, secondary plywood, secondary film, primary plywood, primary film and anchoring structure as described in any one of claims 1 to 5; The anchoring structure is used to connect and fix the thermal insulation layer, the secondary plywood, the secondary film, the primary plywood and the primary film.

7. A liquefied gas storage tank, characterized in that: Comprising the film system as claimed in claim 6.

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