Film enclosure system, mounting method thereof and storage container

Abstract

The invention discloses a thin film enclosure system and an installation method and a storage container thereof, and relates to the field of composite heat insulation structures of thin film enclosures, the thin film enclosure system comprises a secondary shielding film, a primary shielding film, a primary heat insulation layer and a secondary heat insulation layer which are stacked on the surface of a base material layer, the secondary shielding film and the primary shielding film play a role in leakage prevention, and the secondary shielding film and the primary heat insulation layer play a role in heat insulation. Through the composite structure of the secondary shielding film, the main shielding film, the main heat insulation layer and the secondary heat insulation layer, the shielding performance and the heat insulation performance of the base material layer can be improved, and under the action of the elastic fastening unit, the heat insulation effect of the base material layer can be improved. And when the main heat insulation layer and the secondary heat insulation layer are aged and shrunk in the later period, the stability of connection between the composite structure and the base material layer can be ensured under the action of the elastic fastening unit.

Description

Technical Field

[0001] The present invention relates to the field of composite adiabatic structures enclosed by thin films, and particularly to a thin film enclosure system, an installation method thereof, and a storage container. Background Art

[0002] The thin film enclosure system is mainly applied to liquefied natural gas storage tanks (vessels) and the construction field. Through the synergistic effect of the main screen wall, the secondary screen wall, and the thermal insulation layer, the thermal insulation and isolation of liquefied natural gas are achieved, ensuring the safety of its storage and transportation at ultra-low temperatures. The thermal insulation layer is an adiabatic module, and the adiabatic module has both low-temperature thermal insulation performance and compressive performance.

[0003] When the thermal insulation layer, the main shield, and the secondary shield are compositely installed on the base material, the thin film enclosure system is mainly installed by means of resin mortar and bolt anchoring. The installation method of bolt anchoring is a rigid fixed type. Since the materials of the adiabatic module (i.e., the thermal insulation layer) include not only rigid composite materials but also flexible porous materials (such as polyurethane foam, etc.), the flexible porous materials will shrink and age after long-term use, which will microscopically reduce the distance between the main shield and the secondary shield. However, due to the fixed distance of bolt anchoring, loosening will also occur between the thin film enclosure system and the bolt anchoring. Summary of the Invention

[0004] The purpose of the present invention is to provide a thin film enclosure system, an installation method thereof, and a storage container to solve the problems raised in the above background art.

[0005] To achieve the above purpose, the present invention provides the following technical solution: A thin film enclosure system includes: a secondary shield film, a main shield film, a secondary thermal insulation layer, a main thermal insulation layer, and the four are stacked on the surface of the base material layer. The secondary shield film and the main shield film play a role in preventing leakage, and the secondary thermal insulation layer and the main thermal insulation layer play a role in thermal insulation. A connecting member is also provided between the secondary shield film, the main shield film, the secondary thermal insulation layer, and the main thermal insulation layer; An elastic fastening unit for fixing the secondary shield film, the main shield film, the secondary thermal insulation layer, the main thermal insulation layer, and the base material layer.

[0006] Preferably, the secondary thermal insulation layer is located on the side of the main thermal insulation layer close to the base material layer, the secondary shield film is located between the secondary thermal insulation layer and the main thermal insulation layer, and the main shield film is located on the side of the main thermal insulation layer away from the secondary shield film. The connecting member includes plywood fixed on both sides of the secondary thermal insulation layer and the main thermal insulation layer. The plywood closest to the base material layer is connected to the base material layer through resin mortar. The secondary shield film is clamped by two adjacent plywood, and the main shield film is located on the top layer.

[0007] Preferably, at least one installation cavity hole is provided inside the secondary heat-insulating layer and the primary heat-insulating layer. The elastic fastening unit includes an anchoring screw located inside the installation cavity hole, and the anchoring screw slidably penetrates through the secondary shielding film and the plywood. An anchoring point is provided at one end of the anchoring screw away from the primary shielding film, and the end of the anchoring screw is fixed inside the anchoring point. The anchoring point and the anchoring screw are coaxially distributed, and the anchoring screw is fixed inside the anchoring point. A fixing sleeve is also distributed inside the installation cavity hole, and the fixing sleeve is located on the side of the anchoring screw away from the base material layer. A clamping disc is fixedly sleeved on the outer surface of the fixing sleeve, and the clamping disc is slidably attached to the end face of the primary shielding film. One end of the fixing sleeve away from the base material layer slidably penetrates through the primary shielding film and the plywood, and an elastic sleeving component is provided between the fixing sleeve and the anchoring screw.

[0008] Preferably, the anchoring point is fixed on the surface of the plywood close to the base material layer, and the anchoring point is located on the side of the plywood close to the primary shielding film.

[0009] Preferably, the anchoring point is fixed on the surface of the base material layer, and the anchoring point is located on the side of the base material layer close to the primary shielding film.

[0010] Preferably, the elastic sleeving component includes a threaded collar located at one end of the fixing sleeve close to the base material layer. The threaded collar is threadedly assembled with the anchoring screw. The inside of the fixing sleeve is hollow, and a through hole is provided at the bottom of the fixing sleeve. The inner diameter of the through hole is larger than the outer diameter of the anchoring screw. A connecting sliding disc is slidably arranged inside the fixing sleeve, and a first tension spring is fixedly arranged between one end of the connecting sliding disc away from the threaded collar and the fixing sleeve. At least two positioning rods are fixedly arranged at one end of the connecting sliding disc away from the first tension spring. The positioning rods all slidably penetrate through the fixing sleeve and are fixed to the threaded collar. The positioning rods are distributed around the through hole.

[0011] Preferably, a filling material is added inside the installation cavity hole, and the filling material fills the space between the anchoring screw or the fixing sleeve and the installation cavity hole.

[0012] Preferably, a wrench notch is provided on the upper end face of the fixing sleeve, and the wrench notch is an internal hexagonal notch.

[0013] Preferably, an anti-rotation component is further provided between the clamping disc and the main shielding film. The anti-rotation component is used to prevent the fixed sleeve from rotating. The anti-rotation component includes a limiting disc embedded in the end face of the main shielding film away from the secondary shielding film, and the limiting disc is flush with the end face of the main shielding film away from the secondary shielding film. At least one limiting cavity is formed inside the clamping disc, and a sliding block is slidably assembled inside the limiting cavity. A positioning pin shaft is fixedly arranged on the end face of the sliding block close to the secondary shielding film, and the positioning pin shaft extends out of the limiting cavity. A second tension spring is fixedly arranged between the end face of the sliding block close to the secondary shielding film and the limiting cavity. A plurality of limiting straight grooves are formed on the end face of the limiting disc away from the secondary shielding film and are evenly distributed in a circumferential manner. The positioning pin shaft is movably embedded inside the limiting straight grooves. The limiting straight grooves are rectangular, and a chamfering portion is arranged on one end face of the limiting straight grooves.

[0014] Preferably, the clamping disc is made of hard plastic material, and the sliding block is made of magnetic material. By magnetically attracting the sliding block with a magnet, the second tension spring can be stretched, and the positioning pin shaft can be withdrawn from the limiting straight groove.

[0015] Preferably, the number of the limiting straight grooves is a multiple of the number of the positioning pin shafts. If the number of the positioning pin shafts is two or more, and the plurality of positioning pin shafts are evenly distributed in a circumferential manner.

[0016] An installation method for a film enclosure system, the method comprising the following steps: S1. Stacking stage: Plywood is bonded to both pairs of side faces of the secondary insulation layer and the main insulation layer. The secondary shielding film is placed between the secondary insulation layer and the main insulation layer, and the secondary shielding film is separated from the secondary insulation layer and the main insulation layer by plywood. The main shielding film and the main insulation layer are also separated by plywood. S2. Installation stage: Fix the anchor screw to the anchor point, and make the anchor screw pass through the installation cavity holes in the secondary insulation layer and the main insulation layer. Threadedly assemble the threaded collar at the end of the fixed sleeve with the anchor screw, and rotate the fixed sleeve to stretch the first tension spring, so as to complete the elastic limit fixation of the secondary shielding film, the main shielding film, a plurality of plywoods, the secondary insulation layer and the main insulation layer. S3. Preventing the fixed sleeve from rotating and loosening stage: During the rotational assembly process of the fixed sleeve, the rotation of the clamping disc can be avoided by the restriction of the positioning pin shaft by the limiting straight groove.

[0017] A storage container, and a film enclosure system is applied in the storage container.

[0018] Compared with the prior art, the beneficial effects of the present invention are: Through the composite structure of the secondary shielding film, the main shielding film, the main heat-insulating layer, and the secondary heat-insulating layer, the present invention can improve the shielding performance and heat-insulating performance of the substrate layer. Moreover, under the action of the elastic fastening unit, even if the main heat-insulating layer and the secondary heat-insulating layer show aging shrinkage in the later stage, the elastic fastening unit can ensure the stability of the connection between the composite structure and the substrate layer. BRIEF DESCRIPTION OF THE DRAWINGS

[0019] Figure 1 is a schematic diagram of the overall structure of the present invention; Figure 2 is a schematic diagram of the installation cavity hole structure of the present invention; Figure 3 is a schematic diagram of the internal structure of the fixing sleeve of the present invention; Figure 4 is a schematic diagram of the position distribution of the anchor points of the present invention installed on the plywood; Figure 5 is a schematic diagram of the structure of the clamping disc and the limiting disc of the present invention; Figure 6 is a schematic diagram of the structure of the limiting straight groove and the chamfered part of the present invention; Figure 7 The present invention Figure 6 is an enlarged view at position A in; Figure 8 is a schematic diagram of the position distribution of the anchor points of the present invention installed on the substrate layer; Figure 9 is a schematic diagram of the structure in which the plywood and the substrate layer are fixed by bolts in the present invention.

[0020] In the figure: 1. Secondary shielding film; 2. Main shielding film; 3. Plywood; 4. Secondary heat-insulating layer; 5. Main heat-insulating layer; 6. Installation cavity hole; 7. Anchor screw; 8. Fixing sleeve; 9. Threaded collar; 10. Connecting sliding disc; 11. Positioning rod; 12. First tension spring; 13. Hexagonal socket; 14. Clamping disc; 15. Limiting disc; 16. Limiting straight groove; 17. Chamfered part; 18. Limiting cavity; 19. Sliding block; 20. Positioning pin; 21. Second tension spring; 22. Substrate layer; 23. Anchor point; 24. Resin mortar; 25. Filling material. DETAILED DESCRIPTION OF THE EMBODIMENTS

[0021] Next, the technical solutions in the embodiments of the present invention will be clearly and completely described in conjunction with the accompanying drawings in the embodiments of the present invention. Obviously, the described embodiments are only a part of the embodiments of the present invention, rather than all the embodiments. Based on the embodiments of the present invention, all other embodiments obtained by those of ordinary skill in the art without creative efforts shall fall within the protection scope of the present invention.

[0022] Embodiment 1: Please refer to Figures 1-5 and Figure 9, A film enclosure system in the illustration, comprising: a secondary shielding film 1, a primary shielding film 2, a secondary heat-insulating layer 4, and a primary heat-insulating layer 5, and the four are stacked on the surface of the substrate layer 22. The secondary shielding film 1 and the primary shielding film 2 play a role in preventing leakage, and the secondary heat-insulating layer 4 and the primary heat-insulating layer 5 play a role in heat insulation. A connecting member is also provided between the secondary shielding film 1, the primary shielding film 2, the secondary heat-insulating layer 4, and the primary heat-insulating layer 5; An elastic fastening unit for fixing the secondary shielding film 1, the primary shielding film 2, the secondary heat-insulating layer 4, the primary heat-insulating layer 5 and the substrate layer 22.

[0023] The secondary heat-insulating layer 4 is located on the side of the primary heat-insulating layer 5 close to the substrate layer 22. The secondary shielding film 1 is located between the secondary heat-insulating layer 4 and the primary heat-insulating layer 5, and the primary shielding film 2 is located on the side of the primary heat-insulating layer 5 away from the secondary shielding film 1. Plywood 3 is fixedly provided on both sides of the secondary heat-insulating layer 4 and the primary heat-insulating layer 5. The plywood 3 closest to the substrate layer 22 is connected to the substrate layer 22 through resin mortar 24. The secondary shielding film 1 is clamped by two plywood 3s close to each other. The primary shielding film 2 is located on the top layer. The secondary shielding film 1 and the primary shielding film 2 form a double shielding layer. The superimposed use of the secondary heat-insulating layer 4 and the primary heat-insulating layer 5 achieves a better heat insulation effect.

[0024] At least one installation cavity hole 6 is provided inside the secondary heat-insulating layer 4 and the primary heat-insulating layer 5. The elastic fastening unit includes an anchor screw 7 located inside the installation cavity hole 6, and the anchor screw 7 slidably penetrates through the secondary shielding film 1 and the plywood 3. An anchor point 23 is provided at one end of the anchor screw 7 away from the primary shielding film 2. The end of the anchor screw 7 is fixed inside the anchor point 23. The anchor point 23 and the anchor screw 7 are coaxially distributed. The anchor screw 7 is fixed inside the anchor point 23. Fixed sleeves 8 are also distributed inside the installation cavity hole 6, and the fixed sleeves 8 are located on the side of the anchor screw 7 away from the substrate layer 22. A clamping disc 14 is fixedly sleeved on the outer surface of the fixed sleeve 8, and the clamping disc 14 slidably fits with the end face of the primary shielding film 2. One end of the fixed sleeve 8 away from the substrate layer 22 slidably penetrates through the primary shielding film 2 and the plywood 3. An elastic sleeving member is provided between the fixed sleeve 8 and the anchor screw 7. The anchor screw 7 and the fixed sleeve 8 fix the secondary shielding film 1, the primary shielding film 2, the secondary heat-insulating layer 4, the primary heat-insulating layer 5 and the substrate layer 22 through the elastic sleeving member.

[0025] The anchor point 23 is fixed on the surface of the plywood 3 close to the substrate layer 22, and the anchor point 23 is located on the side of the plywood 3 close to the primary shielding film 2.

[0026] The elastic sleeve component includes a threaded collar 9 located at one end of the fixed sleeve 8 close to the base material layer 22. The threaded collar 9 is in threaded assembly with the anchoring screw 7. The interior of the fixed sleeve 8 is hollow, and a through hole is provided at the bottom of the fixed sleeve 8. The inner diameter of the through hole is larger than the outer diameter of the anchoring screw 7. A connecting sliding disk 10 is slidably arranged inside the fixed sleeve 8, and a first tension spring 12 is fixedly arranged between one end of the connecting sliding disk 10 away from the threaded collar 9 and the fixed sleeve 8. At least two positioning rods 11 are fixedly arranged at one end of the connecting sliding disk 10 away from the first tension spring 12. The positioning rods 11 all slidably penetrate through the fixed sleeve 8 and are fixed to the threaded collar 9. The positioning rods 11 are distributed around the through hole. The fixed sleeve 8 drives the threaded collar 9 to rotate through the positioning rods 11. Since the anchoring screw 7 is fixed, the threaded collar 9 can move towards the base material layer 22, and the first tension spring 12 is stretched through the connecting sliding disk 10. The reaction elastic force generated by the stretching can be applied to the surface of the main shielding film 2 through the clamping disk 14, thereby completing the fixation of the secondary shielding film 1, the main shielding film 2, the secondary heat insulation layer 4, the main heat insulation layer 5 and the base material layer 22.

[0027] Filling material 25 is added inside the installation cavity hole 6. The filling material 25 fills the space between the anchoring screw 7 or the fixed sleeve 8 and the installation cavity hole 6. The filling material 25 is an insulating material.

[0028] A wrench notch is provided on the upper end surface of the fixed sleeve 8. The wrench notch is an internal hexagonal notch 13. By fitting a hexagonal wrench with the internal hexagonal notch 13, the fixed sleeve 8 can be rotated.

[0029] Embodiment Two: Please refer to Figure 8 , this embodiment is a further description of the above Embodiment One. The anchoring point 23 is fixed on the surface of the base material layer 22, and the anchoring point 23 is located on the side of the base material layer 22 close to the main shielding film 2.

[0030] Embodiment Three: Please refer to Figures 5-7, This embodiment is a further illustration of the above-mentioned Embodiment 1. An anti-rotation component is also provided between the clamping disc 14 and the main shielding film 2. The anti-rotation component is used to prevent the fixed sleeve 8 from rotating. The anti-rotation component includes a limit disc 15 embedded in the end face of the main shielding film 2 away from the secondary shielding film 1, and the limit disc 15 is flush with the end face of the main shielding film 2 away from the secondary shielding film 1. At least one limit cavity 18 is opened inside the clamping disc 14, and a sliding block 19 is slidably assembled inside the limit cavity 18. A positioning pin 20 is fixedly arranged on the end face of the sliding block 19 close to the secondary shielding film 1, and the positioning pin 20 extends out of the limit cavity 18. A second tension spring 21 is fixedly arranged between the end face of the sliding block 19 close to the secondary shielding film 1 and the limit cavity 18. A plurality of limit straight grooves 16 evenly distributed at equal intervals in a circle are opened on the end face of the limit disc 15 away from the secondary shielding film 1, and the positioning pin 20 is movably embedded inside the limit straight grooves 16. The limit straight grooves 16 are rectangular, and a chamfering part 17 is arranged on one end face of the limit straight grooves 16. When the clamping disc 14 drives the sliding block 19 and the positioning pin 20 to rotate following the fixed sleeve 8, the positioning pin 20 can move out of the limit straight grooves 16 under the action of the chamfering part 17, and during the movement, due to the elastic pressure of the second tension spring 21, the positioning pin 20 is embedded inside another limit straight groove 16.

[0031] The clamping disc 14 is made of hard plastic material, and the sliding block 19 is made of magnetic material. By magnetically attracting the sliding block 19 with a magnet, the second tension spring 21 can be stretched, and the positioning pin 20 can be withdrawn from the limit straight grooves 16.

[0032] The number of the limit straight grooves 16 is a multiple of the number of the positioning pins 20. If the number of the positioning pins 20 is two or more, and the multiple positioning pins 20 are evenly distributed at equal intervals in a circle, through the engagement of the multiple positioning pins 20 and the limit straight grooves 16, the situation that the clamping disc 14 does not rotate can be further avoided.

[0033] Working principle: Arrange the secondary shielding film 1, the main shielding film 2, the plywood 3, the secondary heat insulation layer 4 and the main heat insulation layer 5 in accordance with Figure 4In the middle method, it is compoundly stacked on the surface of the base material layer 22. It should be noted that for the plywood 3 closely attached to the base material layer 22, the two are bonded and fixed through the resin mortar 24. Later, the plywood 3 and the base material layer 22 can also be fixed by the double-headed bolts. During the stacking process, the anchor screw 7 passes through the installation cavity hole 6, and the threaded collar 9 at the end of the fixed sleeve 8 can contact the end of the anchor screw 7. At this time, by fitting the wrench with the internal hexagonal notch 13, the fixed sleeve 8 is rotated. Through the threaded assembly of the threaded collar 9 and the anchor screw 7, the fixed sleeve 8 drives the clamping disc 14 to gradually approach the surface of the main shielding film 2. After the clamping disc 14 is attached to the main shielding film 2, the rotation of the fixed sleeve 8 continues. Since the position of the fixed sleeve 8 cannot change, the threaded collar 9 will pull the connecting sliding disc 10 through the positioning rod 11, stretching the first tension spring 12. The reaction elastic force generated by the stretching of the first tension spring 12 will be applied between the anchor screw 7 and the fixed sleeve 8, so as to perform elastic limit treatment on the composite formed film enclosure system. Through this elastic fixing method, when the thermal insulation layer 4 and the main thermal insulation layer 5 age and shrink this time, the stability of the connection between the film enclosure system and the base material layer 22 can still be ensured, and no loosening will occur.

[0034] In this solution, when the clamping disc 14 is attached to the main shielding film 2 and rotates, the positioning pin 20 can be embedded into the internal of the limit straight groove 16 under the action of the second tension spring 21, and will switch into the internal of other limit straight grooves 16 under the guidance of the chamfered portion 17. However, precisely because of the engagement between the positioning pin 20 and the limit straight groove 16, the situation of the positioning pin 20 rotating back can be avoided, that is, the situation of the clamping disc 14 and the fixed sleeve 8 rotating back can be ensured, thus ensuring the stability of the connection between the fixed sleeve 8 and the anchor screw 7, and moreover, it can also play an anti-rotation-back and anti-theft effect.

[0035] It should be noted that in this article, relational terms such as first and second are only used to distinguish one entity or operation from another entity or operation, and do not necessarily require or imply any such actual relationship or order between these entities or operations. Moreover, the term "comprising", "including" or any other variant thereof is intended to cover non-exclusive inclusion, so that a process, method, article or device including a series of elements not only includes those elements, but also includes other elements not expressly listed, or also includes elements inherent to such process, method, article or device.

[0036] Although the embodiments of the present invention have been shown and described, for those of ordinary skill in the art, it can be understood that various changes, modifications, substitutions and variations can be made to these embodiments without departing from the principles and spirit of the present invention. The scope of the present invention is defined by the appended claims and their equivalents.

Claims

1. A film enclosure system, characterized in that: include: A secondary shielding film (1), a primary shielding film (2), a secondary heat-insulating layer (4), and a primary heat-insulating layer (5), and the four are stacked and placed on the surface of a substrate layer (22); the secondary shielding film (1) and the primary shielding film (2) play a role in preventing leakage, the secondary heat-insulating layer (4) and the primary heat-insulating layer (5) play a role in heat insulation, and connecting parts are also provided between the secondary shielding film (1), the primary shielding film (2), the secondary heat-insulating layer (4), and the primary heat-insulating layer (5); An elastic fastening unit is used to fix the secondary shielding film (1), the primary shielding film (2), the secondary thermal insulation layer (4), the primary thermal insulation layer (5) and the base material layer (22).

2. A film enclosure system according to claim 1, characterized in that: The secondary insulation layer (4) is located on a side of the primary insulation layer (5) close to the substrate layer (22), the secondary shielding membrane (1) is located between the secondary insulation layer (4) and the primary insulation layer (5), and the primary shielding membrane (2) is located on a side of the primary insulation layer (5) away from the secondary shielding membrane (1), and the connecting member comprises plywood (3) fixed on both sides of the secondary insulation layer (4) and the primary insulation layer (5), and the plywood (3) closest to the substrate layer (22) is connected to the substrate layer (22) by resin glue (24).

3. A film enclosure system according to claim 2, characterized in that: The secondary insulation layer (4) and the primary insulation layer (5) are each provided with at least one mounting cavity (6), the elastic fastening unit comprises an anchoring screw (7) located inside the mounting cavity (6), and the anchoring screw (7) slides through the secondary shielding membrane (1) and the plywood (3), an anchoring point (23) is provided at one end of the anchoring screw (7) away from the primary shielding membrane (2), the end of the anchoring screw (7) is fixed inside the anchoring point (23), a fixing sleeve (8) is also distributed inside the mounting cavity (6), a buckling plate (14) is fixedly sleeved on the outer surface of the fixing sleeve (8), and the buckling plate (14) is slidably fitted with the end surface of the primary shielding membrane (2), the fixing sleeve (8) slides through the primary shielding membrane (2) and the plywood (3), and an elastic sleeve component is provided between the fixing sleeve (8) and the anchoring screw (7).

4. A film enclosure system according to claim 3, characterized in that: The anchor point (23) is fixed on the surface of the plywood (3) close to the base material layer (22), and the anchor point (23) is located on a side of the plywood (3) close to the main shielding film (2).

5. A film enclosure system according to claim 3, characterized in that: The anchor point (23) is fixed on the surface of the substrate layer (22), and the anchor point (23) is located on a side of the substrate layer (22) close to the main shielding film (2).

6. A film enclosure system according to claim 3, characterized in that: The elastic sleeve component comprises a threaded collar (9) located at one end of the fixed sleeve (8) close to the base material layer (22), the threaded collar (9) and the anchor screw (7) are threadedly assembled, the interior of the fixed sleeve (8) is hollow, and a through hole is opened at the bottom of the fixed sleeve (8), the inner diameter of the through hole is larger than the outer diameter of the anchor screw (7), a connecting slide plate (10) is slidably arranged inside the fixed sleeve (8), and a first tension spring (12) is fixedly arranged between the end of the connecting slide plate (10) away from the threaded collar (9) and the fixed sleeve (8), and at least two positioning rods (11) are fixedly arranged at one end of the connecting slide plate (10) away from the first tension spring (12), the positioning rods (11) all slide through the fixed sleeve (8), and the positioning rods (11) are fixed to the threaded collar (9).

7. A film enclosure system according to claim 3, characterized in that: An anti-rotation component is also provided between the buckling plate (14) and the primary shielding membrane (2), the anti-rotation component comprising a limiting plate (15) mounted on an end face of the primary shielding membrane (2) away from the secondary shielding membrane (1), at least one limiting cavity (18) is provided inside the buckling plate (14), and a sliding block (19) is slidably mounted inside the limiting cavity (18), a positioning pin (20) is fixedly provided on the sliding block (19) close to an end face of the secondary shielding membrane (1), and the positioning pin (20) extends out of the limiting cavity ( 18), a second tension spring (21) is fixedly arranged between one end surface of the sliding block (19) close to the secondary shielding membrane (1) and the limiting cavity (18), and one end surface of the limiting plate (15) away from the secondary shielding membrane (1) is provided with a plurality of limiting straight grooves (16) equidistantly distributed in a circumference, and the positioning pin shaft (20) is movably embedded in the interior of the limiting straight groove (16), and one end surface of the limiting straight groove (16) is provided with a chamfered portion (17), and the number of the limiting straight grooves (16) is a multiple of the number of the positioning pin shafts (20).

8. A membrane enclosure system according to claim 7, characterized in that: The buckling plate (14) is made of hard plastic material, and the sliding block (19) is made of magnetic material.

9. A method for installing a membrane enclosure system according to any one of claims 1 to 8, characterized in that: The method comprises the following steps: S1, stacking stage, plywood (3) is bonded to two pairs of side surfaces of the secondary insulation layer (4) and the primary insulation layer (5), and the secondary shielding membrane (1) is placed between the secondary insulation layer (4) and the primary insulation layer (5), and the secondary shielding membrane (1) is separated from the secondary insulation layer (4) and the primary insulation layer (5) by the plywood (3), and the primary shielding membrane (2) is also separated from the primary insulation layer (5) by the plywood (3); S2, during the installation phase, the anchoring screw (7) is fixed to the anchoring point (23), and the anchoring screw (7) is passed through the installation cavity (6) in the secondary insulation layer (4) and the primary insulation layer (5), and the threaded collar (9) at the end of the fixing sleeve (8) is threadedly assembled with the anchoring screw (7), and the fixing sleeve (8) is rotated so that the first tension spring (12) is stretched, thereby completing the elastic limiting fixation of the secondary shielding membrane (1), the primary shielding membrane (2), the plurality of plywood sheets (3), the secondary insulation layer (4) and the primary insulation layer (5); S3, in the stage of preventing the fixed sleeve (8) from rotating and loosening, during the rotating assembly process, the fixed sleeve (8) can prevent the buckling plate (14) from rotating by limiting the positioning pin shaft (20) through the limiting straight groove (16).

10. A storage container, characterized in that: A film enclosure system as described in any one of claims 1 to 8 is used in the storage container.

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