Simple anchoring structure for membrane enclosure system and membrane enclosure system

Abstract

The application discloses a simple anchoring structure for a thin film enclosure system and the thin film enclosure system. The anchoring structure comprises an insulation box and a sliding anchoring strip. The insulation box comprises an insulation layer, and upper and lower support plates arranged on the upper and lower sides of the insulation layer. An installation groove is arranged on the upper support plate. The sliding anchoring strip is arranged in the installation groove. The sliding anchoring strip and the upper support plate are connected through a sliding connecting piece. The sliding connecting piece comprises a limiting protrusion and a guide groove. The limiting protrusion is arranged on one of the sliding anchoring strip and the upper support plate, and the guide groove is arranged on the other one. The limiting protrusion is embedded in the guide groove and can slide in the length direction of the sliding anchoring strip in the guide groove. The application has the advantages of simple structure, low processing cost, no need for accurate alignment during installation and convenient installation.

Description

Technical Field

[0001] This invention relates to the field of liquid cargo membrane storage tank technology, specifically to a simplified anchoring structure and membrane enclosure system for a membrane enclosure system. Background Technology

[0002] Membrane-type enclosure systems are a widely used type of enclosure structure in liquefied natural gas (LNG) carriers and land-based storage tanks. Their core principle is to achieve effective sealing and insulation of cryogenic liquid media through a combination of corrugated metal sheets and an insulating layer. In this system, the corrugated sheet acts as the main shield wall, directly contacting the cryogenic medium, while the insulating layer is positioned between the corrugated sheet and the outer tank body, serving the dual functions of thermal insulation and load-bearing. To ensure a reliable connection between the corrugated sheet and the insulating layer, and to allow for thermal expansion and contraction displacement of the corrugated sheet due to rapid temperature changes, sliding anchor strips are installed between them.

[0003] In the prior art, the sliding anchoring structure used to connect the corrugated plate and the insulation layer usually includes a T-shaped cross-section groove set on the insulation layer, and a matching anchoring strip interlocks with the T-shaped groove. The displacement compensation of the corrugated plate fixed with the anchoring strip relative to the insulation layer is achieved by sliding in the groove.

[0004] However, in practical applications, the sliding anchor bars with the aforementioned T-groove structure face challenges. Because the membrane enclosure system operates in extremely low-temperature environments for extended periods, the friction coefficient between the T-groove and the fixing components increases at low temperatures. This can lead to increased sliding resistance or even jamming, failing to effectively release the thermal stress generated by temperature fluctuations in the corrugated plate, thus affecting the structural safety and sealing reliability of the enclosure system. Furthermore, this structure not only requires T-grooves in the insulation layer but also necessitates changes to the shape of the anchor bars, increasing manufacturing costs. Given the large number of anchor bars used in membrane enclosure systems, even a small increase in the cost per unit can lead to a significant rise in the overall construction cost.

[0005] Therefore, it is necessary to provide a new type of sliding anchor strip that is simple in structure, easy to install, low in cost, and highly adaptable to low temperatures to meet the actual engineering needs of membrane-type enclosure systems. Summary of the Invention

[0006] The technical problem to be solved by the present invention is to provide a simplified anchoring structure and membrane enclosure system for membrane enclosure systems, so as to solve the problems of increased sliding resistance or even jamming at low temperatures, high processing costs, and complex installation of existing sliding anchoring structures.

[0007] To address the aforementioned technical problems, this invention provides a simplified anchoring structure for membrane enclosure systems, comprising:

[0008] An insulation box, the insulation box including a heat insulation layer and an upper support plate and a lower support plate that are attached to the upper and lower sides of the heat insulation layer, the upper support plate being provided with a mounting groove;

[0009] A sliding anchor strip is disposed within the mounting groove. The sliding anchor strip is connected to the upper support plate via a sliding connector. The sliding connector includes a limiting protrusion and a guide groove. The limiting protrusion is disposed on one of the sliding anchor strip and the upper support plate, and the guide groove is disposed on the other. The guide groove is aligned with the length direction of the sliding anchor strip. The limiting protrusion is embedded in the guide groove, causing the sliding anchor strip to displace relative to the upper support plate.

[0010] Furthermore, the limiting protrusion is a first rivet, and the guide groove is a first elongated hole provided on the sliding anchor bar. The first rivet passes through the first elongated hole and is locked to the lower surface of the upper support plate.

[0011] Furthermore, the limiting protrusion is a second rivet, and the guide groove is a second elongated hole disposed in the mounting groove and penetrating the upper support plate. The second rivet passes through the sliding anchor strip and the second elongated hole and abuts against the lower surface of the upper support plate.

[0012] Furthermore, the length of the first or second elongated hole is 2-5 mm larger than the diameter of the first or second rivet.

[0013] Furthermore, the limiting protrusion is a guide strip, which is fixed at the middle position of the bottom surface of the mounting groove, and the guide groove is a sliding groove provided on the lower surface of the sliding anchor strip, with the guide strip embedded in the sliding groove.

[0014] Furthermore, a lubricating layer is provided on the surface of the upper support plate.

[0015] Furthermore, the lubricating layer is a polytetrafluoroethylene film.

[0016] Furthermore, the mounting slots located on the same straight line are arranged in a continuous manner.

[0017] Furthermore, the insulation layer is a polyurethane layer, and both the upper support plate and the lower support plate are plywood.

[0018] The present invention also provides a membrane enclosure system, comprising, from the outside to the inside, a secondary insulation layer, a secondary shielding layer, a primary insulation layer, and a primary shielding layer. The secondary insulation layer and the primary insulation layer are formed by splicing together several of the above-mentioned anchoring structures. The insulation box is a square structure with equal length and width. The center of the insulation box is set as a fixed anchoring strip, and the sliding anchoring strip is set along the extension direction of the fixed anchoring strip. The apex corners of the corrugated plates of the secondary shielding layer and the primary shielding layer are connected to the fixed anchoring strips, and the side lengths of the corrugated plates are connected to the sliding anchoring strips. The apex corner of the insulation box corresponding to the primary insulation layer is connected to the secondary shielding layer by point anchoring connectors.

[0019] This invention uses a combination of a limiting protrusion and a guide groove to achieve the mobility of the anchoring strip, which has low processing requirements and significantly reduces manufacturing costs. The sliding connection structure used in this invention has fewer mating surfaces and controllable contact area. In extremely low temperature environments, the increase in frictional resistance is small, which can effectively release the thermal stress generated by temperature changes in the corrugated plate and ensure the structural safety and sealing reliability of the enclosure system. Attached Figure Description

[0020] Figure 1 This is a schematic diagram of the overall structure of Embodiment 1 of the present invention;

[0021] Figure 2 This is a cross-sectional view along the length of the sliding anchor bar in Embodiment 1 of the present invention;

[0022] Figure 3 This is a schematic diagram of the overall structure of Embodiment 2 of the present invention;

[0023] Figure 4 This is a cross-sectional view along the length of the sliding anchor bar in Embodiment 2 of the present invention;

[0024] Figure 5 This is a schematic diagram of the internal structure of the mounting slot in Embodiment 3 of the present invention;

[0025] Figure 6 This is a cross-sectional view along the width direction of the sliding anchor bar in Embodiment 3 of the present invention;

[0026] Figure 7 This is a schematic diagram of the enclosure system structure of the present invention.

[0027] Explanation of the labels in the diagram:

[0028] 10. Insulation box; 11. Insulation layer; 12. Upper support plate; 13. Lower support plate; 14. Mounting slot;

[0029] 20. Sliding anchor strip;

[0030] 30. Sliding connector; 31. First rivet; 311. Anchor head; 312. Rivet head; 32. First elongated hole; 33. Second rivet; 34. Second elongated hole; 35. Guide strip; 36. Slide groove;

[0031] 100. Secondary insulation layer; 110. Fixing anchor strip; 200. Secondary shielding layer; 210. Corrugated plate; 300. Primary insulation layer; 400. Primary shielding layer. Detailed Implementation

[0032] The present invention will be further described below with reference to the accompanying drawings and specific embodiments, so that those skilled in the art can better understand and implement the present invention. However, the embodiments described are not intended to limit the present invention.

[0033] Reference Figure 1 and Figure 2 The diagram shown is a schematic representation of an embodiment of a simplified anchoring structure for a membrane enclosure system according to the present invention.

[0034] The membrane enclosure system of the present invention uses a simple anchoring structure, including an insulating box 10 and a sliding anchoring strip 20.

[0035] The insulation box 10 includes an insulation layer 11 and an upper support plate 12 and a lower support plate 13 attached to the upper and lower sides of the insulation layer 11. In this embodiment, the insulation layer 11 is a polyurethane layer, and the upper support plate 12 and the lower support plate 13 are both plywood. The polyurethane layer has excellent thermal insulation performance and can effectively block the low-temperature medium from conducting heat outward; the plywood on the upper and lower sides provides structural support and protection for the polyurethane layer, and also serves as the mounting base for anchor strips and other connecting parts. The upper support plate 12 is provided with a mounting groove 14, which is used to accommodate the sliding anchor strip 20, so that the sliding anchor strip 20 is embedded in the upper support plate 12, maintaining the flatness of the upper surface of the insulation box 10 and preventing the anchor strip from protruding and affecting the adhesion and sealing between the corrugated plate 210 and the insulation box 10.

[0036] The sliding anchor strip 20 is disposed within the mounting groove 14. The sliding anchor strip 20 is connected to the upper support plate 12 via a sliding connector 30, which includes a limiting protrusion and a guide groove. The limiting protrusion is a protrusion disposed on one of the sliding anchor strip 20 and the upper support plate 12, serving a limiting and guiding function, including but not limited to protruding components such as rivets and guide strips 35. The guide groove is a groove-shaped structure disposed on the other of the sliding anchor strip 20 and the upper support plate 12, matching the shape of the limiting protrusion, including but not limited to oblong holes and sliding grooves 36. The length direction of the guide groove is consistent with the length direction of the sliding anchor strip 20. After the limiting protrusion is embedded in the guide groove, it is constrained in the direction perpendicular to the sliding direction, preventing the sliding anchor strip 20 from coming out of the mounting groove 14. At the same time, it retains a degree of freedom in the length direction of the sliding anchor strip 20, allowing the sliding anchor strip 20 to generate relative displacement on the upper support plate 12 with the thermal expansion and contraction of the corrugated plate 210, effectively releasing thermal stress.

[0037] Specifically, in this embodiment, the limiting protrusion is the first rivet 31, and the guide groove is the first elongated hole 32 provided on the sliding anchor strip 20. The first elongated hole 32 is provided along the length direction of the sliding anchor strip 20, that is, the long axis direction of the elongated hole is consistent with the extension direction of the sliding anchor strip 20. The first rivet 31 passes through the first elongated hole 32 and is locked to the lower surface of the upper support plate 12. That is, after the sliding anchor strip 20 is placed in the mounting groove 14, the first rivet 31 passes through the first elongated hole 32 on the sliding anchor strip 20 from above under the action of external force, passes through the upper support plate 12 and inserts into the polyurethane layer. The first rivet 31 undergoes plastic upsetting at the connection position between the polyurethane layer and the upper support plate 12 to form an upset head. The rivet head 312 of the first rivet 31 and the newly formed upset head clamp the sliding anchor strip 20 and the upper support plate 12 from both ends, and realize the firm locking of the first rivet 31 and the upper support plate 12. The shank of the first rivet 31 is located inside the first elongated hole 32. The width of the first elongated hole 32 is approximately equal to the diameter of the shank of the first rivet 31. Therefore, the rivet head 312 can at least lock onto both sides of the width of the first elongated hole 32. Since the length of the first elongated hole 32 is greater than the diameter of the first rivet 31, the sliding anchoring strip 20 can slide relative to the first rivet 31 and the upper support plate 12 within the allowable range of the first elongated hole 32, thereby achieving the displacement compensation function.

[0038] In this embodiment, the length of the first elongated hole 32 is 2-5mm larger than the diameter of the first rivet 31, meaning the sliding anchor strip 20 can slide 2-5mm relative to the upper support plate 12. This sliding distance matches the actual thermal expansion and contraction displacement of the corrugated plate 210 under alternating temperature conditions in the membrane enclosure system. This ensures the full realization of the displacement compensation function while avoiding excessive sliding stroke that could increase the gap between the anchor strip and the mounting groove 14, thus affecting connection stability. Furthermore, in this embodiment, to facilitate the opening of multiple mounting grooves 14, the mounting grooves 14 located on the same straight line are continuously arranged. Simultaneously, in the membrane enclosure system, multiple insulation boxes 10 are arranged and spliced ​​along the same direction. The continuously arranged mounting grooves 14 also allow the sliding anchor strip 20 to be continuously installed, preventing the anchor strip from breaking at the junction of the insulation boxes 10, thus avoiding discontinuity in the displacement compensation of the corrugated plate 210 and ensuring the integrity of the sliding function of the entire enclosure system.

[0039] Compared to conventional anchoring structures, the rivet fixing method in this embodiment is the same as that in the traditional insulation box 10, without changing the manufacturing process of the insulation box 10. Furthermore, the mounting holes on the upper support plate 12 are still round holes that match the diameter of the rivets, so the structural integrity of the upper support plate 12 is minimally affected. At the same time, it is only necessary to change the original round hole opening process to the oblong hole opening process in the anchoring strip processing stage, which requires very little process modification and has a limited increase in cost.

[0040] Reference Figure 3 and Figure 4 The diagram shown is a schematic representation of a second embodiment of a simplified anchoring structure for a membrane enclosure system according to the present invention.

[0041] In this embodiment, the limiting protrusion is the second rivet 33, and the guide groove is the second elongated hole 34 disposed in the mounting groove 14 and penetrating the upper support plate 12. The second elongated hole 34 is disposed along the length direction of the sliding anchor bar 20, i.e., the length direction of the mounting groove 14, so that the major axis of the elongated hole is consistent with the extension direction of the sliding anchor bar 20 and the mounting groove 14. The second rivet 33 passes through the sliding anchor bar 20 and the second elongated hole 34 and abuts against the lower surface of the upper support plate 12. During installation, the second rivet 33 passes downward from above the sliding anchor strip 20 through the mounting hole on the sliding anchor strip 20, then through the second elongated hole 34 on the upper support plate 12 and inserts into the polyurethane layer. The second rivet 33 undergoes plastic upsetting at the connection point between the polyurethane layer and the upper support plate 12, forming an upset head. The rivet head 312 and the newly formed upset head clamp the sliding anchor strip 20 and the upper support plate 12 from both ends. Since the width of the second elongated hole 34 is approximately equal to the diameter of the second rivet 33, the upset head 311 can at least hold both sides of the width of the second elongated hole 34. Because the length of the second elongated hole 34 is greater than the diameter of the second rivet 33, the second rivet 33, together with the sliding anchor strip 20, can slide relative to the upper support plate 12 along the length direction of the mounting groove 14 within the allowable range of the second elongated hole 34. In this embodiment, the length of the second elongated hole 34 is also 2-5 mm larger than the diameter of the second rivet 33, so as to provide the sliding anchor strip 20 with a sliding stroke that matches the thermal expansion and contraction displacement of the corrugated plate 210.

[0042] Compared to conventional anchoring structures, in this embodiment, the mounting holes on the sliding anchoring strip 20 are round holes that match the diameter of the rivets. The processing technology of the anchoring strip remains unchanged. The second rivet 33 is fixed and rigidly connected to the sliding anchoring strip 20. The second elongated hole 34 on the upper support plate 12 provides the degree of freedom for sliding. Therefore, it is only necessary to change the original round hole opening process on the upper support plate 12 to the elongated hole opening process. The process modification is minimal and the cost increase is limited.

[0043] Reference Figure 5 and Figure 6 The diagram shown is a schematic representation of a simplified anchoring structure for a membrane enclosure system according to the present invention.

[0044] In this embodiment, the limiting protrusion is a guide strip 35, which is fixed at the center of the bottom surface of the mounting groove 14. The guide groove is a sliding groove 36 provided on the lower surface of the sliding anchor strip 20, and the guide strip 35 is embedded in the sliding groove 36. Specifically, the guide strip 35 is a strip-shaped member with an inverted trapezoidal cross-section, fixed at the center of the bottom surface of the mounting groove 14 on the upper support plate 12. The width of the guide strip 35 is smaller than the width of the mounting groove 14 and also smaller than the width of the sliding anchor strip 20, so that there is a gap between the two sides of the guide strip 35 and the side wall of the mounting groove 14, which does not affect the embedding of the sliding anchor strip 20 in the mounting groove 14. The inverted trapezoidal cross-section of the guide bar 35 makes it wider at the top and narrower at the bottom. After engaging with the groove 36 on the lower surface of the sliding anchor bar 20, the guide bar 35 constrains the sliding anchor bar 20 in the vertical direction, preventing the sliding anchor bar 20 from coming out of the mounting groove 14. At the same time, in the length direction of the sliding anchor bar 20, the guide bar 35 and the groove 36 are in a sliding fit, allowing the sliding anchor bar 20 to move freely along the length direction.

[0045] The groove 36 is provided on the lower surface of the sliding anchor strip 20. The cross-sectional shape of the groove 36 matches the inverted trapezoidal cross-section of the guide strip 35, so that the guide strip 35 is embedded in the groove 36 and the two fit together tightly, with only a sliding gap in the length direction. The groove 36 extends along the entire length of the sliding anchor strip 20, which facilitates the insertion of the sliding anchor strip 20 into the mounting groove 14.

[0046] In this embodiment, the guide strip 35 and the slide groove 36 cooperate to achieve a sliding connection, eliminating the need for rivets and oblong holes, making the connection method simpler. The guide strip 35 is fixed to the upper support plate 12 and cannot move. The sliding anchor strip 20 slides on the guide strip 35 through the slide groove 36 to achieve displacement compensation. During installation, simply push the sliding anchor strip 20 into the mounting groove 14 from the end to align the slide groove 36 with the guide strip 35; the operation is extremely simple.

[0047] Furthermore, a lubricating layer, which can be a polytetrafluoroethylene (PTFE) film, is provided on the surface of the upper support plate 12. PTFE has an extremely low coefficient of friction and maintains excellent lubrication performance even at extremely low temperatures. Adhering or coating the PTFE film to the surface of the upper support plate 12, located between the corrugated plate 210 and the upper support plate 12, effectively reduces the sliding friction resistance between them, ensuring that the corrugated plate 210 and the sliding anchor strip 20 can slide smoothly on the upper support plate 12 during thermal expansion and contraction. The thickness of the PTFE film is determined according to the actual friction resistance requirements and structural space, typically 0.1-0.5 mm, providing sufficient lubrication without affecting the normal embedding and sliding of the sliding anchor strip 20 within the mounting groove 14.

[0048] Reference Figure 7As shown, the present invention also provides a thin-film enclosure system, which includes, from the outside to the inside, a secondary insulating layer 100, a secondary shielding layer 200, a primary insulating layer 300, and a primary shielding layer 400. The secondary insulating layer 100 and the primary insulating layer 300 are formed by splicing together several of the above-mentioned anchoring structures, that is, by arranging and splicing multiple insulating boxes 10 to form a complete insulating layer structure. In this embodiment, each insulating box 10 is a square structure with equal length and width. The center position of the insulating box 10 is set as a fixed anchoring strip 110, which is fixedly connected to the insulating box 10 and cannot slide relative to the insulating box 10. The function of the fixed anchoring strip 110 is to provide fixed anchor points for the top corners of the corrugated plates 210 of the primary shielding layer 400 and the secondary shielding layer 200, firmly locking the corner positions of the corrugated plates 210 onto the insulating box 10, ensuring that the positioning reference of the corrugated plates 210 on the insulating layer does not shift. The sliding anchor strip 20 is arranged along the extension direction of the fixed anchor strip 110, that is, the sliding anchor strip 20 extends outward from the position of the fixed anchor strip 110 along the side length direction of the insulation box 10. The sliding anchor strip 20 is connected to the upper support plate 12 of the insulation box 10 through the aforementioned sliding connector 30, and can slide on the insulation box 10 along its own length direction, providing displacement compensation for the side length portion of the corrugated plate 210.

[0049] In this embodiment, the circumference of the corrugated plate 210 is connected to the fixed anchor strip 110 and the sliding anchor strip 20 by spot welding. When the corrugated plate 210 expands and contracts due to temperature changes, the top corner position remains fixed. The displacement of the side length is released by the sliding anchor strip 20 on the upper support plate 12, thus forming a constraint mode of fixed corner and sliding side, which effectively releases thermal stress while ensuring sealing reliability.

[0050] In this embodiment, the apex corner of the insulation box 10 of the main insulation layer 300 and the corrugated plate 210 of the secondary shielding layer 200 are connected by a point anchoring connector. The point anchoring connector is a partially fixed connection structure that connects the apex corner of the insulation box 10 of the main insulation layer 300 to the corrugated plate 210 of the secondary shielding layer 200, realizing the position transfer and constraint between the two enclosure structures, ensuring the stability of the relative positional relationship between the main insulation layer 300 and the corrugated plate 210 of the secondary shielding layer 200, and maintaining the structural coordination of the entire double-layer enclosure system.

[0051] The above-described embodiments are merely preferred embodiments provided to fully illustrate the present invention, and the scope of protection of the present invention is not limited thereto. Equivalent substitutions or modifications made by those skilled in the art based on the present invention are all within the scope of protection of the present invention. The scope of protection of the present invention is defined by the claims.

Claims

1. A membrane enclosure system, characterized in that, From the outside in, the layers consist of a secondary insulating layer, a secondary shielding layer, a primary insulating layer, and a primary shielding layer. The secondary insulating layer and the primary insulating layer are formed by splicing together several anchoring structures, which include: An insulation box, the insulation box including a heat insulation layer and an upper support plate and a lower support plate that are attached to the upper and lower sides of the heat insulation layer, the upper support plate being provided with a mounting groove; A sliding anchor strip is disposed in the mounting groove. The sliding anchor strip is connected to the upper support plate via a sliding connector. The sliding connector includes a limiting protrusion and a guide groove. The limiting protrusion is disposed in one of the sliding anchor strip and the upper support plate, and the guide groove is disposed in the other. The guide groove is aligned with the length direction of the sliding anchor strip. The limiting protrusion is embedded in the guide groove, causing the sliding anchor strip to displace relative to the upper support plate. The insulation box is a square structure with equal length and width. A fixed anchor bar is set at the center of the insulation box. The sliding anchor bar is set along the extension direction of the fixed anchor bar. The top corners of the corrugated plates of the secondary shielding layer and the primary shielding layer are connected to the fixed anchor bar. The side length of the corrugated plate is connected to the sliding anchor bar. The top corner of the insulation box corresponding to the primary insulation layer is connected to the secondary shielding layer through a point anchor connector. The limiting protrusion is a guide strip, which is fixed at the middle position of the bottom surface of the mounting groove. The guide groove is a sliding groove provided on the lower surface of the sliding anchor strip. The guide strip is embedded in the sliding groove. The guide strip is a strip-shaped component with an inverted trapezoidal cross section. The guide strip and the sliding groove are in sliding fit.

2. The simplified anchoring structure for a membrane enclosure system as described in claim 1, characterized in that, The surface of the upper support plate is provided with a lubricating layer.

3. The simplified anchoring structure for a membrane enclosure system as described in claim 2, characterized in that, The lubricating layer is a polytetrafluoroethylene film.

4. The simplified anchoring structure for a membrane enclosure system as described in claim 1, characterized in that, The mounting slots located on the same straight line are arranged in a continuous manner.

5. A simplified anchoring structure for a membrane enclosure system as described in claim 1, characterized in that, The insulation layer is a polyurethane layer, and both the upper and lower support plates are plywood.

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