PVDF membrane splicing structure in high-altitude, dry, hot valleys and windy areas

Abstract

This invention provides a PVDF membrane splicing structure for high-altitude, hot, dry valleys with strong winds, relating to the field of air-supported membrane architecture technology. It solves the problem of water leakage at the splicing joints in existing air-supported membrane structures. The invention includes a roof formed on top of a concrete foundation within an air-supported membrane structure, comprising a membrane body and connecting components. The connecting portion of the membrane body includes a first membrane material and a second membrane material overlapping the outer surface of the first membrane material. Multiple connecting components are sequentially spaced along the connecting portion, clamping the first and second membrane materials together. A heat-sealing portion is provided in the interval area between adjacent connecting components, fusing and bonding the first and second membrane materials. This heat-sealing portion at least partially fills the sealing gap in the interval area between adjacent connecting components, preventing rainwater from seeping laterally into the inner side of the membrane body from the overlap gap between the first and second membrane materials in the interval area, thereby solving the problem of water leakage at the splicing joints to a certain extent.

Description

Technical Field

[0001] This invention relates to the field of air-supported membrane architecture technology, specifically to a PVDF (polyvinylidene difluoride) membrane splicing structure for high-altitude, hot, dry valleys with strong winds. Background Technology

[0002] An air-supported membrane structure is a large-span spatial structure that utilizes indoor air pressure to support its roof. The membrane that forms the roof is usually assembled on-site from multiple membrane materials and fixed to a concrete foundation. The air filled into the membrane and the foundation provides support for the air-supported membrane structure, eliminating the need for internal beams and columns. The membrane material is often chosen to be polyvinylidene fluoride (PVDF) coated membrane material, which has excellent weather resistance.

[0003] Before splicing, the edges of the membrane material are heat-sealed at the factory to form rope edges, enhancing their mechanical properties. During on-site construction, the rope edges of adjacent membrane materials are overlapped, and special aluminum clamps and bolts are used to anchor them at certain intervals along the splice direction, forming a splice structure that combines load-bearing capacity and sealing. To enhance waterproofing and weather resistance, a cover membrane is usually placed on the outside of the splice structure as an additional protective layer.

[0004] When applied to high-altitude, hot, dry valleys with strong winds, air-supported membrane structures face unique environmental challenges. These areas experience strong and continuous winds, causing the membrane to fluctuate and vibrate repeatedly under wind loads. This continuous disturbance can lead to gaps at the joints, especially between adjacent panels, due to stress concentration and material deformation. This can result in seal failure and rainwater leakage.

[0005] Therefore, the long-term sealing reliability of the joint structure of air-supported membrane structures has become a key issue that needs to be considered and resolved in the design and construction of high-altitude, hot, dry valleys with strong winds. Summary of the Invention

[0006] The purpose of this invention is to design a PVDF membrane splicing structure for high-altitude, dry, hot river valleys with strong winds, in order to solve the problem of water leakage at the splicing joints between membrane materials in the roof of air-supported membrane structures.

[0007] This invention is achieved through the following technical solution:

[0008] A PVDF membrane splicing structure for high-altitude, hot, dry valleys with strong winds is formed on the roof of an air-supported membrane structure installed on a concrete foundation. This PVDF membrane splicing structure includes a membrane body and connecting components. The membrane body has at least one connecting portion formed by overlapping two membrane sheets. The connecting portion includes a first membrane sheet and a second membrane sheet overlapping the outer surface of the first membrane sheet. Multiple connecting components are sequentially spaced along the connecting portion, clamping the first and second membrane sheets together in the thickness direction of the membrane body. An interval region is formed between adjacent connecting components in the membrane body, and a heat-sealed portion is provided within the interval region, where the first and second membrane sheets are fused and bonded together in the thickness direction of the membrane body using a heat-sealing method.

[0009] When the above-described structure is adopted, the roof of the air-supported membrane structure installed on a concrete foundation is composed of multiple membrane materials spliced ​​together. The joints between the membrane materials are overlapped to form a continuous connection. In addition to the portion at the connection where the first and second membrane materials are clamped together in the thickness direction by connecting components, a heat-sealed portion is also formed in the interval area between adjacent connecting components, fusing and bonding the first and second membrane materials together. This heat-sealed portion can at least partially fill the sealing gap formed by the spaced arrangement of adjacent connecting components, preventing rainwater from seeping laterally into the inner side of the membrane structure from the overlap gap between the first and second membrane materials in the interval area. This, to a certain extent, solves the problem of water leakage at the joint between the first and second membrane materials in the roof of the air-supported membrane structure.

[0010] To further improve the implementation of the present invention, the following configuration structure is adopted: in the direction of the connecting portion, the heat-sealing portion extends from one edge of the two adjacent connecting components to the other edge.

[0011] To further improve the implementation of the present invention, the following structure is specifically adopted: the connecting assembly includes clamping plates, bolts, and nuts; the two clamping plates clamp the connecting portion inside and outside in the thickness direction of the membrane body; the bolt connects one of the two clamping plates, the connecting portion, and the other of the two clamping plates in series inside and outside; the nut screws the bolt to fasten the two clamping plates to press the first membrane material and the second membrane material.

[0012] To further improve the present invention, the following structure is adopted: on the direction of the connecting part, both ends of the clamping plate are formed with recessed notches along the direction of the connecting part, and both ends of the heat-sealed part extend into the inner side of the notches at the corresponding ends.

[0013] To further improve the present invention, the following structure is provided: the surface of the clamping plate used to clamp the connecting part is provided with a stepped groove, the stepped groove is recessed along the thickness direction of the clamping plate to form a stepped surface facing the connecting part, and the side of the stepped groove facing the connecting part is exposed inside the notch.

[0014] The heat-sealed portion has an extrusion ring that protrudes in the thickness direction of the film and is formed by heat pressing on its periphery, and the extrusion ring presses the stepped surface within the stepped groove.

[0015] To further improve the implementation of the present invention, the following structure is specifically adopted: the membrane material includes a base fabric layer, an inner PVC coating and an outer PVC coating respectively disposed on the inner and outer surfaces of the base fabric layer, and a PVDF coating disposed on the outer surface of the outer PVC coating.

[0016] To further improve the present invention, the following structure is specifically adopted: at the connecting portion, the first membrane material adopts an outward flange structure at its rope edge to form a first flange portion, and the second membrane material adopts an inward flange structure at its rope edge to form a second flange portion, the second flange portion overlapping the first flange portion; the connecting assembly presses the PVDF coating of the second flange portion onto the inner PVC coating of the first flange portion; at the heat-sealing portion, the PVDF coating of the second flange portion is configured as a modified PVDF layer fused and bonded to the inner PVC coating of the first flange portion;

[0017] Alternatively, at the connecting portion, the first membrane material adopts an inwardly turned-up structure at its rope edge to form a first turned-up portion, and the second membrane material adopts an inwardly turned-up structure at its rope edge to form a second turned-up portion, wherein the PVDF coating of the second turned-up portion overlaps the PVDF coating on the outer surface of the first membrane material; the connecting assembly presses the PVDF coating of the second turned-up portion tightly against the PVDF coating of the first membrane material;

[0018] Alternatively, at the connecting portion, the first membrane material adopts an outward flange structure at its rope edge to form a first flange portion, and the second membrane material adopts an outward flange structure at its rope edge to form a second flange portion, wherein the inner PVC coating on the inner surface of the second membrane material overlaps the inner PVC coating of the first flange portion; the connecting assembly presses the inner PVC coating of the second membrane material against the inner PVC coating of the first flange portion.

[0019] To further improve the implementation of the present invention, the following configuration is adopted: the heat-sealed portion occupies all or part of the spacer area.

[0020] To further improve the present invention, the following structure is specifically adopted: at the connecting portion, the first membrane material adopts an outward flange structure at its rope edge to form a first flange portion, and the second membrane material adopts an inward flange structure at its rope edge to form a second flange portion. The second flange portion overlaps the PVDF coating of the first membrane material, and the inner PVC coating of the second membrane material overlaps the inner PVC coating of the first flange portion.

[0021] To further improve the present invention, the following structure is specifically adopted: the heat-sealing part is disposed in the area where the inner PVC coating of the second film material overlaps with the inner PVC coating of the first flange part.

[0022] The present invention has the following advantages and beneficial effects:

[0023] In this invention, the roof of the air-supported membrane structure installed on a concrete foundation is composed of multiple membrane materials spliced ​​together, with the joints between the membrane materials overlapping to form a continuous connection. At the connection point, in addition to a section where connecting components clamp the first and second membrane materials in the thickness direction, a heat-sealed section is formed in the gap between adjacent connecting components, fusing and bonding the first and second membrane materials together. This heat-sealed section at least partially fills the sealing gap formed by the spaced arrangement of adjacent connecting components, preventing rainwater from seeping laterally into the inner part of the membrane from the overlap between the first and second membrane materials in the gap, thus partially solving the problem of water leakage at the joint between the first and second membrane materials in air-supported membrane structures. In this invention, the heat-sealed section formed in the gap between adjacent connecting components provides a sealing function without significantly affecting the deformation capacity of the connection section in the gap area, effectively maintaining the normal shape of the roof. Attached Figure Description

[0024] To more clearly illustrate the technical solutions in the embodiments of the present invention or the prior art, the drawings used in the description of the embodiments or the prior art will be briefly introduced below. Obviously, the drawings described below are only some embodiments of the present invention. For those skilled in the art, other drawings can be obtained based on these drawings without creative effort.

[0025] Figure 1 The longitudinal section of the membrane connection between two adjacent connection components is shown;

[0026] Figure 2 It shows Figure 1 The structure shown is the structure before the heat-sealed part is formed;

[0027] Figure 3yes Figure 1 A magnified schematic diagram of part A in the middle;

[0028] Figure 4 The diagram shows a first cross-sectional structure of the membrane connection at the connection assembly, with the area circled by the dashed box in the figure representing the range of the connection.

[0029] Figure 5 The diagram shows a second cross-sectional structure of the membrane connection at the connection assembly, with the area circled by the dashed box in the figure representing the range of the connection.

[0030] Figure 6 The diagram shows a third cross-sectional structure of the membrane connection at the connection assembly. The area circled by the dashed box in the figure represents the range of the connection.

[0031] Figure 7 The fourth cross-sectional structure of the membrane connection at the connection assembly is shown. The area circled by the dashed box in the figure represents the range of the connection.

[0032] Figure 8 The diagram shows a first top view of the connection between two adjacent connecting components of the membrane body. The dashed lines in the figure represent the outline of the stepped groove that is obscured, and the filled parts represent the heat-sealed parts.

[0033] Figure 9 The diagram shows a second top view of the connection between two adjacent connecting components of the membrane body. The dashed lines in the figure represent the outline of the stepped groove that is obscured, and the filled parts represent the heat-sealed parts.

[0034] Figure 10 This is a schematic diagram of the layered structure of PVDF membrane material.

[0035] The diagram is marked as follows:

[0036] 10. Membrane body; 11. Connecting part; 101. Base fabric layer; 102. Inner PVC coating; 103. Outer PVC coating; 104. PVDF coating;

[0037] 111, First membrane material; 1111, First flanged portion;

[0038] 112. Second membrane material; 1121. Second flanged section;

[0039] 113. Heat-sealed section; 1131. Extrusion ring; 1132. Hot press groove;

[0040] 20. Connecting assembly; 21. Clamping plate; 211. Notch; 212. Step groove; 213. Step surface; 22. Bolt; 23. Nut;

[0041] 30. Interval area. Detailed Implementation

[0042] To make the objectives, technical solutions, and advantages of this invention clearer, the technical solutions of this invention will be described in detail below. Obviously, the described embodiments are merely some embodiments of this invention, and not all embodiments. Based on the embodiments of this invention, all other implementation methods obtained by those skilled in the art without creative effort are within the scope of protection of this invention.

[0043] In the description of this application, it should be noted that, unless otherwise stated, "a plurality of" means two or more; the terms "upper," "lower," "left," "right," "inner," "outer," etc., indicate the orientation or positional relationship based on the orientation or positional relationship shown in the accompanying drawings, and are only for the convenience of describing the present invention and simplifying the description, and do not indicate or imply that the device or element referred to must have a specific orientation, or be constructed and operated in a specific orientation, and therefore should not be construed as a limitation of the present invention.

[0044] The terms "first," "second," etc., used in the specification and claims of this application are used to distinguish similar objects and not to describe a specific order or sequence. It should be understood that such use of data can be interchanged where appropriate so that embodiments of this application can be implemented in orders other than those illustrated or described herein, and the objects distinguished by "first," "second," etc., are generally of the same class and the number of objects is not limited; for example, a first object can be one or more. Furthermore, in the specification and claims, "and / or" indicates at least one of the connected objects, and the character " / " generally indicates that the preceding and following objects are in an "or" relationship.

[0045] In the description of this application, it should also be noted that, unless otherwise explicitly specified and limited, the terms "installation," "connection," and "joining" should be interpreted broadly. For example, they can refer to fixed connections, detachable connections, or integral connections; they can refer to mechanical connections or electrical connections; they can refer to direct connections or indirect connections through an intermediate medium. Those skilled in the art can understand the specific meaning of the above terms in this invention according to the specific circumstances.

[0046] On the one hand, this application discloses a PVDF membrane splicing structure for high-altitude, hot, dry valleys with strong winds, such as... Figure 1 - Figure 9 As shown, this PVDF (polyvinylidene fluoride) membrane splicing structure is used for installation on the roof of an air-supported membrane structure on a concrete foundation, and is specifically designed as follows:

[0047] The PVDF membrane splicing structure in this high-altitude, hot, dry valley with strong winds is formed on the roof. It includes a membrane body 10 made of multiple membrane sheets spliced ​​together and a connecting assembly 20 for fastening and sealing the joints of the membrane body 10. The edges of the membrane are turned up at the rope edges and then heat-sealed to form a heat-pressed edge and a rope sleeve. An edge rope is threaded inside the rope sleeve.

[0048] The membrane body 10 has at least one connecting portion 11 formed by overlapping two membrane materials. When the membrane body 10 is spliced ​​from two membrane materials, the membrane body 10 has one connecting portion 11; when the membrane body 10 is spliced ​​from three membrane materials sequentially in one direction, the membrane body 10 has two connecting portions 11, and so on.

[0049] like Figure 1 - Figure 7 As shown, the membrane body 10 includes two membrane materials at the connecting portion 11: a first membrane material 111 and a second membrane material 112. The hot-pressed edge of the second membrane material 112 overlaps the hot-pressed edge of the first membrane material 111, such that the second membrane material 112 is entirely overlapped with the outer surface of the hot-pressed edge of the first membrane material 111 through the inner surface of its hot-pressed edge.

[0050] The membrane material is PVDF, which has high weather resistance, corrosion resistance, good self-cleaning properties, and anti-aging properties, meeting the Class B fire resistance requirements of GB8624-2012 "Classification of Burning Performance of Building Materials and Products". Figure 10 As shown, the membrane material includes a base fabric layer 101, a coating layer, and a surface layer. The base fabric layer is made of polyester fiber (PET) fabric with good wicking properties. The coating layer is made of polyvinyl chloride (PVC), and the surface layer is made of polyvinylidene fluoride (PVDF). The inner and outer surfaces of the base fabric layer 101 are provided with an inner PVC coating 102 and an outer PVC coating 103, respectively. The outer surface of the outer PVC coating 103 is provided with a PVDF coating 104.

[0051] The connecting component 20 has multiple components, such as Figure 1 - Figure 3 as well as Figure 8 and Figure 9 As shown, multiple connecting components 20 are sequentially spaced along the direction of the connecting portion 11. Generally, the larger the span of the ceiling and the longer the connecting portion 11, the more connecting components 20 are required. The connecting components 20 are installed onto the first membrane material 111 and the second membrane material 112 simultaneously with the worker overlapping the second membrane material 112 onto the outer surface of the first membrane material 111, clamping the first membrane material 111 and the second membrane material 112 in the thickness direction of the membrane body 10 to form a stable connection and a reliable seal.

[0052] like Figure 1 - Figure 3 as well as Figure 8 and Figure 9As shown, since the connecting components 20 are arranged sequentially at intervals along the direction of the connecting portion 11, the membrane body 10 forms a gap region 30 between two adjacent connecting components 20. A heat-sealing portion 113 is provided in the gap region 30 to fill the area that is not directly clamped by the connecting components 20.

[0053] The heat-sealing part 113 uses a heat-sealing method to fuse and bond the first membrane material 111 and the second membrane material 112 along the thickness direction of the membrane body 10 to form a reliable interlayer seal. Generally, after the two adjacent connecting components 20 are installed, the heat-sealing part 113 heats the first membrane material 111 and the second membrane material 112 by means of a hot air gun, a hot press, or a hot press plate, and after reaching the temperature that melts the interlayer coating of the first membrane material 111 and the second membrane material 112, an appropriate bonding pressure is applied to the first membrane material 111 and the second membrane material 112 to finally fuse and bond them together.

[0054] The connecting assembly 20 includes two aluminum alloy clamps 21, two bolts 22, and two nuts 23. For example... Figure 1 , Figure 2 and Figure 4 As shown, the two clamping plates 21 of the connecting assembly 20 are respectively attached to the inner surface of the first membrane material 111 and the outer surface of the second membrane material 112 in the thickness direction of the membrane body 10, so as to clamp the connecting part 11 from the inside and outside. Two through holes are pre-machined on the clamping plate 21, and multiple through holes are pre-machined along the edge direction of the hot pressing edge of the membrane material. The bolt 22 passes through the clamping plate 21 and the corresponding through holes on the membrane material from the inside to the outside, and sequentially connects the inner clamping plate 21, the two membrane materials of the connecting part 11, and the outer clamping plate 21. The nut 23 screws the bolt 22 to fasten the two clamping plates 21 to press the first membrane material 111 and the second membrane material 112.

[0055] In this embodiment, the roof of the air-supported membrane structure installed on a concrete foundation is composed of multiple membrane materials spliced ​​together to form a membrane body 10. A seam structure is formed at the joints between the membrane materials. In this high-altitude, hot, dry valley windy area PVDF membrane material seam structure, the joints between the membrane materials are formed by overlapping to create a continuous connecting portion 11. In addition to the portion at the connecting portion 11 where the first membrane material 111 and the second membrane material 112 are clamped together in the thickness direction of the membrane body 10 by connecting components 20, a heat-sealed portion 113 is also formed in the interval area 30 between adjacent connecting components 20, which fuses and adheres the first membrane material 111 and the second membrane material 112 together. The heat-sealed part 113 can at least partially fill the sealing gap of the interval area 30 formed by the spaced arrangement of two adjacent connecting components 20, preventing rainwater from seeping laterally into the inner side of the membrane body 10 from the overlap gap between the first membrane material 111 and the second membrane material 112 in the interval area 30. In particular, when the air-supported membrane building with the PVDF membrane material splicing structure of the high-altitude dry and hot valley wind zone is applied to the high-altitude dry and hot valley wind zone, the interlayer fusion part of the first membrane material 111 and the second membrane material 112 in the interval area 30 can resist the continuous disturbance of the strong wind well, and is not easy to peel off due to stress concentration and material deformation, thus causing gaps. This solves the problem of water leakage at the splice of the first membrane material 111 and the second membrane material 112 in the roof of the air-supported membrane building to a certain extent, and can achieve long-term reliable sealing.

[0056] The heat-sealed part 113 formed by heat sealing in the gap area 30 between two adjacent connecting components 20 of the PVDF membrane splicing structure in the high-altitude dry and hot valley windy area not only plays a sealing role, but also does not significantly affect the deformation capacity of the connecting part 11 in the gap area 30, and can maintain the normal shape of the roof well.

[0057] According to some optional embodiments, such as Figure 3 , Figure 8 and Figure 9 As shown, the heat-sealed portion 113 within the partition region 30 extends along the direction of the connecting portion 11 from one edge of the two adjacent connecting components 20 to the other edge, such that the sealing portion of the heat-sealed portion 113 can reach the end position of the clamping plate 21 of the two adjacent connecting components 20, so as to completely seal the partition region 30 longitudinally, that is, along the direction of the connecting portion 11. The lateral width of the heat-sealed portion 113, that is, the distance in the direction perpendicular to the direction of the connecting portion 11, is preferably 25 mm or more, until it fills the entire partition region 30.

[0058] According to some optional embodiments, such as Figure 1 - Figure 3 , Figure 8 and Figure 9As shown, the clamping plates 21 of the connecting assembly 20 have recessed notches 211 at both ends along their length, forming a U-shaped structure at both ends. The connecting assembly 20 is installed onto the connecting portion 11 with the notches 211 of the clamping plates 21 facing the connecting portion 11. Along the direction of the connecting portion 11, the notches 211 of adjacent clamping plates 21 face each other, and the longitudinal ends of the heat-sealed portion 113 extend into the inner side of the notches 211 at the corresponding ends.

[0059] In some embodiments, the longitudinal ends of the heat-sealed portion 113 are as follows: Figure 8 and Figure 9 The extension extends to the end of the corresponding clamp 21. In other embodiments, the longitudinal ends of the heat-sealed portion 113 have a certain gap from the end of the corresponding clamp 21.

[0060] According to some optional embodiments, such as Figure 2 , Figure 3 and Figure 9 As shown, the surface of the clamping plate 21 used to clamp the connecting part 11 is provided with a stepped groove 212 that is recessed in the thickness direction of the clamping plate 21. The side of the stepped groove 212 facing the connecting part 11 is exposed inside the notch 211 and is composed of two surfaces, including a stepped surface 213 facing the connecting part 11 along the clamping plate 21 and a vertical surface perpendicular to the stepped surface 213.

[0061] After the heat-sealed portion 113 is hot-pressed, a hot-press groove 1132, which is thinner than other areas of the connecting portion 11, is formed at the pressing site. The pressing action not only fuses the first film material 111 and the second film material 112 of the heat-sealed portion 113, but also pushes some of the molten material outward of the hot-press groove 1132, thereby forming an extrusion ring 1131 protruding in the thickness direction of the film body 10 at the periphery of the heat-sealed portion 113. The extrusion ring 1131 presses the stepped surface 213 in the stepped groove 212 or simultaneously presses the vertical surface.

[0062] During the actual processing of the heat-sealed part 113, due to the fact that the hot pressing tool cannot perfectly fit the gap area 30 between the two adjacent clamping plates 21, and the uncertainty of the quality of manual hot pressing, the heat-sealed part 113 may not be able to completely seal the ends of the clamping plates 21 of the two adjacent connecting components 20. This may result in a gap between the end of the heat-sealed part 113 and the end of the clamping plate 21. After the extrusion ring 1131 is matched with the stepped groove 212, the stepped groove 212 can accommodate the extrusion ring 1131 and limit the extrusion range of the extrusion ring 1131 to a certain extent. It can apply extrusion pressure to the extrusion ring 1131 to enhance the interlayer extrusion force between the first film material 111 and the second film material 112, thereby allowing the first film material 111 and the second film material 112 to have a certain extrusion sealing effect at the end of the clamping plate 21 to compensate for the lack of sealing between the end of the heat-sealed part 113 and the end of the clamping plate 21.

[0063] According to some optional embodiments, such as Figure 4 As shown, in the PVDF membrane splicing structure of this high-altitude, hot, dry valley with strong winds, the first membrane 111 at the connecting part 11 adopts an outward flange structure at its rope edge to form a first flange 1111, while the second membrane 112 adopts an inward flange structure at its rope edge to form a second flange 1121. The second flange 1121 overlaps the first flange 1111. The connecting assembly 20 presses the PVDF coating 104 of the second flange 1121 against the inner PVC coating 102 of the first flange 1111. At the heat-sealing part 113, the PVDF coating 104 of the second flange 1121 is configured as a modified PVDF layer that is fused and bonded to the inner PVC coating 102 of the first flange 1111.

[0064] In this embodiment, at the connecting part 11, the two clamping plates 21 of the connecting assembly 20 clamp a total of four layers of membrane material, including two layers of the first flange portion 1111 of the first membrane material 111 and two layers of the second flange portion 1121 of the second membrane material 112.

[0065] Of course, in some embodiments, the PVDF coating 104 of the second flange 1121 can also be scraped or sanded beforehand to expose the outer PVC coating 103. In this way, during heat sealing, the heat-sealing surface between the second film material 112 and the first film material 111 will be the fusion and bonding of the outer PVC coating 103 and the inner PVC coating 102. When the PVC coatings are directly heat-sealed, they have good fluidity and mutual interlocking ability, which can help with the heat sealing quality and the formation of the extrusion ring 1131.

[0066] In this embodiment, as Figure 8 As shown, the heat-sealed part 113 occupies the entire area of ​​the interval region 30, but it can also be as follows: Figure 9 As shown, it occupies a portion of the interval area 30.

[0067] According to some optional embodiments, such as Figure 5 As shown, in the high-altitude, hot, dry valley windy area, the PVDF membrane splicing structure at the connecting part 11 has an inwardly folded edge structure at its rope edge to form a first folded edge 1111, and the second membrane 112 has an inwardly folded edge structure at its rope edge to form a second folded edge 1121. The PVDF coating 104 of the second folded edge 1121 overlaps the PVDF coating 104 on the outer surface of the first membrane 111. The connecting assembly 20 presses the PVDF coating 104 of the second folded edge 1121 tightly against the PVDF coating 104 of the first membrane 111. The PVDF coating 104 of the first folded edge 1111 and the PVDF coating 104 of the second folded edge 1121 can be made of modified PVDF material so that their melting temperature overlaps with the melting temperature of PVC.

[0068] In this embodiment, at the connecting part 11, the two clamping plates 21 of the connecting assembly 20 clamp a total of four layers of membrane material, including two layers of the first flange portion 1111 of the first membrane material 111 and two layers of the second flange portion 1121 of the second membrane material 112.

[0069] Of course, in some embodiments, the PVDF coating 104 of the first flange 1111 and the PVDF coating 104 of the second flange 1121 can be scraped off beforehand to expose the outer PVC coating 103 of their respective membrane materials. In this way, during heat sealing, the heat-sealing surfaces of the first membrane material 111 and the second membrane material 112 will be the outer PVC coating 103 and the inner PVC coating 102 fused and bonded together.

[0070] In this embodiment, as Figure 8 As shown, the heat-sealed part 113 occupies the entire area of ​​the interval region 30, but it can also be as follows: Figure 9 As shown, it occupies a portion of the interval area 30.

[0071] According to some optional embodiments, such as Figure 6 As shown, in the PVDF membrane splicing structure of this high-altitude, hot, dry valley with strong winds, the first membrane 111 at the connecting part 11 adopts an outward-folded structure at its rope edge to form a first folded edge 1111, and the second membrane 112 adopts an outward-folded structure at its rope edge to form a second folded edge 1121. The inner PVC coating 102 of the inner surface of the second membrane 112 overlaps the inner PVC coating 102 of the first folded edge 1111. The connecting assembly 20 presses the inner PVC coating 102 of the second membrane 112 tightly against the inner PVC coating 102 of the first folded edge 1111.

[0072] In this embodiment, at the connecting part 11, the two clamping plates 21 of the connecting assembly 20 clamp a total of four layers of membrane material, including two layers of the first flange portion 1111 of the first membrane material 111 and two layers of the second flange portion 1121 of the second membrane material 112.

[0073] In this embodiment, as Figure 8 As shown, the heat-sealed part 113 occupies the entire area of ​​the interval region 30, but it can also be as follows: Figure 9 As shown, it occupies a portion of the interval area 30.

[0074] According to some optional embodiments, such as Figure 7As shown, in the PVDF membrane splicing structure of the high-altitude, hot, dry valley with strong winds, the first membrane 111 at the connection 11 adopts an outward flange structure at its rope edge to form a first flange 1111, and the second membrane 112 adopts an inward flange structure at its rope edge to form a second flange 1121. The second flange 1121 overlaps the PVDF coating 104 of the first membrane 111, and the inner PVC coating 102 of the second membrane 112 overlaps the inner PVC coating 102 of the first flange 1111. Thus, at the connection 11, the two clamping plates 21 of the connecting assembly 20 clamp a total of three layers of membrane material, including two regions. One region includes two layers of the first flange 1111 of the first membrane 111 and one layer of the second membrane 112, and the other region includes one layer of the first membrane 111 and two layers of the second flange 1121.

[0075] In this embodiment, as Figure 9 As shown, the heat-sealed portion 113 occupies a portion of the interval area 30. Specifically, the heat-sealed portion 113 is disposed in the area where the inner PVC coating 102 of the second membrane material 112 overlaps with the inner PVC coating 102 of the first flange portion 1111.

[0076] On the other hand, this application discloses a PVDF air-supported membrane structure for high-altitude dry and hot valley windy areas. The roof of the air-supported membrane structure adopts the PVDF membrane splicing structure for high-altitude dry and hot valley windy areas in any of the above embodiments at the splicing structure between the membrane materials.

[0077] It should be noted that, in this document, the terms "comprising," "including," or any other variations thereof are intended to cover non-exclusive inclusion, such that a process, method, article, or apparatus that comprises a list of elements includes not only those elements but also other elements not expressly listed, or elements inherent to such a process, method, article, or apparatus. Unless otherwise specified, an element defined by the phrase "comprising one..." does not exclude the presence of other identical elements in the process, method, article, or apparatus that includes that element.

[0078] Furthermore, it should be noted that the scope of the methods and apparatus in the embodiments of this application is not limited to performing functions in the order shown or discussed, but may also include performing functions substantially simultaneously or in the reverse order, depending on the functions involved. For example, the described methods may be performed in a different order than described, and various steps may be added, omitted, or combined. In addition, features described with reference to certain examples may be combined in other examples.

[0079] The above description is merely a specific embodiment of the present invention, but the scope of protection of the present invention is not limited thereto. Any changes or substitutions that can be easily conceived by those skilled in the art within the scope of the technology disclosed in the present invention should be included within the scope of protection of the present invention.

Claims

1. A PVDF membrane splicing structure in a high-altitude, dry, hot, windy valley, formed by the installation of a roof on top of a concrete foundation in an air-supported membrane structure, characterized by: The device includes a membrane body (10) and connecting components (20); the membrane body (10) has at least one connecting portion (11) formed by overlapping two membrane materials, the connecting portion (11) includes a first membrane material (111) and a second membrane material (112) overlapping the outer surface of the first membrane material (111); multiple connecting components (20) are arranged sequentially at intervals along the direction of the connecting portion (11), and clamp the first membrane material (111) and the second membrane material (112) in the thickness direction of the membrane body (10); the membrane body (10) forms a gap region (30) between two adjacent connecting components (20), and a heat-sealed portion (113) is provided in the gap region (30) to fuse and bond the first membrane material (111) and the second membrane material (112) in the thickness direction of the membrane body (10) by heat sealing.

2. The PVDF membrane splicing structure in the high-altitude, hot, dry valley windy zone according to claim 1, characterized in that: In the orientation of the connecting portion (11), the heat-sealed portion (113) extends from one edge of the two adjacent connecting components (20) to the other edge.

3. The PVDF membrane splicing structure in the high-altitude, hot, dry valley windy zone according to claim 1, characterized in that: The connecting assembly (20) includes a clamping plate (21), a bolt (22), and a nut (23); the two clamping plates (21) clamp the connecting part (11) inside and outside in the thickness direction of the membrane body (10); the bolt (22) is connected in series inside and outside to one of the two clamping plates (21), the connecting part (11), and the other of the two clamping plates (21); the nut (23) screws the bolt (22) to fasten the two clamping plates (21) to press the first membrane material (111) and the second membrane material (112).

4. The PVDF membrane splicing structure in the high-altitude, hot, dry valley windy zone according to claim 3, characterized in that: Along the direction of the connecting part (11), both ends of the clamp (21) are formed with recessed notches (211) along the direction of the connecting part (11), and both ends of the heat-sealed part (113) extend into the inner side of the notches (211) at the corresponding ends.

5. The PVDF membrane splicing structure in high-altitude, hot, dry valleys with strong winds, as described in claim 4, is characterized in that: The clamping plate (21) for clamping the connecting part (11) has a stepped groove (212) on its surface. The stepped groove (212) is recessed along the thickness direction of the clamping plate (21) to form a stepped surface (213) facing the connecting part (11), and the side of the stepped groove (212) facing the connecting part (11) is exposed inside the notch (211). The heat-sealed part (113) has an extrusion ring (1131) formed by heat pressing on its periphery and protruding in the thickness direction of the film (10), the extrusion ring (1131) pressing the step surface (213) in the step groove (212).

6. The PVDF membrane splicing structure for high-altitude, hot, dry valleys and windy areas according to any one of claims 1-5, characterized in that: The membrane material includes a base fabric layer (101), an inner PVC coating (102) and an outer PVC coating (103) respectively disposed on the inner and outer surfaces of the base fabric layer (101), and a PVDF coating (104) disposed on the outer surface of the outer PVC coating (103).

7. The PVDF membrane splicing structure in high-altitude, hot, dry valleys with strong winds, as described in claim 6, is characterized in that: At the connecting portion (11), the first membrane material (111) adopts an outward flange structure at its rope edge to form a first flange portion (1111), and the second membrane material (112) adopts an inward flange structure at its rope edge to form a second flange portion (1121), the second flange portion (1121) overlapping the first flange portion (1111); the connecting assembly (20) presses the PVDF coating (104) of the second flange portion (1121) against the inner PVC coating (102) of the first flange portion (1111). At the heat-sealed portion (113), the PVDF coating (104) of the second flange portion (1121) is configured as a modified PVDF layer that is fused and bonded to the inner PVC coating (102) of the first flange portion (1111); Alternatively, at the connecting portion (11), the first membrane material (111) adopts an inward flange structure at its rope edge to form a first flange portion (1111), and the second membrane material (112) adopts an inward flange structure at its rope edge to form a second flange portion (1121), wherein the PVDF coating (104) of the second flange portion (1121) overlaps the PVDF coating (104) on the outer surface of the first membrane material (111); the connecting assembly (20) presses the PVDF coating (104) of the second flange portion (1121) against the PVDF coating (104) of the first membrane material (111). Alternatively, at the connecting portion (11), the first membrane material (111) adopts an outward flange structure at its rope edge to form a first flange portion (1111), and the second membrane material (112) adopts an outward flange structure at its rope edge to form a second flange portion (1121), the inner PVC coating (102) on the inner surface of the second membrane material (112) overlaps the inner PVC coating (102) of the first flange portion (1111); the connecting assembly (20) presses the inner PVC coating (102) of the second membrane material (112) against the inner PVC coating (102) of the first flange portion (1111).

8. The PVDF membrane splicing structure in high-altitude, hot, dry valleys with strong winds, as described in claim 7, is characterized in that: The heat-sealed portion (113) occupies all or part of the spacer region (30).

9. The PVDF membrane splicing structure in high-altitude, hot, dry valleys with strong winds, as described in claim 6, is characterized in that: At the connecting portion (11), the first membrane material (111) adopts an outward flange structure at its rope edge to form a first flange portion (1111), and the second membrane material (112) adopts an inward flange structure at its rope edge to form a second flange portion (1121). The second flange portion (1121) overlaps the PVDF coating (104) of the first membrane material (111), and the inner PVC coating (102) of the second membrane material (112) overlaps the inner PVC coating (102) of the first flange portion (1111).

10. The PVDF membrane splicing structure in the high-altitude, hot, dry valley windy zone according to claim 9, characterized in that: The heat-sealed portion (113) is disposed in the area where the inner PVC coating (102) of the second membrane material (112) overlaps with the inner PVC coating (102) of the first flange portion (1111).

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