Drainage device and shielding system

Abstract

The invention relates to the technical field of membrane structures, and discloses a drainage device and a shielding system.The drainage device is used for being fixedly connected between a supporting structure and a membrane structure and comprises a drainage structure fixed to the supporting structure and provided with a containing cavity, and the end, away from the supporting structure, of the drainage structure is fixedly connected with the membrane structure; the drainage part is arranged in the containing cavity, a drainage channel is formed in the drainage part, and the bottom end of the drainage part is obliquely arranged and used for draining water in the drainage channel. The drainage piece is arranged, and the bottom end of the drainage piece is obliquely arranged to form the drainage slope, so that water in the drainage channel can be completely drained, and the membrane structure can be set to be a plane structure, so that the use of supporting components is reduced, the construction cost and the construction difficulty are reduced, the stress is more uniform, and the structural stability is better; the self-weight of the structure can be reduced, so that the service life and the bearing capacity of the structure are improved; sediment is prevented from depositing in the drainage channel, and the later maintenance cost can be reduced.

Description

Technical Field

[0001] The invention relates to the technical field of membrane structures, and in particular to a drainage device and a shielding system. Background Art

[0002] Membrane structure is a type of structure that uses high-strength flexible thin film materials to generate pre-tension stress inside through auxiliary structures to form a certain spatial shape, and is covered on the structure or the main body of the building to resist external loads. Specifically, purlins are fixed above the roof trusses through purlin brackets, and the membrane structure is fixedly connected to the purlins. Membrane structure has the characteristics of high light transmittance, strong weather resistance, light weight and beautiful appearance. It is widely used in the roof systems of large public facilities such as stadiums, airport halls, exhibition centers, platforms, and landscape pavilions.

[0003] The traditional approach to membrane structures is to design them as arch structures, which rely on their own slope to drain water during rainfall. However, the use of arch structures requires the use of more supporting structures, which increases construction costs; in order to ensure that the membrane structure is evenly stressed and to ensure the stability of the structure, construction becomes more difficult.

[0004] However, designing the membrane structure as a flat structure can avoid these problems, and installing a gutter above the purlin for drainage. However, since the gutter has no slope or there is a dead angle between two adjacent gutterings, rainwater is easily accumulated in the gutter and cannot be completely drained away, thereby increasing the deadweight of the roof structure and reducing the service life and bearing capacity of the roof structure. Summary of the invention

[0005] In view of this, the present invention provides a drainage device and a shielding system to solve the problem that rainwater easily accumulates in the drainage trough and cannot be completely drained away, thereby increasing the deadweight of the roof structure and reducing the service life and bearing capacity of the roof structure.

[0006] In a first aspect, the present invention provides a drainage device for fixedly connecting between a supporting structure and a membrane structure, comprising:

[0007] A drainage structure is fixed on the supporting structure, the drainage structure has a receiving cavity, and one end of the drainage structure away from the supporting structure is fixedly connected to the membrane structure;

[0008] A drainage member is arranged in the accommodating cavity, a drainage channel is arranged in the drainage member, and the bottom end of the drainage member is inclined to drain the water in the drainage channel.

[0009] Beneficial effects: By setting up a drainage piece and tilting the bottom end of the drainage piece to form a drainage slope, the water in the drainage channel can be drained out, and the membrane structure can be set as a plane structure to reduce the use of supporting components, reduce construction costs and construction difficulties, and make the force more uniform and the structural stability better; at the same time, it can reduce the dead weight of the structure, thereby increasing the service life and bearing capacity of the structure; avoiding the risk of water leakage caused by the deposition of silt in the drainage channel can reduce the subsequent maintenance costs.

[0010] In an optional embodiment, at least two fixed positions are spaced apart on the inner wall of the drainage structure along the extension length direction of the drainage structure, and along the extension height direction of the drainage structure, the distances between at least two of the fixed positions and the bottom end of the drainage structure are different, and the drainage member is fixedly connected to the drainage structure via the fixed positions.

[0011] Beneficial effect: By setting different distances between at least two fixing positions and the bottom end of the drainage structure, an inclination angle can be formed between the bottom end of the drainage member and the bottom end of the drainage structure, thereby facilitating drainage.

[0012] In an optional embodiment, the fixing position is a groove;

[0013] And / or, a plurality of the fixing positions are spaced apart along the extending height direction of the drainage structure.

[0014] Beneficial effect: By arranging multiple fixed positions at intervals along the extension height direction of the drainage structure, the inclination angle between the bottom end of the drainage member and the bottom end of the drainage structure can be adjusted, so that the drainage channels between the multiple drainage structures can be gradually inclined without any drainage dead corners.

[0015] In an optional embodiment, the guiding member is a flexible member.

[0016] Beneficial effect: By using a flexible member as the drainage member, the inclination angle of the drainage member can be easily adjusted, and the weight of the flexible member is relatively light, which can reduce the deadweight of the structure.

[0017] In an optional embodiment, the drainage device includes:

[0018] A fixing component, both ends of which extend into the two oppositely arranged grooves respectively, for fixing the guide member.

[0019] Beneficial effect: By using a fixing component to fix the drainage piece in the groove, the position of the drainage piece can be adjusted according to the inclination angle, and the fixing method is simple and the fixing is firm.

[0020] In an optional embodiment, the fixing assembly includes:

[0021] a first fixing member;

[0022] The second fixing member is telescopically connected to the first fixing member and is used to adjust the length of the fixing assembly.

[0023] Beneficial effect: By setting the fixing component as a retractable structure, it is convenient to adjust the length of the fixing component so that the two ends of the fixing component can be respectively extended into two oppositely arranged grooves.

[0024] In an optional embodiment, the drainage device includes:

[0025] A connecting piece is fixedly connected to one end of the drainage structure away from the supporting structure, and is used for fixedly connecting the membrane structure.

[0026] Beneficial effect: By setting the connecting piece, the connection with the membrane structure is tighter, and the end of the membrane structure can be guided to the top of the drainage channel, avoiding water from flowing into the gap between the drainage piece and the drainage structure and being unable to be drained away.

[0027] In an optional embodiment, one end of the flow guide member away from the supporting structure is fixedly connected to the connecting member;

[0028] And / or, at least two connecting members are provided, and a reinforcing member is provided between two connecting members arranged opposite to each other;

[0029] And / or, the connecting member is arranged to be inclined so as to match the inclination angle of the membrane structure.

[0030] Beneficial effects: By fixedly connecting the drainage piece to the connecting piece, water can be prevented from flowing in through the gap between the drainage piece and the drainage structure and being unable to be drained away; by providing a reinforcing piece, the strength of the connecting piece can be increased to prevent cracking between the connecting piece and the drainage structure; by arranging the connecting piece at an angle, it can be adapted to the end shape of the membrane structure, thereby preventing the end of the drainage structure from scratching the membrane structure, or from being worn and shortening the service life.

[0031] In a second aspect, the present invention further provides a shielding system, comprising:

[0032] Support structure;

[0033] A membrane structure is spaced apart from the support structure;

[0034] The drainage device is fixedly connected between the supporting structure and the membrane structure.

[0035] Beneficial effect: Because the shielding system includes a drainage device, it has the same effect as the drainage device and will not be described in detail here.

[0036] In an optional embodiment, the drainage device is provided in plurality, and the distance between the bottom end of the flow guide member of each drainage device and the bottom end of the drainage structure is different;

[0037] And / or, a flexible member is provided at one end of the drainage structure away from the supporting structure, and the flexible member is used to support the membrane structure.

[0038] Beneficial effects: By setting the bottom end of the drainage piece of each drainage device at a different distance from the bottom end of the drainage structure, multiple drainage channels can be gradually inclined, thereby avoiding drainage dead corners; by setting flexible parts, the membrane structure can be prevented from being scratched, thereby causing danger. BRIEF DESCRIPTION OF THE DRAWINGS

[0039] In order to more clearly illustrate the specific implementation methods of the present invention or the technical solutions in the prior art, the drawings required for use in the specific implementation methods or the description of the prior art will be briefly introduced below. Obviously, the drawings described below are some implementation methods of the present invention. For ordinary technicians in this field, other drawings can be obtained based on these drawings without paying creative work.

[0040] Figure 1 A partial structural schematic diagram of a shielding system according to an embodiment of the present invention;

[0041] Figure 2 The present invention is a structural schematic diagram of a drainage device without a drainage member according to an embodiment of the present invention.

[0042] Description of reference numerals:

[0043] 1. Support structure; 2. Membrane structure; 3. Drainage structure; 301. Bottom plate; 302. Side plate; 4. Drainage piece; 5. Groove; 6. Fixing assembly; 601. First fixing piece; 602. Second fixing piece; 7. Connecting piece; 8. Reinforcing piece; 9. Flexible piece; 10. First connector; 11. Second connector. DETAILED DESCRIPTION

[0044] In order to make the purpose, technical solution and advantages of the embodiments of the present invention clearer, the technical solution in the embodiments of the present invention will be clearly and completely described below in conjunction with the drawings in the embodiments of the present invention. Obviously, the described embodiments are part of the embodiments of the present invention, not all of the embodiments. Based on the embodiments of the present invention, all other embodiments obtained by those skilled in the art without creative work are within the scope of protection of the present invention.

[0045] Combine the following Figure 1 to Figure 2 , describing an embodiment of the present invention.

[0046] According to an embodiment of the present invention, on the one hand, a drainage device is provided, which is used to be fixedly connected between a supporting structure 1 and a membrane structure 2, including: a drainage structure 3, which is fixed on the supporting structure 1, and the drainage structure 3 has a accommodating cavity, and one end of the drainage structure 3 away from the supporting structure 1 is fixedly connected to the membrane structure 2; a drainage member 4, which is arranged in the accommodating cavity, and a drainage channel is provided in the drainage member 4, and the bottom end of the drainage member 4 is inclined to drain water in the drainage channel.

[0047] By setting the drainage member 4 and tilting the bottom end of the drainage member 4 to form a drainage slope, the water in the drainage channel can be drained away, and then the membrane structure 2 can be set as a plane structure to reduce the use of supporting components, reduce construction costs and construction difficulties, and make the force more uniform and the structural stability better; at the same time, it can reduce the dead weight of the structure, thereby improving the service life and bearing capacity of the structure; avoiding the deposition of silt in the drainage channel and causing the risk of leakage, which can reduce the subsequent maintenance costs.

[0048] like Figure 1 As shown, in one embodiment, the supporting structure 1 is a purlin support, and a plurality of purlin supports are arranged at intervals above the truss structure, and a drainage structure 3 is fixed above the purlin support. The purlin support and the drainage structure 3 are welded by circumferential welding. By fixing the drainage structure 3 above the purlin support, the drainage structure 3 can also serve as a purlin, thereby saving materials, reducing the installation process, and reducing the dead weight of the structure. As a convertible embodiment, the supporting structure 1 may also be a truss structure, that is, the drainage structure 3 is directly fixed above the truss structure. As a convertible embodiment, a clamping groove may be provided on the purlin support, and the drainage structure 3 may be arranged in the clamping groove, or the purlin support and the drainage structure 3 may be fixedly connected by bolts, and no excessive restrictions are made here.

[0049] In one embodiment, the membrane structure 2 is supported by an arc-shaped steel pipe, and the end of the membrane structure 2 is inclined.

[0050] like Figure 2 As shown, in one embodiment, the cross section of the drainage structure 3 is "U" shaped, including a bottom plate 301 and two oppositely arranged side plates 302, and the bottom plate 301 and the two side plates 302 form a receiving cavity. The thickness of the bottom plate 301 and the side plates 302 is 8 mm, the width of the bottom plate 301 is 200 mm, and the width of the side plates 302 is 300 mm; the end of the side plate 302 away from the bottom plate 301 is bent outward at 45°; the bottom plate 301 and the side plates 302 are steel plates. The width direction of the bottom plate 301 is Figure 2 The horizontal direction of the side plate 302 is Figure 2In the vertical direction. As a convertible embodiment, the drainage structure 3 may also include a detachably connected top plate with a square cross-section, which is not subject to too many restrictions here. As a convertible embodiment, the thickness of the bottom plate 301 and the side plate 302 may also be 7mm or 9mm, which is not subject to too many restrictions here. As a convertible embodiment, the width of the bottom plate 301 may also be 190mm or 210mm, which is not subject to too many restrictions here. As a convertible embodiment, the width of the side plate 302 may also be 290mm or 310mm, which is not subject to too many restrictions here. As a convertible embodiment, the end of the side plate 302 away from the bottom plate 301 may also be bent outward by 40° or 50°, and the angle at which the end of the side plate 302 is bent outward is adjusted according to the inclination angle of the end of the membrane structure 2, which is not subject to too many restrictions here. As a convertible embodiment, the bottom plate 301 and the side plate 302 may also be made of aluminum or other rigid materials, which is not subject to too many restrictions here.

[0051] In one embodiment, the drainage member 4 is a flexible member. The cross-section of the drainage member 4 in the drainage structure 3 is "U"-shaped, and the closed end of the "U"-shaped structure forms a drainage channel; the flexible member is made of waterproof material. By using a flexible member as the drainage member 4, it is easy to adjust the inclination angle of the drainage member 4, and the weight of the flexible member is relatively light, which can reduce the deadweight of the structure. As a convertible embodiment, the cross-sectional shape of the drainage member 4 in the drainage structure 3 is determined according to the shape of the accommodating cavity, and no excessive restrictions are made here.

[0052] like Figure 2 As shown, in one embodiment, along the extension length direction of the drainage structure 3, two fixing positions are arranged on the inner wall of the drainage structure 3 at intervals, and along the extension height direction of the drainage structure 3, the distances between the two fixing positions and the bottom end of the drainage structure 3 are different, and the drainage member 4 is fixedly connected to the drainage structure 3 through the fixing positions. Specifically, two fixing positions are arranged on the inner walls of the two side plates 302 at intervals, and the fixing positions on the two side plates 302 are arranged oppositely; the fixing position is a groove 5, and the drainage member 4 extends into the groove 5 for fixing, and the groove 5 is a circular groove, and the depth of the circular groove is 4mm. By setting the distances between the two fixing positions and the bottom end of the drainage structure 3 to be different, an inclination angle can be formed between the bottom end of the drainage member 4 and the bottom end of the drainage structure 3, thereby facilitating drainage. As a convertible embodiment, it can also be that along the extension length direction of the drainage structure 3, three or four fixing positions are arranged on the inner wall of the drainage structure 3 at intervals, and no excessive restrictions are made here. As a convertible embodiment, the fixing position can also be a protrusion, and the drainage member 4 is supported above the protrusion for fixing.

[0053] In one embodiment, a plurality of fixed positions are provided at intervals along the extension height direction of the drainage structure 3. By providing a plurality of fixed positions at intervals along the extension height direction of the drainage structure 3, the inclination angle between the bottom end of the drainage member 4 and the bottom end of the drainage structure 3 can be adjusted, so that the drainage channels between the plurality of drainage structures 3 can be gradually inclined without drainage dead angles. As a convertible embodiment, the fixed position can also be a slide groove, and the drainage member 4 slides in the slide groove to adjust the inclination angle between the bottom end of the drainage member 4 and the bottom end of the drainage structure 3.

[0054] like Figure 2 As shown, in one embodiment, the drainage device includes: a fixing component 6, the two ends of which extend into two oppositely arranged grooves 5, respectively, for fixing the drainage member 4. The fixing component 6 extends into the groove 5 from the inner side of the drainage channel, and then fixes the bottom end of the drainage member 4 in the groove 5. By fixing the drainage member 4 in the groove 5 with the fixing component 6, the position of the drainage member 4 can be adjusted according to the inclination angle, and the fixing method is simple and the fixing is firm. As a convertible embodiment, a clamping member can also be provided in the groove 5, and the drainage member 4 extends into the groove 5 and is clamped and fixed by the clamping member.

[0055] like Figure 2 As shown, in one embodiment, the fixing assembly 6 includes: a first fixing member 601; a second fixing member 602, which is telescopically connected to the first fixing member 601 and is used to adjust the length of the fixing assembly 6. Specifically, one end of the first fixing member 601 is provided with a concave cavity, and the concave cavity is provided with an internal thread, and one end of the second fixing member 602 is provided with an external thread, and the second fixing member 602 extends into the concave cavity for threaded fixing. By setting the fixing assembly 6 as a telescopic structure, it is convenient to adjust the length of the fixing assembly 6, so that the two ends of the fixing assembly 6 are respectively extended into two oppositely arranged grooves 5. As a convertible embodiment, it is also possible that the fixing assembly 6 is an elastic structure, and the two ends of the elastic structure are respectively extended into the two grooves 5 by using elasticity.

[0056] like Figure 2 As shown, in order to prevent the first fixing member 601 and the second fixing member 602 from relative movement, a plurality of through holes are provided at one end of the first fixing member 601 and one end of the second fixing member 602. After the second fixing member 602 is inserted into the concave cavity of the first fixing member 601, the first plug-in connector 10 is inserted into the through hole for fixing. The first plug-in connector 10 is a latch. As a convertible embodiment, a through hole may be provided at one end of the first fixing member 601 and a plurality of through holes may be provided at one end of the second fixing member 602, or a plurality of through holes may be provided at one end of the first fixing member 601 and a through hole may be provided at one end of the second fixing member 602. As a convertible embodiment, the first plug-in connector 10 may also be a cylinder or a screw, and no excessive restrictions are made here.

[0057] like Figure 1 As shown, in one embodiment, the drainage device includes: a connecting member 7, which is fixedly connected to the end of the drainage structure 3 away from the supporting structure 1, and is used to fix the membrane structure 2. Specifically, two connecting members 7 are provided at intervals on the ends of the two side panels 302 away from the bottom plate 301; the connecting member 7 is a flat plate, which is welded and fixed to the side panels 302. By providing the connecting member 7, the connection with the membrane structure 2 is tighter, and the end of the membrane structure 2 can be guided to the top of the drainage channel to prevent water from flowing into the gap between the drainage member 4 and the drainage structure 3 and being unable to be drained. As a convertible embodiment, it is also possible that three or four connecting members 7 are provided on each side panel 302, and there is no excessive restriction here.

[0058] like Figure 1 As shown, in one embodiment, a through hole is provided on the connecting member 7, and the membrane structure 2 is provided on one side of the connecting member 7. A second connector 11 is inserted into the through hole to fix the membrane structure 2. The second connector 11 is a bolt; and a gasket is provided between the head of the bolt and the membrane structure 2 to prevent the head of the bolt from scratching the membrane structure 2. As a convertible embodiment, the end of the membrane structure 2 can also be tied to the connecting member 7 with a cable tie, or the end of the membrane structure 2 can be glued to the connecting member 7 with glue, as long as the membrane structure 2 can be fixed to the connecting member 7. As a convertible embodiment, the second connector 11 can also be a rivet or a screw, and there is no excessive restriction here.

[0059] like Figure 1 As shown, in one embodiment, the connecting member 7 is tilted to match the tilt angle of the membrane structure 2. By tilting the connecting member 7, it can be adapted to the shape of the end of the membrane structure 2, thereby preventing the end of the drainage structure 3 from scratching the membrane structure 2 or abrading and shortening the service life. As a convertible embodiment, a flexible support member can also be fixed at the end of the drainage structure 3, and the connecting member 7 can be horizontally arranged, and there is no excessive restriction here.

[0060] In one embodiment, one end of the drainage member 4 away from the supporting structure 1 is fixedly connected to the connecting member 7. Specifically, the drainage member 4 is arranged on the other side of the connecting member 7, and the second connector 11 is used to fix the drainage member 4. A gasket is provided between the nut and the drainage member 4 to prevent the nut from scratching the drainage member 4. By fixing the drainage member 4 to the connecting member 7, it is possible to prevent water from flowing into the gap between the drainage member 4 and the drainage structure 3 and being unable to be drained away. As a convertible embodiment, it is also possible that the end of the drainage member 4 is arranged close to the side plate 302, such as being glued to the side plate 302, and is not fixedly connected to the connecting member 7.

[0061] like Figure 2As shown, in one embodiment, a reinforcing member 8 is provided between two oppositely disposed connecting members 7. The reinforcing member 8 is a stiffening plate with a thickness of 5 mm. Figure 2 The reinforcing member 8 is provided to improve the strength of the connecting member 7 and prevent cracking between the connecting member 7 and the drainage structure 3. As a convertible embodiment, the contact area between the connecting member 7 and the side plate 302 can be increased, and the reinforcing member 8 can be omitted. As a convertible embodiment, the thickness of the reinforcing member 8 can also be 4 mm or 6 mm, and no excessive restrictions are made here.

[0062] According to an embodiment of the present invention, on the other hand, a shielding system is provided, including: a supporting structure 1; a membrane structure 2, which is spaced apart from the supporting structure 1; and the above-mentioned drainage device, which is fixedly connected between the supporting structure 1 and the membrane structure 2.

[0063] In one embodiment, a plurality of drainage devices are provided, and the distance between the bottom end of the drainage member 4 of each drainage device and the bottom end of the drainage structure 3 is different. By setting the distance between the bottom end of the drainage member 4 of each drainage device and the bottom end of the drainage structure 3 to be different, the plurality of drainage channels can be gradually inclined, thereby avoiding the occurrence of drainage dead angles.

[0064] In one embodiment, Figure 1 As shown, a flexible member 9 is provided at one end of the drainage structure 3 away from the supporting structure 1, and the flexible member 9 is used to support the membrane structure 2. The flexible member 9 is a rubber pad, and the rubber pad is provided with a cavity, and the cavity of the rubber pad is inserted into the end of the side plate 302 for fixing. By providing the flexible member 9, the membrane structure 2 can be prevented from being scratched, thereby causing danger.

[0065] Furthermore, a rubber pad is also provided in the groove 5 to support the drainage member 4. Specifically, the rubber pad drives the drainage member 4 to be fixed in the groove 5, and the cavity is arranged toward the drainage channel, and the end of the fixing component 6 extends into the cavity for fixing. As a convertible embodiment, the end of the drainage structure 3 and the groove 5 can also be chamfered, and the flexible member 9 can be omitted. As a convertible embodiment, the flexible member 9 can also be a silicone pad or other structure with a buffering property, and no excessive restrictions are made here.

[0066] Although the embodiments of the present invention have been described in conjunction with the accompanying drawings, those skilled in the art may make various modifications and variations without departing from the spirit and scope of the present invention, and such modifications and variations are all within the scope defined by the appended claims.

Claims

1. A drainage device, used for fixed connection between a support structure (1) and a membrane structure (2), characterized in that: include: A drainage structure (3) is fixed on the supporting structure (1), the drainage structure (3) has a receiving cavity, and one end of the drainage structure (3) away from the supporting structure (1) is fixedly connected to the membrane structure (2); A drainage member (4) is arranged in the accommodating cavity, a drainage channel is arranged in the drainage member (4), and the bottom end of the drainage member (4) is arranged at an angle to drain water in the drainage channel.

2. The drainage device according to claim 1, characterized in that: At least two fixing positions are arranged at intervals on the inner wall of the drainage structure (3) along the extension length direction of the drainage structure (3); along the extension height direction of the drainage structure (3), the distances between at least two of the fixing positions and the bottom end of the drainage structure (3) are different; and the drainage member (4) is fixedly connected to the drainage structure (3) via the fixing positions.

3. The drainage device according to claim 2, characterized in that: The fixing position is a groove (5); And / or, along the extension height direction of the drainage structure (3), a plurality of fixing positions are arranged at intervals.

4. The drainage device according to claim 3, characterized in that: The flow guiding member (4) is a flexible member.

5. The drainage device according to claim 4, characterized in that: The drainage device comprises: A fixing component (6), two ends of which extend into two oppositely arranged grooves (5) respectively, for fixing the flow guide member (4).

6. The drainage device according to claim 5, characterized in that: The fixing assembly (6) comprises: A first fixing member (601); The second fixing member (602) is telescopically connected to the first fixing member (601) and is used to adjust the length of the fixing assembly (6).

7. The drainage device according to any one of claims 1 to 6, characterized in that: The drainage device comprises: A connecting member (7) is fixedly connected to an end of the drainage structure (3) away from the supporting structure (1) and is used for fixedly connecting the membrane structure (2).

8. The drainage device according to claim 7, characterized in that: One end of the flow guide member (4) away from the supporting structure (1) is fixedly connected to the connecting member (7); And / or, at least two connecting members (7) are provided, and a reinforcing member (8) is provided between two connecting members (7) arranged opposite to each other; And / or, the connecting member (7) is arranged to be inclined so as to match the inclination angle of the membrane structure (2).

9. A shielding system, characterized in that: include: Support structure (1); A membrane structure (2) is spaced apart from the support structure (1); The drainage device according to any one of claims 1 to 8 is fixedly connected between the supporting structure (1) and the membrane structure (2).

10. The shielding system according to claim 9, characterized in that: The drainage device is provided in plurality, and the distance between the bottom end of the drainage member (4) of each drainage device and the bottom end of the drainage structure (3) is different; And / or, a flexible member (9) is provided at one end of the drainage structure (3) away from the supporting structure (1), and the flexible member (9) is used to support the membrane structure (2).

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