Sponge city planting roof drainage system

Abstract

The utility model relates to a kind of sponge city planting roof drainage systems, to solve the problem that filter layer uses geotextile in existing system easily appears. The system includes planting layer and planting roof, and filter layer and drainage layer are provided between the two from top to bottom. Drainage layer contains water storage board, and there is protruding part on its mounting plate to form drainage channel. Upper and lower plates are respectively arranged on the upper and lower sides of filter layer, and both are hard mesh plate, with through micropore. Protruding part is in the shape of circular truncated cone, and is connected with the limiting groove of lower plate. Anti-slip structure is arranged on the side of upper and lower plates relative to filter layer, and edge is sealed with rubber sealing strip, and the sealing strip has protruding excess part. Upper and lower plates are made of polypropylene material, and through the above structure, the stability of filter layer is enhanced, deformation, damage and displacement are prevented, drainage channel is avoided to be blocked, and stable operation of drainage system is ensured.

Description

Technical Field

[0001] This utility model relates to the field of drainage system technology, and in particular to a drainage system for green roofs in sponge cities. Background Technology

[0002] Sponge city construction, as a new concept for urban rainwater management, aims to enhance urban flood control and drainage capabilities, improve water quality, and promote the efficient use of water resources through various technologies such as infiltration, retention, storage, purification, utilization, and drainage. Green roofs, as an important component of sponge city construction, not only increase urban green space and improve urban ecological quality, but also effectively mitigate the urban heat island effect, reduce rainwater runoff, and achieve natural rainwater accumulation, infiltration, and purification. Among these, the drainage system of green roofs in sponge cities plays a crucial role; it is a key link in ensuring the normal functioning of green roofs and achieving rational rainwater management.

[0003] The existing green roof drainage system mainly includes a vegetation layer, a planting substrate layer, a filter layer, a drainage layer, a waterproof layer, and drainage pipes connecting the drainage layer. When it rains, rainwater will seep into the vegetation layer, then pass through the substrate layer and filter layer into the drainage layer, and then be discharged into the municipal drainage system through the drainage pipes connected to the drainage layer.

[0004] Current filter layers typically use geotextile, which covers the drainage and water storage board of the drainage layer. This allows water to enter the drainage channels of the drainage and water storage board while filtering soil particles. However, geotextile is a soft material, and it can deform and break when subjected to pressure from the planting soil, punctures from sharp objects, or impacts from water flow. This reduces the filtration effect and can even cause the drainage system to fail. In particular, the drainage channels of the drainage and water storage board are formed by several protrusions. This causes the soft geotextile to easily get stuck in the drainage channels after being deformed under pressure, resulting in narrowing and blockage of the drainage channels and affecting the normal drainage. Utility Model Content

[0005] The main purpose of this utility model is to provide a drainage system for green roofs in sponge cities, which aims to solve the problem that when geotextile is used as the filter layer in the existing drainage system for green roofs in sponge cities, the material is soft and easily deformed and damaged by the pressure of the planting soil, puncture by sharp objects and water flow impact, resulting in reduced filtration effect, blocked drainage channels and drainage system failure.

[0006] To achieve the above objectives, this utility model proposes a drainage system for a sponge city green roof, comprising a planting layer and a planting roof slab disposed below the planting layer. A filter layer and a drainage layer are disposed between the planting layer and the planting roof slab from top to bottom. The drainage layer includes a water-storage plate disposed below the filter layer. The water-storage plate includes an mounting plate disposed on the planting roof slab. The mounting plate is provided with several protrusions, and drainage channels are formed between the several protrusions. The system also includes a lower plate disposed between the water-storage plate and the filter layer, and an upper plate disposed above the filter layer. Both the upper plate and the lower plate are made of rigid perforated plate with several through-holes distributed on their top surfaces.

[0007] In one possible implementation, the protrusion is frustum-shaped, with a support surface formed at the end away from the mounting plate that abuts against the lower plate.

[0008] In one possible implementation, the bottom surface of the lower plate is recessed inward to form a plurality of limiting grooves corresponding to the positions of the protrusions. The cross-section of the limiting grooves is conical, and they engage with the ends of the protrusions.

[0009] In one possible implementation, the upper plate and the lower plate are provided with anti-slip structures on one side of the filter layer, the anti-slip structures being used to increase the friction between the upper plate and the filter layer, and between the lower plate and the filter layer.

[0010] In one possible implementation, the anti-slip structure is a rubber sealing strip, and a notch is provided on one side edge of the upper plate and the lower plate opposite to the filter layer. The notch is in the shape of a rectangular frame, and the rubber sealing strip is fixed at the notch.

[0011] In one possible implementation, the rubber sealing strip extends horizontally in all directions to form a slack portion, which protrudes from the periphery of the upper and lower plates.

[0012] In one possible implementation, both the upper and lower plates are made of polypropylene.

[0013] In summary, the beneficial effects of this application are as follows:

[0014] Compared with existing technologies, this application effectively solves the aforementioned problems by setting a lower plate between the drainage and storage plate and the filter layer, and setting an upper plate above the filter layer. Both the upper and lower plates are made of rigid mesh plates with through-holes. The rigid upper and lower plates provide strong support for the filter layer, preventing it from deforming or breaking due to pressure, puncture, and water flow impact, thus ensuring the filtration effect and maintaining the normal operation of the drainage system. At the same time, it prevents the filter layer from sinking into the drainage channel of the drainage and storage plate, ensuring that the drainage channel is unobstructed and drainage is smooth.

[0015] The anti-slip structure along the edge of the upper and lower panels opposite the filter layer increases friction with the filter layer, ensuring a tighter bond between the filter layer and the panels. This prevents displacement of the filter layer during use, guaranteeing system stability and filtration efficiency. Rubber sealing strips, used as an anti-slip structure and positioned at the rectangular frame-like notches along the edge of the upper and lower panels opposite the filter layer, effectively prevent rainwater leakage at the connection point, improving system sealing. The protruding portions of the rubber sealing strip extending horizontally around the upper and lower panels further enhance the sealing effect. Furthermore, the upper and lower panels are made of polypropylene, a material with excellent chemical resistance, good plasticity, hygiene, environmental friendliness, and fatigue resistance. This material not only adapts to the complex chemical environment of green roofs, meeting various design requirements, but also complies with environmental regulations and maintains good performance over long-term use, extending the service life of the drainage system. Attached Figure Description

[0016] To more clearly illustrate the technical solutions in the embodiments of this utility model 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 this utility model. For those skilled in the art, other drawings can be obtained based on the structures shown in these drawings without creative effort.

[0017] Figure 1 This is a schematic diagram of the structure of this utility model;

[0018] Figure 2 This is a schematic diagram of the drainage layer of this utility model;

[0019] Figure 3 This is a schematic diagram of the structure of the water storage and drainage plate of this utility model;

[0020] Figure 4 This is an exploded structural diagram of the water storage and drainage plate of this utility model;

[0021] Figure 5 for Figure 4 Enlarged view at point A;

[0022] Explanation of icon numbers:

[0023] 1. Planting layer; 2. Planting top plate; 3. Planting substrate layer; 4. Filter layer; 5. Drainage layer; 50. Water storage plate; 51. Drainage channel; 52. Siphon guide pipe; 53. Siphon drainage pipe; 54. First drainage pipe; 55. Second drainage pipe; 56. Inspection well; 57. Rainwater well; 58. Protrusion; 59. Mounting plate; 6. Root penetration resistant layer; 7. Waterproof layer; 8. Leveling layer; 9. Upper plate; 10. Lower plate; 11. Limiting groove; 12. Anti-slip structure; 13. Notch; 14. Rubber sealing strip; 15. Excess portion.

[0024] The realization of the purpose, functional features and advantages of this utility model will be further explained in conjunction with the embodiments and with reference to the accompanying drawings. Detailed Implementation

[0025] To make the objectives, technical solutions, and advantages of this application clearer, the following detailed description is provided in conjunction with the accompanying drawings and embodiments. It should be understood that the specific embodiments described herein are merely illustrative and not intended to limit the scope of this application.

[0026] like Figure 1-5 As shown, this utility model proposes a drainage system for a green roof in a sponge city, including a planting layer 1 and a planting top slab 2 disposed below the planting layer 1, as follows: Figure 2 As shown, between the planting layer 1 and the planting top plate 2, from top to bottom, there are a planting substrate layer 3, a filter layer 4, a drainage layer 5, a root penetration resistant layer 6, a waterproof layer 7, and a leveling layer 8. The drainage layer 5 includes a water storage plate 50 with a drainage channel 51. The water storage plate 50 is connected to a siphon guide pipe 52. The siphon guide pipe 52 is connected to a first drainage pipe 54 through a siphon drainage pipe 53. Then, the first drainage pipe 54 is connected to an inspection well 56. Then, the inspection well 56 is connected to a rainwater well 57 through a second drainage pipe 55. It also includes a ventilated pipe connecting the drainage layer 5.

[0027] When rainfall occurs, the rainwater first comes into contact with the planting layer 1. The vegetation in the planting layer 1 plays a preliminary role in intercepting and buffering the rainwater. Some of the rainwater is absorbed by the vegetation, while some flows down the surface of the vegetation to the planting substrate layer 3.

[0028] After rainwater enters the planting substrate layer 3, the substrate layer acts like a giant sponge, absorbing and storing some of the rainwater to meet the needs of subsequent plant growth. Excess rainwater continues to seep downwards under the influence of gravity, passing through the filter layer 4.

[0029] The filter layer 4 intercepts impurities such as planting substrate particles carried in rainwater, ensuring that only relatively clean rainwater can enter the drainage layer 5 below. The water-storage plate 50 in the drainage layer 5 plays a crucial role; its drainage channels 51 collect rainwater from the filter layer 4 and, utilizing its structural features, temporarily store a certain amount of rainwater. As rainfall gradually increases and the water level within the water-storage plate 50 rises to a certain height, the siphon effect begins to occur.

[0030] The siphon guide pipe 52 connected to the water storage plate 50 gradually expels air due to the internal water level difference and pipe structure design, creating a negative pressure environment. Under this negative pressure suction, rainwater in the water storage plate 50 quickly passes through the siphon guide pipe 52 and enters the connected siphon drainage pipe 53. The siphon drainage pipe 53 efficiently transports the rainwater to the first drainage pipe 54, and then the rainwater flows into the inspection well 56 along the first drainage pipe 54.

[0031] Inspection well 56 has the function of sedimentation and preliminary filtration, where some residual impurities that may be carried in the rainwater will settle. After preliminary treatment, the rainwater continues to flow through the second drainage pipe 55 connected to inspection well 56, and finally flows into rainwater well 57, thus completing the entire drainage process.

[0032] And such Figure 2-3 As shown, the drainage and storage plate 50 includes an installation plate 59 disposed on the planting top plate 2, the installation plate 59 having a plurality of protrusions 58, and drainage channels 51 formed between the plurality of protrusions 58; it also includes a lower plate 10 disposed between the drainage and storage plate 50 and the filter layer 4 and an upper plate 9 disposed above the filter layer 4, both the upper plate 9 and the lower plate 10 being rigid perforated plates made of polypropylene, with a plurality of through-holes distributed on their top surfaces, allowing water to flow smoothly through the upper plate 9 and the lower plate 10.

[0033] And such Figure 3 As shown, further examining the protrusion 58, it is frustum-shaped, with its end furthest from the mounting plate 59 forming a support surface that abuts against the lower plate 10. Meanwhile, as... Figure 4-5 As shown, the bottom surface of the lower plate 10 is recessed inward, forming several limiting grooves 11 corresponding to the positions of the protrusions 58. The cross-section of the limiting grooves 11 is conical, which can be precisely engaged with the ends of the protrusions 58. This design makes the connection between the water storage plate 50 and the upper and lower plates 10 more stable.

[0034] In addition, in order to better integrate the filter layer 4 with the upper and lower plates 10, in one possible embodiment, the upper plate 9 and the lower plate 10 are provided with anti-slip structures 12 on the side edges opposite to the filter layer 4. The anti-slip structures 12 can increase the friction between the upper plate 9 and the filter layer 4, and between the lower plate 10 and the filter layer 4, to prevent the filter layer 4 from shifting during use.

[0035] For sealing, a rubber sealing strip 14 is used as the anti-slip structure. A rectangular frame-shaped notch 13 is provided on one edge of the upper plate 9 and lower plate 10 opposite to the filter layer 4, and the rubber sealing strip is fixed at this notch 13. It is worth mentioning that the rubber sealing strip 14 extends horizontally in all directions to form a surplus portion 15. The surplus portion 15 protrudes from the periphery of the upper plate 9 and lower plate 10, which further enhances the sealing effect and prevents rainwater leakage from the connection between the filter layer 4 and the upper and lower plates 10.

[0036] When rainfall begins, rainwater first falls on planting layer 1, where the vegetation initially intercepts the rainwater, reducing its impact velocity. Subsequently, the rainwater passes through planting substrate layer 3, which acts like a giant filter, removing some impurities and absorbing and storing some moisture to meet the plant's growth needs. When planting substrate layer 3 can no longer hold excess rainwater, it seeps into filter layer 4 under gravity.

[0037] Filter layer 4 plays a crucial role in fine filtration, intercepting fine particulate impurities remaining in rainwater to ensure that the rainwater entering the drainage system is relatively clean. After filtration, the rainwater flows downwards through the micropores of the upper plate 9. Because the upper plate 9 is a rigid perforated plate, it effectively prevents filter layer 4 from deforming or breaking due to pressure from the planting soil above, puncture from sharp objects, and water flow impact, thus solving the problem of reduced filtration efficiency caused by easy damage to traditional geotextile filter layers 4.

[0038] Rainwater enters the drainage channel 51 formed by the protrusion 58 of the water storage plate 50. At this time, the protrusion 58 of the water storage plate 50 is tightly fitted with the lower plate 10. The protrusion 58 is frustoconical, and its supporting surface at the end away from the mounting plate 59 abuts against the lower plate 10. The limiting groove 11 of the lower plate 10 is engaged with the end of the protrusion 58. This stable connection structure ensures the stability of the drainage channel 51 and avoids deformation or blockage of the drainage channel 51 due to loose connection, effectively solving the problem of poor drainage. Rainwater collects in the drainage channel 51, and when it reaches a certain water level, it is discharged through facilities such as the siphon guide pipe 52 and the siphon drainage pipe 53.

[0039] During this process, the anti-slip structure 12 set on the edge of the upper plate 9 and the lower plate 10 opposite to the filter layer 4 greatly increases the friction between them and the filter layer 4. This allows the filter layer 4 to remain in the correct position and not shift under long-term water flow and other external forces, thus ensuring that it always performs its filtering function stably and further guaranteeing the normal operation of the drainage system.

[0040] Regarding the anti-slip structure, the rubber sealing strip 14 is fixed at the rectangular frame-like notch 13 on the edge of the upper plate 9 and lower plate 10 opposite to the filter layer 4, and the excess portion 15 extending horizontally in all directions protrudes from the upper plate 9 and lower plate 10. This design greatly enhances the sealing effect. It effectively prevents rainwater from leaking from the connection between the filter layer 4 and the upper and lower plates 10, preventing damage to the roof structure caused by rainwater leakage, and solving a series of problems that may be caused by rainwater leakage, such as roof structure corrosion and indoor leakage, ensuring the long-term reliability and stability of the entire drainage system.

[0041] In the accompanying drawings of this embodiment, the same or similar reference numerals correspond to the same or similar components. In the description of this application, it should be understood that if terms such as "upper," "lower," "left," and "right" indicate the orientation or positional relationship based on the orientation or positional relationship shown in the accompanying drawings, they are only for the convenience of describing this application 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. Therefore, the terms used to describe positional relationships in the accompanying drawings are only for illustrative purposes and should not be construed as limiting this patent. For those skilled in the art, the specific meaning of the above terms can be understood according to the specific circumstances.

[0042] The above are merely preferred embodiments of this application and are not intended to limit this application. Any modifications, equivalent substitutions, and improvements made within the spirit and principles of this application should be included within the protection scope of this application.

Claims

1. A sponge city green roof drainage system, comprising a planting layer (1) and a planting roof slab (2) disposed below the planting layer (1), wherein a filter layer (4) and a drainage layer (5) are disposed from top to bottom between the planting layer (1) and the planting roof slab (2), characterized in that, The drainage layer (5) includes a water storage plate (50) disposed below the filter layer (4), the water storage plate (50) includes an installation plate (59) disposed on the planting top plate (2), the installation plate (59) is provided with a plurality of protrusions (58), and a drainage channel (51) is formed between the plurality of protrusions (58); it also includes a lower plate (10) disposed between the water storage plate (50) and the filter layer (4) and an upper plate (9) disposed above the filter layer (4), the upper plate (9) and the lower plate (10) are both made of rigid perforated plate, and a plurality of through-holes are distributed on their upper surfaces.

2. The sponge city green roof drainage system according to claim 1, characterized in that, The protrusion (58) is frustum-shaped, and its end away from the mounting plate (59) forms a support surface that abuts against the lower plate (10).

3. The sponge city green roof drainage system according to claim 2, characterized in that, The bottom surface of the lower plate (10) is recessed inward to form a plurality of limiting grooves (11) corresponding to the positions of the protrusions (58). The cross-section of the limiting grooves (11) is conical, and they are engaged with the ends of the protrusions (58).

4. A sponge city green roof drainage system according to claim 3, characterized in that, The upper plate (9) and the lower plate (10) are provided with anti-slip structures (12) on one side of the filter layer (4) respectively. The anti-slip structures (12) are used to increase the friction between the upper plate (9) and the filter layer (4) and between the lower plate (10) and the filter layer (4).

5. A sponge city green roof drainage system according to claim 4, characterized in that, The anti-slip structure (12) is a rubber sealing strip (14). The upper plate (9) and the lower plate (10) have a notch (13) on one side edge opposite to the filter layer (4). The notch (13) is in the shape of a rectangular frame. The rubber sealing strip is fixed at the notch (13).

6. A sponge city green roof drainage system according to claim 5, characterized in that, The rubber sealing strip (14) extends horizontally in all directions to form a margin (15), which protrudes from the periphery of the upper plate (9) and the lower plate (10).

7. A sponge city green roof drainage system according to claim 1, characterized in that, Both the upper plate (9) and the lower plate (10) are made of polypropylene.

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