Double waterproofing and double drainage system for roof

Abstract

The utility model relates to building roof waterproof drainage technical field provides a roof double -prevention double -drainage system, it includes roof structure, parapet, pitch layer, first waterproof layer, thermal -insulation layer, leveling layer, second waterproof layer and protective layer, parapet is vertically fixed on the outer periphery of roof structure, and the first drainage port and the second drainage port arranged in turn from below to above are equipped on parapet, and the first drainage port and the second drainage port are communicated with external drainage system, thermal -insulation layer is equipped in the side of first waterproof layer away from pitch layer, and the drainage exhaust pipe network is arranged in thermal -insulation layer, a plurality of communication holes communicated with thermal -insulation layer are equipped on the pipe wall of drainage exhaust pipe network, and drainage exhaust pipe network extends to parapet and is communicated with the first drainage port on parapet, the side of protective layer away from second waterproof layer is communicated with second drainage port and is arranged, the application has realized from the improvement new -built residential roof waterproof drainage performance, improved the overall quality and service life of roof, and the moisture discharge of thermal -insulation layer is considered simultaneously.

Description

Technical Field

[0001] This utility model relates to the field of building roof waterproofing and drainage technology, and in particular to a roof double waterproofing and double drainage system. Background Technology

[0002] In newly constructed residential buildings, roof waterproofing and drainage are prominent issues. Traditional new roofs typically have only one drain outlet. When the waterproofing layer above the insulation layer leaks, the water cannot drain effectively and promptly, accumulating on the roof and continuously eroding the waterproofing layer. This severely impacts the roof's waterproofing performance, shortens its lifespan, and increases maintenance costs. Furthermore, existing roof drainage systems are insufficient to handle heavy rainfall and other extreme weather conditions, easily leading to localized water accumulation and further exacerbating the risk of structural damage. Moreover, if moisture in the roof's insulation layer cannot be expelled in time, it will affect the insulation effect, causing unstable indoor temperatures and increasing energy consumption. Utility Model Content

[0003] This utility model provides a double-proof and double-drainage roof system to solve the technical defects of existing technologies where, when the waterproof layer above the insulation layer leaks, the accumulated water cannot be effectively drained in time, causing it to accumulate on the roof for a long time, continuously eroding the waterproof layer, seriously affecting the waterproof performance of the roof, shortening the roof's service life, and increasing the maintenance costs of the building. The system improves the waterproof and drainage performance of newly built residential roofs, enhances the overall quality and service life of the roof, and also takes into account the drainage of water vapor from the insulation layer.

[0004] This utility model provides a roof double-proof and double-drainage system, including:

[0005] Roof structure;

[0006] The parapet wall is vertically fixed to the outer perimeter of the roof structure. The parapet wall is provided with a first drainage outlet and a second drainage outlet arranged sequentially from bottom to top. The first drainage outlet and the second drainage outlet are connected to the external drainage system.

[0007] A slope-finding layer is provided on the upper surface of the roof structure;

[0008] The first waterproof layer is located on the side of the slope-finding layer that is away from the roof structure.

[0009] The insulation layer is located on the side of the first waterproof layer away from the slope layer. A drainage and venting pipe network is arranged inside the insulation layer. The pipe wall of the drainage and venting pipe network is provided with a plurality of connecting holes that communicate with the insulation layer. The drainage and venting pipe network extends to the parapet wall and communicates with the first drainage outlet on the parapet wall.

[0010] A leveling layer is provided on the side of the insulation layer that is away from the first waterproof layer;

[0011] The second waterproof layer is located on the side of the leveling layer that is away from the insulation layer.

[0012] A protective layer is provided on the side of the second waterproof layer away from the leveling layer, and the side of the protective layer away from the second waterproof layer is connected to the second drain outlet.

[0013] According to the present invention, a roof double-proof and double-drainage system is provided, wherein the layout of the drainage and exhaust pipe network coincides with the division joint of the leveling layer.

[0014] According to the present invention, a roof double-proof and double-drainage system is provided, wherein the slope of the drainage and exhaust pipe network is consistent with the slope of the roof drainage.

[0015] According to the present invention, a roof double-proof and double-drainage system further includes a first external drainage pipe, a second external drainage pipe, and a drain pipe. The drain pipe is vertically arranged on the outside of the parapet wall. The first external drainage pipe passes through the first drainage outlet and is connected between the drainage and venting pipe network and the drain pipe. The second external drainage pipe passes through the second drainage outlet and is connected between the upper space of the protective layer and the drain pipe.

[0016] According to the present invention, a roof double-proof and double-drainage system is provided, wherein the upper end of the drain pipe is provided with a water dropper, and the first external drain pipe is connected to the water dropper through a side-entry rainwater hopper.

[0017] According to the present invention, a roof double waterproofing and double drainage system is provided, wherein the second waterproof layer includes an upper waterproof sub-layer and a lower waterproof sub-layer, and the upper waterproof sub-layer and the lower waterproof sub-layer are staggered and overlapped with each other.

[0018] According to the present invention, a roof double-proof and double-drainage system further includes a vent pipe, which is arranged vertically. The lower end of the vent pipe is connected to the drainage and exhaust pipe network, and the upper end of the vent pipe extends upward and passes through the leveling layer, the second waterproof layer and the protective layer in sequence before connecting to the external space.

[0019] According to the present invention, a roof double-proof and double-drainage system is provided, wherein multiple air inlets are opened on the pipe wall of the exhaust pipe near the end of the drainage and exhaust pipe network, and the multiple air inlets are arranged corresponding to the insulation layer.

[0020] According to the present invention, a roof double waterproofing and double drainage system is provided, wherein the second waterproof layer is laid at a position corresponding to the vent pipe and extends upward along the periphery of the vent pipe, and a protective layer is laid on the outer side of the upward extension section of the second waterproof layer along the periphery of the vent pipe.

[0021] According to the present invention, a roof double waterproofing and double drainage system is provided, wherein the second waterproof layer has a sealing ring between the upper port of the second waterproof layer at the position corresponding to the vent pipe and the outer wall of the vent pipe.

[0022] This utility model provides a double-drainage roof system with dual waterproofing and drainage. By installing a dual drainage system on the parapet wall, the roof's drainage capacity is significantly enhanced. In the face of heavy rainfall and other severe weather, it can quickly drain rainwater from the roof, reducing the occurrence of localized water accumulation and effectively lowering the risk of damage to the roof's waterproofing and structural layers, thus extending the roof's service life. Furthermore, the newly added drainage pipes can promptly drain water leaking from the waterproofing layer above the insulation layer, preventing long-term erosion of the waterproofing layer and further improving the roof's waterproofing performance. Simultaneously, the combined upright and inverted waterproofing design, with a first and second waterproofing layer installed above and below the insulation layer respectively, forms multiple lines of defense. This design effectively blocks the penetration of rainwater and moisture into the roof, greatly reducing the possibility of waterproofing layer leakage and providing a more reliable waterproofing guarantee for the roof, thus improving the building's waterproofing quality. Attached Figure Description

[0023] To more clearly illustrate the technical solutions in 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 some embodiments of this utility model. For those skilled in the art, other drawings can be obtained from these drawings without creative effort.

[0024] Figure 1 This is a structural schematic diagram of the roof double-proof and double-drainage system provided by this utility model.

[0025] Figure 2 This is a schematic diagram showing the connection between the drain pipe and the first external drain pipe provided by this utility model.

[0026] Figure 3 This is one of the connection diagrams of the exhaust pipe and the drainage and exhaust pipe network provided by this utility model.

[0027] Figure 4 This is the second schematic diagram of the connection between the exhaust pipe and the drainage and exhaust pipe network provided by this utility model.

[0028] Figure 5 This is a plan view of the drainage and exhaust pipe network provided by this utility model.

[0029] Figure label:

[0030] 1. Roof double-proof and double-drainage system;

[0031] 10. Roof structure; 20. Parapet wall; 21. First drainage outlet; 22. Second drainage outlet; 30. Slope-forming layer; 40. First waterproof layer; 50. Insulation layer; 51. Drainage and ventilation pipe network; 511. Connecting hole; 60. Leveling layer; 70. Second waterproof layer; 71. Upper waterproof sub-layer; 72. Lower waterproof sub-layer; 80. Protective layer; 90. First external drainage pipe; 91. Side-entry rainwater hopper; 100. Second external drainage pipe; 110. Drain pipe; 111. Downflow hopper; 120. Exhaust pipe; 121. Air inlet; 130. Sealing ring layer. Detailed Implementation

[0032] The embodiments of this utility model will be described in further detail below with reference to the accompanying drawings and examples. The following examples are for illustrative purposes only and should not be construed as limiting the scope of this utility model.

[0033] In the description of the embodiments of this utility model, it should be noted that the terms "center," "longitudinal," "lateral," "upper," "lower," "front," "rear," "left," "right," "vertical," "horizontal," "top," "bottom," "inner," and "outer," etc., indicating the orientation or positional relationship, are based on the orientation or positional relationship shown in the accompanying drawings. They are only for the convenience of describing the embodiments of this utility model 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, they should not be construed as limitations on the embodiments of this utility model. In addition, the terms "first," "second," and "third" are used for descriptive purposes only and should not be construed as indicating or implying relative importance.

[0034] In the description of the embodiments of this utility model, it should be noted that, unless otherwise explicitly specified and limited, the terms "connected" and "linked" should be interpreted broadly. For example, they can refer to a fixed connection, a detachable connection, or an integral connection; they can refer to a mechanical connection or an electrical connection; they can refer to a direct connection or an indirect connection through an intermediate medium. Those skilled in the art can understand the specific meaning of the above terms in the embodiments of this utility model based on the specific circumstances.

[0035] In this embodiment of the utility model, unless otherwise explicitly specified and limited, "above" or "below" the second feature can mean that the first feature is in direct contact with the second feature, or that the first feature is in indirect contact with the second feature through an intermediate medium. Furthermore, "above," "on top of," and "over" the second feature can mean that the first feature is directly above or diagonally above the second feature, or simply that the first feature is at a higher horizontal level than the second feature. "Below," "below," and "under" the second feature can mean that the first feature is directly below or diagonally below the second feature, or simply that the first feature is at a lower horizontal level than the second feature.

[0036] In the description of this specification, the references to terms such as "one embodiment," "some embodiments," "example," "specific example," or "some examples," etc., refer to specific features, structures, materials, or characteristics described in connection with that embodiment or example, which are included in at least one embodiment or example of the present invention. In this specification, the illustrative expressions of the above terms do not necessarily refer to the same embodiment or example. Furthermore, the specific features, structures, materials, or characteristics described may be combined in any suitable manner in one or more embodiments or examples. Moreover, without contradiction, those skilled in the art can combine and integrate the different embodiments or examples described in this specification, as well as the features of different embodiments or examples.

[0037] The following is combined Figures 1 to 5 The roof double-proof and double-drainage system provided by the present invention will be described in detail through specific embodiments and application scenarios.

[0038] In the embodiments of this utility model, such as Figures 1 to 4As shown, a roof double-waterproofing and double-drainage system 1 includes a roof structure 10, a parapet wall 20, a slope-forming layer 30, a first waterproof layer 40, a thermal insulation layer 50, a leveling layer 60, a second waterproof layer 70, and a protective layer 80. The parapet wall 20 is vertically fixed to the outer perimeter of the roof structure 10. The parapet wall 20 has a first drainage outlet 21 and a second drainage outlet 22 arranged sequentially from bottom to top, and the first and second drainage outlets 21 and 22 are connected to an external drainage system. The slope-forming layer 30 is located on the upper surface of the roof structure 10. The first waterproof layer 40 is located on the side of the slope-forming layer 30 away from the roof structure 10. The thermal insulation layer 50 is located on the first waterproof layer. On the side of the insulation layer 50 away from the slope-finding layer 30, a drainage and venting pipe network 51 is arranged inside the insulation layer 50. The pipe wall of the drainage and venting pipe network 51 is provided with multiple connecting holes 511 that communicate with the insulation layer 50. The drainage and venting pipe network 51 extends to the parapet wall 20 and communicates with the first drainage outlet 21 on the parapet wall 20. The leveling layer 60 is located on the side of the insulation layer 50 away from the first waterproof layer 40. The second waterproof layer 70 is located on the side of the leveling layer 60 away from the insulation layer 50. The protective layer 80 is located on the side of the second waterproof layer 70 away from the leveling layer 60. The side of the protective layer 80 away from the second waterproof layer 70 is connected to the second drainage outlet 22.

[0039] The roof structure 10 is the load-bearing foundation of the entire roof system, providing support for the other layers. It has sufficient strength and stability to withstand the roof's own weight, construction loads, and various external forces during use (such as wind loads, snow loads, etc.).

[0040] The parapet wall 20 is vertically fixed to the outer perimeter of the roof structure 10, mainly serving as an enclosure and safety protection. It prevents rainwater from directly washing over the wall at the roof edge and provides an installation location for the drainage system.

[0041] The parapet wall 20 is provided with a first drainage outlet 21 and a second drainage outlet 22 arranged sequentially from bottom to top. These two drainage outlets are connected to the drainage and ventilation pipe network 51 and the roof drainage system, respectively, to ensure that rainwater and water vapor in the insulation layer 50 can be discharged smoothly.

[0042] The slope-forming layer 30 is located on the upper surface of the roof structure 10. Its main function is to create a drainage slope, ensuring that rainwater can flow smoothly to the drainage outlet. The slope-forming layer 30 is usually made of lightweight materials with good thermal insulation properties (such as expanded clay concrete), which can meet drainage requirements and provide a certain degree of thermal insulation.

[0043] The first waterproof layer 40 is located on the side of the slope-forming layer 30 away from the roof structure 10, and is the first line of defense for roof waterproofing. It can effectively block rainwater penetration and prevent moisture from entering the roof structure 10. The first waterproof layer 40 is usually made of modified bitumen waterproof membrane or polymer waterproof membrane, which has good waterproof performance and durability.

[0044] The thermal insulation layer 50 is located on the side of the first waterproof layer 40 away from the slope-forming layer 30. It is mainly used to maintain the thermal insulation performance of the roof, reduce heat transfer, improve indoor comfort, and reduce energy consumption. The thermal insulation layer 50 is usually made of polystyrene foam board (EPS), extruded polystyrene foam board (XPS), or polyurethane foam board.

[0045] A drainage and venting pipe network 51 is installed inside the insulation layer 50, and multiple connecting holes 511 are provided on the pipe walls to communicate with the insulation layer 50. These connecting holes 511 can promptly drain accumulated water and moisture from the insulation layer 50, preventing the insulation layer 50 from getting damp and ensuring stable insulation performance. The drainage and venting pipe network 51 extends to the parapet wall 20 and connects to the first drain outlet 21, directing the discharged moisture and accumulated water into the external drainage system.

[0046] The leveling layer 60 is located on the side of the insulation layer 50 away from the first waterproof layer 40. Its main function is to provide a smooth construction surface for the second waterproof layer 70. The leveling layer 60 is usually made of 20mm thick cement mortar. During construction, it is necessary to ensure that the surface is flat and smooth, without defects such as sand or hollow areas.

[0047] The second waterproof layer 70 is located on the side of the leveling layer 60 away from the insulation layer 50, serving as the second line of defense for roof waterproofing. It further enhances the roof's waterproofing performance, effectively preventing the penetration of rainwater and moisture. The second waterproof layer 70 typically uses a polymer waterproof membrane. During construction, care should be taken to ensure that the overlaps between the upper and lower waterproof layers are staggered to avoid continuous seams.

[0048] The protective layer 80 is located on the side of the second waterproof layer 70 away from the leveling layer 60. Its main function is to protect the waterproof layer from external environmental influences (such as ultraviolet rays, mechanical damage, etc.). The protective layer 80 is usually made of materials such as fine aggregate concrete or cement mortar, and its strength must be ensured to meet the design requirements during construction.

[0049] The protective layer 80 is connected to the second drain outlet 22 on the side opposite to the second waterproof layer 70 to ensure that rainwater on the roof can be discharged smoothly and further optimize the drainage effect.

[0050] This application significantly enhances roof drainage capacity by installing a dual drainage system on the parapet wall 20. In the face of severe weather such as heavy rainfall, it can quickly drain rainwater from the roof, reducing the occurrence of localized water accumulation and effectively lowering the risk of damage to the roof's waterproofing and structural layers, thus extending the roof's service life. Furthermore, the newly added drainage pipes can promptly drain water leaking from the waterproofing layer on the insulation layer 50, preventing long-term erosion of the waterproofing layer and further improving the roof's waterproofing performance. Simultaneously, a combined upright and inverted waterproofing design is adopted, with a first waterproofing layer 40 and a second waterproofing layer 70 installed above and below the insulation layer 50, forming multiple lines of defense. This design effectively blocks the penetration of rainwater and moisture into the roof, greatly reducing the possibility of waterproofing layer leakage, providing more reliable waterproofing protection for the roof, and improving the building's waterproofing quality.

[0051] Reference Figure 5 According to the present invention, a roof double-proof and double-drainage system 1 is provided, wherein the drainage and exhaust pipe network 51 is arranged in a manner that coincides with the dividing joint of the leveling layer 60.

[0052] Understandably, the expansion joints in the leveling layer 60 are typically designed to prevent cracks from forming due to temperature changes or shrinkage. They are usually located in low-lying areas of the roof or along the drainage direction. Aligning the drainage and ventilation pipe network 51 with the expansion joints of the leveling layer 60 makes the drainage path clearer and more defined. This allows water and moisture within the insulation layer 50 to flow directly to the drainage pipe network along the expansion joints, reducing the time water remains within the insulation layer 50 and improving drainage efficiency.

[0053] Secondly, the expansion joint itself has a certain drainage function. The drainage and ventilation pipe network 51 is arranged along the expansion joint, which can effectively utilize the drainage channel of the expansion joint to guide the water and water vapor in the insulation layer 50 to flow along a predetermined path and finally be discharged from the roof through the drainage pipe network. In this way, the accumulation of water in the insulation layer 50 is reduced, and the performance degradation of the insulation layer 50 caused by water accumulation is avoided.

[0054] In some embodiments, the slope of the drainage and venting network 51 is consistent with the slope of the roof drainage.

[0055] Understandably, the roof drainage slope is designed based on the roof structure and drainage requirements to ensure that rainwater can flow quickly and smoothly to the drain outlet. The slope of the drainage and venting pipe network 51 is consistent with the roof drainage slope, meaning that the water flow direction within the network is the same as the rainwater flow direction on the roof, effectively preventing water accumulation within the network. Simultaneously, the consistent slope design ensures that accumulated water within the drainage and venting pipe network 51 can be discharged quickly, reducing the time water accumulates within the network. This effectively prevents long-term erosion of the insulation layer 50 and waterproofing layer by accumulated water, especially in environments with heavy rainfall or prolonged dampness.

[0056] Reference Figure 1 According to the present invention, a roof double-proof and double-drainage system 1 is provided, which further includes a first external drainage pipe 90, a second external drainage pipe 100, and a drain pipe 110. The drain pipe 110 is vertically arranged on the outside of the parapet wall 20. The first external drainage pipe 90 passes through the first drainage outlet 21 and is connected between the drainage and venting pipe network 51 and the drain pipe 110. The second external drainage pipe 100 passes through the second drainage outlet 22 and is connected between the upper space of the protective layer 80 and the drain pipe 110.

[0057] Understandably, the drain pipe 110 is vertically arranged on the outside of the parapet wall 20, and its main function is to guide rainwater and accumulated water discharged from the roof directly to the ground or other drainage systems. The vertical arrangement can effectively reduce the residence time of rainwater at the edge of the roof and prevent rainwater from flowing back or seeping into the roof structure 10.

[0058] The first external drainage pipe 90 passes through the first drainage outlet 21 and connects the drainage and venting network 51 and the drain pipe 110. The first external drainage pipe 90 serves as the connecting channel between the drainage and venting network 51 and the drain pipe 110, ensuring the continuity and integrity of the entire drainage system. This allows moisture and accumulated water within the insulation layer 50 to enter the first external drainage pipe 90 through the drainage and venting network 51 and ultimately be discharged from the roof through the drain pipe 110.

[0059] The second external drainage pipe 100 is installed on the second drainage outlet 22 and connects the upper space of the protective layer 80 and the drain pipe 110. The second external drainage pipe 100 connects the upper space of the protective layer 80 with the drain pipe 110, which can promptly drain the accumulated water from the roof, prevent the water from seeping into the interior of the protective layer 80 or causing damage to other roof structures, and ensure the dryness and stability of the roof.

[0060] The second external drainage pipe 100 and the first external drainage pipe 90 work together to form the drainage system of the roof double-proof and double-drainage system 1. The first external drainage pipe 90 is mainly responsible for draining water vapor and accumulated water inside the insulation layer 50, while the second external drainage pipe 100 is responsible for draining accumulated water in the space above the protective layer 80. The clear division of labor between the two ensures that water accumulated in all parts of the roof can be drained in a timely and effective manner, improving the reliability and comprehensiveness of the roof drainage system.

[0061] Reference Figure 1 and Figure 2According to the present invention, a roof double-proof and double-drainage system 1 is provided, wherein the upper end of the drain pipe 110 is provided with a water dropper 111, and the first external drain pipe 90 is aligned and connected to the water dropper 111 through a side-entry rainwater hopper 91.

[0062] Understandably, the rainwater hopper 111 has a large water collection area and a reasonable shape design, which can effectively collect rainwater flowing down from the roof. During rainfall, rainwater will collect at the rainwater hopper 111 along the roof slope. The rainwater hopper 111 can prevent rainwater from scattering around the upper port of the drain pipe 110, ensuring that most of the rainwater can smoothly enter the drain pipe 110, improving rainwater collection efficiency and reducing the possibility of local water accumulation on the roof.

[0063] The side-entry rainwater hopper 91 design allows the first external drain pipe 90 to connect to the downspout 111 laterally. This better adapts to the roof structure and drainage layout, reduces the space occupied on the roof, and allows water to flow more smoothly from the first external drain pipe 90 into the downspout 111, avoiding turbulence or backflow during the connection process and improving drainage efficiency.

[0064] Reference Figure 1 , Figure 3 and Figure 4 According to the present invention, a roof double waterproofing and double drainage system 1 is provided, wherein the second waterproof layer 70 includes an upper waterproof sub-layer 71 and a lower waterproof sub-layer 72, which are staggered and overlapped with each other.

[0065] Understandably, the second waterproof layer 70 consists of an upper waterproof sub-layer 71 and a lower waterproof sub-layer 72, and the double-layer structure provides additional waterproof protection. Even if one waterproof layer develops minor cracks or leaks, the other layer can still effectively prevent water penetration, significantly improving the overall performance of the waterproof layer.

[0066] The upper waterproof sub-layer 71 and the lower waterproof sub-layer 72 overlap in a staggered manner, meaning the overlap seams of the two waterproof layers are not in the same location. This effectively avoids the risk of leakage caused by misaligned overlap seams and further enhances the sealing performance of the waterproof layer.

[0067] Reference Figure 1 , Figure 3 and Figure 4 According to the present invention, a roof double waterproof and double drainage system 1 is provided, which also includes a vent pipe 120. The vent pipe 120 is arranged vertically. The lower end of the vent pipe 120 is connected to the drainage and exhaust pipe network 51. The upper end of the vent pipe 120 extends upward and passes through the leveling layer 60, the second waterproof layer 70 and the protective layer 80 in sequence before connecting with the external space.

[0068] Understandably, the main function of the vent pipe 120 is to expel moisture from the insulation layer 50. The lower end of the vent pipe 120 connects to the drainage and ventilation network 51, which itself collects and discharges rainwater from the roof and regulates the roof's gas pressure. The vent pipe 120 and the drainage and ventilation network 51 together form a complete gas flow system. Inside the roof, moisture can enter the drainage and ventilation network 51 through the vent pipe 120, and then be discharged to a suitable location by the drainage and ventilation network 51, achieving efficient moisture discharge from the roof. This fully utilizes the overall function of the drainage and ventilation network 51 and improves the efficiency of roof drainage and ventilation.

[0069] Reference Figure 1 , Figure 3 and Figure 4 According to the present invention, a roof double-proof and double-drainage system 1 is provided, wherein multiple air inlets 121 are opened on the pipe wall of the exhaust pipe 120 near the drainage and exhaust pipe network 51, and the multiple air inlets 121 are set corresponding to the insulation layer 50.

[0070] Understandably, the multiple air inlets 121 between the exhaust pipe 120 and the insulation layer 50 create multiple airflow channels. When moisture is present inside the roof, it will enter the exhaust pipe 120 through these channels via the air inlets 121. Compared to a single air inlet, multiple air inlets 121 increase the path and area for moisture to enter the exhaust pipe 120, allowing it to be discharged more quickly and smoothly. This effectively reduces the humidity of the insulation layer 50, maintains its dryness, and ensures its insulation performance.

[0071] Reference Figure 1 , Figure 3 and Figure 4 According to the present invention, a roof double waterproofing and double drainage system 1 is provided, wherein the second waterproof layer 70 is laid at a position corresponding to the vent pipe 120 and extends upward along the periphery of the vent pipe 120, and a protective layer 80 is laid on the outer side of the upward extension section of the second waterproof layer 70 along the periphery of the vent pipe 120.

[0072] Understandably, the second waterproof layer 70 extends upwards along the perimeter of the vent pipe 120, ensuring the continuity of the waterproof layer around the vent pipe 120. This effectively prevents moisture and rainwater from seeping into the roof structure 10 through the gaps between the vent pipe 120 and the waterproof layer, thereby enhancing the waterproof performance of the entire roof system. Furthermore, the extended section of the second waterproof layer 70 not only covers the perimeter of the vent pipe 120 but also forms double protection through the protective layer 80. This further reduces the possibility of leakage and improves the reliability of the waterproof layer.

[0073] Reference Figure 1 , Figure 3 and Figure 4 According to the present invention, a roof double waterproofing and double drainage system 1 is provided, wherein the second waterproof layer 70 has a sealing ring layer 130 between its upper port corresponding to the vent pipe 120 and the outer wall surface of the vent pipe 120.

[0074] Understandably, the main function of the sealing ring 130 is to prevent moisture and rainwater from seeping into the roof structure 10 through the gap between the second waterproof layer 70 and the vent pipe 120. By setting the sealing ring 130 between the upper end of the second waterproof layer 70 and the outer wall of the vent pipe 120, any possible tiny gaps can be effectively blocked, ensuring the sealing performance of the waterproof layer.

[0075] Finally, it should be noted that the above embodiments are only used to illustrate the technical solutions of this utility model, and not to limit it. Although this utility model has been described in detail with reference to the foregoing embodiments, those skilled in the art should understand that modifications can still be made to the technical solutions described in the foregoing embodiments, or equivalent substitutions can be made to some of the technical features. Such modifications or substitutions do not cause the essence of the corresponding technical solutions to deviate from the spirit and scope of the technical solutions of the embodiments of this utility model.

Claims

1. A roof double-proof and double-drainage system, characterized in that, include: Roof structure; The parapet wall is vertically fixed to the outer perimeter of the roof structure. The parapet wall is provided with a first drainage outlet and a second drainage outlet arranged sequentially from bottom to top. The first drainage outlet and the second drainage outlet are connected to the external drainage system. A slope-finding layer is provided on the upper surface of the roof structure; The first waterproof layer is located on the side of the slope-finding layer that is away from the roof structure. The insulation layer is located on the side of the first waterproof layer away from the slope layer. A drainage and venting pipe network is arranged inside the insulation layer. The pipe wall of the drainage and venting pipe network is provided with a plurality of connecting holes that communicate with the insulation layer. The drainage and venting pipe network extends to the parapet wall and communicates with the first drainage outlet on the parapet wall. A leveling layer is provided on the side of the insulation layer that is away from the first waterproof layer; The second waterproof layer is located on the side of the leveling layer that is away from the insulation layer. A protective layer is provided on the side of the second waterproof layer away from the leveling layer, and the side of the protective layer away from the second waterproof layer is connected to the second drain outlet.

2. The roof double-proof and double-drainage system according to claim 1, characterized in that, The layout of the drainage and ventilation pipe network coincides with the division joints of the leveling layer.

3. The roof double-proof and double-drainage system according to claim 1, characterized in that, The slope of the drainage and venting pipe network is consistent with the slope of the roof drainage.

4. The roof double-proof and double-drainage system according to claim 1, characterized in that, It also includes a first external drainage pipe, a second external drainage pipe, and a drain pipe, wherein the drain pipe is vertically arranged on the outside of the parapet wall; the first external drainage pipe passes through the first drainage outlet and is connected between the drainage and venting pipe network and the drain pipe; the second external drainage pipe passes through the second drainage outlet and is connected between the upper space of the protective layer and the drain pipe.

5. The roof double-proof and double-drainage system according to claim 4, characterized in that, The upper end of the drain pipe is equipped with a water dropper, and the first external drain pipe is connected to the water dropper through a side-entry rainwater hopper.

6. The roof double-proof and double-drainage system according to claim 1, characterized in that, The second waterproof layer includes an upper waterproof sublayer and a lower waterproof sublayer, which are staggered and overlapped with each other.

7. The roof double-proof and double-drainage system according to any one of claims 1-6, characterized in that, It also includes a vent pipe, which is arranged vertically. The lower end of the vent pipe is connected to the drainage and exhaust pipe network, and the upper end of the vent pipe extends upward and passes through the leveling layer, the second waterproof layer and the protective layer in sequence before connecting to the external space.

8. The roof double-proof and double-drainage system according to claim 7, characterized in that, Multiple air inlets are formed on the pipe wall at one end of the exhaust pipe near the drainage and exhaust pipe network, and the multiple air inlets are arranged corresponding to the insulation layer.

9. The roof double-proof and double-drainage system according to claim 7, characterized in that, The second waterproof layer is laid at a position corresponding to the vent pipe and extends upward along the periphery of the vent pipe, and a protective layer is laid on the outer side of the upward extension section of the second waterproof layer along the periphery of the vent pipe.

10. The roof double-proof and double-drainage system according to claim 9, characterized in that, The second waterproof layer has a sealing ring between its upper end, which is located at a position corresponding to the exhaust pipe, and the outer wall surface of the exhaust pipe.

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