Double-guide drainage structure for external drainage of roof
By incorporating a dual-guided drainage structure, including horizontal and vertical drainage pipes, the problem of water accumulation inside the roof that cannot be drained in a timely manner is solved, enabling rapid drainage of accumulated water and improving waterproofing performance and service life.
Patent Information
- Authority / Receiving Office
- CN · China
- Patent Type
- Utility models(China)
- Current Assignee / Owner
- Filing Date
- 2025-04-21
- Publication Date
- 2026-03-24
AI Technical Summary
Water accumulation in the roof structure that cannot be drained in time leads to structural damage and mold growth. Existing technologies are insufficient to effectively solve the problem of water accumulation inside the roof.
The system employs a dual-guided drainage structure, including a horizontal main drain pipe and a vertical external drain pipe, combined with horizontal and vertical drainage branch pipes. PVC pipe assemblies are used, and protective floor drains are installed to ensure that accumulated water is quickly drained from the roof structure.
It enables rapid drainage of water accumulated in the protective surface layer and interior of the roof structure, improving waterproofing performance and service life, and preventing structural damage and mold growth.
Smart Images
Figure CN224032025U_ABST
Abstract
Description
TECHNICAL FIELD
[0001] The application relates to the technical field of house construction, in particular to a double-guide drainage structure for roof external drainage. BACKGROUND
[0002] The design of a roof drainage structure is directly related to the waterproof performance and service life of a building, and the core lies in the combination of rapid drainage and anti-seepage through reasonable structural design. However, the drainage structure of a general roof mainly effectively removes the accumulated water on the protective layer of the roof, and the general way of roof drainage is that the rainwater on the roof flows through the eaves gutter, downspout and drain pipe, and is quickly drained away, thereby reducing the burden of the waterproof layer or hydrophobic insulation board, so as to avoid seepage. However, when the following situations exist, there is a risk of accumulated water in the roof interior: (1) wet work water on the roof leads to accumulated water in the roof interior, such as accumulated water caused by watering the wet base before concrete pouring; (2) rainwater and construction and maintenance water enter the roof structure interior due to postpositioned waterproof construction; (3) rainwater seepage occurs due to damage of the roof waterproof layer after long-term use, leading to accumulated water in the roof. Once the water flow enters the roof interior without being timely treated, not only the roof structure will be damaged (for example, in winter, the accumulated water will be expanded in volume after freezing, leading to frost damage of the roof structure), but also mold and algae may be bred, affecting the appearance of the building. CONTENT OF THE UTILITY MODEL
[0003] The application provides a double-guide drainage structure for roof external drainage, which not only effectively removes the accumulated water above the protective layer in the roof structure, but also effectively removes the accumulated water in the roof structure interior when there is accumulated water in the roof structure interior.
[0004] The above object of the application is achieved by the following technical scheme:
[0005] A double-guide drainage structure for roof external drainage comprises a first double-guide water component arranged at the junction of a roof structure and a parapet wall, which not only removes the accumulated water on the protective surface layer in the roof structure, but also removes the accumulated water in the roof structure interior.
[0006] The first double-guide water component comprises a horizontal main drainage pipe, which is installed through the parapet wall in the horizontal direction, and the inner wall of the lower side of the horizontal main drainage pipe is flush with the protective surface layer in the roof structure.
[0007] A horizontal drainage branch pipe is arranged in parallel below the horizontal main drainage pipe, and the horizontal drainage branch pipe is installed through the parapet wall at the corresponding position, and the lower side inner wall of the horizontal drainage branch pipe at the inner side of the parapet wall is aligned with the lower bottom of the insulation layer in the roof structure.
[0008] The horizontal drainage branch pipe and the horizontal main drainage pipe are fixedly connected with a vertical outer drainage pipe at one end outside the parapet wall.
[0009] Further, the waterproof layer in the roof structure has a slope of 2% towards the port of the horizontal main drainage pipe at the inner side of the parapet wall.
[0010] Further, a supplementary waterproof layer is additionally arranged between the thermal insulation layer in the roof structure and the concrete roof panel.
[0011] Further, a second double water guide assembly is arranged in the vertical direction on the roof structure, which can simultaneously drain the water on the protective layer in the roof structure and the water inside the roof structure.
[0012] Further, the second double water guide assembly comprises a vertical water pipe penetrating through the roof structure in the vertical direction, the lower end of the vertical water pipe is connected with an indoor drainage pipe of the building, a water stop is arranged on the pipe body of the vertical water pipe below the thermal insulation layer in the roof structure, and the upper end of the vertical water pipe is flush with the protective layer.
[0013] Further, a protective floor drain is arranged at the water inlet port of the horizontal main drainage pipe and the vertical water pipe.
[0014] Further, the materials of the components in the first double water guide assembly and the second double water guide assembly are PVC.
[0015] In summary, the present application has at least one of the following beneficial technical effects:
[0016] When there is water on the protective layer in the roof structure, the horizontal main drainage pipe of the present application can quickly guide the water to the vertical outer drainage pipe, achieving the effect of draining the water above the protective layer. The horizontal drainage branch pipe is additionally arranged at the position corresponding to the thermal insulation layer in the roof structure on the parapet wall, and when there is unexpected water inside the roof structure, the horizontal drainage branch pipe can drain the water through the vertical outer drainage pipe from the thermal insulation layer at the lowermost part of the roof structure. Compared with the prior art, the double water guide drainage structure of the present application can not only drain the water above the protective layer in the roof structure, but also drain the water inside the roof structure, effectively solving the problem that the water inside the roof structure cannot be drained in time. BRIEF DESCRIPTION OF DRAWINGS
[0017] In order to more clearly illustrate the technical solutions in the embodiments of the present application or the prior art, the following will briefly introduce the drawings needed to be used in the embodiments or prior art description. Obviously, the drawings in the following description are some embodiments of the present application, and other drawings can be obtained by those skilled in the art without any creative effort based on these drawings.
[0018] Figure 1 is a schematic diagram of the overall structure of the present application;
[0019] Figure 2 is a schematic diagram of the structure of the second double water guide assembly of the present application.
[0020] The drawings are as follows: 1, roof structure; 101, protective surface layer; 102, thermal insulation layer; 103, waterproof layer; 104, supplementary waterproof layer; 2, parapet wall; 3, first double water guide assembly; 31, horizontal main drain pipe; 32, horizontal drain branch pipe; 33, vertical outer drain pipe; 4, second double water guide assembly; 41, vertical water pipe; 42, water stop; 5, protective floor drain; 6, concrete roof panel. DETAILED DESCRIPTION
[0021] In order to make the purpose, technical solutions and advantages of the embodiments of the present application more clear, the technical solutions in the embodiments of the present application will be described clearly and completely below. Obviously, the described embodiments are some embodiments of the present application, but not all the embodiments. Based on the embodiments in the present application, all other embodiments obtained by those skilled in the art without any creative effort also belong to the scope of protection of the present application.
[0022] As shown in Figure 1 , a double guide drainage structure for roof outer drainage disclosed by the present application comprises a first double water guide assembly 3 arranged at the junction of a roof structure 1 and a parapet wall 2. The first double water guide assembly 3 can not only drain the accumulated water on the protective surface layer 101 of the roof structure 1, but also drain the accumulated water in the roof structure 1.
[0023] The first double water guide assembly 3 comprises a horizontal main drain pipe 31, which is installed through the parapet wall 2 in the horizontal direction, and the inner wall of the lower side of the horizontal main drain pipe 31 is flush with the protective surface layer 101 in the roof structure 1.
[0024] A horizontal drain branch pipe 32 is arranged in parallel below the horizontal main drain pipe 31, and the horizontal drain branch pipe 32 is installed through the parapet wall 2 at the corresponding position. The lower side inner wall of the horizontal drain branch pipe 32 at the inner side of the parapet wall 2 is aligned with the lower bottom of the thermal insulation layer 102 in the roof structure 1.
[0025] The horizontal drainage branch pipe 32 and the horizontal main drainage pipe 31 are fixedly connected with a vertical outer drainage pipe 33 at one end outside the parapet wall 2.
[0026] In the above embodiment, the existing roof structure 1 is roughly as follows: a thermal insulation layer 102 is laid on the concrete roof panel 6, a concrete leveling layer is arranged above the thermal insulation layer 102, a waterproof layer 103 is fully laid on the concrete leveling layer, and finally a protective surface layer 101 is applied on the waterproof layer 103. The parapet wall 2 is a special name commonly used in house building, which refers to the low wall around the roof of the building.
[0027] The horizontal main drainage pipe 31 of the present application is installed at the root of the parapet wall 2, one end of the horizontal main drainage pipe 31 is located inside the parapet wall 2, and the lower side of the end of the horizontal main drainage pipe 31 is flush with the protective surface layer 101 in the roof structure 1. In this way, when water accumulates on the roof top, the horizontal main drainage pipe 31 can provide an outlet for the water accumulated on the protective surface layer 101, guiding the water on the protective surface layer 101 to the outside of the parapet wall 2. Since the end of the horizontal main drainage pipe 31 located outside the parapet wall 2 is connected with the vertical outer drainage pipe 33, the water on the protective surface layer 101 will be further transported away along the vertical outer drainage pipe 33 after being guided by the horizontal main drainage pipe 31 to the outside of the parapet wall 2, so that the horizontal main drainage pipe 31 can ensure continuous and efficient drainage of water accumulated above the protective surface layer 101. When water accumulates inside the roof structure 1 due to damage to the waterproof layer 103 or other special reasons, the horizontal drainage branch pipe 32 arranged below the horizontal main drainage pipe 31 of the present application is directly opposite the thermal insulation layer 102 located at the bottom of the roof structure 1, so that the water accumulated inside the roof structure 1 can be timely drained to the outside of the parapet wall 2 through the horizontal drainage branch pipe 32. The end of the horizontal drainage branch pipe 32 of the present application located outside the parapet wall 2 is also connected with the vertical outer drainage pipe 33, so that the water accumulated inside the roof structure 1 can also be continuously transported away from the vertical outer drainage pipe 33, to ensure that the horizontal drainage branch pipe 32 has good drainage effect on the inside of the roof structure 1 at all times.
[0028] Compared with the prior art, the double-directional drainage structure of the present application not only can drain the water accumulated above the protective surface layer 101 of the roof structure 1, but also can drain the water accumulated inside the roof structure 1, thereby effectively solving the problem that the water accumulated inside the roof structure 1 cannot be drained in time.
[0029] Further, as shown in Figure 1 the protective surface layer 101 of the roof structure 1 has a slope of 2% towards the direction of the port of the horizontal main drainage pipe 31 located inside the parapet wall 2.
[0030] In the above embodiment, when the leveling layer under the waterproof layer 103 is applied, the upper surface thereof can be treated as a slope surface with a 2% inclination towards the horizontal main drain pipe 31. After the waterproof layer 103 is closely laid on the leveling layer, the waterproof layer 103 also presents a slope surface with a 2% inclination towards the horizontal main drain pipe 31. When the protective surface layer 101 is poured on the waterproof layer 103, as long as the depth from the upper end surface of the protective surface layer 101 to the upper surface of the waterproof layer 103 is controlled, the protective surface layer 101 also presents a slope surface with a 2% inclination towards the horizontal main drain pipe 31. In the actual layout of the horizontal main drain pipe 31, the inner wall of the end of the horizontal main drain pipe 31 located inside the parapet wall 2 can be set to be not higher than the upper surface of the waterproof layer 103. In this way, whether it is the accumulated water on the protective surface layer 101 or the accumulated water between the waterproof layer 103 and the protective surface layer 101, the water can automatically flow into the horizontal main drain pipe 31 under the action of gravity and be smoothly drained through the horizontal main drain pipe 31. The horizontal main drain pipe 31 is laid with waterproof material at the joint of the water inlet port (located at the end inside the parapet wall 2) to reduce the risk of leakage of water flow from the water inlet port of the horizontal main drain pipe 31 and the joint of the wall or roof structure 1 structure.
[0031] Further, as shown in Figure 1 , a supplementary waterproof layer 104 is additionally arranged between the thermal insulation layer 102 in the roof structure 1 and the concrete roof panel 6.
[0032] In the above embodiment, when there is accumulated water inside the roof structure 1, the water seeping from the thermal insulation layer 102 will directly contact the concrete roof panel 6 due to the water permeability of the thermal insulation layer 102. If the water further penetrates downward, there will be a risk of water leakage inside the building. Therefore, the supplementary waterproof layer 104 is additionally arranged between the thermal insulation layer 102 and the concrete roof panel 6, which has the same material as the ordinary waterproof layer 103. The supplementary waterproof layer 104 can further improve the waterproof effect of the roof of the building.
[0033] Further, as shown in Figure 1 and Figure 2 , a second double water guide assembly 4 is arranged in the vertical direction on the roof structure 1. The second double water guide assembly 4 can also simultaneously drain the accumulated water on the protective surface layer 101 in the roof structure 1 and the accumulated water inside the roof structure 1.
[0034] In the above embodiment, in addition to the first double water guide assembly 3 arranged at the junction of the roof structure 1 of the building and the parapet wall 2, a second double water guide assembly 4 is additionally arranged on the plane of the roof structure 1. In this way, when a large amount of water flow appears in the large-area roof structure 1, the water flow can be efficiently and timely drained through multiple channels.
[0035] Further, as shown in Figure 1 and Figure 2 The second double water guide assembly 4 includes a vertical water pipe 41 extending through the entire roof structure 1 in the vertical direction, the lower end of the vertical water pipe 41 is connected with the indoor drainage pipe of the building, a water stop 42 is installed on the pipe body of the vertical water pipe 41 corresponding to the position below the thermal insulation layer 102 in the roof structure 1, and the upper end of the vertical water pipe 41 is flush with the protective surface layer 101.
[0036] In the above embodiment, the vertical water pipe 41 of the present application is fixedly inserted in the roof structure 1, and the lower end thereof extends to the inside of the concrete roof panel 6 and is connected with the drainage pipe system inside the building (such as the toilet drainage system inside the building), the water stop 42 installed on the pipe body of the vertical water pipe 41 corresponding to the position below the thermal insulation layer 102 is a kind of pipe fitting commonly used in the field of building construction, and in the construction of the concrete roof panel 6 of the building, the water stop 42 can be pre-buried in the concrete roof panel 6, wherein the top surface of the water stop 42 can be in contact with the bottom surface of the thermal insulation layer 102, so that the subsequent installation of the vertical water pipe 41 is facilitated, and the water inlet hole arranged in the circumferential direction on the upper end of the water stop 42 can also guide and drain the water inside the roof structure 1 into the vertical water pipe 41 when there is water accumulation inside the roof structure 1. In addition to the first double water guide assembly 3, the vertical water pipe 41 further added to the roof structure 1 of the present application can also have the effect of guiding and draining the water inside the roof structure 1, so that the drainage efficiency inside the roof structure 1 can be further improved. Similarly, since the upper end of the vertical water pipe 41 of the present application is flush with the upper surface of the protective surface layer 101, the vertical water pipe 41 can also assist the first double water guide assembly 3 to guide and drain the water on the protective surface layer 101, thereby improving the drainage efficiency of the water outside the roof structure 1.
[0037] Further, as shown in Figure 1 and Figure 2 The water inlet port of the horizontal main drainage pipe 31 and the vertical water pipe 41 is provided with a protective floor drain 5.
[0038] In the above embodiment, the water inlet port of the horizontal main drain pipe 31 of the application is located inside the parapet wall 2, and the water inlet port of the vertical pipe 41 is flush with the upper surface of the protective surface layer 101. The water inlet ports of the horizontal main drain pipe 31 and the vertical pipe 41 are directly exposed to the external environment, and the accumulated water above the protective surface layer 101 is also directly exposed to the external environment. If the horizontal main drain pipe 31 and the vertical pipe 41 are not protected, it is likely that the accumulated water above the protective surface layer 101 will cause blockage inside these pipes. The application installs a protective floor drain 5 at the water inlet port of the horizontal main drain pipe 31 and the vertical pipe 41, which can intercept the impurities such as fallen leaves in the accumulated water above the protective surface layer 101 before they enter the horizontal main drain pipe 31 and the vertical pipe 41. This can effectively prevent the horizontal main drain pipe 31 and the vertical pipe 41 from being blocked, and subsequent cleaning by workers will be more convenient.
[0039] Further, the materials of the components in the first double water guide assembly 3 and the second double water guide assembly 4 are PVC materials.
[0040] In the above embodiment, the PVC material rainwater pipe is the most widely used rainwater pipe material in building construction. Using this material to manufacture the components in the first double water guide assembly 3 and the second double water guide assembly 4 of the application has the advantages of low price, good toughness, corrosion resistance, and long service life, which can reduce subsequent maintenance costs.
[0041] The implementation principle of the embodiment is as follows: Before the construction of the roof structure 1, the first double water guide assembly 3 and the second double water guide assembly 4 can be laid out according to the design position on the drawing. To prevent building materials and other substances from entering the horizontal main drain pipe 31 and the horizontal drain branch pipe 32 in the first double water guide assembly 3, and the vertical pipe 41 in the second double water guide assembly 4 during subsequent construction, the water inlet ports of these pipes can be temporarily sealed with adhesive tape. Next, the supplementary waterproof layer 104 can be fully laid on the concrete roof panel 6. After the supplementary waterproof layer 104 is applied, the thermal insulation layer 102 can be laid on the supplementary waterproof layer 104. When these parts of the roof structure 1 are laid to the front of the horizontal drain branch pipe 32, the adhesive tape on the horizontal drain branch pipe 32 is removed and the connection between the horizontal drain branch pipe 32 and the thermal insulation layer 102 is sealed with waterproof material. Next, the concrete leveling layer, the waterproof layer 103, and the protective surface layer 101 can be successively applied on the thermal insulation layer 102. After the protective surface layer 101 is solidified, the adhesive tape on the water inlet ports of the horizontal main drain pipe 31 and the vertical pipe 41 can be removed, and the protective floor drain 5 can be installed at the water inlet ports.
[0042] When the roof structure 1 is in normal use, and water accumulates on the protective layer 101, the horizontal main drain pipe 31 and the water inlet port of the vertical water pipe 41 can provide an external drainage channel for the water accumulated on the protective layer 101, and guide the water accumulated on the protective layer 101 to the drainage pipe outside the parapet wall 2 and indoors. When the roof structure 1 has internal water accumulation due to damage to the waterproof layer 103 or other special reasons, the water inlet port of the horizontal drain pipe 32 in the first double water guide assembly 3 and the water inlet hole on the water stop 42 on the vertical water pipe 41 in the second double water guide assembly 4 can also guide the water accumulated from the lowermost thermal insulation layer 102 of the roof structure 1 to exit the roof structure 1. Compared with the prior art, the present application not only can drain the water accumulated above the protective layer 101 in the roof structure 1, but also can drain the internal water accumulation in the roof structure 1, thereby effectively solving the problem that the internal water accumulation in the roof structure 1 cannot be drained in time.
[0043] Finally, it should be noted that the above embodiments are only used to illustrate the technical solutions of the present application, and are not limited thereto; although the present application has been described in detail with reference to the foregoing embodiments, those skilled in the art should understand that they can modify the technical solutions described in the foregoing embodiments, or make equivalent replacement for part or all of the technical features; and these modifications or replacements do not make the essence of the corresponding technical solutions deviate from the scope of the technical solutions of the embodiments of the present application.
Claims
1. A dual-guide drainage structure for roof external drainage, characterized in that: Includes a first double water-guiding component (3) installed at the junction of the roof structure (1) and the parapet wall (2). The first double water-guiding component (3) can not only drain the water accumulated on the protective surface layer (101) in the roof structure (1), but also drain the water accumulated inside the roof structure (1). The first dual water guide assembly (3) includes a horizontal main drain pipe (31), which is installed horizontally through the parapet wall (2), and the inner wall of the lower side of the horizontal main drain pipe (31) is flush with the protective surface layer (101) in the roof structure (1); A horizontal drainage branch pipe (32) is installed parallel to the horizontal main drainage pipe (31) and the horizontal drainage branch pipe (32) is installed through the parapet wall (2) at the corresponding position. The lower inner wall of the horizontal drainage branch pipe (32) located inside the parapet wall (2) is aligned with the bottom of the insulation layer (102) in the roof structure (1). The horizontal drainage branch pipe (32) and the horizontal main drainage pipe (31) are both fixedly connected to a vertical external drainage pipe (33) at one end outside the parapet wall (2).
2. The dual-guide drainage structure for roof external drainage according to claim 1, characterized in that: The protective surface layer (101) in the roof structure (1) has a 2% inclination toward the port of the horizontal main drain pipe (31) located inside the parapet wall (2).
3. The dual-guide drainage structure for roof external drainage according to claim 1, characterized in that: An additional waterproof layer (104) is provided between the insulation layer (102) in the roof structure (1) and the concrete roof panel (6).
4. The dual-guide drainage structure for roof external drainage according to any one of claims 1 to 3, characterized in that: The roof structure (1) is provided with a second double water guide component (4) along the vertical direction. The second double water guide component (4) can also drain the water accumulated on the protective surface layer (101) in the roof structure (1) and the water accumulated inside the roof structure (1) at the same time.
5. The dual-guide drainage structure for roof external drainage according to claim 4, characterized in that: The second dual water guide assembly (4) includes a vertical water pipe (41) that runs vertically through the entire roof structure (1). The lower end of the vertical water pipe (41) is connected to the building's indoor drainage pipe. A water-stop joint (42) is installed on the vertical water pipe (41) below the insulation layer (102) in the roof structure (1). The upper end of the vertical water pipe (41) is flush with the protective surface layer (101).
6. The dual-guide drainage structure for roof external drainage according to claim 5, characterized in that: Protective floor drains (5) are installed at the inlet ports of both the horizontal main drain pipe (31) and the vertical water pipe (41).
7. The dual-guide drainage structure for roof external drainage according to claim 5, characterized in that: The components of the first dual water guide assembly (3) and the second dual water guide assembly (4) are all made of PVC.