Hidden overflow structure for newly added curtain wall of existing building and construction method of hidden overflow structure
By setting up a hidden overflow structure on the roof and curtain walls of existing buildings, and using the drain pipes designed with inclination to achieve hidden discharge of rainwater, the problem of rainwater discharge during building renovation is solved, and rapid drainage, economic rationality and green and low-carbon effects are achieved.
Patent Information
- Application Number
- CN202510407746.2
- Authority / Receiving Office
- CN · China
- Patent Type
- Applications(China)
- Current Assignee / Owner
- Filing Date
- 2025-04-02
- Publication Date
- 2025-05-06
AI Technical Summary
In the renovation project of existing buildings, how to discharge overflow rainwater from the roof of the building is simple and smoothly, taking into account the facade integrity and aesthetics of the newly added panel curtain wall of the building, and comply with the requirements of economic rationality and green and low-carbon.
A hidden overflow structure is adopted, including setting up a water overflow port on the roof wall, reserved installation holes on the curtain wall, and sealed first drain pipe, second drain pipe and connecting pipe. Through the inclination angle of the connecting pipe and the design of the drain pipe, the hidden discharge of rainwater is achieved.
It has achieved rapid discharge of water accumulation on the roof, maintained the facade integrity and aesthetics of the curtain wall, significantly saved the amount of pipes, and achieved the goal of economic rationality and green and low-carbon.
Smart Images
Figure CN119933409A_ABST
Abstract
Description
Technical Field
[0001] The invention relates to the field of building roof drainage, and in particular to a hidden overflow structure for newly adding curtain walls to existing buildings and a construction method thereof. Background Art
[0002] In recent years, the frequency and intensity of extreme precipitation have increased significantly, which has brought tremendous pressure to the roof of the building and its drainage system. Therefore, it is very important to set up overflow outlets on the roof parapet as emergency drainage facilities to control the amount of water accumulated on the roof. In addition, in the renovation of existing buildings, the renovation and renovation of the facades are often mainly based on the addition of panel curtain walls (stone curtain walls, aluminum curtain walls, ceramic curtain walls, etc.), but the addition of panel curtain walls will inevitably affect the overflow structure of the roof. The existing conventional practice is to hide the drainage pipe connected to the overflow outlet in the cavity between the curtain wall and the exterior wall of the building, and install drainage risers extending from top to bottom to the ground along the exterior wall to drain water using the drainage risers. Although this method can achieve hidden installation, the additional drainage risers will inevitably increase project investment and building material consumption; in addition, this method is suitable for larger installation cavities. For narrow cavities, drainage risers cannot be installed, and hidden installation cannot be achieved. Therefore, in the existing building facade system dominated by panel curtain walls, how to drain the overflow rainwater from the building roof simply and smoothly, while taking into account the integrity and aesthetics of the building's newly added panel curtain wall facade, and complying with the economic rationality, green and low-carbon nature of the existing building renovation project, is a technical problem that needs to be solved in the renovation of existing buildings. Summary of the invention
[0003] In view of this, the applicant conducted relevant research on "Research and Application of Key Technologies for Smart Zero-Carbon Industrial Parks". Based on this research, the applicant proposed a hidden overflow structure for adding curtain walls to existing buildings, and also proposed a construction method for the hidden overflow structure.
[0004] To achieve the above object, the present invention adopts the following technical solutions: The hidden overflow structure for newly adding curtain walls to existing buildings of the present invention comprises an overflow port provided on the parapet of the roof, a mounting hole provided on the curtain wall, a drainage unit and a waterproof unit, wherein the drainage unit comprises a first drainage pipe sealed in the overflow port, a second drainage pipe sealed in the mounting hole and a connecting pipe connecting the first drainage pipe and the second drainage pipe together, wherein the connecting pipe is arranged to be tilted downward so that the second drainage pipe is located below the first drainage pipe, and the inclination angle of the connecting pipe is 15° to 25°; A cover plate of the same color as the curtain wall is hinged at the water outlet of the second drain pipe, and the cover plate and the curtain wall are arranged in the same plane; the water inlet of the first drain pipe extends into the parapet and is provided with an outer flange, and the outer flange is sealed and connected to the inner wall surface of the parapet through a sealant; The waterproof unit comprises at least one waterproof layer arranged along the circumference of the water inlet of the first drain pipe. The waterproof layer is at least one layer, one end of which is attached to the pipe wall of the first drain pipe and the other end is connected to the parapet.
[0005] The beneficial effects are as follows: the present invention installs the first drain pipe, the second drain pipe and the connecting pipe in the cavity between the curtain wall and the outer wall of the building. The construction is simple and convenient, and the water accumulated on the roof can be discharged in time to meet the rapid drainage demand of the roof surface. The concealed installation is also realized, and the facade integrity and aesthetics of the curtain wall are ensured. The present invention can significantly save the amount of pipe materials, and realize the economic rationality, green and low-carbon nature of the existing building renovation project.
[0006] Preferably, the gap between the second drain pipe and the curtain wall is filled with foam rods and coated with sealant to ensure a sealed connection between the second drain pipe and the curtain wall; a hinge is provided at the upper edge of the water outlet of the second drain pipe, and the upper part of the cover plate is fixedly connected to the hinge.
[0007] The connecting ports of the first drain pipe and the second drain pipe are both located in the gap between the curtain wall and the outer wall of the building. The connecting pipe is hot-melt fixedly connected to the first drain pipe and the second drain pipe respectively through connecting elbows, effectively ensuring a reliable connection between the drain pipes and avoiding water leakage as much as possible.
[0008] Preferably, the slope of the first drain pipe and the second drain pipe is ≥5%. In the present invention, the first drain pipe and the second drain pipe are designed with a certain slope and the connecting pipe has a certain inclination angle to ensure that rainwater or snow water is completely discharged and avoids residue in the pipe, thereby protecting the drain pipe. Among them, the inclination angle of the connecting pipe is preferably controlled at 20%.
[0009] The present invention also provides a construction method of a hidden overflow structure, comprising the following construction steps: The first step is to open an overflow port on the parapet, insert the first drain pipe into the overflow port, and ensure that its outer flange is located on the inner side of the parapet; reserve a mounting hole at the designed position of the curtain wall, insert one end of the second drain pipe into the mounting hole of the curtain wall, and use hot-melt technology to fix the connecting pipe to the first drain pipe and the second drain pipe respectively, so that the inclination angle of the connecting pipe is controlled at 15° to 25°; The second step is to seal the junction between the water inlet of the first drain pipe and the inner wall of the parapet with a sealing paste, and construct at least one layer of waterproof layer, so that part of the waterproof layer is adhered to the pipe wall of the first drain pipe, and the other part is bonded and connected to the parapet, and a rainwater grate is fixedly installed on the outer edge of the first drain pipe; The third step is to hinge and install a cover plate with the same color as the curtain wall on the upper part of the drainage end of the second drainage pipe, and fill the gap between the second drainage pipe and the curtain wall with foam rods and apply sealant.
[0010] Compared with the prior art, the present invention installs the first drain pipe, the second drain pipe and the connecting pipe in the cavity between the curtain wall and the outer wall of the building. The construction is simple and convenient, and the water accumulated on the roof can be discharged in time to meet the rapid drainage demand of the roof surface. It also realizes hidden installation, ensuring the facade integrity and aesthetics of the curtain wall. The present invention significantly saves the amount of pipe materials, and realizes the economic rationality, green and low-carbon nature of the existing building renovation project. BRIEF DESCRIPTION OF THE DRAWINGS
[0011] Figure 1 It is a structural schematic diagram of the present invention.
[0012] Figure 2 yes Figure 1 Schematic diagram of direction A. DETAILED DESCRIPTION
[0013] The following is a detailed description of an embodiment of the present invention in conjunction with the accompanying drawings. This embodiment is implemented on the premise of the technical solution of the present invention, and a detailed implementation method and a specific operation process are given, but the protection scope of the present invention is not limited to the following embodiment.
[0014] It should be noted that, in the description of the present invention, relational terms such as “first” and “second” are merely used to distinguish one entity or operation from another entity or operation, and do not necessarily require or imply any actual relationship or order between these entities or operations.
[0015] In the description of the present invention, unless otherwise clearly specified and limited, the terms "connected" and "connection" that may appear should be understood in a broad sense, for example, it can be a fixed connection, a detachable connection, or an integral connection; it can be a mechanical connection or an electrical connection; it can be a direct connection or an indirect connection through an intermediate medium, or it can be the internal communication of two components. For those skilled in the art, the specific meanings of the above terms in the present invention can be understood according to specific circumstances.
[0016] like Figure 1-2As shown, the present invention proposes a hidden overflow structure for newly adding curtain walls to existing buildings, including an overflow port opened on a parapet wall 1 of a roof, a mounting hole opened on a curtain wall 2, a drainage unit and a waterproof unit, the drainage unit including a first drainage pipe 3.1 sealed in the overflow port, a second drainage pipe 3.2 sealed in the mounting hole and a connecting pipe 3.3 connecting the first drainage pipe 3.1 and the second drainage pipe 3.2 together, the connecting ends of the first drainage pipe 3.1 and the second drainage pipe 3.2 are both located in a cavity between the curtain wall 2 and the outer wall of the building, the ports of the connecting pipe 3.3 are respectively connected to the first drainage pipe 3.1 and the second drainage pipe 3.2 by hot melting through a connecting elbow, the connecting pipe 3.3 is arranged to be inclined downward from the first drainage pipe 3.1 so that the second drainage pipe 3.2 is located below the first drainage pipe 3.1, and the inclination angle of the connecting pipe 3.3 is 22.5° (the inclination angle of the connecting pipe 3.3 can be selected within the range of 15° to 25°, and the present invention is not limited to 22.5°); A cover plate 4 having the same color as the curtain wall 2 is hinged at the outlet of the second drainage pipe 3.2. The cover plate 4 and the curtain wall 2 are arranged in the same plane. The cover plate 4 is made of aluminum alloy material, and its color is consistent with the curtain wall 2. The cover plate 4 is hingedly installed. When there is water accumulation on the roof, the gravity of the accumulated water and the acceleration provided by the connecting pipe 3.3 can push the cover plate 4 open to achieve drainage; when there is no water accumulation on the roof, the cover plate 4 automatically resets to ensure the integrity and aesthetics of the facade of the plate curtain wall 2; The water inlet of the first drain pipe 3.1 extends into the parapet 1 and is provided with an outer flange, which is sealed with the inner wall surface of the parapet 1 by a sealing paste 5 to ensure the sealing between the first drain pipe 3.1 and the overflow port; The waterproof unit includes two layers of waterproof layers 6 arranged along the circumference of the water inlet of the first drain pipe 3.1, one end of the waterproof layer 6 is attached to the pipe wall of the first drain pipe 3.1, and the other end is connected to the parapet 1. In actual construction, the waterproof layer 6 uses waterproof coiled material, that is, two layers of waterproof coiled material are laid successively, and the ends of the waterproof coiled material are closed so that it is glued inside the first drain pipe 3.1 to ensure the waterproof and sealed connection between the first drain pipe 3.1 and the parapet 1 to avoid water leakage; a stainless steel rainwater grate 7 is installed on the waterproof layer 6, and the rainwater grate 7 is located at the water inlet of the first drain pipe 3.1 to prevent debris from entering the drainage unit and clogging the drainage unit, further ensuring drainage performance.
[0017] During actual construction, the gap between the second drain pipe 3.2 and the curtain wall 2 is filled with foam rods 8 and coated with sealant 9 to ensure a sealed connection between the second drain pipe 3.2 and the curtain wall 2; a hinge is provided at the upper edge of the water outlet of the second drain pipe 3.2, and the upper part of the cover plate 4 is fixed to the hinge by self-tapping screws. It is opened for drainage when rainwater impacts, and is in a closed state when not draining, to ensure the integrity and aesthetics of the plate curtain wall 2.
[0018] In actual construction, the slope of the first drain pipe 3.1 and the second drain pipe 3.2 are both 5%. The present invention designs the first drain pipe 3.1 and the second drain pipe 3.2 to have a certain slope and the connecting pipe 3.3 has a certain inclination angle to ensure that rainwater or snow water is completely discharged and avoids residue in the pipe, thereby protecting the drainage unit and ensuring its service life. The first drain pipe 3.1, the second drain pipe 3.2 and the connecting pipe 3.3 are preferably made of PE material, which can be a round pipe, a square pipe or a rectangular pipe, and the cross-sectional size can be flexibly selected according to the drainage requirements of the building roof.
[0019] The present invention provides a construction method of a hidden overflow structure, comprising the following construction steps: The first step is to open an overflow port on the parapet 1 (the opening height of the overflow port is in accordance with the design requirements), reserve a mounting hole on the curtain wall 2, pass the first drain pipe 3.1 through the overflow port to ensure that its outer flange is located inside the parapet 1, insert one end of the second drain pipe 3.2 into the mounting hole of the curtain wall 2, and use the connecting pipe 3.3 to connect the first drain pipe 3.1 and the second drain pipe 3.2 together. The connecting pipe 3.3 and the first drain pipe 3.1 are fixedly connected by hot-melting with a connecting elbow, and the connecting pipe 3.3 and the second drain pipe 3.2 are fixedly connected by hot-melting with a connecting elbow, and the inclination angle of the connecting pipe 3.3 and is controlled at 22.5°, thereby completing the fixed connection of the drainage unit; In the second step, the intersection of the first drain pipe 3.1 and the inner wall surface of the parapet 1 is sealed with a sealing paste 5, and a waterproof roll is laid on the roof, and the waterproof roll is closed at the water inlet of the first drain pipe 3.1 so that the waterproof roll is partially adhered to the first drain pipe 3.1; an installation groove is opened on the inner wall surface of the parapet 1, and the end of the waterproof roll is embedded in the installation groove to ensure the sealing performance between the first drain pipe 3.1 and the parapet 1; After the waterproofing membrane is laid, a stainless steel rainwater grate 7 is installed using self-tapping screws. The rainwater grate 7 is located at the water inlet of the first drainage pipe 3.1 to prevent debris from entering the drainage unit and clogging the drainage unit. The third step is to install a hinge at the end of the second drain pipe 3.2 (the color of the hinge is consistent with the color of the curtain wall 2, and the hinge is fixed to the second drain pipe 3.2 by self-tapping screws), and fix the cover plate 4 on the hinge by self-tapping bolts. The cover plate 4 is made of aluminum alloy with the same color as the curtain wall 2 (of course, it can also be painted to make it consistent with the color of the curtain wall 2); fill the foam rod between the second drain pipe 3.2 and the curtain wall 2, and apply sealant to form a sealing layer to ensure the reliable connection between the second drain pipe and the curtain wall, and complete the construction of a hidden overflow structure; Repeat the construction to install multiple hidden overflow structures between the roof and curtain wall 2.
[0020] The present invention installs a first drain pipe 3.1, a second drain pipe 3.2 and an inclined connecting pipe 3.3 in a cavity between a curtain wall 2 and an outer wall of a building. The construction is simple and convenient, and the water accumulated on the roof can be discharged in time to meet the demand for rapid drainage of the roof surface. The concealed installation is also realized, and the facade integrity and aesthetics of the curtain wall 2 are ensured. The present invention drains water from the facade of the curtain wall 2 and utilizes the inclined connecting pipe 3.3 for transition. There is no need for a drainage riser, which significantly saves the amount of pipe materials and realizes the economic rationality, greenness and low-carbon nature of the existing building renovation project.
[0021] Finally, it should be emphasized that the above is only a preferred embodiment of the present invention and is not intended to limit the present invention. Although the present invention has been described in detail with reference to the aforementioned embodiments, those skilled in the art can still modify the technical solutions recorded in the aforementioned embodiments without creative work, or replace some of the technical features therein with equivalents. Therefore, any modification, equivalent replacement, improvement, etc. made within the spirit and principle of the present invention should be included in the protection scope of the present invention.
Claims
1. A hidden overflow structure for newly adding curtain walls to existing buildings, characterized in that: It includes an overflow port on the parapet of the roof, a mounting hole on the curtain wall, a drainage unit and a waterproof unit, wherein the drainage unit includes a first drainage pipe sealed in the overflow port, a second drainage pipe sealed in the mounting hole and a connecting pipe connecting the first drainage pipe and the second drainage pipe together, wherein the connecting pipe is tilted downward so that the second drainage pipe is located below the first drainage pipe, and the inclination angle of the connecting pipe is 15° to 25°; a cover plate of the same color as the curtain wall is hinged at the water outlet of the second drainage pipe, and the cover plate and the curtain wall are arranged in the same plane; the water inlet of the first drainage pipe extends into the parapet and is provided with an outer flange, and the outer flange is sealed and connected to the inner wall surface of the parapet through a sealant; The waterproof unit comprises at least one waterproof layer arranged along the circumference of the water inlet of the first drain pipe. The waterproof layer is at least one layer, one end of which is attached to the pipe wall of the first drain pipe and the other end is connected to the parapet.
2. The hidden overflow structure for newly adding curtain walls to existing buildings according to claim 1 is characterized in that: The gap between the second drain pipe and the curtain wall is filled with foam rods and coated with sealant; a hinge is arranged at the upper edge of the water outlet of the second drain pipe, and the upper part of the cover plate is fixedly connected to the hinge.
3. The hidden overflow structure for newly adding curtain walls to existing buildings according to claim 1 is characterized in that: The connection ports of the first drain pipe and the second drain pipe are both located in the gap between the curtain wall and the outer wall of the building, and the connecting pipe is respectively connected to the first drain pipe and the second drain pipe by hot melting through a connecting elbow.
4. The hidden overflow structure for newly adding curtain walls to existing buildings according to claim 1 is characterized in that: The slope of the first drain pipe and the second drain pipe is ≥5%.
5. A construction method of the hidden overflow structure according to claim 1, characterized in that: The construction method comprises the following construction steps: The first step is to open an overflow port on the parapet, insert the first drain pipe into the overflow port, and ensure that its outer flange is located on the inner side of the parapet; reserve a mounting hole at the designed position of the curtain wall, insert one end of the second drain pipe into the mounting hole of the curtain wall, and use hot-melt technology to fix the connecting pipe to the first drain pipe and the second drain pipe respectively, so that the inclination angle of the connecting pipe is controlled at 15° to 25°; The second step is to seal the junction between the water inlet of the first drain pipe and the inner wall of the parapet with a sealing paste, and construct at least one layer of waterproof layer, so that part of the waterproof layer is adhered to the pipe wall of the first drain pipe, and the other part is bonded and connected to the parapet, and a rainwater grate is fixedly installed on the outer edge of the first drain pipe; The third step is to hinge and install a cover plate with the same color as the curtain wall on the upper part of the drainage end of the second drainage pipe, and fill the gap between the second drainage pipe and the curtain wall with foam rods and apply sealant.