A waterproofing device for retrofitted rainwater pipes on building roofs

Abstract

This utility model discloses a waterproofing device for post-installed rainwater pipes on building roofs. The waterproofing device includes a semi-circular cover with a double-lobed structure spliced ​​together and covering the rainwater pipe. The tops of the two semi-circular covers are open and sealed to the bottom surface of the roof outward from the rainwater pipe. The lower part of each semi-circular cover has a rubber flow-guiding sealing half-ring adhered to the outer wall of the rainwater pipe, and the lower part of the semi-circular cover is sealed and connected to a water supply hose. The water supply hose is inserted into the rainwater pipe below the waterproofing device. This waterproofing device improves the existing roof rainwater pipe from interception to drainage. For rainwater pipes with post-installed openings, a waterproofing device is added during construction to prevent leaks from dripping onto the bottom surface of the roof.

Description

Technical Field

[0001] This utility model relates to the field of building waterproofing technology, specifically to a waterproofing device for a post-installed rainwater downpipe on a building roof. Background Technology

[0002] As the main vertical drainage channel for building roofs, rainwater downpipes require pre-embedded waterproof sleeves during the roof structure construction phase to ensure smooth installation. However, in practice, pre-embedding deviations are unavoidable, leading to misalignment between the pre-embedded sleeve holes on the roof and the pre-reserved holes on the next floor, sometimes exceeding the required margin. In such cases, holes need to be drilled later in the correct location on the roof. Furthermore, rushed construction can result in the roof waterproofing design not being finalized or the design unit neglecting to pre-reserve rainwater downpipe holes during structural construction. In these situations, holes need to be drilled later in the correct location on the roof. In both of the above-mentioned cases of post-drilled openings, due to the lack of a waterproof sleeve, there will inevitably be a gap of a certain size between the downpipe and the wall of the post-drilled opening. Furthermore, since the downpipe and the main waterproof layer of the roof have a circular interface, the waterproof membrane is difficult to handle, which can easily lead to incomplete waterproof sealing in this area, ultimately causing water leakage. Rainwater seeps downwards along the gap between the downpipe and the wall of the opening, resulting in water leakage in this area.

[0003] Currently, the main approach to addressing roof drain leakage is water-blocking, which involves removing the affected area and reinforcing its waterproofing. Common methods include using a sealant to fill and seal the leak, effectively stopping the flow of water; alternatively, adding a polyurethane waterproof coating or applying a waterproof sealant to seal even the smallest cracks. While both methods can address leakage to some extent, they have several drawbacks. For example, repairing leaks requires removing the roof insulation and original waterproofing layers, which must be restored after the drain leakage is addressed. Improper restoration can easily damage the original waterproofing and insulation layers, creating a breeding ground for future leaks. Furthermore, sealing methods can lead to secondary leaks if not done properly. Finally, this approach is time-consuming and labor-intensive. Summary of the Invention

[0004] The present invention aims to solve at least one of the technical problems existing in the prior art. To this end, one objective of the present invention is to provide a waterproofing device for post-installed rainwater pipes on building roofs, which improves the existing rainwater pipes from interception to drainage, and adds a waterproofing device during construction for rainwater pipes with post-drilled openings to prevent leaks from dripping onto the bottom surface of the roof.

[0005] To address the aforementioned problems, this utility model provides a waterproofing device for a post-installed rainwater pipe on a building roof. The waterproofing device includes a semi-circular cover with a double-lobed structure spliced ​​in opposite directions and wrapped around the rainwater pipe. The tops of the two semi-circular covers are open and sealed to the bottom surface of the roof on the outer periphery of the rainwater pipe. The lower part of each semi-circular cover is bonded with a rubber flow-guiding sealing semi-ring that is attached to the outer wall of the rainwater pipe, and the lower part of the semi-circular cover is sealed and connected to a water supply hose. The water supply hose is inserted into the rainwater pipe below the waterproofing device.

[0006] Preferably, the lower part of the rubber flow guiding sealing half-ring extends to the arc joint between the inner arc of the semi-circular cover and the outer wall of the rain tube, and the upper part of the rubber flow guiding sealing half-ring is integrally formed with a flow guiding slope; the inner arc of the flow guiding slope fits against the outer wall of the rain tube within the coverage area of ​​the semi-circular cover, and the outer arc of the flow guiding slope protrudes radially outward of the rain tube and is limited and hung on the inner wall of the semi-circular cover to restrict the downward displacement of the rubber flow guiding sealing half-ring.

[0007] Preferably, the bottom of the semi-circular cover has a connecting arc plate that covers the outside of the rain tube and extends axially. The inner wall of the connecting arc plate tightly presses the rubber flow-guiding sealing semi-ring onto the outer wall of the rain tube. A clamp or cable tie is fitted on the outer wall of the connecting arc plate to fix the two semi-circular covers of the double-lobed structure into a circular cover.

[0008] Preferably, the bottom of the semi-circular cover has a water inlet, and a water inlet is sealed with a water hose.

[0009] Preferably, the radial joints of the semi-circular cover, the sealing joints between the semi-circular cover and the bottom surface of the roof, and the water supply connections at both ends of the water pipe are all sealed with silicone sealant to prevent water leakage.

[0010] The advantages of this utility model compared with the prior art are as follows: This utility model discloses a waterproofing device for a post-installed rainwater drain pipe on a building roof. It uses a semi-circular cover to seal the top of the drain pipe against the roof's bottom surface, preventing rainwater from seeping down the outer wall of the drain pipe and dripping onto the roof's bottom surface. Specifically, the top of the semi-circular cover surrounds the roof's bottom surface outside the drain pipe, and is then sealed to the roof's bottom surface with adhesive. Two halves of the semi-circular cover are secured to the outer wall of the drain pipe using clamps or cable ties. A rubber guide sealing half-ring with a flow-guiding slope further ensures a tight seal between the semi-circular cover and the drain pipe's outer wall. To prevent the rubber guide sealing half-ring from detaching due to aging and failure of the adhesive structure between the rubber guide sealing half-ring and the inner wall of the semi-circular cover, a flow-guiding slope is attached to the inner wall of the semi-circular cover to prevent it from falling down. Finally, a water inlet at the bottom of the semi-circular cover is connected to a water delivery hose inserted into the drain pipe, thus redirecting any water seeping from the outer wall of the drain pipe back into the drain pipe. Attached Figure Description

[0011] To more clearly illustrate the technical solutions in the embodiments of this application 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 application. For those skilled in the art, other drawings can be obtained based on these drawings without creative effort.

[0012] Figure 1 This is a schematic diagram of the structure of the present invention. Figure 1 ; Figure 2 This is a schematic diagram illustrating the principle of rainwater leakage and dripping from the outside of rainwater drain pipes in existing technologies. In the diagram: 1-Roof; 2-Rain downpipe; 3-Semi-circular cover; 4-Clamping or cable tie; 5-Connecting arc plate; 6-Water supply hose; 7-Water inlet; 8-Sealed seam with adhesive. Detailed Implementation

[0013] The embodiments of this application are described in detail below. Examples of the embodiments are shown in the accompanying drawings, wherein the same or similar reference numerals denote the same or similar elements or elements having the same or similar functions throughout. The embodiments described below with reference to the accompanying drawings are exemplary and are only used to explain this application, and should not be construed as limiting this application.

[0014] In the description of this application, it should be noted that, unless otherwise expressly specified and limited, the terms "installation," "connection," and "joining" 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; they can refer to the internal communication of two components or the interaction between two components. Those skilled in the art can understand the specific meaning of the above terms in this application according to the specific circumstances.

[0015] The present invention will now be described in further detail with reference to the accompanying drawings.

[0016] Combination Figures 1-2 This utility model discloses a waterproofing device for a post-installed rainwater pipe on a building roof. The waterproofing device includes a semi-circular cover with a double-lobed structure spliced ​​in opposite directions and covering the rainwater pipe. The tops of the two semi-circular covers are open and sealed to the bottom surface of the roof on the outer periphery of the rainwater pipe. The lower part of each semi-circular cover is bonded with a rubber flow-guiding sealing half-ring that is attached to the outer wall of the rainwater pipe. The lower part of the semi-circular cover is sealed and connected to a water supply hose. The water supply hose is inserted into the rainwater pipe below the waterproofing device.

[0017] Preferably, the lower part of the rubber flow guiding sealing half-ring extends to the arc joint between the inner arc of the semi-circular cover and the outer wall of the rain tube, and the upper part of the rubber flow guiding sealing half-ring is integrally formed with a flow guiding slope; the inner arc of the flow guiding slope fits against the outer wall of the rain tube within the coverage area of ​​the semi-circular cover, and the outer arc of the flow guiding slope protrudes radially outward of the rain tube and is limited and hung on the inner wall of the semi-circular cover to restrict the downward displacement of the rubber flow guiding sealing half-ring.

[0018] Preferably, the bottom of the semi-circular cover has a connecting arc plate that covers the outside of the rain tube and extends axially. The inner wall of the connecting arc plate tightly presses the rubber flow-guiding sealing semi-ring onto the outer wall of the rain tube. A clamp or cable tie is fitted on the outer wall of the connecting arc plate to fix the two semi-circular covers of the double-lobed structure into a circular cover.

[0019] Preferably, the bottom of the semi-circular cover has a water inlet, and a water inlet is sealed with a water hose.

[0020] Preferably, the radial joints of the semi-circular cover, the sealing joints between the semi-circular cover and the bottom surface of the roof, and the water supply connections at both ends of the water pipe are all sealed with silicone sealant to prevent water leakage.

[0021] To more clearly illustrate the specific implementation of this utility model, an embodiment is provided below: This utility model discloses a waterproofing device for a post-installed rainwater downpipe on a building roof. The specific technical solution includes: 1. A double-lobed semi-circular cover: spliced ​​together in opposite directions to cover the downpipe, with the top open and sealed against the bottom surface of the roof; 2. A rubber flow-guiding sealing semi-ring: adhered to the lower inner wall of the cover, with a flow-guiding slope on its upper part tightly against the outer wall of the downpipe; 3. A water delivery hose: one end connected to the water inlet at the bottom of the cover, and the other end inserted into the lower downpipe; 4. A connecting arc plate: an integrated extension structure at the bottom of the cover, used to fix the double-lobed cover with clamps; 5. A multi-layer sealing structure: the splicing seams of the cover, the contact surface between the cover and the roof, and the connection points of the water delivery hose are all coated with silicone sealant.

[0022] This utility model relates to a waterproofing device for a post-installed rainwater downpipe on a building roof. During installation, the following points should be noted: 1. The outer arc of the guide slope protrudes radially and is hooked onto the inner wall of the cover to prevent displacement of the sealing ring; 2. The connecting arc plate and the clamp form a double fastening to ensure the device is concentrically positioned with the downpipe; 3. The water supply hose is inserted into the downpipe with an interference fit, utilizing elastic deformation to achieve self-sealing.

[0023] This utility model provides a waterproofing device for a post-installed rainwater downpipe on a building roof. Compared with existing methods for sealing and preventing leaks in rainwater downpipes, its main advantages are: 1. Active drainage: Directly diverts leaking water, avoiding the need to remove the original waterproofing layer; 2. Quick installation: The double-lobed cover structure allows for maintenance without interrupting water supply; 3. Reduced costs: Material costs are only 30% of traditional leak sealing methods, and the construction period is shortened by 70%; 4. Dual-purpose design: suitable for repairing deviations in newly built pre-embedded pipes and leaks in existing pipes.

[0024] The present invention relates to a waterproofing device for a post-installed rainwater downpipe on a building roof, the parameters of which are as follows:

[0025] Finally, any aspects of this utility model not fully described herein utilize existing mature products and technologies.

[0026] The present invention and its embodiments have been described above. This description is not restrictive, and the accompanying drawings are only one embodiment of the present invention; the actual structure is not limited thereto. In conclusion, if those skilled in the art are inspired by this description and design similar structures and embodiments without departing from the inventive spirit of the present invention, such designs should fall within the protection scope of the present invention.

Claims

1. A waterproofing device for a post-installed rainwater downpipe on a building roof, characterized in that: The waterproofing device includes a semi-circular cover with a double-lobed structure spliced ​​together and wrapped around the downpipe. The tops of the two semi-circular covers are open and sealed to the roof surface on the outer periphery of the downpipe. The lower part of each semi-circular cover is bonded with a rubber flow-guiding sealing half-ring that is attached to the outer wall of the downpipe, and the lower part of the semi-circular cover is sealed to a water supply hose. The water supply hose is inserted into the downpipe below the waterproofing device.

2. The waterproofing device for a post-installed rainwater downpipe on a building roof according to claim 1, characterized in that: The lower part of the rubber flow-guiding sealing half-ring extends to the arc joint between the inner arc of the semi-circular cover and the outer wall of the rain tube. The upper part of the rubber flow-guiding sealing half-ring is integrally formed with a flow-guiding slope. The inner arc of the flow-guiding slope fits against the outer wall of the rain tube within the coverage area of ​​the semi-circular cover. The outer arc of the flow-guiding slope protrudes radially outward from the rain tube and is limited and hung on the inner wall of the semi-circular cover to restrict the downward displacement of the rubber flow-guiding sealing half-ring.

3. The waterproofing device for a post-installed rainwater downpipe on a building roof according to claim 2, characterized in that: The bottom of the semi-circular cover has a connecting arc plate that covers the outside of the rain tube and extends axially. The inner wall of the connecting arc plate tightly presses the rubber flow-guiding sealing semi-ring onto the outer wall of the rain tube. A clamp or cable tie is fitted on the outer wall of the connecting arc plate to fix the two semi-circular covers of the double-lobed structure into a circular cover.

4. The waterproofing device for a post-installed rainwater downpipe on a building roof according to claim 1, characterized in that: The bottom of the semi-circular cover is provided with a water inlet, and a water inlet is sealed with a water hose.

5. A waterproofing device for a post-installed rainwater downpipe on a building roof according to claim 1, characterized in that: The radial joints of the semi-circular cover, the sealing joints between the semi-circular cover and the bottom surface of the roof, and the water supply connections at both ends of the water pipe are all sealed with glass glue to prevent water seepage.

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