A new building roof rainwater drainage overflow device

Abstract

This utility model relates to the field of drainage engineering, specifically a novel roof rainwater drainage overflow device, including a roof wall. An inner wall is located on the right side of the top of the roof wall, and an inner wall drainage pipe is installed on the right side wall of the inner wall. An outer wall is also located at the top of the roof wall. Guide slopes are provided on both sides of the inner interior of the outer wall. A drainage overflow body is located inside the outer wall, between the two guide slopes. An overflow pipe mechanism is installed inside the drainage overflow body to discharge overflowing water. A fine filter screen is elastically suspended by a spring, and vibrates naturally at high frequency when impacted by water flow, automatically shaking off impurities such as mud, sand, and fibers adhering to the screen surface. This eliminates the need for manual disassembly of pipes or the use of special tools, avoiding repeated disassembly and reassembly that could damage the roof waterproofing, and reducing the risk and frequency of operation in severe weather.

Description

Technical Field

[0001] This utility model relates to the field of drainage engineering technology, specifically to a novel roof rainwater drainage overflow outlet device. Background Technology

[0002] In building roof rainwater drainage systems, overflow outlets are core components for coping with extreme rainfall and ensuring roof drainage safety. They are used to quickly drain water when the main drainage system (such as rainwater hoppers and downpipes) is overloaded, preventing roof water leakage or structural damage. With the improvement of building waterproofing standards and the promotion of the sponge city concept, higher requirements are placed on the filtration accuracy, self-cleaning ability, and ease of maintenance of overflow outlets.

[0003] The existing filtration systems for rainwater overflow outlets on building roofs have the following shortcomings when in use: The overflow outlet filter is embedded in the closed cavity of the pipe, which has rigidity defects in the cleaning process. The inner diameter of the pipe is mostly 80~150mm, and the internal space is cramped. Usually, the pipe needs to be disassembled during cleaning, which requires breaking the insulation layer and loosening the flange bolts (or cutting the welded section). This not only damages the roof waterproof structure, but also increases the risk of falling from a height because the pipe is suspended. Even if a custom long-handled tool is used, the worker has to turn sideways to reach into the pipe. Due to blind spots and limitations in the angle of force, it is time-consuming and laborious. Utility Model Content

[0004] This utility model addresses the technical problems existing in the prior art by providing a novel roof rainwater drainage overflow device.

[0005] The technical solution of this utility model to solve the above-mentioned technical problems is as follows: A novel roof rainwater drainage overflow device includes a roof wall, an inner wall is provided on the right side of the top of the roof wall, an inner wall drainage pipe is provided on the right side wall of the inner wall, an outer wall is also provided on the top of the roof wall, guide slopes are provided on both sides of the inner interior of the outer wall, a drainage overflow body is provided inside the outer wall and located between the two guide slopes, and an overflow pipe mechanism is provided inside the drainage overflow body. The overflow pipe mechanism is used to discharge the overflowing water and filter the water during discharge. The overflow pipe mechanism is also provided with a garbage cleaning mechanism on the left side, and a self-cleaning filter structure is also provided on the left side inside the overflow pipe mechanism. The self-cleaning filter structure is used to further filter the garbage inside the overflow pipe mechanism, and the filtered garbage will enter the garbage cleaning mechanism. The garbage cleaning mechanism is used to pull up and then carry the garbage out for cleaning.

[0006] By setting up an overflow pipe mechanism, rainwater can be discharged while simultaneously being preliminarily filtered. This effectively intercepts larger impurities (such as fallen leaves and pebbles) in the rainwater, preventing them from directly entering the drainage pipes and causing blockages. This solves the problem of traditional overflow outlets lacking a filtration structure and easily causing pipe siltation, ensuring the long-term smooth operation of the drainage system and reducing the maintenance cost of pipe dredging.

[0007] The self-cleaning filter structure further refines the rainwater after it has been initially filtered by the overflow pipe mechanism, intercepting smaller particles of impurities (such as silt, debris, etc.) and further improving the cleanliness of the drainage. At the same time, its design allows the filtered waste to directly enter the waste cleaning mechanism, preventing impurities from accumulating on the filter screen and causing a decrease in filtration efficiency. This solves the problems of traditional filter screens being prone to clogging and requiring frequent disassembly and cleaning, ensuring continuous and stable filtration function.

[0008] Furthermore, the overflow pipe mechanism includes a pipe body installed inside the drain overflow port body. A first threaded connection groove is provided on the top outer wall of the pipe body. A fixing ring is also fixedly connected inside the pipe body near the top. A permanent magnet is provided on the top of the fixing ring. The pipe body provides a stable channel for overflow drainage. The first threaded connection groove cooperates with the permanent magnet to provide double connection protection for the subsequent installation pipe fixation (threaded connection to prevent detachment + magnetic attraction to assist positioning), avoiding the problem of easy loosening in the traditional single connection method, and laying the foundation for quick installation and disassembly of the installation pipe.

[0009] Furthermore, the overflow pipe mechanism also includes an installation pipe, which is located inside the pipe body. The bottom of the installation pipe is provided with a connecting adsorption groove, and the interior of the installation pipe is also provided with a coarse barrier mesh. The connecting adsorption groove is inserted into a permanent magnet to form a fixation. The top of the installation pipe is also provided with a first threaded connecting ring, which is inserted into the first threaded connecting groove for use. The coarse barrier mesh can first intercept large-volume impurities such as leaves and branches, preventing them from entering the downstream and clogging the pipe. The installation pipe can be quickly installed and removed through "threaded connection + magnetic attraction". The coarse barrier mesh can be removed and cleaned without tools, solving the cumbersome problem of traditional coarse filter cleaning requiring pipe disassembly.

[0010] Furthermore, the self-cleaning filter structure includes a mounting ring, which is fixedly installed inside the tube and located on the left side. Several springs are fixedly connected to the right side wall of the mounting ring, and a fine filter screen is fixedly connected to the right side wall of the springs. The fine filter screen can intercept tiny impurities such as fine sand and fibers, improving filtration accuracy. The spring connection gives the fine filter screen elastic movement space, providing a structural basis for self-vibration under the impact of subsequent water flow, and solving the problem that traditional fixed filter screens are easily clogged by fine impurities.

[0011] Furthermore, the waste cleaning mechanism includes a connecting hole located on the left side of the drain overflow outlet body. A sleeve is fixed inside the connecting hole, and an installation groove is provided around the connecting hole. A threaded connecting box is fixedly connected inside the installation groove. A second threaded connecting ring is threadedly connected inside the threaded connecting box. A top plate is provided on the top of the second threaded connecting ring, and a connecting rope is provided at the center of the bottom of the top plate. A collection box is provided at the bottom of the connecting rope, and an installation pipe is provided outside the collection box. The installation pipe is fixedly located at the bottom of the pipe body and on the right side of the bottom of the fine filter screen. The installation pipe provides directional guidance for the collection box, ensuring that impurities fall accurately. The threaded connecting box and the second threaded connecting ring cooperate to fix the position of the collection box, preventing displacement due to water flow impact during drainage. At the same time, it provides a stable operating structure for subsequent lifting and cleaning, solving the problems of non-directional impurity collection and easy displacement during cleaning in traditional methods.

[0012] Furthermore, when the fine filter screen is impacted by water flow, it will generate strong vibration through the spring, which will shake off the dust clogging the outer surface of the fine filter screen into the collection box located inside the installation pipe. The vibration of the fine filter screen is driven by the impact force of the water flow itself, which can achieve self-cleaning without external power. The automatically shaken impurities are directed into the collection box through the installation pipe, avoiding impurities from remaining on the surface of the filter screen or entering the downstream pipe with the water flow. This solves the problems of traditional filter screens requiring manual disassembly and washing and the easy accumulation of impurities.

[0013] Furthermore, when the top plate is rotated, the second threaded connecting ring will disengage from the threaded connecting box and drive the connecting rope to pull the collection box to the outside, thereby realizing the treatment of the garbage inside the collection box. The collection box can be quickly removed by rotating the top plate without wading or disassembling the overflow pipe mechanism, avoiding repeated disassembly and assembly that could damage the roof waterproofing structure, reducing the hygiene risks and operational difficulties of cleaning, and solving the problems of low efficiency and easy damage to the roof caused by traditional impurity cleaning.

[0014] The beneficial effects of this utility model are: the fine filter screen is suspended by spring elasticity and vibrates naturally at high frequency when water flows, which can shake off the mud, sand and fiber and other impurities adhering to the screen surface. There is no need to manually disassemble the pipe or use special tools, avoiding damage to the roof waterproofing caused by repeated disassembly and reassembly, and reducing the risk and frequency of operation in bad weather.

[0015] The collection box of the garbage collection unit catches the impurities shaken off the filter screen. By rotating the top plate, the collection box can be lifted by the connecting rope. There is no need to wade into the sewage or disassemble the device, realizing "directional collection of impurities and one-click cleaning", avoiding the accumulation of debris in downstream pipes and improving the hygiene and efficiency of operation and maintenance.

[0016] The overflow pipe adopts a magnetic and threaded double connection, and the installation pipe can be quickly installed and removed, facilitating regular cleaning of the coarse barrier screen; the flexible connection structure of the self-cleaning filter screen supports tool-free quick maintenance, greatly shortening maintenance time and ensuring the integrity of the roof structure and the continuous operation of the drainage system. Attached Figure Description

[0017] Figure 1 This is a structural diagram of the main body of this utility model; Figure 2 This is a structural diagram of the roof wall of this utility model; Figure 3 A first-person perspective schematic diagram of the overflow pipe mechanism and the waste cleaning mechanism of this utility model; Figure 4 A second-view schematic diagram illustrating the overflow pipe mechanism and the waste cleaning mechanism of this utility model; Figure 5 This is a schematic diagram of the main cross-sectional structure of the present utility model; Figure 6 For the present utility model Figure 5 Enlarged schematic diagram of the structure at point A in the middle.

[0018] The attached diagram lists the components represented by each number as follows: 10. Roof wall; 20. Interior wall; 30. Interior wall drainage pipe; 40. Exterior wall; 50. Guide slope; 60. Drainage overflow outlet body; 70. Overflow pipe mechanism; 701. Pipe body; 702. First threaded connection groove; 703. Installation pipe; 704. First threaded connection ring; 705. Connection adsorption groove; 706. Coarse barrier mesh; 707. Fixing ring; 708. Permanent magnet; 80. Garbage cleaning mechanism; 801. Connection hole; 802. Installation groove; 803. Sleeve; 804. Top plate; 805. Second threaded connection ring; 806. Installation pipe; 807. Collection box; 808. Connecting rope; 809. Threaded connection box; 90. Self-cleaning filter structure; 901. Installation ring; 902. Spring; 903. Fine filter. Detailed Implementation

[0019] The technical solutions of the embodiments of this application will be clearly and completely described below with reference to the accompanying drawings. Obviously, the described embodiments are only some embodiments of this application, and not all embodiments. Based on the embodiments of this application, all other embodiments obtained by those skilled in the art without creative effort are within the scope of protection of this application.

[0020] In the description of this application, the terms "first" and "second" are used for descriptive purposes only and should not be construed as indicating or implying relative importance or implicitly specifying the number of indicated technical features. Thus, a feature defined as "first" or "second" may explicitly or implicitly include one or more of the stated features. In the description of this application, "multiple" means two or more, unless otherwise explicitly specified.

[0021] In the description of this application, the term "for example" is used to mean "used as an example, illustration, or description." Any embodiment described as "for example" in this application is not necessarily to be construed as being more preferred or advantageous than other embodiments. The following description is provided to enable any person skilled in the art to implement and use the present invention. Details are set forth in the following description for purposes of explanation. It should be understood that those skilled in the art will recognize that the present invention can be implemented without using these specific details. In other instances, well-known structures and processes will not be described in detail to avoid obscuring the description of the present invention with unnecessary detail. Therefore, the present invention is not intended to be limited to the embodiments shown, but is consistent with the broadest scope of the principles and features disclosed in this application.

[0022] Example Figure 1 This is a structural diagram of the main body of this utility model. Figure 2 This is a structural diagram of the roof wall of this utility model. Figure 3 The diagram shows the overflow pipe mechanism and the waste cleaning mechanism of this utility model from a first-person perspective. Figure 4 This is a second-view schematic diagram of the overflow pipe mechanism and the waste cleaning mechanism of this utility model. Figure 5 This is a schematic diagram of the main cross-sectional structure of this utility model. Figure 6 For the present utility model Figure 5 An enlarged schematic diagram of the structure at point A in the middle, as shown below. Figure 1 , Figure 2 , Figure 3 , Figure 4 , Figure 5 , Figure 6As shown, the device includes a roof wall 10, an inner wall 20 on the right side of the top of the roof wall 10, an inner wall drain pipe 30 on the right side wall of the inner wall 20, an outer wall 40 on the top of the roof wall 10, guide slopes 50 on both sides inside the outer wall 40, and a drain overflow body 60 inside the outer wall 40 and between the two guide slopes 50. An overflow pipe mechanism 70 is provided inside the drain overflow body 60, which is used to discharge overflowing water and filter the water during discharge. A garbage cleaning mechanism 80 is provided on the left side of the overflow pipe mechanism 70, and a self-cleaning filter structure 90 is provided on the left side inside the overflow pipe mechanism 70. The self-cleaning filter structure 90 is used to further filter the garbage inside the overflow pipe mechanism 70, and the filtered garbage will enter the garbage cleaning mechanism 80. The garbage cleaning mechanism 80 is used to pull up and carry the garbage out for cleaning.

[0023] During normal rainfall, rainwater is discharged first through the inner wall drainage pipe 30 of the inner wall 20. When the rainfall is too heavy and the inner wall drainage pipe 30 is overloaded, the rainwater gathers at the top of the roof wall 10 and overflows to the outside. The guide slope 50 inside the outer wall 40 gathers the dispersed rainwater in the middle and makes it flow into the drainage overflow outlet body 60. The rainwater entering the drainage overflow outlet body 60 is first filtered by the overflow pipe mechanism 70 to intercept larger impurities. Then it flows through the self-cleaning filter structure 90 for deep filtration to remove fine impurities. The filtered impurities enter the garbage cleaning mechanism 80 under the action of the structure. Finally, the impurities can be cleaned by pulling up the garbage cleaning mechanism 80, forming a complete process of "main drainage - overflow - multi-stage filtration - impurity collection - convenient cleaning".

[0024] like Figures 3 to 6 As shown, the overflow pipe mechanism 70 includes a pipe body 701, which is installed inside the drain overflow port body 60. A first threaded connection groove 702 is provided on the top outer wall of the pipe body 701. A fixing ring 707 is also fixedly connected inside the pipe body 701 near the top. A permanent magnet 708 is provided on the top of the fixing ring 707.

[0025] The pipe body 701 serves as the main channel for overflow drainage. Its outer wall is fitted and installed with the overflow outlet body 60 to ensure a stable inflow of rainwater. The first threaded connection groove 702 at the top of the pipe body 701 provides a threaded connection base for subsequent components. The fixing ring 707 supports and positions the permanent magnet 708, keeping the permanent magnet 708 stably positioned inside the pipe body 701 near the top. Through the cooperation of the first threaded connection groove 702 and the permanent magnet 708, the subsequent components can be double-fixed (threaded connection + magnetic attraction assistance), which not only ensures the stability of the connection but also facilitates the disassembly and assembly of the components.

[0026] The overflow pipe mechanism 70 also includes an installation pipe 703, which is located inside the pipe body 701. The bottom of the installation pipe 703 is provided with a connecting adsorption groove 705. The inside of the installation pipe 703 is also provided with a coarse barrier mesh 706. The connecting adsorption groove 705 is inserted into the permanent magnet 708 to form a fixation. The top of the installation pipe 703 is also provided with a first threaded connecting ring 704, which is inserted into the first threaded connecting groove 702 for use.

[0027] The mounting tube 703 is threadedly engaged with the first threaded groove 702 of the tube body 701 via the first threaded connecting ring 704 at the top. Simultaneously, the connecting adsorption groove 705 at the bottom attracts the permanent magnet 708 on the fixing ring 707, forming a dual fixing structure of "threaded connection + magnetic attraction". This ensures that the mounting tube 703 is stably installed inside the tube body 701 and is not easily loosened. When rainwater flows into the tube body 701, it first passes through the coarse barrier mesh 706 inside the mounting tube 703. The mesh of the coarse barrier mesh 706 can intercept large impurities such as leaves, branches, and large stones, preventing them from entering the downstream of the tube body 701 and causing blockages. The rainwater then flows downward through the coarse barrier mesh 706. When it is necessary to clean the coarse barrier mesh 706, the mounting tube 703 is rotated in the opposite direction to disengage the first threaded connecting ring 704 from the first threaded groove 702. At the same time, the connecting adsorption groove 705 separates from the permanent magnet 708, making it easy to quickly remove the mounting tube 703 for cleaning or replacement.

[0028] The self-cleaning filter structure 90 includes a mounting ring 901, which is fixedly disposed inside the tube 701 and located on the left side. Several springs 902 are fixedly connected to the right side wall of the mounting ring 901, and a fine filter screen 903 is fixedly connected to the right side wall of the several springs 902.

[0029] The mounting ring 901 is fixedly connected to the inner wall of the tube 701, providing a stable support base for the spring 902. Several springs 902 are evenly distributed between the mounting ring 901 and the fine filter screen 903, suspending the fine filter screen 903 inside the tube 701, so that the fine filter screen 903 is in a state of elastic movement. When the rainwater that has passed through the coarse filter continues to flow downward and impacts the fine filter screen 903, the fine filter screen 903 is subjected to the impact force of the water flow, which causes the spring 902 to undergo elastic deformation (compression or stretching). The change in the impact force of the water flow (such as the fluctuation of rainfall) will cause the spring 902 to reciprocate and expand, thereby causing the fine filter screen 903 to vibrate. This vibration can effectively prevent fine impurities (such as fine sand and fibers) from continuously adhering to the surface of the fine filter screen 903, laying the foundation for the subsequent shaking off and collection of impurities.

[0030] The garbage collection mechanism 80 includes a connection hole 801, which is located on the left side of the drain overflow port body 60. A sleeve 803 is fixed inside the connection hole 801. An installation groove 802 is also provided around the connection hole 801. A threaded connection box 809 is fixedly connected inside the installation groove 802. A second threaded connection ring 805 is threadedly connected inside the threaded connection box 809. A top plate 804 is provided on the top of the second threaded connection ring 805. A connecting rope 808 is provided at the center of the bottom of the top plate 804. A collection box 807 is provided at the bottom of the connecting rope 808. An installation pipe 806 is also provided outside the collection box 807. The installation pipe 806 is fixedly installed inside the bottom of the pipe body 701 and is located on the right side of the bottom of the fine filter screen 903.

[0031] The connecting hole 801 provides a channel for the operation of the garbage collection mechanism 80. The sleeve 803 inside it can protect and guide the connecting rope 808, preventing the connecting rope 808 from being damaged by friction with the edge of the connecting hole 801. The threaded connecting box 809 in the mounting groove 802 is threadedly engaged with the second threaded connecting ring 805 at the bottom of the top plate 804, which can fix the top plate 804 to the top of the connecting hole 801. Then, the collecting box 807 is stably suspended inside the pipe body 701 by the connecting rope 808. The mounting pipe 806 is fixed to the bottom right side of the fine filter screen 903. Its inner wall is adapted to the collecting box 807, which not only provides vertical guidance for the collecting box 807 to prevent the collecting box 807 from shifting under the impact of water flow, but also guides the impurities shaken off from the fine filter screen 903 to fall accurately into the collecting box 807, ensuring that the impurities will not be scattered in other areas inside the pipe body 701.

[0032] Example 2 Based on the above embodiments, this embodiment also makes the following improvements, such as... Figures 2 to 6 As shown, when the fine filter screen 903 is impacted by water flow, it will generate strong vibration through the spring 902, which will shake off the dust clogging the outer surface of the fine filter screen 903 into the collection box 807 located inside the installation pipe 806.

[0033] When rainwater flows through the fine filter screen 903, the mesh of the fine filter screen 903 intercepts small impurities (such as fine sand, dust, short fibers, etc.), causing the impurities to adhere to its outer surface. At the same time, the water flow generates a continuous impact force on the fine filter screen 903, which is transmitted to the spring 902, causing the spring 902 to undergo elastic deformation. Due to fluctuations in rainfall (such as short-term increases or decreases in rainfall), the impact force of the water flow changes accordingly. Under the action of its own elastic restoring force, the spring 902 reciprocates and expands, causing the fine filter screen 903 to generate high-frequency vibration. Under the action of vibration, the impurities attached to the surface of the fine filter screen 903 separate from the mesh surface and fall downwards under the action of gravity. The installation pipe 806 is located on the bottom right side of the fine filter screen 903. Under the weak guidance of gravity and water flow, the falling impurities enter the interior of the installation pipe 806 and finally fall into the collection box 807, realizing the directional collection of impurities and preventing impurities from re-entering the water flow and causing secondary blockage.

[0034] When the top plate 804 is rotated, the second threaded connecting ring 805 will disengage from the threaded connecting box 809 and drive the connecting rope 808 to pull the collection box 807 to the outside, thereby realizing the processing of the garbage inside the collection box 807.

[0035] When impurities accumulate to a certain amount inside the collection box 807, rotating the top plate 804 causes the second threaded connecting ring 805 at its bottom to rotate synchronously, gradually disengaging the second threaded connecting ring 805 from the internal threads of the threaded connecting box 809. As the top plate 804 moves upward, the connecting rope 808 is pulled up synchronously, and the collection box 807 slides upward along the inner wall of the installation pipe 806 under the traction of the connecting rope 808 (the guiding effect of the installation pipe 806 ensures that the collection box 807 will not tilt or get stuck). Continuing to pull the top plate 804, the collection box 807 is brought out to the outside through the connecting hole 801, at which point the impurities inside the collection box 807 can be directly poured out and cleaned. After cleaning, the collection box 807 is put back into the installation pipe 806, and the top plate 804 is rotated in the opposite direction to make the second threaded connecting ring 805 engage with the threads of the threaded connecting box 809, thus completing the reset. The entire process does not require disassembling the pipe 701 or damaging the roof structure, making the operation convenient and avoiding water-related work.

[0036] Workflow Staged drainage: During normal rainfall, rainwater is discharged first through the inner wall drainage pipe 30 of the inner wall 20; when the rainfall exceeds the main drainage load, the rainwater gathers at the top of the roof wall 10 and spreads to the outside. The guide slope 50 of the outer wall 40 will gather the dispersed rainwater to the drainage overflow outlet body 60 and enter the overflow pipe mechanism 70.

[0037] Primary filtration stage: After rainwater enters the pipe body 701 of the overflow pipe mechanism 70, it first flows through the coarse barrier net 706 in the installation pipe 703 to intercept large-volume impurities such as leaves and branches (the installation pipe 703 is fixed by "thread + magnetic attraction" to ensure stable filtration), and the filtered rainwater continues to flow downward.

[0038] Deep filtration and self-cleaning stage: Rainwater impacts the fine filter 903 of the self-cleaning filter structure 90, and the fine filter 903 intercepts tiny impurities such as fine sand and fibers; at the same time, the impact force of the water flow drives the spring 902 to reciprocate and extend, causing the fine filter 903 to vibrate at high frequency, shaking off the impurities attached to the surface.

[0039] Impurity directional collection stage: The shaken impurities fall due to gravity and fall precisely into the collection box 807 of the garbage cleaning mechanism 80 through the installed pipe 806 (directional guide), avoiding the impurities from being scattered inside the pipe 701 or flowing downstream with the water.

[0040] Convenient cleaning stage: When the impurities in the collection box 807 accumulate to a certain amount, rotate the top plate 804 to disengage the second threaded connecting ring 805 from the threaded connecting box 809, and pull the collection box 807 to the outside along the installation pipe 806 via the connecting rope 808. After cleaning the impurities, reset the box to complete the entire process.

[0041] It should be noted that the descriptions of each embodiment in the above embodiments have different focuses. For parts that are not described in detail in a certain embodiment, please refer to the relevant descriptions in other embodiments.

[0042] Although preferred embodiments of the present invention have been described, those skilled in the art, upon learning the basic inventive concept, can make other changes and modifications to these embodiments. Therefore, the appended claims are intended to be interpreted as including the preferred embodiments as well as all changes and modifications falling within the scope of the present invention.

[0043] Obviously, those skilled in the art can make various modifications and variations to this utility model without departing from its spirit and scope. Therefore, if these modifications and variations fall within the scope of the claims of this utility model and their equivalents, this utility model also intends to include these modifications and variations.

Claims

1. A novel roof rainwater drainage overflow outlet device, characterized in that, The roof wall (10) includes an inner wall (20) on the right side of the top of the roof wall (10), an inner wall drain pipe (30) is provided on the right side wall of the inner wall (20), an outer wall (40) is also provided on the top of the roof wall (10), a guide slope (50) is provided on both sides inside the outer wall (40), a drainage overflow body (60) is provided inside the outer wall (40) and between the two guide slopes (50), an overflow pipe mechanism (70) is provided inside the drainage overflow body (60), and the overflow pipe mechanism (70) is used to discharge the overflowed water and filter the water when it is discharged. The overflow pipe mechanism (70) is also provided with a garbage cleaning mechanism (80) on the left side. The overflow pipe mechanism (70) is also provided with a self-cleaning filter structure (90) on the left side inside. The self-cleaning filter structure (90) is used to further filter the garbage inside the overflow pipe mechanism (70), and the filtered garbage will enter the garbage cleaning mechanism (80). The garbage cleaning mechanism (80) is used to pull up and then take the garbage out for cleaning.

2. The novel roof rainwater drainage overflow device according to claim 1, characterized in that, The overflow pipe mechanism (70) includes a pipe body (701), which is installed inside the drain overflow port body (60). A first threaded connection groove (702) is provided on the top outer wall of the pipe body (701). A fixing ring (707) is also fixedly connected inside the pipe body (701) and near the top. A permanent magnet (708) is provided on the top of the fixing ring (707).

3. The novel roof rainwater drainage overflow device according to claim 2, characterized in that, The overflow pipe mechanism (70) also includes an installation pipe (703), which is located inside the pipe body (701). The bottom of the installation pipe (703) is also provided with a connecting adsorption groove (705). The interior of the installation pipe (703) is also provided with a coarse barrier mesh (706). The connecting adsorption groove (705) is inserted into the permanent magnet (708) to form a fixed connection. The top of the installation pipe (703) is also provided with a first threaded connecting ring (704), which is inserted into the first threaded connecting groove (702) for use.

4. The novel roof rainwater drainage overflow device according to claim 3, characterized in that, The self-cleaning filter structure (90) includes an installation ring (901), which is fixedly disposed inside the tube body (701) and located on the left side. Several springs (902) are fixedly connected to the right side wall of the installation ring (901), and fine filter screens (903) are fixedly connected to the right side wall of the several springs (902).

5. The novel roof rainwater drainage overflow device according to claim 4, characterized in that, The garbage cleaning mechanism (80) includes a connecting hole (801), which is located on the left side of the drain overflow body (60). A sleeve (803) is fixed inside the connecting hole (801). An installation groove (802) is also provided around the connecting hole (801). A threaded connecting box (809) is fixedly connected inside the installation groove (802). A second threaded connecting ring (805) is threaded inside the threaded connecting box (809). A top plate (804) is provided on the top of the second threaded connecting ring (805). A connecting rope (808) is provided at the center of the bottom of the top plate (804). A collection box (807) is provided at the bottom of the connecting rope (808). An installation pipe (806) is also provided outside the collection box (807). The installation pipe (806) is fixedly installed at the bottom of the pipe body (701) and located on the right side of the bottom of the fine filter screen (903).

6. The novel roof rainwater drainage overflow device according to claim 5, characterized in that, When the fine filter screen (903) is impacted by water flow, it will generate strong vibration through the spring (902), which will shake off the dust clogging the outer surface of the fine filter screen (903) into the collection box (807) located inside the installation pipe (806).

7. The novel roof rainwater drainage overflow device according to claim 6, characterized in that, When the top plate (804) is rotated, the second threaded connecting ring (805) will disengage from the threaded connecting box (809) and drive the connecting rope (808) to pull the collection box (807) to the outside, thereby realizing the treatment of the garbage inside the collection box (807).

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