A rainwater downpipe disconnection energy dissipation device

Abstract

This invention discloses a rainwater downpipe disconnection and energy dissipation device in the field of building drainage and roof rainwater resource utilization technology. The device includes a wall-mounted plate; an equipment shell fixedly connected to one side of the wall-mounted plate; a disconnected rainwater downpipe located at the upper end of the equipment shell; and a mounting bracket with an opening inside the equipment shell, into which the disconnected rainwater downpipe is inserted. Through a dual-channel diversion design of a planting trough and an energy dissipation chamber, adaptive regulation to different rainfall intensities is achieved. During light to moderate rainfall, rainwater is preferentially directed into the planting trough for passive green plant irrigation, avoiding water waste. During heavy rainfall, rainwater enters the energy dissipation chamber and undergoes multi-stage physical energy dissipation to reduce impact kinetic energy, effectively preventing high-speed water flow from eroding and damaging the ground and sponge infrastructure.

Description

Technical Field

[0001] This invention relates to the field of building drainage and roof rainwater resource utilization technology, and in particular to a rainwater downpipe disconnection and energy dissipation device. Background Technology

[0002] Roof rainwater is discharged through external wall downpipes, which is a standard design feature of building drainage systems. With the advancement of sponge city construction, there is a need for source reduction, resource utilization, and ecological treatment of roof rainwater, leading to the development of downpipe disconnection technology.

[0003] Under heavy rainfall conditions, the roof has a large catchment area, and rainwater forms a full-pipe pressure flow in the downpipe. The flow rate is fast and the impact force is strong. Traditional straight-through downpipes have no energy dissipation structure at the end, and high-speed rainwater directly washes over the ground. Long-term use will cause soil erosion, hardening, potholes and damage to the ground below the downpipe. If there are permeable paving, sunken green space, rainwater flower beds and other surface sponge facilities below, the high-speed water flow will directly destroy the structure of the facilities, wash away the planting soil layer, damage the integrity of the sponge facilities, and lose the function of rainwater infiltration and storage. Some simple energy dissipation pipe fittings can only achieve single deceleration and have no diversion and overflow structure. During extreme rainstorms, the flow rate is overloaded, which can easily lead to rainwater backflow and downpipe pressure damage.

[0004] Under light to moderate rainfall conditions, rainwater from the roof mostly flows down the downpipes at low speeds, such as wall-mounted spiral flow and water film flow. This type of small amount of rainwater is small in volume and slow in velocity. After being discharged directly, it evaporates or is lost quickly and cannot be collected and utilized, resulting in a waste of rainwater resources. Conventional rainwater downpipes do not have supporting planting and greening structures, and the building facade is monotonous. If additional vertical greening devices are installed, a separate irrigation system is required. Manual irrigation is costly, water resource utilization is low, and the amount of irrigation water for green plants is difficult to control, which can easily lead to problems such as drying out or waterlogging and root rot.

[0005] In addition, existing rainwater downpipe terminal devices generally suffer from poor installation stability. They lack wall-mounted fixing structures and ground leveling structures, making them prone to displacement, shaking, or even detachment under long-term rainwater impact. Furthermore, they cannot accommodate both pre-installation in new buildings and renovation of existing downpipes, and their applicable scenarios are limited. They cannot simultaneously meet the multiple needs of rainwater energy dissipation and scour prevention, small-scale rainwater reuse, ecological vertical greening, and stable installation, which contradicts the construction concept of sponge cities: "retention, storage, purification, utilization, and drainage" and ecological livability. Summary of the Invention

[0006] To address the shortcomings of existing technologies, this invention aims to solve the problems of excessively fast rainwater flow during heavy rainfall, the lack of energy dissipation structures, and the resulting erosion and damage to the ground and sponge city infrastructure. Traditional straight-through rainwater downpipes lack energy dissipation and buffer structures, allowing high-speed, high-pressure rainwater to directly impact the ground during heavy rainfall. Long-term erosion will lead to soil hardening, potholes, and damage. If permeable paving, sunken green spaces, or rainwater flower beds are located below the downpipe, the high-speed water flow will directly destroy the structure of these facilities, wash away the planting soil, and completely destroy the integrity of the sponge city infrastructure, causing it to lose its rainwater infiltration and storage functions. Therefore, this invention provides a rainwater downpipe disconnection energy dissipation device.

[0007] The objective of this invention is achieved as follows:

[0008] To achieve the above objectives, the present invention provides the following technical solution:

[0009] A rainwater downpipe disconnection energy dissipation device, comprising:

[0010] Wall fixing plate;

[0011] The equipment housing is fixedly connected to one side of the wall mounting plate;

[0012] Disconnected rainwater downpipe, the disconnected rainwater downpipe is located at the upper end of the equipment casing;

[0013] A mounting bracket with an opening is installed inside the equipment housing, and the disconnected rainwater riser is inserted into the mounting bracket with an opening.

[0014] A planting trough, wherein the planting trough is located at the upper end of the equipment casing;

[0015] Drainage holes are provided on the lower inner wall of the planting trough.

[0016] An energy dissipation chamber is located on the lower side of the planting trough;

[0017] The water outlet is located on the surface of the equipment casing;

[0018] Conical block B, which is fixedly connected to the lower end of the equipment housing;

[0019] A drainage hole is provided on the upper side of the conical block B;

[0020] A rainwater pipe, the rainwater pipe being located at the lower end of the conical block B;

[0021] An energy dissipation component is installed in an energy dissipation chamber, which effectively reduces the speed at which rainwater falls.

[0022] A filter assembly is installed inside the disconnected rainwater downpipe, which initially filters out leaf debris when rainwater falls.

[0023] As a preferred embodiment of the present invention, the energy dissipation component includes a swirling energy dissipation groove, a conical block A, a buffer groove, and a support rod. The swirling energy dissipation groove is located below the seepage hole and communicates with the seepage hole. The conical block A is located in the energy dissipation chamber. The buffer groove is opened on the surface of the conical block A. The support rod is fixedly connected between the conical block A and the inner wall of the equipment housing.

[0024] In a preferred embodiment of the present invention, the filtration device includes a conical filter bucket, a fixing block, a threaded groove, a limiting cover, a sliding groove, and a fixing groove. The sliding groove is located at the lower end of the disconnected rainwater downpipe, and the fixing groove is located inside the disconnected rainwater downpipe. The sliding groove and the fixing groove are interconnected. The conical filter bucket is located inside the disconnected rainwater downpipe. The fixing block is fixedly connected to the circumferential surface of the conical filter bucket. The fixing block slides into the fixing groove through the sliding groove. The threaded groove is fixedly connected to the lower end of the conical filter bucket. The limiting cover is located at the lower end of the conical filter bucket, and the limiting cover is threadedly engaged with the threaded groove.

[0025] As a preferred embodiment of the present invention, a filter cage is fixedly connected inside the outer shell of the device. The filter cage is located in the energy dissipation chamber. The filter cage is fitted onto the circumferential surface of the conical block A, and there is a gap between the filter cage and the conical block A.

[0026] In a preferred embodiment of the present invention, the energy dissipation chamber is provided with a filter plate, which is located on the lower side of the filter cage.

[0027] As a preferred embodiment of the present invention, the lower end of the conical block B is provided with a leveling base, and the leveling base is connected to the conical block B through a movable hinge.

[0028] As a preferred embodiment of the present invention, the wall fixing plate is provided with at least two sets of symmetrically distributed bolt countersunk holes, and an expansion bolt passes through each set of bolt countersunk holes. The expansion bolt presses the wall fixing plate perpendicular to the ground and onto the wall surface.

[0029] As a preferred embodiment of the present invention, the outer shell of the device is made of weather-resistant modified engineering plastic, and the inner wall of the outer shell is coated with an epoxy resin anti-corrosion layer.

[0030] As a preferred embodiment of the present invention, the lower surface of the leveling base is provided with an anti-slip rubber pad, and the lower surface of the anti-slip rubber pad is provided with a serrated anti-slip texture.

[0031] As a preferred embodiment of the present invention, the inner wall of the planting trough is provided with an annular stepped surface.

[0032] Compared with the prior art, the beneficial effects of the present invention are as follows:

[0033] 1. Through the dual-channel diversion design of the planting trough and the energy dissipation chamber, adaptive regulation is achieved for different rainfall intensities. During light to moderate rainfall, rainwater is preferentially introduced into the planting trough and slowly soaks the planting soil through the infiltration holes, realizing passive green plant irrigation without the need for manual intervention or external water sources. This fundamentally avoids the waste of water resources caused by the direct discharge of small amounts of rainwater. During heavy rainfall, rainwater rushes directly into the energy dissipation chamber and passes through a multi-stage physical energy dissipation structure, including a swirling energy dissipation trough, cone block A, and buffer trough. The impact kinetic energy is reduced by the internal collision of the water flow, eddy current buffering, and changes in flow direction. This effectively prevents high-speed water flow from eroding and damaging the ground soil, permeable pavement, and sunken green spaces. The entire switching process relies entirely on the flow state and gravity of the rainwater itself, without the need for any external power or electrical control equipment, ensuring stable and reliable operation.

[0034] 2. The integrated overload overflow protection, dual fixing structure, and modular design significantly improve operational safety, installation stability, and scenario adaptability. The overflow port can promptly divert and relieve pressure under extreme rain conditions, preventing water accumulation and blockage inside the device and rainwater backflow into the riser, effectively reducing the risk of riser pressure damage. The wall fixing plate is rigidly connected to the building's exterior wall via expansion bolts, and the adjustable base can be flexibly fine-tuned according to the ground slope via movable hinges, achieving dual stable fixing to the wall and ground. Combined with anti-slip rubber pads, it further enhances impact resistance and displacement resistance, ensuring that the device does not shake or tilt during long-term use. Attached Figure Description

[0035] To more clearly illustrate the technical solutions in the embodiments of the present invention 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 embodiments of the present invention. For those skilled in the art, other drawings can be obtained based on the provided drawings without creative effort.

[0036] Figure 1 This is a front perspective view of the present invention.

[0037] Figure 2 This is a cross-sectional perspective view of the present invention.

[0038] Figure 3 This is an enlarged view of the disconnected rainwater downpipe and filter cage of the present invention.

[0039] Figure 4 This is an exploded view of the disconnected rainwater downpipe of the present invention.

[0040] Figure 5 This is a three-dimensional cross-sectional view of the disconnected rainwater downpipe of the present invention.

[0041] Figure 6 This is a three-dimensional cross-sectional view of the filter cage of the present invention.

[0042] 1. Disconnected rainwater downpipe; 2. Wall fixing plate; 3. Equipment casing; 4. Water outlet; 5. Leveling base; 6. Planting trough; 7. Mounting bracket with opening; 8. Drainage hole; 9. Energy dissipation chamber; 901. Rotary energy dissipation trough; 902. Conical block A; 903. Buffer trough; 904. Support rod; 10. Conical block B; 11. Rainwater pipe; 12. Drainage hole; 13. Filter cage; 14. Filter plate; 15. Conical filter bucket; 16. Fixing block; 17. Threaded groove; 18. Limiting cover; 19. Sliding groove; 20. Fixing groove. Detailed Implementation

[0043] The technical solutions of the embodiments of the present invention will be clearly and completely described below with reference to the accompanying drawings. Obviously, the described embodiments are only some embodiments of the present invention, and not all embodiments. Based on the embodiments of the present invention, all other embodiments obtained by those skilled in the art without creative effort are within the scope of protection of the present invention.

[0044] Please see Figures 1-6 The present invention provides the following technical solutions:

[0045] A rainwater downpipe disconnection energy dissipation device, comprising:

[0046] Wall fixing plate 2;

[0047] Equipment housing 3 is fixedly connected to one side of wall mounting plate 2;

[0048] Disconnect the rainwater downpipe 1, which is located at the upper end of the equipment casing 3;

[0049] The mounting bracket 7 with the opening is located inside the equipment housing 3, and the disconnected rainwater riser 1 is inserted into the mounting bracket 7 with the opening.

[0050] Planting trough 6 is located at the upper end of the equipment casing 3;

[0051] Drainage hole 8 is located on the lower inner wall of planting trough 6;

[0052] Energy dissipation chamber 9 is located below planting trough 6;

[0053] Water outlet 4 is located on the surface of the equipment housing 3;

[0054] Conical block B10 is fixedly connected to the lower end of the equipment housing 3;

[0055] Drainage hole 12 is provided on the upper side of the conical block B10;

[0056] Rainwater pipe 11, located at the lower end of conical block B10;

[0057] Energy dissipation components are installed inside energy dissipation chamber 9, which effectively reduce the speed of rainwater falling.

[0058] The filter assembly is located inside the disconnected rainwater downpipe 1. When rainwater falls, it initially filters out leaf debris.

[0059] In a specific embodiment of the present invention, when light to moderate rainfall occurs, the rainwater collected on the roof falls through the disconnected rainwater downpipe 1. At this time, the rainwater flow velocity is relatively slow, mostly in the form of a spiral flow or water film flow. The rainwater first passes through a filter component installed in the disconnected rainwater downpipe 1. This filter component can initially intercept and filter out large-particle impurities such as leaves and branches falling with the rainwater, preventing subsequent channel blockage. The filtered rainwater continues to fall, but does not directly enter the energy dissipation chamber 9. The rainwater is smoothly introduced into the planting trough 6 from the connection gap between the disconnected rainwater downpipe 1 and the mounting bracket with opening 7. The planting trough 6 is pre-filled with planting soil and planted with climbing green plants. The rainwater slowly soaks the planting soil, providing continuous, unpowered, and passive irrigation for the green plants. When the soil in the planting trough 6 reaches saturation, excess rainwater slowly seeps out through the seepage holes 8 on the lower inner wall of the planting trough 6 and enters the energy dissipation chamber 9 below. The kinetic energy of the small amount of rainwater entering the energy dissipation chamber 9 has been significantly weakened by the multi-layer buffering process, and it is finally discharged smoothly through the outlet 4 on the surface of the equipment shell 3. If it is heavy rain and fills the entire area above the cone block B10, some rainwater will be collected through the drainage hole 12 into the rainwater pipe 11 and discharged, and guided to the ground sponge facility, realizing the full utilization of small amounts of rainwater resources and avoiding the ineffective waste of water resources. When heavy rainfall occurs, the rainwater flow increases sharply, forming a high-speed pressure flow in the disconnected rainwater riser 1. The high-speed water flow has great impact kinetic energy. At this time, the rainwater quickly... The rainwater riser 1 is filled and flows directly into the energy dissipation chamber 9 below. The energy dissipation components inside the energy dissipation chamber 9 then activate. These components may include multi-stage staggered baffles, guide cones, vortex generators, and other structures. High-speed rainwater undergoes violent collisions inside the energy dissipation chamber 9, generating vortices and causing abrupt changes in the cross-sectional area of ​​the flow channel. This physically converts the vertical impact kinetic energy of the water flow into internal energy and laterally dispersed kinetic energy, thereby rapidly reducing the water flow velocity and its impact on the structures below. After sufficient energy dissipation in the energy dissipation chamber 9, the flow velocity of the rainwater has dropped to a safe range. At this point, the water flow is gentle and will not cause scouring damage to downstream facilities. The dissipated rainwater collects at the bottom of the equipment casing 3, with part of it being discharged directly through the outlet 4 and the other part being discharged through the cone. The drainage hole 12 on the upper side of block B10 enters the rainwater pipe 11, and finally flows safely and smoothly into permeable paving, sunken green space, or rainwater flower bed and other sponge facilities. In the event of extreme rainstorms, if the instantaneous flow of rainwater entering the energy dissipation chamber 9 exceeds its maximum energy dissipation capacity, in order to prevent the internal water pressure from rising or even backflowing into the disconnected rainwater riser 1, this device is also equipped with overload overflow protection. Excess rainwater will bypass directly into the downstream rainwater pipe through a dedicated overflow port, achieving rapid diversion and pressure relief. This effectively reduces the pressure risk inside the disconnected rainwater riser 1, prevents pipe damage or leakage due to excessive pressure, ensures the stability and safety of the entire drainage system under extreme weather conditions, and achieves precise adaptation to different rainfall intensities.Compared with conventional straight-through rainwater downpipes or simple energy dissipation pipes in existing technologies, this invention simultaneously solves multiple technical problems such as erosion damage from heavy rainfall, waste of resources during light to medium rainfall, unstable installation, poor compatibility with new and old buildings, and limited functionality. This device integrates rainwater energy dissipation, small-scale rainwater collection and irrigation, vertical greening, overload overflow protection, and stable installation into one unit, achieving the dual goals of power-free, maintenance-free, highly efficient, and safe rainwater management and ecological greening, demonstrating significant advantages.

[0060] Please refer to the details. Figures 1-6 The energy dissipation assembly includes a swirling energy dissipation groove 901, a conical block A902, a buffer groove 903, and a support rod 904. The swirling energy dissipation groove 901 is located below the seepage hole 8 and communicates with the seepage hole 8. The conical block A902 is located inside the energy dissipation chamber 9. The buffer groove 903 is opened on the surface of the conical block A902. The support rod 904 is fixedly connected between the conical block A902 and the inner wall of the equipment housing 3.

[0061] In this embodiment: After rainwater flows into the energy dissipation chamber 9 through the infiltration holes 8, it first enters the swirling energy dissipation channel 901. The swirling energy dissipation channel 901 adopts a spiral or annular groove structure, forcing the water flow to swirl along the channel. The initial kinetic energy of the water flow is consumed by centrifugal force and friction with the wall surface. Subsequently, the water flow falls and impacts the top of the conical block A902. The conical surface of the conical block A902 evenly disperses the vertically falling water flow in all directions, further reducing the impact force. When the dispersed water flow along the surface of the conical block A902, it enters multiple radial or... Within the spirally distributed buffer trough 903, the buffer trough 903 continuously consumes the remaining kinetic energy by changing the direction of water flow, increasing the flow length, and creating local eddies. The support rod 904 not only serves to fix the conical block A902, but also obstructs the water flow, promoting water flow breakup and energy dissipation. Through the above-mentioned multi-stage energy dissipation process of swirling, impact, dispersion, and buffering, the impact kinetic energy of high-speed rainwater is efficiently converted into internal energy and heat dissipation, thereby achieving stable outflow. There are gaps between the support rods 904, allowing rainwater to fall smoothly.

[0062] Please refer to the details. Figures 1-6 The filtration device includes a conical filter bucket 15, a fixing block 16, a threaded groove 17, a limiting cover 18, a sliding groove 19, and a fixing groove 20. The sliding groove 19 is located at the lower end of the disconnected rainwater downpipe 1, and the fixing groove 20 is located inside the disconnected rainwater downpipe 1. The sliding groove 19 and the fixing groove 20 are designed to communicate with each other. The conical filter bucket 15 is located inside the disconnected rainwater downpipe 1. The fixing block 16 is fixedly connected to the circumferential surface of the conical filter bucket 15. The fixing block 16 slides into the fixing groove 20 through the sliding groove 19. The threaded groove 17 is fixedly connected to the lower end of the conical filter bucket 15. The limiting cover 18 is located at the lower end of the conical filter bucket 15, and the limiting cover 18 is threadedly engaged with the threaded groove 17.

[0063] In this embodiment: During installation, the fixing block 16 is aligned with the sliding groove 19 and pushed upwards until the fixing block 16 reaches the entrance of the fixing groove 20. Then, the conical filter bucket 15 is rotated to make the fixing block 16 snap into the fixing groove 20, thereby achieving quick locking of the conical filter bucket 15. The conical filter bucket 15 is composed of multiple fan-shaped filter plates arranged in a circumferential direction, with a predetermined width of filter gap between each pair of adjacent filter plates. When multiple filter plates are assembled into a complete conical bucket structure, the threaded groove 17 is thus... The threaded sections at the lower ends of each filter element are spliced ​​together to form a complete threaded column. Then, the limiting cover 18 is screwed onto the spliced ​​threaded groove 17, thereby firmly locking the multiple filter elements into a whole. At the same time, multiple small holes are provided below the limiting cover 18. These small holes serve as a secondary filtration structure, which can intercept fine impurities that are not blocked by the gaps in the conical filter bucket 15, while allowing water to flow smoothly. When it is necessary to clean impurities, simply remove the limiting cover 18, and the multiple filter elements will automatically disperse for thorough cleaning, significantly reducing maintenance difficulty.

[0064] Please refer to the details. Figures 1-6 A filter cage 13 is fixedly connected inside the outer casing 3 of the equipment. The filter cage 13 is located inside the energy dissipation chamber 9. The filter cage 13 is fitted onto the circumferential surface of the conical block A902, and there is a gap between the filter cage 13 and the conical block A902.

[0065] In this embodiment, the interior of the filter cage 13 forms a hollow cavity. Activated carbon, zeolite, ceramsite, quartz sand, or other filter materials with adsorption and purification functions can be selectively filled into this cavity according to the actual water quality and water treatment requirements. When rainwater falls after being initially slowed down by the energy dissipation component, the water flow must first enter the cage through the side wall filter holes of the filter cage 13, then pass through the filled activated carbon or other filter layers, and finally flow out from the lower end or side wall of the filter cage 13. This device is used for multiple sets of equipment. If it is the last set of filter cages 13, there is no need to load activated carbon or other filter materials.

[0066] Please refer to the details. Figures 1-6 The energy dissipation chamber 9 is equipped with a filter plate 14, which is located on the lower side of the filter cage 13.

[0067] In this embodiment: after rainwater passes through the conical filter bucket 15 and the filter cage 13 in sequence, it is then finely filtered by the filter plate 14. The filter plate 14 is used to intercept the fine particles that remain in the water after the first two stages of filtration, further ensuring the quality of the effluent and preventing fine particles from entering the downstream sponge facility and causing blockage of the surface soil pores, thereby extending the service life of the sponge facility.

[0068] Please refer to the details. Figures 1-6 The lower end of the conical block B10 is provided with a leveling base 5, which is connected to the conical block B10 via a movable hinge.

[0069] In this embodiment, the movable hinge adopts a ball joint hinge, allowing the leveling base 5 to be adjusted in multiple directions relative to the conical block B10. At the installation site, when facing uneven or sloping ground, workers can rotate or swing the leveling base 5 to ensure its lower surface is fully in contact with the ground, thus ensuring the overall verticality of the equipment casing 3. After leveling, the angle of the leveling base 5 can be fixed by tightening the lock nut or set screw. This structure effectively solves the problems of installation tilting, uneven stress, and easy tipping after long-term use caused by uneven ground in traditional devices.

[0070] Please refer to the details. Figures 1-6 The wall fixing plate 2 has at least two sets of symmetrically distributed bolt countersunk holes, and an expansion bolt passes through each set of bolt countersunk holes. The expansion bolt presses the wall fixing plate 2 perpendicular to the ground and onto the wall surface.

[0071] In this embodiment: During installation, holes are first drilled at predetermined positions on the exterior wall of the building. Then, the wall fixing plate 2 is pressed tightly against the wall surface, and the expansion bolts are inserted into the wall holes through the bolt countersunk holes. The nuts are tightened to expand and tension the expansion bolts in the wall holes, thereby pressing the wall fixing plate 2 perpendicular to the ground onto the wall surface. The design of the bolt countersunk holes ensures that the bolt heads are completely sunk into the holes and do not protrude from the plate surface, which is both aesthetically pleasing and avoids scratches. The symmetrically distributed at least two sets of bolts can provide balanced fixing force, effectively resisting the vertical shear force and lateral tensile force generated by rainwater impact, ensuring the long-term stability of the device.

[0072] Please refer to the details. Figures 1-6 The outer casing 3 is made of weather-resistant modified engineering plastic, and the inner wall of the outer casing 3 is coated with an epoxy resin anti-corrosion layer.

[0073] In this embodiment, the outer shell 3 is made of weather-resistant modified engineering plastic, such as ABS, PC / ABS alloy or ASA resin, which has excellent resistance to ultraviolet aging, high and low temperature impact resistance and mechanical strength. It can be exposed to the outdoor environment for a long time without deformation or cracking. At the same time, the inner wall of the outer shell 3 is coated with an epoxy resin anti-corrosion layer. This anti-corrosion layer can resist the erosion of acidic substances or corrosive ions that may be carried in rainwater, prevent metal parts from rusting and corroding due to the humid environment, and further extend the overall service life of the device.

[0074] Please refer to the details. Figures 1-6 The lower surface of the leveling base 5 is provided with an anti-slip rubber pad, and the lower surface of the anti-slip rubber pad is provided with a serrated anti-slip texture.

[0075] In this embodiment: the lower surface of the anti-slip rubber pad is provided with serrated anti-slip texture. When the leveling base 5 contacts the ground, the anti-slip rubber pad can provide buffering and shock absorption, absorbing some of the vibration energy transmitted by rainwater impact. The serrated anti-slip texture increases the friction coefficient between the device and the ground, preventing the device from sliding or shifting under long-term water flow impact, and further enhancing the stability of the device.

[0076] Please refer to the details. Figures 1-6 The inner wall of the planting trough 6 is provided with an annular stepped surface.

[0077] In this embodiment, a porous partition with through holes can be placed on the step surface, forming a water storage layer below the partition, and planting soil is laid on top of the partition. The design of the ring-shaped step surface provides a more flexible modular option for green plant planting, allowing the planting trough 6 to be directly filled with soil for planting or used with standardized planting pots. At the same time, the step surface can also serve as the installation base for the water level control structure, preventing excessive water accumulation in the planting trough 6 due to blockage of the seepage holes 8, which could cause root rot of the green plants.

[0078] The workflow of this invention is as follows: During light to moderate rainfall, rainwater collected on the roof falls through the disconnected rainwater downpipe 1. At this time, the rainwater flow velocity is relatively slow, mostly exhibiting a spiral flow or water film flow. The rainwater first passes through a filter component located inside the disconnected rainwater downpipe 1. This filter component intercepts and filters out large-particle impurities such as leaves and branches falling with the rainwater, preventing subsequent channel blockage. The filtered rainwater continues to fall, preferentially passing through the planting trough 6 located at the upper end of the equipment casing 3. Specifically, rainwater is smoothly introduced into the planting trough 6 from the connection gap between the disconnected rainwater downpipe 1 and the mounting bracket with an opening 7. The planting trough 6 is pre-filled with planting soil and planted with greenery. The rainwater slowly soaks the planting soil, providing continuous, unpowered, and passive water for the greenery without human intervention. After the soil in the planting trough 6 reaches saturation, excess rainwater slowly seeps out through the seepage holes 8 on the lower inner wall of the planting trough 6 and enters the energy dissipation chamber 9 below. The kinetic energy of the small amount of rainwater entering the energy dissipation chamber 9 has been significantly weakened by the multi-layer buffering process. The energy dissipation components in the energy dissipation chamber 9 further dissipate the energy of the rainwater. Finally, the energy-dissipated rainwater is discharged smoothly through the outlet 4 on the surface of the equipment shell 3, or collected through the drainage hole 12 on the upper side of the conical block B10 to the rainwater pipe 11, and guided to the ground sponge facility to make full use of small amounts of rainwater resources. When heavy rainfall occurs, the rainwater flow increases sharply, forming a high-speed pressure flow in the disconnected rainwater riser 1. The water flow has great impact kinetic energy, and the rainwater quickly passes through the disconnected rainwater riser. Large-diameter impurities are intercepted by the filter components inside 1. Due to the extremely high water flow speed, only a very small amount of rainwater enters the planting trough 6, and most of the high-speed water flows directly into the energy dissipation chamber 9 below. The energy dissipation components inside the energy dissipation chamber 9 then start working. The high-speed rainwater undergoes violent collisions inside the energy dissipation chamber 9, generating eddies and abrupt changes in the cross-sectional area of ​​the flow channel. Through physical means, the vertical impact kinetic energy of the water flow is efficiently converted into internal energy and laterally dispersed kinetic energy, thereby rapidly reducing the water flow speed and its impact force on the structure below. After the rainwater has been fully dissipated by the energy dissipation chamber 9, the flow velocity has been reduced to a safe range. At this time, the water flow is gentle, and the dissipated rainwater collects at the bottom of the equipment shell 3. Part of it is discharged directly through the outlet 4, and the other part passes through the conical block. The drainage hole 12 on the upper side of B10 enters the rainwater pipe 11, and finally safely and smoothly discharges into permeable paving, sunken green space, or rainwater flower beds and other sponge facilities, fundamentally preventing high-speed water flow from eroding and damaging the ground soil and sponge facilities. If the rainwater flow entering the energy dissipation chamber 9 instantaneously exceeds the maximum energy dissipation capacity of the energy dissipation components, to prevent the internal water pressure from rising or even backflowing into the disconnected rainwater riser 1, the excess rainwater will bypass directly into the downstream rainwater pipe through a dedicated overflow port, achieving rapid diversion and pressure relief, effectively reducing the pressure risk inside the disconnected rainwater riser 1, and preventing pipe damage or leakage due to excessive pressure. During the entire operation, the device is rigidly connected to the building's exterior wall through expansion bolts on the wall fixing plate 2.The adjustable flat base 5 at the bottom connects to the conical block B10, and is finely adjusted according to the actual slope of the ground to ensure that the main body of the equipment casing 3 is upright and the force is evenly distributed. This double-fixing structure allows the device to remain stable even under long-term exposure to alternating high and low intensity rain, without shaking, shifting, or tilting.

[0079] The above description of the embodiments is only for the purpose of helping to understand the method and core ideas of the present invention. It should be noted that those skilled in the art can make several improvements and modifications to the present invention without departing from the principles of the present invention, and these improvements and modifications also fall within the protection scope of the claims of the present invention.

Claims

1. A rainwater downpipe disconnection and energy dissipation device, characterized in that: include: Wall fixing plate (2); Equipment housing (3), the equipment housing (3) is fixedly connected to one side of the wall fixing plate (2); Disconnected rainwater downpipe (1), the disconnected rainwater downpipe (1) is located at the upper end of the equipment casing (3); A mounting bracket (7) with an opening is provided inside the equipment housing (3), and the disconnected rainwater riser (1) is inserted into the mounting bracket (7). Planting trough (6), which is located at the upper end of the equipment casing (3); Drainage holes (8) are provided on the lower inner wall of the planting trough (6); Energy dissipation chamber (9), which is located on the lower side of planting trough (6); Water outlet (4), the water outlet (4) is opened on the surface of the equipment shell (3); Conical block B (10), which is fixedly connected to the lower end of the equipment housing (3); Drainage hole (12), the drainage hole (12) is opened on the upper side of the conical block B (10); Rainwater pipe (11), the rainwater pipe (11) is located at the lower end of the conical block B (10); Energy dissipation component, which is located in energy dissipation chamber (9), effectively reduces the speed of rainwater falling; The filter assembly is located inside the disconnected rainwater downpipe (1) and initially filters out leaf impurities when rainwater falls.

2. The rainwater downpipe disconnection and energy dissipation device according to claim 1, characterized in that: The energy dissipation assembly includes a swirling energy dissipation groove (901), a conical block A (902), a buffer groove (903), and a support rod (904). The swirling energy dissipation groove (901) is located below the seepage hole (8) and communicates with the seepage hole (8). The conical block A (902) is located inside the energy dissipation chamber (9). The buffer groove (903) is opened on the surface of the conical block A (902). The support rod (904) is fixedly connected between the conical block A (902) and the inner wall of the equipment housing (3).

3. The rainwater downpipe disconnection and energy dissipation device according to claim 2, characterized in that: The filtration device includes a conical filter bucket (15), a fixing block (16), a threaded groove (17), a limiting cover (18), a sliding groove (19), and a fixing groove (20). The sliding groove (19) is located at the lower end of the disconnected rainwater riser (1), and the fixing groove (20) is located inside the disconnected rainwater riser (1). The sliding groove (19) and the fixing groove (20) are designed to communicate with each other. The conical filter bucket (15) is located inside the disconnected rainwater riser (1). The fixing block (16) is fixedly connected to the circumferential surface of the conical filter bucket (15). The fixing block (16) slides into the fixing groove (20) through the sliding groove (19). The threaded groove (17) is fixedly connected to the lower end of the conical filter bucket (15). The limiting cover (18) is located at the lower end of the conical filter bucket (15), and the limiting cover (18) is threadedly engaged with the threaded groove (17).

4. The rainwater downpipe disconnection and energy dissipation device according to claim 3, characterized in that: A filter cage (13) is fixedly connected inside the outer shell (3) of the equipment. The filter cage (13) is located inside the energy dissipation chamber (9). The filter cage (13) is fitted onto the circumferential surface of the conical block A (902). There is a gap between the filter cage (13) and the conical block A (902).

5. The rainwater downpipe disconnection and energy dissipation device according to claim 4, characterized in that: The energy dissipation chamber (9) is equipped with a filter plate (14), which is located on the lower side of the filter cage (13).

6. The rainwater downpipe disconnection and energy dissipation device according to claim 5, characterized in that: The lower end of the conical block B (10) is provided with a leveling base (5), which is connected to the conical block B (10) by a movable hinge.

7. The rainwater downpipe disconnection and energy dissipation device according to claim 6, characterized in that: The wall fixing plate (2) has at least two sets of symmetrically distributed bolt countersunk holes, and an expansion bolt passes through each set of bolt countersunk holes. The expansion bolt presses the wall fixing plate (2) perpendicular to the ground onto the wall surface.

8. A rainwater downpipe disconnection and energy dissipation device according to claim 7, characterized in that: The outer shell (3) of the equipment is made of weather-resistant modified engineering plastic, and the inner wall of the outer shell (3) is coated with an epoxy resin anti-corrosion layer.

9. A rainwater downpipe disconnection and energy dissipation device according to claim 8, characterized in that: The lower surface of the leveling base (5) is provided with an anti-slip rubber pad, and the lower surface of the anti-slip rubber pad is provided with a serrated anti-slip texture.

10. A rainwater downpipe disconnection and energy dissipation device according to claim 9, characterized in that: The inner wall of the planting trough (6) is provided with an annular stepped surface.

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