Large-span roof siphon drainage system

Abstract

The present application relates to the field of roof siphon drainage, and discloses a large-span roof siphon drainage system.The system comprises a drainage channel, a drainage channel connector and a siphon drainage pipe; the drainage channel is connected by the drainage channel connector to form a drainage network; and the siphon drainage pipe is connected to the edge position of the drainage network.The area of the drainage network far from the siphon drainage pipe is provided with a leakage type siphon compensation device and a relay drainage device; the leakage type siphon compensation device is used to quickly drain the rainwater collected in the device into the drainage channel, and to push the infiltration water in the drainage channel to the siphon drainage pipe; and the relay drainage device is used to collect and agitate the infiltration water in the drainage channel, and to drive the infiltration water in the drainage channel to the siphon drainage pipe.The present application is used to solve the problem of slow drainage of the infiltration water in the middle area when the siphon drainage system is applied to a large-span roof, and to improve the overall drainage efficiency of the system.

Description

Technical Field

[0001] This invention relates to the field of roof slab siphon drainage, and more specifically, to a large-span roof slab siphon drainage system. Background Technology

[0002] Currently, siphonic rainwater drainage systems are widely used in green roofs. Typically, a layer of waterproof membrane is first laid on the building roof, garage roof, or road surface. Then, a water collection board is laid on the waterproof membrane, with drainage channels connecting the collection boards. Various types of drainage channels are connected to form a drainage network. Next, a layer of geotextile is laid on top of the collection boards and drainage channels. Finally, green soil is backfilled on top of the geotextile. Rainwater seeps into the soil, forming infiltration water that passes through the geotextile and enters the collection board. It then flows into the drainage channels through inlets on both sides of the channels, and is then transported along the drainage network to the building edge, finally entering a storage tank through siphonic drainage pipes connected to the drainage channels. This system mainly utilizes the siphonic drainage pipes connected to the end of the drainage network to create a siphon effect, quickly collecting the infiltration water into the storage tank, and then using it for subsequent irrigation and spraying of green vegetation, achieving both water supply and drainage while meeting energy-saving and environmental protection requirements.

[0003] In existing technologies, as buildings are increasingly characterized by large areas, large volumes, and large spans, the horizontal and vertical distances of green roof slabs are typically 50–100m. However, the siphon effect radius of the aforementioned siphon drainage pipes is generally between 10–15m. This means that, without external disturbance, the seepage water in the drainage boards and channels of the central area of ​​the green roof slab is difficult to drain promptly and effectively through the siphon drainage pipes located at its edges, resulting in low overall system drainage efficiency. Therefore, when existing siphon drainage systems are applied to large-span roof slabs, how to quickly and effectively drain rainwater from the central drainage boards and channels located far from the siphon drainage pipes has become a challenge in the industry. Summary of the Invention

[0004] The present invention aims to overcome at least one of the shortcomings of the prior art and provide a siphon drainage system for large-span roof slabs to solve the problem of water retention and slow discharge in the central area when the siphon drainage system is applied to large-span roof slabs, thereby improving the overall drainage efficiency of the system.

[0005] The technical solution adopted in this invention is a large-span roof slab siphon drainage system, including a drainage trough, a drainage trough connector, and a siphon drainage pipe. The drainage troughs are connected through the drainage trough connector to form a drainage network. The siphon drainage pipe is connected to the edge of the drainage network. A leakage-type siphon compensation device and a relay drainage device are provided in the area of ​​the drainage network away from the siphon drainage pipe. The leakage-type siphon compensation device is used to quickly discharge the rainwater collected inside into the drainage trough, pushing the seepage water inside the drainage trough towards the siphon drainage pipe. The relay drainage device is used to collect and agitate the seepage water inside the drainage trough, driving the seepage water inside the drainage trough towards the siphon drainage pipe.

[0006] Preferably, the leakage siphon compensation device includes a bucket lid, a collection bucket, and a filter basket, a water pipe, and a first siphon pipe disposed inside the collection bucket; rainwater enters the collection bucket from top to bottom through the bucket lid, the filter basket, and the water pipe, and the rainwater in the collection bucket enters the first siphon pipe through the first inlet. When the rainwater reaches the highest point of the first siphon pipe, the first siphon pipe generates a siphon effect and quickly discharges the rainwater from the first outlet located on the lower side wall of the collection bucket.

[0007] Furthermore, the lower part of the collection bucket is provided with a partition plate, which is used to divide the internal space of the collection bucket into an upper area and a lower area, wherein the upper area is used to store rainwater flowing in from the water pipe, and the lower area is used to install the pipe of the first siphon pipe.

[0008] Furthermore, the first siphon pipe includes an inlet section, a U-shaped section, a diversion section, and an outlet section connected in series. One end of the inlet section is the first inlet. The inlet section and the U-shaped section are located in the upper region of the collection bucket. The diversion section passes through the partition plate and diverts the rainwater in its pipe. The outlet section is located in the lower region of the collection bucket, and one end of the outlet section is the first outlet.

[0009] Furthermore, the filter basket is filled with filter media, which is used to filter impurities in rainwater; a second mesh grid is provided at the bottom of the filter basket, which is used to receive the filter media and support the bottom of the filter basket; the water pipe is provided with a second inlet and a second outlet, the second inlet is located at the bottom of the filter basket, and the second outlet is offset from the first siphon pipe.

[0010] Preferably, the relay drainage device includes a drive assembly, a second impeller body, a transmission assembly, and a connector assembly. The drive assembly is positioned above the connector assembly, and the second impeller body is disposed inside the connector assembly. The drive assembly and the second impeller body are linked through the transmission assembly. The connector assembly has a connector inlet and a connector outlet. The drive assembly drives the second impeller body to rotate via the transmission assembly. The second impeller body agitates the water flow within the connector assembly, accelerating its flow from the connector inlet to the connector outlet. Depending on the type of drive assembly, the device can be classified as a water-driven relay drainage device or an electric-driven relay drainage device.

[0011] Furthermore, the drive assembly is a first impeller body, including a first housing and a first impeller; the first housing is turbine-shaped, and has an inlet and an outlet; the first impeller is installed inside the first housing, and the shaft of the first impeller is connected to the transmission assembly; external water flows into the first housing through the inlet, driving the first impeller and its shaft to rotate, thereby causing the transmission assembly to rotate.

[0012] Furthermore, the second impeller body includes a second outer shell, a second rotor, and a second blade; the second outer shell is embedded inside the connector assembly and has an inlet and an outlet, the inlet communicating with the connector inlet and the outlet communicating with the connector outlet; the second rotor is installed inside the second outer shell, one end of the second blade is embedded in the circumferential surface of the second rotor, and the other end of the second blade touches the second outer shell; the transmission assembly drives the second rotor to rotate, and the second blade slides on the second outer shell, so that the water flow from the connector inlet is drawn into the second outer shell and accelerated to converge at the connector outlet.

[0013] Optionally, the relay drainage device further includes a second sleeve, which is sleeved on the outside of the transmission assembly; the inner cavity of the second sleeve connects the inner cavity of the first impeller body and the inner cavity of the second impeller body; after the external water flow drives the first impeller body to rotate, it enters the inner cavity of the second impeller body through the inner cavity of the second sleeve; the inner wall of the second sleeve is funnel-shaped and the surface is provided with spiral grooves or spiral protrusions for forming a spiral water flow.

[0014] Preferably, it also includes a drain adapter, which includes a drain pipe and a first connector and a second connector located at both ends thereto; the first connector and the second connector are used to connect the drain pipe and the drain trough respectively, and the two ends of the first connector and the second connector respectively include a first interface for connecting the drain trough and a second interface for connecting the drain pipe.

[0015] Compared with the prior art, the beneficial effects of the present invention are as follows:

[0016] The leakage-type siphon compensation device in this scheme achieves intermittent high-speed water flow from the first outlet by collecting rainwater in the collection tank and using the siphon effect of the first siphon pipe, without the need for an additional power device. Furthermore, the discharged high-speed rainwater disturbs the stagnant seepage water in the central area of ​​the large-span roof slab, accelerating its flow towards the siphon drainage pipe, thereby solving the problem of seepage water stagnation and slow discharge in the central area. At the same time, the high-speed rainwater also increases the water level in the central area. The potential energy difference between the central area and the edge position allows the siphon drainage pipe at the edge position to generate a siphon phenomenon earlier, faster, and more easily, which is equivalent to indirectly expanding the influence radius of the siphon drainage pipe, thereby improving the overall drainage efficiency of the system.

[0017] The relay drainage device in this solution drives the second impeller to rotate via a drive component, enabling the connector assembly to direct and accelerate the outward flow of water from its internal cavity. The siphon drainage system in this solution, through the rotation of the second impeller, allows the connector assembly to collect the seepage water inside the drainage trough and direct and accelerate its flow towards the siphon drainage pipe. By periodically installing several relay drainage devices along the drainage trough path from the central area to the edge of the top plate, each relay drainage device sequentially agitates the water flow in its surrounding drainage trough, directing, relaying, and accelerating its flow towards the siphon drainage pipe. This indirectly expands the influence radius of the siphon drainage pipe, thereby comprehensively solving the problem of seepage water stagnation and slow discharge in the central area of ​​the siphon drainage system, achieving the effect of improving the overall drainage efficiency of the system.

[0018] The drainage trough adapter in this solution converts the water supply from the drainage trough to the water supply from the drainage pipe. By utilizing the flexible and adaptable pipeline of the drainage pipe, the problem of limited connection angle and position of the drainage trough is solved, thus achieving the effect of flexible connection between drainage troughs. Attached Figure Description

[0019] Figure 1 This is a cross-sectional view of Embodiment 1 of the present invention, wherein the vent pipe is L-shaped.

[0020] Figure 2 This is a cross-sectional view of Embodiment 1 of the present invention, wherein the vent pipe is J-shaped.

[0021] Figure 3 This is a cross-sectional view of Embodiment 1 of the present invention, wherein the vent pipe is J-shaped and its head passes through the bucket lid.

[0022] Figure 4 This is a plan view of the bucket lid according to Embodiment 1 of the present invention.

[0023] Figure 5 This is a top view of Embodiment 1 of the present invention after the bucket lid and filter material have been removed.

[0024] Figure 6 This is a schematic diagram of the structure of Embodiment 2 of the present invention.

[0025] Figure 7 This is a cross-sectional view of the connector assembly of Embodiment 2 or 3 of the present invention.

[0026] Figure 8 This is a schematic diagram of the structure of Embodiment 3 of the present invention.

[0027] Figure 9 A structural diagram is provided for the connection angle in Embodiment 4 of the present invention.

[0028] Figure 10 This is a structural diagram of Embodiment 4 of the present invention when structural components are avoided.

[0029] Figure 11 This is a structural diagram of the first connector in Embodiment 4 of the present invention.

[0030] Figure 12 This is a structural diagram of the second connector in Embodiment 4 of the present invention.

[0031] Figure 13 This is a side view of the second connector in Embodiment 4 of the present invention.

[0032] Figure 14 This is an enlarged view of point A of the second connector in Embodiment 4 of the present invention.

[0033] Figure 15 This is a schematic diagram of the planar layout of Embodiment 5 of the present invention.

[0034] Label Explanation 1: Bucket lid 10, first frame 11, first mesh grid 12, collection bucket 20, divider plate 21, filter basket 30, hook 31, filter material 32, second mesh grid 33, water pipe 40, second inlet 41, second outlet 42, vent pipe 50, first siphon pipe 60, water inlet section 61, ∩-shaped section 62, diversion section 63, water outlet section 64, first inlet 65, first outlet 66, fixing component 70.

[0035] Labelling Explanation 2: First impeller body 210, first outer shell 211, first impeller 212, second impeller body 220, second outer shell 221, second rotor 222, second blade 223, transmission assembly 230, transmission shaft 231, gearbox 232, first sleeve 233, bearing 234, connector assembly 240, connector inlet 241, connector outlet 242, second sleeve 250, motor assembly 260, motor protective cover 261, motor junction box 262.

[0036] Label Explanation 3: First connector 301, Second connector 302, Drain pipe 303, Drain straight pipe 304, Drain elbow 305, First interface 310, First boss 311, Second boss 312, First step 313, Second step 314, Hanging edge 315, Hanging hook 316, Lower edge 317, Second interface 320.

[0037] Label Explanation 4: Drainage trough 110, siphon drainage pipe 120, rainwater drainage network 130, drainage trough connector 140, water collection plate 150, water storage and drainage module 160, leakage siphon compensation device 100, water-driven relay drainage device 201, electric-driven relay drainage device 202, drainage trough adapter 300. Detailed Implementation

[0038] The accompanying drawings are for illustrative purposes only and should not be construed as limiting the invention. To better illustrate the following embodiments, some parts in the drawings may be omitted, enlarged, or reduced, and do not represent the actual product dimensions; it is understandable to those skilled in the art that some well-known structures and their descriptions may be omitted in the drawings.

[0039] Example 1

[0040] like Figure 1 , Figure 2 , Figure 3 As shown, this embodiment is a leakage siphon compensation device, including a bucket lid 10, a collection bucket 20, and a filter basket 30, a water pipe 40, and a first siphon pipe 60 disposed inside the collection bucket 20. Rainwater enters the collection bucket 20 from top to bottom through the bucket lid 10, the filter basket 30, and the water pipe 40. The rainwater in the collection bucket 20 enters the first siphon pipe 60 through the first inlet 65. When the rainwater reaches the highest point of the first siphon pipe 60, the first siphon pipe 60 generates a siphon effect and quickly discharges the rainwater from the first outlet 66 located on the lower side wall of the collection bucket 20.

[0041] The leakage-type siphon compensation device of this scheme includes a collection tank 20 with a lid 10, a filter basket 30, a water pipe 40, and a first siphon pipe 60 installed from top to bottom. The collection tank 20 is buried underground, while the lid 10 is located above ground. The lid 10 is used to collect rainwater and runoff from the ground and simultaneously filter large impurities. The filter basket 30 is used to further filter small impurities in the rainwater. The water pipe 40 is used to guide the filtered rainwater into the collection tank 20 for storage. The first siphon pipe 60 is vertically installed at the bottom of the collection tank 20 and includes a first inlet 65 and a first outlet 66. Rainwater in the collection tank 20 enters the first siphon pipe 60 through the first inlet 65. As the rainwater level in the collection tank 20 gradually increases, the rainwater level in the rising channel of the first siphon pipe 60 increases synchronously. When the rainwater level reaches the highest point of the first siphon pipe 60, the first siphon pipe 60 generates a siphon effect, rapidly drawing rainwater from the collection tank 20 through the first inlet 65 and discharging it through the first outlet 66 until the rainwater level in the collection tank 20 is lower than the first inlet 65. This solution, through rainwater collection in the collection tank and the siphon effect of the first siphon pipe, achieves intermittent high-speed water flow from the first outlet without the need for an additional power device.

[0042] Preferably, the lower part of the collection bucket 20 is provided with a partition plate 21, which divides the internal space of the collection bucket 20 into an upper area and a lower area. The upper area is used to store rainwater flowing in from the water pipe 40, and the lower area is used to install the pipe of the first siphon pipe 60. In this solution, the upper and lower areas of the collection bucket 20 are independent of each other. The bottom of the upper area is provided with the first inlet 65 of the first siphon pipe 60, which is close to the partition plate 21 so that the first siphon pipe 60 can fully drain the stored rainwater, reducing rainwater residue and mosquito breeding. The lower area can just accommodate the pipe of the first siphon pipe 60 connected to the first outlet 66. The pipe of the first siphon pipe 60 is completely hidden inside the collection bucket 20, avoiding damage from external forces, and is reliable and aesthetically pleasing.

[0043] Optionally, the lower side wall of the collection bucket 20 is provided with a connection structure for connecting to the drainage trough. The connection structure is specifically designed according to the end structure of different types of drainage troughs, and commonly a snap-fit ​​type or a slot type.

[0044] Optionally, the upper sidewall of the collection bucket 20 is provided with steps around its end face, which are used to embed and fix the bucket lid 10.

[0045] Preferably, the first siphon pipe 60 includes an inlet section 61, a U-shaped section 62, a diversion section 63, and an outlet section 64 connected in series. One end of the inlet section 61 is the first inlet 65. The inlet section 61 and the U-shaped section 62 are located in the upper region of the collection bucket 20. The diversion section 63 passes through the partition plate 21 and diverts the rainwater in its pipe. The outlet section 64 is located in the lower region of the collection bucket 20. One end of the outlet section 64 is the first outlet 66.

[0046] Preferably, the filter basket 30 is filled with filter media 32, which is used to filter impurities in rainwater; a second mesh grille 33 is provided at the bottom of the filter basket 30, which is used to receive the filter media 32 and support the bottom of the filter basket 30. The filtered rainwater collects at the bottom of the filter basket 30 and enters the water pipe 40 through the opening at the bottom.

[0047] Optionally, the filter material 32 includes multiple layers of mesh, fine sand, gravel, etc., stacked sequentially to fully filter out small impurities in the rainwater and prevent them from clogging the first siphon pipe 60 or being discharged outward from the first outlet 66 along with the high-speed rainwater.

[0048] like Figure 5As shown, the filter basket 30 is further provided with a hook 31 on its upper edge, which is used to hang the filter basket 30 on the upper edge of the collection bucket 20. The filter basket 30 should preferably be detachable to facilitate regular cleaning of the filter basket 30, and the fixing method of the hook 31 is simple and reliable, and can withstand the weight of the filter basket 30 and filter media 32.

[0049] Preferably, the water pipe 40 is provided with a second inlet 41 and a second outlet 42. The second inlet 41 is located at the bottom of the filter basket 30, and the second outlet 42 is offset from the first siphon pipe 60. The vertical position of the second outlet 42 should be relatively vertically offset from the first siphon pipe 60 to avoid large-volume rainwater washing away the first siphon pipe 60 and reducing its service life.

[0050] Preferably, the collection bucket 20 further includes a vent pipe 50, the head of which passes upward through the filter basket 30 or through the filter basket 30 and the bucket lid 10. The vent pipe 50 is used to connect the atmosphere with the collection bucket 20 to balance the air pressure inside the collection bucket 20. When the incoming rainwater is large, the rainwater forms a water seal in the gap between the filter basket 30 and the collection bucket 20, making it difficult to balance the air pressure in the collection bucket 20. The first siphon pipe 60 is unable to generate a siphon effect. The additional vent pipe 50 can effectively solve this problem.

[0051] Furthermore, the vent pipe 50 is a straight pipe, or a J-shaped or L-shaped pipe, with a water-repellent cap at one end and a filter screen at the other end. The water-repellent cap is used to prevent water and debris from entering the pipe; the other end has a regular filter screen to prevent impurities from falling into the collection bucket 20.

[0052] like Figure 4 As shown, preferably, the bucket lid 10 includes a first frame 11 and a first mesh grid 12. The first frame 11 surrounds the first mesh grid 12, and the width of the first frame 11 can completely cover the end face of the upper side wall of the collection bucket 20.

[0053] Optionally, a fixing member 70 is provided on the inner wall of the collection bucket 20. The fixing member 70 is used to fix the first siphon pipe 60, the water pipe 40, or the air pipe 50. When the first siphon pipe 60, the water pipe 40, and the air pipe 50 are made of plastic, steel ropes, rope sleeves, fasteners, etc. are required to fix the positions of the first siphon pipe 60, the water pipe 40, and the air pipe 50 to prevent them from swinging, deforming, or breaking.

[0054] In this embodiment, the collection bucket 20 is a rectangular or cylindrical body with a certain height and a square or circular cross-section. The material can be concrete or PVC / HDPE plastic, and its overall strength is sufficient to withstand conventional live loads. The collection bucket 20 has various height specifications to match the soil thickness of different planting roofs. The collection bucket 20 is essentially two-layered, with the lower region being significantly shorter than the upper region. The lower region's height only needs to accommodate the diversion section 63 and outlet section 64 of the first siphon pipe 60; the upper region accommodates the filter basket 30, water pipe 40, air pipe 50, and the first siphon pipe 60, and also serves to collect a certain amount of rainwater. The partition plate 21 is a horizontal plate inside the collection bucket 20, integrally formed with the side wall of the collection bucket 20.

[0055] In this embodiment, the first frame 11 (edge ​​position) of the bucket lid 10 is a single, impermeable area, and the first mesh 12 (middle area) is a rectangular mesh with a mesh spacing of no more than 15mm and a length of no more than 32mm, used to collect surface runoff. The material can be concrete or PVC / HDPE plastic, and its overall strength is sufficient to withstand conventional live loads. A step is provided below the first frame 11 of the bucket lid 10 to support the bucket lid 10 to a certain height. The size of the bucket lid 10 is sufficient to completely cover the upper area of ​​the collection bucket 20, preventing damage from surface loads.

[0056] In this embodiment, the filter basket 30 is generally shaped like an inverted trapezoid or funnel, and its specific shape must be consistent with the shape of the collection bucket 20. The material can be concrete or PVC / HDPE plastic, and its overall strength must be able to withstand conventional live loads. The filter media 32 is made of common gravel or pebbles. Hooks 31 are evenly distributed along the upper edge of the filter basket 30, depending on its size.

[0057] In this embodiment, the first siphon pipe 60 is preferably made of PVC or HDPE plastic and can be assembled using existing standard PVC water pipes. The inlet section 61 includes a 90° bend, and the first inlet 65 is horizontally positioned close to the partition plate 21. The height of the U-shaped section 62 determines the conditions under which the siphon phenomenon occurs. The diversion section 63 is used to split rainwater into two, three, or four connectors, and each of its outlets is connected to several outlet sections 64. The outlet sections 64 are straight pipes, with one end passing through the lower side wall of the collection tank 20.

[0058] In this embodiment, the water pipe 40 is preferably made of PVC or HDPE plastic and can be assembled using existing standard PVC water pipes. A common filter screen is installed at the head and / or tail of the water pipe 40 to isolate impurities. The second inlet 41 of the water pipe 40 is installed below the second mesh grille 33 and is suspended from the bottom of the filter basket 30. The shape of the water pipe 40 can be a straight pipe, L-shaped, or S-shaped.

[0059] In this embodiment, the vent pipe 50 is preferably made of PVC or HDPE plastic and can be assembled using existing standard PVC water pipes. The head of the vent pipe 50 can be located below the lid 10 and above the surface of the filter media 32 of the filter basket 30; or it can extend out of the lid 10 and protrude from the ground.

[0060] Example 2

[0061] like Figure 6 , Figure 7 As shown, this embodiment is a water-driven relay drainage device, including a first impeller body 210, a second impeller body 220, a transmission assembly 230, and a connector assembly 240. The first impeller body 210 is disposed above the connector assembly 240, and the second impeller body 220 is disposed inside the connector assembly 240. The first impeller body 210 and the second impeller body 220 are linked by the transmission assembly 230. The connector assembly 240 is provided with a connector inlet 241 and a connector outlet 242. External water flow drives the first impeller body 210 to rotate, which in turn drives the second impeller body 220 to rotate through the transmission assembly 230. The second impeller body 220 disturbs the water flow inside the connector assembly 240, causing it to accelerate from the connector inlet 241 to the connector outlet 242.

[0062] In this water-driven relay drainage device, the first impeller body 210 is located on the ground surface, while the second impeller body 220 and the connector assembly 240 are buried underground. A transmission assembly 230 connects the first impeller body 210 and the second impeller body 220 through the soil. A surface water supply and drainage network connects to the inlet of the first impeller body 210, allowing external water to enter and drive its rotation. On one hand, because the first impeller body 210 and the second impeller body 220 are linked via the transmission assembly 230, the second impeller body 220 rotates inside the connector assembly 240. The inner cavity of the second impeller body 220 is interconnected with the inner cavity of the connector assembly 240, and the water flow inside the connector assembly 240 continuously flows in a directional and accelerated manner along the sequence of connector inlet 241, second impeller body inlet 220, second impeller body outlet 220, and connector outlet 242, thus realizing the function of the connector assembly in directional water output. On the other hand, the kinetic energy of the external water flow is converted into the kinetic energy of the rotation of the first impeller body 210, and then into the kinetic energy of the water flow inside the joint assembly 240 caused by the disturbance of the second impeller body 220. This achieves energy conversion and utilization without the need for an additional power unit. This solution utilizes the kinetic energy of the external water flow through the first and second impeller bodies to enable the joint assembly to direct and accelerate the water flow inside its cavity outwards.

[0063] Furthermore, the type of connector assembly 240 can be classified as a straight connector, a tee connector, or a four-way connector, depending on the number of its connector inlets 241 or connector outlets 242, without limitation. In this embodiment, the connector assembly 240 is a four-way connector, with three connector inlets 241 and one connector outlet 242, arranged in a cross shape.

[0064] Preferably, the first impeller body 210 includes a first outer shell 211 and a first impeller 212; the first outer shell 211 is turbine-shaped and has an inlet and an outlet; the first impeller 212 is installed inside the first outer shell 211, and the shaft of the first impeller 212 is connected to the transmission assembly 230; external water flows into the first outer shell 211 through the inlet, driving the first impeller 212 and its shaft to rotate, thereby causing the transmission assembly 230 to rotate.

[0065] In this embodiment, the diameter of the first impeller 212 is 40cm, and the first outer shell 211 is made of stainless steel. The first impeller 212 includes first blades and a rotating shaft, with the first blades distributed on the circumferential surface of the rotating shaft. When the external water flow propels the first impeller 212 to rotate, it is always a continuous pressurized flow filling the entire first impeller 212. Under the constraint of the first blades on the spatial curved surface, the magnitude and direction of the flow velocity are continuously changed, thereby generating a reaction force on the first impeller 212 and driving the first impeller 212 to rotate. The kinetic energy of the external water flow does work on the first impeller 212, and its kinetic energy is converted into the kinetic energy of the rotation of the first impeller 212.

[0066] Preferably, the second impeller body 220 includes a second outer shell 221, a second rotor 222, and a second blade 223; the second outer shell 221 is embedded inside the connector assembly 240 and has an inlet and an outlet, the inlet communicating with the connector inlet 241 and the outlet communicating with the connector outlet 242; the second rotor 222 is installed inside the second outer shell 221, one end of the second blade 223 is embedded and distributed on the circumferential surface of the second rotor 222, and the other end of the second blade 223 touches the second outer shell 221; the transmission assembly 230 drives the second rotor 222 to rotate, and the second blade 223 slides on the second outer shell 221, so that the water flow from the connector inlet 241 is drawn into the second outer shell and accelerated to converge at the connector outlet 242.

[0067] In this embodiment, the inlet of the second impeller body 220 is located at the lower part of the second outer shell 221, and the outlet of the second impeller body 220 is located at the upper part of the second outer shell 221. The inlet and outlet of the second impeller body 220 are staggered. Utilizing the impeller drive principle of a submersible pump, water enters through the lower inlet, and the second rotor 222 drives the second blades 223 to slide on the second outer shell 221, forming a water seal. Then, water is discharged through the upper outlet, realizing that the water in the inner cavity of the connector assembly 240 flows through the inner cavity of the second impeller body 220 from the connector inlet 241 to the connector outlet 242.

[0068] Preferably, the transmission assembly 230 includes a transmission shaft 231 and a gearbox 232. The first impeller body 210, the gearbox 232, the transmission shaft 231, and the second impeller body 220 are connected in series. When the first impeller body 210 rotates, the second impeller body 220 rotates synchronously.

[0069] Furthermore, the transmission assembly 230 also includes a first sleeve 233 and a bearing 234; the first sleeve 233 is sleeved on the outside of the transmission shaft 231 and is used to seal and isolate the transmission shaft 231 from the outside; the bearing 234 is disposed at the upper and lower ends of the first sleeve 233 and is used to support the transmission shaft 231 to rotate within the first sleeve 233.

[0070] In this embodiment, the shaft of the first impeller 212 is connected to the input shaft of the gearbox 232, the output shaft of the gearbox 232 is connected to one end of the drive shaft 231, and the other end of the drive shaft 231 is connected to the second rotor 222 of the second impeller body 220. The gearbox 232 is a gearbox used to adjust the rotational speed of the drive shaft 231, thereby adjusting the rotational speed of the second impeller body 220. One end of the first sleeve 233 is fixed to the gearbox 232, and the other end is fixed to the connector assembly 240 or the second impeller body 220. The transmission assembly 230 further transmits the kinetic energy of the first impeller body 210 to the lower second impeller body 220, thereby disturbing the water flow within the connector assembly 240.

[0071] Preferably, the assembly further includes a second sleeve 250, which is sleeved on the outside of the transmission assembly 230. The inner cavity of the second sleeve 250 connects the inner cavity of the first impeller body 210 and the inner cavity of the connector assembly 240. After the external water flow drives the first impeller body 210 to rotate, it enters the inner cavity of the connector assembly 240 through the inner cavity of the second sleeve 250. The second sleeve 250 serves as a support to connect the first impeller body 210, the transmission assembly 230, and the connector assembly 240. It also allows external water flow to be introduced into the connector assembly 240 as compensation. The external water flow can flow into the connector inlet 241 of the connector assembly 240 through the second sleeve 250, or it can flow directly into the inlet of the second impeller body 220.

[0072] Furthermore, the inner wall of the second sleeve 250 is funnel-shaped, and the lower part of the second sleeve 250 is connected to the inner cavity of the second impeller body 220.

[0073] Furthermore, the inner wall of the second sleeve 250 is provided with spiral grooves or spiral protrusions for forming a spiral water flow.

[0074] In this embodiment, the inlet of the first outer shell 211 of the first impeller body 210 is connected to the rainwater drainage network. The outlet of the first outer shell 211 is centrally located and communicates with the inner cavity of the second sleeve 250. An additional inlet is provided on the upper part of the second outer shell 221 of the second impeller body 220. External water flows into the inner cavity of the second sleeve 250 through the outlet of the first outer shell 211. The external water flow gradually accelerates as it is collected by the funnel-shaped inner wall; guided by the spiral grooves or spiral protrusions on the inner wall, it gradually swirls and forms a spiral water flow. Finally, the external water flow enters the inner cavity of the second impeller body 220 through the additional inlet, further pushing the second blade 223 to slide, accelerating the rotational speed of the second rotor 222, realizing the reuse of the energy of the external water flow, and also improving the drainage speed of the second impeller body, thereby accelerating the orientation and collection of water flow of the connector assembly.

[0075] In this embodiment, the second sleeve 250 is a metal sealing cylinder with a straight outer wall and a funnel-shaped inner wall. The inner wall of the second sleeve 250 forms a spiral water flow channel. The drive shaft 231 of the transmission assembly 230 is sealed and enclosed by the first sleeve 233 to isolate the drive shaft 231 from the water flow channel, thereby reducing the resistance of the water flow to the drive shaft 231. In addition, the first outer shell 211 of the first impeller body 210, the second outer shell 221 of the second impeller body 220, the first sleeve 233, and the second sleeve 250 can be made of high-strength stainless steel or resin materials with high physical performance and high acid and alkali resistance.

[0076] Example 3

[0077] like Figure 7 , Figure 8 As shown, this embodiment is an electrically driven relay drainage device, including a motor assembly 260, a second impeller body 220, a transmission assembly 230, and a connector assembly 240. The motor assembly 260 is disposed above the connector assembly 240, and the second impeller body 220 is disposed inside the connector assembly 240. The motor assembly 260 and the second impeller body 220 are linked through the transmission assembly 230. The connector assembly 240 is provided with a connector inlet 241 and a connector outlet 242. When the motor assembly 260 is energized and rotates, it drives the second impeller body 220 to rotate through the transmission assembly 230. The second impeller body 220 agitates the water flow inside the connector assembly 240, causing it to accelerate from the connector inlet 241 to the connector outlet 242.

[0078] In this electrically driven relay drainage device, the motor assembly 260 is located on the ground surface, while the second impeller body 220 and the connector assembly 240 are buried underground. A transmission assembly 230 connects the motor assembly 260 and the second impeller body 220 through the soil. When the motor assembly 260 is energized, it drives the second impeller body 220 to rotate inside the connector assembly 240. The inner cavity of the second impeller body 220 is interconnected with the inner cavity of the connector assembly 240. The water flow inside the connector assembly 240 continuously flows in a directional and accelerated manner along the sequence of connector inlet 241, second impeller body inlet 220, second impeller body outlet 220, and connector outlet 242, thus enabling the connector assembly 240 to directionally output water. This design uses the motor assembly to drive the second impeller body to rotate, enabling the connector assembly to directionally and rapidly output the water flow from its inner cavity.

[0079] Furthermore, the type of connector assembly 240 can be classified as a straight connector, a tee connector, or a four-way connector, depending on the number of its connector inlets 241 or connector outlets 242, without limitation. In this embodiment, the connector assembly 240 is a four-way connector, with three connector inlets 241 and one connector outlet 242, arranged in a cross shape.

[0080] Preferably, the motor assembly 260 includes a motor body, a motor protective cover 261, and a motor junction box 262; the motor protective cover 261 covers the outside of the motor body; the motor junction box 262 is located on one side of the motor body and embedded in one side of the motor protective cover 261. The motor protective cover 261 provides reliable waterproof protection for the motor body. The motor junction box 262 provides reliable waterproof protection for the wiring terminals of the motor body. The motor body is placed vertically, with its output shaft facing downwards and connected to the transmission assembly 230.

[0081] Preferably, the second impeller body 220 includes a second outer shell 221, a second rotor 222, and a second blade 223; the second outer shell 221 is embedded inside the connector assembly 240 and has an inlet and an outlet, the inlet communicating with the connector inlet 241 and the outlet communicating with the connector outlet 242; the second rotor 222 is installed inside the second outer shell 221, one end of the second blade 223 is embedded and distributed on the circumferential surface of the second rotor 222, and the other end of the second blade 223 touches the second outer shell 221; the transmission assembly 230 drives the second rotor 222 to rotate, and the second blade 223 slides on the second outer shell 221, so that the water flow from the connector inlet 241 is drawn into the second outer shell 221 and accelerated to converge at the connector outlet 242.

[0082] In this embodiment, the inlet of the second impeller body 220 is located at the lower part of the second outer shell 221, and the outlet of the second impeller body 220 is located at the upper part of the second outer shell 221. The inlet and outlet of the second impeller body 220 are staggered. Utilizing the impeller drive principle of a submersible pump, water enters through the lower inlet, and the second rotor 222 drives the second blades 223 to slide on the second outer shell 221, forming a water seal. Then, water is discharged through the upper outlet, realizing that the water in the inner cavity of the connector assembly 240 flows through the inner cavity of the second impeller body 220 from the connector inlet 241 to the connector outlet 242.

[0083] Preferably, the transmission assembly 230 includes a transmission shaft 231 and a gearbox 232. The motor assembly 260, the gearbox 232, the transmission shaft 231, and the second impeller body 220 are connected in series. When the motor assembly 260 is energized and rotates, the second impeller body 220 rotates synchronously.

[0084] Furthermore, the transmission assembly 230 also includes a first sleeve 233 and a bearing 234; the first sleeve 233 is sleeved on the outside of the transmission shaft 231 and is used to seal and isolate the transmission shaft 231 from the outside; the bearing 234 is disposed at the upper and lower ends of the first sleeve 233 and is used to support the transmission shaft 231 to rotate within the first sleeve 233.

[0085] In this embodiment, the output shaft of the motor assembly 260 is connected to the input shaft of the transmission 232. The output shaft of the transmission 232 is connected to one end of the drive shaft 231, and the other end of the drive shaft 231 is connected to the second rotor 222 of the second impeller body 220. The transmission 232 is a gearbox used to adjust the rotational speed of the drive shaft 231, thereby adjusting the rotational speed of the second impeller body 220. One end of the first sleeve 233 is fixed to the transmission 232, and the other end is fixed to the connector assembly 240 or the second impeller body 220. The transmission assembly 230 further transmits the kinetic energy of the motor assembly 260 to the lower second impeller body 220, thereby disturbing the water flow within the connector assembly 240.

[0086] Preferably, the device further includes a second sleeve 250, which is fitted onto the outside of the transmission assembly 230. One end of the second sleeve 250 is connected to the motor assembly 260 via a flange, and the other end is connected to the connector assembly 240 via a snap-fit. The second sleeve 250 serves two purposes: firstly, as a support to assemble the surface and underground parts of the electric drive relay drainage device; and secondly, as a sealing sleeve to isolate the transmission assembly 230 from the external soil.

[0087] Optionally, the upper sidewall of the second sleeve 250 is provided with a water inlet grille along the circumferential direction, and the inner cavity of the second sleeve 250 is connected to the inner cavity of the connector assembly 240; after the external water flows in from the water inlet grille, it enters the connector inlet 241 of the connector assembly 240 through the inner cavity of the second sleeve 250.

[0088] In this embodiment, the second sleeve 250 is a metal-sealed straight cylinder. The inner wall of the second sleeve 250 can form a water delivery channel. The drive shaft 231 of the transmission assembly 230 is sealed and enclosed by the first sleeve 233 to isolate the drive shaft 231 from the water delivery channel, thereby reducing the resistance of the water flow to the drive shaft 231. In addition, the second outer shell 221 of the second impeller body 220, the first sleeve 233, and the second sleeve 250 can be made of high-strength stainless steel or resin materials with high physical performance and high acid and alkali resistance.

[0089] Optionally, the connector inlet 241 or the connector outlet 242 is provided with a snap-fit ​​structure for connecting to the drain trough.

[0090] Optionally, the electric drive relay drainage device may further include a photovoltaic power generation component or a wind power generation component for powering the motor assembly 260.

[0091] Example 4

[0092] like Figure 9 , Figure 10 As shown, this embodiment is a drain adapter, including a drain pipe 303 and a first connector 301 and a second connector 302 located at both ends thereon. The first connector 301 and the second connector 302 are used to connect the drain pipe and the drain trough, respectively. The two ends of the first connector 301 and the second connector 302 respectively include a first interface 310 for connecting the drain trough and a second interface 320 for connecting the drain pipe.

[0093] In this design, the two ends of the drainage trough adapter connect to straight drainage troughs, tee drainage troughs, and four-way drainage troughs, respectively, with the central drainage pipe 303 serving as a water supply channel connecting the two ends. Existing mature drainage pipe products allow for flexible and versatile pipe configurations. On one hand, the first connector 301 and the second connector 302 have various variable connection angles, thus accommodating non-90° assembly connections between straight drainage troughs. On the other hand, they can replace straight drainage troughs, easily avoiding protruding structural components on the building roof, thereby ensuring continuous permeable water supply between the two straight drainage troughs at that location. This drainage trough adapter converts the water supply from the drainage trough to the drainage pipe, leveraging the flexible and versatile pipe configuration to solve the problem of limited connection angles and positions of the drainage troughs, achieving flexible connections between them. Furthermore, in special cases, the drainage pipe 303 can also be a long straight pipe, with the drainage trough adapter acting as a connector to balance the permeable water levels in the two drainage network areas. Furthermore, the structure of the first interface 310 and the second interface 320 depends on the interface structure of the drainage trough and drainage pipe 303 that need to be connected. In special cases, the structure of the first connector 301 and the second connector 302 can also be the same.

[0094] Optionally, the drain pipe 303 includes a straight drain pipe 304 and a drain elbow 305. The straight drain pipe 304 and the drain elbow 305 are spliced ​​together to form a curved or bend shape. For example, the drain pipe 303 can be made of existing PVC drain pipe fittings, including straight pipes, straight sections, 45° elbows, 60° elbows, 90° elbows, etc. Then, according to the connection angle required by the first connector 301 and the second connector 302, or the protruding structural components of the building roof that need to be avoided, the corresponding pipe with a curved or bend shape can be easily spliced ​​together.

[0095] Optionally, the drain pipe 303 is a corrugated pipe, which can be adjusted into a bent or twisted shape under force. The corrugated pipe has a certain degree of flexibility, which allows its two ends, namely the first joint 301 and the second joint 302, to have multiple connection angles, and it can also be bent multiple times to bypass the protruding structural members of the building roof.

[0096] like Figure 11 , Figure 12 , Figure 13 As shown, in this design, the cross-section of the drainage trough is shaped like a "∩", and the drainage pipe 303 is typically a circular pipe; therefore, the cross-section of the first interface 310 is shaped like a "∩", and the cross-section of the second interface 320 is circular. Referring to existing drainage trough interfaces, the structure of the first interface 310 can be achieved through snap-fit, hook-fit, or plug-fit methods. This design optimizes the snap-fit ​​method.

[0097] Preferably, the first interface 310 includes a first boss 311 and a second boss 312 for interlocking. The first boss 311 is located on the upper surface of one end of the first connector 301, and the second boss 312 is located on the upper surface of one end of the second connector 302. Both the first boss 311 and the second boss 312 are hollow protrusions, and the first boss 311 can be nested on the outer surface of the second boss 312, thereby achieving interlocking.

[0098] Furthermore, the first interface 310 also includes a first step 313 and a second step 314. The first step 313 and the second step 314 are used to limit the end face position when the drainage channel is connected. The first step 313 is located on the inner wall of the first connector 301, and the second step 314 is located on the outer wall of the second connector 302. The first step 313 and the second step 314 can prevent the connected parts from rotating around the first boss 311 and the second boss 312, thereby improving the reliability of the connection.

[0099] Furthermore, the lower edges of the sidewalls of the first connector 301 and the second connector 302 extend horizontally outward to form a lower edge 317. The lower edge 317 increases the contact area between the first connector 301 and the second connector 302 and the building roof slab.

[0100] Furthermore, the first interface 310 also includes a hook-on edge 315 and a hook-on hook 316 for interlocking. The hook-on edge 315 is located on the upper surface edge of the lower edge 317 of the first connector 301, and the hook-on hook 316 is located on the upper surface edge of the lower edge 317 of the second connector 302. The hook-on edge 315 fixes the two connected parts from both sides of the first connector 301, forming a three-point fixing relationship with the first boss 311; similarly, the hook-on hook 316 also forms a three-point fixing relationship with the second boss 312, further improving the reliability of the connection fixation.

[0101] like Figure 14 As shown, further, the hook edge 315 is a groove with an arc-shaped cross section, and the hook 316 is a barb with an arc-shaped protrusion at the end.

[0102] Preferably, a third step is provided on the inner wall of the second interface 320, and the third step is used to limit the end face position of the drain pipe 303 when it is embedded and spliced.

[0103] In this embodiment, the first connector 301 and the second connector 302 are integrally injection molded, and both the drain pipe 303 and the second interface 320 are circular pipes. The drain pipe 303 is inserted into the second interface 320, with its end face touching the third step to complete the assembly connection between the drain pipe 303 and the first connector 301 and the second connector 302. The drain pipe 303 is a pipe with a curved or bend shape, composed of a straight drain pipe 304 and a drain elbow 305. The diameter of the drain pipe 303 is as close as possible to the opening size of the drain channel. The overall size of the first connector 301 is slightly larger than that of the second connector 302. The first connector 301 has a female thread structure, and the second connector 302 has a male thread structure. In the first interface 310, the first boss 311 and the second boss 312 are centrally located elongated hollow protrusions with their sidewalls slightly inclined inward. The first step 313 and the second step 314 protrude 1 to 5 mm around the wall. The lower edge 317 of the second connector 302 is flush with the second step 314 to avoid interference with the lower edge of the drainage groove. The length of the hook edge 315 and the hook 316 is not less than 20mm.

[0104] In this embodiment, when the drain trough adapter is used, the first connector 301 engages with the drain trough on one side from top to bottom, with the first connector 301 partially overlapping the drain trough. The first step 313 of the first connector 301 restricts the end face position of the drain trough. The first boss 311 of the first connector 301 engages with the second boss of the drain trough. The hooking edge 315 of the first connector 301 engages with the hook of the drain trough. The drain trough on the other side engages with the second connector 302 from top to bottom, with the second connector 302 partially overlapping the drain trough. The second step 314 of the second connector 302 restricts the end face position of the drain trough. The second boss 312 of the second connector 302 engages with the first boss of the drain trough. The hook 316 of the second connector 302 engages with the hooking edge of the drain trough.

[0105] In other embodiments, the drain adapter can be assembled from a first connector, a drain pipe, and a second connector, or from a second connector, a drain pipe, and a third connector.

[0106] Example 5

[0107] like Figure 15As shown, this embodiment is a large-span roof slab siphon drainage system, including a drainage channel 110, a drainage channel connector 140, and a siphon drainage pipe 120. The drainage channels 110 are connected through the drainage channel connector 140 to form a drainage network. The siphon drainage pipe 120 is connected to the edge of the drainage network. A leakage-type siphon compensation device 100 and a relay drainage device are provided in the area of ​​the drainage network away from the siphon drainage pipe 120. The leakage-type siphon compensation device 100 is used to quickly discharge the rainwater collected inside into the drainage channel 110, pushing the infiltrated water inside the drainage channel 110 towards the siphon drainage pipe 120. The relay drainage device is used to collect and agitate the infiltrated water inside the drainage channel 110, driving the infiltrated water inside the drainage channel 110 towards the siphon drainage pipe 120.

[0108] In this embodiment, the large-span roof slab siphon drainage system uses the seepage-type siphon compensation device 100 from Embodiment 1; the lower part of the collection bucket 20 is connected to the drainage trough 110, and the first outlet 66 of the first siphon pipe 60 extends into the interior of the drainage trough 110; the rainwater in the collection bucket 20 is quickly discharged into the drainage trough 110 through the first outlet 66, pushing the seepage water inside the drainage trough 110 to flow towards the siphon drainage pipe 120.

[0109] In this design, the aforementioned seepage-type siphon compensation device is installed at the node position (connection position of the drainage trough 110) in the middle region of the top plate. The lower side wall of the collection bucket 20 is connected to the end of the drainage trough 110, and the first outlet 66 extends into the interior of the drainage trough 110. The collection bucket 20 can fully utilize surface runoff and rainwater to filter and collect this rainwater. When the rainwater in the collection bucket 20 reaches a certain height, the first siphon pipe 60, with the help of atmospheric pressure, quickly discharges the rainwater in the collection bucket 20 from the first outlet 66 and into the drainage trough 110. The high-speed outflowing rainwater can scour and disturb the seepage water retained in the drainage trough 110, accelerating the seepage water to flow towards the siphon drainage pipe 120 at the edge of the siphon drainage system. This solution uses high-speed rainwater discharged through a seepage-type siphon compensation device to disturb the stagnant seepage water in the central area, accelerating its flow towards the siphon drainage pipe. This solves the problem of stagnant seepage water and slow discharge in the central area, achieving the goal of diverting stagnant seepage water in the central area of ​​the large-span roof slab to the edges. At the same time, the high-speed rainwater also increases the water level in the central area. The potential energy difference between the central and edge areas allows the siphon drainage pipes at the edges to generate a siphon phenomenon earlier, faster, and more easily, which is equivalent to indirectly expanding the influence radius of the siphon drainage pipes by 120°, thereby improving the overall drainage efficiency of the system.

[0110] One embodiment of the process is as follows: Surface runoff from rainfall flows into a filter basket 30 through the first mesh 12 of the lid 10. The filter basket 30 is filled with filter media 32 such as pebbles. The filter basket 30 is funnel-shaped and can filter large impurities and accelerate rainwater infiltration. The infiltrated rainwater then flows through an S-shaped water pipe 40 with a filter screen to the collection bucket 20. The collection bucket 20 accumulates rainwater, while the water level in the rising channel of the first siphon pipe 60 rises simultaneously. The J-shaped vent pipe 50 (with a mesh screen) keeps the collection bucket 20 connected to the ground surface, maintaining an internal pressure equal to atmospheric pressure. The siphon phenomenon occurs when the rainwater level exceeds the highest point of the first siphon pipe 60 and fills the entire siphon pipe. At this time, under the action of atmospheric pressure, the rainwater in the collection bucket 20 is quickly discharged through the first outlet 66 of the first siphon pipe 60, and the liquid level in the collection bucket 20 drops rapidly. Under the combined action of gravity and atmospheric pressure, the rainwater generates a high-speed water flow, which has a scouring and disturbing effect on the seepage water in the drainage trough 110 connected to the bottom, pushing the seepage water to the siphon drainage pipe 120 and accelerating the discharge of seepage water in the middle area.

[0111] In this embodiment, the large-span roof slab siphon drainage system uses the water-driven relay drainage device 201 from Embodiment 2; the connector inlet 241 and connector outlet 242 of the connector assembly 240 are respectively connected to the drainage trough 110; the first impeller body 210 is driven to rotate by the water flow of the rainwater discharge pipe network 130, thereby causing the second impeller body 220 to rotate, and the connector assembly 240 collects the seepage water inside the drainage trough 110, causing it to flow in a directional and accelerated manner toward the siphon drainage pipe 120.

[0112] In this scheme, the aforementioned water-driven relay drainage device 201 is installed at the node position (intersection of drainage channels 110) of the drainage channel 110 in the middle area of ​​the building roof. The connector assembly 240 is installed on the building roof, and its connector inlet 241 and connector outlet 242 are respectively connected to the drainage channel 110. The rainwater drainage network 130 mainly collects rainwater from the building roof. The water flow in its pipe has a large kinetic energy, which is connected to the first impeller body 210 for rotation drive to realize energy conversion and utilization. On the one hand, after the second impeller body 220 rotates successively, the seepage water retained in the drainage channel 110 away from the siphon drainage pipe 120 is continuously drawn in from the connector inlet 241 of the connector assembly 240, passes through the inner cavity of the second impeller body 220, and is discharged from the connector outlet 242 of the connector assembly 240, and then flows through the drainage channel 110 at the other end, accelerating towards the siphon drainage pipe 120. That is, by rotating the second impeller, the connector assembly can collect the seepage water inside the drainage trough and direct and accelerate its flow towards the siphon drainage pipe. On the other hand, by setting several water-driven relay drainage devices 201 at intervals along the path of the drainage trough 110 from the middle area to the edge of the top plate, each water-driven relay drainage device 201 disturbs the water flow in the drainage trough 110 around it in turn, causing it to flow in a directional, relay, and accelerated manner towards the siphon drainage pipe 120. This is equivalent to indirectly expanding the influence radius of the siphon drainage pipe 120, thereby comprehensively solving the problem of seepage water retention and slow discharge in the middle area of ​​the siphon drainage system, and achieving the effect of improving the overall drainage efficiency of the system.

[0113] In this scheme, the inner cavity of the connector assembly 240 is connected to the interior of the drainage trough 110. When external water flows into the inner cavity of the connector assembly 240, it is equivalent to replenishing the seepage water inside the drainage trough 110, increasing the water level in the middle area. The potential energy difference between the middle area and the edge of the top plate enables the siphon drainage pipe at the edge position to generate a siphon phenomenon earlier, faster, and easier, thus realizing the siphon compensation function.

[0114] Optionally, the connector inlet 241 or the connector outlet 242 is provided with a snap-fit ​​structure for connecting to the drain trough 110.

[0115] In this embodiment, the rainwater drainage network 130 can fully collect rainwater from the building roof. Utilizing the potential energy generated by the height difference between the roof and the roof slab, it drives the first impeller 210 on the ground surface, effectively converting the potential energy of the rainwater from the building roof into the kinetic energy of the water-driven relay drainage device 201. The speed of the drive shaft 231 is increased by the gearbox 232 at the bottom of the first impeller 210, thereby efficiently driving the rotation of the second impeller 220. During rotation, the second impeller 220 at the bottom can fully absorb water flow from the other three directions of the connector assembly 240 before outputting it in a predetermined direction. By continuously setting up the water-driven relay drainage device 201, the infiltrated water in the central area of ​​the system can be continuously output to the siphon drainage pipe 120 through relay drainage, thereby expanding the radius of influence of the siphon effect and comprehensively solving the problem of infiltrated water retention and slow discharge in the central area of ​​the siphon drainage system, achieving the effect of improving the overall drainage efficiency of the system.

[0116] In this embodiment, the large-span roof slab siphon drainage system uses the electric drive relay drainage device 202 from Embodiment 3; the connector inlet 241 and connector outlet 242 of the connector assembly 240 are respectively connected to the drainage trough 110; the motor assembly 260 is energized and rotates, driving the second impeller body 220 to rotate through the transmission assembly 230; the connector assembly 240 collects the seepage water inside the drainage trough 110 and directs and accelerates its flow to the siphon drainage pipe 120.

[0117] In this design, the aforementioned electrically driven relay drainage device 202 is installed at the node position (intersection of drainage channels 110) of the drainage channel 110 in the middle region of the large-span roof slab. A connector assembly 240 is installed on the building roof slab, with its connector inlet 241 and connector outlet 242 connected to the drainage channel 110. On one hand, after the second impeller body 220 rotates, the permeable water retained in the drainage channel 110 at the end away from the siphon drainage pipe 120 is continuously drawn in from the connector inlet 241 of the connector assembly 240, passes through the inner cavity of the second impeller body 220, and is then discharged from the connector outlet 242 of the connector assembly 240, before flowing through the drainage channel 110 at the other end and accelerating towards the siphon drainage pipe 120. That is, through the rotation of the second impeller body 220, the connector assembly 240 can collect the permeable water inside the drainage channel 110 and direct and accelerate its flow towards the siphon drainage pipe 120. On the other hand, by setting several electrically driven relay drainage devices 202 at intervals along the path of the drainage channel 110 from the central area to the edge of the top plate, each electrically driven relay drainage device 202 disturbs the water flow in the drainage channel 110 around it in turn, causing it to flow in a directional, relay, and accelerated manner toward the siphon drainage pipe 120. This is equivalent to indirectly expanding the influence radius of the siphon drainage pipe 120, thereby comprehensively solving the problem of water retention and slow discharge in the central area of ​​the siphon drainage system, and achieving the effect of improving the overall drainage efficiency of the system.

[0118] This implementation addresses the drainage problem of large-span planting roofs. Building upon the existing siphon drainage system, an electrically driven relay drainage device 202 is strategically positioned at the node of the drainage trough 110 in the central area. A motor assembly 260 is installed on the surface, driven by a fixed power source or green energy sources such as photovoltaic or wind power generation components. This motor assembly 260 rotates the second impeller 220 underground, converting electrical energy into mechanical energy. A gearbox 232 at the bottom of the motor assembly 260 increases the rotational speed of the drive shaft 231, thus efficiently driving the rotation of the second impeller 220. During rotation, the second impeller 220 at the bottom effectively draws in water from the other three directions of the connector assembly 240 before outputting it in the designated direction. By continuously installing the electrically driven relay drainage device 202, infiltrated water from the central area of ​​the system can be continuously discharged towards the siphon drainage pipe 120 through relay drainage, thereby expanding the radius of influence of the siphon effect. This comprehensively solves the problem of infiltrated water retention and slow discharge in the central area of ​​the siphon drainage system, ultimately improving the overall drainage efficiency of the system.

[0119] In this embodiment, the drainage channel 110 is laid out as a drainage network according to the shape and structure of the roof slab. At locations in the drainage network exceeding the siphon effect radius of the siphon drain pipe 120, a seepage-type siphon compensation device 100 and a relay drainage device are used to replace part of the drainage channel joint 140. The seepage water within a certain area of ​​the drainage network, starting from the seepage-type siphon compensation device 100, flows directionally and rapidly towards the siphon drain pipe 120 after being driven by several relay drainage devices. This indirectly expands the influence radius of the siphon drain pipe 120, thereby solving the problem of seepage water stagnation and slow discharge in the central area when the siphon drainage system is applied to a large-span roof slab, achieving the effect of improving the overall drainage efficiency of the system. Furthermore, at locations in the drainage network where non-right-angle connections are required or where protruding structural components on the roof slab need to be avoided, the drainage channel adapter 300 of Embodiment 4 can be used to connect the drainage channel 110.

[0120] In this embodiment, the relay drainage device includes a water-driven relay drainage device 201 and an electric-driven relay drainage device 202. Along the infiltration water flow path of the drainage network, the electric-driven relay drainage device 202 is preferentially installed near the siphon drainage pipe 120, the water-driven relay drainage device 201 is preferentially installed near the leakage-type siphon compensation device 100, and the water-driven relay drainage device 201 is preferentially installed near the rainwater discharge pipe network 130. Other locations along the path may alternate between the electric-driven relay drainage device 202 and the water-driven relay drainage device 201.

[0121] In this embodiment, a water collection plate 150 is laid within the area enclosed by the drainage channel 110, and the siphon drainage pipe 120 is connected to the water storage and drainage module 160 through the drainage network. The siphon drainage pipe 120 generates a siphon effect, quickly collecting the infiltrated water in the drainage network to the water storage and drainage module 160, so as to realize the rapid discharge of rainwater and subsequent secondary utilization. The drainage channel 110 includes straight drainage channels and flexible drainage channels, etc.; the drainage channel connector 140 includes three-way drainage channels and four-way drainage channels, etc. The relevant existing technologies involved in the application of the large-span roof slab siphon drainage system can be referred to Chinese patents CN105696748A - A PDS zero-slope protection siphon drainage collection system, CN109279711A - A green roof rainwater management system, CN113775020A - A rainwater management system, and similar systems, which will not be elaborated here.

[0122] Obviously, the above embodiments of the present invention are merely examples to clearly illustrate the technical solutions of the present invention, and are not intended to limit the specific implementation of the present invention. Any modifications, equivalent substitutions, and improvements made within the spirit and principles of the claims of the present invention should be included within the protection scope of the claims of the present invention.

Claims

1. A large-span roof slab siphon drainage system, comprising a drainage trough, a drainage trough connector, and a siphon drainage pipe; the drainage troughs are connected through the drainage trough connector to form a drainage network; the siphon drainage pipe is connected to the edge of the drainage network; characterized in that, In areas of the drainage network far from the siphon drain pipe, there are leakage siphon compensation devices and relay drainage devices. The leakage siphon compensation device is used to quickly discharge the rainwater collected inside into the drainage trough, and push the seepage water inside the drainage trough to the siphon drain pipe. The relay drainage device is used to collect and agitate the seepage water inside the drainage trough, and drive the seepage water inside the drainage trough to the siphon drain pipe. The relay drainage device includes a drive assembly, a second impeller body, a transmission assembly, and a connector assembly. The drive assembly is located above the connector assembly, and the second impeller body is located inside the connector assembly. The drive assembly and the second impeller body are linked through the transmission assembly. The connector assembly has a connector inlet and a connector outlet. The drive assembly drives the second impeller body to rotate through the transmission assembly. The second impeller body agitates the water flow inside the connector assembly, causing it to accelerate from the connector inlet to the connector outlet. The drive assembly is a first impeller body, including a first housing and a first impeller; the first housing is turbine-shaped, and the first housing is provided with an inlet and an outlet; The first impeller is installed inside the first housing, and the shaft of the first impeller is connected to the transmission assembly. External water flows into the first housing through the inlet, driving the first impeller and its shaft to rotate, thereby causing the transmission assembly to rotate.

2. The large-span roof slab siphon drainage system according to claim 1, characterized in that, The leakage siphon compensation device includes a bucket lid, a collection bucket, and a filter basket, a water pipe, and a first siphon pipe installed inside the collection bucket. Rainwater enters the collection bucket from top to bottom through the bucket lid, the filter basket, and the water pipe. The rainwater in the collection bucket enters the first siphon pipe through the first inlet. When the rainwater reaches the highest point of the first siphon pipe, the first siphon pipe generates a siphon effect and quickly discharges the rainwater from the first outlet located on the lower side wall of the collection bucket.

3. A large-span roof slab siphon drainage system according to claim 2, characterized in that, The lower part of the collection bucket is provided with a partition plate, which is used to divide the internal space of the collection bucket into an upper area and a lower area. The upper area is used to store rainwater flowing in from the water pipe, and the lower area is used to install the pipe of the first siphon pipe.

4. A large-span roof slab siphon drainage system according to claim 3, characterized in that, The first siphon pipe includes an inlet section, a U-shaped section, a diversion section, and an outlet section connected in series. One end of the inlet section is the first inlet. The inlet section and the U-shaped section are located in the upper region of the collection bucket. The diversion section passes through the partition plate and diverts the rainwater in its pipe. The outlet section is located in the lower region of the collection bucket, and one end of the outlet section is the first outlet.

5. A large-span roof slab siphon drainage system according to claim 2, characterized in that, The filter basket is filled with filter media, which is used to filter impurities in rainwater; a second mesh grid is provided at the bottom of the filter basket, which is used to support the filter media and support the bottom of the filter basket; the water pipe is provided with a second inlet and a second outlet, the second inlet is located at the bottom of the filter basket, and the second outlet is set off from the first siphon pipe.

6. A large-span roof slab siphon drainage system according to claim 1, characterized in that, The second impeller body includes a second housing, a second rotor, and a second blade; the second housing is embedded inside the connector assembly and has an inlet and an outlet, the inlet communicating with the connector inlet and the outlet communicating with the connector outlet; the second rotor is installed inside the second housing, one end of the second blade is embedded in the circumferential surface of the second rotor, and the other end of the second blade touches the second housing; the transmission assembly drives the second rotor to rotate, and the second blade slides on the second housing, so that the water flow from the connector inlet is drawn into the second housing and accelerated to converge at the connector outlet.

7. A large-span roof slab siphon drainage system according to claim 1, characterized in that, The relay drainage device also includes a second sleeve, which is sleeved on the outside of the transmission assembly; the inner cavity of the second sleeve is connected to the inner cavity of the first impeller body and the inner cavity of the second impeller body; after the external water flow drives the first impeller body to rotate, it enters the inner cavity of the second impeller body through the inner cavity of the second sleeve; the inner wall of the second sleeve is funnel-shaped and the surface is provided with spiral grooves or spiral protrusions for forming a spiral water flow.

8. A large-span roof slab siphon drainage system according to claim 1, characterized in that, It also includes a drain adapter, which includes a drain pipe and a first connector and a second connector located at both ends thereto; the first connector and the second connector are used to connect the drain pipe and the drain trough respectively, and the two ends of the first connector and the second connector respectively include a first interface for connecting the drain trough and a second interface for connecting the drain pipe.

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