sand collection stormwater well

Abstract

The utility model discloses a kind of sand collecting rainwater well, belong to rainwater well technical field, and the sand collecting rainwater well includes well body, water collecting pool, sand collecting box and rainwater flow channel, water collecting pool is set in well body and side wall is communicated with drain pipe;Sand collecting box is set in well body and is close to water collecting pool setting, sand collecting box is opened with water pass hole, water pass hole is used to communicate water collecting pool and sand collecting box;Rainwater flow channel is set along the inner wall of well body, and the water outlet end of rainwater flow channel is connected to the top opening of sand collecting box, and rainwater flow channel is used to guide sand and stone carried by rainwater runoff into sand collecting box.The utility model can ensure that sand and stone precipitation process occurs before drainage process, so that sand and stone is always intercepted in special sand collecting box, and separated clean water is discharged through channel, which fundamentally blocks the path of sand and stone into downstream pipeline, thereby effectively solving the problem of sand and stone discharged with water flow in traditional rainwater well, while ensuring sand setting effect, and reducing system load.

Description

Technical Field

[0001] This utility model relates to the field of rainwater well technology, and in particular to a sand-collecting rainwater well. Background Technology

[0002] Storm drains are the initial water intake point in urban stormwater drainage systems, playing a crucial role in collecting rainwater runoff. Their collection efficiency and water quality directly affect the overall performance of the stormwater system. Insufficient storm drain capacity can prevent the system from achieving full-pipe outflow, reducing drainage efficiency. Furthermore, excessively high sediment content in the incoming rainwater can cause siltation inside the pipes, affecting not only flow capacity but also significantly increasing the workload for maintenance and dredging.

[0003] In actual operation, rainwater runoff often carries a large amount of particulate matter from road surfaces or green belts, leading to severe sediment deposition in the storm drain inlets. To alleviate this problem, the conventional approach is to install sedimentation troughs at the bottom of the storm drain inlets, typically by lowering the bottom plate of the inlet by 0.3 to 0.5 meters, relying on gravity to achieve initial sediment settling. However, this method has very limited sediment settling effect. Under high flow velocities, bottom sediment is prone to resuspension and splashing, causing the deposited sediment to be flushed back into downstream pipes, exacerbating system blockage and limiting actual sediment discharge and maintenance efficiency. Utility Model Content

[0004] This invention aims to solve at least one of the technical problems existing in the prior art. To this end, this invention proposes a sand-collecting rainwater well, which can separate and collect sand and gravel in rainwater runoff, reducing the probability of sand and gravel falling into the rainwater pipe network, and reducing the system load while ensuring the sand settling effect.

[0005] According to an embodiment of the present invention, a sand-collecting rainwater well includes: a well body; a water collection pool disposed within the well body, with a drain pipe connected to the side wall of the water collection pool; a sand collection box disposed within the well body and closely attached to the water collection pool, the sand collection box having a water passage hole for connecting the water collection pool and the sand collection box; and a rainwater flow channel disposed around the inner wall of the well body, the outlet end of the rainwater flow channel being connected to the top opening of the sand collection box, the rainwater flow channel being used to guide rainwater runoff to guide the sand and gravel carried by the rainwater runoff into the sand collection box.

[0006] It has at least the following beneficial effects: A water collection tank is located inside the well, with its sidewall connected to a drainage pipe. A sand collection box is located inside the well and is positioned close to the water collection tank, with a water passage opening in its wall to allow communication with the water collection tank. A rainwater channel is arranged around the inner wall of the well, with its outlet connected to the top opening of the sand collection box. Rainwater flows into the well and is first received and guided by the rainwater channel on the inner wall. The rainwater channel smoothly guides the water flow to the top opening of the sand collection box. The sand and gravel carried by the water flow enter the sand collection box and settle at its bottom. Simultaneously, the rainwater in the sand collection box flows through the water passage opening on the sand collection box wall into the adjacent water collection tank and is then discharged. This ensures that the sand and gravel sedimentation process occurs before the drainage process, keeping the sand and gravel trapped in the dedicated sand collection box. The separated clean water is discharged through the channel, fundamentally blocking the path of sand and gravel into the downstream pipes. This effectively solves the problem of sand and gravel being discharged with the water flow in traditional rainwater wells, reducing the system load while ensuring the sand settling effect.

[0007] According to some embodiments of the present invention, a flap is also included. The flap is rotatably disposed at the outlet end of the rainwater channel via a rotating shaft. In its natural state, the flap at least partially covers the top opening of the sand collection box. The flap is used to receive the incoming water from the rainwater channel and slow down the impact speed of the water flow into the sand collection box.

[0008] According to some embodiments of the present invention, a limiting member is also included. The limiting member is disposed inside the well body and located below the rotating shaft. The limiting member is used to limit the rotation position of the flap.

[0009] According to some embodiments of this utility model, the sand collection box can be pulled out and installed in the well body in the vertical direction, and a handle is provided on the wall of the sand collection box.

[0010] According to some embodiments of the present invention, the inlet end of the rainwater channel is higher than the outlet end of the rainwater channel.

[0011] According to some embodiments of this utility model, the cross-sectional area of ​​the rainwater channel gradually increases along the direction of water flow.

[0012] According to some embodiments of this utility model, the longitudinal section of the rainwater channel is trapezoidal.

[0013] According to some embodiments of the present invention, at least a portion of the rainwater channel is horizontally arranged.

[0014] According to some embodiments of this utility model, a filter screen is provided on the water passage hole, and the filter screen is used to intercept sand and gravel entering the water collection tank.

[0015] According to some embodiments of the present invention, the top opening of the well body is covered with an openable cover plate.

[0016] Additional aspects and advantages of this invention will be set forth in part in the description which follows, and in part will be obvious from the description, or may be learned by practice of the invention. Attached Figure Description

[0017] The present invention will be further described below with reference to the accompanying drawings and embodiments, wherein: Figure 1 This is a plan view of the sand-collecting rainwater well according to an embodiment of the present utility model; Figure 2 for Figure 1 Longitudinal cross-section view; Figure 3 for Figure 2 Section 1-1 in the diagram; Figure 4 for Figure 2 Section 2-2 in the diagram.

[0018] Icon labels: Well body 1, cover plate 11; Water collection tank 2, drain pipe 21; Sand collection box 3, water passage hole 31, filter screen 311, handle 32; Rainwater channel 4, horizontal section 41, diversion section 42; Flip-board 5; Limiting component 6. Detailed Implementation

[0019] In the description of this utility model, it should be understood that the directional descriptions, such as up, down, front, back, left, right, etc., indicate the directional or positional relationship based on the directional or positional relationship shown in the accompanying drawings. They are only for the convenience of describing this utility model and simplifying the description, and do not indicate or imply that the device or element referred to must have a specific orientation, or be constructed and operated in a specific orientation. Therefore, they should not be construed as limitations on this utility model.

[0020] In the description of this utility model, the use of "first" and "second" is only for the purpose of distinguishing technical features and should not be construed as indicating or implying relative importance or implicitly indicating the number of technical features or the order of the technical features.

[0021] In the description of this utility model, unless otherwise explicitly defined, terms such as "setting," "installation," and "connection" should be interpreted broadly, and those skilled in the art can reasonably determine the specific meaning of the above terms in this utility model in conjunction with the specific content of the technical solution.

[0022] Reference Figure 1This utility model discloses a sand-collecting rainwater well, including a well body 1, a water collection pool 2, a sand collection box 3, and a rainwater channel 4. The water collection pool 2 is located inside the well body 1, and a drain pipe 21 is connected to the side wall of the water collection pool 2. The sand collection box 3 is located inside the well body 1 and is set close to the water collection pool 2. The sand collection box 3 has a water passage hole 31, which is used to connect the water collection pool 2 and the sand collection box 3. The rainwater channel 4 is arranged around the inner wall of the well body 1, and the outlet end of the rainwater channel 4 is connected to the top opening of the sand collection box 3. The rainwater channel 4 is used to guide the rainwater runoff to guide the sand and gravel carried by the rainwater runoff into the sand collection box 3.

[0023] like Figure 1 and Figure 2 As shown, the water collection tank 2 is located inside the well body 1, and its side wall is connected to the drain pipe 21. The sand collection box 3 is located inside the well body 1 and is set close to the water collection tank 2. The box wall has a water passage hole 31 that can connect with the water collection tank 2. The rainwater flow channel 4 is arranged around the inner wall of the well body 1, and its outlet end is connected to the top opening of the sand collection box 3. Rainwater runoff flows into well body 1 and is first received and guided by the rainwater channel 4 on the inner wall of well body 1. The rainwater channel 4 smoothly guides the water flow to the top opening of the sand collection box 3. The sand and gravel carried by the water flow enter the sand collection box 3 and are deposited at the bottom of the sand collection box. At the same time, the rainwater in the sand collection box 3 flows into the adjacent water collection pool 2 through the water passage 31 on the wall of the sand collection box 3 and is then discharged. This ensures that the sand and gravel sedimentation process occurs before the drainage process, so that the sand and gravel are always trapped in the dedicated sand collection box 3, while the separated clean water is discharged through the channel, which fundamentally blocks the path of sand and gravel into the downstream pipe, thereby effectively solving the problem of sand and gravel being discharged with the water flow in traditional rainwater wells, and reducing the system load while ensuring the sand settling effect.

[0024] In some specific embodiments of this utility model, a flap 5 is also included. The flap 5 is rotatably disposed at the outlet end of the rainwater channel 4 via a rotating shaft. In its natural state, the flap 5 at least partially covers the top opening of the sand collection box 3. The flap 5 is used to receive the incoming water from the rainwater channel 4 and slow down the impact speed of the water flow into the sand collection box 3.

[0025] like Figure 2 and Figure 3As shown, the flap 5 is horizontally mounted between the outlet of the rainwater channel 4 and the top opening of the sand collection box 3 via a rotating shaft. In its natural state, the flap 5 maintains a downward tilt or horizontal position due to its own weight. The surface of the flap 5 at least partially covers the top opening of the sand collection box 3, forming a movable mechanical barrier. It should be noted that the near edge of the flap 5 maintains a certain distance from the outlet of the rainwater channel 4 to ensure that the water flow can accurately impact the surface of the flap 5, while its far end hangs above the top opening of the sand collection box 3. When the water flow in the rainwater channel 4 impacts the surface of the flap 5, the kinetic energy of the water is converted into mechanical energy that drives the flap 5 to rotate around the rotating shaft. This effectively consumes and disperses the concentrated impact force of the water flow, allowing the water flow to spread gently and flow into the sand collection box 3 at a low speed along the surface of the flap 5. This keeps the sediment at the bottom of the box in a stable hydraulic environment, avoiding the splashing and re-carrying of bottom sediment caused by the water flow impact, and ensuring the continuous and stable sand storage capacity of the sand collection box 3.

[0026] On the other hand, the inclined structure of the flap 5 increases the effective settling area and extends the water flow path, thereby enhancing the separation and sedimentation efficiency of particulate matter in addition to kinetic energy dissipation, thus improving the solid-liquid separation efficiency of the sand collection box 3.

[0027] Specifically, the two ends of the rotating shaft are fixed to the inner wall of the well body 1 through waterproof bearing seats, so that the flap 5 can rotate flexibly within a certain angle range.

[0028] Specifically, the flap 5 is made of corrosion-resistant metal material, and ribs can be added to the surface of the flap to enhance its impact resistance.

[0029] In some specific embodiments of this utility model, a limiting member 6 is also included. The limiting member 6 is disposed inside the well body 1 and located below the rotating shaft. The limiting member 6 is used to limit the rotational position of the flap 5. Figure 2 As shown, the limiting member 6 is fixedly installed in the area below the rotating shaft to limit the maximum rotation angle of the flap 5. That is, when the flap 5 rotates to a specific position under the impact of water flow, its plate or connecting part will reliably contact the limiting member 6, thereby preventing the flap 5 from opening further excessively, ensuring that the flap 5 always works within the preset safe stroke, preventing mechanical damage or functional failure caused by excessive rotation angle. At the same time, by limiting the maximum opening, the effective blocking area of ​​the flap 5 on the opening of the sand collection box 3 is maintained, so that the water flow buffering and anti-splashing functions remain stable.

[0030] In some other specific embodiments of this utility model, multiple limiting members 6 are provided, and these limiting members 6 are arranged at different positions below the rotating shaft along the axial direction of the rotating shaft. For example... Figure 3 As shown, two limiting members 6 are provided on the inner left side of the sand collection box 3. Each limiting member 6 is an independently set protrusion or stop.

[0031] In some specific embodiments of this utility model, the sand collection box 3 is installed inside the well body 1 in a vertically slidable manner, and a handle 32 is provided on the wall surface of the sand collection box 3. For example... Figure 2 and Figure 3 As shown, the sand collection box 3 is installed inside the well body 1 in a pull-out assembly manner. The sand collection box 3 has a handle 32 on at least one side of the wall. Therefore, the sand collection box 3 can be pulled out of the well as a whole through the opening at the top of the well body 1. The cleaning and maintenance of sand and gravel can be completed without personnel going down into the well, which simplifies the daily maintenance process and reduces the operation risk and time cost.

[0032] Furthermore, the inner wall of the well body 1 is equipped with guide rails and roller sets correspondingly installed on both sides of the sand collection box 3. The guide rails are made of corrosion-resistant steel and extend along the height of the well body 1 on its inner wall. The inner wall of the sand collection box 3 is equipped with ergonomically designed handles 32, which are embedded in the box wall to avoid obstructing water flow. When cleaning is required, maintenance personnel can hook the handles 32 through the opening at the top of the well and smoothly pull the sand collection box 3 out of the well along the guide rails.

[0033] Furthermore, the bottom of the sand collection box 3 is also equipped with a positioning pin hole, which cooperates with the elastic positioning pin at the bottom of the well. Under normal working conditions, it can prevent the box from being accidentally displaced. This not only enables the quick loading and unloading of the sand collection box 3, but also ensures that the stability of the box is not affected when water flows through it. This improves maintenance efficiency and ensures the reliability of system operation.

[0034] In some specific embodiments of this utility model, the inlet end of the rainwater channel 4 is higher than the outlet end of the rainwater channel 4. For example... Figure 2 As shown, at least part of the rainwater channel 4 adopts an inclined design, so that the height of its inlet end is higher than that of its outlet end, forming a guiding path with a height difference. In this specific embodiment, the rainwater channel 4 is inclined to the lower right, so that the rainwater runoff can accelerate its flow by its own gravity after entering the rainwater channel 4, ensuring that the sand and gravel carried by the water has sufficient transport power to be smoothly pushed to the sand collection box 3 at the end, while effectively preventing rainwater from stagnating or backflowing in the channel, ensuring smooth drainage.

[0035] It should be noted that by precisely controlling the inclination angle of the flow channel, it is possible to meet the flow rate requirements for sand and gravel transportation while avoiding severe scouring in the sand collection box 3 due to excessive flow rate, thus achieving the best balance between transportation efficiency and settling effect.

[0036] In some specific embodiments of this utility model, the cross-sectional area of ​​the rainwater channel 4 gradually increases along the water flow direction. For example... Figure 2As shown, the cross-sectional area of ​​the rainwater channel 4 gradually increases from left to right, forming a gradually expanding channel structure. It should be noted that, based on the principle of continuity equation in fluid mechanics, when water enters the gradually expanding channel, the flow velocity gradually decreases as the flow area increases. On the one hand, this effectively weakens the impact force of the water flow, preventing high-speed water flow from scouring and splashing the settled silt in the sand collection box 3. On the other hand, the smooth transition of the water flow from a high-speed transport state to a low-speed settling state allows the sand and gravel to complete preliminary classification before entering the sand collection box 3, effectively optimizing the solid-liquid separation performance of the entire system.

[0037] In some specific embodiments of this utility model, the longitudinal section of the rainwater channel 4 is trapezoidal. For example... Figure 2 and Figure 4 As shown, the longitudinal section of the rainwater channel 4 is a right-angled trapezoid, and the sidewalls of the rainwater channel 4, which gradually narrow from top to bottom, form a stable flow channel. The trapezoidal section increases the open area at the top of the rainwater channel 4 to efficiently receive rainwater runoff, while the narrowing structure at the bottom maintains the necessary water flow depth. This ensures both water storage capacity and sufficient flow velocity during drainage to prevent siltation, achieving an organic unity of collection, sediment transport, and anti-clogging functions, thereby improving the adaptability and reliability of the rainwater well under different rainfall intensities.

[0038] In some specific embodiments of this utility model, at least a portion of the rainwater channel 4 is horizontally arranged. For example... Figures 2 to 4 As shown, the rainwater channel 4 adopts a multi-segment layout combining horizontal sections 41 and inclined sections. The left side wall of the well body 1 has a horizontally extending section 41, with guide sections 42 inclined downwards towards the sand collection box 3 at both ends. When rainwater enters the rectangular rainwater well, the water flowing into the horizontal section 41 experiences an initial reduction in flow velocity and water diffusion, allowing some heavier particles to undergo pre-settling. Subsequently, through the inclined guide sections 42 at both ends, the water is re-accelerated under gravity and smoothly guided to the top opening of the sand collection box 3.

[0039] In some specific embodiments of this utility model, a filter screen 311 is provided on the water passage hole 31, and the filter screen 311 is used to intercept sand and gravel entering the water collection pool 2.

[0040] like Figure 4 As shown, multiple water passage holes 31 are provided, and the multiple water passage holes 31 are evenly distributed on the adjacent walls of the sand collection box 3 and the water collection pool 2. Among them, the filter screen 311 covers the surface of the water passage holes 31. Its mesh size ensures that, while ensuring smooth water flow, it can effectively intercept fine particles that have not completely settled in the sand collection box 3, preventing them from entering the water collection pool 2 and the downstream drain pipe 21 with the water flow. Through staged filtration, the siltation pressure of the subsequent pipe network is reduced, ensuring that the system maintains the best filtration performance for a long time.

[0041] It should be noted that the filter screen 311 is woven from corrosion-resistant metal or engineering plastic material and is firmly fixed to the periphery of the water passage hole 31 by buckles or pressure rings to form a reliable sealing connection.

[0042] In some specific embodiments of this utility model, the top opening of the well body 1 is covered by an openable cover plate 11. For example... Figure 2 and Figure 4 As shown, the top opening of the manhole body 1 is covered by an openable cover plate 11. The cover plate 11 is movably connected to the top of the manhole body 1 via a hinge mechanism or a fully movable assembly method. The cover plate 11 adopts a hollow structure that coordinates with the surrounding paving, ensuring road traffic safety while also serving the function of rainwater collection.

[0043] The following is based on Figures 1 to 4 The structure shown further illustrates the technical solution of this utility model embodiment.

[0044] In one specific embodiment of this utility model, the well body 1 adopts a rectangular cross-section structure, and the sand collection box 3 is arranged close to the two adjacent corners on the right side of the well body 1. The left wall of the sand collection box 3 and the inner wall of the well body 1 together form the left-side water collection pool 2. Multiple sets of water passage holes 31 are arrayed on the left wall, and each water passage hole 31 is fitted with a filter screen 311. The top of the right wall of the sand collection box 3 is provided with an ergonomic handle 32 for easy operation. The top of the water collection pool 2 is provided with a U-shaped rainwater channel 4, which consists of a horizontal section 41 and two guide sections 42. The horizontal section 41 is arranged horizontally along the left inner wall of the well body 1, and the two guide sections 42 are respectively connected to the front and rear ends of the horizontal section 41, and slope downward along the front and rear inner walls of the well body 1 towards the top opening of the sand collection box 3 on the right side. The flap 5 extends in the front-rear direction and is hinged to the water outlet of the guide section 42 through a pivot. In its natural state, the flap 5 partially blocks the top opening of the sand collection box 3. The sand collection box 3 has horizontally extending inward protruding limiting members 6 on its side wall to limit the maximum opening angle of the flap 5. As a result, rainwater is buffered by the left horizontal flow channel and then diverted to the front and rear guide sections 42. After being accelerated by the guide, it impacts the flap 5. After the kinetic energy is reduced, it falls into the sand collection box 3. After the sand and gravel are deposited, the clean water enters the left water collection pool 2 through the filter screen 311. The whole system forms a highly efficient system integrating collection, sedimentation, filtration and drainage.

[0045] In another specific embodiment of this utility model, the well body 1 adopts a circular cross-section structure, and the sand collection box 3 is a fan-shaped box with the same center as the well body 1, which is set close to the inner wall of the well body 1. Several water passage holes 31 are evenly opened on the radial wall plate of the sand collection box 3, and stainless steel filter screens 311 are embedded in the holes. This wall plate and the inner wall of the well body 1 together form a circular water collection pool 2. An arc-shaped handle 32 is provided on the top of the sand collection box 3 for convenient circular operation. An annular rainwater flow channel 4 is provided on the top of the well body 1. This flow channel consists of guide sections 42. The radial guide sections 42 are arranged along the inner wall of the well body 1 and slope downwards towards the center, extending to the top opening of the sand collection box 3. Below the outlet end of each radial guide section 42, a fan-shaped flap 5 is hinged via a radial pivot. In its natural state, the flap 5 partially blocks the top opening of the sand collection box 3. An arc-shaped limiting protrusion is provided on the inner wall of the sand collection box 3 to limit the opening angle of the flap 5. Rainwater is collected through a ring-shaped channel and then evenly distributed through a guide section 42. After impacting the flap 5, it falls into the circumferentially arranged sand collection box 3. After the sand and gravel settle, the clean water passes through the filter screen 311 into the central water collection pool 2, and is finally discharged through the drain pipe 21. This design achieves 360° uniform water distribution, avoids local scouring, and is particularly suitable for multi-directional water inflow scenarios such as road intersections, demonstrating excellent fluid symmetry and space utilization efficiency.

[0046] The technical features of the above embodiments can be combined in any way. For the sake of brevity, not all possible combinations of the technical features in the above embodiments are described. However, as long as there is no contradiction in the combination of these technical features, they should be considered to be within the scope of this specification.

[0047] Of course, this utility model is not limited to the above-described embodiments. Those skilled in the art can make equivalent modifications or substitutions without departing from the spirit of this utility model. All such equivalent modifications or substitutions are included within the scope defined by the claims of this application.

Claims

1. A sand-collecting rainwater well, characterized in that, include: Well body (1); A water collection tank (2) is installed inside the well body (1), and a drain pipe (21) is connected to the side wall of the water collection tank (2). A sand collection box (3) is set inside the well body (1) and close to the water collection pool (2). The sand collection box (3) has a water passage hole (31) for connecting the water collection pool (2) and the sand collection box (3). The rainwater channel (4) is arranged around the inner wall of the well body (1). The outlet end of the rainwater channel (4) is connected to the top opening of the sand collection box (3). The rainwater channel (4) is used to guide the rainwater runoff to guide the sand and gravel carried by the rainwater runoff into the sand collection box (3).

2. The sand-collecting rainwater well according to claim 1, characterized in that, It also includes a flap (5), which is rotatably mounted at the outlet end of the rainwater channel (4) via a rotating shaft. In its natural state, the flap (5) at least partially covers the top opening of the sand collection box (3). The flap (5) is used to receive the incoming water from the rainwater channel (4) and slow down the impact speed of the water flow into the sand collection box (3).

3. The sand-collecting rainwater well according to claim 2, characterized in that, It also includes a limiting member (6), which is disposed inside the well body (1) and located below the rotating shaft. The limiting member (6) is used to limit the rotation position of the flap (5).

4. The sand-collecting rainwater well according to claim 3, characterized in that, The sand collection box (3) can be pulled out and installed in the well body (1) in the up and down direction, and a handle (32) is provided on the wall of the sand collection box (3).

5. The sand-collecting rainwater well according to claim 3, characterized in that, The inlet end of the rainwater channel (4) is higher than the outlet end of the rainwater channel (4).

6. The sand-collecting rainwater well according to claim 5, characterized in that, The cross-sectional area of ​​the rainwater channel (4) gradually increases along the direction of water flow.

7. The sand-collecting rainwater well according to claim 6, characterized in that, The longitudinal section of the rainwater channel (4) is trapezoidal.

8. The sand-collecting rainwater well according to claim 7, characterized in that, At least a portion of the rainwater channel (4) is horizontally arranged.

9. The sand-collecting rainwater well according to claim 8, characterized in that, A filter screen (311) is provided on the water passage (31) to intercept sand and gravel entering the water collection pool (2).

10. The sand-collecting rainwater well according to any one of claims 1 to 9, characterized in that, The top opening of the well body (1) is covered with an openable cover plate (11).

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