A multi-layer filterable rainwater drainage pipe

Abstract

The utility model discloses a rainwater drainage pipeline of multilayer filtration, including gradually setting up in proper order and the pipe diameter gradually increased inner layer pipe, middle layer pipe and outer layer pipe, the length direction of inner layer pipe, middle layer pipe and outer layer pipe all are parallel with horizontal direction, and the axis is located in same vertical plane with horizontal plane, and the pipe wall of upper portion is in proper order closely, inner layer pipe and middle layer pipe all are the seepage pipe of pipe wall with a plurality of seepage holes, the pore size of any seepage hole of inner layer pipe all are greater than the pore size of any seepage hole of middle layer pipe, and the interval of every two adjacent seepage holes of inner layer pipe all are greater than the interval of every two adjacent seepage holes of middle layer pipe, the utility model discloses utilize pipeline self filtration structure and water flow scouring effect, and will particle classification intercept, and introduce downstream inspection well designated area, and it is convenient to clear and dig, need not external power, rely on the hydraulic action of rainwater, also solved the source site condition and the restriction of end space, and the applicability is wider, basically utilize the space that pipeline laying needs to occupy, almost do not increase space additionally.

Description

Technical Field

[0001] This utility model relates to the field of rainwater drainage technology, and in particular to a rainwater drainage pipe with multi-layer filtration capability. Background Technology

[0002] Silt in drainage pipe networks has always been a key focus and challenge in maintenance, especially in rainwater pipes. Due to the scouring effect of surface runoff, sediment is carried into the pipes. If maintenance is not timely, silt will form, affecting the flow capacity of the drainage pipes. Furthermore, the silt will be washed downstream with rainwater and eventually enter the receiving water body from the outlet, causing water pollution. Therefore, how to effectively limit silt in rainwater drainage pipes has become an important aspect of water environment management.

[0003] Besides increasing maintenance frequency, commonly used technologies mainly include source-level sponge city layout and end-of-pipe interception, storage, and treatment. However, each has its limitations. Source-level sponge city layout generally involves sunken transformation of surrounding green areas, which requires a certain amount of green space in the catchment area that is relatively dispersed. If the area is almost entirely a hardened underlying surface, or if the green area is sufficient but very concentrated, source-level sponge city layout is not feasible. End-of-pipe construction, such as setting up interception wells, storage tanks, or treatment devices, requires sufficient above-ground or underground space. Although there are now technologies for setting up storage tanks at the bottom of rivers, the investment is high and there are also certain limitations.

[0004] Therefore, how to effectively purify rainwater runoff when there is no greenery at the source, no storage space at the end, or limited construction environment has become a technical problem that urgently needs to be solved by those skilled in the art. Utility Model Content

[0005] In view of the above-mentioned defects of the prior art, the present invention provides a rainwater drainage pipe with multi-layer filtration, the purpose of which is to achieve effective purification of rainwater runoff when there is no greening at the source site, no storage space at the end, or the construction environment is limited.

[0006] To achieve the above objectives, this utility model discloses a multi-layered rainwater drainage pipe, comprising an inner pipe, a middle pipe, and an outer pipe that are sequentially nested and whose diameters gradually increase.

[0007] The length directions of the inner tube, the middle tube, and the outer tube are all parallel to the horizontal direction, and their axes are located in the same vertical plane perpendicular to the horizontal plane. The upper tube walls are tightly attached to each other.

[0008] Both the inner tube and the middle tube are seepage tubes with several seepage holes in their walls;

[0009] The diameter of any of the seepage holes in the inner layer tube is larger than the diameter of any of the seepage holes in the middle layer tube.

[0010] The distance between any two adjacent seepage holes in the inner layer tube is greater than the distance between any two adjacent seepage holes in the middle layer tube.

[0011] Preferably, one downstream end of the inner tube, the middle tube, and the outer tube is connected to the inspection well;

[0012] Inside the inspection well, an arc-shaped mud trough is provided corresponding to the water outlet position of the middle layer pipe;

[0013] One end of the arc-shaped mud trough is attached to the water outlet end of the middle layer pipe, serving as an extension of the middle layer pipe within the inspection well. The other end is equipped with a detachable weir plate, which blocks and collects sediment flowing with the water flow in the inner layer pipe and the middle layer pipe.

[0014] Preferably, the detachable weir plate is fixed to the inner wall of the inspection well by a weir plate bracket.

[0015] Preferably, the cross-sections of the inner tube, the middle tube, and the outer tube are all circular, triangular, or rectangular.

[0016] The beneficial effects of this utility model are:

[0017] This invention utilizes the pipeline's own filtration structure and the flushing effect of water flow to classify and intercept particles in a water transport pipeline, directing them to a designated area in the downstream inspection well for easy cleaning. No external power is required throughout the process; it relies solely on the hydraulic force of rainwater. Furthermore, it overcomes the limitations of source site conditions and end-point space, making it more widely applicable. It primarily utilizes the space already occupied by the pipeline itself, requiring almost no additional space.

[0018] The following will further explain the concept, specific structure and technical effects of this utility model in conjunction with the accompanying drawings, so as to fully understand the purpose, features and effects of this utility model. Attached Figure Description

[0019] Figure 1 A cross-sectional schematic diagram of an embodiment of the present invention is shown.

[0020] Figure 2 This diagram shows a partial cross-sectional view of an embodiment of the present invention.

[0021] Figure 3 The diagram shows a structural schematic of the inner tube in one embodiment of the present invention.

[0022] Figure 4 The diagram shows a structural schematic of the middle layer tube in one embodiment of the present invention.

[0023] Figure 5 This diagram shows a state diagram of an embodiment of the present invention in stage 1.

[0024] Figure 6 This diagram shows a state diagram of an embodiment of the present invention in stage 2.

[0025] Figure 7 This diagram shows a state diagram of stage 3 of an embodiment of the present invention.

[0026] Figure 8 This diagram illustrates the structural connection between the inner tube, middle tube, outer tube, and inspection well in one embodiment of the present invention.

[0027] Figure 9 This diagram illustrates the structure of the connection between the inspection well and the inner, middle, and outer pipes in one embodiment of the present invention. Detailed Implementation

[0028] Example: Figures 1 to 4 As shown, a multi-layered rainwater drainage pipe includes an inner pipe 1, a middle pipe 2, and an outer pipe 3, which are sequentially nested and have gradually increasing diameters.

[0029] The length directions of the inner tube 1, the middle tube 2 and the outer tube 3 are all parallel to the horizontal direction, and their axes are located in the same vertical plane that is perpendicular to the horizontal plane. The upper tube walls are tightly attached to each other.

[0030] Both the inner tube 1 and the middle tube 2 are seepage tubes with several seepage holes 4 in their walls;

[0031] The diameter of any seepage hole 4 in the inner layer pipe 1 is larger than the diameter of any seepage hole 4 in the middle layer pipe 2.

[0032] The distance between any two adjacent seepage holes 4 in the inner tube 1 is greater than the distance between any two adjacent seepage holes 4 in the middle tube 2.

[0033] This utility model includes a three-layer circular structure consisting of an inner tube 1, a middle tube 2, and an outer tube 3, with the tops of the three layers fitting together, leaving a certain space between the layers near the bottom.

[0034] Both inner tube 1 and middle tube 2 are seepage tubes.

[0035] Based on the characteristics of the sediment particle size distribution in the regional rainwater runoff, the perforation diameter is designed. The infiltration holes 4 of the inner layer pipe 1 have a larger diameter and a larger distance between the holes, which are used for the first stage of filtration.

[0036] The permeation holes 4 of the middle layer tube 2 have smaller diameters and smaller inter-hole distances, and are used for the second stage of filtration.

[0037] The outer layer has no holes.

[0038] like Figures 5 to 7As shown, after rainwater runoff enters this utility model, as the pipe travels along its path, large-diameter particles are intercepted by the smaller-diameter seepage holes 4 of the inner layer pipe 1 and will not enter the first gap, while medium-diameter and small-diameter particles can enter the first gap through the smaller-diameter seepage holes 4 of the inner layer pipe 1 (stage 1); similarly, medium-diameter particles are intercepted by the smaller-diameter seepage holes 4 of the middle layer pipe 2 and will not enter the second gap (stage 2), while small-diameter particles will enter the second gap along with the water through the smaller-diameter seepage holes 4 of the middle layer pipe 2 (stage 3).

[0039] like Figure 8 and Figure 9 As shown, in some embodiments, one downstream end of the inner tube 1, the middle tube 2, and the outer tube 3 are all connected to the inspection well 5;

[0040] Inside the inspection well 5, an arc-shaped mud trough 51 is provided at the water outlet position corresponding to the middle layer pipe 2;

[0041] One end of the arc-shaped mud trough 51 is attached to the water outlet end of the middle layer pipe 2, serving as an extension of the middle layer pipe 2 within the inspection well 5. The other end is equipped with a detachable weir plate 52, which blocks and collects sediment flowing with the water flow in the inner layer pipe 1 and the middle layer pipe 2.

[0042] In practical applications, large particles intercepted by the inner layer pipe 1 and medium particles intercepted by the middle layer pipe 2 will also be propelled downstream by the continuous flow of rainwater and enter the downstream inspection well 5. Since small particles passing through the smaller-diameter seepage holes 4 of the middle layer pipe 2 have less impact on the pipeline and are the most difficult to separate, they can be discharged downstream with the water.

[0043] Large and medium particles intercepted by the seepage holes 4 of the inner tube 1 and the middle tube 2 enter the inspection well 5 inside the middle tube 2, while small particles enter the inspection well with the water at the lower part.

[0044] To ensure safe drainage capacity, no obstacles or barriers are set up at the bottom of the water outlet of the outer pipe 3, where small particles and water flow through. However, at the top and middle, arc-shaped mud troughs 51 are set up for large and medium particles intercepted by the seepage holes 4 of the inner pipe 1 and the middle pipe 2. The arc-shaped mud troughs 51 are closely fitted with the middle pipe 2, serving as an extension of the middle pipe 2 in the inspection well 5. A detachable weir plate 52 is set in front of the arc-shaped mud troughs 51.

[0045] The detachable weir plate 52 can be used to block large and medium particles from entering the downstream and keep them in the sludge tank. On the other hand, its detachable design makes it convenient for maintenance personnel to clean it.

[0046] In some embodiments, the removable weir plate 52 is fixed to the inner wall of the inspection well 5 by a weir plate bracket 53.

[0047] In some embodiments, the cross-sections of the inner tube 1, the middle tube 2, and the outer tube 3 are all circular, triangular, or rectangular.

[0048] The preferred embodiments of this utility model have been described in detail above. It should be understood that those skilled in the art can make numerous modifications and variations based on the concept of this utility model without creative effort. Therefore, all technical solutions that can be obtained by those skilled in the art based on the concept of this utility model through logical analysis, reasoning, or limited experimentation on the basis of existing technology should be within the scope of protection defined by the claims.

Claims

1. A rainwater drainage pipe with multi-layer filtration capability; characterized in that, It includes an inner tube (1), a middle tube (2) and an outer tube (3) that are nested in sequence and whose diameters gradually increase. The length directions of the inner tube (1), the middle tube (2) and the outer tube (3) are all parallel to the horizontal direction, and their axes are located in the same vertical plane that is perpendicular to the horizontal plane. The upper tube walls are tightly attached to each other. The inner tube (1) and the middle tube (2) are both seepage tubes with several seepage holes (4) in the tube wall; The diameter of any of the seepage holes (4) in the inner tube (1) is larger than the diameter of any of the seepage holes (4) in the middle tube (2); The distance between any two adjacent seepage holes (4) in the inner tube (1) is greater than the distance between any two adjacent seepage holes (4) in the middle tube (2).

2. The rainwater drainage pipe with multi-layer filtration according to claim 1, characterized in that, The downstream end of the inner tube (1), the middle tube (2) and the outer tube (3) are all connected to the inspection well (5); Inside the inspection well (5), an arc-shaped mud trough (51) is provided corresponding to the water outlet position of the middle layer pipe (2). One end of the arc-shaped mud trough (51) is attached to the water outlet end of the middle layer pipe (2) as an extension of the middle layer pipe (2) in the inspection well (5), and the other end is provided with a detachable weir plate (52) to block and collect the sediment flowing with the water in the inner layer pipe (1) and the middle layer pipe (2).

3. A multi-layer filtration rainwater drainage pipe according to claim 2, characterized in that, The detachable weir plate (52) is fixed to the inner wall of the inspection well (5) by the weir plate bracket (53).

4. A multi-layer filtration rainwater drainage pipe according to claim 1, characterized in that, The cross-sections of the inner tube (1), the middle tube (2), and the outer tube (3) are all circular, triangular, or rectangular.

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