Road rainwater pretreatment device

Abstract

The utility model provides a road rainwater pretreatment device which is characterized by comprising a pretreatment chamber (1), a biological filtration chamber (2) and a drainage chamber (3), the pretreatment chamber (1) and the drainage chamber (3) are respectively arranged on the same side of the biological filtration chamber (2), the pretreatment chamber (1) is communicated with the biological filtration chamber (2), the biological filtration chamber (2) is communicated with the drainage chamber (3), and the biological filtration chamber (2) is communicated with the drainage chamber (3). An overflow weir (1-1) is also arranged between the pretreatment chamber (1) and the drainage chamber (3); through the arrangement of the pretreatment chamber and the biological filtration chamber, the pre-filtration chamber can effectively intercept large garbage and debris in rainwater, solid precipitates, the garbage and the debris are left in the pretreatment chamber, and a filling layer in the biological filtration chamber further filters organic matter and metal in the rainwater; therefore, the filtering treatment capacity of road rainwater is further improved, the filtering capacity and efficiency are improved, and the cleanliness of the filtered rainwater entering a rainwater pipe network is improved.

Description

Technical Field

[0001] The utility model relates to the technical field of road rainwater treatment, in particular to a road rainwater pretreatment device. Background Art

[0002] The inadequate anti-clogging measures in existing bioretention facilities for rainwater treatment seriously hinder the practical application and promotion of bioretention technology. Furthermore, the large footprint, insufficient rainwater treatment capacity, and inconvenient filter media replacement all exacerbate the clogging problem.

[0003] Therefore, there is an urgent need to provide a solution to solve the defects and shortcomings in the above-mentioned prior art. Summary of the Invention

[0004] In order to solve the defects and deficiencies in the prior art, the utility model provides a road rainwater pretreatment device.

[0005] The specific solutions provided by this utility model are:

[0006] A road rainwater pretreatment device is characterized by comprising a pretreatment chamber, a biological filtration chamber and a drainage chamber, wherein the pretreatment chamber and the drainage chamber are respectively arranged on the same side of the biological filtration chamber, and the pretreatment chamber is connected to the biological filtration chamber, and the biological filtration chamber is connected to the drainage chamber, and an overflow weir is also arranged between the pretreatment chamber and the drainage chamber.

[0007] As a further preferred embodiment of the present invention, a pre-filter box is fixedly installed inside the pretreatment chamber, and the pre-filter box includes a shell, the interior of the shell is filled with filter medium, a plurality of water inlets are opened on the periphery of the shell, and a connecting pipe connected to the interior of the biological filtration chamber is provided at the bottom of the shell.

[0008] As a further preferred embodiment of the present invention, a sealing cover is provided on the top of the pre-filter box.

[0009] As a further preferred embodiment of the present invention, the pre-filter box is configured as an upper and lower multi-layer modular structure.

[0010] As a further preferred embodiment of the present invention, the water inlets are evenly spaced at an outer edge of the shell of the pre-filter box.

[0011] As a further preferred embodiment of the present invention, a filling layer is provided inside the biological filtration chamber, and a water-permeable pipe is buried inside the filling layer. The top of the water-permeable pipe extends from the top of the filling layer, and the bottom of the water-permeable pipe extends into the bottom of the filling layer and is connected with the bottom drainage pipe. The bottom drainage pipe is connected with the interior of the drainage chamber, and a number of water-permeable holes are evenly opened on the outer wall of the water-permeable pipe.

[0012] As a further preferred embodiment of the present invention, a vent cap is fixedly provided on the top of the water-permeable pipe.

[0013] As a further preferred embodiment of the present invention, the filling layer includes a soil layer, a sand layer and a gravel layer arranged in sequence from top to bottom, green plants are planted on the top of the soil layer, and the bottom drainage pipe is buried inside the gravel layer.

[0014] As a further preferred embodiment of the present invention, a drainage pipe connected to the bottom drainage pipe and a rainwater pipe connected to the rainwater pipe network are provided inside the drainage chamber.

[0015] As a further preferred embodiment of the present invention, the road rainwater pretreatment device includes a water inlet connected to the pretreatment chamber, and a pretreatment chamber inspection port and a drainage chamber inspection port are respectively provided on the top of the pretreatment chamber and the drainage chamber.

[0016] Compared with the existing technology, the technical effects that can be achieved by this utility model include:

[0017] 1) The utility model provides a road rainwater pretreatment device. By providing a pretreatment chamber and a biological filtration chamber, the pretreatment chamber can effectively intercept larger garbage and debris in the rainwater, leaving solid sediment, garbage and debris in the pretreatment chamber. The filling layer inside the biological filtration chamber further filters the organic matter and metals in the rainwater, thereby further improving the filtration and treatment capacity of road rainwater, improving the filtration capacity and efficiency, and improving the cleanliness of the rainwater entering the rainwater pipe network after filtration.

[0018] 2) The utility model provides a road rainwater pretreatment device, which is provided with a pretreatment chamber inspection port and a drainage chamber inspection port. The pretreatment chamber can be entered through the pretreatment chamber inspection port, and the pre-filter box cover can be opened to replace the internal filter medium to prevent the biological filter chamber from being blocked. The drainage chamber can also be regularly inspected and maintained through the drainage chamber inspection port, and replacement and maintenance are convenient.

[0019] 3) The utility model provides a road rainwater pretreatment device which occupies a small area and has a strong rainwater treatment capacity. BRIEF DESCRIPTION OF THE DRAWINGS

[0020] Figure 1 It is a structural diagram of the present utility model.

[0021] Figure 2 It is a side view schematic diagram of the utility model.

[0022] Figure 3 It is a top view schematic diagram of the present invention.

[0023] Figure 4 This is a structural diagram of the pre-filter box of the utility model.

[0024] Figure 5 This is a side sectional view of the pre-filter box of the present utility model.

[0025] Figure 6 It is a side sectional view of the biological filtration chamber of the present invention.

[0026] Figure 7 This is a diagram of an actual application scenario of the present utility model. DETAILED DESCRIPTION

[0027] The following will be combined with the drawings in the embodiments of the present invention to clearly and completely describe the technical solutions in the embodiments of the present invention. Obviously, the embodiments described are only part of the embodiments of the present invention, not all of the embodiments. Based on the embodiments of the present invention, all other embodiments obtained by ordinary technicians in this field without making creative efforts are within the scope of protection of the present invention.

[0028] In the description of this utility model, it should be noted that the terms "upper," "lower," "inner," "outer," "front end," "rear end," "both ends," "one end," "the other end," and the like, indicating orientations or positional relationships, are based on the orientations or positional relationships shown in the accompanying drawings and are intended solely to facilitate the description of this utility model and simplify the description. They are not intended to indicate or imply that the devices or components referred to must have a specific orientation, be constructed, or operate in a specific orientation. Therefore, they should not be construed as limitations on this utility model. Furthermore, the terms "first" and "second" are used for descriptive purposes only and should not be construed as indicating or implying relative importance.

[0029] In the description of this utility model, it should be noted that, unless otherwise expressly specified or limited, the terms "installed," "provided with," "connected," etc. should be understood in a broad sense. For example, "connected" can mean a fixed connection, a detachable connection, or an integral connection; it can be a mechanical connection or an electrical connection; it can be a direct connection or an indirect connection through an intermediate medium, or it can be internal communication between two components. Those skilled in the art will be able to understand the specific meanings of the above terms in this utility model based on the specific circumstances.

[0030] [First embodiment]

[0031] like Figure 1-6 The figure shows a road rainwater pre-treatment device provided by the first embodiment of the present utility model, such as Figure 1As shown, it includes a pretreatment chamber 1, a biological filter chamber 2 and a drainage chamber 3. The pretreatment chamber 1 and the drainage chamber 3 are respectively arranged on the same side of the biological filter chamber 2, and the pretreatment chamber 1 is connected to the biological filter chamber 2, and the biological filter chamber 2 is connected to the drainage chamber 3. An overflow weir 1-1 is also provided between the pretreatment chamber 1 and the drainage chamber 3. Rainwater entering the device passes through the prefiltration chamber 1 to intercept larger garbage and debris in the rainwater, and after the solid sediment, garbage and debris are left in the pretreatment chamber 1, the organic matter and metals in the rainwater are further filtered through the biological filter chamber 2, thereby further improving the filtering and treatment capacity of road rainwater, improving the filtering capacity and efficiency, and improving the cleanliness of the rainwater entering the rainwater pipe network from the drainage chamber 3 after filtration; when it rains and the rainfall is heavy, the liquid level inside the pretreatment chamber 1 rises, and the excessive rainwater can cross the overflow weir 1-1 and directly enter the drainage chamber 3 and flow into the rainwater pipe network.

[0032] like Figure 2-5 As shown, in this embodiment, a pre-filter box a is fixedly provided inside the pretreatment chamber 1, and the pre-filter box a includes a shell a-2, and the interior of the shell a-2 is filled with a filter medium a-1, and the filter medium a-1 is used to intercept larger garbage and debris in the rainwater. A number of water inlets a-3 are opened on the periphery of the shell a-2, and rainwater entering the interior of the pretreatment chamber 1 can enter the interior of the shell a-2 through the water inlets a-3. The water inlets a-3 are evenly spaced at equal intervals on the outer edge of the shell a-2 of the pre-filter box a to ensure that the range of rainwater entering is comprehensive and the flow rate is uniform. A cover a-4 is provided on the top of the pre-filter box a to ensure that the position of the internal filter medium a-1 is fixed to avoid being washed away by excessive rainwater flow. A connecting pipe a-5 connected to the interior of the biological filter chamber 2 is provided at the bottom of the shell a-2, and the filtered rainwater can flow into the interior of the biological filter chamber 2 through the connecting pipe a-5.

[0033] As one of the preferred implementations, the pre-filter box a in this embodiment can be set as a multi-layer modular structure, which is convenient for setting the specific number of modules as needed according to the actual on-site environment, and also convenient for replacing modules at different positions of the pre-filter box a as needed in the later stage.

[0034] like Figure 6 As shown, the interior of the biological filtration chamber 2 in this embodiment is provided with a filling layer, which includes a soil layer 2-3, a sand layer 2-4 and a gravel layer 2-5 arranged in sequence from top to bottom. The multi-layer structure of the filling layer further filters the organic matter and metals in the rainwater, thereby further improving the filtering and treatment capacity of road rainwater, improving the filtering capacity and efficiency, and improving the cleanliness of the rainwater entering the rainwater pipe network after filtration. Green plants are planted on the top of the soil layer 2-3 to further reduce the rainwater scouring pressure, while improving the overall utilization rate of the device and reducing the occupied area.

[0035] A permeable pipe 2-2 is buried inside the filling layer, and the top of the permeable pipe 2-2 extends from the top of the filling layer. A vent cap 2-1 is fixedly provided on the top of the permeable pipe 2-2, and the permeable pipe 2-2 is connected to the atmosphere through the vent cap 2-1, thereby ensuring internal water permeability and stability. The bottom of the permeable pipe 2-2 extends into the bottom of the filling layer and is connected to the bottom drainage pipe 2-6. The bottom drainage pipe 2-6 is buried in the gravel layer 2-5 and is connected to the inside of the drainage chamber 3. A number of permeable holes are evenly opened on the outer wall of the permeable pipe 2-2. Rainwater filtered by the filling layer can enter the inside of the permeable pipe 2-2 through the permeable holes and then gather in the bottom drainage pipe 2-6 and finally flow into the drainage chamber 3.

[0036] like Figure 2-3 As shown, the interior of the drainage chamber 3 in this embodiment is provided with a drainage pipe 3-1 connected to the bottom drainage pipe 2-6 and a rainwater pipe 3-2 connected to the rainwater pipe network. Rainwater after passing through the pretreatment chamber 1 and the biological filtration chamber 2 can flow into the drainage chamber 3 through the drainage pipe 3-1, and then be discharged into the rainwater pipe network through the rainwater pipe 3-2.

[0037] The road rainwater pretreatment device includes a water inlet 4 connected to the pretreatment chamber 1. In order to further improve the convenience of inspection and replacement, a pretreatment chamber inspection port 5 and a drainage chamber inspection port 6 are respectively opened on the top of the pretreatment chamber 1 and the drainage chamber 3. The pretreatment chamber can be entered through the pretreatment chamber inspection port, and the pre-filter box cover can be opened to replace its internal filter medium to prevent blockage in the biological filter chamber. The drainage chamber can also be regularly inspected and maintained through the drainage chamber inspection port, which makes replacement and inspection convenient.

[0038] like Figure 7 The figure shows a practical application scenario of this embodiment. The device is set inside one side of a road. A water inlet 4 connected to the interior of the device is opened on the side of the road. A pretreatment chamber inspection port 5 and a drainage chamber inspection port 6 are opened on the top of the pretreatment chamber 1 and the drainage chamber 3 respectively. The specific working process of this embodiment is as follows:

[0039] During light rain, rainwater from the road enters the pretreatment chamber 1 through the water inlet 4, and is intercepted by the pre-filter box a for suspended solid sediment, garbage and debris in the rainwater, so that the suspended solid sediment, garbage and debris are retained in the pretreatment chamber 1; then, the rainwater filtered by the pre-filter box a passes through the connecting pipe a-5 biological filter chamber 2, and is filtered of organic matter and metals in the rainwater through multiple filling layers, and then enters the inside of the permeable pipe 2-2 through the permeable holes, and finally gathers in the bottom drainage pipe 2-6, flows into the drainage chamber 3 through the drainage pipe 3-1, and is then discharged into the rainwater pipe network through the rainwater pipe 3-2.

[0040] During heavy rain, the liquid level in the pretreatment chamber 1 continues to rise, and the excessive rainwater can directly flow over the overflow weir 1-1 into the drainage chamber 3 and into the rainwater pipe network through the rainwater pipe 3-2.

[0041] It will be apparent to those skilled in the art that the present invention is not limited to the details of the exemplary embodiments described above and that the present invention can be implemented in other specific forms without departing from the spirit or essential characteristics of the present invention. Therefore, the embodiments should be considered in all respects as illustrative and non-restrictive, and the scope of the present invention is defined by the appended claims, not the foregoing description, and all variations within the meaning and range of equivalents of the claims are intended to be encompassed within the present invention. Any reference sign in a claim should not be construed as limiting the claim to which it relates.

Claims

1. A road rainwater pretreatment device, characterized by: The invention comprises a pretreatment chamber (1), a biological filtration chamber (2) and a drainage chamber (3), wherein the pretreatment chamber (1) and the drainage chamber (3) are respectively arranged on the same side of the biological filtration chamber (2), and the pretreatment chamber (1) is communicated with the biological filtration chamber (2), and the biological filtration chamber (2) is communicated with the drainage chamber (3), and an overflow weir (1-1) is further arranged between the pretreatment chamber (1) and the drainage chamber (3).

2. A road rainwater pretreatment device according to claim 1, characterized in that: A pre-filter box (a) is fixedly arranged inside the pretreatment chamber (1), and the pre-filter box (a) comprises a shell (a-2), the interior of the shell (a-2) is filled with a filter medium (a-1), a plurality of water inlets (a-3) are opened on the periphery of the shell (a-2), and a connecting pipe (a-5) communicating with the interior of the biological filter chamber (2) is arranged at the bottom of the shell (a-2).

3. A road rainwater pretreatment device according to claim 2, characterized in that: The top of the pre-filter box (a) is provided with a cover (a-4).

4. A road rainwater pretreatment device according to claim 2, characterized in that: The pre-filter box (a) is configured as an upper and lower multi-layer modular structure.

5. A road rainwater pretreatment device according to claim 2, characterized in that: The water inlets (a-3) are evenly spaced at the outer edge of the shell (a-2) of the pre-filter box (a).

6. A road rainwater pretreatment device according to claim 1, characterized in that: A filling layer is provided inside the biological filtration chamber (2), and a water-permeable pipe (2-2) is buried inside the filling layer. The top of the water-permeable pipe (2-2) extends from the top of the filling layer, and the bottom of the water-permeable pipe (2-2) extends into the bottom of the filling layer and communicates with a bottom drainage pipe (2-6). The bottom drainage pipe (2-6) is communicated with the inside of the drainage chamber (3). The outer wall of the water-permeable pipe (2-2) is evenly provided with a plurality of water-permeable holes.

7. A road rainwater pretreatment device according to claim 6, characterized in that: A vent cap (2-1) is fixedly provided on the top of the water-permeable pipe (2-2).

8. The road rainwater pretreatment device according to claim 6, characterized in that: The filling layer comprises a soil layer (2-3), a sand layer (2-4) and a gravel layer (2-5) arranged in sequence from top to bottom, green plants are planted on the top of the soil layer (2-3), and the bottom drainage pipe (2-6) is buried inside the gravel layer (2-5).

9. A road rainwater pretreatment device according to claim 6, characterized in that: The drainage chamber (3) is provided with a drainage pipe (3-1) in communication with the bottom drainage pipe (2-6) and a rainwater pipe (3-2) in communication with the rainwater pipe network.

10. The road rainwater pretreatment device according to claim 1, characterized in that: The road rainwater pretreatment device comprises a water inlet (4) connected to the pretreatment chamber (1), and a pretreatment chamber inspection port (5) and a drainage chamber inspection port (6) are respectively provided on the tops of the pretreatment chamber (1) and the drainage chamber (3).

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