Road surface rainwater purification and recycling system

Abstract

The application provides a road table rainwater purification and recycling system, which comprises a road shoulder arranged between a road and a green belt, wherein the road shoulder is provided with a mounting groove along the driving direction of vehicles on the road; a rainwater collecting and irrigating device, which comprises a water collecting tank and a permeation pipe in communication with one end of the water collecting tank; the water collecting tank comprises a water inlet section, a sediment storage bin and a filter bin which are connected in sequence; the upper surface of the water collecting tank is not higher than the upper surface of the road shoulder; the lower surface of the water inlet section is not higher than the upper surface of the road; the permeation pipe is located below the filter bin; the permeation pipe is uniformly provided with water seepage openings; and the water inlet section is located in the mounting groove; and a back permeation layer is sleeved on the permeation pipe. The application has wider applicability without the need of installing additional pipes on the road; the water collecting tank structure can avoid blockage; a plurality of filter cores are arranged separately for easy replacement; and the sediment storage bin is arranged in a shape so that rainwater can be better introduced into the filter bin, thereby improving the utilization rate of rainwater.

Description

TECHNICAL FIELD

[0001] The present application relates to the technical field of rainwater purification, and in particular to a road surface rainwater purification and recycling system. BACKGROUND

[0002] With the advancement of urban development, road construction has become a driving force for development today, as it plays an important role in transportation and promoting consumption and economy for the people. However, road maintenance has a large expenditure in road construction, and rainwater erosion is one of the reasons for the aging of the road. In order to reduce the accumulation of rainwater on the road as much as possible, the middle of the road is usually high during road construction, and the two sides of the road are low, and a sewer is built at the low position to flow into the municipal water treatment pipe network for drainage. However, this reduces the utilization rate of rainwater.

[0003] Currently, in order to improve the above problems, a rainwater collection device is arranged on both sides of the road for rainwater recycling and reuse, but the existing rainwater collection device has too many pipes and is not suitable for ordinary roads and construction. At the same time, the water inlet is prone to blockage, and it is more troublesome to replace the filter element (such as patent number CN202022750395.0, a rainwater collection device).

[0004] Therefore, it is necessary to develop a road surface rainwater purification and recycling system without directly installing pipes on the road, which has wider applicability. The setting of the water collecting tank structure can avoid blockage, and the separate setting of multiple filter elements facilitates replacement. The setting of the mud settling bin shape allows rainwater to be better introduced into the filter bin, improving the utilization rate of rainwater. SUMMARY

[0005] The present application aims to solve one of the technical problems in the prior art or related art.

[0006] Therefore, the present application provides a road surface rainwater purification and recycling system, which comprises:

[0007] A road shoulder is arranged between the road and the green belt, and the road shoulder is provided with a mounting groove along the vehicle driving direction of the road;

[0008] A rainwater collection and irrigation device comprises a water collecting tank and a permeation pipe in communication with one end of the water collecting tank, the water collecting tank comprises an inlet section, a mud settling bin and a filter bin connected in sequence, the upper surface of the water collecting tank is not higher than the upper surface of the road shoulder, the lower surface of the inlet section is not higher than the upper surface of the road, the permeation pipe is located below the filter bin, the permeation pipe is uniformly provided with water infiltration openings, and the inlet section is located in the mounting groove;

[0009] A return seepage layer is sleeved on the permeation pipe.

[0010] Further, the filter bin is provided with a first filter core and a second filter core side by side, the first filter core is arranged close to the sediment bin, the first filter core is a mixture of gravel, ceramsite and recycled aggregate, and the second filter core is an activated carbon filter core.

[0011] Further, the rainwater collection irrigation device further comprises:

[0012] A partition wall is arranged between the sediment bin and the first filter core and between the first filter core and the second filter core, respectively, the height of the first filter core, the second filter core and the partition wall is less than the height of the filter bin, and the partition wall is uniformly provided with water permeable holes, and the diameter of the water permeable holes is 10mm to 15mm.

[0013] The partition wall comprises a wall plate and a wall corner arranged at the bottom of the wall plate, and the wall corner is in the shape of an isosceles triangle along the cross section of the symmetric surface of the rainwater collection irrigation device.

[0014] Further, the rainwater collection irrigation device further comprises:

[0015] A blind pipe is arranged, one end of the blind pipe is communicated with the permeation pipe, the other end of the blind pipe is communicated with a municipal water treatment pipe network, the distance between the blind pipe and the road surface is 50cm to 70cm, the blind pipe is provided with water permeable holes, and the water permeable holes are located at the upper 2 / 3 of the side of the blind pipe facing the water collecting tank.

[0016] Further, the diameter of the blind pipe is 10cm to 15cm, and the diameter of the water permeable holes is 4mm to 6mm.

[0017] Further, the back permeation layer comprises a gravel layer and a water permeable geotextile, and the gravel layer is arranged close to the permeation pipe.

[0018] Further, the specification of the water permeable geotextile is 200g / m 2 to 300g / m 2 .

[0019] Further, the diameter of the permeation pipe is 20cm to 30cm, the diameter of the water permeable hole is 4mm to 6mm, and the height of the permeation pipe is 80cm to 120cm.

[0020] Further, the material of the permeation pipe is HDPE material.

[0021] Further, the distance between two adjacent rainwater collection irrigation devices is 15m to 20m.

[0022] The technical scheme provided by the application can include the following beneficial effects:

[0023] No additional pipes need to be installed on the road, making it more widely applicable; the water collection tank structure can prevent clogging, and the multiple filter cartridges are set separately for easy replacement; and the sedimentation chamber shape allows rainwater to be better introduced into the filter chamber, improving the utilization rate of rainwater.

[0024] It should be understood that the above general description and the following detailed description are exemplary and explanatory only, and are not intended to limit the invention. Attached Figure Description

[0025] The accompanying drawings, which are incorporated in and form part of this specification, illustrate embodiments consistent with the invention and, together with the description, serve to explain the principles of the invention.

[0026] To more clearly illustrate the technical solutions in the embodiments of the present invention or the prior art, the drawings used in the description of the embodiments or the prior art will be briefly introduced below. Obviously, for those skilled in the art, other drawings can be obtained based on these drawings without creative effort.

[0027] Figure 1 A schematic diagram of a road surface rainwater purification and reuse system according to the present invention is shown;

[0028] Figure 2 A schematic diagram of a rainwater harvesting irrigation device according to the present invention is shown.

[0029] in, Figure 1 and Figure 2 The correspondence between the reference numerals and component names in the attached drawings is as follows:

[0030] 1. Water collection tank, 101. Inlet section, 102. Sedimentation chamber, 1021. Right-angled trapezoidal frame section, 1022. Rectangular frame section, 103. Filter chamber, 1031. First filter element, 1032. Second filter element, 1033. Partition wall, 2. Infiltration pipe, 201. Infiltration outlet, 3. Blind pipe, 301. Infiltration hole, 4. Highway, 5. Green belt, 6. Shoulder, 601. Installation trench, 7. Backflow layer, 701. Crushed stone layer, 702. Permeable geotextile. Detailed Implementation

[0031] Exemplary embodiments will now be described in detail, examples of which are illustrated in the accompanying drawings. When the following description relates to the drawings, unless otherwise indicated, the same numerals in different drawings denote the same or similar elements. The embodiments described in the following exemplary embodiments do not represent all embodiments consistent with the present invention. Rather, they are merely examples of apparatuses and methods consistent with some aspects of the invention as detailed in the appended claims.

[0032] Example 1

[0033] Figure 1 A schematic diagram of a road surface rainwater purification and recycling system according to the present application is shown.

[0034] As Figure 1 shown, the present embodiment provides a road surface rainwater purification and recycling system, which comprises:

[0035] A road shoulder 6 is arranged between the highway 4 and the green belt 5, and the road shoulder 6 is provided with a mounting groove 601 along the vehicle driving direction of the highway 4;

[0036] The rainwater collection and irrigation device comprises a water collecting tank 1 and a permeation pipe 2 in communication with one end of the water collecting tank 1, and the water collecting tank 1 comprises a water inlet section 101, a sediment storage bin 102 and a filter bin 103 connected in sequence, the upper surface of the water collecting tank 1 is not higher than the upper surface of the road shoulder 6, the lower surface of the water inlet section 101 is not higher than the upper surface of the highway 4, the permeation pipe 2 is located below the filter bin 103, and the permeation pipe 2 is uniformly provided with water seepage openings 201, and the water inlet section 101 is located in the mounting groove 601;

[0037] A back permeation layer 7 is sleeved on the permeation pipe 2.

[0038] The distance between adjacent two rainwater collection and irrigation devices is 15-20 m.

[0039] No additional pipeline needs to be installed on the road, and the applicability is wider; the structure of the water collecting tank 1 can avoid blockage, and the separate arrangement of multiple filter cores facilitates replacement; and the shape of the sediment storage bin 102 enables the rainwater to be better introduced into the filter bin 103, thereby improving the utilization rate of the rainwater.

[0040] Specifically, the structure of the system is as follows: comprising a highway 4, a green belt 5 and a road shoulder 6, wherein the highway 4 can be an asphalt road or a cement road, and the asphalt road is generally used in urban construction, the green belt 5 is arranged on both sides of the highway 4, the road shoulder 6 is arranged between the highway 4 and the green belt 5, the mounting groove 601 is formed on the road shoulder 6, the water inlet section 101 is located in the mounting groove 601, and the permeation pipe 2 is inserted into the soil of the green belt 5; due to the construction feature that the middle of the highway 4 is high and the two sides are low, the accumulated water of the highway 4 enters the sediment storage bin 102 and the filter bin 103 in sequence through the water inlet section 101, the rainwater is filtered by the filter bin 103 and then flows into the permeation pipe 2, and the permeation pipe 2 permeates the filtered rainwater into the green belt 5 to recycle the rainwater, wherein the outer side of the permeation pipe 2 is wrapped by the back permeation layer 7, when the soil of the green belt 5 has too much water, the back permeation layer 7 can prevent the rainwater from back permeating into the rainwater collection and irrigation device, only a small part of the back permeation can be filtered by the back permeation layer 7 to become relatively clean, and the back permeation will not affect the service life of the rainwater collection and irrigation device.

[0041] The water inlet section 101 comprises upper and lower plates arranged in parallel and a pair of side plates for connecting the upper and lower plates; the sludge storage bin 102 comprises a rectangular frame section 1022 and a right-angled trapezoidal frame section 1021 connected in sequence, the rectangular frame section 1022 is communicated with the large end of the right-angled trapezoidal frame section 1021, and the small end of the right-angled trapezoidal frame section 1021 is communicated with the water inlet section 101; the filter bin 103 is communicated with one end of the rectangular frame section 1022 away from the right-angled trapezoidal frame section 1021, the height of the filter bin 103 is consistent with the height of the rectangular frame section 1022, and the first filter core 1031 and the second filter core 1032 are arranged side by side in the filter bin 103, and the first filter core 1031 is arranged close to the sludge storage bin 102.

[0042] The upper surfaces of the water inlet section 101, the sludge storage bin 102 and the filter bin 103 are flush with the soil on the green belts on both sides of the road, the water inlet section 101 is located between the road shoulders, and the lower plate is not higher than the road surface, due to the setting that the middle of the road is high and the two ends are low, rainwater naturally flows into the sludge storage bin 102 of the rainwater collection and irrigation device from the water inlet section 101 after raining, and some relatively heavy stones and soil are deposited, the rainwater carrying pollutants on the road (deicing agent, industrial salt, motor vehicle oil and gasoline, and tire rubber caused by tire wear due to vehicle braking, etc.) passes through the first filter core 1031 and the second filter core 1032 in sequence, the first filter core 1031 performs preliminary purification on the rainwater, and the second filter core 1032 performs fine purification on the rainwater, and finally the rainwater flows into the deep soil of the green belt through the infiltration pipe 2 for irrigation, and when the deep rainwater reaches a nearly saturated state, the rainwater also irrigates other soil layers through the water infiltration openings 201 on the infiltration pipe 2.

[0043] It should be noted that the sludge storage bin 102 comprises the rectangular frame section 1022 and the right-angled trapezoidal frame section 1021 connected in sequence, the rectangular frame section 1022 is communicated with the large end of the right-angled trapezoidal frame section 1021, and the small end of the right-angled trapezoidal frame section 1021 is communicated with the water inlet section 101, and such a setting makes there be an inclined position from the water inlet section 101 to the sludge storage bin 102, which is more conducive to the introduction of rainwater, and the preliminary deposition of stones and soil can be achieved by arranging the sludge storage bin 102 between the filter bin and the water inlet section 101, thereby prolonging the service life of the filter core in the filter bin 102.

[0044] It should be noted that a plurality of rainwater collection and irrigation devices are arranged on the road shoulder 6, and the distance between adjacent two rainwater collection and irrigation devices is adjusted and set according to historical big data of accumulated water.

[0045] Further, the back infiltration layer 7 comprises a gravel layer 701 and a water-permeable geotextile 702, and the gravel layer 701 is arranged close to the infiltration pipe 2.

[0046] The specification of the water permeable geotextile 702 is 200g / m 2 to 300g / m 2 .

[0047] It should be noted that the permeable pipe 2 is wrapped with a layer of gravel layer 701 to prevent the soil from seeping back into the permeable pipe 2. A layer of water permeable geotextile 702 is provided outside the gravel layer 701 to prevent large particles of soil from blocking the gravel layer 701 and the permeable pipe 2 during the reverse osmosis process.

[0048] Further, the diameter of the permeable pipe 2 is 20cm to 30cm, the diameter of the water outlet 201 is 4mm to 6mm, and the height of the permeable pipe 2 is 80cm to 120cm.

[0049] It should be noted that the diameter of the permeable pipe 2 in this embodiment is 25cm, the diameter of the water outlet 201 is 5mm, and the height of the permeable pipe 2 is 100cm. Such a setting can meet the collection effect of most rainfall. The size of the permeable pipe 2 can be selected according to the historical rainfall data of the section of the road 4.

[0050] Further, the material of the permeable pipe 2 is HDPE material.

[0051] It should be noted that HDPE is high-density polyethylene. The pipe made of this material has excellent scratch resistance and environmental stress cracking resistance, and can safely work in a temperature range of -60℃ to 60℃. It also has good chemical corrosion resistance, which can prolong the service life of the permeable pipe 2.

[0052] It should be further noted that the permeable pipe 2 is detachably installed at the bottom of the water collecting tank 1, and the water inlet section 101, the sediment storage bin 102 and the filter bin 103 are integrally formed,

[0053] The working principle of the purification and recycling system is as follows: the rainwater on the road 4 flows into the sediment storage bin 102 and the filter bin 103 in sequence through the water inlet section 101, and the filtered rainwater flows out from the permeable pipe 2. Since the permeable pipe 2 is provided with water outlets 201 from top to bottom, the rainwater slowly irrigates different height layers in the soil of the green belt 5. When the rainwater flows out of the permeable pipe 2, it passes through the reverse osmosis layer 7, which serves two purposes: one is to further filter the irrigation rainwater, and the other is to prevent rainwater from reverse osmosis. After the rainwater passes through the reverse osmosis layer 7, it infiltrates the soil. After the rainwater collection and irrigation device is installed, the bionic grass is laid on it, which can better integrate with the green belt 5 and avoid exposing the rainwater collection and irrigation device to the outside, affecting the aesthetic appearance.

[0054] Example 2

[0055] Figure 2A schematic view of the rainwater collection irrigation device according to the present application is shown.

[0056] As Figure 2 shown, on the basis of Embodiment 1, the filter bin 103 is provided with a first filter core 1031 and a second filter core 1032 side by side, the first filter core 1031 is arranged close to the sludge bin 102, the first filter core 1031 is a mixture of gravel, ceramsite and recycled aggregate, and the second filter core 1032 is an activated carbon filter core.

[0057] The gravel in the first filter core 1031 can preliminarily filter large-particle impurities in the rainwater, prevent rainwater from backwashing, and adsorb and decompose nitrogen and phosphorus in the rainwater, thereby preliminarily purifying the rainwater.

[0058] It should be noted that the activated carbon filter core of the second filter core 1032 can further adsorb fine-particle impurities such as silt, rust, suspended matter and microfibers in the rainwater, so that the rainwater is finally purified and meets the requirements of irrigated soil.

[0059] Further, the rainwater collection irrigation device further comprises:

[0060] A partition wall 1033 is arranged between the sludge bin 102 and the first filter core 1031 and between the first filter core 1031 and the second filter core 1032, respectively, the height of the first filter core 1031, the second filter core 1032 and the partition wall 1033 is less than the height of the filter bin 103, and the partition wall 1033 is uniformly provided with water-permeable holes, the diameter of the water-permeable holes is 10mm to 15mm;

[0061] The partition wall 1033 comprises a wall plate and a wall corner arranged at the bottom of the wall plate, and the wall corner along the cross section of the symmetric surface of the rainwater collection irrigation device is in the shape of an isosceles triangle.

[0062] It should be noted that in this embodiment, the height of the partition wall 1033, the first filter core 1031 and the second filter core 1032 is half of the height of the filter bin 103, which is arranged to ensure the rainwater collection efficiency of the device when encountering heavy rain, so that when the rainfall is too large, the rainwater is directly accommodated in the entire space above the partition wall 1033, and the rainwater directly flows into the permeation pipe 2 through the second filter core 1032 to irrigate the soil. Since the rainwater carried by heavy rain (precipitation reaching 15 mm or more) is cleaner, the rainwater irrigation level requirement can be ensured without passing through the first filter core 1031. In this embodiment, the diameter of the water permeable hole is 10 mm.

[0063] The partition wall 1033 is arranged in the structure of a wallboard and a wall corner, and the wall corner is in the shape of an isosceles triangle, which can ensure the stability of the partition wall 1033 and avoid the impact of heavy rain on the partition wall, thereby affecting the service life of the partition wall 1033.

[0064] Further, the rainwater collection and irrigation device further comprises:

[0065] The blind pipe 3 is in communication with the permeation pipe 2 at one end and in communication with the municipal water treatment pipe network at the other end, and the distance between the blind pipe 3 and the surface of the road 4 is 50-70 cm. The water permeable hole 301 is arranged on the blind pipe 3 and is located at the upper 2 / 3 of the side of the blind pipe 3 facing the water collecting tank 1.

[0066] The diameter of the blind pipe 3 is 10-15 cm, and the diameter of the water permeable hole 301 is 4-6 mm.

[0067] It should be noted that in order to prevent some heavy rain conditions, the permeation pipe 2 can also be in communication with the municipal water treatment pipe network through the blind pipe 3, which can avoid damage caused by excessive rainwater in the rainwater collection and irrigation device and also avoid excessive irrigation of the soil.

[0068] The arrangement of the water permeable hole 301 on the blind pipe 3 can ensure that the soil between the rainwater collection and irrigation device and the municipal water treatment pipe network can also be appropriately irrigated.

[0069] Other embodiments of the application will be apparent to those skilled in the art from consideration of the specification and practice of the application disclosed herein. It is intended that the specification and examples be considered as exemplary only, with the true scope and spirit of the application being indicated by the following claims.

[0070] It should be understood that the application is not limited to the precise construction which has been described above and which shown in the drawings, and that various modifications and changes can be made by those skilled in the art without departing from the scope of the application. The scope of the application should be limited only by the appended claims.

Claims

1. A system for purifying and reusing rainwater from road surfaces, characterized in that, The purification and reuse system includes: A road shoulder is provided between the highway and the green belt, and the road shoulder is provided with an installation groove along the vehicle travel direction of the highway; A rainwater harvesting and irrigation device includes a water collection tank and an infiltration pipe connected to one end of the water collection tank. The water collection tank includes an inlet section, a sedimentation chamber, and a filtration chamber connected in sequence. The upper surface of the water collection tank is not higher than the upper surface of the road shoulder, the lower surface of the inlet section is not higher than the upper surface of the road, the infiltration pipe is located below the filtration chamber, and infiltration ports are evenly provided on the infiltration pipe. The inlet section is located in the installation groove. The backflow layer is fitted over the permeation tube; The filter chamber is provided with a first filter element and a second filter element arranged in parallel. The first filter element is located close to the sedimentation chamber. The first filter element is a mixture of crushed stone, ceramsite and recycled aggregate. The second filter element is an activated carbon filter element. The rainwater harvesting and irrigation device also includes: A partition wall is respectively set between the sedimentation chamber and the first filter element and between the first filter element and the second filter element. The height of the first filter element, the second filter element and the partition wall is less than the height of the filter chamber. The partition wall is uniformly provided with water permeable holes, and the diameter of the water permeable holes is 10mm to 15mm. The partition wall includes a wall panel and a corner wall disposed at the bottom of the wall panel. The corner wall is an isosceles triangle in cross section along the symmetry plane of the rainwater collection and irrigation device. The infiltration layer includes a gravel layer and a permeable geotextile, with the gravel layer positioned close to the infiltration pipe; The diameter of the permeation tube is 20cm to 30cm, the diameter of the seepage outlet is 4mm to 6mm, and the height of the permeation tube is 80cm to 120cm.

2. The road surface rainwater purification and reuse system according to claim 1, characterized in that, The rainwater harvesting and irrigation device also includes: A blind pipe, one end of which is connected to the infiltration pipe and the other end of which is connected to the municipal water treatment network, is 50cm to 70cm away from the road surface. The blind pipe is provided with a seepage hole, which is located at the upper 2 / 3 of the side of the blind pipe facing the water collection tank.

3. The road surface rainwater purification and reuse system according to claim 2, characterized in that, The diameter of the blind pipe is 10cm to 15cm, and the diameter of the seepage hole is 4mm to 6mm.

4. The road surface rainwater purification and reuse system according to claim 1, characterized in that, The permeable geotextile has a specification of 200g / m². 2 Up to 300g / m 2 .

5. The system for purifying and reusing road surface rainwater according to any one of claims 1 to 4, characterized in that, The permeation tube is made of HDPE material.

6. The road surface rainwater purification and reuse system according to any one of claims 1 to 4, characterized in that, The distance between two adjacent rainwater harvesting and irrigation devices is 15m to 20m.

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