Rainwater outlet purification device suitable for hard upright revetment and purification method of rainwater outlet purification device

Abstract

The invention discloses a rainwater discharge port purification device suitable for a hard upright revetment and a purification method thereof.The device comprises a discharge port vertical shaft, a precipitation vertical shaft, an inner cabin, an outer cabin, a water passing channel, a filter material and a grating, and the discharge port vertical shaft is arranged at a water discharge port and used for collecting rainwater from the water discharge port; the discharge port vertical shaft is communicated with the precipitation vertical shaft through a water passing channel, the water passing channel penetrates through the bottom of the inner cabin, a grating is arranged in the water passing channel, the water passing channel can be communicated with the inner cabin through the grating, the top of the inner cabin is communicated with the outer cabin through a communication window, and the precipitation vertical shaft is further communicated with the outer cabin through a water seepage window. The inner cabin is adjacent to the outer cabin, the top of the outer cabin is lower than that of the inner cabin, the outer cabin is provided with a water outlet, and the inner cabin and the outer cabin are filled with filter materials respectively. The device is simple to operate, low in cost and small in occupied area, and has filtering, purifying and draining functions.

Description

Technical Field

[0001] The present application relates to the technical field of water treatment and water pollution prevention and control, and in particular to a rainwater outlet purification device suitable for a hard upright revetment and a purification method thereof. Background Art

[0002] Stormwater runoff sewage refers to the sewage collected after washing the ground, garbage, etc. during rainfall. The main pollutants include sediment, suspended organic matter, dissolved organic matter, plant nutrients, etc. At present, many river and lake revetments use hard vertical revetments, mainly considering the flood control and drainage function and simple construction. However, hard vertical revetments destroy the living conditions of revetment vegetation, prevent the water quality circulation between rivers and lakes and shore plants, and weaken the self-purification ability of rivers and lakes. At the same time, the rainwater runoff from the revetment is directly discharged into rivers and lakes through the rainwater outlet. The concentration of pollutants in the rainwater runoff is high, which can easily cause the water quality of rivers and lakes to deteriorate.

[0003] The ecological transformation of rainwater outlets is one of the important measures to reduce the amount of rainwater discharged into lakes and rivers. Flexible ecological enclosures + ecological floating beds, small artificial wetlands, ecological gabion walls, etc. are often used. However, flexible ecological enclosures and ecological floating beds are easily damaged by the impact of water flow. Ecological gabion walls need to occupy a large area of ​​water to achieve the purification effect. Although small artificial wetlands have a higher purification effect, they also occupy a large area and are easily blocked after long-term operation. They are difficult to clean and the filtering and purification effect is reduced. Summary of the invention

[0004] Based on this, it is necessary to provide a rainwater outlet purification device suitable for hard vertical revetments. The rainwater outlet purification device suitable for hard vertical revetments of the present invention is simple to operate, low in cost, and occupies a small area, and takes into account filtering, purification and drainage functions.

[0005] An embodiment of the present application provides a rainwater outlet purification device suitable for a hard upright revetment.

[0006] A rainwater outlet purification device suitable for a hard upright revetment comprises an outlet shaft, a sedimentation shaft, an inner cabin, an outer cabin, a water passage, a filter material and a grille, wherein the outlet shaft is arranged at a drain outlet for collecting rainwater from the drain outlet, the outlet shaft is communicated with the sedimentation shaft through the water passage, the water passage is penetrated through the bottom of the inner cabin, the grille is arranged in the water passage, the water passage can be communicated with the inner cabin through the grille, the top of the inner cabin is communicated with the outer cabin through a connecting window, the sedimentation shaft is also communicated with the outer cabin through a water seepage window, the inner cabin and the outer cabin are arranged adjacent to each other, the top of the outer cabin is lower than the top of the inner cabin, the outer cabin is provided with a water outlet, and the inner cabin and the outer cabin are respectively filled with filter material.

[0007] In some embodiments, there are multiple sedimentation shafts, at least one of which is disposed on both sides of the outlet shaft, each of which is connected to the outlet shaft through the water passage, and an inner chamber is disposed above each of the water passages.

[0008] In some embodiments, the water passage is connected to the bottom of the discharge shaft, and the water passage is inclined, and gradually descends from the discharge shaft to the sedimentation shaft.

[0009] In some of the embodiments, the top height of the sedimentation shaft is lower than the top height of the inner chamber and higher than the top height of the outer chamber.

[0010] In some embodiments, the filter material filled in the inner cabin includes a first layer, a second layer and a third layer distributed from bottom to top, wherein the filter material particle size of the first layer, the filter material particle size of the second layer and the filter material particle size of the third layer decreases sequentially.

[0011] In some of the embodiments, the particle size of the filter material filled in the outer chamber is the same as the particle size of the filter material of the third layer filled in the inner chamber.

[0012] In some embodiments, the number of the connected windows is multiple;

[0013] and / or, the height of the communication window is flush with the top of the outer cabin;

[0014] and / or, the water seepage window is close to the bottom of the outer compartment;

[0015] And / or, the water outlet is provided at the bottom of the outer compartment.

[0016] In some of the embodiments, the rainwater outlet purification device suitable for hard upright revetments also includes landscape flowers and plants, and the landscape flowers and plants are planted on the top of the outer cabin.

[0017] In some of the embodiments, the rainwater outlet purification device suitable for hard vertical revetments also includes a safety fence installed on the top of the inner cabin.

[0018] An embodiment of the present application also provides a rainwater outlet purification method applicable to a hard vertical revetment.

[0019] A method for purifying a rainwater outlet suitable for a hard vertical revetment adopts the above-mentioned rainwater outlet purification device suitable for a hard vertical revetment, comprising the following steps:

[0020] After the rainwater enters the drainage shaft through the drainage outlet, it enters the sedimentation shaft through the water passage, and the water level in the sedimentation shaft gradually rises;

[0021] Rainwater enters the inner cabin through the grille in the water passage, and is filtered by the filter material in the inner cabin. A small amount of mixed sediment and suspended matter is retained in the inner cabin by the filter material, and at the same time, organic matter dissolved in water is adsorbed by the filter material and decomposed by microorganisms on the surface of the filter material.

[0022] After the rainwater overflows the filter material in the inner cabin, it enters the outer cabin through the connecting window, and then flows out from the water outlet of the outer cabin after being adsorbed and purified by the filter material in the outer cabin again;

[0023] When rainwater stops entering the drainage shaft, the rainwater in the sedimentation shaft infiltrates into the outer chamber through the seepage window, and the water level of the sedimentation shaft gradually drops, carrying with it part of the silt and suspended matter trapped in the filter material in the inner chamber and flowing into the sedimentation shaft.

[0024] The above-mentioned rainwater outlet purification device suitable for hard upright revetments is simple to operate, low in cost, and occupies a small area. It can also be used as a part of the hard revetment without occupying the water area, and can also protrude a part of the revetment. It can efficiently deposit silt and suspended matter in the vertical shafts on both sides, and regularly clean them with suction trucks, taking into account the filtering, purification and drainage functions. At the same time, it also reduces the erosion of the river and lake bottom sediments by water flow and reduces the release of nutrients in the bottom sediments by dispersing the drainage outlets. BRIEF DESCRIPTION OF THE DRAWINGS

[0025] In order to more clearly illustrate the technical solutions in the embodiments of the present application, the following briefly introduces the drawings required for use in the description of the embodiments. Obviously, the drawings described below are only some embodiments of the present application, and those skilled in the art can obtain other drawings based on these drawings without creative work.

[0026] In order to more completely understand the present application and its beneficial effects, the following description will be given in conjunction with the accompanying drawings. In the following description, the same reference numerals represent the same parts.

[0027] FIG1 is a schematic diagram of a rainwater outlet purification device applicable to a hard vertical revetment according to an embodiment of the present invention;

[0028] FIG2 is a schematic diagram of a rainwater outlet purification device applicable to a hard vertical revetment according to an embodiment of the present invention;

[0029] 3 is a schematic cross-sectional view of a rainwater outlet purification device suitable for a rigid vertical revetment according to an embodiment of the present invention, taken from the vertical shafts on both sides toward the middle vertical shaft;

[0030] FIG4 is a schematic diagram of the vertical shafts and compartment walls on both sides of a rainwater outlet purification device suitable for a hard vertical revetment according to an embodiment of the present invention;

[0031] 5 is a schematic cross-sectional view of a rainwater outlet purification device suitable for a hard upright revetment according to an embodiment of the present invention, taken from the position of a window in a middle partition wall.

[0032] Description of Reference Numerals

[0033] 10. Rainwater outlet purification device suitable for hard vertical revetment; 100. Outlet shaft; 200. Sedimentation shaft; 300. Inner cabin; 400. Outer cabin; 500. Water passage; 600. Filter material; 610. First layer; 620. Second layer; 630. Third layer; 700. Grille; 800. Landscape flowers and plants; 900. Safety fence; 1000. Cover plate; 101. Connecting window; 102. Seepage window; 103. Water outlet. DETAILED DESCRIPTION

[0034] In order to make the above-mentioned objects, features and advantages of the present invention more obvious and easy to understand, the specific embodiments of the present invention are described in detail below in conjunction with the accompanying drawings. In the following description, many specific details are set forth to facilitate a full understanding of the present invention. However, the present invention can be implemented in many other ways different from those described herein, and those skilled in the art can make similar improvements without violating the connotation of the present invention, so the present invention is not limited by the specific embodiments disclosed below.

[0035] In the description of the present invention, it should be understood that the terms "center", "longitudinal", "lateral", "length", "width", "thickness", "up", "down", "front", "back", "left", "right", "vertical", "horizontal", "top", "bottom", "inside", "outside", "clockwise", "counterclockwise", "axial", "radial", "circumferential" and the like indicate orientations or positional relationships based on the orientations or positional relationships shown in the accompanying drawings, and are only for the convenience of describing the present invention and simplifying the description, and do not indicate or imply that the referred device or element must have a specific orientation, be constructed and operated in a specific orientation, and therefore should not be understood as limiting the present invention.

[0036] In the present invention, unless otherwise clearly specified and limited, the terms "installed", "connected", "connected", "fixed" and the like should be understood in a broad sense, for example, it can be 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, it can be the internal connection of two elements or the interaction relationship between two elements, unless otherwise clearly defined. For ordinary technicians in this field, the specific meanings of the above terms in the present invention can be understood according to specific circumstances.

[0037] In the present invention, unless otherwise clearly specified and limited, a first feature being "above" or "below" a second feature may mean that the first and second features are in direct contact, or the first and second features are in indirect contact through an intermediate medium. Moreover, a first feature being "above", "above" or "above" a second feature may mean that the first feature is directly above or obliquely above the second feature, or simply means that the first feature is higher in level than the second feature. A first feature being "below", "below" or "below" a second feature may mean that the first feature is directly below or obliquely below the second feature, or simply means that the first feature is lower in level than the second feature.

[0038] In the description of the present invention, "several" means more than one, "many" means more than two, "greater than", "less than", "exceed", etc. are understood to exclude the number itself, and "above", "below", "within", etc. are understood to include the number itself. If there is a description of "first" or "second", it is only used for the purpose of distinguishing the technical features, and cannot be understood as indicating or implying the relative importance or implicitly indicating the number of the indicated technical features or implicitly indicating the order of the indicated technical features.

[0039] In this article, "optionally", "optional", "optional" means optional, that is, it means to be selected from any of the two parallel solutions of "yes" or "no". If there are multiple "optional" in a technical solution, unless otherwise specified and there is no contradiction or mutual restriction, each "optional" is independent. In this application, the descriptions such as "optionally contain" and "optionally include" mean "contain or not contain".

[0040] In the present application, when it comes to a numerical interval (i.e., a numerical range), unless otherwise specified, the distribution of the optional numerical values ​​in the numerical interval is considered to be continuous, and includes the two numerical endpoints (i.e., the minimum and maximum values) of the numerical interval, and each numerical value between the two numerical endpoints. Unless otherwise specified, when the numerical interval only refers to an integer in the numerical interval, it includes the two endpoint integers of the numerical range, and each integer between the two endpoints, which is equivalent to directly listing each integer. When multiple numerical ranges are provided to describe features or characteristics, these numerical ranges can be combined. In other words, unless otherwise specified, the numerical range disclosed in the present application should be understood to include any and all sub-ranges included therein. The "numerical value" in the numerical interval can be any quantitative value, such as a number, a percentage, a ratio, etc. "Numerical interval" allows for a broad range of quantitative intervals such as percentage intervals, ratio intervals, and ratio intervals.

[0041] Unless otherwise defined, all technical and scientific terms used herein have the same meaning as those commonly understood by those skilled in the art to which the present invention belongs. The terms used herein in the specification of the present invention are only for the purpose of describing specific embodiments and are not intended to limit the present invention. The term "and / or" used herein includes any and all combinations of one or more of the related listed items.

[0042] The embodiment of the present application provides a rainwater outlet purification device 10 suitable for hard upright revetments to solve at least one of the following problems existing in the prior art: (1) The runoff rainwater is mixed with a lot of sediment, which is very easy to block the gaps in the filler of the small artificial wetland, reducing the filtering and purification effect. (2) After the blockage is cleared, the filler needs to be removed again, and the sediment stains need to be cleaned and refilled, which is complicated to operate and has high costs. (3) Artificial wetlands generally occupy a relatively large area. Hard revetments are generally common in embankments along rivers and lakes or river embankments in urban areas that are in need of flood control. There is not much space for artificial wetland construction. The following will describe the rainwater outlet purification device 10 suitable for hard upright revetments in conjunction with the accompanying drawings.

[0043] The rainwater outlet purification device 10 applicable to a rigid upright revetment provided in an embodiment of the present application is exemplarily shown in FIG1 , which is a schematic structural diagram of the rainwater outlet purification device 10 applicable to a rigid upright revetment provided in an embodiment of the present application. In order to more clearly illustrate the structure of the rainwater outlet purification device 10 applicable to a rigid upright revetment, the rainwater outlet purification device 10 applicable to a rigid upright revetment will be introduced below in conjunction with the accompanying drawings.

[0044] For example, please refer to FIG. 1 , a rainwater outlet purification device 10 suitable for a hard vertical revetment includes an outlet shaft 100, a sedimentation shaft 200, an inner chamber 300, an outer chamber 400, a water passage 500, a filter material 600 and a grille 700. The outlet shaft 100 is arranged at the drain outlet for collecting rainwater from the drain outlet. The outlet shaft 100 is connected to the sedimentation shaft 200 through the water passage 500. The water passage 500 is arranged at the bottom of the inner chamber 300. A grille 700 is arranged in the water passage 500, and the grille 700 can realize the communication between the water passage 500 and the inner chamber 300, so that the rainwater in the water passage 500 enters the inner chamber 300 for filtration. The top of the inner chamber 300 is connected to the outer chamber 400 through the connecting window 101. The sedimentation shaft 200 is also connected to the outer chamber 400 through the water seepage window 102. The inner chamber 300 is arranged adjacent to the outer chamber 400. The top of the outer chamber 400 is lower than the top of the inner chamber 300. The outer chamber 400 is provided with a water outlet 103. The inner chamber 300 and the outer chamber 400 are respectively filled with filter materials 600.

[0045] The above-mentioned rainwater outlet purification device 10 suitable for hard upright revetments is simple to operate, low in cost, and occupies a small area. It can also be used as a part of the hard revetment without occupying the water area, and can also protrude a part of the revetment to be used as a viewing platform and a rest platform. It can efficiently deposit silt and suspended matter in the vertical shafts on both sides, and regularly clean them with a suction truck, taking into account the filtering, purification and drainage functions. At the same time, it also reduces the scouring of the river and lake bottom sediments by the water flow through the dispersed drainage outlets, and reduces the release of nutrients in the bottom sediments.

[0046] In some embodiments, the number of the sedimentation shafts 200 is multiple. At least one sedimentation shaft 200 is respectively arranged on both sides of the outlet shaft 100. Each sedimentation shaft 200 is communicated with the outlet shaft 100 through a water passage 500. An inner cabin 300 is respectively arranged above each water passage 500. Referring to FIG. 2 and FIG. 5, FIG. 2 is a schematic diagram of a rainwater outlet purification device 10 suitable for a hard vertical revetment according to an embodiment of the present invention, and FIG. 5 is a cross-sectional schematic diagram of a rainwater outlet purification device 10 suitable for a hard vertical revetment according to an embodiment of the present invention from the position of a partition wall window. Sedimentation shafts 200 are respectively arranged on both sides of the outlet shaft 100, and the two sedimentation shafts 200 are respectively communicated with the outlet shaft 100 through a water passage 500. Referring to FIG. 1 and FIG. 4, FIG. 4 is a schematic diagram of the shafts and cabin partition walls on both sides of the rainwater outlet purification device 10 suitable for a hard vertical revetment according to an embodiment of the present invention, and two sedimentation shafts 200 are arranged.

[0047] In some embodiments, the water passage 500 is connected to the bottom of the discharge shaft 100. The water passage 500 is inclined, and gradually descends from the discharge shaft 100 to the sedimentation shaft 200. As shown in FIG. 2, the water passage 500 has a certain slope, which is used to divert rainwater to the sedimentation shafts 200 on both sides. The water passage 500 is inclined and gradually descends, which can facilitate the silt and suspended matter trapped in the filter material 600 of the inner chamber 300 to descend and flow into the sedimentation shaft 200 when the rainwater level drops after the rain stops, so that the silt and suspended matter are deposited in the sedimentation shaft 200, which is convenient for subsequent cleaning.

[0048] In some of the embodiments, the top height of the sedimentation shaft 200 is lower than the top height of the inner chamber 300 and higher than the top height of the outer chamber 400 .

[0049] In some embodiments, as shown in FIG3 , the filter material 600 filled in the inner chamber 300 includes a first layer 610, a second layer 620, and a third layer 630, which are sequentially distributed from bottom to top. The particle sizes of the filter material in the first layer 610, the second layer 620, and the third layer 630 decrease in sequence. Preferably, the first layer 610 is a large-sized pebble layer, the second layer 620 is a small-sized pebble layer, and the third layer 630 is a crushed stone layer.

[0050] In some embodiments, the ratio of the heights of the first layer 610, the second layer 620, and the third layer 630 is 3:3:(4-5). For example, the ratio of the heights of the first layer 610, the second layer 620, and the third layer 630 is 3:3:4. For another example, the ratio of the heights of the first layer 610, the second layer 620, and the third layer 630 is 3:3:5.

[0051] Preferably, in one of the specific embodiments, the pebbles in the large-sized pebble layer are smooth in appearance, with a particle size of 8 cm to 12 cm and a layer height of 30 cm to 40 cm. The pebbles in the small-sized pebble layer are smooth in appearance, with a particle size of 3 cm to 5 cm and a layer height of 30 cm to 50 cm. The crushed stones in the crushed stone layer have a particle size of 1 cm to 2 cm and a layer height of 3 cm to 50 cm.

[0052] In some embodiments, as shown in FIG3, FIG3 is a schematic cross-sectional view of a rainwater outlet purification device 10 for hard vertical revetments according to an embodiment of the present invention from the two side shafts to the middle shaft, and the filter material particle size of the filter material 600 filled in the outer chamber 400 is substantially the same as the filter material particle size of the third layer 630 filled in the inner chamber 300. It should be noted that, since the particle sizes of the filter material 600 are different, the same particle size mentioned above means that the particle size range is basically within a relatively small range, rather than that the particle sizes of all the filter materials 600 are exactly the same.

[0053] In some embodiments, there are multiple communication windows 101. The number of communication windows 101 can be set according to the actual space size of the venue.

[0054] In some of the embodiments, as shown in FIG. 3 , the height of the communication window 101 is flush with the top of the outer chamber 400 .

[0055] In some embodiments, as shown in FIG4 , the water seepage window 102 is close to the bottom of the outer chamber 400. The water seepage window 102 is located at the bottom upper part of the partition wall between the sedimentation shaft 200 and the outer chamber 400, slightly higher than the lower opening of the water passage 500, and the water seepage window 102 is filled with permeable concrete for rainwater to seep from the sedimentation shaft 200 to the outer chamber 400.

[0056] In some embodiments, a water outlet 103 is provided at the bottom of the outer chamber 400. The water outlet 103 is located at the bottom of the outer chamber 400, as shown in FIG4 , the bottom of the water outlet 103 is slightly higher than the bottom of the water seepage window 102, and the water outlet 103 is provided with a stainless steel grille, and the surface of the stainless steel grille is coated with a corrosion-resistant paint.

[0057] In some embodiments, the rainwater outlet purification device 10 for hard vertical revetments further includes landscape flowers and plants 800. The landscape flowers and plants 800 are planted on the top of the outer chamber 400. The landscape flowers and plants 800 are local drought-resistant varieties with well-developed root systems and are located on the top of the outer chamber 400. The landscape flowers and plants 800 can increase the aesthetics on the one hand, and on the other hand, can perform plant-type purification through the plant system to improve the purification effect.

[0058] In some embodiments, the rainwater outlet purification device 10 for use on a rigid vertical revetment further comprises a safety fence 900. The safety fence 900 is installed on the top of the inner cabin 300. The safety fence 900 is used to ensure safety when used as a viewing and resting platform. The safety fence 900 can increase the safety factor of the rainwater outlet purification device 10 for use on a rigid vertical revetment.

[0059] In some embodiments, as shown in Fig. 2, the drain port of the present application is arranged at the central position of the drainage shaft. The drain port is arranged at the central position to reduce the impact of the drain port on the side wall of the drainage shaft when draining water in the rainy season.

[0060] In some embodiments, the above-mentioned grille 700 can be a stainless steel rib grille 700. Preferably, the grille 700 is coated with a corrosion-resistant paint.

[0061] In some embodiments, the rainwater outlet purification device 10 for hard vertical revetments further comprises a cover plate 1000. The cover plate 1000 is made of a long strip of corrosion-resistant material and is located at the upper part of the sedimentation shaft 200 and the outlet shaft 100.

[0062] An embodiment of the present application also provides a rainwater outlet purification method applicable to a hard vertical revetment.

[0063] It should be noted that, in this article, unless otherwise specified, each reaction step can be carried out in the order described herein, or can be carried out in a non-sequential manner. For example, other steps may be included between each reaction step, and the order of the reaction steps may also be appropriately swapped. This can be determined by the technician based on conventional knowledge and experience. Preferably, the reaction method herein is carried out sequentially.

[0064] A method for purifying a rainwater outlet suitable for a hard vertical revetment adopts the above-mentioned rainwater outlet purification device 10 suitable for a hard vertical revetment, and comprises the following steps:

[0065] (1) After rainwater enters the drainage shaft through the drainage outlet, it enters the sedimentation shaft 200 through the water passage 500, and the water level in the sedimentation shaft 200 gradually rises.

[0066] (2) Rainwater enters the inner chamber 300 through the grille 700 in the water passage 500, and is filtered by the filter media 600 in the inner chamber 300. A small amount of mixed silt and suspended matter is retained in the inner chamber 300 by the filter media 600, while organic matter dissolved in water is adsorbed by the filter media 600 and decomposed by microorganisms on the surface of the filter media 600.

[0067] (3) After the rainwater overflows the filter material 600 in the inner chamber 300, it enters the outer chamber 400 through the connecting window 101, and is adsorbed and purified by the filter material 600 in the outer chamber 400 again before flowing out from the water outlet 103 of the outer chamber 400.

[0068] (4) When rainwater stops entering the drainage shaft, rainwater in the sedimentation shaft 200 infiltrates into the outer chamber 400 through the seepage window 102, and the water levels of the sedimentation shaft 200 and the inner chamber 300 gradually drop, while carrying part of the silt and suspended matter trapped in the filter material 600 in the inner chamber 300 down and into the sedimentation shaft 200. Since the entire device is a communicating vessel, the entire water pressure is balanced, and the height of the sedimentation shafts 200 on both sides is higher than that of the outer chamber 400. When the rainwater discharge is large and the outlet 103 is insufficient to meet the drainage demand, the rainwater level in the outer chamber 400 gradually rises and flows over the top of the outer chamber 400, meeting the large discharge demand, while reducing the scouring of the river and lake bottom sediment by the water flow and reducing the release of nutrients in the bottom sediment.

[0069] (5) Regularly check the thickness of the sediment in the sedimentation shaft 200. Before the sediment height is higher than the water seepage window 102, use a sewage suction truck to clean the sediment in the sedimentation shafts on both sides. At the same time, regularly flush the inner chamber 300 from top to bottom with water to use the water flow to remove the silt and clogging debris in the filter material 600 to maintain the filtering performance of the filter material.

[0070] In summary, compared with the conventional technology, the rainwater outlet purification device 10 of the present application applicable to a hard vertical revetment has the following beneficial effects:

[0071] (1) The sedimentation and filtration structures are separated. Most of the sediment is deposited in the sedimentation shaft 200. A small amount of sediment and suspended matter flows upward with the rainwater through the filter material 600 and is retained in the filter material 600 after being filtered. When the water level drops, part of the retained sediment and suspended matter is taken out of the filter material 600 with the water flow, thereby prolonging the clogging time of the filter material 600.

[0072] (2) The gaps between the filter media 600 from the upper layer to the lower layer gradually increase. At the same time, the filter media is on the upper layer and the water channel 500 is on the lower layer. Water can be flushed from the upper layer to the lower layer regularly to remove the silt and debris blocking the gaps by the water flow to achieve the effect of dredging. After the device has been running for a long time, if some suspended matter and a small amount of silt in the rainwater block the filler, water can be poured from the upper layer to flush the blockages into the sedimentation shaft 200 by the water flow. The operation is simple and the cost is low.

[0073] (3) Through the principle of water pressure balance of the communicating vessel, the height of the sedimentation shaft 200 is higher than that of the outer chamber 400. When the amount of rainwater discharged from the outlet is large and the outlet 103 cannot meet the water flow, the water level of the outer chamber 400 gradually increases to the top and then overflows, so that the sediment in the sedimentation shafts 200 on both sides will not overflow. Through the principle of water pressure balance of the communicating vessel, sedimentation, filtration, drainage and purification can be carried out, and the silt and suspended matter can be efficiently deposited in the shafts on both sides, and regularly cleaned with a sewage suction truck.

[0074] (4) Using the principle of artificial wetland filler filtration, rainwater is filtered from bottom to top. Under the impact of water flow and gravity, sediment is easily settled at the bottom and collected in the vertical shaft.

[0075] (5) This device occupies a small area and can also be used as part of the hard revetment without occupying the water area. It can also protrude from a part of the revetment and add a safety fence 900 on the top, which can be used as a viewing and resting platform.

[0076] (6) This device combines filtering and purification with drainage functions. It also reduces the erosion of river and lake bottom sediments by dispersing drainage outlets, thereby reducing the release of nutrients in the bottom sediments.

[0077] In the above embodiments, the description of each embodiment has its own emphasis. For parts that are not described in detail in a certain embodiment, reference can be made to the relevant descriptions of other embodiments.

[0078] The technical features of the above-described embodiments may be arbitrarily combined. To make the description concise, not all possible combinations of the technical features in the above-described 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.

[0079] The above-mentioned embodiments only express several implementation methods of the present invention, and the description thereof is relatively specific and detailed, but it cannot be understood as limiting the scope of the patent of the present invention. It should be pointed out that, for ordinary technicians in this field, several variations and improvements can be made without departing from the concept of the present invention, which all belong to the protection scope of the present invention. Therefore, the protection scope of the patent of the present invention shall be subject to the attached claims.

Claims

1. A rainwater outlet purification device suitable for hard vertical revetments, characterized in that: It includes a discharge shaft, a sedimentation shaft, an inner chamber, an outer chamber, a water passage, filter material and a grille. The discharge shaft is arranged at the drain outlet to collect rainwater from the drain outlet. The discharge shaft is communicated with the sedimentation shaft through the water passage. The water passage is penetrated through the bottom of the inner chamber. The grille is arranged in the water passage. The water passage can be communicated with the inner chamber through the grille. The top of the inner chamber is communicated with the outer chamber through a connecting window. The sedimentation shaft is also communicated with the outer chamber through a water seepage window. The inner chamber and the outer chamber are arranged adjacent to each other. The top of the outer chamber is lower than the top of the inner chamber. The outer chamber is provided with a water outlet. The inner chamber and the outer chamber are respectively filled with filter material.

2. The rainwater outlet purification device suitable for hard vertical revetment according to claim 1 is characterized in that: There are multiple sedimentation shafts, and at least one sedimentation shaft is respectively arranged on both sides of the discharge shaft. Each sedimentation shaft is connected to the discharge shaft through the water passage, and the inner chamber is respectively arranged above each water passage.

3. The rainwater outlet purification device suitable for hard vertical revetment according to claim 1 is characterized in that: The water passage is connected to the bottom of the discharge shaft, and the water passage is inclined, and gradually descends from the discharge shaft to the sedimentation shaft.

4. The rainwater outlet purification device suitable for hard vertical revetment according to claim 1 is characterized in that: The top height of the sedimentation shaft is lower than the top height of the inner chamber and higher than the top height of the outer chamber.

5. The rainwater outlet purification device suitable for hard vertical revetments according to any one of claims 1 to 4, characterized in that: The filter material filled in the inner cabin includes a first layer, a second layer and a third layer distributed in sequence from bottom to top, wherein the particle sizes of the filter material in the first layer, the second layer and the third layer decrease in sequence.

6. The rainwater outlet purification device suitable for hard vertical revetment according to claim 5 is characterized in that: The particle size of the filter material filled in the outer chamber is the same as the particle size of the third layer of filter material filled in the inner chamber.

7. The rainwater outlet purification device suitable for hard vertical revetments according to any one of claims 1 to 4 and 6, characterized in that: The number of the connected windows is multiple; and / or, the height of the communication window is flush with the top of the outer cabin; and / or, the water seepage window is close to the bottom of the outer compartment; And / or, the water outlet is provided at the bottom of the outer compartment.

8. The rainwater outlet purification device suitable for hard vertical revetments according to any one of claims 1 to 4 and 6, characterized in that: The rainwater outlet purification device suitable for hard upright revetments also includes landscape flowers and plants, which are planted on the top of the outer cabin.

9. The rainwater outlet purification device suitable for hard vertical revetments according to any one of claims 1 to 4 and 6, characterized in that: The rainwater outlet purification device suitable for hard vertical revetments also includes a safety fence, which is installed on the top of the inner cabin.

10. A method for purifying rainwater outlets suitable for hard vertical revetments, characterized in that: The rainwater outlet purification device applicable to a hard vertical revetment according to any one of claims 1 to 9 comprises the following steps: After the rainwater enters the drainage shaft through the drainage outlet, it enters the sedimentation shaft through the water passage, and the water level in the sedimentation shaft gradually rises; Rainwater enters the inner cabin through the grille in the water passage, and is filtered by the filter material in the inner cabin. A small amount of mixed sediment and suspended matter is retained in the inner cabin by the filter material, and at the same time, organic matter dissolved in water is adsorbed by the filter material and decomposed by microorganisms on the surface of the filter material. After the rainwater overflows the filter material in the inner cabin, it enters the outer cabin through the connecting window, and then flows out from the water outlet of the outer cabin after being adsorbed and purified by the filter material in the outer cabin again; When rainwater stops entering the drainage shaft, the rainwater in the sedimentation shaft infiltrates into the outer chamber through the seepage window, and the water level of the sedimentation shaft gradually drops, carrying with it part of the silt and suspended matter trapped in the filter material in the inner chamber and flowing into the sedimentation shaft.

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