Slope protection drainage anti-backflow device

Abstract

The utility model discloses a slope protection drainage anti-backflow device, which belongs to the field of anti-backflow devices and comprises a pipe body, a water outlet is arranged at the left end of the pipe body, a water stop turning plate is arranged in the middle of the water outlet, a drainage cavity is arranged at the left end of the pipe body, a water inlet is arranged at the right end of the pipe body, and a water collecting horn mouth is arranged at the water inlet. And a filtering system is arranged in the middle of the pipe body. In the dry season, the water level of the river channel is lower than the height of the turning plate, the turning plate is opened, and water in the soil layer in the river levee passes through the filtering layer through the water collecting horn mouth, so that collapse of the river levee, riverbed heightening and eutrophication of the water body can be effectively prevented; and in the wet season, the water level of the river channel is higher than the height of the turning plate, and the turning plate is closed. Water flow in the river channel can be prevented from scouring and invading the river bank through the drainage pipe to form a cavity to cause river bank collapse risk. Meanwhile, the slope protection drainage anti-backflow device can be extensively used on a river rainwater drainage pipeline in an urban area, and the phenomenon of eutrophication of a river channel due to the fact that urban rainfall is drained into the river channel is prevented.

Description

Technical Field

[0001] The present application belongs to the field of backflow prevention devices, and specifically relates to a slope protection drainage backflow prevention device. Background Art

[0002] At present, the protection of river bank slopes will directly affect the surrounding ecological environment, so it needs to be treated by a combination of soft and hard methods, that is, hard treatment by cutting or repairing the top slope, and soft treatment by greening the river channel and construction site. The so-called soft treatment refers to ensuring that the greening construction project carried out in the greening project can adapt to the layout of the main project as much as possible. Specifically, the main project should be linear and reasonably arranged along the line according to various conditions such as plant growth height and other shapes. In addition, after the river embankment is constructed, the ground can be paved with natural lawns, usually according to the undulations of the terrain, to create a unique landscape and ensure mutual coordination with the surrounding environment.

[0003] Usually after the soft treatment of the river bank, a PVC pipe is pre-buried on the river surface of the bank as a drainage pipe, which can allow excess water in the river bank to flow into the river through the drainage pipe. Only part of the water in the river bank can be discharged. During the rainy period in summer, the water-rich soil in the river bank flows into the river through the drainage pipe, which may cause the risk of river bank collapse and high riverbed. During the flood season, the river water will wash the river bank through the drainage pipe to form a cavity, causing the river bank to burst.

[0004] Referring to an ecological slope protection for a water conservancy project with publication number CN108239961B, it includes a base, an upper slope, a lower slope and an isolation platform, wherein the upper slope and the lower slope are located on the inclined surface of the base, the isolation platform is located between the upper slope and the lower slope, the upper slope, the lower slope and the isolation platform are sequentially paved with a soil cloth layer, a crushed stone layer and a concrete layer from the inside to the outside, an anti-corrosion layer is provided on the lower slope and on the concrete layer, columns and isolation nets are provided on the isolation platform, a green vegetation layer is provided on the upper slope and on the concrete, and a collecting trough, guardrails and flower beds are provided on the base. However, this solution requires an overall transformation of the slope protection, which takes a long time to construct and has a high construction cost.

[0005] For this reason, we propose a slope protection drainage backflow prevention device to solve the above problems. Summary of the invention

[0006] The technical problem to be solved by the present application is to provide a slope protection drainage backflow preventer to solve the problems mentioned in the background technology or to achieve better technical effects.

[0007] The applicant has obtained the technical solution of this application through practice and summary: a slope protection drainage and anti-backflow device, including an anti-backflow device and a filtering device; the anti-backflow device includes a pipe body, a water-stop flap is fitted at one end of the pipe body away from the river embankment, a floating ball is connected to the inner wall of the pipe body, and multiple partition plates are arranged inside the pipe body; when the water-stop flap is closed, it effectively prevents river water from flowing back into the pipeline and scouring the river embankment. When the water volume is too large, the floating ball floats up to block the water outlet of the drainage cavity and prevent further water flow from flowing in.

[0008] The filtering device includes a partition chamber composed of multiple partition plates inside the pipe body, and multiple layers of filter materials are filled inside; a sealing and pore-closing plate is installed at the fixed end of the pipe body; it effectively prevents soil erosion of the river embankment and eutrophication of the river water, as well as the problem of riverbed elevation.

[0009] Preferably, a drainage cavity is provided at the free end of the pipe body, and a water collection cavity is provided at the fixed end; it can temporarily store a part of the water volume.

[0010] Preferably, the drainage cavity includes free-end partition plates, and the free-end partition plates cooperate with each other to form a hollow opening.

[0011] Preferably, the filter materials inside the partition chamber of the filtering device are, in the direction away from the river embankment, a filter cloth layer, an activated carbon layer, a fine sand layer, and a coarse sand layer in sequence; it effectively prevents water-rich soil from flowing into the river along the drainage pipe, causing the collapse of the river embankment and the increase of the riverbed; it reduces the risk of water eutrophication.

[0012] Preferably, a gravel filling area is provided inside the water collection cavity, and a partition plate is provided at the junction of the gravel filling area and the filter layer; it initially intercepts large pieces of sediment and stones.

[0013] Preferably, a water collection bell mouth is provided at the rear of the water collection cavity; the outer surface of the water collection bell mouth is made of a permeable material; it is beneficial for water collection, and the water collection bell mouth is detachable; the pipe body can be used as a rainwater pipe.

[0014] Preferably, a water-stop flap is hinged to the upper end inside the water outlet.

[0015] Preferably, the outer surface of the pipe body is made of an anti-corrosion material; it can extend the service life, and a liquid level gauge is provided on the outer surface of the pipe body; it can help with leveling during construction.

[0016] Preferably, the pipe body is detachable up and down; it is convenient to place the filtering device during construction.

[0017] Preferably, the filter materials are modular; it is convenient for installation.

[0018] Compared with the prior art, the following technical effects can be obtained in this application:

[0019] A slope protection drainage and anti-backflow device includes an anti-backflow device and a filtering device; the anti-backflow device includes a pipe body, a water-stop flap is fitted at one end of the pipe body away from the river embankment, a floating ball is connected to the inner wall of the pipe body, and multiple partition plates are provided inside the pipe body; when in the dry season, the river water level is lower than the height of the flap, the flap opens, and the water in the soil layer inside the river embankment can pass through the water collection bell mouth and different levels of filter layers, which can effectively prevent the rich water-containing soil from flowing into the river along the drainage pipe, causing risks such as the collapse of the river embankment, the increase of the riverbed, and water eutrophication. When in the flood season, the river water level is higher than the height of the flap, the flap closes, which can prevent the water flow in the river from scouring and eroding the river embankment through the drainage pipe to form a cavity and causing the risk of river embankment breach. When the flap fails to close in time and the amount of water flowing back into the pipe body is too large, the floating ball floats up to block the water outlet of the drainage cavity and prevent further water flow.

[0020] The five-layer filter layer is sequentially provided with a filter cloth layer, an activated carbon layer, a fine sand layer, a coarse sand layer, and a wire mesh from right to left, which can better filter impurities in the water; partition bins are provided between the filtering areas, which can better ensure the filtering effect; a water-stop flap is hinged to the upper end inside the water outlet, which can better open and close the water outlet according to the water level relationship; the water collection cavity is in a horn shape, which can effectively collect the water in the aquifer inside the river embankment. At the same time, this slope protection drainage and anti-backflow device can be extended and used on the rainwater discharge pipes of urban area rivers to prevent the phenomenon of river eutrophication caused by urban precipitation discharged into the river. Brief Description of the Drawings

[0021] In order to more clearly illustrate the technical solutions in the embodiments of the present application or the prior art, the following will briefly introduce the drawings required for use in the description of the embodiments or the prior art. Obviously, for those of ordinary skill in the art, without creative efforts, other drawings can also be obtained based on these drawings.

[0022] Figure 1 It is the front view of a slope protection drainage and anti-backflow device;

[0023] Figure 2 It is the top view of a slope protection drainage and anti-backflow device;

[0024] Figure 3 It is the working diagram of a slope protection drainage and anti-backflow device in the dry season;

[0025] Figure 4 It is the working diagram of a slope protection drainage and anti-backflow device in the flood season;

[0026] Figure 5 It is the working diagram of a slope protection drainage and anti-backflow device as a rainwater pipe;

[0027] Figure 6 It is the disassembly schematic diagram of the water collection bell mouth of a slope protection drainage and anti-backflow device.

[0028] In the figure: 1. Water-stop flap, 2. Water outlet, 3. Coarse sand layer, 4. Fine sand layer, 5. Activated carbon layer, 6. Filter cloth layer, 7. Water collection cavity, 8. Water collection bell mouth, 9. Steel wire mesh, 10. Partition chamber, 11. Pipe body, 12. Gravel filling area, 13. Drainage cavity, 14. Sealing and plugging plate, 15. Floating ball, 16. Partition plate, 17. Rainwater pipe. Specific embodiments

[0029] In order to make the objectives, technical solutions and advantages of the present application clearer and more understandable, the following further elaborates on the present application in combination with embodiments. It should be understood that the specific embodiments described herein are only used to explain the present application and are not used to limit the present application.

[0030] The following further describes the application principle of the present application in combination with the accompanying drawings and specific embodiments.

[0031] Embodiment 1:

[0032] As Figure 1-6 shown, a slope protection drainage and anti-backflow device includes an anti-backflow device and a filtering device; the anti-backflow device includes a pipe body 11, a water-stop flap 1 is fitted at one end of the pipe body 11 away from the river embankment, a floating ball 15 is connected to the inner wall of the pipe body 11, and a plurality of partition plates 16 are arranged inside the pipe body 11; the filtering device includes a partition chamber 10 formed by a plurality of partition plates inside the pipe body 11, and a plurality of filter materials are filled inside; a sealing and plugging plate 14 is installed at the fixed end of the pipe body 11, water in the river embankment enters the pipeline through the sealing and plugging plate 14, large soil blocks, stones, etc. are intercepted by the sealing and plugging plate 14 and remain in the river embankment, a small amount of sediment soil enters the pipeline with the water flow, and is filtered successively through the gravel filling area 12, the filter cloth layer 6, the activated carbon layer 5, the fine sand layer 4, and the coarse sand layer 3, so that the water contains extremely few substances such as sediment that cause river eutrophication. The water flow makes the floating ball 15 float up, opens the drainage cavity 13, and the water flow jacks up the water-stop flap 1 through the water outlet 2 and flows into the river.

[0033] Embodiment 2:

[0034] When the river is in the dry season:

[0035] As Figure 3As shown in the figure: During the dry season, the water flow in the river channel is lower than the height of the water-stop flap 1. The water inside the dike is first filtered through the sealing perforated plate 14, and then secondarily filtered through the gravel filling area 12 in the water collecting bell mouth 8 and accumulates in the water collecting cavity 7. It passes through the filter cloth layer 6, activated carbon layer 5, coarse sand layer 3, etc. When the water content inside the dike is too high, the water inside the dike is first filtered through the gravel filling area 12 in the water collecting bell mouth 8 via the sealing perforated plate 14 and accumulates in the water collecting cavity 7. After being filtered layer by layer through the filter cloth layer 6, activated carbon layer 5, and coarse sand layer 3, it pushes the water-stop flap 1 to turn upwards significantly through the water outlet 2 and flows into the river channel. This prevents the rich water-containing soil inside the river dike from flowing into the river along the drainage pipe, reducing the risk of river dike collapse and riverbed elevation.

[0036] Embodiment 3:

[0037] When the river channel is in the flood season:

[0038] As Figure 4 shown in the figure: During the flood season, the water flow in the river channel is higher than the height of the water-stop flap 1. The water-stop flap 1 is horizontally forced by the river water flow, and the water-stop flap 1 closes, preventing the water flow from entering the pipeline and scouring the river dike to form a cavity, thus reducing the risk of river dike collapse. When there is river water seepage and the water-stop flap 1 fails to close in time, the floating ball 15 floats up to block the drainage cavity 13, preventing the river water from further infiltrating into the pipeline and preventing the river water from scouring the river dike to form a cavity, thus reducing the risk of river dike collapse.

[0039] Embodiment 4:

[0040] As Figure 5 shown in the figure, which is the same as Embodiment 2 and Embodiment 3 in terms of the usage scenario and method. The difference is that the water collecting bell mouth 8 of this device is removed and connected to the rainwater pipeline 17. At this time, no filter material is filled in the filtration system, and only the wire mesh 9 is retained, which can drain the water, preventing the rich water-containing soil inside the river dike from flowing into the river along the drainage pipe and preventing the river water from scouring the river dike, thus avoiding the problem of river dike collapse.

[0041] Embodiment 5:

[0042] A usage method of a slope protection drainage and anti-backflow device includes the following steps:

[0043] Step 1: Measuring and setting out

[0044] According to the construction drawings, the excavation boundary is marked. At every 10 meters, wooden wedges are nailed at both ends, and a measuring rope is used to fix and straighten in the middle. A spade is used to shovel quicklime and sprinkle the lime line along the edge of the measuring rope while knocking.

[0045] Step 2: Earthwork excavation

[0046] To accelerate the project progress, large earthwork machinery such as excavators, loaders, and heavy trucks are used for collaborative operations in this project. The overall earthwork excavation is carried out in sections and zones. The sequence and method of earthwork excavation must be consistent with the design requirements and follow the principles of "supporting first when excavating trenches, excavating after supporting, excavating in layers, and strictly prohibiting over-excavation"; the excavation sequence is carried out in sections and zones according to the earthwork excavation operation construction drawings. The depth of earthwork excavation ranges from 2 to 5 meters and is excavated layer by layer in 2 to 3 layers. When organizing construction in multiple areas with multiple excavators and multiple working faces, the width of each working face should be greater than 20m. During the excavation process, surveyors use RTK to measure the excavation depth at any time to avoid over-excavation. After excavating to the specified depth, 300mm is reserved for manual trimming.

[0047] Step Three: Construction of the ecological retaining wall

[0048] Lifting holes are reserved on both sides of the precast grid. During lifting, steel wire ropes are passed through the lifting holes on both sides for hoisting construction. To prevent the steel wire ropes from damaging the edges and corners of the components, the steel wire ropes in contact with the components can be wrapped with plastic pipes or fiber flat belts can be used for hoisting. After hoisting to the specified position, place the grid. Use a tubular liquid level gauge for horizontal measurement. If the level is out of tolerance, gently lift the hook for secondary leveling. The leveling can be achieved by placing steel gaskets under the grid. During the ecological construction process, embed and fix the slope protection drainage anti-backflow device on the side of the retaining wall.

[0049] Step Four: Dike construction

[0050] Before filling, all caves within the construction area or sundries such as tree roots and garbage on the base surface should be processed and cleared. The thickness of each layer of soil laid should be determined according to the requirements of soil quality, density, and the performance of the machinery, but each layer should not exceed 30cm. When using a roller compactor to compact the fill, the driving speed should be controlled. In this project, it is planned to use a roller compactor to compact in layers, with the layer thickness not exceeding 30cm, and leveling should be carried out while compressing. During compaction, the wheel (rammer) marks should overlap each other to prevent missed compaction or missed ramming. When the length-width ratio is relatively large, the filling should be carried out in sections. The joint at each layer should be made into a slope shape, with the rolling marks overlapping by about 0.5 - 1.0m, and the staggered distance between the upper and lower layers should not be less than 1m.

[0051] Step Five: Ecological vegetation restoration

[0052] After the dike construction is completed, ecological slope protection vegetation restoration is carried out according to the requirements.

[0053] For those skilled in the art, it is obvious that the present application is not limited to the details of the above exemplary embodiments, and the present application can be implemented in other specific forms without departing from the spirit or basic characteristics of the present application. Therefore, from any point of view, the embodiments should be regarded as exemplary and non-limiting. The scope of the present application is defined by the appended claims rather than the above description. Therefore, all changes falling within the meaning and scope of the equivalent elements of the claims are intended to be embraced within the present application.

[0054] In addition, it should be understood that although this specification is described according to embodiments, not every embodiment only contains an independent technical solution. This narrative manner of the specification is only for clarity. Those skilled in the art should regard the specification as a whole, and the technical solutions in each embodiment can also be appropriately combined to form other embodiments that can be understood by those skilled in the art.

Claims

1. A slope protection drainage backflow prevention device, characterized in that: It comprises an anti-backflow device and a filtering device; the anti-backflow device comprises a pipe body (11), one end of the pipe body (11) away from the river bank is equipped with a water-stop flap (1), the inner wall of the pipe body (11) is connected to a floating ball (15), and a multi-layer partition plate (16) is arranged inside the pipe body (11); The filtering device comprises a partition chamber (10) composed of multiple layers of partition plates inside a tube body (11), which is filled with multiple layers of filter material; a sealing dense hole plate (14) is installed at the fixed end of the tube body (11).

2. A slope protection drainage backflow prevention device according to claim 1, characterized in that: The free end of the tube body (11) is provided with a drainage cavity (13), and the fixed end is provided with a water collection cavity (7).

3. A slope protection drainage backflow prevention device according to claim 2, characterized in that: The drainage cavity (13) comprises free end partition plates, and the free end partition plates cooperate with each other to form a hollow opening.

4. A slope protection drainage backflow prevention device according to claim 3, characterized in that: The inner wall of the drainage cavity (13) at the free end of the tube body (11) is connected to a floating ball (15).

5. The slope protection drainage backflow prevention device according to claim 1, characterized in that: The filter material in the filter device is modular filter material. The filter material inside the filter device separation chamber (10) is, in order of moving away from the river bank, a filter cloth layer (6), an activated carbon layer (5), a fine sand layer (4), and a coarse sand layer (3).

6. A slope protection drainage backflow prevention device according to claim 2, characterized in that: A gravel filling area (12) is provided inside the water collection chamber (7), and a partition plate (16) is provided at the junction of the gravel filling area (12) and the filter layer.

7. The slope protection drainage backflow preventer according to claim 1, characterized in that: The water-stop flap (1) is hingedly connected to the upper edge of the pipe body (11) away from the river bank.

8. The slope protection drainage backflow prevention device according to claim 2, characterized in that: A water collecting bell mouth (8) is provided at the rear of the water collecting chamber (7); the outer surface of the water collecting bell mouth (8) is made of a water-permeable material; and the water collecting bell mouth (8) is detachable.

9. The slope protection drainage backflow preventer according to claim 1, characterized in that: A liquid level gauge is provided on the surface of the tube body (11), and the upper and lower parts of the tube body (11) are detachable.

10. A slope protection drainage backflow prevention device according to claim 9, characterized in that: The outer surface of the tube body (11) is made of anti-corrosion material.

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