Rainwater drainage device capable of draining water by means of self weight
By designing a rainwater drainage device that relies on its own weight in the city, using the seepage properties of the strong permeable soil layer for rapid drainage, the problem of low rainwater drainage efficiency during heavy rainstorms is solved, efficient drainage without mechanical power is achieved, and cost and maintenance difficulties are reduced. .
Patent Information
- Application Number
- CN202421000108.6
- Authority / Receiving Office
- CN · China
- Patent Type
- Utility models(China)
- Current Assignee / Owner
- Filing Date
- 2024-05-10
- Publication Date
- 2025-01-07
- Estimated Expiration
- 2034-05-10
AI Technical Summary
The existing urban drainage technology often causes rainwater to be unable to drain into the river channel or backflow during heavy rains, and the return injection wells are prone to silt and blockage during sponge city construction, resulting in low drainage efficiency.
Design a rainwater drainage device that relies on its own weight, including an outer pipe, a closed steel plate, a hemisphere filter cover and a floating cover. By setting a seepage micropore array in a strong permeable soil layer, it uses the permeability of the formation to perform rapid drainage and deflate through one-way Valves and permeable geotextiles enable rapid drainage without mechanical power.
It realizes rapid excretion of rainwater to the surrounding formations, avoids siltation and blockage, reduces project costs and energy consumption, is convenient to maintain, and does not require manual operation.
Smart Images
Figure CN222314203U_ABST
Abstract
Description
Technical Field
[0001] The utility model belongs to the technical field of urban drainage, and in particular relates to a rainwater drainage device which drains water by relying on its own weight. Technical Background
[0002] With the acceleration of urbanization and the continuous increase in the hardening rate of land, urban waterlogging caused by heavy rains has always been a major problem that plagues urban construction. Humans have tried many ways to improve the drainage problem. The first thing that comes to mind is to build a large number of rainwater pipes. So far, this method is still the main means of drainage, but the cost of engineering (construction and maintenance) is huge, and the social impact during construction is large. In addition, rainwater pipes are generally discharged to existing rivers. When it rains heavily, the drainage capacity of the river is limited, the water level rises, and it exceeds the elevation of the pipe outlet. It is often the case that rainwater cannot be discharged into the river or even backflows. In recent years, various places have also systematically promoted the construction of sponge cities, mainly through wetlands, lakes and artificial storage facilities, rainwater is collected on the ground, infiltrated into the ground and stored. There are mainly two ways. One is to collect rainwater through ground wetlands, lakes, etc., and infiltrate through the ground soil layer. Since the shallow ground layer is clay layer, the permeability coefficient is generally 1.0X10 -5 ~ 10 -7 cm / s, the permeability is very poor, and the surface water cannot be infiltrated into the ground in time. At the same time, this method occupies a large area. Another method is to consider that there are usually strong permeable layers such as silt, sand or gravel layers 5 to 10 meters below the surface, and the permeability coefficient is generally 1.0X10 -3 ~ 10 -1 cm / s, and its permeability is hundreds to tens of thousands times higher than that of shallow clay. It is pressurized into the ground through the recharge well. This method generally requires equipment such as submersible pumps, which need to be operated and maintained regularly. At the same time, during operation, in clear weather, when the groundwater level is higher than the water level in the recharge well, the groundwater will infiltrate back into the recharge well. Driven by the seepage force, fine clay particles in the shallow layer of the surface will be brought into the recharge well, causing siltation and blockage, resulting in a significant decrease in the recharge rate, and even causing the recharge well to lose its capacity and be abandoned; at the same time, clay is used for backfill near the ground in the recharge well, but due to limited construction space, the compaction of the backfill clay cannot be guaranteed, and the water and gas in the well can easily communicate with the ground through this backfill part. Even if grouting is performed at the backfill, the expected effect cannot be achieved due to the inevitable gap between the backfill material and the original soil layer. Summary of the invention
[0003] The utility model aims to provide a rainwater drainage device which has low energy consumption and cost and relies on its own weight for drainage. It does not rely on mechanical power and can quickly drain rainwater to the surrounding strata through a highly permeable soil layer. During use, it can isolate external particles and avoid siltation and blockage.
[0004] The rainwater drainage device provided by the utility model, which drains water by self-weight, comprises an outer pipe, a closed steel plate, a hemispherical filter cover and a floating cover; wherein:
[0005] The outer tube is a long straight tube that can be vertically pressed and installed underground. The outer tube is divided into two sections, an upper section and a lower section, wherein the upper section is installed above the ground and the lower section is installed below the ground.
[0006] The upper section side wall is provided with a plurality of side wall water inlet holes, and the lower section side wall is provided with a plurality of water seepage micropores; wherein the plurality of water seepage micropores form a micropore array, and there are a total of a plurality of micropore arrays, which are arranged from top to bottom and around the side wall at intervals (vertically only arranged within the height range of the highly permeable soil layer);
[0007] For each microporous array arranged in the vertical direction, guide grooves are provided on both sides of the microporous array; the width of the closed steel plate matches the guide grooves of a microporous array, and the closed steel plate can be closely fixed on the inner wall of the outer tube along the guide grooves, and seal all the water seepage micropores on the microporous array; and the closed steel plate can be pulled upward out of the outer tube along the guide grooves;
[0008] A circle of raised limiting ribs is provided at the boundary between the upper section and the lower section of the outer tube;
[0009] The hemispherical filter cover is a hemispherical cover with a diameter matching the inner diameter of the outer tube, with a plurality of water-permeable holes on the surface, which is inserted from the top opening of the outer tube and is limited by the limiting ribs to be located in the upper section of the outer tube; the hemispherical filter cover is located below the water inlet hole on the side wall;
[0010] The floating cover can be fixedly covered at the top opening of the outer tube to seal the outer tube; the floating cover is provided with an air hole, and the air hole is provided with a one-way air release valve for exhausting the air in the outer tube.
[0011] In the utility model, the hemispherical filter cover is covered with a water-permeable geotextile, and the water-permeable geotextile is provided with an iron pressing frame to fix the water-permeable geotextile on the hemispherical filter cover.
[0012] In the utility model, the main body of the one-way air release valve is cylindrical, divided into an upper and lower area, with the top end closed and the bottom end open; the diameter of the upper section is larger than the diameter of the lower section, and the interior is hollow; a plurality of air holes for exhaust are provided on the main body of the upper section area; a steel ball with a diameter larger than the diameter of the lower section and smaller than the diameter of the upper section is provided in the main body, and the steel ball can fall on the junction of the upper and lower sections due to its own weight to seal the lower section; a sealing rubber pad is provided at the junction of the upper and lower sections where the steel ball contacts and closes.
[0013] The outer side of the bottom end of the one-way air relief valve shell is provided with a matching external thread, so that the one-way air relief valve can be directly screwed onto the floating cover.
[0014] In the utility model, the diameter of the water seepage micropores is 1.5-4 cm, the spacing between the water seepage micropores is 2-4 cm, and the micropore array has 1-5 rows, which are arranged at equal intervals around the outer tube; the positions of the water seepage micropores are set within the range of the strong permeable layer according to geological survey data;
[0015] Preferably, the diameter of the water seepage micropores is 2 cm, the spacing between the water seepage micropores is 2.5 cm, the micropore array has 4 rows, and is arranged at equal intervals around the outer tube, and each array occupies a 40° arc range of the outer tube on a plane.
[0016] In the utility model, the outer tube is a steel tube.
[0017] In the present invention, the weakly permeable layer section of the land generally has a permeability coefficient of ≤1.0X10 -5 cm / s; the permeability coefficient of the strong permeable layer is ≥1.0X10 -3 cm / s.
[0018] The construction method of the utility model has the following steps:
[0019] (1) In a relatively low-lying green space, measure the depth of the highly permeable layer such as silt, sand or gravel under the soil at the construction site, and preset the microporous array area on the outer tube at the corresponding depth position;
[0020] (2) Use a pipe shaking machine to press the lower section of the outer pipe into the ground;
[0021] At this time, the outer tube is tightly attached to the outer soil layer, with no gap between them; the microporous array area of the lower section of the outer tube is sealed by the internal closed steel plate, the closed steel plate area covers the microporous array area and fits tightly with the outer tube, so that groundwater and gas cannot enter the tube along the side wall of the outer tube;
[0022] (3) Excavate and clean the soil inside the outer tube; since the outer tube hole array is sealed by a closed steel plate, the clay particles and water in the highly permeable layer section will not enter the outer tube through the microporous array during the excavation process;
[0023] After excavation and cleaning, backfill with gravel with good roundness and uniform particle size;
[0024] (4) Pull out the closed steel plate along the guide groove;
[0025] (5) Place the hemispherical filter cover with holes covered with a permeable geotextile on the upper limit rib inside the outer tube, place the pressure iron frame on the hemispherical filter cover to press the permeable geotextile, and cover the top of the outer tube with a floating cover with a one-way air release valve and secure it.
[0026] When the utility model is used, during rainy days, rainwater will gather in low-lying areas, and the green land around the rainwater drainage device (well) will slow down the water flow speed and precipitate large substances and water. At this time, the accumulated water flows into the outer pipe through the water inlet hole on the upper side wall of the outer pipe, and the water flows through the hemispherical filter cover with holes covered with a permeable geotextile to filter out suspended particles in the water, thereby preventing fine particles from clogging the drainage channel. At the same time, the hemispherical structure is adopted, and the surface area is doubled compared to the circular plane, so that the accumulated water can be discharged into the lower section space of the outer pipe more quickly.
[0027] As rainwater is continuously injected, the water level in the outer tube continues to rise, and the original gas inside is gradually discharged outward. As rainwater on the ground accumulates, when the external water level exceeds the water inlet hole on the upper side wall of the outer tube and continues to rise, the gas is continuously compressed between the floating cover and the water surface in the upper section of the outer tube. The gas pressure is greater than the atmospheric pressure, and the steel ball of the one-way air release valve on the floating cover is pushed open, and the gas in the outer tube is squeezed out until the water level exceeds the outer tube. The gas in the outer tube is completely discharged, and the one-way air release valve returns to its original position and closes. At this time, the outer tube is in a state of no air pressure, and the flow rate of rainwater in the outer tube through the water seepage micropore array to the surrounding stratum strong permeable layer section will be accelerated, achieving rapid drainage;
[0028] At the same time, in order to prevent the permeable geotextile on the hemispherical filter cover from being washed away, a pressure iron frame is placed on the permeable geotextile; after a period of use, the permeable geotextile on the hemispherical filter cover can be replaced to ensure the permeability.
[0029] The beneficial effects of the utility model are:
[0030] A pipe shaker is used to press the steel pipe into the soil layer. The steel pipe is used as the outer wall of the rainwater recharge well. The steel pipe fits tightly with the original soil layer. Firstly, it can prevent water and gas from flowing between the steel pipe and the original soil layer; secondly, it can isolate the water and soil inside and outside in the weakly permeable layer such as clay, and prevent the external clay particles from entering the steel pipe and blocking the recharge well.
[0031] During use, when the rainwater reaches a certain depth, the gas in the well is completely discharged through the one-way air release valve, and the well becomes a vacuum state. Without the need for power, the rainwater can be discharged to the surrounding strata at a faster speed;
[0032] The perforated hemispherical stainless steel shell is used to pass water, which increases the water passing area. In highly permeable layers such as silt, sand or gravel, holes are opened on the steel pipe wall to quickly drain water to the surrounding strata through the highly permeable soil layer outside the side wall and the bottom of the steel pipe;
[0033] During use, maintenance is convenient. You only need to replace the permeable geotextile on the perforated hemispherical stainless steel shell at regular intervals. BRIEF DESCRIPTION OF THE DRAWINGS
[0034] Figure 1 It is a schematic diagram of the overall structure of the embodiment.
[0035] Figure 2 This is the AA section of the embodiment.
[0036] Figure 3 This is the cross section of Example BB.
[0037] Figure 4 It is a schematic diagram of the structure of the hemispherical filter cover and the pressure iron frame of the embodiment.
[0038] Figure 5 It is a schematic diagram of the internal side sectional structure of the one-way air relief valve of the embodiment.
[0039] Figure 6 It is a schematic diagram of the partial enlarged structure of the guide groove and the closed steel plate.
[0040] Numbers in the figure: 1 is the upper section, 2 is the lower section, 3 is the side wall water inlet hole, 4 is the guide groove, 5 is the closed steel plate, 6 is the water seepage micropore, 7 is the limiting rib, 8 is the limiting slot, 9 is the hemispherical filter cover, 10 is the water permeable hole, 11 is the pressure iron frame, 12 is the handle, 13 is the floating cover, 14 is the one-way air release valve, 15 is the main body shell of the one-way air release valve with a hole, 16 is the sealing rubber pad, 17 is the steel ball, 18 is the exhaust hole, and 19 is the external thread. DETAILED DESCRIPTION
[0041] The rainwater drainage device of the utility model comprises an outer pipe, a closed steel plate 5, a hemispherical filter cover 9 and a floating cover 13; wherein:
[0042] The outer tube is a long straight steel tube with a diameter of 2m, which can be vertically pressed and installed underground; the outer tube is divided into two sections, an upper section 1 of the outer tube is installed above the ground, and a lower section 2 of the outer tube is installed below the ground;
[0043] The side wall of the upper section 1 of the outer tube is provided with four rectangular side wall water inlet holes 3 which are equally spaced and surround the side wall of the outer tube, so as to ensure that a large flow of water can directly enter the outer tube;
[0044] A plurality of water seepage micropores 6 are arranged on the side wall of the lower section 2 of the outer tube; wherein the plurality of water seepage micropores 6 form a square micropore array, and there are a plurality of micropore arrays arranged from top to bottom and around the side wall at intervals; the position and coverage size of the micropore array are set according to the weak water permeability layer section and the strong water permeability layer section of the underground soil measured on the spot, which may be a double-layer structure of the upper weak water permeability layer section and the lower strong water permeability layer section, or may be a multi-stage distribution arrangement of the weak water permeability layer section and the strong water permeability layer section, and is made by drilling holes on the prefabricated outer tube according to the measured size; the principle to be followed is that the position of the micropore array of the water seepage micropores is set within the range of the strong water permeability layer according to the geological survey data;
[0045] For example, according to measurements, the underground soil is distributed as a weakly permeable layer section-strongly permeable layer section-weakly permeable layer section-strongly permeable layer section-weakly permeable layer section; the diameter of the seepage micropores is 2 cm, the spacing between the seepage micropores is 2.5 cm, the micropore array has 4 columns vertically and 2 rows horizontally, with a total of 8 micropore arrays, which are arranged at equal intervals around the outer tube, and each array occupies a 40° arc range of the outer tube on the plane.
[0046] For each column of micro-hole arrays arranged in the vertical direction, guide grooves 4 are provided on both sides of the column of micro-hole arrays, such as Figure 3 As shown; for example: it can be two relatively rolled hollow curling edges, such as Figure 6 As shown; the width of the closed steel plate 5 matches the guide groove 4 of a row of micropore arrays, and can be tightly fixed on the inner wall of the outer tube along the guide groove 4, and seal all the water-seepage micropores 6 on the row of micropore arrays; and the closed steel plate 5 can be pulled upward out of the outer tube along the guide groove 4; at the bottom of the guide groove 4, there is a limit groove 8 that limits the downward movement of the closed steel plate 5; the guide groove 4 and the limit groove 8 can be preset by welding.
[0047] A circle of raised limiting ribs 7 is provided at the boundary between the upper section 1 and the lower section 2 of the outer tube; the limiting ribs 7 can be a circle of raised strips protruding from the inner wall of the outer tube formed by stamping, or a circle of raised strips welded to the inner wall of the outer tube by welding.
[0048] The hemispherical filter cover 9 is made of metal, and is a hemispherical cover with a diameter matching the inner diameter of the outer tube. A number of water-permeable holes 10 are provided on the surface. It is inserted from the opening at the top end of the outer tube and is restricted by the limiting ribs 7 to be located in the upper section 1 of the outer tube. The hemispherical filter cover 9 is wrapped with a permeable geotextile, and a pressure iron frame 11 is provided on the permeable geotextile to fix the permeable geotextile on the hemispherical filter cover 9. The hemispherical filter cover 9 is located below the water inlet hole 3 on the side wall. The pressure iron frame 11 is formed by bending and weaving stainless steel wire, and a handle 12 for easy grip is provided on the top.
[0049] The floating cover 13 is a stainless steel metal cover, which can be fixedly covered at the top opening of the outer tube, and fixed to the top opening of the outer tube by welding a conventional structure buckle to seal the outer tube, and a detachable rubber sealing strip can be set at the interface position; the floating cover 13 is provided with an air hole, and a one-way air release valve 14 is set on the air hole;
[0050] The main body shell 15 of the one-way air release valve 14 is cylindrical, divided into an upper and lower area, with the top closed and the bottom open; the diameter of the upper section is larger than the diameter of the lower section, and the interior is hollow; a plurality of exhaust holes 18 for exhaust are provided on the main body shell in the upper section area; a steel ball 17 with a diameter larger than the diameter of the lower section and smaller than the diameter of the upper section is provided in the main body, and the steel ball 17 can fall at the junction of the upper and lower sections due to its own weight to seal the lower section; a sealing rubber pad 16 is provided at the junction of the upper and lower sections where the steel ball 17 contacts and seals; a matching external thread 19 is provided on the outer side of the bottom end of the main body shell 15 outside the one-way air release valve, so that the one-way air release valve can be directly tightened on the floating cover 13.
[0051] Usually the weak permeable layer of the land has a permeability coefficient of ≤1.0X10 -5 cm / s; the permeability coefficient of the strong permeable layer is ≥1.0X10 -3 cm / s.
[0052] The specific construction method steps are as follows:
[0053] (1) In a relatively low-lying green space, measure the depth of the highly permeable layer such as silt, sand or gravel under the soil at the construction site, and preset the microporous array area on the outer tube at the corresponding depth position;
[0054] The position and coverage size of the micro-hole array are set according to the weak permeable layer section and strong permeable layer section of the underground soil measured on the spot. According to the measured size, holes are punched on the prefabricated outer tube to make the micro-hole array;
[0055] For example, according to measurements, the underground soil is distributed as a weak permeable layer section-strong permeable layer section-weak permeable layer section-strong permeable layer section-weak permeable layer section; the diameter of the water seepage micropores is 2 cm, the spacing between the water seepage micropores is 2.5 cm, the micropore array has 4 vertical columns and 2 horizontal rows, a total of 8 micropore arrays, which are arranged at equal intervals around the outer tube, and each array occupies a 40° arc range of the outer tube on the plane; Figure 1 As shown;
[0056] (2) Use a pipe shaking machine to press the lower section of the outer pipe into the ground;
[0057] At this time, the outer tube is tightly attached to the outer soil layer, with no gap between them; the microporous array area of the lower section of the outer tube is sealed by the internal closed steel plate, the closed steel plate area covers the microporous array area and fits tightly with the outer tube, so that groundwater and gas cannot enter the tube along the side wall of the outer tube;
[0058] (3) Excavate and clean the soil inside the outer tube; since the outer tube hole array is sealed by a closed steel plate, the clay particles and water in the highly permeable layer section will not enter the outer tube through the microporous array during the excavation process;
[0059] After excavation and cleaning, backfill with gravel with good roundness and uniform particle size;
[0060] (4) Pull out the closed steel plate along the guide groove;
[0061] (5) Place the hemispherical filter cover with holes covered with a permeable geotextile on the upper limit rib inside the outer tube, place the pressure iron frame on the hemispherical filter cover to press the permeable geotextile, and cover the top of the outer tube with a floating cover with a one-way air release valve and secure it.
[0062] In the highly permeable layer section, due to the strong permeability, the water levels inside and outside the outer pipe remain connected, the water level difference is small, and the soil particles are large in size and heavy in weight, so no soil particles will be brought into the outer pipe well, causing siltation and blockage of the well.
[0063] The beneficial effects of the utility model are:
[0064] A pipe shaker is used to press the steel pipe into the soil layer. The steel pipe is used as the outer wall of the rainwater recharge well. The steel pipe fits tightly with the original soil layer. Firstly, it can prevent water and gas from flowing between the steel pipe and the original soil layer; secondly, it can isolate the water and soil inside and outside in the weakly permeable layer such as clay, and prevent the external clay particles from entering the steel pipe and blocking the recharge well.
[0065] During use, when the rainwater reaches a certain depth, the gas in the well is completely discharged through the one-way air release valve, and the well becomes a vacuum state. Without the need for power, the speed at which rainwater is discharged into the surrounding strata is accelerated;
[0066] The perforated hemispherical stainless steel shell is used to pass water, which increases the water passing area. In highly permeable layers such as silt, sand or gravel, holes are opened on the steel pipe wall to quickly drain water to the surrounding strata through the highly permeable soil layer outside the side wall and the bottom of the steel pipe;
[0067] During use, maintenance is convenient. You only need to replace the permeable geotextile on the perforated hemispherical stainless steel shell at regular intervals.
[0068] Although the above methods are illustrated and described as a series of structures for simplicity of explanation, it should be understood and appreciated that these methods are not specifically limited because according to one or more embodiments, some structures may occur in different orders and / or concurrently with other actions from those illustrated and described herein or not illustrated and described herein but understandable to those skilled in the art.
[0069] The previous description of the disclosure is provided to enable any person skilled in the art to make or use the disclosure. Various modifications to the disclosure will be apparent to those skilled in the art, and the general principles defined herein may be applied to other variations without departing from the spirit or scope of the disclosure. Thus, the disclosure is not intended to be limited to the examples and designs described herein, but should be granted the widest scope consistent with the principles and novel features disclosed herein.
Claims
1. A rainwater drainage device that drains water by its own weight, characterized in that: It includes an outer tube, a closing steel plate, a hemispherical filter cover and a floating cover; wherein: The outer tube is a long straight tube that can be vertically pressed and installed underground. The outer tube is divided into two sections, an upper section and a lower section, wherein the upper section is installed above the ground and the lower section is installed below the ground. The upper section side wall is provided with a plurality of side wall water inlet holes, and the lower section side wall is provided with a plurality of water seepage micropores; wherein the plurality of water seepage micropores form a micropore array, and there are a total of a plurality of micropore arrays, which are arranged from top to bottom and around the side wall at intervals; For each microporous array arranged in the vertical direction, guide grooves are provided on both sides of the microporous array; the width of the closed steel plate matches the guide grooves of a microporous array, and the closed steel plate can be closely fixed on the inner wall of the outer tube along the guide grooves, and seal all the water seepage micropores on the microporous array; and the closed steel plate can be pulled upward out of the outer tube along the guide grooves; A circle of raised limiting ribs is provided at the boundary between the upper section and the lower section of the outer tube; The hemispherical filter cover is a hemispherical cover with a diameter matching the inner diameter of the outer tube, with a plurality of water-permeable holes on the surface, which is inserted from the top opening of the outer tube and is limited by the limiting ribs to be located in the upper section of the outer tube; the hemispherical filter cover is located below the water inlet hole on the side wall; The floating cover can be fixedly covered at the top opening of the outer tube to seal the outer tube; the floating cover is provided with an air hole, and the air hole is provided with a one-way air release valve for exhausting the air in the outer tube.
2. The rainwater drainage device according to claim 1, characterized in that: The hemispherical filter cover is covered with a permeable geotextile, and a pressure iron frame is arranged on the permeable geotextile to fix the permeable geotextile on the hemispherical filter cover.
3. The rainwater drainage device according to claim 1, characterized in that: The main body of the one-way air release valve is cylindrical and divided into an upper and lower area, with the top end closed and the bottom end open; the diameter of the upper section is larger than the diameter of the lower section, and the interior is hollow; a plurality of air holes for exhaust are arranged on the main body of the upper section area; a steel ball with a diameter larger than the diameter of the lower section and smaller than the diameter of the upper section is arranged in the main body, and the steel ball can fall at the junction of the upper and lower sections due to its own weight to seal the lower section; a sealing rubber pad is arranged at the junction of the upper and lower sections where the steel ball contacts and seals.
4. The rainwater drainage device according to claim 1, characterized in that: The diameter of the water seepage micropores is 1.5-4 cm, the spacing between the water seepage micropores is 2-4 cm, and the micropore array has 1-5 rows, which are arranged at equal intervals around the outer tube; the positions of the water seepage micropores are set within the range of the strong permeable layer according to geological survey data.
5. The rainwater drainage device according to any one of claims 1 to 4, characterized in that: The outer tube is a steel tube.
Citation Information
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