CN205276436U - A secret device for rainwater regulation - Google Patents

Abstract

The utility model discloses an underground device for regulating and storing rainwater, which comprises a water inlet, a water storage body, a drainage component and an inspection well. A U-shaped baffle is arranged between the planting soil of the pool, a cover plate is arranged above the groove of the U-shaped baffle, and a water inlet well is arranged below the groove of the U-shaped baffle, and the water storage body includes a planting layer, Aquifer and base layer, between the planting layer and the base layer is the aquifer, the peripheral side wall of the aquifer is covered with a layer of geotextile, and the drainage components include water collection blocks, drain pipes, hydraulic A check valve, the hydraulic check valve is arranged in the inspection well and fixed on the side wall of the inspection well, and the water collecting block is arranged at the outlet of the aquifer. The utility model is an underground device for rainwater regulation and storage. The regulation, storage and discharge of rainwater does not require power and manual operation, and it can automatically store water and drain water completely according to the water level difference, and thus circulates.

Description

An underground device for rainwater regulation and storage

technical field

The utility model relates to the technical field of municipal water conservancy engineering, in particular to an underground device for regulating and storing rainwater.

Background technique

A heavy rainfall, the streets become rivers, houses are flooded, cars are sunken, traffic jams... Such scenes are repeated in cities every year. When heavy rain hits, waterlogging will occur in almost every city, and waterlogging is prevented every year. The reason is simple. The precipitation exceeds the drainage capacity of the city. The rainwater cannot be drained, and the rivers and lakes cannot be stored. Eventually, the city will suffer from stagnant water and internal waterlogging disasters.

At present, one of the methods to control urban waterlogging is to build ecological cities and green rainwater infrastructure. This method has already been implemented in foreign countries, and it has also been implemented in some cities in my country. However, the green ponds are all sunk, and the sunken part and the planted soil are used to store water. Obviously, the sunken part and soil seepage are limited, and water storage Afterwards, there is nowhere to drain, and plants are soaked in water for a long time, which is not conducive to plant growth; secondly, the initial rainwater is polluted by non-point sources, and the water quality is poor.

Another method is to build a large storage pool underground to solve urban waterlogging. This kind of rainwater storage facilities is relatively concentrated, and the storage volume is limited; the layout can only be one point, and it is not easy to achieve the purpose of obviously regulating and storing storm peaks, and it occupies a large area, requires a large investment, and has a long idle time, which affects the rainwater utilization system. economy. Actual engineering shows that in areas and cities with concentrated rainfall and heavy rain, it is difficult to solve waterlogging by building large storage tanks.

To sum up, the currently adopted green underground water storage structure is unreasonable, and the water storage is very limited, which is not conducive to waterlogging control, and the full rainwater cannot be discharged, which is not conducive to plant growth and diversity. The underground construction of a large storage tank can only be done at one point, and the rainwater collection on the opposite side requires a large investment and poor effect. Therefore, we have been exploring and thinking about how to make better use of green space to regulate and store rainwater and give full play to the role of urban green space in flood detention, seeking a good solution to urban waterlogging.

Utility model content

The purpose of this utility model is to provide an underground device for rainwater regulation and storage, by replacing the soil in a certain range below the planting soil of the greening pool as the aquifer, and configuring drainage components at the same time, using the water level in the aquifer and the water level in the inspection well The difference between water levels, automatic water storage and automatic discharge, in order to achieve the goal of rainwater storage and waterlogging control.

The purpose of this utility model is achieved through the following technical solutions:

An underground device for rainwater regulation and storage, including a water inlet, a water storage body, a drainage component, and an inspection well, the water inlet is arranged on the wall beside the greening pool, and the water inlet and the planting soil of the greening pool A U-shaped baffle is arranged between them, a cover plate is arranged above the groove of the U-shaped baffle, and a water inlet well is arranged below the groove of the U-shaped baffle, and the water storage body includes a planting layer, an aquifer, and a foundation The bottom layer, the planting layer is located at the top of the green pool, the base layer is located at the bottom of the green pool, the water storage layer is between the planting layer and the base layer, and the peripheral side wall of the water storage layer is covered with a layer Geotextile, the top side of the aquifer is connected to the bottom of the water inlet well, a drain is provided on the bottom side of the aquifer, and the drainage member includes a water collection block, a drainage pipe, a hydraulic A check valve, the hydraulic check valve is arranged in the inspection well and fixed on the side wall of the inspection well, the water collecting block is arranged at the outlet of the aquifer, and the collecting The water block can continuously infiltrate water from the aquifer. One end of the drainage pipe is connected to the water collection block, and the other end is connected to a hydraulic check valve.

Preferably, the water inlet is designed as a rectangular opening, and the water inlet is set on one side or both sides on the green retaining wall beside the green pool.

Preferably, the water inlet is provided with a vertical steel bar as a trash rack for the first trash blocking of rainwater, and a trash net is arranged on the top surface of the water inlet well for the second trash blocking of rainwater.

Preferably, the planting layer is the uppermost layer of the green pool, and the planting layer is higher than the ground or road surface.

Preferably, the aquifer is located under the planting layer, and the aquifer is filled with a porous material with permeability and adsorption properties, and the porous material is red brick or fly ash in construction waste .

Preferably, the base layer is an original soil layer, and a layer of geotextile is arranged between the base layer and the aquifer.

Preferably, the water collection block is a cuboid surrounded by stainless steel mesh, and the peripheral side wall of the water collection block is wrapped with a layer of geotextile.

Preferably, the hydraulic check valve is arranged at the bottom of the side wall of the inspection well, and the control drainage elevation of the hydraulic check valve is coordinated and determined by the lowest water level of the inspection well and the bottom elevation of the aquifer.

Preferably, the hydraulic check valve is a ball core valve, and the ball core of the ball core valve is a hollow circular sphere made of stainless steel.

Preferably, the water storage body can be provided with multiple sets of drainage components. When multiple sets of drainage components are provided, the drainage pipes of each set of drainage components can be respectively connected to a main pipe, and then connected to a water storage tank. The main pipe is controlled in the cistern by the hydraulic check valve of the drainage member.

The design principle of the utility model: the utility model is an underground device for rainwater regulation and storage, which fully utilizes the difference between the water level in the aquifer and the water level in the inspection well to automatically store and discharge water; after completion, no manual operation is required , without any power, automatically completes the water storage and drainage of the water storage body according to the set water level.

Water storage process:

Before water storage, the aquifer contains less water, no water or the water level is below the minimum water level. When rainfall or heavy rain strikes, the rainwater comes in from the intake, flows into the intake well, and then flows into the aquifer until the aquifer is full. When the water level in the inspection well is higher than the water level in the aquifer, the hydraulic check valve of the drainpipe connecting the aquifer and the inspection well is reversed and cannot enter water.

Drainage process:

After the rainfall, the water level in the inspection well will continue to drop with the drainage of the urban drainage network, and can be reduced to the lowest water level. When the water level in the inspection well is continuously decreasing, when the water level in the aquifer is higher than the water level in the inspection well, the ball core valve is opened under the action of the water pressure in the aquifer, and the water in the aquifer is continuously collected In the water collection block, it will flow into the inspection well along the drain pipe until it is emptied, so as to make room for the aquifer for the next rainwater regulation and storage.

Beneficial effects: the utility model is an underground device for rainwater regulation and storage. The regulation, storage and discharge of rainwater does not require power or manual operation, and it automatically stores and drains water completely according to the water level difference, and thus circulates. Under the condition that the urban green land remains unchanged, the function and scale of the green space remain unchanged, the device provides the city with a space for flood detention, thereby improving the city's flood control capacity. It can fully combine with urban green space, form a large amount and a wide area, and can reduce rainwater on the spot, and can store, discharge and utilize rainwater;

Just by properly setting the cinder or broken brick aquifer under the green belt, it can absorb 15% to 25% of the aquifer's volume of rainwater; combined with urban green space, it has a large amount and a wide area, and is fully capable of quickly absorbing water when it rains. Reduce the probability of urban flooding. The device can not only effectively reduce urban waterlogging, but also does not affect the landscape, and is integrated with greening facilities for easy implementation;

Cinder or broken bricks in the aquifer can effectively absorb phosphate ions, preventing phosphate ions from flowing into groundwater with rainwater and making groundwater eutrophic;

Most of the water storage materials buried in the water storage body are porous construction waste, which provides a new channel for the reuse of urban construction waste.

Description of drawings

Fig. 1 is a schematic plan view of the first embodiment of the utility model.

Fig. 2 is a schematic cross-sectional structure diagram along line A-A in Fig. 1 .

Fig. 3 is a schematic cross-sectional structure diagram along line B-B in Fig. 1 .

Fig. 4a is a schematic structural diagram of the working principle of the water storage process in the first embodiment of the present invention.

Fig. 4b is a schematic structural diagram of the working principle of the drainage process in the first embodiment of the present invention.

Fig. 5 is a schematic plan view of the second embodiment of the utility model.

The symbols in the figure represent: 1. Water inlet; 10. Trash rack; 2. U-shaped baffle; 3. Inlet well; 30. Trash net; 4. Planting layer; Layer outer edge; 6. Base layer; 7. Geotextile; 8. Water collection block; 9. Drainage pipe; 11. Inspection well; 12. Hydraulic check valve; 120. Ball core valve; 13. Main pipe; 14. Cistern; C. Green space retaining wall; D. Ground; E. The lowest water level in the inspection well; F. The water level in the aquifer; G. The water level in the inspection well.

detailed description

Below in conjunction with accompanying drawing the embodiment of the present utility model is described in detail: present embodiment is carried out under the premise of technical solution of the present utility model, has provided detailed embodiment and concrete operation process, but protection scope of the present utility model It is not limited to the following examples.

Example 1:

As shown in Figures 1 and 2, the underground rainwater regulation and storage device of the present utility model includes a water inlet 1, and the water inlet 1 is designed as a rectangular mouth. The position of the water outlet 1 should still be determined according to the position of the inspection well 11, and it should be close to the inspection well 11 so as to facilitate drainage and pipeline arrangement. The water inlet 1 is provided with a vertical steel bar as a trash rack 10, and the trash rack 10 is used as the first trash rack for receiving rainwater. A downward slope is designed between the water inlet 1 and the ground D, and the existence of the slope facilitates the rapid flow of rainwater from the ground into the water inlet 1 . The rainwater on the ground or road is led to the water inlet 1 through the organized slope and drainage ditch. The water inlet 1 is the interface for the surface runoff to enter the water storage body. Calculation and determination of water volume and design standards, etc. Generally, one water inlet should be installed for a water collection area of 8-30m ² , and more should be installed if conditions permit, so as to collect rainwater nearby.

A U-shaped baffle 2 is arranged between the water inlet 1 and the planting soil of the greening pool, and a cover plate is arranged on the U-shaped baffle 2 , and the cover plate is used to prevent external debris from falling into the water inlet well 3 . The height of the U-shaped baffle plate 2 is the thickness of the planting layer 4 . The U-shaped baffle 2 and the cover plate are prefabricated with conventional reinforced concrete.

A water inlet well 3 is arranged in the groove of the U-shaped baffle plate 2, and the water inlet well 3 is filled to the aquifer 5 by coarse-grained materials (such as pebbles, crushed stones, etc.). The top surface of the water inlet well 3 (that is, on the coarse-grained material) is provided with a trash-blocking net 30, and the trash-blocking net 30 carries out a second trash-blocking to the rainwater. The top surface of the water inlet well 3 is 50-100mm lower than the plane of the water inlet 1. The function of the water inlet well 3 is to lead the rainwater to the aquifer 5 as soon as possible, and to remove the sediment, etc. in the water flow before the rainwater is discharged into the water storage body. The sundries are deposited to prevent the sundries from entering the aquifer 5 .

The water storage body consists of urban green land and underground space, and is spatially divided into three layers: planting layer 4, aquifer layer 5, and basement layer 6. The shape of the green space utilized is not limited and can be in various shapes. The reduction of waterlogging in the water storage body is mainly to utilize the characteristics of the porous material in the aquifer 5 to quickly absorb and store rainwater, and to use the green space to set up the device with a large volume and a wide area, which can achieve the purpose of absorbing rainwater on the spot and avoiding concentrated runoff; The water layer 5 stores a large amount of rainwater, and gradually replenishes the rainwater to the groundwater to realize the comprehensive utilization of rainwater.

The planting layer 4 is the topmost layer of the green land, generally all higher than the ground or the road surface (usually called sinking when lower than the road surface or the ground). The thickness of the covering soil of the planting layer 4 must first meet the minimum thickness of plant growth, and its thickness is also related to the type of plant and the type of covering soil. Generally, the thickness of the covering soil should be greater than 30cm. Sufficient range should be set aside for arbors to ensure the required soil. Under the planting layer 4 is an aquifer 5, and a layer of geotextile 7 is arranged between the two layers. The effect of planting layer 4 is to provide the bed of growth for plants, meanwhile, also can absorb and store a small amount of rainwater when it rains.

The top side of the aquifer 5 is connected to the bottom of the water inlet well 3, and a water outlet is provided on the bottom side of the aquifer 5. The aquifer 5 is located under the planting layer 4 and is filled with porous materials with strong permeability and high adsorption performance, such as building brick slag, coal cinder, etc., and its size is determined by the required water storage capacity. Generally, the bottom surface of the aquifer 5 should be higher than the groundwater level, and one deck of geotextile 7 should be arranged between the four sides of the aquifer 5 and the adjacent original soil layers on the periphery. The geotextile 7 is laid after the top surface of the aquifer 5 should be flat, and the effect of the geotextile 7 is to limit the soil particles of the adjacent soil layer to flow into the aquifer 5 with water. The function of the aquifer 5 is to increase the water storage capacity and the pollutant adsorption capacity of the water storage body, but at the same time, the principle of economy and applicability should also be taken into consideration. Therefore, porous materials such as red bricks and fly ash in construction waste can be selected objects. These porous materials have strong water absorption capacity and can store a large amount of rainwater in a short period of time to achieve the effect of peak reduction and emission reduction. Porous materials have the function of adsorbing pollutants such as nitrogen and phosphorus, and prevent ground rainwater from being directly discharged into the ground and polluting groundwater. Porous materials come from a wide range of sources and are cheap. Reasonable use can achieve energy saving, emission reduction, and turning waste into treasure. The aquifer filling material should remove grass roots, plastic bags, wood chips and other sundries without adsorption capacity.

The base layer 6 can be the original soil layer, and a layer of geotextile 7 should be arranged between the base layer 6 and the aquifer 5, and the geotextile 7 is covered with coarse sand with a thickness of not less than 100 mm. When the base layer is backfill soil, it shall be backfilled with cohesive soil and compacted layer by layer.

As shown in FIGS. 1 and 3 , the drainage component includes a water collection block 8 , a drain pipe 9 , and a hydraulic check valve 12 . The water collecting block 8 is a rectangular parallelepiped surrounded by stainless steel mesh. The peripheral side wall of the water collecting block 8 is wrapped with a layer of geotextile, and the water collecting block 8 is designed as an inner hollow structure to facilitate water collection. The water collection block 8 should meet the requirements of strength and rigidity, and its size is determined by the size of the water storage body; the larger the water collection block 8, the larger the space, the more water is collected, and the faster the drainage; the water collection block 8 is arranged near the water storage At the outlet of the layer outer edge line 50, the surrounding meshes can constantly infiltrate water.

One end of the drainage pipe 9 is connected to the water collection block 8 in the aquifer 5, and the other end leads to the inspection well 11 and is connected with the hydraulic check valve 12. The hydraulic check valve 12 is arranged in the nearby inspection well 11 and fixed For the well wall of the inspection well 11. Each water storage body is provided with 1 to 3 sets of drainage components, the number and specifications of which are determined by calculation, and should be combined with nearby inspection wells 11 .

The hydraulic check valve 12 is arranged in the inspection well 11 and fixed on the bottom side wall of the inspection well 11 . The control drainage elevation of the hydraulic check valve 12 is coordinated and determined by the lowest water level E in the inspection well and the bottom elevation of the aquifer 5 . The control drainage elevation of the general hydraulic check valve 12 is the lowest water level E in the inspection well. When the bottom elevation of the aquifer 5 is relatively high, the control drainage elevation of the hydraulic check valve 12 can be higher than the lowest water level E in the inspection well.

The hydraulic check valve is a ball core valve 120, and the ball core is a hollow circular sphere made of stainless steel. The specific gravity of the spherical valve 120 is required to be slightly greater than that of water. Its function is to form a spherical seal with the funnel-shaped valve seat by its own weight and under the action of water pressure, so as to cut off the backflow of water flow in the inspection well 11. When the water level in the aquifer 5 is higher than the water level in the inspection well 11, under the action of the water pressure in the drain pipe 9, the ball core floats to drain water.

The drainage of the local underground water storage device should be combined with the municipal drainage pipe network, rivers and lakes, and discharged nearby.

As shown in Figure 4, it is a structural schematic diagram of the working principle of the water storage process and drainage process of the utility model.

Figure 4a shows the water storage process: before the water storage, the aquifer 5 contains less water, no water or the water level is below the minimum water level. When rainfall or heavy rain strikes, rainwater comes in from the water inlet, flows into the water inlet well, and then flows into the aquifer 5 until the aquifer 5 is full. When the water level G in the inspection well is higher than the water level F in the aquifer, the hydraulic check valve 12 of the drainage pipe 9 connecting the aquifer 5 and the inspection well 11 cannot enter water in the reverse direction.

Figure 4b shows the drainage process: after the rainfall, the water level G in the inspection well will continue to drop with the drainage of the urban drainage network, and can drop to the lowest water level. When the water level in the inspection well is continuously decreasing, when the water level F in the aquifer is higher than the water level G in the inspection well, the ball core valve 120 is opened under the action of the water pressure in the aquifer 5, and the water in the aquifer 5 The water is continuously collected in the water collection block 8, and then continuously flows into the inspection well 11 along the drain pipe 9 until it is emptied, so as to vacate the space of the aquifer for the next rainwater regulation and storage.

Example 2:

As shown in Figure 5, the water inlets 1 are respectively arranged on both sides of the green land. The water storage body is provided with two sets of drainage components, and the drainage pipes 9 of the two sets of drainage components are respectively connected to a main pipe 13 . The rainwater stored in the aquifer 5 is discharged to a sump 14 through the main pipe 13 for rational use. The main pipe 13 is controlled in the sump 14 by the hydraulic check valve 12 of the drainage means.

The basic principles and main features of the present utility model and the advantages of the present utility model have been shown and described above. Those skilled in the art should understand that the utility model is not limited by the above-mentioned embodiments. The above-mentioned embodiments and descriptions only illustrate the principle of the utility model. Without departing from the spirit and scope of the utility model, the utility model The new model also has various changes and improvements, and these changes and improvements all fall within the scope of the claimed utility model. The scope of protection required by the utility model is defined by the appended claims and their equivalents.

Claims (10)

1. An underground device for regulating and storing rainwater, characterized in that it comprises a water inlet, a water storage body, a drainage member, and a manhole, and the water inlet is arranged on the body of wall at the edge of the greening pool, and the water inlet and A U-shaped baffle is arranged between the planting soil of the greening pool, a cover plate is arranged above the groove of the U-shaped baffle, and a water inlet well is arranged below the groove of the U-shaped baffle, and the water storage body includes a planting layer , water storage layer, base layer, the planting layer is located at the top of the green pool, the base layer is located at the bottom of the green pool, between the planting layer and the base layer is the water storage layer, the water storage layer The peripheral side wall is covered with a layer of geotextile, the top side of the aquifer is connected to the bottom of the water inlet well, a drainage port is provided on the bottom side of the aquifer, and the drainage member includes a water collection block , a drainage pipe, a hydraulic check valve, the hydraulic check valve is arranged in the inspection well, and is fixed on the side wall of the inspection well, and the water collection block is arranged in the drainage of the aquifer At the mouth, the water collecting block can continuously infiltrate water from the aquifer, one end of the drain pipe is connected to the water collecting block, and the other end is connected to a hydraulic check valve. 2. An underground device for regulating and storing rainwater according to claim 1, characterized in that, the water inlet is designed as a rectangular opening, and the water inlet is arranged on one side or on both sides of the green space on the edge of the greening pool retaining wall. 3. The underground device for regulating and storing rainwater according to claim 1, characterized in that, the water inlet is provided with a vertical steel bar as a trash rack, and the rainwater is firstly blocked, and the A trash net is set on the top surface of the water inlet well to carry out the second trash blocking on the rainwater. 4. The underground device for regulating and storing rainwater according to claim 1, wherein the planting layer is the uppermost layer of the greening pool, and the planting layer is higher than the ground or road surface. 5. A kind of underground device for regulating and storing rainwater according to claim 1, characterized in that, the aquifer is located under the planting layer, and the aquifer is made of permeable and adsorbable It is filled with porous material, and the porous material is red brick or fly ash in construction waste. 6 . The underground device for regulating and storing rainwater according to claim 1 , wherein the base layer is an original soil layer, and a layer of geotextile is arranged between the base layer and the water storage layer. 7 . 7. A kind of underground device for adjusting and storing rainwater according to claim 1, characterized in that, the water collecting block is a cuboid surrounded by stainless steel mesh, and the peripheral side wall of the water collecting block is wrapped with a layer of geotechnical cloth. 8. An underground device for regulating and storing rainwater according to claim 1, characterized in that, the hydraulic check valve is arranged at the bottom of the side wall of the inspection well, and the hydraulic check valve controls drainage The elevation is coordinated and determined by the lowest water level of the inspection well and the bottom elevation of the aquifer. 9. A kind of underground device for adjusting and storing rainwater according to claim 1, characterized in that, the hydraulic check valve is a ball core valve, and the ball core of the ball core valve is a made of stainless steel. Hollow round sphere. 10. An underground device for regulating and storing rainwater according to claim 1, characterized in that, the water storage body can be provided with multiple sets of drainage components, and when multiple sets of drainage components are provided, each set of drainage components can be The drainage pipes are respectively connected to a main pipe, and then connected to a reservoir, and the main pipe is controlled in the reservoir by the hydraulic check valve of the drainage component.