CN108035423B - Potential energy pressurized rainwater drainage and storage system and method for sponge city - Google Patents

Abstract

The system comprises a rain water tank, a waste water tank, a first overflow pipe, a second overflow pipe, a municipal sewage pipe network, a municipal rainwater pipe network, a filter, a first electric valve, a second electric valve, a third electric valve, a first check valve, a second check valve, a fourth electric valve, a fifth electric valve, a sixth electric valve, a third check valve, a seventh electric valve, a fourth check valve, an eighth electric valve, a ninth electric valve, a fifth check valve, a sixth check valve, a tenth electric valve, a first electric regulating valve, a first piston type water storage tank, a second piston type water storage tank, an eighth check valve, a ninth check valve and a controller. The invention also comprises a potential energy pressurizing rainwater drainage and storage method for the sponge city. When the rainfall in rainy days is large and the drainage of ground rainwater is not smooth, the drainage capacity of the rainwater pipe can be improved by using the invention, and the problem of water accumulation on the ground around super high-rise or high-rise buildings can be well solved.

Description

Potential energy pressurized rainwater drainage and storage system and method for sponge city

technical field

The invention relates to a potential energy pressurized rainwater drainage and storage system and method for a sponge city.

Background technique

Sponge city is a new generation of urban stormwater management concept. It refers to the city's good "elasticity" in adapting to environmental changes and responding to natural disasters caused by rainwater. It can also be called "water elastic city". The international general term is "low-impact development stormwater system construction". When it rains, it absorbs, stores, infiltrates, and purifies water, and "releases" the stored water for use when needed.

To build a sponge city, we must first reverse the concept. Taking "slow drainage and slow release" and "storage and staggered peaks" as the main design concepts of the rainwater system, it not only avoids floods, but also effectively collects rainwater.

The rainwater bucket is located at the entrance where the roof rainwater enters the rainwater pipe from the gutter. The rainwater bucket has a rectification grille device, which can quickly drain roof rainwater. The grille has a rectification effect, avoids the formation of excessive vortices, stabilizes the water level in front of the bucket, reduces aeration, quickly drains roof rainwater and snow water, and can effectively block large sundries. The rainwater collected by the rainwater bucket enters the rainwater pipe and flows into the rainwater tank. When the rainwater stored in the rainwater tank exceeds a certain level, it is discharged through the overflow pipe.

Gravity flow refers to the rainwater flowing forward in the rainwater pipe relying on the action of gravity (slope), which is generally not full flow, which is suitable for drainage when the amount of rainwater is small; pressure flow refers to the rapid full flow of rainwater by pressurizing the rainwater The state flows, suitable for use when the amount of rain is large.

In many cities in our country, there is a problem of poor drainage of rainwater. The specific reasons can be roughly divided into the following aspects:

① Ground pollution blockage is serious. When the rainy season comes, under the influence of strong rainfall, the drainage speed of urban drainage pipes cannot meet the requirements due to the pipe diameter and other reasons. Cleaning and dredging maintenance posed great difficulties.

②The water outlet of the rainwater pipe is blocked. At present, the rainwater in most cities in my country is discharged into rivers and other water bodies nearby through rainwater pipes. However, in many cities located in plain areas, due to the constraints of the location and terrain, the water outlet is submerged, so that the location of the water outlet is lower than the water level of the water body. During the rainy season, the water level of the water body generally rises, and being supported by the water level of the water body, the water flow in the rainwater pipe slows down, resulting in a reduction in the drainage capacity of the drainage pipe. When the rainy season comes, there is a long-term waterlogging problem in low-lying areas, which affects the traffic of surrounding residents.

③ Lack of necessary connection between urban rainwater pipes. At present, the rainwater pipeline generally builds several independent drainage systems for rainwater drainage, and the drainage systems are not connected to each other. However, in the actual drainage process, due to the uncertainty of the amount of water collected by each system of the rainwater pipeline and the time of water collection, it is impossible for the peak flow of rainwater to occur at the same time during the flood season, and the drainage capacity of each drainage system is also different.

PHC pipe piles are prestressed high-strength concrete pipe piles. It adopts the pre-tensioned prestressed centrifugal forming process, and after 10 atmospheric pressure and steam curing at about 1800 ℃, it is made into a hollow cylindrical concrete prefabricated component. The standard section length is 10m, the diameter is from 300mm to 800mm, and the concrete strength level ≥C80. The PHC pipe pile bears the upper load jointly by the side resistance and the end resistance, and has strong adaptability to the geological conditions with large undulations and changes in the bearing layer, so it is suitable for a wide range of areas and various types of buildings. In large-scale buildings, PHC pipe piles are used in a large amount, and the usage of a single project often reaches hundreds or even thousands, and the depth of the pile foundation can reach tens of meters. In order to protect the lower end of the pile and the bottom seal, prevent soil from entering the pipe, prevent the pile from shifting, and effectively improve the single pile bearing capacity of the pipe pile, when the PHC pipe pile is used for pile construction, a pile tip is often installed at the end of the PHC pipe pile. There are cross-type and pointed-type pile points. In view of using the pile tip resistance and the friction between the side of the pile body and the soil to bear the superstructure load friction PHC pipe pile, the pile tip is still in the soft soil layer.

Contents of the invention

The technical problem to be solved by the present invention is to provide a method that can pressurize the rainwater with zero energy consumption when the rainfall on the rainy day is large and the drainage of the rainwater on the ground is not smooth, so that the flow state of the rainwater in the pipeline changes from not full to flowing. The potential energy pressurized rainwater drainage and storage system and method for the sponge city can be well solved by filling the flow, improving the discharge capacity of the rainwater pipe, and solving the problem of water accumulation on the ground around the super high-rise or high-rise buildings.

The technical solution adopted by the present invention to solve its technical problems is:

The potential energy pressurized rainwater drainage and storage system for sponge city of the present invention comprises a rainwater tank, a waste water tank, a first overflow pipe, a second overflow pipe, a municipal sewage pipe network, a municipal rainwater pipe network and a filter, and is also provided with The first electric valve, the second electric valve, the third electric valve, the first check valve, the second check valve, the fourth electric valve, the fifth electric valve, the sixth electric valve, the third check valve, the seventh Electric valve, fourth check valve, eighth electric valve, ninth electric valve, fifth check valve, sixth check valve, tenth electric valve, first electric regulating valve, first piston water storage tank, The second piston type water storage tank, the eighth check valve, the ninth check valve and the controller;

One end of the first electric valve is connected to the pipeline connected to the outdoor ground drain, and the other end is connected to the first check valve through the pipeline, and the first check valve is connected to the second piston type water storage through the pipeline. The right end of the tank is connected; the right end of the second piston type water storage tank is connected through the second check valve of the pipeline, and the second check valve is connected with the second electric valve through the pipeline, and the second electric valve The valve is connected to the pipeline with the third check valve at both ends through the pipeline, one of the third check valve is connected to the municipal rainwater pipe network through the pipeline, and the other third check valve is connected to the third check valve through the pipeline. Nine electric valves are connected, and the ninth electric valve is respectively connected to the left end of the second piston-type water storage tank through pipelines, and connected to the first overflow pipe connected to the rainwater tank through pipelines;

One end of the eighth electric valve is connected to the pipeline connected to the outdoor ground drain, and the other end is connected to the left end of the second piston-type water storage tank through the pipeline;

The first piston-type water storage tank is provided with a first piston plate, the second piston-type water storage tank is provided with a second piston plate, and the first piston plate is connected with the second piston plate through a connecting rod, The upper right end of the second piston type water storage tank is provided with a liquid level detector;

One end of the fourth electric valve is respectively connected to the sixth check valve and the seventh electric valve through the pipeline, and the sixth check valve is connected to the rainwater tank through the pipeline. The seventh electric valve is connected to the fifth check valve through a pipeline, the fifth check valve is connected to the right end of the first piston-type water storage tank through a pipeline, and the other end of the fourth electric valve is connected to the right end of the fourth electric valve through a pipeline. The road is connected with the fourth check valve, and the fourth check valve is connected with the left end of the first piston type water storage tank through management;

One end of the third electric valve is connected to the waste water tank through the pipeline, the other end is connected to the tenth electric valve through the pipeline, and connected to the first electric regulating valve through the pipeline, and the tenth electric valve is respectively The eighth check valve is connected through the pipeline, and the municipal sewage pipe network is connected through the pipeline. The first electric regulating valve is connected with the ninth check valve through the pipeline, and the ninth check valve passes through The pipeline is connected to the left end of the first piston-type water storage tank, the eighth check valve is respectively connected to the fifth electric valve through the pipeline, and connected to the sixth electric valve through the pipeline, and the fifth electric valve The valve is connected to the left end of the first piston-type water storage tank through a pipeline, and the sixth electric valve is connected to the right end of the first piston-type water storage tank through a pipeline;

The upper end of the waste water tank is respectively connected with the filter through the pipeline, and connected with the second overflow pipe through the pipeline, and the second overflow pipe is connected with the municipal sewage pipe network through the pipeline.

Further, a second electric regulating valve, a seventh check valve, an airtight water baffle and a PHC pile are also provided, and one end of the second electric regulating valve passes between the pipeline and the second check valve and the second electric valve. The other end of the second electric regulating valve is connected with the seventh check valve located in the PHC pile through the pipeline, and the airtight water retaining plate is installed in the PHC pile and located in the seventh check valve Below the valve, the tip of the PHC pile is provided with a seepage hole, and the tip of the PHC pile is provided with a first water pressure sensor.

Further, a liquid level sensor and a second water pressure sensor are provided in the municipal rainwater pipe network.

Further, a third water pressure sensor is provided at the right end of the second piston-type water storage tank.

Further, a first ventilation valve is provided on the upper part of the right end of the first piston-type water storage tank, and a second ventilation valve is provided on the upper part of the left end of the second piston-type water storage tank.

Further, the first piston-type water storage tank and the second piston-type water storage tank are arranged in the basement machine room.

The potential energy pressurized rainwater drainage and storage method for the sponge city of the present invention, the specific process is as follows:

Initial state: when there is no rainfall, there is no water storage in the roof rainwater tank, the first piston plate and the second piston plate are close to the left wall, all valves are closed, and the waste water tank normally collects waste water from the high area of the building. When the waste water exceeds a certain level, it is discharged from the second overflow pipe to the municipal sewage pipe network, or the third electric valve and the tenth electric valve are opened to directly discharge the waste water to the municipal sewage pipe network;

Working condition 1: When the rainfall is heavy in rainy days and the rainwater on the ground is not discharged smoothly, the first electric valve and the second electric valve are opened to let the rainwater enter the second piston water storage tank from the pipeline, and the second piston water storage tank gradually Filled with water, when the liquid level detector detects that the water level exceeds a certain value, it sends a signal to the controller, and the controller controls the opening of the third electric valve, and uses the static pressure of the high-level waste water tank to push the first piston plate and the second piston plate to the rightmost end of the piston wall, and pressurize the rainwater in the second piston-type water storage tank to discharge to the municipal rainwater pipe network; since the rainwater tank has collected rainwater at this time, open the seventh electric valve, and the first piston-type water storage tank The sewage is discharged to the municipal sewage pipe network through the fifth electric valve through the static pressure of the high-level rainwater tank;

Working condition 2: When the rainfall is heavy in rainy days and the rainwater on the ground is not discharged smoothly, the first electric valve and the second electric valve are opened to let the rainwater enter the second piston water storage tank from the pipeline, and the second piston water storage tank gradually Filled with water, when the liquid level detector detects that the water level exceeds a certain value, it sends a signal to the controller, and the controller controls the fourth electric valve to open. At this time, the high-level rainwater tank has collected rainwater. pressure, push the first piston plate and the second piston plate to the rightmost end of the piston wall, pressurize and discharge the rainwater in the second piston water storage tank to the municipal rainwater pipe network; open the seventh electric valve, use the static pressure of the rainwater tank to discharge the rainwater in the The first piston plate and the second piston plate are pushed to the leftmost end of the piston wall, and the rainwater in the first piston water storage tank is discharged, or the fifth electric valve is directly opened to discharge the rainwater in the first piston water storage tank to the municipal sewage pipe net;

Working condition 3: When there is a lot of rainfall in rainy days and the drainage of rainwater on the ground is not smooth, open the first electric valve and the second electric valve to let the rainwater enter the second piston water storage tank from the pipeline, and the second piston water storage tank gradually Filled with water, when the liquid level detector detects that the water level exceeds a certain value, it sends a signal to the controller, and the controller controls the eighth electric valve to open, and the ground rainwater enters from the left pipe of the second piston-type water storage tank, directly Push the second piston plate to the rightmost end of the piston wall, and pressurize the rainwater in the second piston type water storage tank to discharge to the municipal rainwater pipe. In this way, another part of the ground rainwater is collected, and the collected rainwater is collected by the static pressure of the ground rainwater. Rainwater discharge; the rainwater collected for the second time can be discharged to the municipal rainwater pipe network by directly opening the ninth electric valve when the rainwater discharge pressure decreases.

Further, the system used in this method is also provided with a second electric regulating valve, a seventh check valve, a sealed water baffle and a PHC pile, one end of the second electric regulating valve is connected to the second check valve and the second The pipelines between the electric valves are connected, the other end of the second electric regulating valve is connected with the seventh check valve located in the PHC pile through the pipeline, and the airtight water retaining plate is installed in the PHC pile, located in Below the seventh check valve, the tip of the PHC pile is provided with a permeation hole, and the tip of the PHC pile is provided with a first water pressure sensor;

Correspondingly, the method is provided with working condition 4: on the basis of working condition 1, working condition 2 and working condition 3, the other operating modes remain unchanged, and only the opening of the second electric control valve is changed to that of the first electric control valve. Open, the pressurized rainwater is discharged to the PHC pipe pile, and then discharged into the underground soil through infiltration.

The invention uses a piston-type water storage tank as a rainwater collection device. It aims at collecting ground rainwater and discharging it to municipal rainwater pipes under pressure when there is a lot of water on the ground in rainy days, so as to improve the discharge efficiency. The added pressure comes from high-rise waste water tanks or rainwater tank.

Compared with the prior art, the present invention has the following advantages:

(1) Use the high-level water tank of a super-high-rise or high-rise building as a power water tank, use its static pressure to push the piston to pressurize and discharge rainwater, and do not need to consume electricity to drive the water pump to achieve zero-energy pressurization of rainwater;

(2) The rainwater on the ground is discharged under pressure, so that the flow state of the rainwater in the pipe changes from a non-full flow to a full flow, and the flow of the pipe per unit time increases, which significantly improves the flow capacity of the rainwater pipe during the rainstorm and avoids excessive flow. Water accumulation on high-rise or high-rise building ground.

In addition, the present invention can utilize the depth of the pipe pile and the space in the PHC pipe pile to place a pressurized rainwater pipe, and open a permeation hole at the pile tip so that rainwater can pressurize and infiltrate into the soil to replenish groundwater.

Description of drawings

Fig. 1 is the structural representation of the embodiment of the potential energy pressurized rainwater drainage and storage system for sponge city of the present invention;

In the figure: 1. The first electric valve, 2. The second electric valve, 3. The liquid level detector, 4. The controller, 5. The third electric valve, 6. The first check valve, 7. The second check valve Valve, 8, the fourth electric valve, 9, the fifth electric valve, 10, the sixth electric valve, 11, the third check valve, 12, the seventh electric valve, 13, the fourth check valve, 14, the eighth Electric valve, 15, ninth electric valve, 16, first ventilation valve, 17, second ventilation valve, 18, fifth check valve, 19, rainwater tank, 20, waste water tank, 21, first overflow Pipe, 22, the second overflow pipe, 23, the sixth check valve, 24, the first electric regulating valve, 25, the seventh check valve, 26, the airtight water retaining plate, 27, the seepage hole, 28, the pile point , 29. PHC pile, 30. Tenth electric valve, 31. Second electric regulating valve, 32. Municipal rainwater pipe network, 33. Liquid level sensor, 34. Filter, 35. First water pressure sensor, 36. First Piston type water storage tank, 37, the first piston plate, 38, the second piston type water storage tank, 39, the second piston plate, 40, the eighth check valve, 41, the ninth check valve, 42, the second Water pressure sensor, 43, the third water pressure sensor.

Detailed ways

The present invention will be further described below in conjunction with the accompanying drawings and embodiments.

Referring to Fig. 1, the potential energy pressurized rainwater drainage and storage system for the sponge city of the present embodiment includes a rainwater tank 19, a waste water tank 20, a first overflow pipe 21, a second overflow pipe 22, municipal sewage pipe network, municipal The rainwater pipe network 32 and the filter 34 are also provided with a first electric valve 1, a second electric valve 2, a third electric valve 5, a first check valve 6, a second check valve 7, a fourth electric valve 8, a first electric valve Fifth electric valve 9, sixth electric valve 10, third check valve 11, seventh electric valve 12, fourth check valve 13, eighth electric valve 14, ninth electric valve 15, fifth check valve 18, Sixth check valve 23, tenth electric valve 30, first electric regulating valve 24, first piston type water storage tank 36, second piston type water storage tank 38, eighth check valve 40, ninth check valve 41 and controller 4;

One end of the first electric valve 1 is connected to the pipeline connected to the outdoor ground drain, and the other end is connected to the first check valve 6 through the pipeline, and the first check valve 6 is connected to the second piston through the pipeline. The right end of the piston type water storage tank 38 is connected; the right end of the second piston type water storage tank 38 is connected through the second check valve 7 of the pipeline, and the second check valve 7 is connected with the second electric valve through the pipeline respectively. 2, the second electric valve 2 is connected to the pipeline with the third check valve 11 at both ends through the pipeline, and one of the third check valves 11 is connected to the municipal rainwater pipe network 32 through the pipeline , the other third check valve 11 is connected with the ninth electric valve 15 through the pipeline, and the ninth electric valve 15 is respectively connected with the left end of the second piston type water storage tank 38 through the pipeline, and connected with the same valve through the pipeline. The first overflow pipe 21 connected to the rainwater tank 19 is connected;

One end of the eighth electric valve 14 is connected to the pipeline connected to the outdoor ground drain, and the other end is connected to the left end of the second piston type water storage tank 38 through the pipeline;

The first piston-type water storage tank 36 is provided with a first piston plate 37, and the second piston-type water storage tank 38 is provided with a second piston plate 39, and the first piston plate 37 is connected to the second piston plate through a connecting rod. The piston plates 39 are connected, and the upper right end of the second piston type water storage tank 38 is provided with a liquid level detector 3;

One end of the fourth electric valve 8 is connected to the sixth check valve 23 and the seventh electric valve 12 through the pipeline, and the sixth check valve 23 is connected to the rainwater tank 19 through the pipeline. The seventh electric valve 12 is connected to the fifth check valve 18 through a pipeline, and the fifth check valve 18 is connected to the right end of the first piston-type water storage tank 36 through a pipeline. The other end of the fourth electric valve 8 is connected with the fourth check valve 13 through the pipeline, and the fourth check valve 13 is connected with the left end of the first piston type water storage tank 36 through management;

One end of the third electric valve 5 is connected to the waste water tank 20 through a pipeline, and the other end is connected to the tenth electric valve 30 through a pipeline, and connected to the first electric regulating valve 24 through a pipeline. Ten electric valves 30 are respectively connected to the eighth check valve 40 through pipelines, and connected to the sewage pipe network through pipelines, and the first electric regulating valve 24 is connected to the ninth check valve 41 through pipelines, so The ninth check valve 41 is connected to the left end of the first piston-type water storage tank 36 through a pipeline, the eighth check valve 40 is connected to the fifth electric valve 9 through a pipeline, and connected to the fifth electric valve 9 through a pipeline. Six electric valves 10 are connected, the fifth electric valve 9 is connected to the left end of the first piston type water storage tank 36 through pipelines, and the sixth electric valve 10 is connected to the left end of the first piston type water storage tank 36 through pipelines. The right end is connected;

The upper end of the waste water tank 20 is respectively connected with the filter 34 through the pipeline, and connected with the second overflow pipe 22 through the pipeline, and the second overflow pipe 22 is connected with the municipal sewage pipe network through the pipeline.

In this embodiment, a second electric control valve 31, a seventh check valve 25, an airtight water retaining plate 26 and a PHC pile 29 are also provided; one end of the second electric control valve 31 is connected to the second check valve through a pipeline. The pipeline between the valve 7 and the second electric valve 2 is connected, and the other end of the second electric regulating valve 31 is connected with the seventh check valve 25 located in the PHC pile 29 through the pipeline, and the airtight stopper The water plate 26 is installed in the PHC pile 29, located below the seventh check valve 25, the pile tip 28 of the PHC pile 29 is provided with a permeation hole 27, and the pile tip 28 of the PHC pile 29 is provided with a first water Pressure sensor 35.

In this embodiment, the municipal rainwater pipe network 32 is provided with a liquid level sensor 33 and a second water pressure sensor 42 .

In this embodiment, a third water pressure sensor 43 is provided at the right end of the second piston type water storage tank 38 .

In this embodiment, a first ventilation valve 16 is provided on the upper right end of the first piston-type water storage tank 36 , and a second ventilation valve 17 is provided on the upper left end of the second piston-type water storage tank 38 .

In this embodiment, the first piston-type water storage tank 36 and the second piston-type water storage tank 38 are located in the basement machine room.

The potential energy pressurized rainwater storage method for the sponge city of the present embodiment, the specific process is as follows:

Initial state: when there is no rainfall, there is no water storage in the roof rainwater tank 19, the first piston plate 37 and the second piston plate 39 are close to the left wall, all valves are closed, and the waste water tank 20 normally collects waste water in the high area of the building , when the collected wastewater exceeds a certain liquid level, it is discharged from the second overflow pipe 22 to the municipal sewage pipe network, or the third electric valve 5 and the tenth electric valve 30 are opened to directly discharge the waste water to the municipal sewage pipe network;

Working condition 1: When the rainfall is large in rainy days and the rainwater on the ground is not discharged smoothly, the first electric valve 1 and the second electric valve 2 are opened to let the rainwater enter the second piston type water storage tank 38 through the pipeline, and the second piston type water storage tank The water tank 38 is gradually filled with water. When the liquid level detector 3 detects that the water level exceeds a certain value (such as when the water surface is less than 5 cm from the top plate), a signal is sent to the controller 4, and the controller 4 controls the third electric valve 5 Open, use the static pressure of the high-level waste water tank 20 to push the first piston plate 37 and the second piston plate 39 to the rightmost end of the piston wall, and discharge the rainwater of the second piston type water storage tank 38 to the municipal rainwater pipe network 32 under pressure; When the rainwater tank 19 has collected rainwater, the seventh electric valve 12 is opened, and the sewage in the first piston type water storage tank 36 utilizes the static pressure of the high-level rainwater tank 19 to be discharged to the municipal sewage pipe network through the fifth electric valve 9;

Working condition 2: When the rainfall is large in rainy days and the rainwater on the ground is not discharged smoothly, the first electric valve 1 and the second electric valve 2 are opened to let the rainwater enter the second piston type water storage tank 38 through the pipeline, and the second piston type water storage tank The water tank 38 is gradually filled with water. When the liquid level detector 3 detects that the water level exceeds a certain value, it sends a signal to the controller 4, and the controller 4 controls the opening of the fourth electric valve 8. At this time, the high-level rainwater tank 19 has collected When the rainwater arrives, use the static pressure of this part of the rainwater to push the first piston plate 37 and the second piston plate 39 to the rightmost end of the piston wall, and discharge the rainwater of the second piston type water storage tank 38 to the municipal rainwater pipe network 32 under pressure; Open the seventh electric valve 12, use the static pressure of the rainwater tank 19 to push the first piston plate 37 and the second piston plate 39 to the leftmost end of the piston wall, and discharge the rainwater in the first piston type water storage tank 36, or directly open the fifth The electric valve 9 discharges the rainwater in the first piston type water storage tank 36 to the municipal sewage pipe network;

Working condition 3: When the rainfall is large in rainy days and the rainwater on the ground is not discharged smoothly, the first electric valve 1 and the second electric valve 2 are opened to let the rainwater enter the second piston type water storage tank 38 through the pipeline, and the second piston type water storage tank The water tank 38 is gradually filled with water, and when the liquid level detector 3 detects that the water level exceeds a certain value, it sends a signal to the controller 4, and the controller 4 controls the opening of the eighth electric valve 14, and the rainwater on the ground flows from the second piston type storage tank. The pipe on the left side of the water tank 38 enters, directly pushes the second piston plate 39 to the rightmost end of the piston wall, and discharges the water (rainwater) in the second piston type water storage tank 38 to the municipal rainwater pipe network 32 under pressure, so that the collected Another part of the ground rainwater is collected, and the collected rainwater is discharged by using the static pressure of the ground rainwater; the rainwater collected for the second time can be discharged to the municipal rainwater pipe network 32 by directly opening the ninth electric valve 15 when the rainwater discharge pressure decreases;

Working condition 4: On the basis of working condition 1, working condition 2 and working condition 3, the rest of the operation mode remains unchanged, only the opening of the second electric valve 2 is changed to the opening of the first electric regulating valve 24, and the pressurized rainwater It is discharged to the PHC pipe pile, and then discharged into the underground soil through infiltration.

In the working process of the present invention, there is no need to consume electric power to drive the water pump, so as to realize zero-energy pressurization of rainwater, so that the flow state of rainwater in the pipeline changes from non-full flow to full flow, and the flow rate of the pipeline per unit time increases. Significantly improve the flow capacity of rainwater pipes during heavy rain, and avoid water accumulation on the ground of super high-rise or high-rise buildings. At the same time, due to the use of two pistons, one large and one small, when the drainage pressure is sufficient, only a small volume of sewage (rainwater) can achieve the effect of discharging a large volume of rainwater, saving the sewage (rainwater) in the high-level water tank. ), so that the water in the high water tank per unit volume can pressurize more volumes of rainwater. In this way, rainwater can be drained more efficiently.

For example: in a super high-rise building, its high-level water tank has a static pressure of 100m water column, the area ratio of the first piston plate 37 and the second piston plate 39 is 1:5, pressure = pressure * area, under a certain static pressure , the pressure ratio in the first piston-type water storage tank 36 and the second piston-type water storage tank 38 is 5:1. When the pressure loss is ignored, the pressure in the second piston-type water storage tank 38 is about 20m water column. If the pressure head in the second piston type water storage tank 38 is relatively large, when there is a problem of impact on the nearby manhole cover, a drain pipe can be set up separately to lead the rainwater to a far downstream place to be discharged, so as not to affect the nearby manhole cover. Drainage of rainwater.

Water pressure adjustment: the second electric regulating valve 31 can adjust the flow and pressure of the waste water entering the piston according to the pressure of the rainwater outlet end on the right side of the second piston plate 39 . By adjusting the flow and pressure of waste water entering the piston, the flow and pressure of rainwater can be adjusted to prevent rainwater from entering the municipal rainwater pipe network under excessive pressure when the municipal rainwater pipe 32 is full of flow. Avoid the formation of back overflow phenomenon.

The fullness of the municipal rainwater pipe network 32 and the pressure of the pressurized rainwater spray inlet can be monitored by the liquid level sensor 33 and the second hydraulic pressure sensor 42 of the pressurized rainwater spray inlet respectively. In the case of non-extreme heavy rain, the municipal rainwater pipe network 32 is not full Under the circumstances, even if the rainwater overpressure is sprayed into the municipal rainwater pipe, it will not cause the rainwater to overflow. But when the municipal rainwater pipe network 32 is full, the pressure of the pressurized rainwater sprayed into the municipal rainwater pipe network 32 should not be greater than the buried depth at the top of the pipe network, otherwise the rainwater will overflow . Therefore, the piston rainwater is pressed out of the cavity and the pressurized rainwater injection inlet is respectively equipped with a third hydraulic pressure sensor 43, and the pressure signal is fed back to the controller 4. Under the working condition of pressurized discharge into the municipal rainwater pipeline, the controller 4 The preset program controls the second electric regulating valve 31 .

The second electric regulating valve 31 can adjust the pressure and flow of rainwater entering the PHC pipe pile according to the water pressure value of the lower part of the PHC pipe pile, so as to prevent the overpressure of rainwater from spraying out from the pile head to form a cavity at the pile head and affect the bearing capacity of the pile head. In the recharging state, the water pressure measured by the third water pressure sensor 43 in the rainwater recharging chamber of the piston and the first water pressure sensor 35 in the rainwater recharging chamber at the lower part of the PHC pipe pile is fed back to the controller 4, and then the controller 4 Control the action and opening of the second electric regulating valve 31 and the first electric regulating valve 24, so that the pressurization and refilling pressure is within a reasonable range.

Claims (5)

1. Potential energy pressurized rainwater drainage and storage system for sponge city, comprising a rainwater tank, a wastewater tank, a first overflow pipe, a second overflow pipe, a municipal sewage pipe network, a municipal rainwater pipe network and a filter, and is characterized in that: the device is also provided with a first electric valve, a second electric valve, a third electric valve, a first check valve, a second check valve, a fourth electric valve, a fifth electric valve, a sixth electric valve, a third check valve, a seventh electric valve, a fourth check valve, an eighth electric valve, a ninth electric valve, a fifth check valve, a sixth check valve, a tenth electric valve, a first electric regulating valve, a first piston type water storage tank, a second piston type water storage tank, an eighth check valve, a ninth check valve and a controller;

one end of the first electric valve is connected with a pipeline connected with an outdoor ground water outlet, the other end of the first electric valve is connected with a first check valve through a pipeline, and the first check valve is connected with the right end of the second piston type water storage tank through a pipeline; the right end of the second piston type water storage tank is connected with a second electric valve through a pipeline, the second electric valve is connected with pipelines with third check valves at two ends through pipelines, one of the third check valves is connected with a municipal rainwater pipe network through a pipeline, the other third check valve is connected with a ninth electric valve through a pipeline, and the ninth electric valve is connected with the left end of the second piston type water storage tank through a pipeline and a first overflow pipe connected with a rainwater tank through a pipeline;

one end of the eighth electric valve is connected with a pipeline connected with an outdoor ground water outlet, and the other end of the eighth electric valve is connected with the left end of the second piston type water storage tank through a pipeline;

the first piston type water storage tank is internally provided with a first piston plate, the second piston type water storage tank is provided with a second piston plate, the first piston plate is connected with the second piston plate through a connecting rod, and the upper part of the right end of the second piston type water storage tank is provided with a liquid level detector;

one end of the fourth electric valve is connected with a sixth check valve through a pipeline and a seventh electric valve through a pipeline, the sixth check valve is connected with the rain water tank through a pipeline, the seventh electric valve is connected with a fifth check valve through a pipeline, the fifth check valve is connected with the right end of the first piston type water storage tank through a pipeline, the other end of the fourth electric valve is connected with a fourth check valve through a pipeline, and the fourth check valve is connected with the left end of the first piston type water storage tank through management;

one end of the third electric valve is connected with the wastewater tank through a pipeline, the other end of the third electric valve is connected with a tenth electric valve through a pipeline and is connected with a first electric regulating valve through a pipeline, the tenth electric valve is connected with an eighth check valve through a pipeline and is connected with a municipal wastewater pipe network through a pipeline, the first electric regulating valve is connected with a ninth check valve through a pipeline, the ninth check valve is connected with the left end of the first piston type water storage tank through a pipeline, the eighth check valve is connected with a fifth electric valve through a pipeline and is connected with a sixth electric valve through a pipeline, the fifth electric valve is connected with the left end of the first piston type water storage tank through a pipeline, and the sixth electric valve is connected with the right end of the first piston type water storage tank through a pipeline;

the upper end of the waste water tank is connected with the filter through a pipeline respectively and connected with a second overflow pipe through a pipeline, and the second overflow pipe is connected with a municipal sewage pipe network through a pipeline;

the PHC pile is characterized by further comprising a second electric regulating valve, a seventh check valve, a sealing water baffle and a PHC pile, wherein one end of the second electric regulating valve is connected with a pipeline between the second check valve and the second electric valve through a pipeline, the other end of the second electric regulating valve is connected with the seventh check valve positioned in the PHC pile through a pipeline, the sealing water baffle is installed in the PHC pile and positioned below the seventh check valve, a penetrating hole is formed in the pile tip of the PHC pile, and a first water pressure sensor is arranged in the pile tip of the PHC pile;

a liquid level sensor and a second water pressure sensor are arranged in the municipal rainwater pipe network;

and a third water pressure sensor is arranged at the right end of the second piston type water storage tank.

2. The potential energy pressurized stormwater drainage system for sponge city as claimed in claim 1, wherein: the upper part of the right end of the first piston type water storage tank is provided with a first scavenging valve, and the upper part of the left end of the second piston type water storage tank is provided with a second scavenging valve.

3. The potential energy pressurized stormwater drainage system for sponge city as claimed in claim 1 or 2, wherein: the first piston type water storage tank and the second piston type water storage tank are arranged in the basement machine room.

4. A method for pressurized rainwater drainage by using potential energy of the system of claim 1 for sponge cities, which is characterized by comprising the following specific steps:

initial state: when the rainfall does not occur, no water is stored in the roof rain water tank, the first piston plate and the second piston plate are clung to the left wall surface, all valves are in a closed state, the waste water tank normally collects waste water in a high area of a building, and when the collected waste water exceeds a certain liquid level, the waste water is discharged from the second overflow pipe to a municipal sewage pipe network, or a third electric valve and a tenth electric valve are opened to directly discharge the waste water to the municipal sewage pipe network;

working condition one: when the rainfall in the rainy days is large and the drainage of the ground rainwater is not smooth, the first electric valve and the second electric valve are opened, so that the rainwater enters the second piston type Chu Shuiguan through the pipeline, the second piston type water storage tank is gradually filled with water, when the liquid level detector detects that the water level exceeds a certain specified value, a signal is sent to the controller, the controller controls the third electric valve to be opened, the static pressure of the high-level waste water tank is utilized to push the first piston plate and the second piston plate to the rightmost end of the piston wall, and the rainwater of the second piston type water storage tank is pressurized and drained to a municipal rainwater pipe network; because the rainwater tank collects rainwater at the moment, the seventh electric valve is opened, and the sewage in the first piston type water storage tank is discharged to a municipal sewage pipe network through the fifth electric valve by utilizing the static pressure of the high-level rainwater tank;

working condition II: when the rainfall in the rainy days is large and the drainage of the ground rainwater is not smooth, the first electric valve and the second electric valve are opened, so that the rainwater enters the second piston type Chu Shuiguan through the pipeline, the second piston type water storage tank is gradually filled with water, when the liquid level detector detects that the water level exceeds a certain specified value, a signal is sent to the controller, the controller controls the fourth electric valve to be opened, the high-level rainwater tank collects the rainwater at the moment, the static pressure of the rainwater is utilized to push the first piston plate and the second piston plate to the rightmost end of the piston wall, and the rainwater of the second piston type water storage tank is pressurized and drained to a municipal rainwater pipe network; opening a seventh electric valve, pushing the first piston plate and the second piston plate to the leftmost end of the piston wall by utilizing the static pressure of the rainwater tank, and discharging rainwater in the first piston type water storage tank, or directly opening the fifth electric valve to discharge the rainwater in the first piston type water storage tank to a municipal sewage pipe network;

and (3) working condition III: when the rainfall is large in rainy days and the drainage of the ground rainwater is not smooth, the first electric valve and the second electric valve are opened, so that rainwater enters the second piston type Chu Shuiguan through the pipeline, the second piston type water storage tank is gradually filled with water, when the liquid level detector detects that the water level exceeds a certain specified value, a signal is sent to the controller, the controller controls the eighth electric valve to be opened, the ground rainwater enters from the pipeline at the left side of the second piston type water storage tank, the second piston plate is directly pushed to the rightmost end of the piston wall, the rainwater of the second piston type water storage tank is pressurized and drained to a municipal rainwater pipe network, and therefore, the other part of ground rainwater is collected, and the collected rainwater is drained by utilizing the static pressure of the ground rainwater; the second collected rainwater can directly open the ninth electric valve to drain to the municipal rainwater pipe network when the rainwater discharge pressure is reduced.

5. The potential energy pressurized rainwater drainage and accumulation method for the sponge city according to claim 4, wherein the system used by the method is further provided with a second electric regulating valve, a seventh check valve, a sealing water baffle and a PHC pile, one end of the second electric regulating valve is connected with a pipeline between the second check valve and the second electric valve through a pipeline, the other end of the second electric regulating valve is connected with the seventh check valve positioned in the PHC pile through a pipeline, the sealing water baffle is installed in the PHC pile and positioned below the seventh check valve, a penetration hole is formed in the pile tip of the PHC pile, and a first water pressure sensor is arranged in the pile tip of the PHC pile;

correspondingly, the method is provided with a working condition IV: on the basis of the first working condition, the second working condition and the third working condition, other operation modes are unchanged, the opening of the second electric valve is changed into the opening of the first electric regulating valve, and the pressurized rainwater is discharged to the PHC pipe pile, so that the pressurized rainwater is discharged to underground soil through the osmosis.

Images