CN114892754A - Sponge city system and building method thereof - Google Patents

Abstract

The invention discloses a sponge city system and a construction method thereof, comprising: a first water collecting tank, a slotted baffle is fixedly installed on the top of the first water collecting tank, and one side of the outer wall of the slotted baffle is respectively provided with Waste residue treatment mechanism, water flow pressurization mechanism and ground water supply mechanism. The waste residue water supply mechanism includes a loading cylinder. The system equipment adopts the method of distributed rainwater treatment, and the mixed water source entering the equipment is heated at high temperature to improve the molecular activity of bacteria. At the same time, the driving components are used to accelerate the decomposition of the molecular structure, so that the acid and alkali substances are gradually degraded, and the generated residual solids are quickly filtered, and then stored in the second water collecting tank for humidification in other areas of the city, effectively solving the problem that the existing equipment can only use water source The problem of sterilization treatment before rainwater collection can not be carried out, so as to avoid the pollution of the stored water source and the formation of polluted precipitation after the water source evaporates again.

Description

A sponge city system and its construction method

technical field

The invention relates to the field of sponge cities, and more particularly, to a sponge city system and a construction method thereof.

Background technique

Sponge city is a new generation of urban stormwater management concept. It means that the city can be like a sponge and has good flexibility in adapting to environmental changes and responding to natural disasters caused by rainwater. It can also be called a "water elastic city". The international term is "low-impact development of rainwater system construction", which absorbs, stores, seeps and purifies water when it rains, and releases and utilizes the stored water when needed, so as to realize the free migration of rainwater in the city, and the free movement of rainwater from the ecosystem. Starting from services, building water ecological infrastructure across scales and combining various types of specific technologies to build water ecological infrastructure is the core of sponge city. Under the new situation, sponge city is to promote green building construction, low-carbon city development, and smart city. The innovative performance formed is the organic combination of modern green new technology and social, environmental, humanistic and other factors. The material application of "sponge city" material shows excellent water seepage, compression resistance, wear resistance, anti-skid and environmental protection and beauty. Colorful, comfortable and easy to maintain, sound absorption and noise reduction, etc., it has become a "breathing" urban landscape pavement, and it also effectively alleviates the urban heat island effect, so that the urban pavement no longer heats up.

With the development of science and technology, people can control water resources more effectively and make full use of it in the urban infrastructure, and then put forward the concept of sponge city, which can store the water that falls on rainy days in a way for other areas to carry out use.

However, in the existing urban system, there are a large number of harmful substances and trace elements such as strong acids and alkalis in the urban environment. When they are combined with water and reused, they will evaporate into the atmospheric environment, causing the hidden danger of polluting precipitation in a certain area.

SUMMARY OF THE INVENTION

The technical problem to be solved by the present invention is that the existing system equipment cannot handle the harmful impurities mixed in the rainwater, resulting in the problem of polluted precipitation in a local area when the polluted water source evaporates again. In order to overcome the defects of the prior art, the present invention proposes a sponge city system and a construction method thereof, which can avoid the formation of polluted precipitation after the re-evaporation of the water source due to the large pollution of the stored water source.

For this purpose, the present invention adopts the following technical solutions:

The present invention provides a sponge city system, comprising: a first water collecting tank, a slotted baffle is fixedly installed on the top of the first water collecting tank, and a waste residue treatment mechanism, a Water pressurization mechanism and surface water supply mechanism;

The waste residue water supply mechanism includes a loading cylinder, the bottom of the inner wall of the loading cylinder is fixedly installed with a metal mounting frame, the inner surface wall of the metal mounting frame is fixedly inserted with a servo motor, and the inner surface wall of the first water collecting tank is fixed Three inscribed rings are installed, and a set of support rods are fixedly inserted into the inner surface wall of each of the three inscribed rings, and an inner bladder is fixedly sleeved between the outer walls of the three sets of the support rods. The output end of the servo motor is fixedly installed with a transmission rod. The top of the transmission rod penetrates the bottom of the inner tank and is located inside the inner tank. There are a plurality of extension rods, and the top of each of the plurality of extension rods is welded with a stirring rod, and a set of installation ring grooves are opened in the interior of the three inscribed rings, and each of the three sets of the installation ring grooves is A heating rod is fixedly installed between the three inner surface walls.

In a preferred technical solution of the present invention, the water flow pressurization mechanism includes a pressurized box, and slideways are fixedly installed on both sides of the inner wall of the pressurized box, and the inner surface walls of the two slideways are movable between the inner surfaces of the two slideways. A filter plate is inserted.

In a preferred technical solution of the present invention, a connecting plate is fixedly installed at the bottom of the inner wall of the pressurized box, and a connecting ring is fixedly installed inside the connecting plate, and a water pump is fixedly inserted into the inner surface wall of the connecting ring, so A partition plate is fixedly installed between two sides of the inner wall of the pressurized box, and the partition plate divides the interior of the pressurized box into two regions.

In a preferred technical solution of the present invention, the output end of the water pump penetrates one side of the outer wall of the partition plate and communicates with one of the regions. The output end of the water pump is fixedly connected with a third water channel.

In a preferred technical solution of the present invention, the water supply mechanism includes a second water collecting tank, a top cover is provided on the top of the second water collecting tank, and a plurality of circular holes are opened on the top of the top cover, and a plurality of the Each of the circular holes has an equal diameter value.

In a preferred technical solution of the present invention, spray guns are fixedly installed on the inner surface walls of the plurality of circular holes, and a water passage is fixedly connected to the input end of each of the plurality of spray guns.

In a preferred technical solution of the present invention, a groove is formed on the top of the loading cylinder, a metal rod is fixedly inserted between two sides of the inner wall of the groove, and the outer wall of the metal rod is movably sleeved with a U. The outer wall of the U-shaped frame is fixedly installed with a sealing cover.

In a preferred technical solution of the present invention, a first water transport pipe is fixedly connected to one side of the outer wall of the slotted baffle plate, and the water outlet end of the first water transport pipe penetrates the outer wall of the loading cylinder and the inner tank, and It is communicated with the interior of the inner tank, the water inlet end of the second water transport channel runs through the outer wall of the loading cylinder and the inner bladder, and is communicated with the interior of the loading cylinder, and the water outlet end of the third water transport channel is connected to the second collector. One side of the outer wall of the water tank is communicated.

A method for building a sponge city system, comprising the following steps:

Step 1: First, bury the first water collecting tank, the loading drum, the pressurizing tank and the second water collecting tank into the ground, wherein the tops of the first water collecting tank, the loading drum and the second water collecting tank are exposed on the ground, and the first A slotted baffle at the top of the collecting tank is placed downstream of the rainwater flow.

Step 2: When the rainwater flows into the first water collecting tank through the slot on the slotted baffle, due to the increase of the liquid volume, the first water transport pipeline has a higher pressure and impacts into the inner tank. The rainwater entering the liner is doped with solid impurities and harmful bacteria. The heating element in the mechanism improves the molecular activity of harmful bacteria, and at the same time, the strong acid and alkali substances are rapidly decomposed under the influence of high temperature. At the same time, the transmission parts in the mechanism are used. , to stir the rainwater to speed up the reaction efficiency.

Step 3: After processing for a period of time, use the water pump in the pressurized tank to increase the negative pressure in half of the area, first enter the pressurized tank by the second water channel, filter the residue, and return it in a small amount of liquid. down, enter the inner tank again through the second water channel, and deposit at the bottom of the inner tank

Step 4: When a certain amount of foreign matter is deposited in the inner tank, use the movable connection between the metal rod and the U-shaped frame to open the sealing cover on the top of the loading cylinder and clean the residue inside the inner tank.

In the preferred technical solution of the present invention, in the third step: when the treated rainwater is pumped, it quickly enters the third waterway, and the third waterway transports the rainwater to the second collector. In the water tank, because the top of the second water collecting tank is infinitely close to the surface soil, when the area needs to be humidified, the spray gun in the round hole will generate a high compression capacity, and the water pipe will first store it in the second water collecting tank. The rainwater is introduced into the spray gun, and then sprayed into the soil by the nozzle of the spray gun. Under the continuous impregnation of the water source, the area can quickly maintain a humid environment.

The beneficial effects of the present invention are:

1. The present invention transports the mixed water source into the inner tank through the first water transport pipeline. At this time, the servo motor and the heating rod in the metal mounting frame are started. As time increases, the heating rod will continue to release heat, and the metal will be used to It heats the mixed water source in the inner tank. At the same time, the servo motor drives the turntable on the transmission rod to rotate, and the stirring rod on the extension rod continuously accelerates and stirs the water source. In the treatment method, the mixed water source entering the equipment is heated at high temperature to improve the molecular activity of bacteria, and at the same time, the driving components are used to accelerate the decomposition of the molecular structure, so that the acid and alkali substances are gradually degraded, and the generated residual solids are quickly filtered, and then stored until the first stage. The secondary water tank is used for humidification in other areas of the city, which effectively solves the problem that the existing equipment can only store the water source and reverse the water source later, but cannot sterilize the rainwater before it is collected. The polluted precipitation is formed after the water source evaporates again.

2. In the present invention, by starting the water pump in the connecting ring, the negative pressure in the half area of the pressurized tank increases continuously, and acts on the second water channel to pump the liquid in the inner tank. When the water source enters the pressurized tank, the first It is filtered by the filter plate in the slideway, and then transported by the third waterway into the second water collecting tank, and the water flow pressurization mechanism is set up, and the strong negative pressure generated by the driving part is used to quickly extract the treated water source. , In this process, the solid impurities doped in the water source are quickly removed to avoid the continuous accumulation of solid impurities, causing blockage between pipes, and further improving the quality of rainwater after treatment.

3. The present invention quickly enters the water source into the third water channel by the pumping, and the rainwater is transported to the second water collecting tank by the third water channel. Because the top of the second water collecting tank is infinitely close to the surface soil, when the When the area needs to be humidified, the spray gun in the round hole will generate a high compression capacity inside, and the rainwater stored in the second water collecting tank will be first introduced into the spray gun by the water pipe, and then sprayed into the soil by the nozzle of the spray gun. Under the continuous impregnation of the water source, the humid environment is quickly maintained in the area, and the overall use efficiency of the equipment is improved.

Description of drawings

1 is a perspective view of the front structure in a sponge city system of the present invention and a construction method thereof;

Fig. 2 is a side view structural perspective view of a sponge city system and a construction method thereof according to the present invention;

Fig. 3 is a rear view structure perspective view of a sponge city system and a construction method thereof according to the present invention;

FIG. 4 is a perspective view of a top-down structure in a sponge city system and a construction method thereof according to the present invention;

5 is an enlarged perspective view of a part of the structure of a sponge city system and its construction method according to the present invention;

Figure 6 is an enlarged perspective view of the structure at A in Figure 2;

7 is an enlarged perspective view of the structure at B in FIG. 1;

FIG. 8 is an enlarged perspective view of the structure at C in FIG. 1 .

In the picture:

1- The first water collecting tank; 2- Slotted baffle plate; 3- The first water pipe; 401- Loading cylinder; 402- Metal mounting bracket; 403- Servo motor; -Inner tank; 407-drive rod; 408-turntable; 409-extension rod; 410-stirring rod; 411-installation ring groove; 412-heating rod; 501-pressurized box; 502-slide; 504-connecting plate; 505-connecting ring; 506-water pump; 507-partition plate; 601-second collecting tank; 602-top cover; 603-round hole; 604-spray gun; 605-water pipe; 7-groove; 8-metal rod; 9-U-shaped frame; 10-sealing cover; 11-second waterway; 12-third waterway.

Detailed ways

The technical solutions of the present invention are further described below with reference to the accompanying drawings and through specific embodiments.

As shown in Figures 1-8, the present invention provides a technical solution: a sponge city system, comprising: a first water collecting tank 1, a slotted baffle 2 is fixedly installed on the top of the first water collecting tank 1, and the slotted baffle One side of the outer wall of 2 is respectively provided with a waste residue treatment mechanism, a water flow booster mechanism and a ground water supply mechanism.

As shown in FIGS. 1-4 and 6-7, the waste residue water supply mechanism includes a loading cylinder 401, a metal mounting frame 402 is fixedly installed at the bottom of the inner wall of the loading cylinder 401, and a servo motor 403 is fixedly inserted into the inner surface wall of the metal mounting frame 402. , the inner surface wall of the first water collecting tank 1 is fixedly installed with three inscribed rings 404, and the inner surface wall of each of the three inscribed rings 404 is fixedly inserted with a group of support rods 405, and the outer walls of the three groups of support rods 405 are fixedly inserted. An inner tank 406 is fixedly sleeved between them, and a transmission rod 407 is fixedly installed at the output end of the servo motor 403. The top of the transmission rod 407 penetrates the bottom of the inner tank 406 and is located inside the inner tank 406. The outer wall of the transmission rod 407 is fixed A turntable 408 is sleeved, a plurality of extension rods 409 are fixedly inserted inside the turntable 408, and a stirring rod 410 is welded to the top of each of the plurality of extension rods 409, and a set of installations are opened inside the three inscribed rings 404. Ring groove 411, the three sets of installation ring groove 411 are fixedly installed with heating rods 412 between the inner surface walls of each three. The system equipment adopts the method of distributed rainwater treatment, and the mixed water source entering the equipment enters the high temperature heating, Improve the molecular activity of bacteria, at the same time use the driving components to accelerate the decomposition of the molecular structure, so that the acid and alkali substances are gradually degraded, and the generated residual solids are quickly filtered, and then stored in the second water gathering tank 601 for humidification in other areas of the city, effectively solving the current problem. There is a problem that the equipment can only store the water source and reverse the water source later, but cannot sterilize the rainwater before it is collected, so as to avoid the pollution of the stored water source and the formation of polluting precipitation after the water source evaporates again.

As shown in FIGS. 1-4 , the water flow pressurization mechanism includes a pressurization box 501 , slideways 502 are fixedly installed on both sides of the inner wall of the pressurization box 501 , and a filter is movably inserted between the inner walls of the two slideways 502 Plate 503, a connecting plate 504 is fixedly installed at the bottom of the inner wall of the pressurizing box 501, and a connecting ring 505 is fixedly installed inside the connecting plate 504. The inner surface wall of the connecting ring 505 is fixedly inserted with a water pump 506, and both sides of the inner wall of the pressurizing box 501 are fixedly inserted. A partition 507 is fixedly installed therebetween. The partition 507 divides the interior of the pressurized box 501 into two regions. The output end of the water pump 506 penetrates one side of the outer wall of the partition 507 and communicates with one of the regions. One side of the outer wall of 501 is fixedly connected with the second water transport channel 11, and the output end of the water pump 506 is fixedly connected with the third water transport channel 12. By setting the water flow pressurization mechanism, the strong negative pressure generated by the driving component is used to quickly transfer the processed water. The water source is extracted, and the solid impurities mixed in the water source are quickly removed in this process to avoid the continuous accumulation of solid impurities and cause blockage between pipes, and at the same time further improve the quality of rainwater after treatment.

1-5, the water supply mechanism includes a second water collecting tank 601, a top cover 602 is provided on the top of the second water collecting tank 601, a plurality of circular holes 603 are opened on the top of the top cover 602, and each of the plurality of circular holes 603 is The diameters of each of them are equal, and the inner wall of the plurality of circular holes 603 is fixedly installed with a spray gun 604, and the input end of each of the plurality of spray guns 604 is fixedly connected with a water pipe 605. By providing a water supply mechanism, the storage can be quickly The water source is sprayed into the use area to improve the overall use efficiency of the equipment.

As shown in FIGS. 1-4 and 8 , a groove 7 is formed on the top of the loading cylinder 401 , a metal rod 8 is fixedly inserted between both sides of the inner wall of the groove 7 , and the outer wall of the metal rod 8 is movably sleeved with a U The outer wall of the frame 9 and the U-shaped frame 9 is fixedly installed with a sealing cover 10. When it is necessary to clean the impurities in the inner tank 406, the movable connection between the metal rod 8 and the U-shaped frame 9 is used to open the sealing cover. 10 will do.

As shown in FIG. 8 , one side of the outer wall of 1-4 is fixedly connected with the first water transport pipe 3 , and the water outlet end of the first water transport pipe 3 penetrates the outer wall of the loading cylinder 401 and the inner tank 406 , and is connected with the outer wall of the inner tank 406 . Internally communicated, the water inlet end of the second water transport channel 11 penetrates the outer wall of the loading cylinder 401 and the inner tank 406, and communicates with the interior of the loading cylinder 401, and the water outlet end of the third water transport channel 12 and the second water collecting tank 601 are connected. One side of the outer wall is connected. Through the connection between the first water transportation pipeline 3, the second water transportation channel 11 and the third water transportation channel 12, multiple treatment mechanisms can be effectively formed into a whole, and the purification of the mixed water source by the equipment can be improved. Effect.

The effect achieved by the whole mechanism is: when each mechanism component is buried in different depths of the stratum according to the different functions of use, when it rains, it will first fall to the surface, and the impurities and bacteria will be mixed into the rainwater. The slot hole of the slotted baffle 2 is initially stored in the first water collecting tank 1. Under the pressure of the water volume, the mixed water source is transported into the inner tank 406 by the first water transport pipeline 3, and the metal installation is started at this time. The servo motor 403 and the heating rod 412 in the frame 402, with the increase of time, the heating rod 412 will continue to release heat, using the heat conduction of the metal to heat the mixed water source in the inner tank 406, while the servo motor 403 in the process of rotating, Drive the turntable 408 on the transmission rod 407 to rotate, and make the stirring rod 410 on the extension rod 409 continue to accelerate and stir the water source. The medium negative pressure increases continuously, and acts on the second water channel 11 to pump the liquid in the inner tank 406. When the water source enters the pressurized tank 501, it is first filtered by the filter plate 503 in the slideway 502, and then filtered by the first water source. The transportation of the three transport water channels 12 is introduced into the second water collecting tank 601. When the formation on the top of the second water collecting tank 601 needs to be humidified, the adsorption force generated in the spray gun 604 is used to transport the second collecting tank 605. The water source in the water tank 601 moves to the spray gun 604, is compressed at the spray head of the spray gun 604, and is sprayed into the formation.

The present invention also provides a method for building a sponge city system, comprising the following steps:

Step 1: First, bury the first water collecting tank 1, the loading drum 401, the pressurized tank 501 and the second water collecting tank 601 into the formation, wherein the tops of the first water collecting tank 1, the loading drum 401 and the second water collecting tank 601 are exposed on the ground. on the ground surface and place the slotted baffle 2 on top of the first collecting tank 1 downstream of the rainwater flow.

Step 2: When the rainwater flows into the first water collecting tank 1 through the grooves on the slotted baffle plate 2, due to the increase of the liquid volume, the first water transport pipeline 3 has a high pressure and impacts into the inside. In the gallbladder 406, the rainwater entering the inner gallbladder 406 is doped with solid impurities and harmful bacteria. Through the heating element in the mechanism, the molecular activity of the harmful bacteria is improved, and the strong acid and alkali substances are rapidly decomposed under the influence of high temperature. The transmission parts in the mechanism stir the rainwater to speed up the reaction efficiency.

Step 3: After processing for a period of time, use the water pump 506 in the pressurized tank 501 to increase the negative pressure in half of the area, first enter the pressurized tank 501 by the transportation of the second water channel 11, filter the residue, and Under the backflow of a small amount of liquid, it enters the inner tank 406 again through the second water channel 11 and is deposited at the bottom of the inner tank 406

Step 4: When a certain amount of foreign matter is deposited in the inner tank 406, use the movable connection between the metal rod 8 and the U-shaped frame 9 to open the sealing cover 10 on the top of the loading cylinder 401, and clean the residue inside the inner tank 406 That's it.

The construction method of the entire sponge city system is roughly the same as that of the above-mentioned sponge city system. The main difference is that when the treated rainwater is pumped by the water pump 506, it quickly enters the third waterway 12, The rainwater is transported to the second water collecting tank 601 by the third water transport channel 12. Since the top of the second water collecting tank 601 is infinitely close to the surface soil, when the area needs to be humidified, the spray gun 604 in the circular hole 603 will produce a relatively small amount of air inside. High compressibility, and the rainwater stored in the second water collecting tank 601 is first introduced into the spray gun 604 by the water pipe 605, and then sprayed into the soil by the spray head of the spray gun 604. humid environment.

Other technologies in this embodiment adopt existing technologies.

The present invention has been described in terms of preferred embodiments, and those skilled in the art will appreciate that various changes or equivalent substitutions may be made to these features and embodiments without departing from the spirit and scope of the present invention. The present invention is not limited by the specific embodiments disclosed herein, and other embodiments falling within the claims of the present application all belong to the protection scope of the present invention.

Claims (10)

1. A sponge city system, characterized in that: comprising: a first water collecting tank (1), a slotted baffle plate (2) is fixedly installed on the top of the first water collecting tank (1), and the slotted baffle plate (2) One side of the outer wall is respectively provided with a waste residue treatment mechanism, a water flow booster mechanism and a ground water supply mechanism; The waste residue water supply mechanism includes a loading cylinder (401), a metal mounting bracket (402) is fixedly installed at the bottom of the inner wall of the loading cylinder (401), and a servo motor is fixedly inserted into the inner surface wall of the metal mounting bracket (402). (403), three inscribed rings (404) are fixedly installed on the inner surface wall of the first water collecting tank (1), and each inner surface wall of the three inscribed rings (404) is fixedly inserted with a A set of support rods (405), an inner tank (406) is fixedly sleeved between the outer walls of the three groups of the support rods (405), and a transmission rod (407) is fixedly installed at the output end of the servo motor (403), The top of the transmission rod (407) penetrates through the bottom of the inner container (406) and is located inside the inner container (406). The outer wall of the transmission rod (407) is fixedly sleeved with a turntable (408). A plurality of extension rods (409) are fixedly inserted in the interior of the (408), the top of each of the plurality of extension rods (409) is welded with a stirring rod (410), and the three inscribed rings (404) A set of installation ring grooves (411) are opened in the interior of each of the three sets of said installation ring grooves (411), and heating rods (412) are fixedly installed between the inner surface walls of each of the three sets of said installation ring grooves (411). 2. The sponge city system according to claim 1, characterized in that: the water flow pressurization mechanism comprises a pressurization box (501), and slideways ( 502), a filter plate (503) is movably inserted between the inner surface walls of the two slideways (502). 3. The sponge city system according to claim 2, characterized in that: a connecting plate (504) is fixedly installed at the bottom of the inner wall of the pressurized box (501), and a connecting plate (504) is fixedly installed inside the connecting plate (504). A water pump (506) is fixedly inserted into the inner surface wall of the connecting ring (505) of the ring (505), and a partition plate (507) is fixedly installed between two sides of the inner wall of the pressurizing box (501). A plate (507) divides the interior of the pressurized box (501) into two areas. 4. The sponge city system according to claim 3, characterized in that: the output end of the water pump (506) penetrates one side of the outer wall of the partition plate (507) and communicates with one of the areas, and the pressurized tank One side of the outer wall of (501) is fixedly connected with the second water transport channel (11), and the output end of the water pump (506) is fixedly connected with the third water transport channel (12). 5. The sponge city system according to claim 4, wherein the water supply mechanism comprises a second water collecting tank (601), and a top cover (602) is provided on the top of the second water collecting tank (601), so that the The top of the top cover (602) is provided with a plurality of circular holes (603), and each of the plurality of circular holes (603) has the same diameter value. 6. The sponge city system according to claim 5, characterized in that: spray guns (604) are fixedly installed on the inner surface walls of the plurality of circular holes (603), and each of the plurality of spray guns (604) is The input ends of the water pipes (605) are fixedly connected to each other. 7. The sponge city system according to claim 1, characterized in that: a groove (7) is opened on the top of the loading cylinder (401), and a groove (7) is fixedly inserted between both sides of the inner wall of the groove (7). There is a metal rod (8), a U-shaped frame (9) is movably sleeved on the outer wall of the metal rod (8), and a sealing cover (10) is fixedly installed on the outer wall of the U-shaped frame (9). 8. The sponge city system according to claim 5, characterized in that: a first water transportation pipeline (3) is fixedly connected to one side of the outer wall of the slotted baffle plate (2), and the first water transportation pipeline ( 3) The water outlet end runs through the outer wall of the loading cylinder (401) and the inner bladder (406), and communicates with the interior of the inner bladder (406), and the water inlet end of the second water channel (11) runs through the loading cylinder (406). 401) and the outer wall of the inner tank (406), and communicate with the interior of the loading cylinder (401), and the outlet end of the third water channel (12) communicates with the outer wall side of the second water collecting tank (601) . 9. A method of building a sponge city system, characterized in that: comprising the following steps: S1: First, bury the first water collecting tank (1), the loading drum (401), the pressurizing tank (501) and the second water collecting tank (601) into the formation, wherein the first water collecting tank (1), the loading drum (401) ) and the top of the second collecting tank (601) are exposed on the ground, and the slotted baffle plate (2) on the top of the first collecting tank (1) is placed downstream of the rainwater flow; S2: When the rainwater flows into the first water collecting tank (1) through the slot on the slotted baffle plate (2), due to the increase of the liquid volume, the first water transport pipe (3) has a higher pressure , and impact into the inner liner (406), the rainwater entering the inner liner (406) is doped with solid impurities and harmful bacteria, and through the heating element in the mechanism, the molecular activity of harmful bacteria is improved, and the strong acid and alkali substances are It decomposes quickly under the influence of high temperature, and at the same time, the transmission parts in the mechanism are used to stir the rainwater to accelerate the reaction efficiency; S3: After processing for a period of time, use the water pump (506) in the pressurized tank (501) to increase the negative pressure in half of the area, and use the second water channel (11) to transport first into the pressurized tank (501), and filter the residue, and under the backflow of a small amount of liquid, enter the inner tank (406) again through the second water channel (11), and deposit at the bottom of the inner tank (406); S4: When a certain amount of foreign matter is deposited in the inner tank (406), use the movable connection between the metal rod (8) and the U-shaped frame (9) to open the sealing cover (10) on the top of the loading cylinder (401), It is enough to clean the residue inside the inner tank (406). 10. The construction method of the sponge city system according to claim 9, characterized in that: in said S3: when the treated rainwater enters the third waterway (12) quickly under the pumping of the water pump (506) ), the rainwater is transported into the second water collecting tank (601) by the third water channel (12), because the top of the second water collecting tank (601) is infinitely close to the surface soil, when the area needs to be humidified, the circular hole ( The spray gun (604) in 603) will generate a high compression capacity inside, and the rainwater stored in the second water collecting tank (601) is first introduced into the spray gun (604) by the water pipe (605), and then the water is sent by the spray gun (605). 604) sprayed into the soil, under the constant impregnation of the water source, so that the area quickly maintains a moist environment.

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