Rainwater efficient utilization system for parking shed

Abstract

The utility model discloses a parking shed rainwater efficient utilization system and relates to the technical field of parking shed water circulation. Comprising a solar panel roof rainwater collecting and treating unit, a code scanning self-service car washing unit and a car washing wastewater treating and recycling unit. Rainwater collected by a V-shaped parking shed photovoltaic panel roof with a blocked edge is filtered by a filter screen below, is collected to an initial rainwater pool through a water collection vertical pipe, and is collected into a reservoir through a first filter; a first water suction pump in the code scanning self-service car washing unit pumps water in a water storage tank, the water is supplied to a car washing gun through the first water suction pump, waste water generated after car washing is collected through a slope-shaped rainwater grate, and rainwater completely immerses a degreasing filter material filled with three layers below; the wastewater is subjected to targeted second-time degreasing and filtering treatment, the cleanliness of an irrigation water source is guaranteed through two-time degreasing treatment, purified water flows into a clean water pool, and sprinkling irrigation equipment is used for regularly sprinkling water to surrounding green plants. Water resource shortage in arid areas is effectively relieved, and the pressure of a municipal drainage system is relieved.

Description

TECHNICAL FIELD

[0001] The utility model relates to a parking shed rainwater efficient utilization system, and the whole system uses electricity by parking shed photovoltaic board solar energy conversion to provide. It is a system for reducing the drainage pressure of the drainage system around the open-air parking lot, avoiding environmental pollution, and improving the rainwater recycling rate. BACKGROUND

[0002] As a common ground parking rain-shielding device, most of the rainwater of the parking shed is directly discharged into the municipal drainage system through the drainage pipeline. The rainwater flows into the drainage pipe along the slope of the shed roof and then enters the ground drainage ditch or drainage system. In heavy rain, the municipal drainage system may be overburdened, leading to poor drainage or urban waterlogging. The rainwater on the surface of the parking shed may carry pollutants such as soil, dust, and oil stains, which may pollute the water body if directly discharged into the drainage system, especially when there are cars in the parking shed, the oil stain problem is more serious. For some simple parking sheds without a special drainage system, rainwater will directly flow from the roof to the ground and then seep into the ground or flow along the road. Long-term use of this method will cause muddy and waterlogged ground, and even cause erosion to the foundation and surrounding environment, affecting walking and parking experience. If the parking shed is near a pollution source (such as oil leakage from parked vehicles, chemical leakage, etc.), the rainwater may carry pollutants into the ground, affecting the quality of groundwater. In summary, the current parking shed rainwater runoff process has the following problems:

[0003] (1) Overburdened drainage system (2) Pollutant discharge (3) Rainwater resources are not effectively utilized

[0004] In view of the above problems, how to reduce the drainage pressure, avoid environmental pollution, and improve the rainwater recycling rate has become a major challenge in the current technical problem. However, there is currently no device or system that can effectively handle and utilize parking shed rainwater resources.

[0005] Therefore, it is necessary to develop a drainage design that optimizes drainage, effectively collects and utilizes rainwater, and brings environmental protection to the surrounding area. This not only effectively reduces the drainage pressure, avoids environmental pollution, and improves the rainwater recycling rate. INVENTION CONTENTS

[0006] To solve the pollution caused by parking shed rainwater discharge to the ground and the pressure on the municipal drainage system, the utility model provides a parking shed rainwater efficient utilization system and method.

[0007] The system comprises a solar panel roof rainwater collection and treatment unit, a code scanning self-service car washing unit and a car washing wastewater treatment and recycling unit; the solar panel roof rainwater collection and treatment unit comprises a parking shed photovoltaic panel roof (1-1) in the shape of a v-shaped section as a whole, a flat filter screen (1-2) is arranged in the middle lower part of the v-shaped section, both ends of the v-shaped parking shed photovoltaic panel roof (1-1) are provided with a seal (1-3), the bottom of both ends of the v-shaped parking shed photovoltaic panel roof (1-1) is provided with a downward water collecting vertical pipe (1-4), the water collecting vertical pipe is connected with a first flush tank (1-5) through a flow guide pipe, the first flush tank is connected with a first rainwater filter (1-6) (preferably a decentralized filter) and a water storage tank (1-7) in sequence through a pipeline; the v-shaped photovoltaic panel roof with the sealed end is configured to collect rainwater, the filter screen is arranged at the bottom end of the photovoltaic panel roof, a row of water collecting vertical pipes is connected below the filter screen, a flow guide pipe (adopted) with an inclination of 1.5% (obtained according to the Code for Design of Building Water Supply and Drainage and Heating Engineering (GB 50015)) is connected below the water collecting vertical pipes, the flow guide pipe is directly connected with one side of the upper end of the first flush tank (1-5), the other side of the upper end of the first flush tank (1-5) is connected with the upper end of the first rainwater filter (1-6) (preferably a decentralized filter) through a pipe, and the clean water flows through the water storage tank (1-7) from the other side of the upper end of the first rainwater filter (1-6) through a pipe;

[0008] The code scanning self-service car washing unit comprises a two-dimensional code car washer (2-1) provided with a first water pump and a car washing gun, a car washing platform (2-2), an oil stain filtering device (2-4) and a sedimentation tank (2-5). The water inlet pipe of the first water pump of the two-dimensional code car washer is connected with the water storage tank (1-7), the water outlet pipe of the first water pump is connected with the car washing gun, and the first water pump and the car washing gun are provided with a two-dimensional code scanning payment device (which is a mature technology and is not limited in specific, as long as the code scanning payment can be realized and the car washing gun can spray water to wash the car); the car washing platform (2-2) is a prismatic platform, which contains a parking space at the upper end, and the side of the prismatic platform is provided with a slope-shaped rainwater grate (2-3), the rainwater and the car washing wastewater obtained by using the car washing gun can be collected into the rainwater grate (2-3), and below the rainwater grate (2-3) is the oil stain filtering device (2-4) which is replaceable and contains three layers of filter materials, and below the oil stain filtering device (2-4) is the sedimentation tank (2-5);

[0009] The car washing wastewater treatment and recycling unit comprises a second filter (3-1) (preferably a decentralized filter), a clean water tank (3-2), a second water pump (3-3) and a irrigation and spraying device (3-4). The sedimentation tank (2-5) is connected with the second filter (3-1) and the clean water tank (3-2), the clean water tank (3-2) is connected with the irrigation and spraying device (3-4) through the second water pump (3-3) through a pipeline.

[0010] The v-shaped photovoltaic panel roof (1-1) collects rainwater by gravity into the initial rainwater pool (1-5).

[0011] The first rainwater filter has a vertical structure, and a first sewage interception tank (4-2) is arranged at the lower end of the bottom of the vertical cavity. A first filter tank (4-4) is arranged at the middle lower part of the vertical cavity, and the first filter tank (4-4) is independent and replaceable. The first filter tank (4-4) is filled with first filter material (4-3). The water outlet (4-5) is arranged at the upper part of the side of the cavity, and the water inlet pipe (4-1) is arranged at the side below the first filter tank (4-4). The side water inlet is connected to the water inlet pipe (4-1) by cutting into the side, and the physical position of the water inlet end of the water inlet pipe (4-1) is flush with the water outlet.

[0012] The second filter has a vertical cavity structure, and a water inlet (5-1) is arranged at the upper part of the side of the cavity. An oil floating plate (5-6) is arranged at the upper end of the inside of the cavity to isolate oil stains. The oil floating plate (5-6) is lower than the position of the water inlet (5-1). A second sewage interception tank (5-2) is arranged at the lower end of the bottom of the vertical cavity. When entering the second filter, large filter residues have been precipitated in the sedimentation tank, and only relatively small suspended particles remain. A second filter tank (5-5) is arranged at the middle lower part of the vertical cavity, and the second filter tank (5-5) is independent and replaceable. The second filter tank (5-5) is filled with second filter material (5-4). The water outlet pipe (5-1) is arranged at the side below the second filter tank (5-5).

[0013] The oil stain filtering device (2-4) includes at least three layers from top to bottom, namely, a first layer: a coarse filter layer, which is made of polypropylene, polyester and other synthetic fiber materials, and is used for capturing relatively large particle impurities; a second layer: an oil-water separation layer, which is made of hydrophobic materials such as polyethylene, hydrophobic foam and the like, and is used for absorbing oil stains; and a third layer: a fine filter layer, which is made of activated carbon or non-woven fabric, and is used for further removing residual oil stains and fine particles.

[0014] The filter material of the first rainwater filter (1-6) (preferably a decentralized filter) and the second filter (3-1) (preferably a decentralized filter) is different, and the inlet and outlet ends are also different. The first rainwater filter (1-6) uses quartz sand, anthracite, ceramsite, activated carbon and other materials with strong sewage interception and adsorption capacity and good wear resistance. It can quickly and efficiently treat impurities in rainwater. The second filter (3-1) uses fiber balls, modified fiber balls and other materials. The fiber balls have good elastic effect and do not float to the water surface. The filtration speed is fast. It can effectively remove suspended solids, oil stains, organic matter, colloidal particles and microorganisms in water. The first filter outlet (4-5) is located on the upper side of the cavity. The inlet pipe (4-1) enters from the side below the first filter blue (4-4). In this way, the filter residue is largely settled. The second filter inlet (5-1) is located on the upper side of the cavity, and a floating oil plate (5-6) is arranged inside the cavity to isolate oil stains. The outlet pipe (5-3) is arranged on the side below the second filter blue (5-5). When the car washing wastewater and rainwater enter the second filter, the large filter residue has settled in the sedimentation tank, and only small suspended particles enter.

[0015] The specific technical solutions are as follows:

[0016] In the solar panel roof rainwater collection and treatment unit, the rainwater collected by the v-shaped parking shed photovoltaic panel roof with edge plugging (1-3) is filtered by the filter screen (1-2) below to remove large particles. The collected rainwater is collected into the flow guide pipe through the water collection vertical pipe (1-4), and then is collected into the initial rainwater tank (1-5). When the initial rainwater tank is full of water, it is considered that the dirty water collection is completed, and the remaining rainwater is relatively clean rainwater. The rainwater enters the first filter (1-6) through the water outlet guide pipe for filtration treatment. The stains are left in the filter, and the clean water is collected into the water storage tank (1-7). When the customer needs to wash the car, the water in the water storage tank is pumped out by the first water pump in the self-service car washing unit, and is supplied to the car washing station through the first water pump. The customer can set the gear position to adjust the washing time. The wastewater after washing the car and the rainwater during normal rainfall are collected by the inclined rainwater grate (2-3) in the car washing wastewater treatment and recycling unit, and the rainwater completely immerses the three-layer oil stain filter material (2-4) below. The first layer is a coarse filter layer using polypropylene, polyester and other synthetic fiber materials to capture large particles. The second layer is an oil-water separation layer using hydrophobic materials such as polyethylene and hydrophobic foam to specifically absorb oil stains. The third layer is a fine filter layer using activated carbon or non-woven fabric to further remove residual oil stains and fine particles. The sedimentation tank settles the particles, and then the wastewater and rainwater enter the second filter (3-1) for targeted second oil stain removal filtration treatment. The two times of oil stain removal treatment ensures the cleanliness of the irrigation water source, and the clean water flows into the clean water tank and is sprayed by the sprinkler equipment (3-4) to the surrounding green plants for regular watering.

[0017] Further, the solar panel roof rainwater collection processor is composed of a photovoltaic panel (1-1), an aluminum plate (1-3), and a filter screen (1-2).

[0018] Further, the initial rainwater pool (1-5) is a cuboid water storage tank with a length of 3 meters, a height of 1 meter, and a width of 1 meter. It is generally believed that the first 3mm of rainwater is not clean. The water flows into the inlet from the upper end of the side wall through the inlet pipe, and when the dirty water is full, it flows into the decentralized rainwater filter from the outlet on the other side.

[0019] Further, the first filter has a unique rainwater treatment mechanism. Rainwater enters from the side of the inlet end (4-1) and is connected to the bottom. This special water inlet mode makes the water flow into the interior along the tangent direction of the interior wall, forming two special water flow patterns: cyclone and radial flow. In this water flow state, particles, sand, and other substances are deposited at the bottom due to gravity, while larger impurities are effectively intercepted by the specially designed sewage basket (4-2). The sewage basket is designed to be very convenient and can be regularly removed for cleaning. At the same time, the accumulated sludge at the bottom can be easily pumped out during the cleaning operation of the filter material. After cyclone separation, the rainwater continues to flow upwards and then enters the filter basket (4-4) area. The filter basket (4-4) contains a variety of (4-3) special filter materials, which act like a series of precise filters and adsorbers. They not only filter out smaller particles, but also have excellent adsorption and filtration capabilities for suspended solids, macromolecular organic matter, and colloidal impurities in water. Through this series of complex and orderly processes, the filter finally outputs the ideal rainwater that meets the requirements, perfectly achieving the treatment function of the processor and providing a strong guarantee for rainwater purification and reuse. Further, the water storage tank (1-7) is regularly disinfected by adding disinfection tablets to achieve the purpose of disinfection.

[0020] Further, the car washer (2-1) is equipped with a high-power water pump and a car washing gun. Customers can control the washing time by adjusting the gear through scanning the code. When the order is placed, the car washer is powered on, and when it is finished, it automatically powers off.

[0021] Further, the oil-stained filter material (2-4) contains three layers of filter material, namely coarse filter layer, oil-water separation layer, and fine filter layer. The filter material is located below the rainwater grate and can be replaced regularly.

[0022] Further, the sand settling tank (2-5) is rich in chemical elements needed by vegetation and can be used for fertilizing and soil fixation for surrounding vegetation after regular cleaning.

[0023] Further, the second rainwater treatment device is an oil treatment device, which is different from the first filter in that a floating oil plate (5-6) is arranged in the cavity, waste water enters from a water inlet (5-1) at the upper end of the treatment device, and is fully immersed in filter material (5-4) in a filter basket (5-5) from top to bottom. The filter material (5-4) uses oil removal devices such as fiber balls and modified fiber balls, can adsorb and filter suspended solids, organic chemicals, colloids and other substances in the car washing waste water, and can be replaced regularly. The bottom is provided with a filter basket (5-2) to intercept stains, and finally an outlet pipe (5-3) outputs relatively ideal rainwater.

[0024] The system installation steps are as follows: the plugging (1-3) is welded with the photovoltaic panel (1-1) of the parking shed to form a complete rainwater collector, and a filter screen is sealed at the water inlet of the collector, wherein the photovoltaic panel provides power for the whole process. The buried pipe is connected with the pipeline of the parking shed, the aperture of the buried pipe is larger than that of the pipeline of the parking shed, and a 1.5% slope is arranged for the flow guide cross pipe to form a certain potential energy, so that the water flow is conveniently guided into the initial rainwater pool. After the initial rainwater pool (1-5) is filled with water, the water flows into the first filter (1-6). The filter is buried, and a pit is dug in advance to bury the upper end cover, so that the filter material and filter screen can be conveniently checked and replaced. The filter and the water storage tank are connected by a water pipe. The water storage tank is 2m high and 3m deep, and the upper 1m is covered with soil. The upper end of the car washer is connected with the water storage tank by a water pipe. When washing the car, the water pump is powered on to pump water, and the power is turned off at regular time. A rainwater grate (2-3) is arranged on the slope of the car washing platform (2-2) to treat the waste water after washing the car and the rainwater during normal rainfall. The lower end of the rainwater grate is an oil removal filter material (2-4) and a sedimentation tank (2-5), which can be cleaned regularly. The water flow enters the second filter (3-1) along the drain pipe, and the waste water after washing the car is filtered. The upper end of the clean water tank (3-2) is connected with the second water pump (3-3) to supply water to the shower head (3-4), and the surrounding green plants are irrigated regularly.

[0025] The utility model discloses a beneficial effect is: the utility model discloses through the modification parking lot, adds the filter, the two -dimensional code car washer, the rainwater grate, irrigates the nozzle and so on equipment greatest degree utilization rainwater. Can effectively alleviate the problem of water resource shortage in arid regions, alleviate the pressure of municipal drainage system, alleviate the pollution brought by parking shed drainage, alleviate the waterlogging problem brought by heavy rain, irrigate the multiple benefits of surrounding green plants, and achieve more with less. The system aims to maximize the use of rainwater resources, and alleviate the pressure of municipal drainage system, alleviate the pollution brought by parking shed drainage, irrigate the multiple benefits of surrounding green plants. Its main feature lies in that the system can collect rainwater resources, filter and store, and then provide car washing service for customers when customers have car washing demand, and the waste water after washing the car is stored after secondary filtration, and the surrounding green plants are irrigated regularly. BRIEF DESCRIPTION OF DRAWINGS

[0026] Figure 1This is a three-dimensional and interface schematic diagram of the solar panel roof rainwater collection and treatment unit according to Embodiment 1 of this utility model.

[0027] Figure 2 This is a schematic diagram of the three-dimensional view and interface of the self-service car wash unit based on the QR code scanning in Embodiment 1 of this utility model.

[0028] Figure 3 This is a schematic diagram of the three-dimensional structure and interface of the car wash wastewater treatment and reuse unit described in Embodiment 2 of this utility model.

[0029] Figure 4 This is a schematic diagram of the three-dimensional structure and interface of the first filter in the solar panel roof rainwater collection and treatment unit according to Embodiment 1 of this utility model.

[0030] Figure 5 This is a schematic diagram of the three-dimensional structure and interface of the second filter in the car wash wastewater treatment and reuse unit described in Embodiment 2 of this utility model.

[0031] Figure 6 This is a cross-sectional view of the car wash station in the self-service car wash unit described in Embodiment 1 of this utility model.

[0032] Figure 7 This is a schematic diagram of the three-dimensional structure and interface of the integrated parking shed rainwater high-efficiency utilization system of this utility model. Detailed Implementation

[0033] The present invention will be further described below with reference to the embodiments, but the present invention is not limited to the following embodiments.

[0034] Example 1:

[0035] This embodiment presents a system and method for the efficient utilization of rainwater resources from parking shed roofs. For example... Figure 1 As shown. This embodiment includes: a rainwater harvesting device, a rainwater treatment device, and a rainwater utilization device, wherein the rainwater harvesting device is as follows: Figure 1 As shown, (1-1) is the structure of the photovoltaic panel, which serves to collect rainwater. The photovoltaic panel can convert solar energy into electrical energy to provide power for the entire system. Initial rainwater is collected in the funnel, passes through the filter screen (1-2), where large filter residue remains outside, and the remaining rainwater flows down the pipe.

[0036] The rainwater treatment device, (1-5) is a preliminary rainwater pool. We usually consider that the water quality of the first 3mm of rainwater is dirty. The preliminary rainwater pool is used to collect dirty water. When the water in the pool is full, the water entering the filter is clean water quality. The water flow enters the dispersed rainwater filter shown in (1-6) through the water inlet (4-1). The water flow enters the inside along the tangent direction of the inner wall of the processor, and forms a cyclone and a radial flow on the inner cavity. The deposited particles and silt fall into the bottom screen. The larger impurities are intercepted by the sewage basket (4-2). The sewage basket can be taken out regularly. The rainwater separated by cyclone continues to flow upward. The rainwater passes through various filter materials (4-3) in the filter basket (4-4). The filter materials further filter out fine particles, and can adsorb and filter suspended matter, macromolecular organic matter, colloids and other substances in the water. The output is ideal rainwater, which completes the processing function of the processor. The relatively clean water quality is discharged through the upper end outlet (4-5) and flows into the storage pool (1-7) shown. 3 The water body shown in (1-7) is a rectangular structure with a length of 30m, a height of 1m and a width of 2m, which can accommodate 60m

[0037] The rainwater utilization device is as shown in Figure 2 (2-1) is a self-service car washing machine with code scanning. The car washing machine is built-in with a water pump with a rated power of 1500w and a peak power of 9800w. A water suction pipe with a length of 25m is connected with the car washing gun through the first water pump. The water suction pipe is connected with the water storage pool. Customers can select the washing time gear by scanning the two-dimensional code on the body of the car washing machine. The order starts to be powered on. The clean water is absorbed from the water storage pool through the water suction pipe to supply the car washing gun for washing. The order ends to automatically power off, which not only ensures the power safety of the equipment, but also effectively saves the power. The waste water after washing and the rainwater can flow through the oil stain removal device (2-4) through the rainwater grate (2-3) and then flow to the second filter (3-1) through the sedimentation tank (2-5). The sand settling tank (2-5) is a structure with teeth. The large particle impurities are retained at the bottom end of the sand settling tank. The waste residue in the sand settling tank can be cleaned regularly. The rich substances can be used as fertilizer for surrounding green plants. The remaining waste water flows into the pipeline.

[0038] Figure 6 It is a transverse section structure of the car washing platform. (6-1) is a rainwater grate. The waste water and rainwater can flow through it to the oil stain removal filter material shown in (6-2). (6-3) is a sedimentation tank for sedimentation filter residue.

[0039] Example two

[0040] This example combines the first set of configuration upgrade of the car washing waste water treatment and recycling system and method. It includes a rainwater collection device, a rainwater treatment device and a rainwater utilization device, as shown in Figure 3 .

[0041] The car washing waste water treatment and recycling unit is as shown in Figure 3As shown, the car washing wastewater or rainwater flows into the second filter (3-1) through the water pipe with an inclination of 2%, the car washing wastewater or rainwater fully submerges the filter material (5-4) with adsorbed organic chemicals and oil stains in the filter basket (5-5), the filter residue remains in the sewage barrier (5-2), and the purified water after twice filtration flows out from the water outlet (5-3). The filtered purified water enters the purified water pool (3-2), which is a cuboid structure with a length of 15 m, a width of 1 m, and a height of 2 m, and can accommodate 30 m 3 of water. As shown in (3-3), the lifting pump can absorb the purified water in the (3-2) purified water pool through the pipeline to provide water spraying power for the shower (3-4) and irrigate the surrounding green plants.

Claims

1. A parking shed rainwater efficient utilization system, characterized in that, The solar panel roof rainwater collection and treatment unit, the code scanning self-service car washing unit and the car washing wastewater treatment and recycling unit are included; the solar panel roof rainwater collection and treatment unit includes: a parking shed photovoltaic panel roof (1-1) with a v-shaped cross section, a flat filter screen (1-2) arranged in the middle lower part of the v-shaped parking shed photovoltaic panel roof (1-1), a sealing plug (1-3) arranged at the two ends of the v-shaped parking shed photovoltaic panel roof (1-1), a downward water collecting vertical pipe (1-4) arranged at the bottom of the two ends of the v-shaped parking shed photovoltaic panel roof (1-1), the water collecting vertical pipe being connected with an initial rainwater pool (1-5) through a flow guide pipe, the initial rainwater pool being connected with a first rainwater filter (1-6) and a water storage pool (1-7) in sequence through a pipeline; The code scanning self-service car washing unit includes a two-dimensional code car washing machine (2-1) provided with a first water pump and a car washing gun, a car washing platform (2-2), an oil stain filtering device (2-4) and a sedimentation tank (2-5); the water inlet pipe of the first water pump of the two-dimensional code car washing machine is connected with the water storage pool (1-7), the water outlet pipe of the first water pump is connected with the car washing gun, the first water pump and the car washing gun are provided with a two-dimensional code scanning payment device; the car washing platform (2-2) is a prismatic platform, the upper end of which accommodates a parking space, the side of the prismatic platform is a sloping gutter (2-3), the gutter (2-3) can collect the rainwater and the car washing wastewater obtained by using the car washing gun, the oil stain filtering device (2-4) containing three layers of filter material is arranged below the gutter (2-3), and the sedimentation tank (2-5) is arranged below the oil stain filtering device (2-4); The car washing wastewater treatment and recycling unit includes a second filter (3-1), a clean water pool (3-2), a second water pump (3-3) and a irrigation and spraying device (3-4); the sedimentation tank (2-5) is connected with the second filter (3-1) and the clean water pool (3-2), the clean water pool (3-2) is connected with the irrigation and spraying device (3-4) through the second water pump (3-3) and a pipeline.

2. The rainwater high-efficiency utilization system of a parking shed according to claim 1, characterized in that, The v-shaped photovoltaic panel roof with a sealing plug at the end is used for collecting rainwater, the filter screen is arranged at the bottom of the photovoltaic panel roof, a row of water collecting vertical pipes is connected below the v-shaped photovoltaic panel roof, the water collecting vertical pipes are connected with the flow guide pipes with an inclination of 1.5% below, the flow guide pipes are directly connected with the upper end of one side of the initial rainwater pool (1-5), the upper end of the other side of the initial rainwater pool (1-5) is connected with the upper end of the first rainwater filter (1-6) through a pipe, the clean water flows into the water storage pool (1-7) from the upper end of the other side of the first rainwater filter (1-6) through the pipe; the rainwater collected by the v-shaped photovoltaic panel roof (1-1) enters the initial rainwater pool (1-5) in a self-flowing mode.

3. The rainwater high-efficiency utilization system of a parking shed according to claim 1, characterized in that, The initial rainwater pool (1-5) is composed of a cuboid water storage pool with a length of 3m, a height of 1m and a width of 1m, the 3mm rainwater in the early stage is not clean, the water flows into the pool from the side wall upper end inlet through the water inlet pipe, and when the dirty water is full, the overflow flows into the decentralized rainwater filter from the outlet at the other side upper end.

4. The rainwater high-efficiency utilization system of a parking shed according to claim 1, characterized in that, The first rainwater filter has a vertical structure, and a downward first sewage interception blue (4-2) is arranged at the bottom of the vertical cavity, a first filter blue (4-4) which is independent and replaceable is arranged in the middle lower part of the vertical cavity, and the first filter blue (4-4) is filled with first filter material (4-3); a water outlet (4-5) is arranged on the upper side of the cavity, and a water inlet pipe (4-1) is arranged on the side below the first filter blue (4-4), the side water inlet, that is, the water inlet pipe (4-1) is connected in the side, and the physical position of the water inlet end of the water inlet pipe (4-1) is flush with the water outlet; The second filter has a vertical cavity structure, a water inlet (5-1) is arranged on the upper side of the cavity, an oil floating plate (5-6) is arranged at the upper end of the cavity to isolate oil stains, and the oil floating plate (5-6) is lower than the position of the water inlet (5-1); a downward second sewage interception blue (5-2) is arranged at the bottom of the vertical cavity, when entering the second filter, large filter residues have been deposited in the sedimentation tank, and only relatively small suspended particles are left; a second filter blue (5-5) which is independent and replaceable is arranged in the middle lower part of the vertical cavity, and the second filter blue (5-5) is filled with second filter material (5-4); a water outlet pipe (5-3) is arranged on the side below the filter blue (5-5).

5. The rainwater high-efficiency utilization system of a parking shed according to claim 4, characterized in that, The filter materials of the first rainwater filter (1-6) and the second filter (3-1) are different, and the inlet and outlet ends are also different; the first rainwater filter (1-6) can quickly and efficiently treat impurities in rainwater; the second filter (3-1) uses fiber balls and modified fiber balls, the fiber balls have good elastic effect and do not float on the water surface, the filter speed is fast, and the second filter (3-1) can effectively remove suspended matter, oil stains, organic matter, colloidal particles and microorganisms in water; the water outlet (4-5) of the first filter is located on the upper side of the cavity, and the water inlet pipe (4-1) is arranged on the side below the first filter blue (4-4), so that the filter residues are deposited to a large extent; the water inlet (5-1) of the second filter is located on the upper side of the cavity, and an oil floating plate (5-6) is arranged in the cavity to isolate oil stains, and the water outlet pipe (5-3) is arranged on the side below the second filter blue (5-5); when the car washing wastewater and rainwater enter the second filter, the large filter residues have been deposited in the sedimentation tank, and only small suspended particles enter.

6. The rainwater high-efficiency utilization system for parking shed according to claim 1, characterized in that, The oil stain filtering device (2-4) includes at least three layers from top to bottom, namely, a first layer of coarse filter layer using polypropylene and polyester synthetic fiber material to capture particulate impurities, a second layer of oil-water separation layer using hydrophobic material to absorb oil stains, and a third layer of fine filter layer using activated carbon or non-woven fabric to further remove residual oil stains and fine particles.

Images