Sponge City Rainwater Filtration and Purification Device

Abstract

This utility model relates to a rainwater filtration and purification device for sponge cities, comprising a purification chamber; the purification chamber is equipped with an inlet pipe connected to the outlet of a sewage interception basket, and an outlet pipe connected to the inlet of a rainwater storage tank; the purification chamber is equipped with a partition, dividing it into an inlet chamber connected to the inlet pipe and a drainage chamber connected to the outlet pipe; a diversion pipe is also provided inside the purification chamber; one end of the diversion pipe is located in the inlet chamber, with its opening extending downwards, below the liquid surface of the inlet chamber and away from the bottom of the inlet chamber; the other end of the diversion pipe passes through the partition and is connected to the outlet pipe via a filtration device. By setting up a synergistic structure of the diversion pipe and the filtration device, multi-stage filtration of rainwater from the inlet chamber to the drainage chamber is achieved. The diversion pipe guides the relatively clean rainwater from the upper layer of the inlet chamber into the filtration device, effectively avoiding the sediment and suspended solids deposited at the bottom, thereby significantly improving the rainwater purification effect.

Description

Technical Field

[0001] This utility model relates to the field of sponge city technology, specifically a sponge city rainwater filtration and purification device. Background Technology

[0002] A sponge city is a city that can act like a sponge, absorbing, storing, infiltrating, and purifying rainwater when it rains, and releasing and utilizing the stored water when needed.

[0003] Traditional rainwater harvesting systems typically incorporate interceptor baskets and pre-treatment devices at their inlet to achieve initial impurity filtration. However, this structure suffers from the following technical drawbacks:

[0004] 1. The intercepting basket can only intercept larger particles of impurities, but cannot effectively separate fine mud and suspended solids, resulting in low purity of the stored rainwater.

[0005] 2. Because fine particles and pollutants in rainwater are not fully removed, stored rainwater may cause secondary pollution when used later (such as for irrigation, flushing, etc.), affecting the ecological environment.

[0006] 3. During long-term operation, silt and suspended solids can easily accumulate in pipes, water storage facilities, or filtration devices, causing system blockage, increasing maintenance costs, and reducing rainwater collection efficiency.

[0007] Existing rainwater harvesting technologies lack efficient multi-stage filtration and automatic sewage discharge functions, making it difficult to meet high standards of rainwater purification. Therefore, there is an urgent need for a rainwater harvesting and purification device that can effectively separate silt and suspended solids and has anti-clogging functions to improve rainwater utilization and reduce environmental pollution. Utility Model Content

[0008] To address the technical problems in the background art, this utility model discloses a rainwater filtration and purification device for sponge cities.

[0009] This utility model provides a rainwater filtration and purification device for sponge cities, including a purification chamber;

[0010] The purification chamber is equipped with an inlet pipe connected to the outlet of the intercepting basket, and an outlet pipe connected to the inlet of the rainwater storage tank.

[0011] The purification chamber is equipped with a partition, which divides the purification chamber into an inlet chamber connected to the inlet pipe and a drain chamber connected to the outlet pipe.

[0012] The purification chamber is also equipped with drainage pipes;

[0013] One end of the drainage tube is located inside the water inlet chamber, with its opening extending downwards. This opening is located below the liquid surface of the water inlet chamber and away from the bottom of the water inlet chamber.

[0014] The other end of the drain pipe passes through the partition and is connected to the outlet pipe via a filter device.

[0015] The beneficial effects of the above setup are: 1. By setting up a cooperative structure between the drainage pipe and the filter device, multi-stage filtration of rainwater from the inlet chamber to the outlet chamber is achieved. 1. The diversion pipe guides the relatively clean rainwater from the upper layer of the inlet chamber into the filtration device, effectively avoiding the sediment and suspended solids deposited at the bottom, thus significantly improving the rainwater purification effect and solving the problem that traditional intercepting baskets cannot filter fine particles; 2. The filtration device further removes fine particles and pollutants from the rainwater, ensuring the purity of the stored rainwater and avoiding secondary pollution during subsequent use (such as irrigation and flushing), meeting environmental protection requirements and protecting the ecological environment; 3. The inlet of the diversion pipe is located below the liquid surface and far from the bottom of the inlet chamber, which reduces the probability of sediment and suspended solids entering the filtration device, thereby significantly reducing the risk of blockage in the pipes and filtration device, extending the service life of the system, and reducing maintenance frequency and costs; 4. This utility model replaces the traditional rainwater pretreatment device, not only achieving the purpose of filtration and purification, but also the flow channel in this utility model has a simpler structure and fewer deflections compared to the flow channel in the traditional rainwater pretreatment device. Therefore, this utility model reduces the resistance to rainwater flow, has a larger flow rate, and is more suitable for areas with high rainfall.

[0016] In the vertical projection, the width of the drainage pipe is smaller than the width of the filter device. To improve the utilization rate of the filter device, a further design is implemented: the portion of the drainage pipe located in the drainage chamber is designated as a drainage pipe, with its opening sealed; the drainage pipe has multiple radial through-holes penetrating both the inner and outer walls; the upper side of the filter device rests against the lower side of the drainage pipe; and the area below the filter device connects to the outlet pipe. With this configuration, rainwater sprays outward from the through-holes, evenly covering the upper surface of the filter device, ensuring that there are no dead zones and that filtration is achieved across the entire surface.

[0017] If the filter device is unstable and shifts downwards, the side of the filter device may block the inlet of the outlet pipe. This not only affects the rainwater output flow rate but also results in rainwater flowing directly into the outlet pipe without being fully filtered, leading to low rainwater cleanliness. Therefore, a further improvement is made: a horizontally arranged connecting pipe is installed at the lower end of the filter device; the upper end of the connecting pipe abuts against the lower end of the filter device, and the lower end abuts against the bottom of the drain chamber; the connecting pipe also has multiple through holes. This design allows the connecting pipe to support the filter device, making its position more stable; moreover, rainwater falls from the lower end of the filter device before entering the outlet pipe, ensuring that this rainwater is fully filtered and has higher cleanliness.

[0018] Since sediment deposition in the water inlet chamber will cause caking, it is difficult to extract and clean with a sludge suction truck. Based on this, a further improvement is that an air diffuser pipe is also provided in the water inlet chamber; the air diffuser pipe is provided with air diffuser holes, and after compressed air enters the air diffuser pipe, it sprays out from the air diffuser holes.

[0019] To increase the working area of the air diffuser pipe, a further design is that the air diffuser pipe is in a "field" shape and is horizontally arranged near the bottom of the water inlet chamber.

[0020] The setting position of the air source of the air diffuser pipe directly affects the convenience of operation. Based on this, a further improvement is that the air diffuser pipe is also connected with an air pipe; the air pipe extends upward and is connected to the outlet of an air compressor installed on the ground. Brief Description of the Drawings

[0021] The present utility model will be further described below in conjunction with the drawings and embodiments.

[0022] Figure 1 is a schematic structural view of the present utility model;

[0023] Figure 2 is Figure 1 an enlarged view of part A in

[0024] Figure 3 is a top view of the air diffuser pipe;

[0025] In the figure: 1, purification chamber; 2, water inlet pipe; 3, water outlet pipe; 4, partition board; 4, water inlet chamber; 6, drainage chamber; 7, drainage pipe; 8, through hole; 9, filtering device; 10, connecting pipe; 11, air diffuser pipe; 12, air diffuser hole; 13, air pipe; 14, left inspection well; 15, right inspection well; 16, chamber body; 17, left end cover; 18, right end cover; 71, drain pipe. Detailed Description of the Preferred Embodiments

[0026] The present utility model will now be further described in detail with reference to the drawings. These drawings are all simplified schematic diagrams, only illustrating the basic structure of the present utility model in a schematic manner, so they only show the components related to the present utility model.

[0027] As Figure 1 shown, and taking Figure 1 as the reference perspective, the present utility model discloses a sponge city rainwater filtration and purification device, including a purification chamber 1. The purification chamber 1 includes a horizontally arranged chamber body 16, the left and right ends of the chamber body 16 penetrate and are respectively sealed with a left end cover 17 and a right end cover 18, which are fixed and sealed by welding. At both ends of the upper side of the chamber body 16, a left inspection well 14 and a right inspection well 15 extend upward respectively, facilitating workers to enter the chamber body 16 for maintenance.

[0028] At the middle position of the left inspection well 14, a water inlet pipe 2 is connected and communicated. The water inlet pipe 2 is connected to the outlet of the sewage interception hanging basket. At the lower part of the right end cover 18, a water outlet pipe 3 connected to the inside of the bin body 16 is connected. The water outlet pipe 3 is connected to the inlet of the rainwater storage pool. Rainwater flows into the bin body 16 from the water inlet pipe 2 and then flows out from the water outlet pipe 3.

[0029] In the bin body 16, a vertically arranged partition plate 4 is provided, which divides the bin body 16 into a water inlet cavity 4 connected to the water inlet pipe 2 and a drainage cavity 6 connected to the water outlet pipe 3. The outer side wall of the partition plate 4 is hermetically connected to the inner wall of the bin body 16.

[0030] A drainage pipe 7 is also provided in the purification bin 1; one end of the drainage pipe 7 is located in the water inlet cavity 4, and this part is in the shape of a U with the opening downward, and its pipe orifice faces downward, and this pipe orifice is located below the liquid level of the water inlet cavity 4 and away from the bottom of the water inlet cavity 4; the other end of the drainage pipe 7 passes through the partition plate 4 and extends horizontally. The part of the drainage pipe 7 located in the drainage cavity 6 is set as a drain pipe 71, and its right end abuts against the right end cover 18 and is blocked by the right end cover 18. As Figure 2 shown, a plurality of oblong through holes 8 are opened on the drain pipe 71, and the length direction of this through hole 8 is parallel to the axial direction of the drain pipe 71. A filtering device 9 is abutted against the lower end of the drain pipe 71 for filtering impurities in rainwater. A horizontally arranged connecting pipe 10 is provided at the lower end of the filtering device 9. The left end of the connecting pipe 10 abuts against the right end face of the partition plate 4 and is blocked by the partition plate 4; the right end of the connecting pipe 10 is connected to the water outlet pipe 3. The lower end of the connecting pipe 10 abuts against the bottom of the bin body 16, and the upper end abuts against the filtering device 9. A plurality of oblong through holes 8 are also opened on the connecting pipe 10, and the length direction of this through hole 8 is parallel to the axial direction of the connecting pipe 10.

[0031] The setting of the through holes 8 on the drain pipe 71 enables rainwater to spray outwards from the through holes 8 and evenly sprinkle on the upper end face of the filtering device 9, so that there are no dead corners in the filtering device 9 and it can all perform filtering. The setting of the through holes 8 on the connecting pipe 10 enables the filtered rainwater to enter the connecting pipe 10 through the through holes 8 and then flow out from the water outlet pipe 3. The setting of the connecting pipe 10 also plays a supporting role for the filtering device 9, making the position of the filtering device 9 more stable; and the rainwater only enters the water outlet pipe 3 after falling from the lower end of the filtering device 9, and this rainwater is completely filtered by the filtering device 9 and has a higher cleanliness.

[0032] Since the phenomenon of caking occurs when sediment precipitates in the water inlet cavity 4 and it is difficult to extract and clean by a sludge suction truck, based on this, an air diffuser pipe 11 is also provided in the water inlet cavity 4; air diffuser holes 12 are provided on the air diffuser pipe 11, and compressed air enters the air diffuser pipe 11 and sprays out from the air diffuser holes 12. As Figure 3 shown, the air diffuser pipe 11 is spliced by pipes into a "field" shape and is horizontally arranged at a position close to the bottom of the water inlet cavity 4. With such a setting, the air diffuser pipe 11 has a large coverage area and the effect of stirring and mixing sediment is better.

[0033] The aeration pipe 11 is also connected to an air pipe 13, which extends upward and connects to the outlet of an air compressor installed on the ground. This facilitates operation.

[0034] The advantages of this embodiment are: 1. By setting up a cooperative structure between the diversion pipe 7 and the filter device 9, multi-stage filtration of rainwater from the inlet chamber 4 to the outlet chamber 6 is achieved. The diversion pipe 7 guides the relatively clean rainwater from the upper layer of the inlet chamber 4 into the filter device 9, effectively avoiding the sediment and suspended solids deposited at the bottom, thereby significantly improving the purification effect of the rainwater and solving the problem that traditional intercepting baskets cannot filter fine particles; 2. The filter device 9 further removes fine particles and pollutants from the rainwater, ensuring the purity of the stored rainwater and avoiding secondary pollution during subsequent use (such as irrigation and flushing), meeting environmental protection requirements and protecting the ecological environment; 3. The inlet of the diversion pipe 7 is located below the liquid surface and far from the bottom of the inlet chamber 4, which can reduce the amount of sediment and suspended solids entering the filter device 9. This significantly reduces the risk of clogging in pipes and filter devices 9, extends system lifespan, and reduces maintenance frequency and costs. 4. This embodiment replaces the traditional rainwater pretreatment device, which is the pretreatment rainwater device disclosed in patent CN201510591599.5. It not only achieves the purpose of filtration and purification, but also the flow channel in this embodiment is simpler in structure and has fewer deflections compared to the flow channel in the traditional rainwater pretreatment device. Therefore, this embodiment reduces the resistance to rainwater flow, has a larger flow rate, and is more suitable for areas with high rainfall.

[0035] Based on the above-described preferred embodiments of this utility model, and through the foregoing description, those skilled in the art can make various changes and modifications without departing from the technical concept of this utility model. The technical scope of this utility model is not limited to the contents of the specification, but must be determined according to the scope of the claims.

Claims

1. A sponge city rainwater filtering and purifying device, characterized in that: It includes a purification tank (1); The purification tank (1) is provided with a water inlet pipe (2) connected to the outlet of the sewage interception hanging basket, and also provided with a water outlet pipe (3) connected to the inlet of the rainwater storage tank; The purification tank (1) is provided with a partition plate (4), which divides the purification tank (1) into a water inlet chamber (5) connected to the water inlet pipe (2) and a drainage chamber (6) connected to the water outlet pipe (3); A drainage pipe (7) is further provided in the purification tank (1); One end of the drainage pipe (7) is located in the water inlet chamber (5), and its pipe orifice extends downward, and this pipe orifice is located below the liquid level of the water inlet chamber (5) and away from the bottom of the water inlet chamber (5); The other end of the drainage pipe (7) passes through the partition plate (4) and is connected to the water outlet pipe (3) through a filtering device (9).

2. The sponge city rainwater filtering and purifying device according to claim 1, characterized in that: The part of the drainage pipe (7) located in the drainage chamber (6) is set as a drain pipe (71), and the pipe orifice of the drain pipe (71) is blocked; The drain pipe (71) is provided with a plurality of through holes (8) radially penetrating the inner and outer walls; The upper side of the filtering device (9) abuts against the lower side of the drain pipe (71); The area below the filtering device (9) is connected to the water outlet pipe (3).

3. The sponge city rainwater filtering and purifying device according to claim 2, characterized in that: A horizontally arranged connecting pipe (10) is further provided at the lower end of the filtering device (9); The upper end of the connecting pipe (10) abuts against the lower end of the filtering device (9), and the lower end of the connecting pipe (10) abuts against the bottom of the drainage chamber (6); The connecting pipe (10) is also provided with a plurality of through holes (8).

4. The sponge city rainwater filtering and purifying device according to claim 1, characterized in that: An air曝气管(11) is further provided in the water inlet chamber (5); the air曝气管(11) is provided with air holes (12), and compressed air enters the air曝气管(11) and then sprays out from the air holes (12).

5. The sponge city rainwater filtering and purifying device according to claim 4, characterized in that: The air曝气管(11) is in the shape of a "field" and is horizontally arranged near the bottom of the water inlet chamber (5).

6. The sponge city rainwater filtering and purifying device according to claim 5, characterized in that: The air曝气管(11) is further connected to an air pipe (13); The air pipe (13) extends upward and is connected to the outlet of an air compressor installed on the ground. It should be noted that there is an incorrect "曝气管" in the original text which may be a misspelling. I translated it as "air曝气管" for the purpose of maintaining consistency with the original text. You may need to check and correct it in the original source.

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