A filtering separation device for rainwater harvesting

Abstract

This invention provides a filtration and separation device for rainwater collection, comprising a cylindrical body with a rainwater inlet at one end and a rainwater outlet at the other end; the rainwater outlet is located near the top of the cylindrical body; a guide pipe is also provided inside the cylindrical body, with its upper end higher than the liquid level inside the cylindrical body. The beneficial effects of this design are: after rainwater enters the cylindrical body, suspended solids are located at the liquid level, while sediment is located at the bottom of the cylindrical body. Therefore, the guide pipe prevents suspended solids and sediment from entering the guide pipe, resulting in cleaner rainwater discharged from the outlet; the retention of suspended solids and sediment inside the cylindrical body prevents these harmful substances from directly seeping into the ground, thus effectively protecting the soil and groundwater from secondary pollution.

Description

Technical Field

[0001] This utility model relates to the field of rainwater harvesting technology, specifically a filtration and separation device for rainwater harvesting. Background Technology

[0002] Traditional rainwater harvesting systems typically employ a combination of interceptor baskets and rainwater diversion devices, primarily limited to simple filtration of large particulate impurities in rainwater. However, this system suffers from the following technical drawbacks:

[0003] 1. Traditional devices cannot effectively separate fine particles of silt and suspended solids in rainwater, resulting in the accumulation of a large amount of sediment in subsequent storage or infiltration systems. Long-term operation can easily lead to blockage problems and reduce system efficiency.

[0004] 2. In rainwater infiltration applications, rainwater that has not been adequately purified may carry pollutants such as coarse minerals, mineral oil, and hydrocarbons directly into the ground, causing secondary pollution to the soil and groundwater. This problem is particularly prominent in urban runoff pollution load scenarios.

[0005] Therefore, there is an urgent need to develop a highly efficient multi-stage rainwater purification device to separate silt and suspended solids from rainwater, in order to solve the technical bottlenecks of insufficient purification capacity, easy clogging, and pollution of the underground environment in traditional systems. Utility Model Content

[0006] To address the technical problems in the background art, this utility model discloses a filtration and separation device for rainwater collection.

[0007] This utility model provides a filtration and separation device for rainwater collection, including a cylinder, one end of which is provided with a rainwater inlet connected to the outlet of a rainwater diversion device, and the other end is provided with a rainwater outlet connected to the inlet of a rainwater storage tank.

[0008] The rainwater outlet is located near the top of the cylinder;

[0009] The cylinder is also equipped with a guide pipe, the upper end of which is higher than the rainwater outlet.

[0010] The beneficial effects of the above setup are as follows: after rainwater enters the cylinder, suspended solids are located at the liquid surface and silt is located at the bottom of the cylinder. Therefore, with the setting of the diversion pipe, neither suspended solids nor silt will enter the diversion pipe, thus making the rainwater discharged from the rainwater outlet cleaner. Suspended solids and silt are retained in the cylinder, which can prevent these harmful substances from directly seeping into the ground, thereby effectively protecting the soil and groundwater from secondary pollution.

[0011] Since the cylinder is difficult to repair, a further improvement is made by extending the first and second inspection wells upwards from both ends of the cylinder.

[0012] The installation of inspection wells results in the cylinder being buried quite deep. The rainwater inlet and outlet are also located deep within the cylinder, making it difficult to connect to pipelines. Therefore, a further improvement is made: the rainwater inlet is located on the first inspection well, and the rainwater outlet is located on the second inspection well; the upper part of the diversion pipe is located inside the second inspection well.

[0013] When rainwater enters the first inspection well from the rainwater inlet, it impacts the well wall, making the first inspection well prone to damage. Based on this, a further improvement is made: a buffer plate is installed inside the first inspection well facing the rainwater inlet.

[0014] When there is too much silt, it tends to accumulate at the lower end of the guide pipe, which can cause blockage. Based on this, a further improvement is made: an upward-extending baffle is installed at the bottom of the cylinder, near the second inspection well.

[0015] When there is too much mud and sand, it is easy to flow over the baffle to the lower end of the guide pipe. If the guide pipe is too close to the bottom of the cylinder, the lower end of the guide pipe is easily blocked by mud and sand. Based on this, a further improvement is that the lower end of the guide pipe is higher than the baffle or flush with the upper end of the baffle.

[0016] When there is too much silt, it needs to be cleaned. However, silt tends to clump together when it settles, making cleaning difficult. Therefore, a further improvement is made by installing a mixer at the bottom of the cylinder.

[0017] The one-piece molding of the cylinder not only makes it difficult to process, but also makes it inconvenient to install. Based on this, a further improvement is made: the cylinder is tubular, and there are sealing plates at both ends. Attached Figure Description

[0018] The present invention will be further described below with reference to the accompanying drawings and embodiments.

[0019] Figure 1 This is a schematic diagram of the structure of this utility model;

[0020] Figure 2 This is a front sectional view of the present invention;

[0021] In the diagram: 1. Cylinder; 2. Rainwater inlet; 3. Rainwater outlet; 4. Diversion pipe; 5. First inspection well; 6. Second inspection well; 7. Buffer plate; 8. Baffle; 9. Mixer; 10. Blocking plate; 11. Mud pump. Detailed Implementation

[0022] The present invention will now be described in further detail with reference to the accompanying drawings. These drawings are simplified schematic diagrams, illustrating only the basic structure of the present invention, and therefore only show the components relevant to the present invention.

[0023] like Figure 1 and Figure 2 As shown, this utility model discloses a filtration and separation device for rainwater collection, including a horizontally arranged cylindrical body 1. Both ends of the body 1 are fitted with end plates 10, which are fixed and sealed by hot-melt welding. This design, compared to a one-piece injection-molded structure, is not only simpler in structure but also easier to install.

[0024] The first inspection well 5 and the second inspection well 6 extend upwards from both ends of the cylinder 1, respectively. Both the first inspection well 5 and the second inspection well 6 are inserted into the cylinder 1 from the upper end to achieve communication. The setting of the first inspection well 5 and the second inspection well 6 facilitates workers to enter the cylinder 1 for maintenance.

[0025] The first inspection well 5 has a rainwater inlet 2 located at its center, which connects to the outlet of the rainwater diversion device. The rainwater diversion device adopts the pre-treatment rainwater device disclosed in patent CN201510591599.5. The second inspection well 6 has a rainwater outlet 3 located at its center, which connects to the inlet of the rainwater storage tank. Rainwater enters the cylinder 1 through the rainwater inlet 2, and after the removal of silt and suspended solids, it flows into the rainwater storage tank through the rainwater outlet 3.

[0026] This embodiment also includes a vertically arranged guide pipe 4, the upper part of which is located inside the second inspection well 6, and the lower part is located inside the cylinder 1. The upper end of the guide pipe 4 is higher than the rainwater outlet 3, and the lower end is located near the bottom of the cylinder 1.

[0027] With this configuration, after rainwater enters the cylinder 1, suspended solids are located at the liquid surface and silt is located at the bottom of the cylinder 1. Therefore, with the setting of the guide pipe 4, neither suspended solids nor silt will enter the guide pipe 4, thus making the rainwater discharged from the rainwater outlet 3 cleaner. The retention of suspended solids and silt inside the cylinder 1 can prevent these harmful substances from directly seeping into the ground, thereby effectively protecting the soil and groundwater from secondary pollution.

[0028] A vertically arranged buffer plate 7 is installed inside the first inspection well 5, directly facing the rainwater inlet 2. The buffer plate 7 absorbs the impact force of rainwater flowing in from the rainwater inlet 2, preventing damage to the first inspection well 5. The buffer plate 7 is installed using a snap-fit ​​method, specifically: the well wall of the first inspection well 5 has two symmetrically arranged slots, and the buffer plate 7 snaps into the slots, achieving a detachable connection and facilitating the replacement of the buffer plate 7.

[0029] An upward-extending baffle 8 is installed at the bottom of the cylinder 1, near the second inspection well 6. The lower end of the guide pipe 4 is positioned above or flush with the upper end of the baffle 8. The baffle 8 not only blocks sediment, preventing it from accumulating at the lower end of the guide pipe 4 and causing blockage, but also slows the flow, reducing the impact of the water flow on the guide pipe 4.

[0030] A mixer 9 is also installed at the bottom of the cylinder 1. The mixer 9 agitates the mud and sand at the bottom of the cylinder 1 to prevent the mud and sand from settling and clumping, which would make it difficult to clean. In this embodiment, a mud pump 11 is installed inside the cylinder 1 to remove mud and sand. A mud truck can also be used to remove mud and sand.

[0031] While cleaning up the mud and sand, the liquid level inside cylinder 1 will drop, and suspended solids can also be cleaned up at the same time.

[0032] 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 filtration and separation device for rainwater collection, characterized in that: It includes a cylinder (1), one end of which is provided with a rainwater inlet (2) connected to the outlet of the rainwater diversion device, and the other end is provided with a rainwater outlet (3) connected to the inlet of the rainwater storage tank; The rainwater outlet (3) is located near the top of the cylinder (1); The cylinder (1) is also provided with a guide pipe (4), the upper end of which is higher than the rainwater outlet (3).

2. The filtration and separation device for rainwater collection according to claim 1, characterized in that: The first inspection well (5) and the second inspection well (6) are led out from both ends of the cylinder (1).

3. A filtration and separation device for rainwater collection according to claim 2, characterized in that: The rainwater inlet (2) is located on the first inspection well (5), and the rainwater outlet (3) is located on the second inspection well (6); the upper part of the guide pipe (4) is located inside the second inspection well (6).

4. A filtration and separation device for rainwater collection according to claim 3, characterized in that: The first inspection well (5) is equipped with a buffer plate (7) facing the rainwater inlet (2).

5. A filtration and separation device for rainwater collection according to claim 4, characterized in that: An upwardly extending baffle (8) is provided at the bottom of the cylinder (1) near the second inspection well (6).

6. A filtration and separation device for rainwater collection according to claim 5, characterized in that: The lower end of the guide tube (4) is higher than the baffle (8) or flush with the upper end of the baffle (8).

7. A filtration and separation device for rainwater collection according to claim 1, characterized in that: A mixer (9) is also installed at the bottom of the cylinder (1).

8. A filtration and separation device for rainwater collection according to claim 1, characterized in that: The cylinder (1) is tubular, and its two ends are provided with sealing plates (10).

Images