Filtering device for urban rainwater collection

Abstract

This utility model belongs to the field of rainwater harvesting technology, and specifically relates to a filtration device for urban rainwater harvesting. It includes a filter tank and a motor. The filter tank has a slag discharge chamber at its upper interior and a drainage chamber at its lower right interior. An arc-shaped first filter plate is fixed to the inner top of the drainage chamber, with its upper surface matching the curvature of the inner surface of the slag discharge chamber. A motor is fixedly installed on the right side wall of the filter tank, and an auger is fixedly connected to the motor's output end. A docking assembly is fixed at the center of the bottom surface of the filter tank, and a filter barrel is fitted around the outside of the docking assembly. Nuts are annularly embedded and fixed to the outer top wall of the filter barrel, and each nut is threaded with a bolt. This utility model can achieve multi-layer filtration and purification of rainwater, resulting in better purification. Furthermore, the filter barrel of this device can be disassembled, facilitating the replacement of the filter material inside.

Description

Technical Field

[0001] This utility model belongs to the field of rainwater harvesting technology, and in particular relates to a filtration device for urban rainwater harvesting. Background Technology

[0002] Cities collect rainwater and then use filtration devices to purify it, so that the purified rainwater can be used to irrigate green plants and maintain roads.

[0003] Chinese utility model patent CN221557664U discloses a rainwater harvesting filter device for sponge cities. By inserting the filter plate into the limiting cover, it is not only convenient to disassemble the entire filter plate for maintenance or replacement, but also eliminates the need to disassemble and maintain the entire rainwater filtration device. Furthermore, since the water quality and flow rate of rainwater vary in different occasions and regions, the pore size and structure of the filter plate need to be adjusted according to the actual situation. The detachable filter plate can be replaced or adjusted according to actual needs to adapt to different water quality and flow rates.

[0004] Research revealed that the aforementioned devices are not ideal for quickly removing larger impurities such as gravel from rainwater. These impurities accumulate inside the device, causing blockages, reducing rainwater flow, and affecting filtration efficiency. Frequent cleaning is required, making operation inconvenient. Furthermore, these devices are not suitable for multi-layer filtration of rainwater, resulting in insufficient filtration and poor filtration effectiveness. Therefore, there is an urgent need to improve existing urban rainwater harvesting filtration devices and provide a new type of urban rainwater harvesting filtration device. Utility Model Content

[0005] The purpose of this utility model is to address the shortcomings of the existing technology by providing a reasonably designed, simple structure, easy-to-discharge urban rainwater collection filtration device with multi-layer filtration effect, thereby solving the problems existing in the prior art.

[0006] To achieve the above objectives, the present invention adopts the following technical solution:

[0007] A filtration device for urban rainwater harvesting includes a filter tank and a motor. The filter tank has a slag discharge chamber at its upper interior and a drainage chamber at its lower right interior. An arc-shaped first filter plate is fixed to the inner side of the top of the drainage chamber, with the upper surface of the first filter plate having the same curvature as the inner surface of the slag discharge chamber. A motor is fixedly installed on the right side wall of the filter tank, and an auger is fixedly connected to the output end of the motor. A docking assembly is fixed at the center of the bottom surface of the filter tank, and a filter bucket is fitted around the outside of the docking assembly. Nuts are annularly embedded and fixed to the outer top wall of the filter bucket, and bolts are threaded onto each nut. Multiple annular filter plates are equidistantly arranged on the inner side of the filter bucket, and a water outlet pipe is embedded and connected to the bottom right side wall of the filter bucket.

[0008] In a preferred embodiment, the slag discharge chamber is inclined with the left side higher than the right side. The slag discharge chamber is connected to the drainage chamber. The drainage chamber has a funnel-shaped structure and its bottom opening is located at the center of the bottom end face of the filter tank.

[0009] In a preferred embodiment, a water inlet pipe is embedded and fixed in the upper right corner of the filter tank, and the bottom end of the water inlet pipe is connected to the slag discharge chamber.

[0010] In a preferred embodiment, the docking assembly includes a fixing ring, a sealing gasket, and positioning grooves. The fixing ring is fixedly installed on the bottom end face of the filter tank, and the sealing gasket is bonded to the bottom end of the fixing ring. The sealing gasket is made of rubber, and multiple positioning grooves are formed in a ring on the outer periphery of the fixing ring.

[0011] In a preferred embodiment, the diameter of the through hole at the center of the fixing ring is equal to the diameter of the bottom opening of the drainage chamber, and the fixing ring and the filter barrel form a detachable structure.

[0012] In a preferred embodiment, the plurality of positioning grooves are provided in a one-to-one correspondence with the plurality of bolts, and the inner bottom surface of the positioning groove is inclined.

[0013] In a preferred embodiment, a storage chamber is formed between adjacent annular filter plates, and the storage chambers are spaced apart from the annular filter plates. The three storage chambers are filled with sand, PP cotton filter element and activated carbon particles in sequence from the inside to the outside.

[0014] In a preferred embodiment, the water outlet pipe is inclined and a second filter plate is fixedly installed on the inner side of the end closest to the filter barrel.

[0015] Compared with the prior art, the beneficial effects of this utility model are as follows:

[0016] In the solution of this utility model:

[0017] Rainwater is fed into the filter tank through the inlet pipe. The first filter plate can intercept larger impurities in the rainwater. The rainwater can then enter the filter bucket through the drain chamber. At the same time, the motor is turned on to control the auger to rotate, which can slowly push the impurities intercepted above the first filter plate to the left along the slag discharge chamber. This can directly discharge larger impurities from the filter tank, ensuring smooth rainwater flow and eliminating the need for frequent manual cleaning. In addition, the slag discharge chamber is inclined to prevent rainwater from flowing out of the device.

[0018] Multiple annular filter plates form multiple storage chambers. Sand, PP cotton filter elements, and activated carbon particles are filled into these chambers sequentially from the inside out. When rainwater enters the filter barrel, it flows through the multiple storage chambers sequentially from the inside out, thus achieving multi-layer filtration and purification of rainwater for better purification. Finally, the rainwater is discharged and collected through the outlet pipe. Moreover, the filter barrel of this device can be disassembled, making it easy to replace the filter materials inside. Attached Figure Description

[0019] To more clearly illustrate the technical solutions in the embodiments of this utility model or the prior art, the drawings used in the description of the embodiments or the prior art will be briefly introduced below. The drawings are described as follows:

[0020] Figure 1 This is a three-dimensional front view structural diagram of the present invention;

[0021] Figure 2 This is a front view cross-sectional structural diagram of the filter tank of this utility model;

[0022] Figure 3 This utility model Figure 2 Enlarged structural diagram at point A in the middle;

[0023] Figure 4 This is a top cross-sectional view of the fixing ring and bolt of this utility model.

[0024] Figure 5 This is a top view of the filter barrel and annular filter plate of this utility model.

[0025] Figure 6 This is a front view cross-sectional structural diagram of the water outlet pipe and the second filter plate of this utility model.

[0026] In the picture:

[0027] 1. Filter tank; 2. Slag discharge chamber; 3. Drainage chamber; 4. First filter plate; 5. Motor; 6. Screw conveyor; 7. Water inlet pipe; 8. Connecting assembly; 81. Fixing ring; 82. Sealing gasket; 83. Positioning groove; 9. Filter barrel; 10. Nut; 11. Bolt; 12. Annular filter plate; 13. Material storage chamber; 14. Water outlet pipe; 15. Second filter plate. Detailed Implementation

[0028] The embodiments described below are merely some embodiments of the present invention and do not represent all embodiments consistent with the present invention. Exemplary embodiments will now be described with reference to the accompanying drawings:

[0029] like Figure 1-6 As shown, the present invention relates to a filtration device for urban rainwater collection, comprising a filter tank 1 and a motor 5. The filter tank 1 has a slag discharge chamber 2 inside its upper end and a drainage chamber 3 inside its lower right side. An arc-shaped first filter plate 4 is fixed to the inner side of the top of the drainage chamber 3. The upper end surface of the first filter plate 4 has the same curvature as the inner surface of the slag discharge chamber 2. The motor 5 is fixedly installed on the right side wall of the filter tank 1. The output end of the motor 5 is fixedly connected to an auger 6. A docking assembly 8 is fixed at the center of the bottom end face of the filter tank 1. A filter barrel 9 is sleeved on the outside of the docking assembly 8. Nuts 10 are fixedly embedded in the outer wall of the top of the filter barrel 9 in a ring shape. Each nut 10 is threaded with a bolt 11. Multiple annular filter plates 12 are arranged at equal intervals on the inner side of the filter barrel 9. A water outlet pipe 14 is embedded and connected to the bottom right side wall of the filter barrel 9.

[0030] Based on the above structure, the slag discharge chamber 2 is set in an inclined shape with the left side higher than the right side. The slag discharge chamber 2 is connected to the drainage chamber 3. The drainage chamber 3 has a funnel-shaped structure and its bottom opening is located at the center of the bottom end face of the filter tank 1.

[0031] In this embodiment, the drainage chamber 3 facilitates the discharge of pre-filtered rainwater into the filter bucket 9 for further purification.

[0032] Based on the above structure, a water inlet pipe 7 is fixedly embedded in the upper right side of the filter tank 1, and the bottom end of the water inlet pipe 7 is connected to the slag discharge chamber 2.

[0033] In this embodiment, the water inlet pipe 7 facilitates the input of rainwater into the filter tank 1 for filtration and purification.

[0034] Based on the above structure, the docking assembly 8 includes a fixing ring 81, a sealing gasket 82, and a positioning groove 83. The fixing ring 81 is fixedly installed on the bottom end face of the filter tank 1. The sealing gasket 82 is bonded to the bottom end of the fixing ring 81. The sealing gasket 82 is made of rubber. Multiple positioning grooves 83 are provided in a ring on the outer wall of the peripheral side of the fixing ring 81.

[0035] In this embodiment, a rubber sealing gasket 82 is used to facilitate a sealing connection between the fixing ring 81 and the filter barrel 9, thus preventing water leakage.

[0036] Based on the above structure, the diameter of the through hole at the center of the fixing ring 81 is equal to the diameter of the bottom opening of the drainage chamber 3, and the fixing ring 81 and the filter barrel 9 form a disassembly structure.

[0037] In this embodiment, by disassembling the filter cartridge 9, it is easy to replace the filter material filled inside it.

[0038] Based on the above structure, multiple positioning grooves 83 are arranged in a one-to-one correspondence with multiple bolts 11, and the inner bottom surface of the positioning groove 83 is inclined.

[0039] In this embodiment, when the bolt 11 is tightened to allow it to slide, the end of the bolt 11 can press against the inclined inner bottom surface of the positioning groove 83, thereby facilitating the application of an upward pulling force to the filter barrel 9 and facilitating the effective sealing between the filter barrel 9 and the fixing ring 81 by the sealing gasket 82.

[0040] Based on the above structure, a storage chamber 13 is formed between adjacent annular filter plates 12. The storage chamber 13 and the annular filter plates 12 are arranged in an alternating manner. The three storage chambers 13 are filled with sand, PP cotton filter element and activated carbon particles from the inside to the outside.

[0041] In this embodiment, after rainwater enters the filter bucket 9, it flows from the inside out through multiple storage chambers 13. By utilizing multi-layer filter materials, multi-layer filtration and purification of rainwater can be achieved, resulting in better purification.

[0042] Based on the above structure, the water outlet pipe 14 is inclined and a second filter plate 15 is fixedly installed on the inner side of the end near the filter barrel 9.

[0043] In this embodiment, the outlet pipe 14 facilitates the discharge of purified rainwater, and the second filter plate 15 prevents filter material from entering the outlet pipe 14 with the rainwater.

[0044] The working principle of this utility model is as follows:

[0045] In use, rainwater is first sent into the filter tank 1 through the inlet pipe 7. The first filter plate 4 intercepts larger impurities in the rainwater. At the same time, the motor 5 is turned on to control the auger 6 to rotate at a constant speed. This will slowly push the impurities intercepted above the first filter plate 4 to the left along the slag discharge chamber 2, and directly discharge the larger impurities from the filter tank 1. This not only ensures that the rainwater flows in smoothly, but also eliminates the need for frequent manual cleaning. In addition, the slag discharge chamber 2 is inclined, which can prevent rainwater from flowing out of the device.

[0046] After being initially filtered by the first filter plate 4, the rainwater can enter the filter bucket 9 through the drainage chamber 3 and the fixing ring 81. At this time, the rainwater will flow from the inside to the outside through multiple annular filter plates 12 and the storage chamber 13. The filter material filled in the multiple storage chambers 13 can achieve multi-layer filtration and purification of the rainwater, resulting in better purification. Finally, the rainwater can be discharged and collected through the outlet pipe 14.

[0047] The filter cartridge 9 of this device can be disassembled, making it easy to replace the filter material inside. When installing the filter cartridge 9, the top of the filter cartridge 9 can be first fitted onto the outside of the fixing ring 81, and the multiple bolts 11 can be aligned with the multiple positioning grooves 83 respectively. Then, when the bolts 11 are tightened with a wrench or other tools, the bolts 11 slide relative to the nut 10 and can press the inclined inner bottom surface of the positioning groove 83, thereby making it easy to apply an upward pulling force to the filter cartridge 9. This facilitates the effective sealing between the filter cartridge 9 and the fixing ring 81 through the sealing gasket 82, preventing water leakage.

[0048] The above are merely preferred embodiments of this utility model and are not intended to limit the scope of protection of this utility model. Any equivalent changes, modifications, substitutions, and variations made by those skilled in the art based on the concept of this utility model and on the basis of existing technology through logical analysis, reasoning, or limited experiments shall be within the scope of protection defined by the claims.

Claims

1. A filtering device for urban rainwater collection comprising a filtering tank (1) and an electric motor (5), characterized in that: The filter tank (1) has a slag discharge chamber (2) inside its upper end and a drainage chamber (3) inside its lower right side. An arc-shaped first filter plate (4) is fixed inside the top of the drainage chamber (3). The upper surface of the first filter plate (4) is consistent with the curvature of the inner surface of the slag discharge chamber (2). A motor (5) is fixedly installed on the right side wall of the filter tank (1). An auger (6) is fixedly connected to the output end of the motor (5). A docking assembly (8) is fixed at the center of the bottom surface of the filter tank (1). A filter bucket (9) is sleeved on the outside of the docking assembly (8). Nuts (10) are fixedly embedded in the top outer wall of the filter bucket (9). Each nut (10) is threaded with a bolt (11). Multiple annular filter plates (12) are equidistantly arranged inside the filter bucket (9). A water outlet pipe (14) is embedded and connected to the bottom right side wall of the filter bucket (9).

2. The filtering device for urban rainwater collection according to claim 1, characterized in that: The slag discharge chamber (2) is inclined with the left side higher than the right side. The slag discharge chamber (2) is connected to the drainage chamber (3). The drainage chamber (3) has a funnel-shaped structure and its bottom opening is located at the center of the bottom end face of the filter tank (1).

3. The filtering device for urban rainwater collection according to claim 1, characterized in that: The filter tank (1) is fixedly fitted with a water inlet pipe (7) on the upper right side, and the bottom end of the water inlet pipe (7) is connected to the slag discharge chamber (2).

4. The filtering device for urban rainwater collection according to claim 2, characterized in that: The docking assembly (8) includes a fixing ring (81), a sealing gasket (82), and a positioning groove (83). The fixing ring (81) is fixedly installed on the bottom end face of the filter tank (1). The sealing gasket (82) is bonded to the bottom end of the fixing ring (81). The sealing gasket (82) is made of rubber. Multiple positioning grooves (83) are provided in a ring on the outer periphery of the fixing ring (81).

5. The filtering device for urban rainwater collection according to claim 4, characterized in that: The diameter of the through hole at the center of the fixing ring (81) is equal to the diameter of the bottom opening of the drainage chamber (3), and the fixing ring (81) and the filter barrel (9) form a disassembly structure.

6. The filtering device for urban rainwater collection according to claim 5, characterized in that: The multiple positioning grooves (83) are arranged in a one-to-one correspondence with the multiple bolts (11), and the inner bottom surface of the positioning grooves (83) is inclined.

7. The filtering device for urban rainwater collection according to claim 1, characterized in that: A storage chamber (13) is formed between adjacent annular filter plates (12). The storage chamber (13) and the annular filter plates (12) are arranged in an alternating manner. The three storage chambers (13) are filled with sand, PP cotton filter element and activated carbon particles in sequence from the inside to the outside.

8. The filtering device for urban rainwater collection according to claim 1, characterized in that: The water outlet pipe (14) is inclined and a second filter plate (15) is fixedly installed on the inner side of the end near the filter bucket (9).

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