Sponge city rainwater retention and purification device

Abstract

A rainwater retention and purification device for sponge cities effectively solves the problem of impurities adhering to filter screens. It includes a retention tank, a filter tank, a buffer tank, and a purification tank. A water pump is located at the bottom of the retention tank, connected to the inlet at the top of the filter tank. A filter screen is installed inside the filter tank, capable of rising and falling within the tank. An activated carbon layer is located at the bottom of the filter screen, and a zeolite filter media layer is located below the activated carbon layer. The bottom of the filter tank is connected to the buffer tank, and the top of the buffer tank is connected to the purification tank. A first water pressure sensor is located at the bottom of the filter tank, and a second water pressure sensor is located at the bottom of the buffer tank. A suction pump is located at the top of the filter tank. When the first water pressure sensor detects a water pressure greater than that of the second water pressure sensor, the filter screen rises, and the suction pump activates, drawing the impurities adhering to the filter screen out of the filter tank. This invention features a simple and ingenious structure, is easy to use, and can suction away impurities adhering to the filter screen, maintaining the filter screen's filtration efficiency while preventing bacterial growth and protecting water quality.

Description

Technical Field

[0001] This utility model relates to the field of rainwater purification technology, and in particular to a rainwater retention and purification device for sponge cities. Background Technology

[0002] In modern urban construction, the sponge city system is a way to collect and utilize rainwater and comprehensively utilize water resources. By collecting and treating rainwater, water can be reused, which is beneficial to the protection of water resources.

[0003] In existing sponge city systems, rainwater needs to be filtered after it is retained. However, the impurities filtered out often adhere to the filter screen, which can breed bacteria and affect water quality and the reuse of rainwater over time. Utility Model Content

[0004] To overcome the shortcomings of existing technologies, this utility model provides a rainwater retention and purification device for sponge cities, which effectively solves the problem of impurities adhering to the filter screen.

[0005] The technical solution to the problem is as follows: a rainwater retention and purification device for sponge cities, comprising a retention tank, a filtration tank, a buffer tank, and a purification tank. A water pump is installed at the bottom of the retention tank, and the water pump is connected to the water inlet at the top of the filtration tank. A filter screen is installed inside the filtration tank, and the filter screen can rise and fall within the filtration tank. An activated carbon layer is installed at the bottom of the filter screen, and a zeolite filter media layer is installed at the bottom of the activated carbon layer. The bottom of the filtration tank is connected to the buffer tank, and the top of the buffer tank is connected to the purification tank. A first water pressure sensor is installed at the bottom of the filtration tank, and a second water pressure sensor is installed at the bottom of the buffer tank. A suction pump is installed at the top of the filtration tank. When the first water pressure sensor detects that the water pressure is greater than the value of the second water pressure sensor, the filter screen rises, the suction pump starts, and the impurities attached to the top of the filter screen are extracted from the filtration tank.

[0006] Preferably, the top of the filter tank is provided with a first hydraulic cylinder, the extension rod of the first hydraulic cylinder is rotatably connected to the filter screen, and the first hydraulic cylinder controls the lifting and lowering of the filter screen.

[0007] Preferably, a bevel gear ring is provided on the outer side of the filter screen, and a motor is telescopically installed on the outer side of the top of the filter tank. A bevel gear that meshes with the bevel gear ring is fixed on the output shaft of the motor.

[0008] Preferably, the filter tank is externally connected to a fixing plate via a second hydraulic cylinder, and the motor is mounted on the fixing plate.

[0009] Preferably, the top of the filter tank is provided with a suction pipe connected to a suction pump, and the bottom of the suction pipe is open. When the bevel gear ring meshes with the bevel gear, the filter screen is located at the bottom of the suction pipe.

[0010] This utility model has a simple and ingenious structure and is easy to use. It can suck up the substances attached to the filter screen and remove them from the filter screen, maintaining the filtration efficiency of the filter screen while avoiding the growth of bacteria and protecting the water quality. Attached Figure Description

[0011] Figure 1 This is a schematic diagram of the structure of a rainwater retention and purification device for sponge cities according to this utility model.

[0012] Figure 2 This utility model relates to a rainwater retention and purification device for sponge cities. Figure 1 Enlarged structural diagram at point A in the middle.

[0013] Figure 3 This utility model relates to a rainwater retention and purification device for sponge cities. Figure 1 Enlarged structural diagram at point B. Detailed Implementation

[0014] The specific embodiments of this utility model will be further described in detail below with reference to the accompanying drawings.

[0015] Depend on Figures 1 to 3 It is known that a sponge city rainwater retention and purification device includes a retention tank 1, a filter tank 2, a buffer tank 3, and a purification tank 4. A water pump 5 is installed at the bottom of the retention tank 1, and the water pump 5 is connected to the water inlet at the top of the filter tank 2. A filter screen 6 is installed inside the filter tank 2, and the filter screen 6 can rise and fall within the filter tank 2. An activated carbon layer 7 is installed at the bottom of the filter screen 6, and a zeolite filter media layer 8 is installed at the bottom of the activated carbon layer 7. The bottom of the filter tank 2 is connected to the buffer tank 3, and the top of the buffer tank 3 is connected to the purification tank 4. A first water pressure sensor 9 is installed at the bottom of the filter tank 2, and a second water pressure sensor 10 is installed at the bottom of the buffer tank 3. A suction pump 11 is installed at the top of the filter tank 2. When the first water pressure sensor 9 detects that the water pressure is greater than the value of the second water pressure sensor 10, the filter screen 6 rises, and the suction pump 11 starts to extract the impurities attached to the top of the filter screen 6 from the filter tank 2.

[0016] In practical use, this utility model The rainwater collected in the sponge city enters the retention tank 1, is pumped into the filtration tank 2 by the water pump 5, and then passes through the filter screen 6, the activated carbon layer 7 and the zeolite filter media layer 8 in sequence. It then enters the buffer tank 3 from the bottom of the filtration tank 2. When the water level in the buffer tank 3 reaches a certain height, it enters the purification tank 4 for collection.

[0017] The first water pressure sensor 9 at the bottom of filter tank 2 and the second water pressure sensor 10 at the bottom of buffer tank 3 are at the same height, and the bottoms of filter tank 2 and buffer tank 3 are connected, exhibiting the principle of communicating vessels. The water levels in filter tank 2 and buffer tank 3 should be the same, and the values ​​of the first water pressure sensor 9 and the second water pressure sensor 10 should be equal. When there are many impurities attached to filter screen 6, resulting in low filtration efficiency, rainwater above filter tank 2 cannot pass through filter screen 6 to enter buffer tank 3, causing the value of the first water pressure sensor 9 to be greater than the value of the second water pressure sensor 10. At this time, the suction pump 11 is started, and the filter screen 6 moves upward to complete the suction of impurities on filter screen 6. After the suction is completed, the water pressure in filter tank 2 and buffer tank 3 can be balanced. If they are still not balanced, an alarm is triggered, and manual cleaning is required.

[0018] A first hydraulic cylinder 12 is provided at the top of the filter tank 2. The telescopic rod of the first hydraulic cylinder 12 is rotatably connected to the filter screen 6. The first hydraulic cylinder 12 controls the lifting and lowering of the filter screen 6. A bevel gear ring 13 is provided on the outside of the filter screen 6. A motor 14 is telescopically installed on the outside of the top of the filter tank 2. A bevel gear 15 that meshes with the bevel gear ring 13 is fixed on the output shaft of the motor 14. A fixing plate 17 is connected to the outside of the filter tank 2 via a second hydraulic cylinder 16. The motor 14 is mounted on the fixing plate 17. A suction pipe 18 connected to the suction pump 11 is provided at the top of the filter tank 2. The bottom of the suction pipe 18 is open. When the bevel gear ring 13 meshes with the bevel gear 15, the filter screen 6 is located at the bottom of the suction pipe 18.

[0019] The first hydraulic cylinder 12 drives the filter screen 6 to rise and fall. When the filter screen 6 rises to the position where the bevel gear ring 13 and bevel gear 15 mesh, the first hydraulic cylinder 12 remains stationary. The second hydraulic cylinder 16 pushes the fixed plate 17 to make the bevel gear 15 mesh with the bevel gear ring 13. The motor 14 starts and drives the bevel gear 15 to rotate. The bevel gear ring 13 causes the filter screen 6 to rotate. The suction pump 11 sucks the filter screen 6 through the suction pipe 16. The open structure at the bottom of the suction pipe 16 makes it easy for debris on the filter screen 6 to be sucked away.

[0020] In this device, the bevel gear ring 13 is located at the bottom of the filter screen 6 and is isolated by a rubber partition to prevent debris from entering, so that the bevel gear ring 13 can smoothly mesh with the bevel gear 15.

[0021] The device also includes a control system, which is electrically connected to the first water pressure sensor 9, the second water pressure sensor 10, the suction pump 11, the first hydraulic cylinder 12, the second hydraulic cylinder 16, and the motor 14. The control system monitors the electrical signals transmitted by the first water pressure sensor 9 and the second water pressure sensor 10. When the value on the first water pressure sensor 9 is greater than the value on the second water pressure sensor 10, the control system controls the first hydraulic cylinder 12 to contract and drive the filter screen 6 to rise. After reaching the designated position, the second hydraulic cylinder 16 extends, so that the bevel gear ring 13 meshes with the bevel gear 15. The motor 14 and the suction pump 11 start simultaneously to suck up the debris on the filter screen 6.

[0022] Since the sponge city has already filtered out larger debris such as leaves and garbage when collecting rainwater, filter screen 6 is used to filter smaller particles and some insect eggs, activated carbon layer 7 filters heavy metals, and zeolite filter media layer 8 filters ammonia nitrogen, etc. Small particles and insect eggs on filter screen 6 can easily breed bacteria and reproduce insect eggs, which can pollute the water quality while clogging filter screen 6. Therefore, suction pump 11 is used to remove them to ensure water quality.

[0023] Compared with the prior art, this utility model has the following advantages: it can clean the deposits on the filter screen, prevent bacterial growth, and ensure water quality safety.

Claims

1. A rainwater retention and purification device for sponge cities, characterized in that, The system includes a retention tank (1), a filter tank (2), a buffer tank (3), and a purification tank (4). A water pump (5) is installed at the bottom of the retention tank (1), and the water pump (5) is connected to the water inlet at the top of the filter tank (2). A filter screen (6) is installed inside the filter tank (2), and the filter screen (6) can rise and fall within the filter tank (2). An activated carbon layer (7) is installed at the bottom of the filter screen (6), and a zeolite filter media layer (8) is installed at the bottom of the activated carbon layer (7). The bottom of the filter tank (2) is connected to the buffer tank (3), and the top of the buffer tank (3) is connected to the purification tank (4). A first water pressure sensor (9) is installed at the bottom of the filter tank (2), and a second water pressure sensor (10) is installed at the bottom of the buffer tank (3). A suction pump (11) is installed at the top of the filter tank (2). When the first water pressure sensor (9) detects that the water pressure is greater than the value of the second water pressure sensor (10), the filter screen (6) rises, and the suction pump (11) starts to extract the impurities attached to the top of the filter screen (6) from the filter tank (2).

2. The sponge city rainwater retention and purification device according to claim 1, characterized in that, The filter pool (2) is equipped with a first hydraulic cylinder (12) at the top. The telescopic rod of the first hydraulic cylinder (12) is rotatably connected to the filter screen (6). The first hydraulic cylinder (12) controls the lifting and lowering of the filter screen (6).

3. The sponge city rainwater retention and purification device according to claim 1, characterized in that, The filter screen (6) is provided with a bevel gear ring (13) at the bottom of the outer side, and a motor (14) is provided on the top outer side of the filter tank (2). A bevel gear (15) that meshes with the bevel gear ring (13) is fixed on the output shaft of the motor (14).

4. The sponge city rainwater retention and purification device according to claim 3, characterized in that, The filter pool (2) is connected to a fixed plate (17) via a second hydraulic cylinder (16), and the motor (14) is mounted on the fixed plate (17).

5. The sponge city rainwater retention and purification device according to claim 1, characterized in that, The filter tank (2) is provided with a suction pipe (18) connected to the suction pump (11) at the top. The bottom of the suction pipe (18) is open. When the bevel gear ring (13) meshes with the bevel gear (15), the filter screen (6) is located at the bottom of the suction pipe (18).

Images