Rainwater collecting cistern
The filter screen is cleaned by a motor-driven threaded rod and a cleaning frame. Combined with a detachable mounting frame structure, the problem of filter screen clogging is solved, ensuring the efficient operation of the rainwater harvesting system and the quality of water.
Patent Information
- Authority / Receiving Office
- CN · China
- Patent Type
- Utility models(China)
- Current Assignee / Owner
- Filing Date
- 2025-04-29
- Publication Date
- 2026-04-07
AI Technical Summary
As impurities accumulate, the filter screens of existing rainwater harvesting cisterns become clogged, reducing filtration efficiency and allowing fine impurities to enter the cisterns and affect water quality.
A filtration system with a motor-driven threaded rod and a cleaning frame was designed. Impurities are cleaned by a brush, and the detachable mounting frame structure facilitates the cleaning and inspection of the filter screen.
It effectively prevents impurities from accumulating, maintains the filtration performance of the filter screen, extends its service life, ensures that rainwater enters the cellar cleanly, improves collection efficiency, and reduces maintenance costs.
Smart Images

Figure CN224092607U_ABST
Abstract
Description
Technical Field
[0001] This utility model relates to the field of water collection device technology, specifically to rainwater collection cisterns. Background Technology
[0002] Water cellars are well-shaped structures dug underground in arid and semi-arid regions where the soil layer is relatively thick. They are used to store surface runoff and solve the problem of water supply for people and livestock and irrigation for farmland. They are also known as dry wells. Water cellars are often built in places where water sources are scarce and soil erosion is severe. They are important facilities for water storage and soil conservation on slopes.
[0003] A search revealed a Chinese patent publication number: CN215630340U, which provides a rainwater collection device for forest fire prevention. This patent facilitates the cleaning and maintenance of the filter screen by setting up a ladder and a handle on the filter plate.
[0004] While the aforementioned patents facilitate the cleaning and maintenance of the filter screen, the device still has the following problems: as rainwater continues to flow in, impurities accumulate on the filter screen. Since it cannot be cleaned simultaneously, the impurities gradually clog the mesh of the filter screen, causing the effective filtration area of the filter screen to continuously decrease, thereby reducing the filtration efficiency. Fine impurities that could originally be intercepted may also enter the water cellar with the water flow, affecting the water quality of the water cellar. In view of the above situation, technological innovation is carried out on the basis of the existing device. Utility Model Content
[0005] The purpose of this invention is to provide a rainwater collection cistern to solve the problems mentioned in the background art: as rainwater flows in continuously, impurities on the filter screen will accumulate more and more. Since it cannot be cleaned, the impurities will gradually clog the mesh of the filter screen, causing the effective filtration area of the filter screen to continuously decrease, thereby reducing the filtration efficiency. Fine impurities that could originally be intercepted may also enter the cistern with the water flow, affecting the water quality of the cistern.
[0006] To achieve the above objectives, this utility model provides the following technical solution: a rainwater collection cistern, comprising a cistern body, a support base on the surface of the cistern body, four fixing blocks fixedly connected to the bottom of the support base, a connecting rod fixedly connected to one side of each fixing block, a slot on the surface of each connecting rod, an installation frame on the top of the support base, a filter screen inside the installation frame, a protective groove inside the installation frame, a motor fixedly connected inside the protective groove, a sliding groove inside the installation frame, a threaded rod rotatably connected inside the sliding groove, the output end of the motor rotatably passing through the interior of the protective groove and extending into the interior of the sliding groove, the output end of the motor being fixedly connected to one end of the threaded rod via a coupling, a sweeping frame threadedly connected to the surface of the threaded rod, the surface of the sweeping frame slidingly connected to the interior of the sliding groove, a brush at the bottom of the sweeping frame, functional frames fixedly connected to both sides of the installation frame, a connecting groove at the bottom of each functional frame, the interior of the connecting groove slidingly connected to the surface of the connecting rod.
[0007] Preferably, both sides of the cleaning frame are fixedly connected with corrugated sleeves that are movably sleeved on the threaded rod. The side of the corrugated sleeve away from the filter screen is fixedly connected to the inner wall of the slide groove. The functional frame has a limiting groove inside, the limiting groove has a Z-shaped cross section, and two fixing plates are slidably connected inside the limiting groove.
[0008] Preferably, a gear is rotatably connected inside the limiting groove. The gear is disposed between two fixed plates. The fixed plates are provided with teeth on the side near the gear. The fixed plates are meshed with the surface of the gear through the teeth. A rotating rod is fixedly connected to one end of the gear.
[0009] Preferably, a first spring is fixedly connected inside the limiting groove, and one end of the first spring near the fixing plate is fixedly connected to the surface of the fixing plate, and the side of the fixing plate near the slot is inserted into the inside of the slot.
[0010] Preferably, a functional block is fixedly installed on the surface of the functional frame, a fixing groove is provided on one side of the functional block, the fixing groove has a cross-shaped cross section, and a through groove is provided inside the functional block, the inside of the through groove communicating with the inside of the fixing groove.
[0011] Preferably, one end of the rotating rod rotatably passes through the interior of the functional frame and extends into the interior of the through slot, and one end of the rotating rod is provided with a cylinder.
[0012] Preferably, a pull plate is fixedly connected to one end of the cylinder near the rotating rod, and a groove is formed inside the rotating rod. The surface of the pull plate is slidably connected to the inside of the groove, and both the pull plate and the groove have square cross-sections.
[0013] Preferably, a second spring is fixedly connected inside the groove, with one end of the second spring near the pull plate being fixedly connected to the surface of the pull plate, and a handle is fixedly connected to the end of the cylinder away from the rotating rod, with the surface of the handle being slidably connected to the inside of the fixed groove.
[0014] Compared with the prior art, the beneficial effects of this utility model are:
[0015] 1. This rainwater harvesting cistern operates by having a motor started by staff. The motor drives a threaded rod, which in turn moves a sweeping frame. Simultaneously, the sweeping frame moves a brush, cleaning debris and impurities from the filter screen. This cleaning prevents excessive accumulation of impurities on the filter screen, ensuring its continuous and effective interception of leaves, branches, mud, and other impurities from rainwater. This maintains good filtration performance, keeping the rainwater entering the cistern relatively clean, thus extending the filter screen's lifespan, saving on replacement costs and time, making the rainwater harvesting process smoother, reducing collection failures caused by filter screen problems, ensuring timely and sufficient rainwater collection, and improving the overall performance and efficiency of the rainwater harvesting system.
[0016] 2. This rainwater harvesting cistern operates by having a worker pull a handle. The handle rotates a cylinder, which in turn rotates a pull plate. This pull plate then rotates a rotating rod, which in turn rotates a gear. The gear, through its meshing with teeth, moves a fixed plate, causing it to slide out of its slot. By installing and removing the mounting frame, the filter screen can be replaced and thoroughly cleaned, removing stubborn stains and impurities that are difficult to remove during routine cleaning, restoring the filter screen to its optimal filtration performance. This also facilitates a detailed inspection of the filter screen itself, allowing for the timely detection of potential damage or aging, enabling repair or replacement, reducing maintenance and replacement costs, and ensuring the normal operation of the rainwater harvesting system. Attached Figure Description
[0017] Figure 1 This is a schematic diagram of the structure of the rainwater harvesting cisterns of this utility model;
[0018] Figure 2 This is a schematic diagram of the functional frame of this utility model;
[0019] Figure 3 This is a schematic diagram of the structure of the functional block of this utility model;
[0020] Figure 4 This is a schematic diagram of the connecting rod of this utility model;
[0021] Figure 5 This is a schematic diagram of the structure of the filter screen of this utility model;
[0022] Figure 6 This is a schematic diagram of the threaded rod of this utility model.
[0023] In the diagram: 1. Water collection cellar body; 2. Support base; 3. Mounting frame; 4. Filter screen; 5. Through groove; 6. Slide groove; 7. Corrugated sleeve; 8. Cleaning frame; 9. Functional frame; 10. Slot; 11. Fixing groove; 12. Fixing block; 13. Connecting groove; 14. Connecting rod; 15. Limiting groove; 16. Fixing plate; 17. First spring; 18. Protective groove; 19. Motor; 20. Gear; 21. Rotating rod; 22. Pull groove; 23. Second spring; 24. Pull plate; 25. Cylinder; 26. Handle; 27. Functional block; 28. Threaded rod. Detailed Implementation
[0024] Please see Figure 1-6 This utility model provides a technical solution: a rainwater harvesting cistern, including a cistern body 1. A support base 2 is provided on the surface of the cistern body 1. Four fixing blocks 12 are fixedly connected to the bottom of the support base 2. A connecting rod 14 is fixedly connected to one side of each fixing block 12. A slot 10 is provided on the surface of the connecting rod 14. A mounting frame 3 is provided on the top of the support base 2. The interior of the mounting frame 3 is hollow. A filter screen 4 is provided inside the mounting frame 3 to block and filter impurities in the rainwater. A cleaning port is provided on one side of the mounting frame 3, through which cleaned debris can be discharged. A protective groove 18 is provided inside the mounting frame 3. A motor 19 is fixedly connected inside the protective groove 18. The motor 19 is an existing structure and will not be described in detail here. The motor 19 is also equipped with connecting wires, power supply, controller, etc., which are not the main structure and will not be described in detail here. The mounting frame 3 has a sliding groove 6 inside, and a threaded rod 28 is rotatably connected inside the sliding groove 6. The output end of the motor 19 rotates through the interior of the protective groove 18 and extends into the interior of the sliding groove 6. The output end of the motor 19 is fixedly connected to one end of the threaded rod 28 through a coupling. A cleaning frame 8 is threadedly connected to the surface of the threaded rod 28. Corrugated sleeves 7 are fixedly connected to both sides of the cleaning frame 8 and are movably sleeved on the threaded rod 28. The side of the corrugated sleeve 7 away from the filter screen 4 is fixedly connected to the interior of the sliding groove 6. The surface of the cleaning frame 8 is slidably connected to the interior of the sliding groove 6. A brush is provided at the bottom of the cleaning frame 8, which can clean the surface of the filter screen 4.
[0025] When the operator starts the motor 19, the motor 19 drives the threaded rod 28 to rotate, which in turn moves the sweeping frame 8. Simultaneously, the sweeping frame 8 moves the brush, thus cleaning the debris and impurities on the surface of the filter screen 4. Cleaning the filter screen 4 prevents excessive accumulation of impurities, ensuring its continuous and effective interception of various impurities such as leaves, branches, and mud in rainwater, maintaining good filtration performance, and keeping the rainwater entering the water cellar relatively clean. This extends the service life of the filter screen 4, saves the cost and time of replacing it, makes the rainwater collection process smoother, reduces collection failures caused by problems with the filter screen 4, ensures that the water cellar can collect rainwater in a timely and sufficient manner, and improves the overall performance and efficiency of the rainwater collection system.
[0026] The two sides of the mounting frame 3 are fixedly connected to the functional frame 9. The cross section of the functional frame 9 is U-shaped. The functional frame 9 consists of two vertical plates and one horizontal plate. The bottom of the functional frame 9 is provided with a connecting groove 13. The interior of the connecting groove 13 is slidably connected to the surface of the connecting rod 14.
[0027] The functional frame 9 has a limiting groove 15 inside, and the cross-section of the limiting groove 15 is Z-shaped. Two fixed plates 16 are slidably connected inside the limiting groove 15, and a gear 20 is rotatably connected inside the limiting groove 15. The gear 20 is located between the two fixed plates 16. The side of the fixed plate 16 near the gear 20 is provided with teeth. The fixed plate 16 is meshed with the surface of the gear 20 through the teeth. One end of the gear 20 is fixedly connected to a rotating rod 21. A first spring 17 is fixedly connected inside the limiting groove 15. The end of the first spring 17 near the fixed plate 16 is fixedly connected to the surface of the fixed plate 16. The fixed plate 16 can compress and reset the first spring 17. The side of the fixed plate 16 near the slot 10 is inserted into the inside of the slot 10.
[0028] Functional blocks 27 are fixedly mounted on the surface of functional frame 9. A fixing groove 11 is provided on one side of functional block 27. The cross-section of fixing groove 11 is cross-shaped. A through groove 5 is provided inside functional block 27. The inside of through groove 5 communicates with the inside of fixing groove 11. One end of rotating rod 21 rotates through the inside of functional frame 9 and extends into the inside of through groove 5. A cylinder 25 is provided at one end of rotating rod 21. A pull plate 24 is fixedly connected to the end of cylinder 25 near rotating rod 21. A pull groove 22 is provided inside rotating rod 21. The surface of pull plate 24 is slidably connected to the inside of pull groove 22. A second spring 23 is fixedly connected inside pull groove 22. The end of second spring 23 near pull plate 24 is fixedly connected to the surface of pull plate 24. Second spring 23 can be compressed and reset by the movement of pull plate 24. A handle 26 is fixedly connected to the end of cylinder 25 away from rotating rod 21. The surface of handle 26 is slidably connected to the inside of fixing groove 11.
[0029] When the operator pulls handle 26, handle 26 moves cylinder 25, which in turn moves pull plate 24, causing handle 26 to slide out of the fixing groove 11. Rotating handle 26 then rotates cylinder 25, which in turn rotates pull plate 24, which in turn rotates rotating rod 21. Rotating rod 21 then rotates gear 20. Gear 20, through meshing with teeth, moves fixing plate 16, causing it to slide out of slot 10. At this point, handle 26 slides back into the fixing groove 11, fixing plate 16 in place and allowing the operator to fix the other side. Plate 16 slides out of slot 10, at which point mounting frame 3 can be removed. To fix mounting frame 3, pull handle 26 and rotate it in the opposite direction to insert fixing plate 16 into slot 10, thus fixing mounting frame 3. By installing and removing mounting frame 3, filter screen 4 can be cleaned and maintained. It can be thoroughly cleaned to remove stubborn stains and impurities that are difficult to remove during daily cleaning, restoring the optimal filtration performance of filter screen 4. At the same time, it is also convenient to conduct a detailed inspection of filter screen 4 itself, promptly detect potential damage or signs of aging, and repair or replace it, reducing maintenance and replacement costs and ensuring the normal operation of the rainwater harvesting system.
[0030] Working principle: For this type of rainwater collection cistern, the impurities in the rainwater are first filtered and blocked by the filter screen 4. The water then flows into the inside of the collection cistern body 1 for collection. The operator starts the motor 19 through the external control device. The motor 19 drives the threaded rod 28 to rotate. The threaded rod 28 drives the cleaning frame 8 to move. At the same time, the cleaning frame 8 drives the brush to move, thereby cleaning the garbage and impurities on the surface of the filter screen 4. By cleaning the filter screen 4, impurities are prevented from accumulating excessively on the filter screen 4, ensuring that it can continuously and effectively intercept various impurities such as leaves, branches, mud and sand in the rainwater, maintain good filtration performance, and keep the rainwater entering the cistern relatively clean.
[0031] By pulling handle 26, the operator moves cylinder 25, which in turn moves pull plate 24, causing handle 26 to slide out of the fixing slot 11. Rotating handle 26 then rotates cylinder 25, which in turn rotates pull plate 24, which in turn rotates rotating rod 21. Rotating rod 21 then rotates gear 20, which in turn moves fixing plate 16 relative to it through meshing. Fixing plate 16 then slides out of slot 10, allowing the mounting frame 3 to be removed. To fix the mounting frame 3, pull handle 26 and rotate it in the opposite direction to insert fixing plate 16 into slot 10, thus completing the installation of the mounting frame 3. The installation and removal of mounting frame 3 allows for the maintenance of filter screen 4.
[0032] Although embodiments of the present invention have been shown and described, it will be understood by those skilled in the art that various changes, modifications, substitutions and alterations can be made to these embodiments without departing from the principles and spirit of the present invention, the scope of which is defined by the appended claims and their equivalents.
Claims
1. A rainwater harvesting cistern, comprising a cistern body (1), characterized in that: The surface of the water collection cellar body (1) is provided with a support base (2). Four fixing blocks (12) are fixedly connected to the bottom of the support base (2). A connecting rod (14) is fixedly connected to one side of the fixing block (12). A slot (10) is opened on the surface of the connecting rod (14). An installation frame (3) is provided on the top of the support base (2). A filter screen (4) is provided inside the installation frame (3). A protective groove (18) is opened inside the installation frame (3). A motor (19) is fixedly connected inside the protective groove (18). A sliding groove (6) is opened inside the installation frame (3). A rotating part is rotatably connected inside the sliding groove (6). The output end of the motor (19) rotates through the interior of the protective groove (18) and extends into the interior of the slide groove (6). The output end of the motor (19) is fixedly connected to one end of the threaded rod (28) through a coupling. The surface of the threaded rod (28) is threadedly connected to a cleaning frame (8). The surface of the cleaning frame (8) is slidably connected to the interior of the slide groove (6). A brush is provided at the bottom of the cleaning frame (8). Functional frames (9) are fixedly connected to both sides of the mounting frame (3). A connecting groove (13) is provided at the bottom of the functional frame (9). The interior of the connecting groove (13) is slidably connected to the surface of the connecting rod (14).
2. The rainwater harvesting cisterns according to claim 1, characterized in that: Both sides of the cleaning frame (8) are fixedly connected to a corrugated sleeve (7) that is movably sleeved on the threaded rod (28). The side of the corrugated sleeve (7) away from the filter screen (4) is fixedly connected to the inner wall of the slide groove (6). The functional frame (9) has a limiting groove (15) inside. The cross section of the limiting groove (15) is Z-shaped. Two fixing plates (16) are slidably connected inside the limiting groove (15).
3. The rainwater harvesting cisterns according to claim 2, characterized in that: The limiting groove (15) is rotatably connected to a gear (20), which is located between two fixed plates (16). The fixed plate (16) has teeth on the side near the gear (20), and the fixed plate (16) is meshed with the surface of the gear (20) through the teeth. One end of the gear (20) is fixedly connected to a rotating rod (21).
4. The rainwater harvesting cisterns according to claim 3, characterized in that: The limiting groove (15) is fixedly connected to a first spring (17). The end of the first spring (17) near the fixing plate (16) is fixedly connected to the surface of the fixing plate (16). The side of the fixing plate (16) near the slot (10) is inserted into the slot (10).
5. The rainwater harvesting cisterns according to claim 1, characterized in that: Functional blocks (27) are fixedly installed on the surface of the functional frame (9). A fixing groove (11) is provided on one side of the functional block (27). The cross section of the fixing groove (11) is cross-shaped. A through groove (5) is provided inside the functional block (27). The inside of the through groove (5) is connected to the inside of the fixing groove (11).
6. The rainwater harvesting cisterns according to claim 3, characterized in that: One end of the rotating rod (21) rotates through the interior of the functional frame (9) and extends into the interior of the through slot (5), and one end of the rotating rod (21) is provided with a cylinder (25).
7. The rainwater harvesting cisterns according to claim 6, characterized in that: A pull plate (24) is fixedly connected to one end of the cylinder (25) near the rotating rod (21). A groove (22) is opened inside the rotating rod (21). The surface of the pull plate (24) is slidably connected to the inside of the groove (22). The cross-sections of the pull plate (24) and the groove (22) are both square.
8. The rainwater harvesting cisterns according to claim 7, characterized in that: The groove (22) is fixedly connected to a second spring (23). The end of the second spring (23) near the pull plate (24) is fixedly connected to the surface of the pull plate (24). The end of the cylinder (25) away from the rotating rod (21) is fixedly connected to a handle (26). The surface of the handle (26) is slidably connected to the inside of the fixed groove (11).