A water-collecting self-cleaning filter

Abstract

The application relates to the field of rainwater collection and filtration, in particular to a water-gathering type self-cleaning filter. The filter comprises a shell with both ends being open, a filter inner container with both ends being open is arranged in the shell, one end of the filter inner container is arranged on an inner circumferential wall of the shell and is close to a water inlet of the shell, a water-gathering groove is further arranged on the inner circumferential wall of the shell, one side of the water-gathering groove away from a side wall of the shell is connected with an end wall of the filter inner container close to a water outlet of the shell, a filtering surface of the filter inner container is arranged in an inclined mode, and a water inlet of the filter inner container close to the water inlet of the shell is larger than a water outlet close to the water outlet of the shell; a drainage part connected with the water-gathering groove is arranged on the shell. The application has the functions of good rainwater filtration and collection and certain self-cleaning capacity.

Description

Technical Field

[0001] This application relates to the field of rainwater harvesting and filtration, and more specifically, it relates to a water-collecting self-cleaning filter. Background Technology

[0002] With the increasing severity of global water scarcity and growing environmental awareness, rainwater, as a valuable and renewable alternative water source, has attracted widespread attention for its collection and utilization technologies. Rainwater Harvesting Systems (RWH) can effectively alleviate urban water supply pressure, reduce the burden on municipal stormwater networks, and mitigate flood risks, while also offering significant ecological and economic benefits. They are widely used in areas such as building toilet flushing, garden irrigation, industrial cooling, road cleaning, and even as domestic miscellaneous water after deep treatment.

[0003] However, rainwater washes away atmospheric pollutants (such as dust, acidic gases, and aerosols) during its descent. Upon contact with catchment surfaces (such as rooftops, roads, and plazas), it dissolves or carries away various pollutants (such as silt, leaves, bird droppings, grease, heavy metals, organic matter, and microorganisms). First flush, in particular, typically has a high pollution load. Therefore, directly collecting and storing untreated rainwater can easily lead to water quality deterioration, causing problems such as foul odors, mosquito breeding, pipe blockages, and equipment corrosion. It may also pose health and safety risks to subsequent use (especially for applications involving human contact or irrigation of sensitive crops). Effective pretreatment (primarily filtration) of collected rainwater is crucial for ensuring the long-term stable operation of the system and guaranteeing water safety and quality.

[0004] Chinese patent CN217734276U discloses a rainwater filtration and collection device for sponge cities. The rainwater collection device includes a collection component connected to it. The device comprises: a diversion box fixedly installed on an urban building; a filter assembly installed and fixed on the diversion box for filtering the collected rainwater; and a collection component located at the end of the diversion box and connected to the collection component. The filter assembly includes a first filter plate and a second filter plate, with the first filter plate inclined below the second filter plate, and the filter assembly forming a right angle with the inner wall of the diversion box. This utility model's rainwater filtration and collection device uses a filter assembly to filter rainwater twice, resulting in good filtration. The inclined arrangement of the first filter plate increases the filtration area, enhancing filtration efficiency and reducing the risk of clogging. Furthermore, the water flow is rationally guided, preventing rainwater from clogging the device and avoiding increased pressure on the building's connecting structure. The filter assembly is easy to install, disassemble, clean, and maintain.

[0005] However, in the aforementioned rainwater filtration and collection device, after the debris is filtered out by the filter plate, it is trapped on the filter plate and needs to be cleaned regularly, as it has poor self-cleaning ability. Summary of the Invention

[0006] This application provides a water-collecting self-cleaning filter that achieves good rainwater filtration and collection while possessing a certain degree of self-cleaning capability. Moreover, the product has a simple structure, ingenious design, and strong applicability. Its inner liner's inclined groove design ensures smooth collection and is not prone to clogging. The inclined, dense-mesh filter screen effectively intercepts and discharges debris, and it is easy to install, saving on installation, maintenance, and cleaning costs.

[0007] This application provides a water-collecting self-cleaning filter, which adopts the following technical solution:

[0008] A water-collecting self-cleaning filter includes an outer shell with open ends, and a filter inner liner with open ends installed inside the outer shell. One end of the filter inner liner is located on the inner peripheral wall of the outer shell and near the water inlet of the outer shell. A water-collecting groove is also provided on the inner peripheral wall of the outer shell. The side of the water-collecting groove away from the side wall of the outer shell is connected to the end wall of the filter inner liner near the water outlet of the outer shell. The filter surface of the filter inner liner is inclined. The water inlet of the filter inner liner near the water inlet of the outer shell is larger than the water outlet near the water outlet of the outer shell. A drain component connected to the water-collecting groove is provided on the outer shell.

[0009] By adopting the above technical solution, the top inlet of the outer shell can be connected to the upper interface of the original roof rainwater downpipe, and the outlet of the outer shell is connected to the rainwater downpipe, which is convenient for installation and highly practical. Moreover, in the filter of this application, after rainwater enters through the outer shell, it falls onto the filter inner tank. Due to the inclined filter surface of the filter inner tank, the rainwater can be filtered directly on the filter inner tank. The filtered water enters the water collection tank and is discharged through the drainage component. The setting of the inlet and outlet of the filter inner tank allows excess rainwater and filtered debris to fall under their own gravity after rainwater filtration and be discharged through the outlet of the outer shell, achieving self-cleaning.

[0010] Furthermore, the water collection tank includes a bottom plate and a baffle plate. One end of the bottom plate is connected to the inner peripheral wall of the outer casing. The baffle plate is disposed at the end of the bottom plate away from the side wall of the outer casing and facing the water inlet of the outer casing. The end wall of the filter inner tank near the water outlet of the outer casing is connected to the end wall of the baffle plate facing the water inlet of the outer casing. Even further, the bottom plate is inclined, with the end of the bottom plate and the baffle plate connected inclined towards the water inlet of the outer casing.

[0011] By adopting the above technical solution, the water collection tank is used to collect filtered rainwater and quickly gather it into the external rainwater collection facility; the bottom plate of the water collection tank is inclined, so that when the rainwater passes through the water collection tank, the rainwater itself can wash away small debris on the bottom plate, realize automatic cleaning of the bottom plate, and reduce filter clogging.

[0012] Furthermore, the drainage component includes a drain pipe, one end of which is connected to the outer wall of the housing and communicates with the water collection tank, and the other end of the drain pipe away from the housing is inclined away from the water inlet of the housing.

[0013] Furthermore, the filter inner liner includes a connecting plate and a filter screen. The outlet of the filter screen is connected to the water collection tank via the connecting plate, and the end of the filter screen away from the connecting plate is connected to the outer shell. Even further, the filter screen has an arc-shaped surface, and the side of the filter screen facing the water inlet of the outer shell protrudes outwards.

[0014] By adopting the above technical solutions, the arc-shaped surface of the filter can better meet filtration needs, increase the filtration area, and improve the filtration effect.

[0015] Furthermore, the filter inner liner is connected to the outer shell and the water collection tank via a detachable component. Further still, the detachable component includes a limiting plate, a positioning block, and an insert plate. The end wall of the baffle plate facing the water inlet of the outer shell has a slot. The insert plate is disposed on the connecting plate, inserted into the slot and fitting against the slot wall. Several drain channels are formed through the slot wall on the side away from the water collection tank. The end wall of the insert plate on the side away from the connecting plate has a guide arc surface facing the drain channel. Several limiting plates are disposed on the side wall at the water inlet of the outer shell, and the inner sides of these limiting plates form openings for the filter inner liner to pass through. The positioning block is disposed on the end of the filter screen away from the connecting plate. Adjacent limiting plates form through grooves along the circumference of the outer shell for the positioning block to pass through. The end wall of the positioning block away from the connecting plate fits against the side wall of the limiting plate facing the water outlet of the outer shell.

[0016] By adopting the above technical solution, the detachable component enables the removable installation of the filter inner tank, facilitating its removal and cleaning after prolonged use. Within the detachable component, the engagement of the positioning block and limiting plate, along with the insertion of the slot and insert plate, allows for the positioning of the filter inner tank. Furthermore, when debris inevitably enters the slot, the guide arc surface pushes the debris into the space within the slot, preventing it from affecting the fixation of the insert plate. The drain groove then discharges the debris from the slot during the rotation of the insert plate.

[0017] Furthermore, an overflow pipe is connected to the side wall of the outer casing, and the overflow pipe is located on the side of the water collection tank and the filter inner tank away from the water inlet of the outer casing.

[0018] By adopting the above technical solution, when too much rainwater remains inside the casing, the rainwater can be discharged in time through the overflow pipe, allowing the filter to work normally and reducing clogging.

[0019] In summary, this application has the following beneficial effects:

[0020] 1. The filter of this application can be applied to rainwater flower boxes and rainwater bottles in sponge city construction, as well as in projects that collect and reuse roof rainwater through rainwater downpipes. The filter of this application improves upon the problems of existing rainwater filter products, such as easy clogging, ineffective rainwater collection, cumbersome installation, and complex design, and has the advantages of reasonable structure, good collection effect, convenient installation, and aesthetic appeal.

[0021] 2. The bottom of the water collection tank and the drain pipe of this application are both inclined, which can quickly collect rainwater and drain it. At the same time, the inclined bottom of the water collection tank can also effectively clean the fine silt and impurities left in the water collection tank through the impact force of the rainwater itself, thereby avoiding filter clogging and reducing maintenance and cleaning processes.

[0022] 3. The filter inner tank of this application mainly serves to filter and intercept rainwater. Its sloping design can increase the interception area and increase the rainwater collection capacity. It can also discharge the intercepted particulate impurities and excess rainwater into the rainwater inspection well through the outlet of the filter inner tank in the first time, so as to achieve self-cleaning, thereby avoiding the probability of filter clogging, increasing the service life of the filter and reducing the maintenance cost of the filter. Attached Figure Description

[0023] Figure 1 This is a schematic diagram of the structure of the water-collecting self-cleaning filter in Embodiment 1 of this application.

[0024] Figure 2 This is a cross-sectional view of the water-collecting self-cleaning filter in Embodiment 1 of this application.

[0025] Figure 3 This is a cross-sectional view of the water-collecting self-cleaning filter in Embodiment 2 of this application.

[0026] Figure 4 yes Figure 3 Enlarged view of point A in the middle.

[0027] Figure 5 This is an exploded view of the detachable structure in Embodiment 2 of this application.

[0028] Explanation of reference numerals in the attached drawings: 1. Outer shell; 2. Inner filter liner; 21. Filter screen; 22. Connecting plate; 3. Water collection tank; 31. Base plate; 32. Water baffle; 4. Drainage component; 41. Drainage pipe; 5. Overflow pipe; 6. Detachable component; 61. Limiting plate; 62. Positioning block; 63. Insert plate; 64. Slot; 65. Through groove; 66. Through opening; 67. Sewage discharge trough; 68. Sewage guiding arc surface. Detailed Implementation

[0029] The present application will be further described in detail below with reference to the accompanying drawings and embodiments.

[0030] Example 1

[0031] like Figure 1 and Figure 2 As shown, a water-collecting self-cleaning filter includes a housing 1 with open ends. In this embodiment, the housing 1 is cylindrical and placed vertically during use. The top of the housing 1 is the water inlet, and the bottom is the water outlet. The water inlet of the housing 1 connects to the upper interface of the original roof rainwater downpipe, mainly used to collect rainwater collected from the roof and falling through the rainwater downpipe. The water outlet of the housing 1 connects to the lower pipe interface of the rainwater downpipe, allowing filtered impurities and excess water to be discharged through the lower pipe into the rainwater downpipe inlet and collected into the rainwater pipe network. The housing 1 can be made of materials such as PVC, PE, and PP.

[0032] like Figure 2 As shown, a filter inner liner 2 with open ends is installed inside the outer shell 1. In this embodiment, the filter inner liner 2 includes a connecting plate 22 and a filter screen 21. In this embodiment, the filter screen 21 is a fine-mesh filter screen with open ends along the vertical direction. The top of the filter screen 21 is connected to the inner peripheral wall of the water inlet of the outer shell 1. The water inlet at the top of the filter screen 21 is larger than the water outlet below the filter screen 21. The filter screen 21 has an arc-shaped surface, and the filter surface is convex on the side facing the water inlet of the outer shell 1. Therefore, in the outer shell 1, the filter surface of the filter screen 21, i.e., the filter inner liner 2, is inclined. The connecting plate 22 is connected to the end wall of the water outlet at the bottom of the filter screen 21.

[0033] In this embodiment, a water collection tank 3 is also connected to the inner peripheral wall of the outer shell 1. The water collection tank 3 includes a bottom plate 31 and a baffle plate 32. One lateral end of the bottom plate 31 is connected to the inner peripheral wall of the outer shell 1, and the bottom plate 31 is inclined, with the side connected to the outer shell 1 tilting downwards. The baffle plate 32 is integrally connected to the end of the bottom plate 31 away from the side wall of the outer shell 1. The top end of the baffle plate 32 faces the water inlet of the outer shell 1, and the top end of the baffle plate 32 is connected to the connecting plate 22 of the filter inner liner 2.

[0034] In this embodiment, the outer casing 1 is provided with a drain component 4 connected to the water collection tank 3. The drain component 4 includes a drain pipe 41, one end of which is connected to the outer wall of the outer casing 1 and communicates with the water collection tank 3. The end of the drain pipe 41 away from the outer casing 1 is inclined away from the water inlet of the outer casing 1. An overflow pipe 5 is also connected to the side wall of the outer casing 1. The overflow pipe 5 is located below the water collection tank 3 and the filter inner liner 2.

[0035] The working process of a water-collecting self-cleaning filter in Example 1 is as follows: rainwater enters the housing 1 through the inlet of the housing 1, and is then filtered by the filter screen 21. The filtered rainwater enters the water collection tank 3 and is discharged along the inclined bottom plate 31 and drain pipe 41 of the water collection tank 3. The filtered debris and excess rainwater fall through the bottom outlet of the filter screen 21 under their own gravity and are then discharged through the outlet at the bottom of the housing 1.

[0036] Example 2

[0037] like Figure 3 , Figure 4 and Figure 5 As shown, the difference between Embodiment 2 and Embodiment 1 is that the filter inner liner 2 is connected to the outer shell 1 and the water collection tank 3 via a detachable component 6. In this embodiment, the detachable component 6 includes a limiting plate 61, a positioning block 62, and an insert plate 63. A ring-shaped slot 64 is provided on the top side wall of the baffle plate 32. The insert plate 63 is fixedly connected to the bottom end of the connecting plate 22. The insert plate 63 is inserted into the slot 64 and fits against the slot wall. Several drain grooves 67 are provided through the inner ring wall of the slot 64. A guide arc surface 68 is provided at the bottom end of the insert plate 63. The guide arc surface 68 faces the drain groove 67. The limiting plate 61 is provided on the side wall at the water inlet of the outer shell 1. There are several limiting plates 61. The inner side of several limiting plates 61 forms a passage 66 for the filter inner liner 2 to pass through. The positioning block 62 is connected to the end of the filter screen 21 away from the connecting plate 22. Adjacent limiting plates 61 form a through groove 65 along the circumference of the outer shell 1 for the positioning block 62 to pass through. The side wall of the positioning block 62 away from the connecting plate 22 fits against the side wall of the limiting plate 61 facing the water outlet of the outer shell 1.

[0038] By aligning the positioning block 62 with the through slot 65, the insert plate 63 can be passed through the through opening 66 and inserted into the slot 64. Then, rotate the filter inner liner 2 so that the positioning block 62 abuts against the bottom wall of the limiting plate 61, thus fixing the filter inner liner 2. During rotation, dirt in the slot 64 can be discharged through the drain trough 67 under the action of the guide slope. After a period of time, when the filter screen 21 needs to be cleaned, rotate the filter screen 21 so that the positioning block 62 and the through slot 65 are aligned, and the filter screen 21 can be pulled out of the outer shell 1 for cleaning.

[0039] This specific embodiment is merely an explanation of this application and is not intended to limit it. After reading this specification, those skilled in the art can make modifications to this embodiment without contributing any inventive step, but such modifications are protected by patent law as long as they fall within the scope of the claims of this application.

Claims

1. A coalescing filter with self-cleaning, characterized in that, The device includes an outer shell (1) with open ends, and a filter inner liner (2) with open ends installed inside the outer shell (1). One end of the filter inner liner (2) is located on the inner peripheral wall of the outer shell (1) and close to the water inlet of the outer shell (1). A water collection tank (3) is also provided on the inner peripheral wall of the outer shell (1). The side of the water collection tank (3) away from the side wall of the outer shell (1) is connected to the end wall of the filter inner liner (2) close to the water outlet of the outer shell (1). The filter surface of the filter inner liner (2) is inclined. The water inlet of the filter inner liner (2) close to the water inlet of the outer shell (1) is larger than the water outlet close to the water outlet of the outer shell (1). A drain component (4) connected to the water collection tank (3) is provided on the outer shell (1).

2. A coalescing filter according to claim 1, wherein, The water collection tank (3) includes a bottom plate (31) and a baffle plate (32). One end of the bottom plate (31) is connected to the inner peripheral wall of the outer shell (1). The baffle plate (32) is located at the end of the bottom plate (31) away from the side wall of the outer shell (1) and facing the water inlet of the outer shell (1). The end wall of the filter inner tank (2) near the water outlet of the outer shell (1) is connected to the end wall of the baffle plate (32) facing the water inlet of the outer shell (1).

3. A coalescing filter according to claim 2, wherein, The base plate (31) is inclined, and the end where the base plate (31) and the baffle plate (32) are connected is inclined toward the water inlet of the outer shell (1).

4. The self-cleaning filter according to claim 1, wherein The drainage component (4) includes a drain pipe (41), one end of which is connected to the outer wall of the outer shell (1) and communicates with the water collection tank (3). The end of the drain pipe (41) away from the outer shell (1) is inclined away from the water inlet of the outer shell (1).

5. A coalescing filter according to claim 2, wherein, The filter inner liner (2) includes a connecting plate (22) and a filter screen (21). The outlet of the filter screen (21) is connected to the water collection tank (3) through the connecting plate (22). The end of the filter screen (21) away from the connecting plate (22) is connected to the outer shell (1).

6. A coalescing filter according to claim 5, wherein, The filter screen (21) has an arc-shaped surface and the filter screen (21) is convex outward on the side facing the water inlet of the outer shell (1).

7. A coalescing filter according to claim 5, wherein, The filter inner liner (2) is connected to the outer shell (1) and the water collection tank (3) via a detachable component (6).

8. A coalescing filter according to claim 7, wherein, The detachable component (6) includes a limiting plate (61), a positioning block (62), and an insert plate (63). The water baffle (32) has a slot (64) on its end wall facing the water inlet of the outer shell (1). The insert plate (63) is mounted on the connecting plate (22). The insert plate (63) is inserted into the slot (64) and fits against the wall of the slot (64). Several drain troughs (67) are provided through the wall of the slot (64) away from the water collection tank (3). The end wall of the insert plate (63) away from the connecting plate (22) has a guide arc surface (68). The guide arc surface (68) faces the drain trough. (67) The limiting plate (61) is set on the side wall at the water inlet of the outer shell (1). There are several limiting plates (61). The inner side of several limiting plates (61) forms a through opening (66) for the filter inner liner (2) to pass through. The positioning block (62) is set at the end of the filter screen (21) away from the connecting plate (22). Adjacent limiting plates (61) form a through groove (65) along the circumference of the outer shell (1) for the positioning block (62) to pass through. The side wall of the positioning block (62) away from the connecting plate (22) and the side wall of the limiting plate (61) facing the water outlet of the outer shell (1) are attached.

9. The self-cleaning filter according to claim 1, wherein An overflow pipe (5) is connected to the side wall of the outer shell (1). The overflow pipe (5) is located on the side of the water collection tank (3) and the filter inner liner (2) away from the water inlet of the outer shell (1).

Images