A rainwater treatment device

Abstract

The present invention belongs to the fields of water resource recovery, sponge city construction, and rainwater control, and discloses a rainwater treatment device, including a cylinder, a filter cylinder, and a valve plate mechanism. A vertically arranged partition is provided in the cylinder, and the partition separates the cylinder into an overflow chamber and a water inlet chamber. The overflow chamber is provided with a water outlet, and the water inlet chamber is provided with a water inlet and a backflow port, and the water inlet is located below the backflow port; the filter cylinder is arranged in the overflow chamber, the water inlet of the filter cylinder is connected to the water inlet chamber, the water outlet of the filter cylinder is connected to the water outlet, and the outer wall of the filter cylinder is spaced from the inner wall of the cylinder, and the filter cylinder is used to filter rainwater; the valve plate mechanism is arranged in the water inlet chamber, and is used to close the water inlet when the water level in the water inlet chamber rises, and to open the water inlet when the water level in the water inlet chamber drops. The present invention can not only separate the initial rainwater from the mid- and late-stage rainwater, but also can directly purify the initial rainwater before discharging it, thereby improving the surface runoff control rate and the non-point source pollution reduction rate.

Description

Technical Field

[0001] The present invention relates to the fields of water resource utilization, sponge city, rainwater control, and in particular to a rainwater treatment device. Background Art

[0002] With the development of industry, the increase of population and the advancement of urbanization, water resources are becoming increasingly scarce, and the rainwater from concentrated rainfall flows away in vain, causing floods, making the recycling and utilization of rainwater increasingly important. The recycling and utilization of rainwater refers to the use of rainfall runoff collected from hardened surfaces such as building roofs, roads, and squares, which is collected, transported, and stored to provide replenishment for greening, landscape water bodies, washing, and groundwater sources. The existing house rainwater device is connected to the rainwater collection pipe to collect roof rainwater, but it is unable to separate the initial dirty rainwater from the later cleaner rainwater. In related engineering projects, roof rainwater can only be controlled by two methods: terminal regulation and rainwater pipe disconnection, which greatly limits the design of the rainwater drainage system. Summary of the invention

[0003] The purpose of the present invention is to provide a rainwater treatment device, which can not only separate initial rainwater from mid- and late-stage rainwater, but also purify the initial rainwater before discharging it.

[0004] The technical solution provided by the present invention is as follows:

[0005] A rainwater treatment device, comprising:

[0006] A cylinder, wherein a vertical partition is provided in the cylinder, the partition divides the cylinder into an overflow chamber and a water inlet chamber, the overflow chamber is provided with a water outlet, the water inlet chamber is provided with a water inlet and a backflow port, and the water inlet is located below the backflow port;

[0007] A filter cartridge is arranged in the overflow chamber, a water inlet of the filter cartridge is communicated with the water inlet chamber, a drain outlet of the filter cartridge is communicated with the water outlet, an outer wall of the filter cartridge is spaced from an inner wall of the cylinder body, and the filter cartridge is used to filter rainwater;

[0008] The valve plate mechanism is arranged in the water inlet chamber and is used for closing the water inlet when the water level in the water inlet chamber rises, and opening the water inlet when the water level in the water inlet chamber drops.

[0009] Further preferably, the valve plate mechanism includes a support member, a connecting rod, a first float and a valve plate, the support member is arranged at the bottom of the water inlet chamber, the connecting rod is hinged to the support member, the first float is arranged at one end of the connecting rod, the valve plate is arranged at the other end of the connecting rod, and the valve plate is used to close the water inlet.

[0010] Further preferably, the connecting rod includes a first connecting rod and a second connecting rod, the first connecting rod is hinged to the support member, the first float is arranged at one end of the first connecting rod, the other end of the first connecting rod is hinged to one end of the second connecting rod, and the valve plate is arranged at the other end of the second connecting rod.

[0011] Further preferably, one end of the valve plate is hinged to the partition, and the other end of the valve plate corresponds to the end of the water inlet.

[0012] Further preferably, the valve plate mechanism also includes a rotating shaft, a third connecting rod, a second float and a baffle, the rotating shaft is rotatably arranged on the partition, the other end of the third connecting rod is fixedly connected to the rotating shaft, the other end of the third connecting rod is provided with the second float, one end of the baffle is fixedly connected to the partition, and the other end of the baffle is abutted against the rotating shaft for limiting the rotation angle of the rotating shaft so that the second float is located above the first float, and a cam is provided on the rotating shaft, and the cam is arranged corresponding to the valve plate.

[0013] More preferably, it further comprises a cylinder cover, which is arranged on the top of the cylinder.

[0014] Further preferably, an overflow port is formed between the top of the partition and the cylinder cover.

[0015] Further preferably, it also includes a support plate, which is horizontally arranged in the water inlet chamber and is used to divide the water inlet chamber into two upper and lower cavities, and a through hole is provided on the support plate, and the through hole is connected with the water inlet through a curved pipe, and the water inlet is located below the support plate, the valve plate mechanism is arranged on the support plate, and the water inlet is located above the support plate.

[0016] Further preferably, a plurality of drainage arches are provided at the bottom of the filter cartridge, and the plurality of drainage arches are arranged at intervals along the circumference of the filter cartridge, and the drainage arches serve as the drainage outlets.

[0017] Further preferably, it also includes a filter screen cover, which is arranged in the cylinder and located at the water inlet.

[0018] The technical effects of the present invention are:

[0019] (1) The filter cartridge of the present invention is connected to the water inlet chamber, and the initial rainwater entering the water inlet chamber can directly enter the filter cartridge for filtration and discharge, so as to automatically separate the rainwater with pollutants such as mud, gravel, dust, etc. in the initial rainwater of the house, and can directly filter and purify the separated initial rainwater, reduce SS, collect relatively clean rainwater and discharge it into the municipal pipe network or into the ground biological retention measures, comprehensively utilize rainwater resources, and improve the utilization rate of water resources. In addition, the rainwater treatment device of the present invention integrates multiple functions, has a simple structure, a small size, a small footprint, a low investment cost, and is simple to construct.

[0020] (2) The rainwater treatment device of the present invention does not require power and is easy to operate. It is very suitable for greening renovation in front of and behind buildings and in communities. In addition, through a dot matrix layout, it can be applied to large areas. Each block operates independently without interfering with each other. It is easy to use and simplifies the layout of the pipe network.

[0021] (3) The layout of the present invention provides a new construction route for sponge city construction in special soil areas, and increases the control methods for roof rainwater in conventional soil areas, such as interception control during the transmission of roof rainwater, thereby reducing the restrictions of sponge city construction on the rainwater drainage systems of buildings and communities, meeting the requirements of sponge city construction while improving the quality of architectural landscapes. BRIEF DESCRIPTION OF THE DRAWINGS

[0022] The present invention is further described in detail below in conjunction with the accompanying drawings and specific embodiments:

[0023] Figure 1 It is a front cross-sectional view of the first embodiment of the rainwater treatment device of the present invention;

[0024] Figure 2 This is a schematic structural diagram of a rainwater treatment device according to a first embodiment of the present invention;

[0025] Figure 3 This is a schematic diagram of the internal structure of a rainwater treatment device according to a first embodiment of the present invention;

[0026] Figure 4 It is a partial structural schematic diagram of the first embodiment of the rainwater treatment device of the present invention;

[0027] Figure 5 is a cross-sectional view of the filter cartridge of the present invention;

[0028] Figure 6 It is a structural schematic diagram of a second embodiment of a rainwater treatment device of the present invention;

[0029] Figure 7 for Figure 6 Enlarged view of point A in the middle.

[0030] Description of Figure Numbers:

[0031] 1. Cylinder body; 101. Overflow chamber; 102. Water inlet chamber; 2. Cylinder cover; 3. Water inlet; 4. Water outlet; 5. Backflow port; 6. Partition; 7. Filter cylinder; 701. Filter screen; 702. Water inlet; 703. Water outlet; 8. Support plate; 9. Valve plate mechanism; 901. Support member; 902. Connecting rod; 9021. First connecting rod; 9022. Second connecting rod; 903. First float; 904. Valve plate; 905. Second float; 906. Third connecting rod; 907. Rotating shaft; 9071. Cam; 908. Baffle; 10. Filter screen cover. DETAILED DESCRIPTION

[0032] In order to more clearly illustrate the embodiments of the present invention or the technical solutions in the prior art, the drawings required for use in the embodiments or the description of the prior art will be briefly introduced below. Obviously, the drawings described below are only some embodiments of the present invention. For ordinary technicians in this field, other drawings can be obtained based on these drawings without paying creative work.

[0033] In order to simplify the drawings, only the parts related to the present invention are schematically shown in each figure, and they do not represent the actual structure of the product. In addition, in order to simplify the drawings and facilitate understanding, in some figures, only one of the parts with the same structure or function is schematically drawn or marked. In this article, "one" not only means "only one", but also means "more than one".

[0034] It should be further understood that the term “and / or” used in the specification and appended claims refers to any combination and all possible combinations of one or more of the associated listed items, and includes these combinations.

[0035] In this document, it should be noted that, unless otherwise clearly specified and limited, the terms "installed", "connected", and "connected" should be understood in a broad sense, for example, it can be a fixed connection, a detachable connection, or an integral connection; it can be a mechanical connection or an electrical connection; it can be a direct connection, or it can be indirectly connected through an intermediate medium, or it can be the internal communication of two components. For ordinary technicians in this field, the specific meanings of the above terms in the present invention can be understood according to specific circumstances.

[0036] In addition, in the description of the present application, the terms "first", "second", etc. are only used to distinguish the description and cannot be understood as indicating or implying relative importance.

[0037] Embodiment 1

[0038] A rainwater treatment device, such as Figures 1 to 5As shown, it includes a cylinder 1, a filter cylinder 7 and a valve plate mechanism 9. The cylinder 1 is a cylindrical structure, and the cross section of the cylinder 1 can be circular, rectangular, polygonal, etc. The top of the cylinder 1 is movably connected with a cylinder cover 2, which can be removed from the cylinder 1 to facilitate the inspection or cleaning of the mechanism inside the cylinder 1. The cylinder cover 2 can be closed or meshed.

[0039] A vertically arranged partition 6 is provided in the cylinder body 1. The partition 6 divides the cylinder body 1 into an overflow chamber 101 and a water inlet chamber 102 arranged on the left and right. An overflow port is formed between the top of the partition 6 and the cylinder cover 2. The water in the water inlet chamber 102 can enter the overflow chamber 101 through the overflow port at the top of the partition 6. The overflow chamber 101 is provided with a water outlet 4, and the water inlet chamber 102 is provided with a water inlet 3 and a backflow port 5. The water inlet 3 is located below the backflow port 5. The water inlet 3 can be connected to the roof drain pipe to collect rainwater on the roof. The water in the water inlet chamber 102 can be discharged from the cylinder body 1 through the backflow port 5. The water discharged from the backflow port 5 can infiltrate the bioretention facility under the rain garden, or enter other water storage devices. The water discharged from the water outlet 4 can enter the municipal pipe network. A filter net can be set at the backflow port 5.

[0040] The filter cartridge 7 is arranged in the overflow chamber 101, and the water inlet 702 of the filter cartridge 7 is connected with the water inlet chamber 102. The water inlet 702 can penetrate the side wall of the partition 6. The connection between the inside of the filter cartridge 7 and the water inlet chamber 102 is achieved by penetrating the water inlet 702 of the partition 6. The drain port 703 of the filter cartridge 7 is connected with the water outlet 4. There is a distance between the outer wall of the filter cartridge 7 and the inner wall of the cylinder body 1. The filter cartridge 7 is used to filter rainwater.

[0041] A filter screen 701 is provided in the filter cartridge 7, and rotating shafts are provided on both sides of the filter screen 701. The rotating shafts are hinged to the inner wall of the filter cartridge 7, and the filter screen 701 is fixed in the filter cartridge 7 through the hinge of the rotating shaft and the filter cartridge 7. The filter screen 701 is located below the water inlet 702. After the rainwater in the water inlet chamber 102 enters the filter cartridge 7 from the water inlet 702 of the filter cartridge 7, it is filtered and purified by the filter screen 701 and then discharged from the drain port 703. Purifying the initial rainwater before discharging it can improve the surface runoff control rate and the non-point source pollution reduction rate.

[0042] Preferably, a plurality of drainage arches are provided at the bottom of the filter cartridge 7, and the plurality of drainage arches are arranged at intervals along the circumference of the filter cartridge 7, and the drainage arches are drainage ports 703 of the filter cartridge 7. After being filtered by the filter screen 701, the water in the filter cartridge 7 is discharged from the drainage arches into the overflow chamber 101, and then discharged from the water outlet 4 of the overflow chamber 101.

[0043] The valve plate mechanism 9 is arranged in the water inlet chamber 102, and is used to close the water inlet 702 when the water level in the water inlet chamber 102 rises, and to open the water inlet 702 when the water level in the water inlet chamber 102 drops. The valve plate mechanism 9 includes a support member 901, a connecting rod 902, a first floating ball 903 and a valve plate 904. One end of the support member 901 is arranged at the bottom of the water inlet chamber 102, the connecting rod 902 is hinged to the other end of the support member 901, the first floating ball 903 is arranged at one end of the connecting rod 902, and the valve plate 904 is arranged at the other end of the connecting rod 902. The valve plate 904 is adapted to the water inlet 702. When the water level is low, the valve plate 904 opens. When the water level is high, the first floating ball 903 rises with the water level. Through the lever principle, the valve plate 904 drops to block the water inlet 702.

[0044] Further, the connecting rod 902 includes a first connecting rod 9021 and a second connecting rod 9022, the first connecting rod 9021 is hinged to the support member 901, the first floating ball 903 is arranged at one end of the first connecting rod 9021, the other end of the first connecting rod 9021 is hinged to one end of the second connecting rod 9022, and the valve plate 904 is arranged at the other end of the second connecting rod 9022. One end of the valve plate 904 is hinged to the partition 6, and the other end of the valve plate 904 corresponds to the end of the water inlet 702.

[0045] A filter screen cover 10 is also provided in the cylinder 1, and the filter screen cover 10 is arranged at the water inlet 3. The filter screen cover 10 includes a side plate and a top plate, both of which are mesh structures, and the side plate, the bottom of the cylinder 1, and the inner wall of the cylinder 1 are surrounded to form a receiving space, and the top plate cover is arranged on the receiving space. Rainwater entering from the water inlet 3 first enters the receiving space of the filter screen cover 10, and then enters the water inlet chamber 102 after preliminary filtration through the filter screen cover 10.

[0046] The working process of the rainwater treatment device is:

[0047] 1. Initially, rainwater enters the water inlet chamber 102 of the cylinder 1 through the water inlet 3. The rainwater entering the water inlet chamber 102 enters the filter cylinder 7 from the water inlet 702 of the filter cylinder 7, is filtered by the filter screen 701, and is discharged from the water outlet 4 at the bottom of the cylinder 1.

[0048] 2. When the amount of rainwater increases, the filter cartridge 7 begins to accumulate water, the water level rises, and the water level in the water inlet chamber 102 rises synchronously. When the water level rises to the point where the first float 903 floats, the valve plate 904 is driven to close through the connecting rod 902, and the water level in the water inlet chamber 102 continues to rise. When the water level reaches the backflow port 5, the rainwater infiltrates from the backflow port 5 into the bioretention facility or other water storage device under the garden.

[0049] 3. When the water storage volume is sufficient and the water level continues to rise to above the top of the partition 6, the water overflows from the overflow port between the partition 6 and the cylinder cover 2 to the overflow chamber 101 and flows directly from the water outlet 4 to ensure drainage safety;

[0050] 4. In the later period of rainfall, the amount of water decreases and the water level in the water inlet chamber 102 gradually drops. When the water level drops to a certain position, the first float 903 falls, opening the valve plate 904, and water flows into the filter cartridge 7 from the water inlet 702, and is discharged from the water outlet 4 after being filtered by the filter screen 701.

[0051] Since the initial rainwater is relatively dirty, the rainwater entering the water inlet chamber 102 at the initial stage needs to enter the filter cartridge 7 for filtration first, and then be discharged into the municipal pipe network from the outlet 4 of the overflow chamber 101. When the water level in the water inlet chamber 102 rises to a level higher than the top of the partition 6, the water entering the overflow chamber 101 from the overflow port at the top of the partition 6 is mid- and late-stage rainwater. The mid- and late-stage rainwater is relatively clean, so it can be directly discharged into the municipal pipe network from the outlet 4 of the overflow chamber 101 without passing through the filter cartridge 7. The water discharged from the backflow port 5 can be discharged into the biological retention facility under the rain garden for rainwater storage and biological purification.

[0052] Furthermore, the overflow chamber 101 of the cylinder 1 is also provided with a one-way water inlet 3, which is used to allow the water purified by the rain garden to enter the overflow chamber 101 and be discharged into the municipal pipe network through the water outlet 4 to achieve rainwater recycling.

[0053] The rainwater treatment device of this embodiment can be used for the collection and purification of rainwater on building roofs. The rainwater on the roof can be directly connected to the ground bioretention measures or discharged into the municipal pipe network through this device. There is no need to use the external drainage disconnection of the roof rainwater pipe, and the internal drainage of the roof rainwater can be used. Benefits of use in different regions: 1. Sponge city construction in collapsible loess areas to ensure a safe distance between buildings and sponge city facilities to achieve the purpose of ecological construction and building safety; 2. Use in conventional areas can increase the location options for sponge city layout, improve the beauty of building facades, and improve the quality of landscape.

[0054] Embodiment 2

[0055] Except for the valve plate mechanism 9, the other structures of this embodiment are the same as those of the first embodiment, and the same parts are not repeated here. Figure 6 and Figure 7As shown, the valve plate mechanism 9 of this embodiment includes a support member 901, a first floating ball 903, a second floating ball 905, a first connecting rod 9021, a second connecting rod 9022, a third connecting rod 906, a rotating shaft 907, a baffle 908 and a valve plate 904. The support member 901 is arranged at the bottom of the cylinder 1, the first connecting rod is hinged to the support member 901, one end of the first connecting rod 9021 is provided with a first floating ball 903, the other end of the first connecting rod 9021 is hinged to one end of the second connecting rod 9022, the other end of the second connecting rod 9022 is hinged to one end of the valve plate 904, and the other end of the valve plate 904 is hinged to the partition 6. The rotating shaft 907 is rotatably set on the partition 6, and the rotating shaft 907 is set parallel to the partition 6. The other end of the third connecting rod 906 is fixedly connected to the rotating shaft 907, and the other end of the third connecting rod 906 is provided with a second float 905. One end of the baffle 908 is fixedly connected to the partition 6, and the other end of the baffle 908 abuts against the rotating shaft 907, which is used to limit the rotation angle of the rotating shaft 907 so that the second float 905 is located above the first float 903. Preferably, the height of the second float 905 corresponds to the lower edge line of the reversal port 5. A cam 9071 is provided on the rotating shaft 907, and the cam 9071 is set corresponding to the valve plate 904.

[0056] In the initial state (falling back state), the first float 903 and the second float 905 both fall to their respective lowest positions, and the baffle 908 limits the height position of the second float 905. At this time, the second float 905 is located above the first float 903, and the valve plate 904 is in a fully open state.

[0057] At the beginning of rain, the water flow is very small, the liquid level in the water inlet chamber 102 is below the backflow port 5, the first float 903 is completely immersed in water, the second float 905 is above the water surface and does not move, and the valve plate 904 is in a slightly open state.

[0058] When the rain is getting heavier, the water in the water inlet chamber 102 has no time to flow into the filter cartridge 7 (or the water level in the filter cartridge 7 rises), the water level in the water inlet chamber 102 rises, the first float 903 starts to float, and drives the valve plate 904 to slowly close. When the first float 903 floats to a certain position, the valve plate 904 hits the cam 9071 on the rotating shaft 907, and the valve plate 904 stops moving (because the second float 905 is on the water surface, there is no buoyancy and it does not move).

[0059] When the water level in the water inlet chamber 102 continues to rise and reaches the lower edge of the backflow port 5, the second float 905 begins to float slowly and drives the rotating shaft 907 to rotate through the third connecting rod 906, so that the cam 9071 on the rotating shaft 907 gradually moves away from the valve plate 904, and the valve plate 904 also continues to rotate in the closing direction. The water in the water inlet chamber 102 mainly flows out from the backflow port 5.

[0060] After the water level continues to rise and exceeds the upper edge of the backflow port 5, the second float 905 floats to the highest point, and the cam 9071 completely disengages from the valve plate 904 and no longer blocks the valve plate 904 from closing. At this time, the valve plate 904 is completely closed, and the water flows completely out of the backflow port 5.

[0061] When the water inlet chamber 102 is full of rainwater, the water level in the water inlet chamber 102 continues to rise. When the water level exceeds the top position of the partition 6, excess rainwater flows out of the water inlet chamber 102 from the overflow port at the top of the partition 6, enters the overflow chamber 101 and falls into the bottom of the cylinder 1, and flows directly from the water outlet 4 to ensure smooth drainage.

[0062] In this embodiment, by adding structures such as a second float 905, a rotating shaft 907, a cam 9071 and a baffle 908, the closing size of the valve plate 904 can be adjusted according to the water level in the water inlet chamber 102 to select a suitable drainage path, thereby ensuring smooth drainage and optimizing the drainage method.

[0063] Embodiment 3

[0064] The structures of the cylinder 1, the filter cylinder 7, the valve plate mechanism 9, etc. of this embodiment are the same as those of the first or second embodiment, and the same parts are not repeated here. Figure 3 and Figure 6 As shown, the difference between this embodiment and the first or second embodiment is that the rainwater treatment device of this embodiment further includes a support plate 8, which is horizontally arranged in the water inlet chamber 102, and is used to divide the water inlet chamber 102 into two upper and lower cavities, and the valve plate mechanism 9 is arranged on the support plate 8, and the water inlet 3 is located above the support plate 8. The water inlet 702 can be arranged above or below the support plate 8. When the water inlet 702 is arranged above the support plate 8, the filter cartridge 7 can be directly connected to the water inlet chamber 102 through the water inlet 702. When the water inlet 702 is located below the support plate 8, a through hole can be arranged on the support plate 8, and the through hole is connected to the water inlet 702 through a bend pipe, thereby realizing the connection between the filter cartridge 7 and the water inlet chamber 102.

[0065] The above is only a preferred embodiment of the present invention. It should be pointed out that for ordinary technicians in this technical field, several improvements and modifications can be made without departing from the principle of the present invention. These improvements and modifications should also be regarded as the scope of protection of the present invention.

Claims

1. A rainwater treatment device, characterized in that: include: A cylinder, wherein a vertical partition is provided in the cylinder, the partition divides the cylinder into an overflow chamber and a water inlet chamber, the overflow chamber is provided with a water outlet, the water inlet chamber is provided with a water inlet and a backflow port, and the water inlet is located below the backflow port; A filter cartridge is arranged in the overflow chamber, a water inlet of the filter cartridge is communicated with the water inlet chamber, a drain outlet of the filter cartridge is communicated with the water outlet, an outer wall of the filter cartridge is spaced from an inner wall of the cylinder, and the filter cartridge is used to filter rainwater; A valve plate mechanism is arranged in the water inlet chamber, and is used to close the water inlet when the water level in the water inlet chamber rises, and to open the water inlet when the water level in the water inlet chamber drops; A support plate, the support plate is horizontally arranged in the water inlet chamber, and is used to divide the water inlet chamber into two upper and lower cavities, the support plate is provided with a through hole, the through hole is connected with the water inlet through a bend pipe, the water inlet is located below the support plate, the valve plate mechanism is arranged on the support plate, and the water inlet is located above the support plate; The valve plate mechanism includes a support, a connecting rod, a first float and a valve plate. The support is arranged at the bottom of the water inlet chamber, the connecting rod is hinged to the support, the first float is arranged at one end of the connecting rod, and the valve plate is arranged at the other end of the connecting rod. The valve plate is used to close the water inlet; one end of the valve plate is hinged to the partition, and the other end of the valve plate corresponds to the end of the water inlet.

2. A rainwater treatment device according to claim 1, characterized in that: The connecting rod includes a first connecting rod and a second connecting rod, the first connecting rod is hinged to the support member, the first floating ball is arranged at one end of the first connecting rod, the other end of the first connecting rod is hinged to one end of the second connecting rod, and the valve plate is arranged at the other end of the second connecting rod.

3. A rainwater treatment device according to claim 1, characterized in that: The valve plate mechanism also includes a rotating shaft, a third connecting rod, a second float and a baffle. The rotating shaft is rotatably arranged on the partition. One end of the third connecting rod is fixedly connected to the rotating shaft, and the other end of the third connecting rod is provided with the second float. One end of the baffle is fixedly connected to the partition, and the other end of the baffle abuts against the rotating shaft to limit the rotation angle of the rotating shaft so that the second float is located above the first float. A cam is provided on the rotating shaft, and the cam is arranged corresponding to the valve plate.

4. A rainwater treatment device according to claim 1, characterized in that: A cylinder cover is also included, and the cylinder cover is arranged on the top of the cylinder.

5. A rainwater treatment device according to claim 4, characterized in that: An overflow port is formed between the top of the partition and the cylinder cover.

6. A rainwater treatment device according to claim 1, characterized in that: A plurality of drainage arches are provided at the bottom of the filter cartridge, and the plurality of drainage arches are arranged at intervals along the circumference of the filter cartridge, and the drainage arches serve as the drainage outlets.

7. A rainwater treatment device according to claim 1, characterized in that: It also includes a filter screen cover, which is arranged in the cylinder and located at the water inlet.

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