Self-pollution-discharge water body filtering device

Abstract

The invention relates to a self-pollution-discharge water body filtering device which is characterized by comprising a primary filtering mechanism, an aeration tank, a flocculation filtering mechanism and a secondary filtering mechanism, the primary filtering mechanism is arranged beside the aeration tank, and a water outlet of the primary filtering mechanism is connected with a water inlet of the aeration tank; a water outlet of the aeration tank is connected with the flocculation filtering mechanism through a conveying pump, and the flocculation filtering mechanism is connected with the secondary filtering mechanism through a water suction pump. A lifting assembly is designed to facilitate cleaning of the primary filtering net plate, an adjusting assembly is additionally arranged in the flocculation filtering mechanism to achieve automatic adjustment of the position of a water pipe to meet the solid-liquid separation requirement, the whole process of the filtering device designed by the invention is more automatic, the sewage treatment efficiency is improved, and the sewage treatment effect is enhanced.

Description

Technical Field

[0001] The present invention relates to the technical field of sewage treatment and filtration, and particularly to a self-draining sewage filtration device. Background Art

[0002] A sewage body refers to a water body polluted by human activities or natural factors, with water quality indicators exceeding the functional requirements of natural water bodies, and which needs to be treated before it can be reused or discharged.

[0003] During the sewage treatment process, it is first necessary to filter out large particulate impurities in the sewage through a grid, such as garbage or branches, etc. Subsequently, impurities such as sand and gravel inside are filtered out by the sedimentation method. However, this filtering and treatment method not only takes a long time, but it is also not easy to clean the impurities filtered out on the grid.

[0004] After the initial filtration of the sewage, flocculants are added to cause the suspended substances in the sewage to coalesce into larger particles, facilitating subsequent sedimentation and filtration operations. Flocculation can effectively remove suspended substances, colloidal substances, and some dissolved substances in the sewage, improving the purification effect of the water quality. Commonly used flocculants include inorganic flocculants and organic flocculants. Inorganic flocculants include aluminum salts, iron salts, etc., which can react chemically with colloidal particles in the sewage to cause them to coalesce into larger particles. Organic flocculants are mostly high-molecular compounds, such as polyacrylamide, polyvinyl alcohol, etc., which aggregate suspended substances together through charge adsorption and bridging effects. After the flocs precipitate, a water pump is required to pump out the clear water on the upper layer of the precipitate to complete the solid-liquid separation. However, since the volume of each precipitate is different each time, it is necessary to manually adjust the height position of the water suction pipe before each water pumping, and the treatment process is very inconvenient.

[0005] In order to solve the above problems, a self-draining sewage filtration device is proposed. Summary of the Invention

[0006] According to the above existing technical problems, the present invention provides a self-draining sewage filtration device, and the entire process of the filtration device is more automated, not only improving the sewage treatment efficiency but also enhancing the sewage treatment effect.

[0007] To achieve the above object, the technical solution of the present invention is as follows: A self-draining sewage filtration device, characterized in that it includes a primary filtration mechanism, an aeration tank, a flocculation filtration mechanism, and a secondary filtration mechanism. The primary filtration mechanism is arranged beside the aeration tank, and the water outlet of the primary filtration mechanism is connected to the water inlet of the aeration tank. The water outlet of the aeration tank is connected to the flocculation filtration mechanism through a delivery pump, and the flocculation filtration mechanism is connected to the secondary filtration mechanism through a water pump. The primary filtration mechanism is composed of a filter cylinder, a cylinder cover, a primary filter screen plate, a lifting assembly, and an anti-accumulation assembly. A cylinder cover is arranged at the top opening of the filter cylinder. The cylinder cover is connected to the lifting assembly installed on the filter cylinder. A primary filter screen plate is arranged inside the filter cylinder. The primary filter screen plate is installed below the cylinder cover through a connecting rod. An anti-accumulation assembly is arranged above the primary filter screen plate. The lifting assembly includes a lifting motor, a fixing frame, a lead screw, a moving block, a lifting rod, and a connecting plate. The fixing frame is fixedly installed on the outer wall of the filter cylinder through bolts. A lead screw is installed in a moving groove provided on the fixing frame through a bearing. The lower end of the lead screw is connected to the output end of the lifting motor. The moving block is threadedly connected to the lead screw. The lower end of the lifting rod is fixed to the moving block, and the upper end is connected to the connecting plate. The connecting plate is fixedly installed on the cylinder cover through bolts.

[0008] The anti-accumulation assembly includes a rotating motor, a rotating shaft, a rotating rod, and a cleaning brush. The rotating motor is installed on the cylinder cover. The output end of the rotating motor is connected to the upper end of the rotating shaft. The rotating shaft passes through the cylinder cover and extends into the filter cylinder, and a rotating rod is fixed to the bottom of the rotating shaft. A cleaning brush is arranged below the rotating rod.

[0009] Further, the cleaning brush is in contact with the primary filter screen plate.

[0010] The flocculation filtration mechanism is composed of a flocculation cylinder, a stirring and mixing assembly, an adjustment assembly, and an ultrasonic sludge level gauge. A stirring and mixing assembly is installed on the flocculation cylinder. The water pipe provided at the water inlet end of the water pump passes through a through hole provided at the top of the flocculation cylinder and extends into the flocculation cylinder. The water pipe is connected to the adjustment assembly installed on the top of the flocculation cylinder. An ultrasonic sludge level gauge for detecting the height of flocculation precipitation is arranged at the top of the flocculation cylinder.

[0011] The stirring and mixing assembly includes a stirring motor and a stirring rod. The stirring motor is installed on the top of the flocculation cylinder. The output end of the stirring motor is connected to the stirring rod. The adjustment assembly includes an adjustment frame, an adjustment motor, a screw rod, and an adjustment block. The adjustment frame is fixedly arranged on the top of the flocculation cylinder. A screw rod is installed in an adjustment groove provided on the adjustment frame through a bearing. One end of the screw rod is connected to the output end of the adjustment motor. One end of the adjustment block is threadedly connected to the screw rod, and the other end is fixedly sleeved on the water pipe.

[0012] Further, the water inlet of the flocculation cylinder is connected to the water outlet end of the delivery pump. A feeding port is arranged at the top of the flocculation cylinder for feeding a flocculant.

[0013] Further, a uniform box is arranged on the upper part of the stirring rod. Through holes are provided on the bottom wall and the side wall of the uniform box, and the discharge pipe of the feeding port is located above the opening end of the uniform box.

[0014] Further, a sludge discharge port is provided at the bottom of the flocculation cylinder, and a control valve is installed at the sludge discharge port.

[0015] Further, a transparent observation port is provided on the side wall of the flocculation cylinder, facilitating the staff to check the internal situation.

[0016] The secondary filtration mechanism is composed of a filtration tank, an activated carbon filtration layer and a filtration component. The water inlet of the filtration tank is connected to the water outlet end of the water pump. Another single of the filtration tank is provided with a drain port. Inside the filtration tank, the filtration component and the activated carbon filtration layer are sequentially arranged in the direction from water inlet to water outlet. Multiple groups of card slots are arranged on the two inner side walls of the filtration tank in a relative position. The activated carbon filtration layer and the filtration component are both inserted into the card slots.

[0017] Further, the filtration component is composed of multiple filter mesh plates. The filtration apertures on the multiple filter mesh plates are all different. The filter mesh plates in the filtration tank are installed in the order of decreasing filtration aperture from large to small, so as to realize multi-stage filtration of the sewage and further filter out impurities in the sewage.

[0018] Further, a controller is provided on the flocculation cylinder. The controller is electrically connected to the ultrasonic sludge level gauge and the adjustment motor respectively.

[0019] Advantages of the present invention: In the primary filtration mechanism for the filtration treatment of sewage in the design of the present invention, the primary filter mesh plate is used to perform primary filtration on the sewage entering the filtration cylinder, filtering out larger impurities and impurities such as sand and gravel in the sewage body. And an anti-accumulation component is designed. During the filtration process, the rotation motor controls the cleaning brush on the primary filter mesh plate to rotate, avoiding blockage caused by the accumulation of impurities on the primary filter mesh plate and reducing the filtration efficiency. The lifting component designed in the present invention can be started when cleaning the impurities on the primary filter mesh plate. The lifting motor controls the cylinder cover and the primary filter mesh plate to move out of the filtration cylinder, greatly facilitating the manual cleaning operation. In the present invention, by adding an adjustment component and an ultrasonic sludge level gauge on the flocculation cylinder, after each flocculation operation on the sewage, the ultrasonic sludge level gauge monitors the height of the flocculated sludge at this time, and transmits it to the controller. The controller starts the adjustment motor in the adjustment component to control the end of the water pipe to move to a suitable position to pump out the liquid in the flocculation cylinder for solid-liquid separation, without the need for manual adjustment of the position of the water pipe each time, which not only reduces the manual labor burden but also improves the filtration treatment efficiency. The secondary filtration mechanism designed by the present invention greatly improves the sewage treatment effect by filtering the sewage after flocculation operation layer by layer. Moreover, the filtration components and the activated carbon filtration layer in the filtration tank are installed in the filtration tank by means of snap connection, making the disassembly and assembly of the filtration components convenient and facilitating subsequent cleaning and replacement operations. When the height of the sewage is higher than the height of the drainage outlet of the filtration tank, the sewage in the filtration tank will be automatically discharged. BRIEF DESCRIPTION OF THE DRAWINGS

[0020] Figure 1 FIG. 1 is a top view schematic diagram of the overall structure of a self-draining sewage filtration device of the present invention; Figure 2 FIG. 2 is a rear view schematic diagram of the overall structure of a self-draining sewage filtration device of the present invention; Figure 3 FIG. 3 is a schematic diagram of the structure when cleaning the primary filtration mechanism of a self-draining sewage filtration device of the present invention; Figure 4 FIG. 4 is a schematic diagram of the structure when cleaning the secondary filtration mechanism of a self-draining sewage filtration device of the present invention; Figure 5 FIG. 5 is a partial structure schematic diagram of the adjustment component of a self-draining sewage filtration device of the present invention; Figure 6 FIG. 6 is a sectional structure schematic diagram of the flocculation mechanism of a self-draining sewage filtration device of the present invention; As shown in the figure: 1. Filter cylinder, 2. Cylinder cover, 31. Rotating motor, 32. Rotating shaft, 33. Rotating rod, 34. Cleaning brush, 4. Primary filter screen plate, 41. Connecting rod, 51. Fixed frame, 52. Lifting motor, 53. Lead screw, 54. Moving block, 55. Lifting rod, 56. Connecting plate, 6. Aeration tank, 61. Delivery pump, 7. Flocculation cylinder, 71. Feeding port, 711. Discharge pipe, 72. Sludge discharge port, 73. Transparent observation port, 81. Stirring motor, 82. Stirring rod, 83. Uniform box, 90. Ultrasonic sludge level gauge, 91. Adjusting frame, 92. Adjusting motor, 93. Screw rod, 94. Adjusting block, 10. Water pump, 101. Water pipe, 11. Filtration tank, 111. Drainage outlet, 112. Card slot, 12. Activated carbon filtration layer, 13. Filter net, 14. Controller. DETAILED DESCRIPTION OF THE EMBODIMENTS

[0021] Next, the technical solutions of the present invention will be clearly and completely described in conjunction with the accompanying drawings. Obviously, the described embodiments are some, but not all, of the embodiments of the present invention. All other embodiments obtained by those of ordinary skill in the art based on the embodiments of the present invention without creative efforts shall fall within the protection scope of the present invention.

[0022] In the description of the present invention, it should be noted that the orientation or positional relationship indicated by the terms "center", "upper", "lower", "left", "right", "vertical", "horizontal", "inner", "outer", etc. is based on the orientation or positional relationship shown in the drawings. It is only for the convenience of describing the present invention and simplifying the description, rather than indicating or implying that the device or element referred to must have a specific orientation, be constructed and operated in a specific orientation, and therefore should not be construed as a limitation to the present invention.

[0023] In the description of the present invention, it should be noted that unless otherwise clearly specified and defined, the terms "installation", "connection", and "connection" 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 directly connected or indirectly connected through an intermediate medium, and it can be the communication inside two elements. For those of ordinary skill in the art, the specific meanings of the above terms in the present invention can be understood according to specific situations. In addition, the technical features involved in different embodiments of the present invention described below can be combined with each other as long as they do not conflict with each other.

[0024] Embodiment 1

[0025] As Figure 2 shown, the primary filtering mechanism is composed of a filter cylinder 1, a cylinder cover 2, a primary filter mesh plate 4, a lifting assembly, and an anti-accumulation assembly. A cylinder cover 2 is arranged at the top opening of the filter cylinder 1. The cylinder cover 2 is connected to the lifting assembly installed on the filter cylinder. The fixed frame 51 in the lifting assembly is fixedly installed on the outer wall of the filter cylinder 1 by bolts. A lead screw 53 is installed in the moving groove provided on the fixed frame 51 through a bearing. The lower end of the lead screw 53 is connected to the output end of the lifting motor 52. A moving block 54 is threadedly connected to the lead screw 53. The lower end of the lifting rod 55 is fixed on the moving block 54, and the upper end is connected to the connecting plate 56. The connecting plate 56 is fixedly installed on the cylinder cover 2 by bolts. As Figure 3 , a primary filter mesh plate 4 is arranged inside the filter cylinder 1. The primary filter mesh plate 4 is installed below the cylinder cover 2 through a connecting rod 41, and an anti-accumulation assembly is arranged above the primary filter mesh plate 4. The anti-accumulation assembly includes a rotating motor 31, a rotating shaft 32, a rotating rod 33, and a cleaning brush 34. The rotating motor 31 is installed on the cylinder cover 2. The output end of the rotating motor 31 is connected to the upper end of the rotating shaft 32. The rotating shaft 32 passes through the cylinder cover 2 and extends into the filter cylinder 1, and a rotating rod 33 is fixed to the bottom of the rotating shaft 32. A cleaning brush 34 is arranged below the rotating rod 33. Further, the cleaning brush 34 is in contact with the primary filter mesh plate 5.

[0026] One side of the upper end of the filter cartridge 1 is provided with a water inlet, which is connected to the sewage pipeline to allow sewage to enter the filter cartridge 1. One side of the lower end is provided with a water outlet connected to the aeration tank 6, and the sewage after primary filtration enters the aeration tank 6 for aeration treatment.

[0027] The water outlet of the aeration tank 6 is connected to the flocculation and filtration mechanism through a delivery pump 61, and the sewage after aeration treatment is transported to the flocculation cylinder 7. As Figure 6 shown, a stirring and mixing assembly is installed on the flocculation cylinder 7. The stirring and mixing assembly includes a stirring motor 81 and a stirring rod 82. The stirring motor 81 is installed on the top of the flocculation cylinder 7, and the output end of the stirring motor 81 is connected to the stirring rod 82. The sewage and the flocculant are stirred and mixed by the stirring rod 82. A uniform box 83 is arranged on the upper part of the stirring rod 82. Through holes are provided on the bottom wall and the side wall of the uniform box 83. A feeding port 71 is arranged on the top of the flocculation cylinder 7. The pipe orifice of the discharge pipe of the feeding port 71 is located above the opening end of the uniform box 83, so that the flocculant enters from the feeding port 71 and falls into the uniform box 83. The uniform box 83 rotates with the stirring rod 82, and the internal flocculant is dispersed out through the through holes on the side wall under the centrifugal action, and is better mixed with the sewage, enhancing the flocculation effect.

[0028] When solid-liquid separation is carried out in the flocculation cylinder 7, the sewage after the flocculation reaction is pumped to the secondary filtration mechanism by a water pump 10. The water pipe 101 arranged at the water inlet end of the water pump 10 passes through the through hole arranged on the top of the flocculation cylinder 7 and extends into the flocculation cylinder 7. The water pipe 101 is connected to the adjustment assembly installed on the top of the flocculation cylinder 7 to realize the adjustment of the height position of the end of the water pipe 101. As Figure 5 shown, the adjustment frame 91 in the adjustment assembly is fixedly arranged on the top of the flocculation cylinder 7. A screw rod 93 is installed in the adjustment groove arranged on the adjustment frame 91 through a bearing. One end of the screw rod 93 is connected to the output end of the adjustment motor 92. One end of the adjustment block 94 is threadedly connected to the screw rod 93, and the other end is fixedly sleeved on the water pipe 101.

[0029] As Figure 6 shown, an ultrasonic sludge level gauge 90 for detecting the height of the flocculation precipitate is arranged on the top of the flocculation cylinder 7, and a controller 14 is arranged on the flocculation cylinder 7. The controller 14 is electrically connected to the ultrasonic sludge level gauge 90 and the adjustment motor 92 respectively.

[0030] Furthermore, a sludge discharge port 72 is arranged at the bottom of the flocculation cylinder 7, and a control valve is installed at the sludge discharge port 72. A transparent observation port 73 is arranged on the side wall of the flocculation cylinder 7, which is convenient for the staff to check the internal situation.

[0031] The flocculated sewage is pumped into the filter tank 11 of the secondary filtration mechanism by the water pump 10. A drain port 111 is provided at the other end of the filter tank 11. A filter component and an activated carbon filter layer 12 are sequentially arranged in the filter tank 111 from the water inlet to the water outlet direction. As Figure 4 On the inner walls on both sides of the filter tank 11, a plurality of card slots 112 are arranged in a relative position. The activated carbon filter layer 12 and the filter component are both inserted into the card slots 112, making the disassembly and assembly of the filter components in the filter tank 11 convenient and facilitating subsequent cleaning and replacement operations.

[0032] Furthermore, the filter component is composed of a plurality of filter mesh plates 13. The filter pore diameters on the plurality of filter mesh plates 13 are all different. The filter mesh plates are installed in the filter tank 11 in the order of decreasing filter pore diameter, so as to achieve multi-stage filtration of the sewage and further filter out impurities in the sewage.

[0033] Embodiment 2

[0034] When the present invention is in use, sewage enters the filter cylinder 1. The primary filter mesh plate 4 is used to perform primary filtration on the sewage entering the filter cylinder 1, filtering out larger impurities and impurities such as sand and gravel in the sewage body. And an anti-accumulation component is designed. During the filtration process, the rotation motor 31 controls the cleaning brush 34 on the primary filter mesh plate 4 to rotate, avoiding blockage caused by the accumulation of impurities on the primary filter mesh plate 4 and reducing the filtration efficiency.

[0035] When it is necessary to clean the impurities on the primary filter mesh plate 4, the lifting motor 52 in the lifting component is started. The lifting motor 52 and the lead screw 53 are used to control the lifting rod 56 to move upward, driving the cylinder cover 2 and the primary filter mesh plate 4 to move out of the filter cylinder 1, greatly facilitating the manual cleaning operation.

[0036] The sewage after primary filtration enters the flocculation cylinder 7 after being aerated in the aeration tank 6. The stirring motor 81 is used to control the stirring rod 82 to mix the flocculant with the sewage, causing the sewage to react. Each time after the sewage is flocculated, the ultrasonic sludge level gauge 90 at the top is used to monitor the height of the flocculated sludge at this time, and it is transmitted to the controller 14. The controller 14 starts the adjusting motor 92 in the adjusting component. The screw 93 causes the adjusting block 94 to move axially, thereby controlling the up and down movement of the end of the water pipe 101, adjusting the end port of the water pipe 101 to a suitable position, and pumping out the liquid in the flocculation cylinder 7 for solid-liquid separation. There is no need for manual adjustment of the position of the water pipe each time, which not only reduces the manual labor burden but also improves the filtration efficiency.

[0037] The sewage after the flocculation operation enters the filtration tank 11 for layer-by-layer filtration, greatly improving the sewage treatment effect. Moreover, the filtration components and the activated carbon filtration layer 12 in the filtration tank are all installed in the filtration tank 11 by means of snap connection, making the disassembly and assembly of the filtration components convenient and facilitating subsequent cleaning and replacement operations. And when the height of the sewage to be treated is higher than the height of the drain outlet 111 of the filtration tank 11, the sewage in the filtration tank 11 will automatically drain out.

[0038] The above shows and describes the basic principles, main features and advantages of the present invention. Each component mentioned in the present invention is a common technology in the existing field. Those skilled in the art should understand that the present invention is not limited by the above embodiments. What is described in the above embodiments and the specification only illustrates the principle of the present invention. Without departing from the spirit and scope of the present invention, the present invention will have various changes and improvements, and these changes and improvements all fall within the scope of the present invention claimed. The scope of protection claimed by the present invention is defined by the appended claims and their equivalents.

Claims

1. A self-draining sewage filtering device, characterized in that It includes a primary filtration mechanism, an aeration tank, a flocculation filtration mechanism and a secondary filtration mechanism. The primary filtration mechanism is arranged beside the aeration tank, and the water outlet of the primary filtration mechanism is connected to the water inlet of the aeration tank. The water outlet of the aeration tank is connected to the flocculation filtration mechanism through a delivery pump, and the flocculation filtration mechanism is connected to the secondary filtration mechanism through a water extraction pump.

2. The self-draining water body filtering device according to claim 1, characterized in that The primary filtration mechanism is composed of a filter cylinder, a cylinder cover, a primary filter screen plate, a lifting assembly and an anti-accumulation assembly. A cylinder cover is arranged at the top opening of the filter cylinder. The cylinder cover is connected to the lifting assembly installed on the filter cylinder. A primary filter screen plate is arranged inside the filter cylinder. The primary filter screen plate is installed below the cylinder cover through a connecting rod, and an anti-accumulation assembly is arranged above the primary filter screen plate.

3. The self-draining water body filtering device according to claim 2, characterized in that The lifting assembly includes a lifting motor, a fixed frame, a lead screw, a moving block, a lifting rod and a connecting plate. The fixed frame is fixedly installed on the outer wall of the filter cylinder through bolts. A lead screw is installed in the moving groove arranged on the fixed frame through a bearing. The lower end of the lead screw is connected to the output end of the lifting motor. The moving block is threadedly connected to the lead screw. The lower end of the lifting rod is fixed on the moving block, and the upper end is connected to the connecting plate. The connecting plate is fixedly installed on the cylinder cover through bolts.

4. The self-draining water body filtering device according to claim 2, characterized in that The anti-accumulation assembly includes a rotating motor, a rotating shaft, a rotating rod and a cleaning brush. The rotating motor is installed on the cylinder cover. The output end of the rotating motor is connected to the upper end of the rotating shaft. The rotating shaft passes through the cylinder cover and extends into the filter cylinder, and a rotating rod is fixed to the bottom of the rotating shaft. A cleaning brush is arranged below the rotating rod, and the cleaning brush is in contact with the primary filter screen plate.

5. The self-draining water body filtering device according to claim 1, wherein The flocculation filtration mechanism is composed of a flocculation cylinder, a stirring and mixing assembly, an adjusting assembly and an ultrasonic sludge level gauge. A stirring and mixing assembly is installed on the flocculation cylinder. The water pipe arranged at the water inlet end of the water extraction pump passes through the through hole arranged at the top of the flocculation cylinder and extends into the flocculation cylinder. The water pipe is connected to the adjusting assembly installed on the top of the flocculation cylinder. An ultrasonic sludge level gauge for detecting the height of flocculation precipitation is arranged at the top of the flocculation cylinder.

6. The self-draining water body filtering device according to claim 5, wherein The adjusting assembly includes an adjusting frame, an adjusting motor, a screw rod and an adjusting block. The adjusting frame is fixedly arranged at the top of the flocculation cylinder. A screw rod is installed in the adjusting groove arranged on the adjusting frame through a bearing. One end of the screw rod is connected to the output end of the adjusting motor. One end of the adjusting block is threadedly connected to the screw rod, and the other end is fixedly sleeved on the water pipe.

7. The self-draining water body filtering device according to claim 5, characterized in that The water inlet on the flocculation cylinder is connected to the water outlet end of the delivery pump, and a feeding port is arranged at the top of the flocculation cylinder.

8. The self-draining water body filtering device according to claim 7, wherein The stirring and mixing assembly includes a stirring motor and a stirring rod. The stirring motor is installed at the top of the flocculation cylinder. The output end of the stirring motor is connected to the stirring rod. A uniform box is arranged on the upper part of the stirring rod. Through holes are arranged on the bottom wall and side walls of the uniform box, and the discharge pipe of the feeding port is located above the opening end of the uniform box.

9. The self-draining water body filtering device according to claim 1, characterized in that The secondary filtration mechanism is composed of a filtration tank, an activated carbon filtration layer, and a filtration component. The water inlet of the filtration tank is connected to the water outlet end of the water pump. Another single port of the filtration tank is provided with a drainage port. Inside the filtration tank, the filtration component and the activated carbon filtration layer are sequentially arranged in the direction from water inlet to water outlet. A plurality of card slots are arranged in opposite positions on the inner walls of both sides of the filtration tank. The activated carbon filtration layer and the filtration component are both inserted into the card slots.

10. The self-draining water body filtering device according to claim 9, characterized in that The filtration component is composed of a plurality of filter mesh plates. The filtration pore diameters on the plurality of filter mesh plates are all different. The filter mesh plates are installed in the filtration tank in the order of decreasing filtration pore diameter from large to small, so as to realize multi-stage filtration of sewage and further filter out impurities in the sewage.

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