Sewage treatment tank

Abstract

The utility model belongs to the technical field of sewage treatment devices, and particularly relates to a sewage treatment tank which comprises a base, a box body is fixedly mounted on the mounting frame, a filtering mechanism is fixedly mounted at the upper end of the box body, and the filtering mechanism comprises an arc-shaped shell; the arc-shaped shell is fixedly mounted in the mounting groove of the box body, and the arc-shaped shell is obliquely arranged; a filter screen is arranged at the position, covering the upper portion of the containing cavity of the box body, of the arc-shaped shell, and filter holes of the filter screen are communicated with the containing cavity. A water inlet pipe rack is fixedly mounted on the outer side of the circular plate positioned at the upper end of the arc-shaped shell; a cleaning assembly is rotationally connected between the two circular plates and rotationally arranged in the arc-shaped shell. The cleaning assembly comprises a rotating shaft and a brushing part; sewage is used as power to push the driving plate to rotate, so that the rotating shaft and the brushing part are driven to rotate, the brushing part rotates to brush and clean the inner wall of the arc-shaped shell and the filter screen, real-time filtering and cleaning are carried out without depending on a motor and manpower, and the device is convenient, energy-saving, manpower-saving and material-saving.

Description

Technical Field

[0001] The utility model belongs to the technical field of sewage treatment devices, and in particular relates to a sewage treatment box. Background Art

[0002] As a key component of the sewage treatment system, the primary filter box for sewage treatment is usually at the front end of the sewage treatment process. Its core function is to preliminarily remove larger solid impurities and suspended matter in the sewage. The primary filter box is usually equipped with filter media such as filter screens or grilles. When the sewage flows into the filter box, these filter media can effectively block larger particulate matter such as branches, leaves, plastic bags, stones, etc. Through this primary filtration link, such larger impurities can be prevented from entering the subsequent treatment process, avoiding the risk of clogging and damage to the treatment equipment. At the same time, it also significantly reduces the burden of subsequent treatment processes, creating favorable conditions for subsequent more sophisticated sewage treatment steps, thereby improving the efficiency and stability of the entire sewage treatment system.

[0003] The Chinese patent with the announcement number "CN219615014U" discloses a sewage treatment box, a water inlet pipe, a water outlet pipe, a filter assembly, a cleaning port, a sealing door and a cleaning assembly. The water inlet pipe is fixedly installed on the right side of the sewage treatment box, the water outlet pipe is fixedly installed on the bottom of the left front side of the sewage treatment box, the cleaning port is opened on the top of the sewage treatment box, and the front side of the sewage treatment box is provided with a square through hole, the rear side of the square through hole is interconnected with the interior of the sewage treatment box, and a block is provided inside the square through hole. The utility model can use the filter assembly to achieve primary filtration by setting up a sewage treatment box, a water inlet pipe, a water outlet pipe, a filter assembly, a cleaning port, a sealing door and a cleaning assembly for coordinated use. At the same time, the filter net is cleaned by the cleaning assembly to prevent the filter net from being blocked, thereby solving the problem of the existing inability to perform primary filtration. The sewage treatment box has the advantage of primary filtration;

[0004] However, during the use of the above equipment, although the brush plate is used to assist in cleaning, if the filter needs to be cleaned during the cleaning process, it is obviously necessary to manually push the brush plate to move and rely on manual pushing to assist in brushing and cleaning. As a result, its use process is relatively labor-intensive, and it is difficult to clean and collect the filtered impurities in real time during use. The overall operation is relatively cumbersome and inconvenient, so it needs to be improved. Utility Model Content

[0005] The purpose of the utility model is to provide a sewage treatment box, aiming to solve one of the technical problems existing in the prior art.

[0006] To achieve the above-mentioned purpose, the utility model provides a sewage treatment box, comprising a base; support legs are fixedly installed at the four corners of the top of the base, a mounting frame is fixedly installed on the top of the support legs, a box body is fixedly installed on the mounting frame, a filter mechanism is fixedly installed on the upper end of the box body, a drain valve is fixedly installed in the middle of the lower end of the front of the box body, and the input end of the drain valve is connected to the inside of the box body;

[0007] The filtering mechanism comprises an arc-shaped shell; a mounting groove is provided at the upper end of the box body, a receiving cavity is provided inside the box body, the arc-shaped shell body is fixedly installed in the mounting groove of the box body, and the arc-shaped shell body is arranged obliquely; circular plates are fixedly installed at both ends of the arc-shaped shell body, a filter screen is provided at a position where the arc-shaped shell body covers the receiving cavity of the box body, and the filter holes of the filter screen are communicated with the receiving cavity; a water inlet pipe rack is fixedly installed on the outer side of the circular plate located at the upper end of the arc-shaped shell body, and a discharge groove is provided at the lower end of the circular plate located at the lower end of the arc-shaped shell body; a cleaning assembly is rotatably connected between the two circular plates, and the cleaning assembly is rotatably arranged in the arc-shaped shell body;

[0008] Among them, the cleaning assembly includes a rotating shaft and a brushing component; the two ends of the rotating shaft are respectively rotatably connected to the two circular plates, and the brushing component is fixedly installed on the end of the rotating shaft close to the discharge trough for brushing the arc-shaped shell and the filter; a plurality of driving plates are fixedly installed at equal intervals on the outer surface of the end of the rotating shaft close to the water inlet pipe rack, and the output end of the water inlet pipe rack passes through the circular plate located on the upper side of the arc-shaped shell and is fixedly installed with a guide inclined pipe, and the guide inclined pipe is inclined to one side and faces the driving plate.

[0009] Optionally, the brushing component includes a plurality of mounting frames; the plurality of mounting frames are fixedly mounted at equal intervals on the outer surface of one end of the rotating shaft close to the discharge trough, and a brush plate is fixedly mounted on the outer side of each mounting frame, and the bristles of the brush plate abut against the inner wall of the arc-shaped shell and the filter.

[0010] Optionally, the box body is provided with a waste residue collection assembly below the discharge chute.

[0011] Optionally, the waste slag collection assembly includes a collection frame; the collection frame is fixedly mounted on a side of the box body close to the discharge chute, the interior of the collection frame is slidably connected to a waste slag box, the waste slag box has an upper box opening, and the upper box opening is located directly below the discharge chute.

[0012] Optionally, a hand-tightened screw is threadedly connected to an upper end of one side of the collecting frame, and an end of the hand-tightened screw passes through the collecting frame and is fitted and connected to the outer side of the waste slag box. The waste slag box can be fixed and loosened by twisting the hand-tightened screw.

[0013] Optionally, disinfection mechanisms are fixedly installed in the middle of both sides of the interior of the box, and the disinfection mechanisms are used to sterilize the interior of the box.

[0014] Optionally, the disinfection mechanism includes a substrate; the substrate is fixedly installed in the middle of both sides of the box, a mounting seat is fixedly installed on one side of the substrate located inside the box, and a plurality of ultraviolet sterilization lamps are fixedly installed at equal intervals on the inner side of the mounting seat.

[0015] Optionally, a connecting flange is fixedly mounted on the input end of the water inlet pipe rack, and the water inlet pipe rack is used to quickly connect to an external sewage supply pipeline through the connecting flange.

[0016] Optionally, a plurality of mounting holes are formed at equal intervals on the outer side of the connecting flange, and the mounting holes are configured as countersunk holes.

[0017] Optionally, both ends of the rotating shaft are rotatably connected to the two circular plates via bearings.

[0018] Compared with the prior art, the above one or more technical solutions in the sewage treatment tank provided by the embodiment of the utility model have at least one of the following technical effects:

[0019] During operation, the external sewage supply pipeline is connected through the input end of the water inlet pipe rack, and the sewage is input into the diversion inclined pipe through the water inlet pipe rack. The diversion inclined pipe guides the sewage and sprays it to the driving plate. The sewage is used as power to drive the driving plate to rotate, thereby driving the rotating shaft and the brushing component to rotate. The brushing component rotates to brush and clean the inner wall and filter of the arc-shaped shell to perform real-time filtering and cleaning. The entire cleaning process does not require an external drive, does not rely on motors and manpower, is driven by water flow, is convenient and energy-saving, can filter and clean in real time, and saves manpower and material resources.

[0020] In addition, sewage enters the arc-shaped shell from the upper side of the arc-shaped shell, and is filtered through the filter screen in the arc-shaped shell. Since the arc-shaped shell is inclined, the waste residue filtered out of the sewage is discharged from the discharge trough along the arc-shaped shell due to the inclined setting of the arc-shaped shell and the rotation of the brushing component. BRIEF DESCRIPTION OF THE DRAWINGS

[0021] In order to more clearly illustrate the technical solutions in the embodiments of the present invention, 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 labor.

[0022] Figure 1 This is a schematic structural diagram of a sewage treatment tank provided in an embodiment of the utility model.

[0023] Figure 2 Another perspective view of the sewage treatment tank provided in an embodiment of the utility model.

[0024] Figure 3 A schematic diagram of the structure of a filtering mechanism provided in an embodiment of the utility model.

[0025] Figure 4 A schematic diagram of the structure of a disinfection mechanism provided in an embodiment of the utility model.

[0026] Among them, the reference numerals in the figure are:

[0027] 1. Base; 2. Support legs; 3. Mounting frame; 4. Box; 41. Mounting slot; 5. Drain valve;

[0028] 6. Filter mechanism; 61. Arc-shaped housing; 611. Filter screen; 62. Circular plate; 63. Water inlet pipe rack; 64. Discharge chute; 65. Cleaning assembly; 650. Brushing component; 651. Rotating shaft; 652. Mounting frame; 653. Brush plate; 654. Driving plate; 655. Diversion inclined pipe; 656. Connecting flange; 66. Water retaining plate;

[0029] 7. Waste slag collection assembly; 71. Collection frame; 72. Waste slag box; 721. Upper box opening; 73. Hand-tightening screw;

[0030] 8. Disinfection mechanism; 81. Base plate; 82. Mounting base; 83. Ultraviolet germicidal lamp. DETAILED DESCRIPTION

[0031] The embodiments of the present invention are described in detail below, and examples of the embodiments are shown in the accompanying drawings, wherein the same or similar reference numerals throughout represent the same or similar elements or elements having the same or similar functions. The embodiments described below with reference to the accompanying drawings are exemplary and are intended to be used to explain the embodiments of the present invention, and should not be construed as limiting the present invention.

[0032] In the description of the embodiments of the present invention, it should be understood that the terms "length", "width", "up", "down", "front", "back", "left", "right", "vertical", "horizontal", "top", "bottom", "inside", "outside", etc., indicating the orientation or position relationship, are based on the orientation or position relationship shown in the accompanying drawings, and are only for the convenience of describing the embodiments of 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 cannot be understood as a limitation on the present invention.

[0033] In addition, the terms "first" and "second" are used for descriptive purposes only and should not be understood as indicating or implying relative importance or implicitly indicating the number of the indicated technical features. Therefore, the features defined as "first" and "second" may explicitly or implicitly include one or more of the features. In the description of the embodiments of the present utility model, the meaning of "multiple" is two or more, unless otherwise clearly and specifically defined.

[0034] In the embodiments of the present invention, unless otherwise clearly specified and limited, the terms "installed", "connected", "connected", "fixed" and the like 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 an indirect connection through an intermediate medium, it can be the internal connection of two elements or the interaction relationship between two elements. For ordinary technicians in this field, the specific meanings of the above terms in the embodiments of the present invention can be understood according to specific circumstances.

[0035] In one embodiment of the present invention, referring to Figure 1-Figure 4 , a sewage treatment tank is provided, comprising a base 1.

[0036] Among them, refer to Figure 1 and Figure 2 The four corners of the top of the base 1 are fixedly installed with supporting legs 2, the top of the supporting legs 2 is fixedly installed with a mounting frame 3, a box 4 is fixedly installed on the mounting frame 3, a filtering mechanism 6 is fixedly installed on the upper end of the box 4, and a drain valve 5 is fixedly installed in the middle of the lower end of the front side of the box 4, and the input end of the drain valve 5 is connected to the interior of the box 4.

[0037] Among them, refer to Figure 1 and Figure 2 The filtering mechanism 6 includes an arc-shaped shell 61; the upper end of the box body 4 is provided with a mounting groove 41, the interior of the box body 4 has a receiving cavity, the arc-shaped shell 61 is fixedly installed in the mounting groove 41 of the box body 4, and the arc-shaped shell 61 is arranged in an inclined manner; circular plates 62 are fixedly installed at both ends of the arc-shaped shell 61, and a filter screen 611 is arranged at a position above the receiving cavity of the box body 4 covered by the arc-shaped shell 61, and the filter holes of the filter screen 611 are connected to the receiving cavity; a water inlet pipe rack 63 is fixedly installed outside the circular plate 62 at the upper end of the arc-shaped shell 61, and a discharge groove 64 is arranged at the lower end of the circular plate 62 at the lower end of the arc-shaped shell 61. A cleaning assembly 65 is rotatably connected between the two circular plates 62, and the cleaning assembly 65 is rotatably arranged in the arc-shaped shell 61.

[0038] Among them, refer to Figure 1 and Figure 3The cleaning assembly 65 includes a rotating shaft 651 and a brushing component 650; the two ends of the rotating shaft 651 are respectively rotatably connected to the two circular plates 62, and the brushing component 650 is fixedly installed on one end of the rotating shaft 651 close to the discharge trough 64 for brushing the arc-shaped shell 61 and the filter 611; a plurality of driving plates 654 are fixedly installed at equal intervals on the outer surface of one end of the rotating shaft 651 close to the water inlet pipe rack 63, and the output end of the water inlet pipe rack 63 passes through the circular plate 62 located on the upper side of the arc-shaped shell 61 and is fixedly installed with a guide inclined pipe 655, which is inclined to one side and faces the driving plate 654.

[0039] Compared with the prior art, the above one or more technical solutions in the sewage treatment tank provided by the embodiment of the utility model have at least one of the following technical effects:

[0040] Reference Figure 1-Figure 3 When working, the input end of the water inlet pipe rack 63 is connected to the external sewage supply pipeline, and the sewage is input to the guide inclined pipe 655 through the water inlet pipe rack 63. The guide inclined pipe 655 guides the sewage and sprays it to the driving plate 654. The sewage is used as a power to drive the driving plate 654 to rotate, thereby driving the rotating shaft 651 and the brush rubbing component 650 to rotate. The brush rubbing component 650 rotates to brush and clean the inner wall of the arc-shaped shell 61 and the filter screen 611, and performs real-time filtering and cleaning. The entire cleaning process does not require an external drive, does not rely on a motor and labor, and is driven by water flow. It is convenient and energy-saving, can filter and clean in real time, and saves manpower and material resources. At the same time, the sewage enters the arc-shaped shell 61 from the upper side of the arc-shaped shell 61, and is filtered by the filter screen 611 in the arc-shaped shell 61. Since the arc-shaped shell 61 is inclined, the waste residue filtered out of the sewage is discharged from the discharge trough 64 along the arc-shaped shell 61 due to the inclined setting of the arc-shaped shell 61 and the rotation of the brush rubbing component 650.

[0041] In another embodiment of the present invention, referring to Figure 2 and Figure 3 The brushing component 650 includes a plurality of mounting frames 652; the plurality of mounting frames 652 are fixedly mounted at equal intervals on the outer surface of one end of the rotating shaft 651 close to the discharge trough 64, and a brush plate 653 is fixedly mounted on the outer side of each mounting frame 652, and the bristles of the brush plate 653 abut against the inner wall of the arc-shaped shell 61 and the filter screen 611; the sewage is used as a power to drive the driving plate 654 to rotate, thereby driving the rotating shaft 651 and the plurality of brush plates 653 to rotate, and the plurality of brush plates 653 rotate to brush and clean the inner wall of the arc-shaped shell 61 and the filter screen 611, thereby cleaning the filter screen 611 in real time, maintaining the filtering effect of the filter screen 611, and avoiding blockage.

[0042] In another embodiment of the present invention, referring to Figure 1 and Figure 2The box body 4 is provided with a waste residue collection assembly 7 below the discharge trough 64. The waste residue filtered out of the sewage is discharged from the discharge trough 64 along the arc-shaped shell 61 and falls into the waste residue collection assembly 7, which is convenient for collecting and processing the waste residue.

[0043] Further, refer to Figure 1 and Figure 2 The waste residue collection assembly 7 includes a collection frame 71; the collection frame 71 is fixedly installed on one side of the box body 4 close to the discharge chute 64, and a waste residue box 72 is slidably connected inside the collection frame 71. The waste residue box 72 has an upper box opening 721, and the upper box opening 721 is located directly below the discharge chute 64. The waste residue discharged from the discharge chute 64 falls into the waste residue box 72 from the upper box opening 721 for collection. When the waste residue box 72 is full of waste residue, the waste residue box 72 is taken out from the back of the collection frame 71, and then the empty waste residue box 72 is placed inside the collection frame 71.

[0044] Further, refer to Figure 1 and Figure 2 The upper end of one side of the collecting frame 71 is threadedly connected with a hand-tightened screw rod 73, and the end of the hand-tightened screw rod 73 passes through the collecting frame 71 and is closely connected with the outer side of the waste slag box 72. The waste slag box 72 can be fixed and loosened by twisting the hand-tightened screw rod 73. The operation is simple, and the waste slag box 72 filled with waste slag can be replaced in time, thereby ensuring the continuous waste slag collection work and convenient maintenance.

[0045] In another embodiment of the present invention, referring to Figure 1 and Figure 4 A disinfection mechanism 8 is fixedly installed in the middle of both sides of the box body 4, and the disinfection mechanism 8 is used to sterilize the interior of the box body 4.

[0046] Among them, refer to Figure 1 and Figure 4The disinfection mechanism 8 includes two substrates 81; the two substrates 81 are fixedly mounted on the middle of both sides of the box body 4, and a mounting seat 82 is fixedly mounted on one side of each substrate 81 located inside the box body 4, and a plurality of ultraviolet sterilization lamps 83 are fixedly mounted at equal intervals on the inner side of the mounting seat 82. A liquid level sensor is provided at the bottom of the mounting seat, and the liquid level sensor is used to detect the liquid level of the liquid in the box body 4. When the liquid level in the box body 4 reaches the liquid level sensor, the drain valve 5 is opened to discharge the liquid in the box body 4, so as to avoid the ultraviolet sterilization lamp 83 from being immersed in the liquid in the box body 4, and the structure is reliable. Among them, the liquid level sensor is a mature prior art. When the ultraviolet sterilization lamp 83 is working, it emits ultraviolet rays to sterilize the inside of the box body 4 comprehensively, inhibits the growth of bacteria, and ensures the sanitation of the treated water. Specifically, the ultraviolet sterilization lamp 83 is used to irradiate and sterilize the inside of the box body 4, which can inhibit the growth of bacteria and improve the sanitation. In addition, the setting of the drain valve 5 is adopted during its use, so that the treated water can be quickly discharged, which can improve the convenience of operation during the overall use of the device. The drain valve 5 is preferably a solenoid valve.

[0047] Further, refer to Figure 1 and Figure 2 The input end of the water inlet pipe rack 63 is fixedly mounted with a connecting flange 656, and the water inlet pipe rack 63 is used to quickly connect to an external sewage supply pipe through the connecting flange 656, which is convenient for connection.

[0048] Further, refer to Figure 1 and Figure 2 The outer side of the connection flange 656 is provided with a plurality of mounting holes at equal intervals. The mounting holes are configured as countersunk holes, which are combined with screws to securely connect to an external sewage supply pipe.

[0049] Further, refer to Figure 1-Figure 3 The two ends of the rotating shaft 651 are respectively rotatably connected to the two circular plates 62 by bearings, so that the rotating shaft 651 can rotate smoothly in the arc-shaped housing 61.

[0050] The sewage treatment tank includes an electric control device (not shown), and the disinfection mechanism 8, the drain valve 5 and the liquid level sensor are all electrically connected to the electric control device. In this embodiment, the electric control device can be set up using a PLC or an integrated chip according to actual production needs. Since the electric control device is a mature technology in the prior art, how the electric control device controls the operation of the sewage treatment tank should be well known and mastered by those skilled in the art, so the control principle of the utility model will not be repeated here.

[0051] The rest of this embodiment is the same as the first embodiment. The features not explained in this embodiment are all based on the explanations in the first embodiment and will not be described in detail here.

[0052] The above content is a further detailed description of the utility model in combination with specific preferred implementation methods, and it cannot be determined that the specific implementation of the utility model is limited to these descriptions. For ordinary technicians in the technical field to which the utility model belongs, without departing from the concept of the utility model, its architecture can be flexible and can derive a series of products. Just making a few simple deductions or substitutions should be regarded as belonging to the patent protection scope of the utility model determined by the submitted claims.

Claims

1. A sewage treatment box, comprising a base; support legs are fixedly installed at the four corners of the top of the base, a mounting frame is fixedly installed on the top of the support legs, a box body is fixedly installed on the mounting frame, a filter mechanism is fixedly installed on the upper end of the box body, a drain valve is fixedly installed in the middle of the lower end of the front of the box body, and the input end of the drain valve is connected to the interior of the box body; It is characterized in that The filtering mechanism comprises an arc-shaped shell; a mounting groove is provided at the upper end of the box body, a receiving cavity is provided inside the box body, the arc-shaped shell body is fixedly installed in the mounting groove of the box body, and the arc-shaped shell body is arranged obliquely; circular plates are fixedly installed at both ends of the arc-shaped shell body, a filter screen is provided at a position where the arc-shaped shell body covers the receiving cavity of the box body, and the filter holes of the filter screen are communicated with the receiving cavity; a water inlet pipe rack is fixedly installed on the outer side of the circular plate located at the upper end of the arc-shaped shell body, and a discharge groove is provided at the lower end of the circular plate located at the lower end of the arc-shaped shell body; a cleaning assembly is rotatably connected between the two circular plates, and the cleaning assembly is rotatably arranged in the arc-shaped shell body; Among them, the cleaning assembly includes a rotating shaft and a brushing component; the two ends of the rotating shaft are respectively rotatably connected to the two circular plates, and the brushing component is fixedly installed on the end of the rotating shaft close to the discharge trough for brushing the arc-shaped shell and the filter; a plurality of driving plates are fixedly installed at equal intervals on the outer surface of the end of the rotating shaft close to the water inlet pipe rack, and the output end of the water inlet pipe rack passes through the circular plate located on the upper side of the arc-shaped shell and is fixedly installed with a guide inclined pipe, and the guide inclined pipe is inclined to one side and faces the driving plate.

2. The sewage treatment tank according to claim 1, characterized in that: The brushing component includes a plurality of mounting frames; the plurality of mounting frames are fixedly mounted at equal intervals on the outer surface of one end of the rotating shaft close to the discharge trough, and a brush plate is fixedly mounted on the outer side of each mounting frame, and the bristles of the brush plate abut against the inner wall of the arc-shaped shell and the filter.

3. The sewage treatment tank according to claim 1, characterized in that: The box body is provided with a waste residue collection assembly below the discharge chute.

4. The sewage treatment tank according to claim 3, characterized in that: The waste residue collection assembly includes a collection frame; the collection frame is fixedly installed on one side of the box body close to the discharge chute, and a waste residue box is slidably connected to the inside of the collection frame. The waste residue box has an upper box opening, and the upper box opening is located directly below the discharge chute.

5. The sewage treatment tank according to claim 4, characterized in that: A hand-tightened screw is threadedly connected to the upper end of one side of the collecting frame, and the end of the hand-tightened screw passes through the collecting frame and is fitted and connected to the outer side of the waste slag box. The waste slag box can be fixed and loosened by twisting the hand-tightened screw.

6. The sewage treatment tank according to any one of claims 1 to 5, characterized in that: Disinfection mechanisms are fixedly installed in the middle of both sides of the interior of the box, and the disinfection mechanisms are used to sterilize the interior of the box.

7. The sewage treatment tank according to claim 6, characterized in that: The disinfection mechanism comprises a substrate; the substrate is fixedly mounted at the middle of both sides of the box, a mounting seat is fixedly mounted on one side of the substrate located inside the box, and a plurality of ultraviolet sterilization lamps are fixedly mounted at equal intervals on the inner side of the mounting seat.

8. The sewage treatment tank according to any one of claims 1 to 5, characterized in that: A connecting flange is fixedly mounted on the input end of the water inlet pipe rack, and the water inlet pipe rack is used for quickly connecting to an external sewage supply pipeline through the connecting flange.

9. The sewage treatment tank according to claim 8, characterized in that: A plurality of mounting holes are formed at equal intervals on the outer side of the connecting flange, and the mounting holes are configured as countersunk holes.

10. The sewage treatment tank according to any one of claims 1 to 5, characterized in that: The two ends of the rotating shaft are respectively rotatably connected to the two circular plates via bearings.

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