Building wastewater treatment device

By placing a rotating cleaning ring and a brush bundle on the outer surface of the filter cartridge of the building wastewater treatment device, the cleaning ring and the brush bundle are rotated simultaneously by using the water flow to drive the cleaning ring and the brush bundle to rotate simultaneously, the problem of unsatisfactory effect of cleaning filamentous objects in the filter cartridge holes in the prior art is solved, and efficient cleaning effect is achieved.

CN119838290AInactive Publication Date: 2025-04-18BOTAIKE (NANTONG) BIOTECHNOLOGY CO LTD
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Patent Information

Application Number
CN202510224741.6
Authority / Receiving Office
CN · China
Patent Type
Applications(China)
Current Assignee / Owner
Filing Date
2025-02-27
Publication Date
2025-04-18
Estimated Expiration
Not applicable · inactive patent

AI Technical Summary

Technical Problem

The existing building wastewater treatment device is not effective when cleaning the filamentous objects in the filter cartridge holes, and requires manual secondary cleaning, resulting in low cleaning efficiency.

Method used

A construction wastewater treatment device is designed, using two cleaning rings to cover the outer surface of the filter cartridge, and the cleaning ring is driven to rotate by water flow, and the brush bundle movement is driven. The synchronous rotation of the cleaning ring and the brush bundle is achieved through the connecting unit, and the holes in the filter cartridge are thoroughly cleaned.

Benefits of technology

It significantly improves the cleaning efficiency of the outer surface of the filter cartridge and in the holes, can effectively remove filamentous objects, reduce the need for manual cleaning, and improve the overall cleaning effect.

✦ Generated by Eureka AI based on patent content.

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Abstract

The invention relates to the technical field of sewage treatment, in particular to a building wastewater treatment device which comprises a tank body and a base arranged at the bottom of the tank body, a filter cavity is formed in the tank body, a plurality of brush bundles are arranged in a cleaning ring and used for cleaning a filter cartridge, and a bidirectional driving unit is arranged in the filter cavity and used for driving the brush bundles to rotate. The cleaning ring can rotate when moving, and can drive a plurality of brush bundles to rotate when the cleaning ring ascends or descends to clean the filter cartridge, so that filamentous objects in holes in the filter cartridge are cleaned, the interior of the filter cartridge is cleaned, and water in the filter cartridge is backflushed out synchronously. According to the building wastewater treatment device, the outer surface of the filter cartridge is sleeved with the two cleaning rings, water flow is used for driving the cleaning rings to rotate and driving the brush bundles to move, and the configured linkage unit can not only drive the cleaning rings to move, but also can clean the inner wall of the filter cartridge.
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Description

Technical Field

[0001] The invention relates to the technical field of sewage treatment, in particular to a construction wastewater treatment device. Background Art

[0002] Construction wastewater mainly comes from sewage generated during the construction, maintenance and use of buildings. It contains a large amount of suspended matter, sediment, oil and chemical substances. If it is discharged directly without treatment, it will cause serious pollution to the water body and the ecological environment. The construction wastewater treatment device is to filter the wastewater through pre-treatment, sedimentation and other treatment methods.

[0003] In the existing construction wastewater treatment devices, the inner cavity of the filter cartridge is prone to accumulation and adhesion of stains, which affects its filtration efficiency and service life. At present, the common cleaning method is to use a recoil structure with a scraper for cleaning. However, in actual use, the tiny holes on the surface of the filter cartridge are easily clogged with stains, especially filamentous objects that easily enter the holes, resulting in the existing cleaning methods being difficult to completely remove the stains. Manual secondary cleaning is often required, and the cleaning effect is not ideal. For this reason, we propose a construction wastewater treatment device. Summary of the invention

[0004] A technical problem to be solved by the present application is: how to design a construction wastewater treatment device that can clean filamentous objects in the holes of the filter cartridge and has a better cleaning effect.

[0005] In order to solve the above technical problems, the embodiment of the present application provides a construction wastewater treatment device, including a tank body, a base, a filter chamber and a filter cartridge arranged in the filter chamber, and also includes:

[0006] A cleaning ring, movably sleeved on the outside of the filter cartridge;

[0007] A brush bundle is arranged inside the cleaning ring, and a plurality of brush bundles are evenly arranged and face the filter holes on the filter cartridge;

[0008] A bidirectional driving unit is disposed inside the tank body and connected to the cleaning ring, and is used to drive the cleaning ring to rise and fall outside the filter cylinder;

[0009] The linkage unit is arranged in the tank body and connected to the brush bundle, and the end of the brush bundle extends into the filter hole of the filter cartridge. When the cleaning ring is lifted or lowered, the linkage unit is used to simultaneously drive the brush bundle and the cleaning ring to rotate.

[0010] In some embodiments, the bidirectional drive unit includes a connecting rod arranged on the end face of the brush bundle, the end face of the connecting rod away from the brush bundle passes through a cleaning ring, and a connecting cavity is opened inside the cleaning ring, the connecting rod is arranged in the connecting cavity, and a spline sleeve is provided on the end face of the connecting rod inside the connecting cavity.

[0011] In some embodiments, a tension spring is sleeved on the outer surface of the spline sleeve, one end of which is arranged on the inner wall of the connecting cavity, a spline rod is arranged inside the spline sleeve, a flushing cavity is opened inside the cleaning ring, and the end face of the spline rod passes through the inner wall of the connecting cavity and is arranged in the flushing cavity, and the spline rod is rotatably arranged in the connecting cavity, and for this purpose, the spline sleeve is movably sleeved on the spline rod.

[0012] In some embodiments, a driving rod is provided at the end surface of the spline rod in the flushing cavity, a plurality of blades are provided on the outer surface of the driving rod, a plurality of circular grooves are provided at the upper and lower ends of the cleaning ring, and the plurality of circular grooves are interconnected through the flushing cavity;

[0013] When the water flows into the flushing cavity through the circular groove on the end surface of the cleaning ring, the water flows through the circular groove opened at the other end of the cleaning ring, and the water flow at this time can drive the blades to rotate.

[0014] In some embodiments, the outer surface of the cleaning ring is provided with a plurality of arc grooves, and the end surface of the cleaning ring is provided with a trapezoidal ring, and the end surface of the cleaning ring is provided with a support member for connecting two cleaning rings to each other;

[0015] The arc grooves between the upper and lower cleaning rings are different, so when water flows through, the two cleaning rings can rotate in different directions, which can increase the cleaning area.

[0016] In some embodiments, the support member includes a rotating ring movably arranged on the end face of the cleaning ring, a ring groove is provided on the end face of the cleaning ring close to the rotating ring, the rotating ring is movably arranged in the ring groove, and a connecting plate is provided on the end face of the ring groove, a plurality of balls are movably inlaid on the end face of the rotating ring, and the plurality of balls are movably arranged on the inner wall of the ring groove.

[0017] In some embodiments, the linkage unit includes a motor arranged inside the tank body, an installation cavity is opened inside the tank body, and the motor is arranged on the inner wall of the installation cavity, a threaded rod is arranged at the output end of the motor, and a threaded sleeve is threadedly connected to the outer surface of the threaded rod, the top end of the threaded sleeve passes through the inner wall of the installation cavity and is arranged in the filter cavity, and the threaded sleeve is slid up and down on the inner wall of the filter cavity.

[0018] In some embodiments, a driving plate is rotatably arranged on the end surface of the threaded sleeve rod inside the filter chamber, and both sides of the driving plate are arranged on the side of the connecting plate;

[0019] The threaded sleeve rod is provided to drive the driving plate to move, so that the cleaning rings on both sides of the driving plate can be driven to move synchronously.

[0020] In some embodiments, a recoil assembly is provided on the outside of the outer side of the threaded sleeve, which is used to push out the water inside the filter cartridge to clean the filter holes. The recoil assembly includes an L-shaped plate movably mounted on the outer surface of the threaded sleeve, and a piston disk is provided on the top of the L-shaped plate. The piston disk is movably disposed inside the filter cartridge, and a disc brush is provided on the top of the piston disk, and the disc brush fits tightly against the inner wall of the filter cartridge.

[0021] In some embodiments, an arc-shaped filter plate is provided between the connecting plate and the rotating ring, and the arc-shaped filter plate has a certain degree of adhesion.

[0022] The present invention has at least the following beneficial effects:

[0023] 1. Two cleaning rings are set on the outer surface of the filter cartridge, and the water flow is used to drive the cleaning rings to rotate and drive the brush bundle to move, so as to achieve efficient cleaning of the outer surface of the filter cartridge. The two cleaning rings are designed to rotate in opposite directions to increase the cleaning coverage area, thereby significantly improving the cleaning efficiency;

[0024] 2. The bidirectional driving unit uses water flow power to drive the brush bundle to rotate. Since the brush bundle is tightly attached to the outer surface of the filter cartridge, it can penetrate into the holes of the filter cartridge. Through the rotation of the brush bundle itself, the filamentary objects entangled in the holes are effectively rolled out, thereby achieving a better cleaning effect.

[0025] 3. The configured linkage unit can not only drive the cleaning ring to move, but also clean the inner wall of the filter cartridge. The component can also push the water flow inside the filter cartridge to pass through its holes, thereby enhancing the overall cleaning effect. BRIEF DESCRIPTION OF THE DRAWINGS

[0026] Figure 1 It is a schematic diagram of the overall structure of the present invention;

[0027] Figure 2 It is a schematic diagram of the cross-sectional structure of the side of the present invention;

[0028] Figure 3 It is a schematic diagram of the structure of the linkage unit, the filter cartridge and the cleaning ring of the present invention;

[0029] Figure 4 It is a schematic structural diagram of the linkage unit and the support member of the present invention;

[0030] Figure 5 It is a schematic diagram of the exploded structure of the support member and the linkage unit of the present invention;

[0031] Figure 6 This is a schematic diagram of the structure of the cleaning ring, brush bundle and bidirectional drive unit of the present invention;

[0032] Figure 7It is a schematic diagram of the explosion structure of the rotating ring, the cleaning ring and the connecting plate of the present invention;

[0033] Figure 8 It is a schematic diagram of the cross-sectional structure of the cleaning ring of the present invention;

[0034] Fig. 9 for Figure 8 A schematic diagram of the enlarged structure at A;

[0035] Fig.10 It is a schematic diagram of the exploded structure of the tension spring, blade, spline rod and spline sleeve of the present invention;

[0036] Fig.11 It is a schematic diagram of the structure of the connecting plate, rotating ring and arc filter plate of the present invention.

[0037] In the figure: 1. tank body; 2. base; 3. filter chamber; 4. filter cartridge; 5. installation chamber; 6. cleaning ring; 7. bidirectional drive unit; 71. motor; 72. drive plate; 73. threaded rod; 74. threaded sleeve rod; 8. linkage unit; 81. arc groove; 82. circular groove; 83. flushing chamber; 84. connecting chamber; 85. tension spring; 86. drive rod; 87. blade; 88. spline rod; 89. spline sleeve; 810. connecting rod; 9. support member; 91. rotating ring; 92. connecting plate; 93. ball; 94. ring groove; 10. brush bundle; 11. arc filter plate; 12. recoil assembly; 121. L-shaped plate; 122. piston disc; 123. disc brush. DETAILED DESCRIPTION

[0038] The following will be combined with the drawings in the embodiments of the present invention to clearly and completely describe the technical solutions in the embodiments of the present invention. Obviously, the described embodiments are only part of the embodiments of the present invention, not all of the embodiments. Based on the embodiments of the present invention, all other embodiments obtained by ordinary technicians in this field without creative work are within the scope of protection of the present invention.

[0039] Example 1: Please refer to Figure 1-10 The present invention provides a technical solution: a construction wastewater treatment device, comprising a tank body 1, a base 2, a filter chamber 3 and a filter cartridge 4 arranged in the filter chamber 3, and also comprising:

[0040] A cleaning ring 6 is movably sleeved on the outside of the filter cartridge 4;

[0041] The brush bundle 10 is arranged inside the cleaning ring 6, and a plurality of brush bundles 10 are evenly arranged and face the filter holes on the filter cartridge 4;

[0042] The bidirectional driving unit 7 is arranged inside the tank body 1 and connected to the cleaning ring 6, and is used to drive the cleaning ring 6 to rise and fall outside the filter cylinder 4;

[0043] The linkage unit 8 is arranged in the tank body 1 and connected to the brush bundle 10, and the end of the brush bundle 10 extends into the filter hole of the filter cartridge 4. When the cleaning ring 6 is raised or lowered, the linkage unit 8 is used to drive the brush bundle 10 and the cleaning ring 6 to rotate at the same time.

[0044] The bidirectional driving unit 7 includes a connecting rod 810 arranged on the end face of the brush bundle 10. The end face of the connecting rod 810 away from the brush bundle 10 passes through the cleaning ring 6, and a connecting cavity 84 is opened inside the cleaning ring 6. The connecting rod 810 is arranged in the connecting cavity 84. The end face of the connecting rod 810 inside the connecting cavity 84 is provided with a spline sleeve 89. The brush bundle 10 is arranged together by the connecting rod 810, and the connecting rod 810 can move inside the connecting cavity 84.

[0045] The outer surface of the spline sleeve 89 is sleeved with a tension spring 85, one end of the tension spring 85 is arranged on the inner wall of the connecting cavity 84, a spline rod 88 is arranged inside the spline sleeve 89, a flushing cavity 83 is opened inside the cleaning ring 6, and the end face of the spline rod 88 passes through the inner wall of the connecting cavity 84 and is arranged in the flushing cavity 83, the spline rod 88 is rotatably arranged in the connecting cavity 84, for this purpose, the spline sleeve 89 is movably sleeved on the spline rod 88, and the spline rod 88 is rotationally limited in the connecting cavity 84, the brush bundle 10 is squeezed into the hole by the tension spring 85, and the filamentary object can be rolled out by its own rotation.

[0046] A driving rod 86 is provided at the end surface of the spline rod 88 in the flushing chamber 83, and a plurality of blades 87 are provided on the outer surface of the driving rod 86. A plurality of circular grooves 82 are provided at the upper and lower ends of the cleaning ring 6, and the plurality of circular grooves 82 are interconnected through the flushing chamber 83. When water flows into the flushing chamber 83, the blades 87 can be driven to rotate, thereby driving the driving rod 86 to rotate, and finally driving the brush bundle 10 to rotate.

[0047] When the water flows into the flushing cavity 83 through the circular groove 82 on the end surface of the cleaning ring 6, the water flows through the circular groove 82 opened at the other end of the cleaning ring 6, and the water flow at this time can drive the blades 87 to rotate.

[0048] The outer surface of the cleaning ring 6 is provided with a plurality of arc grooves 81, and the end surface of the cleaning ring 6 is provided with a trapezoidal ring arrangement, and the end surface of the cleaning ring 6 is provided with a support member 9 for connecting two cleaning rings 6 to each other;

[0049] The arc groove 81 between the upper and lower cleaning rings 6 is not the same, so when water flows through, the two cleaning rings 6 can rotate in different directions, which can increase the cleaning area. Since the two cleaning rings 6 rotate in different directions, their movement trajectories are different, so when cleaning the filter cartridge 4, they do not have a single trajectory, thereby reducing the generation of cleaning blind spots.

[0050] The support member 9 includes a rotating ring 91 movably arranged on the end face of the cleaning ring 6, and an annular groove 94 is provided on the end face of the cleaning ring 6 close to the rotating ring 91. The rotating ring 91 is movably arranged in the annular groove 94, and a connecting plate 92 is provided on the end face of the annular groove 94. A plurality of balls 93 are movably embedded in the end face of the rotating ring 91, and a plurality of balls 93 are movably arranged on the inner wall of the annular groove 94. The rotating ring 91 can only rotate in the annular groove 94 and cannot detach by itself. The connecting plate 92 can connect the rotating ring 91 at the upper and lower ends, and the balls 93 can reduce the friction force of the rotation on the inner wall of the annular groove 94.

[0051] The linkage unit 8 includes a motor 71 arranged inside the tank body 1, an installation cavity 5 is opened inside the tank body 1, and the motor 71 is arranged on the inner wall of the installation cavity 5, a threaded rod 73 is arranged at the output end of the motor 71, and a threaded sleeve rod 74 is threadedly connected to the outer surface of the threaded rod 73, and the top end of the threaded sleeve rod 74 passes through the inner wall of the installation cavity 5 and is arranged in the filter cavity 3, and the threaded sleeve rod 74 is slid up and down on the inner wall of the filter cavity 3, so that the threaded rod 73 is driven by the motor 71, and the threaded sleeve rod 74 can be driven to rise and fall.

[0052] The threaded sleeve 74 is rotatably provided with a driving plate 72 on the end surface inside the filter chamber 3, and both sides of the driving plate 72 are provided on the side of the connecting plate 92;

[0053] The threaded sleeve 74 drives the driving plate 72 to move, and can drive the cleaning rings 6 on both sides of the driving plate 72 to move synchronously. Through the setting of the driving plate 72, the four cleaning rings can be driven to move synchronously, thereby reducing the occurrence of jamming.

[0054] A recoil assembly 12 is provided on the outside of the outer side of the threaded sleeve 74 for pushing out the water inside the filter cartridge 4 and cleaning the filter holes. The recoil assembly 12 includes an L-shaped plate 121 movably sleeved on the outer surface of the threaded sleeve 74. A piston disc 122 is provided on the top of the L-shaped plate 121. The piston disc 122 is movably arranged inside the filter cartridge 4. A disc brush 123 is provided on the top of the piston disc 122. The disc brush 123 fits tightly against the inner wall of the filter cartridge 4. By utilizing the small hole characteristics, when the disc brush 123 cleans the inner wall of the filter cartridge 4, the dirt can be discharged through the hole by the piston disc 122, and it also has the effect of flushing the outer surface of the filter cartridge 4.

[0055] When using the device, first fill the filter chamber 3 with water, then start the motor 71 to mobilize the threaded rod 73 to rotate, the threaded rod 73 drives the threaded sleeve rod 74 to move, the threaded sleeve rod 74 drives the threaded sleeve rod 74 to move, the threaded sleeve rod 74 drives the top drive plate 72 to move, the drive plate 72 drives the connecting plate 92 to move, the connecting plate 92 drives the rotating ring 91 to move, the rotating ring 91 drives the cleaning ring 6 to move, the cleaning ring 6 rises, and the water flow at this time passes through the cylindrical arc groove 81, thereby driving the cleaning ring 6 rotates, thereby driving the brush bundle 10 to rotate, and the water flow will also enter the circular groove 82, enter the flushing chamber 83 through the circular groove 82, and then come out from the circular groove 82 on the other side, then it can drive the internal blade 87 to rotate, the blade 87 drives the driving rod 86 to rotate, the driving rod 86 drives the spline rod 88 on the end face to rotate, the spline rod 88 drives the spline sleeve 89 to move, so that the spline sleeve 89 drives the connecting rod 810 and the brush bundle 10 to rotate, and the brush bundle 10 can remove the filamentous objects in the holes of the filter cartridge 4;

[0056] The synchronous L-shaped plate 121 will drive the piston disc 122 to move inside the filter cartridge 4, and the piston disc 122 will drive the disc brush 123 to move, so that the disc brush 123 will clean the stains inside the filter cartridge 4. At the same time, the piston disc 122 will flush the water inside the filter cartridge 4 out through the holes, which can not only clean the holes but also clean the outer surface of the filter cartridge 4.

[0057] Example 2: Please refer to Fig.11 The present invention provides a technical solution: an arc-shaped filter plate 11 is arranged between the connecting plate 92 and the rotating ring 91. The arc-shaped filter plate 11 has a certain adhesion and is detachable to prevent stains from falling off.

[0058] It should be noted that, in this article, relational terms such as first and second, etc. are only used to distinguish one entity or operation from another entity or operation, and do not necessarily require or imply any such actual relationship or order between these entities or operations. Moreover, the terms "include", "comprise" or any other variants thereof are intended to cover non-exclusive inclusion, so that a process, method, article or device including a series of elements includes not only those elements, but also other elements not explicitly listed, or also includes elements inherent to such process, method, article or device.

[0059] While the embodiments of the present invention have been shown and described, it will be appreciated by those skilled in the art that many changes, modifications, substitutions and variations can be made to the embodiments without departing from the principles and spirit of the invention.

Claims

1. A construction wastewater treatment device, comprising a tank body (1), a base (2), a filter chamber (3) and a filter cartridge (4) arranged in the filter chamber (3), characterized in that: Also included are: A cleaning ring (6) movably sleeved on the outer side of the filter cartridge (4); A brush bundle (10) is arranged inside the cleaning ring (6), and a plurality of brush bundles are evenly arranged and face the filter holes on the filter cartridge (4); A bidirectional driving unit (8) is arranged inside the tank body (1) and connected to the cleaning ring (6), and is used to drive the cleaning ring (6) to rise and fall outside the filter cartridge (4); A linkage unit (7) is arranged in the tank body (1) and connected to the brush bundle (10), and the end of the brush bundle (10) extends into the filter hole of the filter cartridge (4). When the cleaning ring (6) is raised or lowered, the linkage unit (7) is used to simultaneously drive the brush bundle (10) and the cleaning ring (6) to rotate.

2. The construction wastewater treatment device according to claim 1, characterized in that: The bidirectional drive unit (8) comprises a connecting rod (810) arranged on the end face of the brush bundle (10); the end face of the connecting rod (810) away from the brush bundle (10) passes through the cleaning ring (6); a connecting cavity (84) is provided inside the cleaning ring (6); the connecting rod (810) is arranged in the connecting cavity (84); and a spline sleeve (89) is provided on the end face of the connecting rod (810) inside the connecting cavity (84).

3. The construction wastewater treatment device according to claim 2, characterized in that: The outer surface of the spline sleeve (89) is sleeved with a tension spring (85), one end of which is arranged on the inner wall of the connecting cavity (84), and a spline rod (88) is arranged inside the spline sleeve (89). A flushing cavity (83) is opened inside the cleaning ring (6), and the end face of the spline rod (88) passes through the inner wall of the connecting cavity (84) and is arranged in the flushing cavity (83). The spline rod (88) is rotatably arranged in the connecting cavity (84), and for this purpose, the spline sleeve (89) is movably sleeved on the spline rod (88).

4. The construction wastewater treatment device according to claim 3 is characterized in that: The spline rod (88) is provided with a driving rod (86) at the end surface in the flushing cavity (83), and a plurality of blades (87) are provided on the outer surface of the driving rod (86). The cleaning ring (6) is provided with a plurality of circular grooves (82) at the upper and lower ends, and the plurality of circular grooves (82) are interconnected through the flushing cavity (83); When the water flows through the circular groove (82) on the end surface of the cleaning ring (6) and enters the flushing chamber (83), the water flows through the circular groove (82) opened at the other end of the cleaning ring (6), and the water flow can drive the blades (87) to rotate.

5. The construction wastewater treatment device according to claim 4, characterized in that: The outer surface of the cleaning ring (6) is provided with a plurality of arc grooves (81), and the end surface of the cleaning ring (6) is provided with a trapezoidal ring, and the end surface of the cleaning ring (6) is provided with a support member (9) for connecting two cleaning rings (6) to each other; The arc grooves (81) between the upper and lower cleaning rings (6) are different, so that when water flows through, the two cleaning rings (6) can rotate in different directions, thereby increasing the cleaning area.

6. The construction wastewater treatment device according to claim 5, characterized in that: The support member (9) comprises a rotating ring (91) movably arranged on the end face of a cleaning ring (6); an annular groove (94) is provided on the end face of the cleaning ring (6) close to the rotating ring (91); the rotating ring (91) is movably arranged in the annular groove (94); and a connecting plate (92) is provided on the end face of the annular groove (94); a plurality of balls (93) are movably embedded on the end face of the rotating ring (91); and the plurality of balls (93) are movably arranged on the inner wall of the annular groove (94).

7. The construction wastewater treatment device according to claim 1, characterized in that: The linkage unit (7) comprises a motor (71) arranged inside the tank body (1); a mounting cavity (5) is provided inside the tank body (1), and the motor (71) is arranged on the inner wall of the mounting cavity (5); a threaded rod (73) is arranged at the output end of the motor (71); a threaded sleeve rod (74) is threadedly connected to the outer surface of the threaded rod (73); the top end of the threaded sleeve rod (74) passes through the inner wall of the mounting cavity (5) and is arranged in the filter cavity (3); and the threaded sleeve rod (74) is slidably arranged on the inner wall of the filter cavity (3) up and down.

8. The construction wastewater treatment device according to claim 7, characterized in that: The threaded sleeve rod (74) is rotatably provided with a driving plate (72) on the end surface inside the filter chamber (3), and both sides of the driving plate (72) are arranged on the side of the connecting plate (92); The threaded sleeve rod (74) is provided to drive the driving plate (72) to move, thereby driving the cleaning rings (6) on both sides of the driving plate (72) to move synchronously.

9. The construction wastewater treatment device according to claim 8, characterized in that: A backflush assembly (12) is arranged on the outer side of the outer side of the threaded sleeve (74) for pushing out water inside the filter cartridge (4) to clean the filter holes. The backflush assembly (12) comprises an L-shaped plate (121) movably sleeved on the outer surface of the threaded sleeve (74). A piston disc (122) is arranged on the top of the L-shaped plate (121). The piston disc (122) is movably arranged inside the filter cartridge (4). A disc brush (123) is arranged on the top of the piston disc (122). The disc brush (123) is tightly fitted to the inner wall of the filter cartridge (4).

10. The construction wastewater treatment device according to claim 6, characterized in that: An arc-shaped filter plate (11) is arranged between the connecting plate (92) and the rotating ring (91), and the arc-shaped filter plate (11) has a certain degree of adhesion.