Modularized sewage treatment device

By introducing cleaning pipes, nozzles, shifting mechanisms, and impurity removal mechanisms into the modular wastewater treatment unit, the problems of filter cleaning and impurity removal are solved, improving the filter cleaning efficiency and the mixing effect of wastewater disinfectant.

CN224212468UActive Publication Date: 2026-05-08CHENGDU YUANLIN ENVIRONMENTAL PROTECTION TECH CO LTD
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Patent Information

Authority / Receiving Office
CN · China
Patent Type
Utility models(China)
Current Assignee / Owner
CHENGDU YUANLIN ENVIRONMENTAL PROTECTION TECH CO LTD
Filing Date
2025-05-06
Publication Date
2026-05-08

AI Technical Summary

Technical Problem

Existing modular wastewater treatment devices cannot effectively clean the second and third filters, and it is inconvenient to remove impurities. At the same time, the mixing efficiency of wastewater and disinfectant is low.

Method used

The design incorporates a cleaning pipe, nozzle, shifting mechanism, and waste removal mechanism to achieve water spray cleaning of the first, second, and third filters, and a stirring mechanism to ensure thorough mixing of water and disinfectant.

Benefits of technology

It achieves efficient cleaning and impurity removal of multiple filters, improves wastewater treatment efficiency, and enhances the mixing efficiency of wastewater and disinfectant, avoiding uneven mixing and waste of reagents.

✦ Generated by Eureka AI based on patent content.

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Abstract

The utility model provides a modularized sewage treatment device, which belongs to the technical field of sewage treatment and comprises a filter tank, a water inlet pipe is fixedly connected to the left side wall of the filter tank, and three partition plates are uniformly and fixedly connected to the inner bottom wall of the filter tank. A first filter screen, a second filter screen and a third filter screen corresponding to the partition plates are arranged in the filter box, and cleaning pipes are arranged on the right sides of the first filter screen, the second filter screen and the third filter screen. Through the arrangement of the cleaning pipe, the spray head, the branch pipe, the shifting mechanism and the impurity discharging mechanism, the first filter screen, the second filter screen and the third filter screen can be cleaned by spraying water at the same time, the subsequent sewage treatment effect is guaranteed, meanwhile, the first filter screen, the second filter screen and the third filter screen can be conveniently replaced, and the cleaning efficiency is improved. And the cleaned impurities can be discharged outwards, and the problems that in the prior art, a second filter screen and a third filter screen are inconvenient to clean, and the cleaned impurities are inconvenient to discharge are solved.
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Description

Technical Field

[0001] This utility model relates to the field of wastewater treatment technology, and more specifically, to a modular wastewater treatment device. Background Technology

[0002] With the improvement of modern people's living standards, the utilization of urban water resources has been maximized, and the treatment of sewage formed after water discharge has become a necessary process in urban construction. Water treatment methods include physical treatment and chemical treatment. Humans have been using water treatment methods for a long time. Physical methods include utilizing various pore sizes...

[0003] A search revealed that patent application CN202122284114.1 discloses a modular sewage treatment device, including a filtration chamber, an inlet, a disinfection chamber, and a storage chamber. An electric valve is fixedly installed on one side of the filtration chamber's exterior, and a first filter screen, a second filter screen, and a third filter screen are fixedly connected to one side of the filtration chamber's interior. This invention effectively purifies sewage by incorporating first, second, and third filter screens within the filtration chamber, and activated carbon within the second filter screen and the first motor. The first filter screen effectively isolates large particles of debris from the sewage. The first motor, activated on one side of the filtration chamber, rotates a spiral shaft, causing a movable block on the spiral shaft to scrape debris from the first filter screen using a cleaning plate. The electric valve opens, allowing the debris to be discharged. However, the following drawbacks remain:

[0004] (1) The modular sewage treatment device in the prior art can only clean the first filter screen, and it is inconvenient to clean the second and third filters screens, resulting in poor subsequent use effect. At the same time, it is inconvenient to discharge the cleaned impurities to the outside in the prior art.

[0005] (2) The existing modular sewage treatment devices have poor mixing effect on sewage and disinfectant by using a single stirring rod, resulting in low mixing efficiency.

[0006] Therefore, we have made improvements to this and proposed a modular wastewater treatment device. Utility Model Content

[0007] The purpose of this invention is to address the current problems of inconvenience in cleaning the second and third filters, inconvenience in discharging the cleaned impurities, and low efficiency in mixing wastewater with disinfectants.

[0008] To achieve the above-mentioned objectives, this utility model provides the following technical solution:

[0009] Modular wastewater treatment devices are used to improve the above-mentioned problems.

[0010] The present invention is as follows:

[0011] The filter includes a filter box, with an inlet pipe fixedly connected to the left side wall. Three partitions are evenly fixedly connected to the inner bottom wall of the filter box. The filter box contains a first filter screen, a second filter screen, and a third filter screen, each corresponding to one of the partitions. A cleaning pipe is provided on the right side of each of the first, second, and third filter screens. A set of nozzles is evenly fixedly connected to each cleaning pipe. The end of the cleaning pipe passes through the filter box and is fixedly connected to a branch pipe. A displacement mechanism for moving the cleaning pipe is provided on the upper surface of the filter box. A waste removal mechanism is provided at the bottom of the filter box. The filter box is connected to a disinfection box via a connecting pipe. A dosing pipe is fixedly connected to the upper surface of the disinfection box. A stirring mechanism is provided inside the disinfection box. A water storage tank is located on the right side of the disinfection box, and a water conveying mechanism is provided on the upper surface of the water storage tank.

[0012] As a preferred technical solution of this utility model, the displacement mechanism includes a bracket fixed to the upper end face of the filter box, a threaded rod rotatably connected inside the bracket, a first motor fixedly connected to the front side wall of the bracket, the drive end of the first motor fixedly connected to the shaft end of the threaded rod, a displacement block threadedly connected to the threaded rod, a connecting rod fixedly connected to the upper end face of the displacement block, a fixing sleeve fixedly connected to the bottom outer end of the connecting rod, and the fixing sleeve fixedly connected to the branch pipe.

[0013] As a preferred technical solution of this utility model, the impurity removal mechanism includes guide frames fixed to the left side of the partition, each guide frame having a rotating shaft inside. The rear end of the rotating shaft is rotatably connected to the filter box, and a spiral blade is fixedly connected to the rotating shaft. Three impurity removal pipes communicating with the filter box are evenly fixedly connected to the front end of the filter box, and a control valve is fixedly connected to the outer end of each impurity removal pipe. The rear end of the rotating shaft passes through the filter box and is fixedly connected to a first bevel gear. Two fixing plates are fixedly connected to the rear side wall of the filter box, and a rotating rod is rotatably connected between the two fixing plates. Three second bevel gears, each meshing with the first bevel gear, are fixedly connected to the rotating rod. A second motor is fixedly connected to one of the fixing plates, and the drive end of the second motor is fixedly connected to the shaft end of the rotating rod.

[0014] As a preferred technical solution of this utility model, the stirring mechanism includes two stirring shafts symmetrically and rotatably arranged on the disinfection box. A set of stirring paddles is uniformly fixedly connected to each of the two stirring shafts. A driven bevel gear is fixedly connected to the top of each of the two stirring shafts. Two upright plates are symmetrically and fixedly connected to the upper end of the disinfection box. A transmission shaft is rotatably connected between the two upright plates. Two driving bevel gears, which are respectively meshed with the driven bevel gears, are symmetrically and fixedly connected to the transmission shaft. A third motor is fixedly connected to one of the upright plates. The drive end of the third motor is fixedly connected to the shaft end of the transmission shaft.

[0015] As a preferred technical solution of this utility model, the water conveying mechanism includes a water pump fixed on the upper surface of the water storage tank. The input end of the water pump is fixedly connected to a first water conveying pipe. The outer end of the first water conveying pipe passes through the disinfection tank and extends into its interior. The output end of the water pump is fixedly connected to a second water conveying pipe. The outer end of the second water conveying pipe passes through the water storage tank and extends into its interior.

[0016] As a preferred technical solution of this utility model, a drain pipe is fixedly connected to the bottom of the outer side wall of the water storage tank and communicates with it, and an electromagnetic valve is installed at the outer end of the drain pipe.

[0017] Compared with the prior art, the beneficial effects of this utility model are as follows:

[0018] In the solution of this utility model:

[0019] 1. By setting up cleaning pipes, nozzles, branch pipes, shifting mechanisms, and impurity removal mechanisms, the first, second, and third filter screens can be cleaned simultaneously by spraying water, ensuring the subsequent sewage treatment effect. At the same time, it is convenient to replace the first, second, and third filter screens, and it can also discharge the cleaned impurities. This solves the problems of inconvenience in cleaning the second and third filter screens and inconvenience in discharging the cleaned impurities in the existing technology.

[0020] 2. The set stirring mechanism enables two stirring shafts to rotate in opposite directions simultaneously, so that water and disinfectant are fully mixed, improving the mixing efficiency and avoiding the problems of incomplete disinfection or waste of disinfectant caused by uneven mixing. This solves the problem of low mixing efficiency of water and disinfectant in the existing technology. Attached Figure Description

[0021] Figure 1 A schematic diagram of the overall structure of this utility model;

[0022] Figure 2 A schematic diagram of the rear structure provided by this utility model;

[0023] Figure 3 A schematic diagram of the displacement mechanism provided by this utility model;

[0024] Figure 4 A partial structural schematic diagram of the impurity removal mechanism provided by this utility model;

[0025] Figure 5 A schematic diagram of the internal structure of the disinfection box provided by this utility model;

[0026] Figure 6 A schematic diagram of the stirring mechanism provided by this utility model.

[0027] The image shows:

[0028] 1. Filter box; 2. Inlet pipe; 3. Baffle; 4. First filter screen; 5. Second filter screen; 6. Third filter screen; 7. Cleaning pipe; 8. Nozzle; 9. Branch pipe; 10. Shifting mechanism; 1001. Bracket; 1002. Threaded rod; 1003. First motor; 1004. Shifting block; 1005. Connecting rod; 1006. Fixing sleeve; 11. Impurity discharge mechanism; 1101. Guide frame; 1102. Rotating shaft; 1103. Spiral blade; 1104. Impurity discharge pipe; 1105. Control valve; 1106. First bevel gear; 110 7. Fixing plate; 1108. Rotating rod; 1109. Second bevel gear; 1110. Second motor; 12. Connecting pipe; 13. Disinfection box; 14. Dosing pipe; 15. Stirring mechanism; 1501. Stirring shaft; 1502. Stirring paddle; 1503. Driven bevel gear; 1504. Vertical plate; 1505. Transmission shaft; 1506. Driving bevel gear; 1507. Third motor; 16. Water storage tank; 17. Water conveying mechanism; 1701. Water pump; 1702. First water conveying pipe; 1703. Second water conveying pipe; 18. Drainage pipe. Detailed Implementation

[0029] To make the objectives, technical solutions, and advantages of the embodiments of this utility model clearer, the technical solutions of the embodiments of this utility model will be clearly and completely described below with reference to the accompanying drawings. Obviously, the described embodiments are only some, not all, of the embodiments of this utility model.

[0030] like Figure 1 , Figure 2 , Figure 3 , Figure 4 , Figure 5 and Figure 6As shown, this embodiment proposes a modular sewage treatment device, including a filter box 1. An inlet pipe 2 is fixedly connected to the left side wall of the filter box 1. Three partitions 3 are evenly fixedly connected to the inner bottom wall of the filter box 1. A first filter screen 4, a second filter screen 5, and a third filter screen 6, corresponding to the partitions 3, are respectively provided inside the filter box 1. A cleaning pipe 7 is provided on the right side of each of the first filter screen 4, second filter screen 5, and third filter screen 6. A set of nozzles 8 are evenly fixedly connected to the cleaning pipe 7. The end of the cleaning pipe 7 passes through the filter box 1 and is fixedly connected to a branch pipe 9. A displacement mechanism 10 for moving the cleaning pipe 7 is provided on the upper surface of the filter box 1. A waste removal mechanism 11 is provided at the bottom of the filter box 1. The filter box 1 is connected to a disinfection box 13 via a connecting pipe 12. A dosing pipe 14 is fixedly connected to the upper end of the disinfection tank 13. A stirring mechanism 15 is provided inside the disinfection tank 13. A water storage tank 16 is provided on the right side of the disinfection tank 13. A water conveying mechanism 17 is provided on the upper end of the water storage tank 16. Wastewater enters the filter tank 1 through the inlet pipe 2. After passing through the first filter screen 4, the second filter screen 5 and the third filter screen 6, impurities and suspended solids are removed. The filtered water enters the disinfection tank 13 through the connecting pipe 12. Disinfectant is added to the disinfection tank 13 through the dosing pipe 14 and is fully mixed and disinfected by the stirring mechanism 15. Finally, it is transported to the water storage tank 16 by the water conveying mechanism 17 for storage and standby. The first filter screen 4, the second filter screen 5 and the third filter screen 6 can be cleaned simultaneously through the cleaning pipe 7 and the nozzle 8 to ensure the subsequent use effect.

[0031] like Figure 1 and Figure 3 As shown, in a preferred embodiment, based on the above method, the shifting mechanism 10 further includes a bracket 1001 fixed to the upper end face of the filter box 1. A threaded rod 1002 is rotatably connected inside the bracket 1001. A first motor 1003 is fixedly connected to the front side wall of the bracket 1001. The drive end of the first motor 1003 is fixedly connected to the shaft end of the threaded rod 1002. A shifting block 1004 is threadedly connected to the threaded rod 1002. A connecting rod 1005 is fixedly connected to the upper end face of the shifting block 1004. A fixing sleeve 1006 is fixedly connected to the bottom of the outer end of the rod 1005. The fixing sleeve 1006 is fixedly connected to the branch pipe 9. The first motor 1003 drives the threaded rod 1002 to rotate, which drives the displacement block 1004 to move along the threaded rod 1002. Then, through the connecting rod 1005 and the fixing sleeve 1006, the branch pipe 9 and the cleaning pipe 7 are moved, so that the cleaning pipe 7 can cover the entire filtration area. The nozzle 8 thoroughly cleans the first filter screen 4, the second filter screen 5 and the third filter screen 6, effectively preventing the filter screen from clogging and ensuring the filtration effect.

[0032] like Figure 1 , Figure 2 , Figure 4 and Figure 5As shown, in a preferred embodiment, based on the above method, the impurity removal mechanism 11 further includes guide frames 1101 fixed to the left side of the partition 3, each guide frame 1101 having a rotating shaft 1102. The rear end of the rotating shaft 1102 is rotatably connected to the filter box 1. A spiral blade 1103 is fixedly connected to the rotating shaft 1102. Three impurity removal pipes 1104 communicating with the filter box 1 are evenly fixedly connected to the front end of the filter box 1. A control valve 1105 is fixedly connected to the outer end of the impurity removal pipe 1104. The rear end of the rotating shaft 1102 passes through the filter box 1 and is fixedly connected to a first bevel gear 1106. Two fixing plates 1107 are fixedly connected to the rear side wall of the filter box 1. A rotating rod 1108 is rotatably connected between the two fixing plates 1107. Three second bevel gears 1109 are fixedly connected and mesh with the first bevel gear 1106 respectively. A second motor 1110 is fixedly connected to one of the fixed plates 1107. The drive end of the second motor 1110 is fixedly connected to the shaft end of the rotating rod 1108. The second motor 1110 drives the rotating rod 1108 to rotate. The rotation of the rotating rod 1108 drives the second bevel gears 1109 to rotate. The rotation of the second bevel gears 1109 drives the first bevel gear 1106 to rotate. The rotation of the first bevel gear 1106 drives the rotating shaft 1102 and the spiral blade 1103 to rotate, pushing the impurities in the guide frame 1101 to the discharge pipe 1104 for discharge. The control valve 1105 can control the opening and closing of the discharge pipe, which improves the automation level and operating efficiency of the device.

[0033] like Figure 1 and Figure 6 As shown, in a preferred embodiment, based on the above method, the stirring mechanism 15 further includes two stirring shafts 1501 symmetrically and rotatably arranged on the disinfection box 13. A set of stirring paddles 1502 are uniformly fixedly connected to each of the two stirring shafts 1501. A driven bevel gear 1503 is fixedly connected to the top of each of the two stirring shafts 1501. Two vertical plates 1504 are symmetrically and fixedly connected to the upper surface of the disinfection box 13. A drive shaft 1505 is rotatably connected between the two vertical plates 1504. Two branch gears are symmetrically and fixedly connected to the drive shaft 1505. The driving bevel gear 1506, which is connected to the driven bevel gear 1503, has a third motor 1507 fixedly connected to one of the vertical plates 1504. The driving end of the third motor 1507 is fixedly connected to the shaft end of the transmission shaft 1505. The third motor 1507 drives the transmission shaft 1505 to rotate. Through the meshing transmission of the driving bevel gear 1506 and the driven bevel gear 1503, it drives the two stirring shafts 1501 and the stirring paddle 1502 to rotate. At the same time, the two stirring shafts 1501 rotate in opposite directions, which improves the mixing efficiency of water and disinfectant in the disinfection tank 13.

[0034] like Figure 1 and Figure 2As shown, in a preferred embodiment, based on the above method, the water conveying mechanism 17 further includes a water pump 1701 fixed to the upper surface of the water storage tank 16. The input end of the water pump 1701 is fixedly connected to a first water conveying pipe 1702. The outer end of the first water conveying pipe 1702 passes through the disinfection tank 13 and extends into its interior. The output end of the water pump 1701 is fixedly connected to a second water conveying pipe 1703. The outer end of the second water conveying pipe 1703 passes through the water storage tank 16 and extends into its interior. The water pump 1701 draws decontaminated water from the disinfection tank 13 through the first water conveying pipe 1702, and then delivers it to the water storage tank 16 for storage through the second water conveying pipe 1703, thus realizing automatic water delivery.

[0035] like Figure 1 and Figure 2 As shown, in a preferred embodiment, based on the above method, a drain pipe 18 is fixedly connected to the bottom of the outer side wall of the water storage tank 16 and communicates with it. A solenoid valve is installed at the outer end of the drain pipe 18 to control the discharge of water in the water storage tank 16. When the treated water is needed, the solenoid valve is opened and the water is discharged through the drain pipe 18. When it is not needed, the solenoid valve is closed to keep the water level in the water storage tank 16 stable.

[0036] Specifically, in use, this modular wastewater treatment device works as follows: wastewater enters the filter tank 1 through the inlet pipe 2, and after passing through multiple stages of filtration including the first filter screen 4, the second filter screen 5, and the third filter screen 6, impurities and suspended solids are removed. The filtered water then enters the disinfection tank 13 through the connecting pipe 12. Disinfectant is added to the disinfection tank 13 through the dosing pipe 14. The third motor 1507 drives the transmission shaft 1505 to rotate, and through the meshing of the driving bevel gear 1506 and the driven bevel gear 1503, it drives the two stirring shafts 1501 and the stirring paddle 1502 to rotate. At the same time, the two stirring shafts 1501 rotate in opposite directions, ensuring thorough mixing of the wastewater and disinfectant. The water pump 1701 draws the disinfected water from the disinfection tank 13 through the first water supply pipe 1702, and then transports it to the storage tank 16 through the second water supply pipe 1703. When it is necessary to clean the filter screens, the inlet of the branch pipe 9 is connected through a flexible hose. The end is connected to the water supply equipment. The first motor 1003 drives the threaded rod 1002 to rotate, which drives the displacement block 1004 to move along the threaded rod 1002. Then, through the connecting rod 1005 and the fixed sleeve 1006, the branch pipe 9 and the cleaning pipe 7 are moved, so that the cleaning pipe 7 can cover the entire filtration area. The nozzle 8 thoroughly cleans the first filter screen 4, the second filter screen 5 and the third filter screen 6. When cleaning the filter screen, the impurities fall into the guide frame 1101. Then, the control valve 1105 is opened, and the second motor 1110 drives the rotating rod 1108 to rotate. The rotation of the rotating rod 1108 drives the second bevel gear 1109 to rotate. The rotation of the second bevel gear 1109 drives the first bevel gear 1106 to rotate. The rotation of the first bevel gear 1106 drives the rotating shaft 1102 and the spiral blade 1103 to rotate, pushing the impurities in the guide frame 1101 to the discharge pipe 1104 for discharge.

[0037] All technical features in this embodiment can be freely combined according to actual needs.

[0038] The above embodiments are preferred implementations of this utility model. In addition, this utility model can also be implemented in other ways. Any obvious substitutions without departing from the concept of this technical solution are within the protection scope of this utility model.

Claims

1. A modular wastewater treatment device, comprising a filter box (1), characterized in that, A water inlet pipe (2) is fixedly connected to the left side wall of the filter box (1). Three partitions (3) are evenly fixedly connected to the inner bottom wall of the filter box (1). The filter box (1) is provided with a first filter screen (4), a second filter screen (5), and a third filter screen (6) corresponding to the partitions (3). A cleaning pipe (7) is provided on the right side of the first filter screen (4), the second filter screen (5), and the third filter screen (6). A set of nozzles (8) are evenly fixedly connected to the cleaning pipe (7). The end of the cleaning pipe (7) passes through the filter box (1) and is fixedly connected to... Branch pipe (9), the upper end face of the filter box (1) is provided with a displacement mechanism (10) for moving the cleaning pipe (7), the bottom of the filter box (1) is provided with a waste discharge mechanism (11), the filter box (1) is connected to a disinfection box (13) through a connecting pipe (12), the upper end face of the disinfection box (13) is fixedly connected with a dosing pipe (14), the disinfection box (13) is provided with a stirring mechanism (15), the right side of the disinfection box (13) is provided with a water storage tank (16), the upper end face of the water storage tank (16) is provided with a water conveying mechanism (17).

2. The modular wastewater treatment device according to claim 1, characterized in that, The shifting mechanism (10) includes a bracket (1001) fixed to the upper end face of the filter box (1). A threaded rod (1002) is rotatably connected inside the bracket (1001). A first motor (1003) is fixedly connected to the front side wall of the bracket (1001). The driving end of the first motor (1003) is fixedly connected to the shaft end of the threaded rod (1002). A shifting block (1004) is threadedly connected to the threaded rod (1002). A connecting rod (1005) is fixedly connected to the upper end face of the shifting block (1004). A fixing sleeve (1006) is fixedly connected to the bottom of the outer end of the connecting rod (1005). The fixing sleeve (1006) is fixedly connected to the branch pipe (9).

3. The modular wastewater treatment device according to claim 1, characterized in that, The impurity removal mechanism (11) includes guide frames (1101) fixed to the left side of the partition (3). Each guide frame (1101) is equipped with a rotating shaft (1102). The rear end of the rotating shaft (1102) is rotatably connected to the filter box (1). A spiral blade (1103) is fixedly connected to the rotating shaft (1102). Three impurity removal pipes (1104) communicating with the filter box (1) are evenly fixedly connected to the front end of the filter box (1). A control valve (1105) is fixedly connected to the outer end of the impurity removal pipe (1104). The rear end of the rotating shaft (1102) passes through the filter box. The filter box (1) is fixedly connected to a first bevel gear (1106). Two fixing plates (1107) are fixedly connected to the rear side wall of the filter box (1). A rotating rod (1108) is rotatably connected between the two fixing plates (1107). Three second bevel gears (1109) that mesh with the first bevel gear (1106) are fixedly connected to the rotating rod (1108). A second motor (1110) is fixedly connected to one of the fixing plates (1107). The driving end of the second motor (1110) is fixedly connected to the shaft end of the rotating rod (1108).

4. A modular wastewater treatment device according to claim 1, characterized in that, The stirring mechanism (15) includes two stirring shafts (1501) symmetrically and rotatably arranged on the disinfection box (13). A set of stirring paddles (1502) are evenly fixedly connected to each of the two stirring shafts (1501). A driven bevel gear (1503) is fixedly connected to the top of each of the two stirring shafts (1501). Two vertical plates (1504) are symmetrically and fixedly connected to the upper end of the disinfection box (13). A transmission shaft (1505) is rotatably connected between the two vertical plates (1504). Two driving bevel gears (1506) are symmetrically and fixedly connected to the transmission shaft (1505) and respectively meshing with the driven bevel gear (1503). A third motor (1507) is fixedly connected to one of the vertical plates (1504). The driving end of the third motor (1507) is fixedly connected to the shaft end of the transmission shaft (1505).

5. A modular wastewater treatment device according to claim 1, characterized in that, The water conveying mechanism (17) includes a water pump (1701) fixed on the upper surface of the water storage tank (16). The input end of the water pump (1701) is fixedly connected to a first water conveying pipe (1702). The outer end of the first water conveying pipe (1702) passes through the disinfection box (13) and extends into its interior. The output end of the water pump (1701) is fixedly connected to a second water conveying pipe (1703). The outer end of the second water conveying pipe (1703) passes through the water storage tank (16) and extends into its interior.

6. A modular wastewater treatment device according to claim 1, characterized in that, The bottom of the outer wall of the water storage tank (16) is fixedly connected to a drain pipe (18) that communicates with it, and an electromagnetic valve is installed at the outer end of the drain pipe (18).

Citation Information

Patent Citations

  • Modularized sewage treatment device

    CN215667511U