Efficient sewage treatment tank

By designing replacement components and utilizing a bevel gear and winding system, the automatic replacement and cleaning of the inlet screen is achieved, solving the problem of reduced treatment efficiency caused by inlet screen clogging and ensuring the continuity and efficiency of wastewater treatment.

CN224180451UActive Publication Date: 2026-05-01SUZHOU JIECHANG ENVIRONMENTAL PROTECTION TECH CO LTD
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Patent Information

Authority / Receiving Office
CN · China
Patent Type
Utility models(China)
Current Assignee / Owner
SUZHOU JIECHANG ENVIRONMENTAL PROTECTION TECH CO LTD
Filing Date
2025-05-26
Publication Date
2026-05-01

AI Technical Summary

Technical Problem

When the inlet screen of an existing high-efficiency wastewater treatment tank becomes clogged, the treatment efficiency is reduced, and traditional cleaning methods affect the continuity of wastewater treatment.

Method used

A replacement component, including a bevel gear and a winding system, is designed for automatically replacing clogged inlet screens, ensuring the continuity of wastewater treatment during cleaning. The bevel gear is driven by a power unit to raise and lower the screen, enabling rapid screen replacement and cleaning.

Benefits of technology

This ensures that wastewater treatment continuity is not affected when the inlet screen becomes clogged, improves wastewater treatment efficiency, and guarantees that the cleaning process is uninterrupted.

✦ Generated by Eureka AI based on patent content.

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Abstract

The utility model discloses an efficient sewage treatment pond, which comprises a sewage treatment pond and a purification system, the purification system comprises a first water inlet screen, first lifting blocks are fixedly mounted at two ends of the top end of the first water inlet screen, and first guide rods are slidably mounted on the inner walls of the first lifting blocks; a first connecting block is fixedly installed on one side of one first lifting block, a first anchor chain is installed at the top end of the first connecting block, the other end of the first anchor chain is wound around the outer wall of a first winder, a first bevel gear is fixedly installed on one side of the first winder, and a second bevel gear is installed on one side of the first bevel gear in a meshed mode; a power chamber is arranged on one side of the second bevel gear, and a replacement assembly is arranged on the other side of the second bevel gear. According to the technical scheme provided by the utility model, the replacement assembly is arranged, so that sewage treatment can still be carried out when a worker cleans the second water inlet screen, and the treatment efficiency of the sewage treatment tank is improved.
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Description

A high-efficiency sewage treatment tank Technical Field

[0001] This utility model relates to the field of sewage treatment ponds, and in particular to a high-efficiency sewage treatment pond. Background Technology

[0002] Wastewater treatment is widely used in various fields such as construction, agriculture, transportation, energy, petrochemicals, environmental protection, urban landscape, medical care, and catering. It is also increasingly entering the daily lives of ordinary people. Wastewater treatment ponds are generally required in the process of wastewater treatment.

[0003] Contact filtration is a common wastewater treatment method used in wastewater treatment ponds. It is a process that uses the adsorption and retention of filter media (such as quartz sand, anthracite, activated carbon, etc.) to remove suspended solids, colloids and some dissolved pollutants from wastewater. Contact filtration has the advantages of a simplified process, easy maintenance, high efficiency in retaining suspended solids and compatibility with various water qualities.

[0004] However, in existing technologies, large debris may clog the inlet screen, resulting in a low sewage flow rate. In this case, staff need to remove the inlet screen for backflushing, which greatly reduces the treatment efficiency of the sewage treatment tank. Furthermore, during use, traditional sewage purification materials rely solely on water flow for rinsing. Once a large amount of sediment accumulates near the inlet screen, it becomes difficult to achieve the purpose of purification. Summary of the Invention

[0005] The main purpose of this invention is to propose a high-efficiency sewage treatment tank, which aims to solve the problem that once the inlet screen of an existing high-efficiency sewage treatment tank becomes clogged, the treatment efficiency of the sewage treatment tank will be seriously affected, whether it is used or cleaned.

[0006] To address the aforementioned problems, this utility model proposes a high-efficiency wastewater treatment tank, comprising a wastewater treatment tank and a purification system;

[0007] The wastewater treatment tank comprises two parts: a wastewater treatment tank and a purification system.

[0008] The sewage treatment tank includes a sewage tank body, and the sewage tank body is provided with an inlet area and a sedimentation area. The inlet area and the sedimentation area are separated by a barrier wall, and support plates are evenly arranged between the barrier wall and the sewage tank body.

[0009] The purification system includes a first inlet screen, which is slidably installed at the top of the sedimentation zone. First lifting blocks are fixedly installed at both ends of the top of the first inlet screen. First guide rods are slidably installed on the inner walls of each lifting block. The first guide rods are fixedly installed at the top of the main body of the sewage tank or a barrier wall. A first connecting block is fixedly installed on one side of one of the first lifting blocks. A first anchor chain is installed at the top of the first connecting block. The other end of the first anchor chain is wound around the outer wall of a first winding device. The first winding device is rotatably installed above the main body of the sewage tank. A first bevel gear and a second bevel gear are fixedly installed on one side of the first winding device. A power chamber is provided on one side of the second bevel gear, and a replacement component is provided on the other side of the second bevel gear, enabling the sewage treatment plant to continue treating sewage even during cleaning.

[0010] Preferably, the replacement component includes a connecting rod and a second inlet screen disposed on one side of the second bevel gear. A first driving block is fixedly installed at one end of the connecting rod, a second driving block is rotatably installed on one side of the first driving block, the second driving block is rotatably installed on the outer wall of the connecting rod, and a third driving block is rotatably installed on the other side of the second driving block, the third driving block being rotatably installed on the outer wall of the connecting rod.

[0011] A first driving rod is fixedly installed on one side of one end of the first driving block, a first abutting block is fixedly installed on one side of the second driving block, a second driving rod is fixedly installed on one side of the first abutting block, and a second abutting block is fixedly installed on one side of the third driving block.

[0012] A connecting cylinder is fixedly installed on one side of the third drive block, and a third bevel gear is fixedly installed on one side of the connecting cylinder. The third bevel gear is rotatably installed on the outer wall of the connecting rod. A fourth bevel gear is meshed on one side of the third bevel gear, and a second winding device is fixedly installed on one side of the fourth bevel gear. A second anchor chain is wound around the outer wall of the second winding device. A second connecting block is fixedly connected to one end of the second anchor chain. A second lifting block is fixedly installed at one end of the second connecting block. The second lifting blocks are symmetrically installed on both sides of the second inlet screen. A second guide rod is slidably installed on the inner wall of each of the second lifting blocks. The second guide rods are all fixedly installed at the top of the main body of the sewage tank or the barrier wall.

[0013] Preferably, a counterweight is provided at the bottom of both the first and second inlet screens.

[0014] Preferably, both sides of the first abutment block are provided with arc-shaped grooves.

[0015] Preferably, a water collection channel is provided between the first inlet screen and the second inlet screen, and the two ends of the water collection channel are fixedly installed on the top of the sewage tank body or the barrier wall. A drainage channel is provided on the side of the second inlet screen away from the water collection channel, and the drainage channel is inclined. The drainage channel is fixedly installed on the top of the support plate.

[0016] Preferably, a feeding device is provided at the top of the drainage ditch near the second inlet screen.

[0017] Preferably, drainage holes are evenly provided on both sides of the drainage ditch.

[0018] Preferably, the distance between the drain hole and the bottom of the drainage channel gradually decreases from the side closer to the second inlet screen to the other side.

[0019] Preferably, an auxiliary channel is fixedly installed at the top of the second inlet screen.

[0020] Preferably, the auxiliary channel is provided with protruding strips on both sides, and the water collection channel and the drainage channel are provided with corresponding grooves on the side of the auxiliary channel.

[0021] Beneficial effects: By setting up a replacement component, the technical solution of this utility model can cause the second inlet screen to rise and leave the main body of the sewage tank when it becomes clogged, making it easier to clean the second inlet screen. At the same time, the first inlet screen falls into the sedimentation zone for sewage treatment. This allows workers to continue sewage treatment while cleaning the second inlet screen, thus improving the treatment efficiency of the sewage treatment tank. Attached Figure Description

[0022] To more clearly illustrate the technical solutions in the embodiments of this utility model or the prior art, the drawings used in the description of the embodiments or the prior art will be briefly introduced below. Obviously, the drawings described below are only some embodiments of this utility model. For those skilled in the art, other drawings can be obtained based on these drawings without creative effort.

[0023] Figure 1 is a schematic diagram of the main structure of the sewage treatment tank of this utility model;

[0024] Figure 2 is an enlarged view of point A in Figure 1 of this utility model;

[0025] Figure 3 is a cross-sectional view of the main structure of the wastewater treatment tank of the utility model from another perspective;

[0026] Figure 4 is an enlarged view of point B in Figure 3 of this utility model;

[0027] Figure 5 is an enlarged view of point C in Figure 4 of this utility model.

[0028] The annotations in the attached figures are explained as follows:

[0029] 1. Wastewater tank main body; 2. Inlet area; 3. Sedimentation area; 4. Barrier wall; 5. Support plate; 6. First inlet screen; 7. First lifting block; 8. First guide rod; 9. First connecting block; 10. First anchor chain; 11. First winding device; 12. First bevel gear; 13. Second bevel gear; 14. Power chamber; 15. Connecting rotating rod; 16. First drive block; 17. Second drive block; 18. Third drive block; 19. 20. Drive rod; 21. First abutment block; 22. Connecting cylinder; 23. Third bevel gear; 24. Fourth bevel gear; 25. Second winding device; 26. Second water inlet screen; 27. Water collection channel; 28. Drainage channel; 29. ​​Feeding device; 30. Drainage hole; 31. Auxiliary channel; 32. Second drive rod; 33. Second abutment block; 34. Second lifting block; 35. Second guide rod; 36. Second connecting block; 37. Second anchor chain. Detailed Implementation

[0030] The technical solutions of the present utility model will be clearly and completely described below with reference to the accompanying drawings of the embodiments. Obviously, the described embodiments are only some embodiments of the present utility model, and not all embodiments. Based on the embodiments of the present utility model, all other embodiments obtained by those of ordinary skill in the art without creative effort are within the protection scope of the present utility model.

[0031] It should be noted that if the embodiments of this utility model involve directional indicators (such as up, down, left, right, front, back, etc.), the directional indicators are only used to explain the relative positional relationship and movement of the components in a certain specific posture (as shown in the figure). If the specific posture changes, the directional indicators will also change accordingly.

[0032] In this utility model, unless otherwise explicitly specified and limited, the terms "connection," "fixing," etc., should be interpreted broadly. For example, "fixing" can mean a fixed connection, a detachable connection, or an integral part; it can mean a mechanical connection or an electrical connection; it can mean a direct connection or an indirect connection through an intermediate medium; it can mean the internal communication of two components or the interaction between two components, unless otherwise explicitly limited. Those skilled in the art can understand the specific meaning of the above terms in this utility model according to the specific circumstances.

[0033] Furthermore, if the embodiments of this utility model involve descriptions such as "first" or "second," such descriptions are for descriptive purposes only and should not be construed as indicating or implying their relative importance or implicitly specifying the number of technical features indicated. Thus, a feature defined with "first" or "second" may explicitly or implicitly include at least one of those features.

[0034] This utility model proposes a high-efficiency sewage treatment tank. By setting a replacement component, the second inlet screen 25 can be raised and removed from the main body 1 of the sewage tank when it becomes clogged, making it easier to clean. At the same time, the first inlet screen 6 falls into the sedimentation zone 3 for sewage treatment. This allows workers to continue sewage treatment while cleaning the second inlet screen 25, thus improving the treatment efficiency of the sewage treatment tank.

[0035] Example 1:

[0036] In this embodiment, the structure of the sewage treatment tank is shown in Figures 1 to 5, where Figures 2, 4, and 5 only show a portion of the sewage treatment tank, mainly highlighting the parts relevant to this invention. This invention provides a high-efficiency sewage treatment tank comprising a main body 1. The main body 1 contains an inlet zone 2 and a sedimentation zone 3, separated by a barrier wall 4. Support plates 5 are evenly distributed between the barrier wall 4 and the main body 1. The inlet zone 2 forms an inlet buffer zone, allowing sewage to be buffered in the inlet zone 2 before entering the sedimentation zone 3 for sedimentation and purification.

[0037] In this embodiment, the purification system includes a first inlet screen 6, which is slidably installed at the top of the sedimentation zone 3. First lifting blocks 7 are fixedly installed at both ends of the top of the first inlet screen 6. A first guide rod 8 is slidably installed on the inner wall of the first lifting block 7. The first guide rod 8 is fixedly installed at the top of the sewage tank body 1 or the barrier wall 4. A first connecting block 9 is fixedly installed on one side of one of the first lifting blocks 7. A first anchor chain 10 is installed at the top of the first connecting block 9. The other end of the first anchor chain 10 is wound around the outer wall of a first winding device 11. The first winding device 11 is rotatably installed above the sewage tank body 1. A first bevel gear 12 is fixedly installed on one side of the first winding device 11. A second bevel gear 13 is meshed on one side of the first bevel gear 12. A power chamber 14 is provided on one side of the second bevel gear 13. A power device (not shown in the figure) is installed inside the power chamber 14. The power unit is preferably a servo motor, model NMRV. Since it is a mature existing technology, its internal structure will not be described in detail. The power unit is connected to an external power source via wires. The second bevel gear 13 is connected to the output of the servo motor and has a replacement component on the other side. The power unit is located inside the power chamber 14. When treating wastewater, the wastewater to be treated is discharged into the inlet zone 2 and the sedimentation zone 3. The wastewater in the sedimentation zone 3 flows out of the wastewater tank body 1 through the first inlet screen 6, allowing the filter media inside the first inlet screen 6 to intercept impurities in the wastewater, thus completing the wastewater treatment. When a large amount of wastewater is treated, or when the wastewater contains large particles, the first inlet screen 6 becomes clogged. At this time, the second bevel gear 13 can be rotated through the power chamber 14. The second bevel gear 13 drives the first connecting block 9 to rise through the first bevel gear 12, the first winding device 11, and the first anchor chain 10. This causes the first connecting block 9 to rise through the first lifting block 7, facilitating cleaning and maintenance of the first inlet screen 6.

[0038] As shown in Figures 1 to 5, the replacement assembly includes a connecting rod 15 and a second inlet screen 25 disposed on the other side of the second bevel gear 13. A first drive block 16 is fixedly installed at one end of the connecting rod 15. A second drive block 17 is rotatably installed on one side of the first drive block 16. The second drive block 17 is rotatably installed on the outer wall of the connecting rod 15. A third drive block 18 is rotatably installed on the other side of the second drive block 17. The third drive block 18 is rotatably installed on the outer wall of the connecting rod 15. A first drive rod 19 is fixedly installed on one side of one end of the first drive block 16. A first abutment block 20 is fixedly installed on one side of the second drive block 17. A second drive rod 31 is fixedly installed on one side of the first abutment block 20. A second abutment block 32 is fixedly installed on one side of the third drive block 18. Furthermore, both sides of the first abutment block 20 and the second abutment block 32 are provided with arc-shaped grooves. A connecting cylinder 21 is fixedly installed on one side of the third drive block 18, and a third bevel gear 22 is fixedly installed on one side of the connecting cylinder 21. The third bevel gear 22 is rotatably installed on the outer wall of the connecting rod 15. A fourth bevel gear 23 is meshed on one side of the third bevel gear 22, and a second winding device 24 is fixedly installed on one side of the fourth bevel gear 23. A second anchor chain 36 is wound around the outer wall of the second winding device 24. A second connecting block 35 is fixedly connected to one end of the second anchor chain 36, and a second lifting block 33 is fixedly installed at one end of the second connecting block 35. The second lifting blocks 33 are symmetrically installed on both sides of the second inlet screen 25. It should be noted that the second lifting block 33 located on the side of the second anchor chain 36 and the second connecting block 35 are an integral structure. At the same time, a second guide rod 34 is slidably installed on the inner wall of the second lifting block 33, and the second guide rod 34 is fixedly installed on the top of the sewage tank body 1 or the barrier wall 4.It should be noted that after the wastewater treatment tank adopts the replacement components, in daily use, the second inlet screen 25 is used as the normal inlet screen, while the first inlet screen 6 is used as the backup inlet screen. Both the first inlet screen 6 and the second inlet screen 25 are equipped with counterweights at their bottom ends. With this design, when the second inlet screen 25 is blocked and needs to be raised, the second bevel gear 13 drives the connecting rod 15 to rotate, which in turn drives the first drive block 16 to rotate. The first drive block 16 drives the first drive rod 19 to rotate, which in turn drives the first abutment block 20 to rotate. The first abutment block 20 then drives the second drive block 17 and the second drive rod 31 to rotate, causing the second drive rod 31 to rotate and reach the second abutment block 20. Block 32 abuts against and drives the second abutting block 32 to rotate. The second abutting block 32 drives the third driving block 18 to rotate, so that the third driving block 18 drives the second inlet screen 25 to rise and leave the sedimentation zone 3 through the connecting cylinder 21, the third bevel gear 22, the fourth bevel gear 23, the second winding device 24, the second anchor chain 36, the second connecting block 35, and the second lifting block 33. At this time, the second bevel gear 13 drives the first inlet screen 6 to fall into the sedimentation zone 3 through the first bevel gear 12, the first winding device 11, the first anchor chain 10, the first connecting block 9, and the first lifting block 7, completing the replacement of the inlet screen. This ensures that the cleaning and maintenance of the inlet screen will not affect the normal operation of the sewage treatment tank, thus improving the working efficiency of the sewage treatment tank.

[0039] Example 2:

[0040] To better supplement the explanation based on Embodiment 1, according to Figures 1 to 3, in this embodiment, a water collection channel 26 is provided between the first inlet screen 6 and the second inlet screen 25. Both ends of the water collection channel 26 are fixedly installed at the top of the sewage tank body 1 or the barrier wall 4. A drainage channel 27 is provided on the side of the second inlet screen 25 away from the water collection channel 26, and the drainage channel 27 is inclined. The drainage channel 27 is fixedly installed at the top of the support plate 5. This design allows workers to stand on the first inlet screen 6 or the second inlet screen 25 when it becomes blocked and rises. 5. Backwashing is performed on the side near the outlet. At this time, the cleaning water carrying the separated debris is intercepted and collected by the collection channel 26 and the drainage channel 27, and flows through the drainage channel 27 to the end of the sedimentation zone 3 away from the purification system, thus sinking into the sludge hopper (not shown in the figure) set at the bottom of the sedimentation zone 3. This avoids the problem that when the first inlet screen 6 or the second inlet screen 25 is raised for backwashing, the separated debris is easily scattered around the first inlet screen 6 or the second inlet screen 25, which may easily cause the first inlet screen 6 or the second inlet screen 25 to become blocked again, thus affecting the working efficiency of the sewage treatment tank.

[0041] In this embodiment, a feeding device 28 is provided at the top of the drainage channel 27 near the second inlet screen 25. When backwashing the first inlet screen 6 or the second inlet screen 25, flocculant can be sprayed onto the cleaning water through the feeding device 28, allowing the particles in the cleaning water to better coagulate and aggregate, thereby causing more impurities to fall into the sludge hopper at the bottom of the sedimentation zone 3, improving the purification effect of the sewage treatment tank. Furthermore, drainage holes 29 are evenly provided on both sides of the drainage channel 27. The distance between the drainage hole 29 and the bottom of the drainage channel 27 gradually decreases from the side near the second inlet screen 25 to the other side. This design allows the cleaning water at a higher water level in the drainage channel 27 to flow out of the drainage channel 27 along the drainage holes 29, thereby ensuring that the cleaning water with added flocculant falls evenly into the sedimentation zone 3, further enhancing the purification effect of the sewage treatment tank.

[0042] As shown in Figures 1 and 2, in this embodiment, an auxiliary channel 30 is fixedly installed at the top of the second inlet screen 25. When the second rewinder 24 performs filtration and purification operations, the auxiliary channel 30 can connect the collection channel 26 and the drainage channel 27 to collect and gather the cleaning water and separated impurities from the backwashing of the first inlet screen 6. The auxiliary channel 30 has protruding strips on both sides, and the collection channel 26 and the drainage channel 27 are provided with corresponding sliding grooves on the side close to the auxiliary channel 30. This design can provide limiting and guiding functions for the movement of the auxiliary channel 30, making the sewage treatment tank more stable and reliable.

[0043] The above description is only a preferred embodiment of the present utility model and does not limit the patent scope of the present utility model. All equivalent structural transformations made under the inventive concept of the present utility model using the contents of the present utility model specification and drawings, or direct / indirect applications in other related technical fields, are included within the patent protection scope of the present utility model.

Claims

1. A high-efficiency sewage treatment tank, characterized in that, The system comprises two parts: a wastewater treatment tank and a purification system. The wastewater treatment tank includes a main body (1), which has an inlet zone (2) and a sedimentation zone (3) inside. The inlet zone (2) and the sedimentation zone (3) are separated by a barrier wall (4), and a support plate (5) is evenly arranged between the barrier wall (4) and the main body (1). The purification system includes a first inlet screen (6), which is slidably installed on the top of the sedimentation zone (3). A first lifting block (7) is fixedly installed at both ends of the top of the first inlet screen (6), and a first guide rod (8) is slidably installed on the inner wall of the first lifting block (7). The first guide rod (8) is fixedly installed on the inner wall of the first lifting block (7). At the top of the main body (1) of the sewage tank or the barrier wall (4), a first connecting block (9) is fixedly installed on one side of the first lifting block (7), a first anchor chain (10) is installed at the top of the first connecting block (9), and the other end of the first anchor chain (10) is wrapped around the outer wall of the first winding device (11). The first winding device (11) is rotatably installed above the main body (1) of the sewage tank. A first bevel gear (12) and a second bevel gear (13) are fixedly installed on one side of the first winding device (11). A power chamber (14) is provided on one side of the second bevel gear (13), and a replacement component is provided on the other side of the second bevel gear (13) so that the sewage treatment plant can also carry out sewage treatment normally during cleaning.

2. The high-efficiency sewage treatment tank as described in claim 1, characterized in that, The replacement assembly includes a connecting rod (15) and a second inlet screen (25) disposed on one side of the second bevel gear (13). A first driving block (16) is fixedly installed at one end of the connecting rod (15). A second driving block (17) is rotatably installed on one side of the first driving block (16). The second driving block (17) is rotatably installed on the outer wall of the connecting rod (15). A third driving block (18) is rotatably installed on the other side of the second driving block (17). The third driving block (18) is rotatably installed on the outer wall of the connecting rod (15). A first driving rod (19) is fixedly installed on one side of one end of the first driving block (16). A first abutting block (20) is fixedly installed on one side of the second driving block (17). A second driving rod (31) is fixedly installed on one side of the first abutting block (20). A second abutting block (32) is fixedly installed on one side of the third driving block (18). A connecting cylinder (21) is fixedly installed on one side of the connecting cylinder (21). A third bevel gear (22) is fixedly installed on one side of the connecting cylinder (21). The third bevel gear (22) is rotatably installed on the outer wall of the connecting rod (15). A fourth bevel gear (23) is meshed on one side of the third bevel gear (22). A second winding device (24) is fixedly installed on one side of the fourth bevel gear (23). A second anchor chain (36) is wound around the outer wall of the second winding device (24). A second connecting block (35) is fixedly connected to one end of the second anchor chain (36). A second lifting block (33) is fixedly installed at one end of the second connecting block (35). The second lifting blocks (33) are symmetrically installed on both sides of the second inlet screen (25). A second guide rod (34) is slidably installed on the inner wall of the second lifting block (33). The second guide rod (34) is fixedly installed on the top of the sewage tank body (1) or the barrier wall (4).

3. The high-efficiency sewage treatment tank as described in claim 2, characterized in that, The bottom ends of the first inlet screen (6) and the second inlet screen (25) are both equipped with counterweights.

4. The high-efficiency sewage treatment tank as described in claim 2, characterized in that, Both sides of the first abutment block (20) are provided with arc-shaped grooves.

5. The high-efficiency sewage treatment tank as described in claim 2, characterized in that, A water collection channel (26) is provided between the first water inlet screen (6) and the second water inlet screen (25). The two ends of the water collection channel (26) are fixedly installed on the top of the sewage tank body (1) or the barrier wall (4). A drainage channel (27) is provided on the side of the second water inlet screen (25) away from the water collection channel (26), and the drainage channel (27) is set in an inclined shape. The drainage channel (27) is fixedly installed on the top of the support plate (5).

6. The high-efficiency sewage treatment tank as described in claim 5, characterized in that, A feeding device (28) is provided at the top of the drainage ditch (27) near the second inlet screen (25).

7. The high-efficiency sewage treatment tank as described in claim 5, characterized in that, Drainage holes (29) are evenly provided on both sides of the drainage ditch (27).

8. The high-efficiency sewage treatment tank as described in claim 7, characterized in that, The distance between the bottom of the drainage hole (29) and the drainage channel (27) gradually decreases from the side closer to the second inlet screen (25) to the other side.

9. The high-efficiency sewage treatment tank as described in claim 5, characterized in that, An auxiliary channel (30) is fixedly installed at the top of the second inlet screen (25).

10. The high-efficiency sewage treatment tank as described in claim 9, characterized in that, The auxiliary channel (30) is provided with protruding strips on both sides, and the water collection channel (26) and the drainage channel (27) are provided with corresponding chutes on the side of the auxiliary channel (30).