Semi-closed semi-underground sewage treatment system

Abstract

The invention discloses a semi-closed semi-underground sewage treatment system, and relates to the technical field of municipal sewage treatment engineering. Comprising a sewage treatment plant body, the sewage treatment plant body is partially deeply buried underground and partially arranged above the ground, a ground park is arranged at the top of the sewage treatment plant body, one side or two sides of the sewage treatment plant body are closed sides, and a plurality of daylighting skylights are arranged at the tops of the closed sides; a plurality of adjustable flow guide grid plates are arranged on the unclosed side of the sewage treatment plant main body. Through the design of the closed side inclined slope body, the ground and the roof park are connected into a whole, so that tourists are in a water plant but do not see the plant, meanwhile, no evacuation staircase of a full-underground sewage plant exists, no intersection exists between the tourists and operation of the water plant, and the landscape effect better than that of the full-underground sewage plant is achieved; and through the design of the flow guide grid plate and the driving mechanism, the angle of the flow guide grid plate can be adjusted according to the test value requirement of the aerovane, so that the air volume requirement of space ventilation is met.

Description

Technical Field

[0001] The present invention relates to the technical field of municipal sewage treatment engineering, and particularly relates to a semi-closed and semi-underground sewage treatment system. Background Art

[0002] With the development and expansion of cities, the tense land use conditions, and the improvement of the public's environmental protection awareness, more and more cities have chosen fully underground (fully enclosed) or semi-underground sewage treatment plants, and built the above-ground part into a landscape or sports park, which can meet the needs of municipal sewage and residents' leisure and relaxation places. However, there are also some problems:

[0003] 1. Fully underground type: relying on artificial lighting and mechanical ventilation, with high operating energy consumption; deep foundation pit support and fully enclosed structure result in a 40% higher civil engineering cost than the semi-underground type; the ground structures such as evacuation stairwells and ventilation shafts damage the integrity of the landscape.

[0004] 2. Semi-underground type: the above-ground pool bodies and equipment are exposed, and tourists can directly observe the operation of the plant area, posing a safety hazard; the fixed ventilation openings are prone to form air dead zones, and continuous mechanical air supply is required; the suspended park requires a separate passage, posing a risk of people straying into it.

[0005] In view of the above problems, the present invention proposes a semi-closed and semi-underground sewage treatment system, providing a new solution to solve the above technical problems. Summary of the Invention

[0006] In order to overcome the problems existing in the above background art, the present invention provides a semi-closed and semi-underground sewage treatment system, realizing landscape integration, energy conservation and consumption reduction, and safe operation.

[0007] The technical solution adopted by the present invention to solve the above technical problems is as follows:

[0008] The present invention proposes a semi-closed and semi-underground sewage treatment system including the main body of the sewage treatment plant. The main body of the sewage treatment plant is partially buried below the ground and partially located above the ground. A ground park is provided on the top of the main body of the sewage treatment plant. One side or both sides of the main body of the sewage treatment plant are set as closed sides, and the closed sides are set as fully enclosed structures made of reinforced concrete. A plurality of daylighting skylights are provided on the top of the closed sides; a plurality of adjustable flow guiding grille plates are provided on the unclosed side of the main body of the sewage treatment plant, and a plurality of groups of driving mechanisms are provided for driving the movement of the grille plates.

[0009] Preferably, the closed side adopts an inclined slope design with soil covering on the slope surface. The top of the slope is connected to the ground park, and the bottom is connected to the ground. The inclined slope transitions to the ground in the form of slope or terraced land, and the soil covering thickness of the inclined slope meets the vegetation planting requirements.

[0010] Preferably, the flow guiding grid plate should ensure a certain light transmittance, and its strength should meet the local wind load requirements. The surface of the flow guiding grid plate can be covered with decorative materials.

[0011] Preferably, a number of flow guiding fans are installed inside the main body of the sewage treatment plant, and a number of wind direction and wind speed sensors are installed on the top of the main body of the sewage treatment plant.

[0012] Preferably, the daylighting skylight should meet the light transmission requirements. The area of the daylighting skylight, combined with the light transmission of the light guide pipe and the flow guiding grid plate, can meet the daylighting requirements of the underground operation layer.

[0013] Preferably, each set of the driving mechanisms drives a number of flow guiding grid plates to move. The driving mechanism includes a transmission box arranged on the tops of a number of the flow guiding grid plates. The flow guiding grid plates are rotatably connected to the transmission box. A transmission plate is fixed inside the transmission box at the top of the flow guiding grid plate. The ends of two adjacent transmission plates are rotatably connected by a transmission rod. Each set of transmission plates and transmission rods is arranged in an S-shaped reciprocating bend. The driving mechanism includes a first driving motor, and the output end of the first driving motor is connected to a transmission shaft, and the transmission shaft is fixed to one of the transmission plates.

[0014] Preferably, a sealing protrusion is provided on one side surface of one end of the flow guiding grid plate, and a sealing groove matching with the sealing protrusion is formed on the side surface of the other end far away from the sealing protrusion. Two adjacent flow guiding grid plates can be overlapped with each other through the sealing protrusion and the sealing groove. When two adjacent flow guiding grid plates are overlapped with each other, the sealing protrusion is embedded inside the corresponding sealing groove to seal the two adjacent flow guiding grid plates. Preferably, the flow guiding grid plate includes grid plate one, grid plate two, grid plate three and grid plate four which are arranged in sequence from top to bottom, and grid plate one, grid plate two, grid plate three and grid plate four are arranged in an inclined and staggered manner.

[0015] Preferably, a connecting pipe one is fixed inside grid plate one, and the top of the connecting pipe one penetrates through the transmission box; a connecting pipe two is fixed inside grid plate two, and the connecting pipe two passes through the connecting pipe one and extends out; a connecting pipe three is fixed inside grid plate three, and the connecting pipe three passes through the connecting pipe two and extends out; a connecting pipe four is fixed at the top of grid plate four, and the connecting pipe four passes through the connecting pipe three and extends out.

[0016] Preferably, the driving mechanism includes a fifth driving wheel fixed to the top outside of the first connecting pipe, a sixth driving wheel fixed to the top outside of the second connecting pipe, a seventh driving wheel fixed to the top outside of the third connecting pipe, and an eighth driving wheel fixed to the top outside of the fourth connecting pipe. A first transmission belt is connected to the outside of several of the fifth driving wheels, a second transmission belt is connected to the outside of several of the sixth driving wheels, a third transmission belt is connected to the outside of several of the seventh driving wheels, and a fourth transmission belt is connected to the outside of several of the eighth driving wheels. A second driving motor, a third driving motor, a fourth driving motor, and a fifth driving motor are installed on the main body of the sewage treatment plant above the transmission box. A first driving wheel is fixed to the output end of the second driving motor. A first transmission wheel is fixed to the top outside of one of the first connecting pipes. A first driving belt is connected to the outside of the first driving wheel and the first transmission wheel. A second driving wheel is fixed to the output end of the third driving motor. A second transmission wheel is fixed to the top outside of one of the second connecting pipes. A second driving belt is connected to the outside of the second driving wheel and the second transmission wheel. A third driving wheel is fixed to the output end of the fourth driving motor. A third transmission wheel is fixed to the top outside of one of the third connecting pipes. A third driving belt is connected to the outside of the third driving wheel and the third transmission wheel. A fourth driving wheel is fixed to the output end of the fifth driving motor. A fourth transmission wheel is fixed to the top outside of one of the fourth connecting pipes. A fourth driving belt is connected to the outside of the fourth driving wheel and the fourth transmission wheel.

[0017] In summary, the advantages of the present invention are as follows:

[0018] 1. Through the design of the closed-side inclined slope, the ground and the rooftop park are integrated into one, enabling visitors to be in the water treatment plant without seeing the plant, and at the same time, there is no evacuation staircase in the fully underground sewage treatment plant, which has no intersection with the operation of the water treatment plant, achieving a better landscape effect than the fully underground sewage treatment plant.

[0019] 2. Through the setting of the wind direction and speed meter, the wind speed and wind direction at the site are measured in real time, and through the design of the flow guiding grille and the driving mechanism, the angle of the flow guiding grille can be adjusted according to the test value requirements of the wind direction and speed meter, so as to meet the air volume requirements of space ventilation. At the same time, the unenclosed sides can meet the natural lighting requirements of most areas, and the enclosed sides can meet the daytime natural lighting requirements through the skylights set on the roof.

[0020] 3. By setting a flow guiding fan in the main body of the sewage treatment plant, the air flow in the space is ensured and there is no dead zone.

[0021] 4. Through the setting of the first grille, the second grille, the third grille, and the fourth grille and the structural design of the driving mechanism, the inclination angles of the first grille, the second grille, the third grille, or the fourth grille can be adjusted separately at the same time to adapt to different air inlet requirements, greatly improving the adaptability and practicality in use.

[0022] 5. Through the design of sealing protrusions and sealing grooves, several guide grids can be overlapped and sealed to form an overall sealing structure, which can effectively prevent the leakage of harmful gases inside the factory when there are harmful gases inside the factory. BRIEF DESCRIPTION OF THE DRAWINGS

[0023] The present application is further described below with reference to the accompanying drawings:

[0024] Figure 1 It is a schematic diagram of the overall structure of the present invention;

[0025] Figure 2 Schematic diagram of the overall structure of the guide grid and the driving mechanism of the present invention;

[0026] Figure 3 Schematic diagram of the structure of the guide grid and the driving mechanism;

[0027] Figure 4 It is a structural diagram of the sealing protrusion and the sealing groove;

[0028] Figure 5 Schematic diagram of the structure of grid plate 1, grid plate 2, grid plate 3 and grid plate 4;

[0029] Figure 6 Schematic diagram of the structure of connecting pipe 1, connecting pipe 2, connecting pipe 3, and connecting pipe 4;

[0030] Figure 7 Schematic diagram of the drive mechanism Figure 1 ;

[0031] Figure 8 Schematic diagram of the drive mechanism Figure 2 .

[0032] Description of reference numerals:

[0033] In the picture:

[0034] 1. Main body of sewage treatment plant; 2. Enclosed side; 3. Flow guiding grid plate; 31. Grid plate one; 32. Grid plate two; 33. Grid plate three; 34. Grid plate four; 35. Sealing protrusion; 36. Sealing groove; 4. Flow guiding fan; 5. Transmission box; 6. Transmission plate; 7. Transmission rod; 8. Driving motor; 9. Transmission shaft; 10. Connecting pipe four; 11. Connecting pipe three; 12. Connecting pipe two; 13. Connecting pipe one; 14. Fifth transmission wheel; 15. Sixth transmission wheel; 16. Seventh transmission wheel; 17. Eighth transmission wheel; 18. First transmission belt; 19. Second transmission belt; 20. Third transmission belt; 21. Fourth transmission belt; 22. First transmission wheel; 23. First driving wheel; 24. First driving belt; 25. Second transmission wheel; 26. Second driving wheel; 27. Second driving belt; 28. Second driving motor; 29. Third driving motor; 41. Third transmission wheel; 42. Third driving wheel; 43. Third driving belt; 44. Fourth driving motor; 45. Fourth transmission wheel; 46. Fourth driving wheel; 47. Fourth driving belt; 48. Fifth driving motor. Detailed implementation mode

[0035] Based on the above structural features of the present application, the implementation mode of the present application will be further described:

[0036] Embodiment 1

[0037] Refer to Figure 1-8 , this embodiment provides a semi-closed and semi-underground sewage treatment plant, including the main body 1 of the sewage treatment plant. Part of the main body 1 of the sewage treatment plant is deeply buried below the ground, with a burial depth of 4 - 6 m below the ground, and part is located above the ground. There is a ground park on the top of the main body 1 of the sewage treatment plant. One side or both sides of the main body 1 of the sewage treatment plant are set as the enclosed side 2. The enclosed side 2 is set as a fully enclosed structure made of reinforced concrete. There are several daylighting skylights on the top of the enclosed side 2. A number of adjustable flow guiding grid plates 3 are arranged on the unenclosed side of the main body 1 of the sewage treatment plant, and several groups of driving mechanisms are arranged to drive the movement of the flow guiding grid plates 3. The light transmission area ratio of the flow guiding grid plates 3 on the unenclosed side is greater than or equal to 85%, meeting 70% - 80% of the daylighting requirements of the plant area. The setting of the flow guiding grid plates 3 can play the role of light transmission and ventilation, and at the same time play a decorative and beautiful role, while completely isolating the tourist activity area from the plant operation space, reducing the project investment.

[0038] Refer to Figure 1 , the enclosed side 2 adopts an inclined slope design with soil covering on the slope surface. The enclosed side 2 adopts an inclined slope design with soil covering on the slope surface. The top of the slope is connected to the ground park, and the bottom is connected to the ground. The inclined slope transitions to the ground in the form of slope or terrace, and the soil covering thickness of the inclined slope meets the vegetation planting requirements.

[0039] The slope surface of the inclined slope body is protected by ecological concrete and planted with local shade-tolerant vegetation (such as ferns and ivy). The traditional evacuation staircase is cancelled, and a hidden folding emergency passage is integrated into the closed side slope body, which is only enabled in case of emergency, eliminating the exposed ground evacuation staircase and equipment, and creating a complete landscape park without visual interference.

[0040] The flow guide grille 3 should ensure a certain light transmittance, and its strength should meet the local wind load requirements. The surface of the flow guide grille 3 can be covered with decorative materials to form a visual barrier, so that tourists can be in the water treatment plant without seeing the plant, achieving a better landscape effect than a fully underground sewage treatment plant.

[0041] A number of flow guide fans 4 are installed inside the main body 1 of the sewage treatment plant, and are regulated in zones according to the wind speed of 0.3 - 1.2 m / s. The method of eliminating dead zones by combining computational fluid dynamics simulation is an existing technology and will not be elaborated here. A number of wind speed and direction sensors are installed on the top of the main body 1 of the sewage treatment plant. The wind speed and direction sensors use Doppler laser anemometers with an accuracy of ±0.2 m / s to collect external wind speed and direction data in real time. When the external wind speed is greater than 3 m / s, the opening angle of the flow guide grille is less than or equal to 30°, and natural wind pressure is used to dominate the ventilation. When the air quality index in the inspection space of the sewage treatment plant is abnormal, the fan forced exhaust mode is automatically started.

[0042] The daylighting skylight should meet the light transmission requirements. The area of the daylighting skylight, combined with the light transmission of the light guide pipe and the flow guide grille 3, can meet the daylighting requirements of the underground operation layer.

[0043] Illuminance sensors with a range of 0 - 2000 lux are installed in the underground layer of the main body of the sewage treatment plant. When the daylight intensity is less than 150 lux, lighting supplementary lighting is started in zones, taking into account the needs of equipment inspection and safety monitoring.

[0044] Each set of driving mechanisms drives a number of flow guide grilles 3 to move. The driving mechanism includes a transmission box 5 arranged on the top of a number of flow guide grilles 3. The flow guide grille 3 is rotatably connected to the transmission box 5. A transmission plate 6 is fixed inside the transmission box 5 at the top of the flow guide grille 3. The ends of adjacent two transmission plates 6 are rotatably connected with a transmission rod 7. Each set of transmission plates 6 and transmission rods 7 are arranged in an S-shaped reciprocating bend. The driving mechanism includes a driving motor 8. The output end of the driving motor 8 is connected with a transmission shaft 9. The transmission shaft 9 is fixed to one of the transmission plates 8. When it is necessary to adjust the angle of the flow guide grille 3, the driving motor 8 is started to drive the transmission shaft 9 to rotate, and drives the transmission plate 6 connected thereto to rotate through the transmission shaft 9, and then drives a set of transmission plates 6 to rotate simultaneously through the transmission rod 7, thereby driving a set of flow guide grilles 3 to rotate, so as to adjust the angle of the flow guide grille. The opening and closing angle is dynamically adjusted according to the monitoring data, and its angle opening and closing range is from 0° to 85°, and it is ensured that the ventilation volume is not less than 12 times per hour.

[0045] The flow guiding grid plate 3 includes a first grid plate 31, a second grid plate 32, a third grid plate 33, and a fourth grid plate 34 arranged in sequence from top to bottom. The first grid plate 31, the second grid plate 32, the third grid plate 33, and the fourth grid plate 34 are arranged in an inclined and staggered manner, so that the flow guiding grid plate 3 has more air inlet angles. Compared with a single air inlet angle, its air inlet efficiency is better. It should be noted that the first grid plate 31 and the fourth grid plate 34 are located above and below respectively, the second grid plate 32 and the third grid plate 33 are located between the first grid plate 31 and the fourth grid plate 34, and the lengths of the first grid plate 31 and the fourth grid plate 34 are longer than those of the second grid plate 32 and the third grid plate 33, so that the first grid plate 31 and the fourth grid plate 34 are used for main air inlet and light transmission distribution.

[0046] On one side of one end of the flow guiding grid plate 3, there is a sealing protrusion 35. The material of the sealing protrusion 35 can be selected as rubber. On one side of the other end far from the sealing protrusion 35, there is a sealing groove 36 matching it. Two adjacent flow guiding grid plates 3 can be overlapped with each other through the sealing protrusion 35 and the sealing groove 36. When two adjacent flow guiding grid plates 3 are overlapped with each other, the sealing protrusion 35 is embedded in the inner side of the corresponding sealing groove 36 and abutted tightly, so as to seal two adjacent flow guiding grid plates 3. In order to improve the sealing effect, the sealing protrusion 35 can be set as multiple.

[0047] Embodiment 2

[0048] The flow guiding grid plate 3 includes a first grid plate 31, a second grid plate 32, a third grid plate 33, and a fourth grid plate 34 arranged in sequence from top to bottom. The first grid plate 31, the second grid plate 32, the third grid plate 33, and the fourth grid plate 34 are arranged in an inclined and staggered manner.

[0049] A first connecting pipe 13 is fixed inside the first grid plate 31, and the top of the first connecting pipe 13 penetrates through the transmission box 5; a second connecting pipe 12 is fixed inside the second grid plate 32, and the second connecting pipe 12 passes through the first connecting pipe 13 and extends out; a third connecting pipe 11 is fixed inside the third grid plate 33, and the third connecting pipe 11 passes through the second connecting pipe 12 and extends out; a fourth connecting pipe 10 is fixed at the top of the fourth grid plate 34, and the fourth connecting pipe 10 passes through the third connecting pipe 11 and extends out, so that the movements between the first connecting pipe 13, the second connecting pipe 12, the third connecting pipe 11, and the fourth connecting pipe 10 are independent of each other, thereby facilitating the individual adjustment of the inclination angle of one of the flow guiding grid plates.

[0050] Refer to Figures 5-8, the driving mechanism includes a fifth driving wheel 14 fixed to the outer top of the first connecting pipe 13, a sixth driving wheel 15 fixed to the outer top of the second connecting pipe 12, a seventh driving wheel 16 fixed to the outer top of the third connecting pipe 11, and an eighth driving wheel 17 fixed to the outer top of the fourth connecting pipe 10. A first transmission belt 18 is connected to the outside of several fifth driving wheels 14, a second transmission belt 19 is connected to the outside of several sixth driving wheels 15, a third transmission belt 20 is connected to the outside of several seventh driving wheels 16, and a fourth transmission belt 21 is connected to the outside of several eighth driving wheels 17. A second driving motor 28, a third driving motor 29, a fourth driving motor 44, and a fifth driving motor 48 are installed on the main body 1 of the sewage treatment plant and above the transmission box 5. A first driving wheel 23 is fixed to the output end of the second driving motor 28. A first transmission wheel 22 is fixed to the outer top of one of the first connecting pipes 13. A first driving belt 24 is connected to the outside of the first driving wheel 23 and the first transmission wheel 22; a second driving wheel 26 is fixed to the output end of the third driving motor 29. A second transmission wheel 25 is fixed to the outer top of one of the second connecting pipes 12. A second driving belt 27 is connected to the outside of the second driving wheel 26 and the second transmission wheel 25; a third driving wheel 42 is fixed to the output end of the fourth driving motor 44. A third transmission wheel 41 is fixed to the outer top of one of the third connecting pipes 11. A third driving belt 43 is connected to the outside of the third driving wheel 42 and the third transmission wheel 41; a fourth driving wheel 46 is fixed to the output end of the fifth driving motor 48. A fourth transmission wheel 45 is fixed to the outer top of one of the fourth connecting pipes 10. A fourth driving belt 47 is connected to the outside of the fourth driving wheel 46 and the fourth transmission wheel 45. When it is necessary to adjust the inclination angle of the first grid plate 31, the second driving motor 28 is started to drive the first driving wheel 23 to rotate, and the first transmission wheel 22 is driven to rotate through the first driving belt 24, so as to drive the corresponding first grid plate 31 to rotate. At the same time, several fifth driving wheels 14 are driven to rotate through the first transmission belt 18, so as to adjust the inclination angles of several first grid plates 31 simultaneously;

[0051] When it is necessary to adjust the inclination angle of the second grid plate 32, the third driving motor 29 is started to drive the second driving wheel 26 to rotate, and the second transmission wheel 25 is driven to rotate through the second driving belt 27, so as to drive the corresponding second grid plate 32 to rotate. At the same time, several sixth driving wheels 15 are driven to rotate through the second transmission belt 19, so as to adjust the inclination angles of several second grid plates 32 simultaneously;

[0052] When it is necessary to adjust the inclination angle of the third grid plate 33, the fourth driving motor 44 is started to drive the third driving wheel 42 to rotate, and the third transmission wheel 41 is driven to rotate through the third driving belt 43, so as to drive the corresponding third grid plate 33 to rotate. At the same time, several seventh driving wheels 16 are driven to rotate through the third transmission belt 20, so as to adjust the inclination angles of several third grid plates 33 simultaneously;

[0053] When it is necessary to adjust the tilt angle of the fourth grid plate 34, the fifth drive motor 48 starts to drive the fourth drive wheel 46 to rotate, and drives the fourth transmission wheel 45 to rotate through the fourth drive belt 47, thereby driving the corresponding fourth grid plate 34 to rotate. At the same time, it drives a plurality of eighth transmission wheels 17 to rotate through the fourth drive belt 21, thereby adjusting the tilt angles of several fourth grid plates 34 simultaneously.

[0054] In the description of the present invention, it should be noted that the orientation or positional relationship indicated by the terms "upper", "lower", "left", "right", etc. is based on the orientation or positional relationship shown in the drawings. It is only for the convenience of describing the present invention and simplifying the description, rather than indicating or implying that the device or element referred to must have a specific orientation, be constructed and operated in a specific orientation. Therefore, it should not be construed as a limitation to the present invention.

[0055] In the description of the present invention, it should also be noted that unless otherwise clearly specified and limited, the terms "set", "installed", "connected" should be understood in a broad sense. For example, it can be a fixed connection, a detachable connection, or an integral connection. It can be a mechanical connection, an electrical connection, a direct connection, or a connection through an intermediate medium. It can be the communication inside two elements. For those of ordinary skill in the art, the specific meanings of the above terms in the present invention can be understood according to specific situations.

[0056] In summary, for those skilled in the art, guided by the present invention, without departing from the principles and spirit of the present invention, the changes, modifications, substitutions, and deformations made to the present invention still fall within the protection scope of the present invention.

Claims

1. A semi-closed and semi-underground sewage treatment system, characterized in that: It includes the main body of the sewage treatment plant (1), part of the main body of the sewage treatment plant (1) is deeply buried below the ground and part is located above the ground. There is a ground park on the top of the main body of the sewage treatment plant (1). Along one side or both sides of the main body of the sewage treatment plant (1), it is set as a closed side (2). The closed side (2) is set as a fully enclosed structure made of reinforced concrete. There are several daylighting skylights on the top of the closed side (2). On the unclosed side of the main body of the sewage treatment plant (1), several adjustable flow guiding grille plates (3) are provided and several groups of driving mechanisms are provided to drive the movement of the flow guiding grille plates (3).

2. The semi-closed and semi-underground sewage treatment system according to claim 1, characterized in that: The closed side (2) adopts an inclined slope design with soil covering on the slope. The top of the slope is connected to the ground park, and the bottom is connected to the ground. The inclined slope transitions to the ground in the form of a slope or a terrace. The soil covering thickness of the inclined slope meets the vegetation planting requirements.

3. The semi-closed and semi-underground sewage treatment system according to claim 2, wherein: The flow guiding grille plate (3) should ensure a certain light transmittance, and the strength should meet the local wind load requirements. The surface of the flow guiding grille plate (3) can be covered with decorative materials.

4. The semi-closed and semi-underground sewage treatment system according to claim 1, wherein: Several flow guiding fans (4) are installed inside the main body of the sewage treatment plant (1), and several wind direction and wind speed sensors are installed on the top of the main body of the sewage treatment plant (1).

5. The semi-closed and semi-underground sewage treatment system according to claim 1, wherein: The daylighting skylight should meet the light transmission requirements. The area of the daylighting skylight, combined with the light transmission of the light guide pipe and the flow guiding grille plate (3), can meet the daylighting requirements of the underground operation layer.

6. The semi-closed and semi-underground sewage treatment system according to claim 1, characterized in that: Each group of the driving mechanisms drives several flow guiding grille plates (3) to move. The driving mechanism includes a transmission box (5) arranged on the top of several flow guiding grille plates (3). The flow guiding grille plate (3) is rotatably connected to the transmission box (5). A transmission plate (6) is fixed inside the transmission box (5) at the top of the flow guiding grille plate (3). The ends of two adjacent transmission plates (6) are rotatably connected with a transmission rod (7). Between each group of transmission plates (6) and the transmission rod (7), it is arranged in an S-shaped reciprocating bend. The driving mechanism includes a first driving motor (8). The output end of the first driving motor (8) is connected with a transmission shaft (9), and the transmission shaft (9) is fixed to one of the transmission plates (6).

7. The semi-closed and semi-underground sewage treatment system according to claim 6, characterized in that: On one side surface of one end of the flow guiding grille plate (3), there is a sealing protrusion (35). On the side surface of the other end far from the sealing protrusion (35), there is a sealing groove (36) matching it. Two adjacent flow guiding grille plates (3) can be overlapped with each other through the sealing protrusion (35) and the sealing groove (36). When two adjacent flow guiding grille plates (3) are overlapped with each other, the sealing protrusion (35) is embedded inside the corresponding sealing groove (36) to seal two adjacent flow guiding grille plates (3).

8. The semi-closed and semi-underground sewage treatment system according to claim 1, wherein: The flow guiding grille plate (3) includes a grille plate one (31), a grille plate two (32), a grille plate three (33), and a grille plate four (34) arranged in sequence from top to bottom. The grille plate one (31), the grille plate two (32), the grille plate three (33), and the grille plate four (34) are arranged in an inclined and staggered manner.

9. The semi-closed and semi-underground sewage treatment system according to claim 8, characterized in that: Inside the first grid plate (31), a first connecting pipe (13) is fixed, and the top of the first connecting pipe (13) penetrates through the transmission box (5); inside the second grid plate (32), a second connecting pipe (12) is fixed, and the second connecting pipe (12) passes through the first connecting pipe (13) and extends out; inside the third grid plate (33), a third connecting pipe (11) is fixed, and the third connecting pipe (11) passes through the second connecting pipe (12) and extends out; at the top of the fourth grid plate (34), a fourth connecting pipe (10) is fixed, and the fourth connecting pipe (10) passes through the third connecting pipe (11) and extends out.

10. The semi-closed and semi-underground sewage treatment system according to claim 9, wherein: The driving mechanism includes a fifth driving wheel (14) fixed to the outer top of the first connecting pipe (13), a sixth driving wheel (15) fixed to the outer top of the second connecting pipe (12), a seventh driving wheel (16) fixed to the outer top of the third connecting pipe (11), and an eighth driving wheel (17) fixed to the outer top of the fourth connecting pipe (10). A first driving belt (18) is connected to the outside of several fifth driving wheels (14), a second driving belt (19) is connected to the outside of several sixth driving wheels (15), a third driving belt (20) is connected to the outside of several seventh driving wheels (16), and a fourth driving belt (21) is connected to the outside of several eighth driving wheels (17). A second driving motor (28), a third driving motor (29), a fourth driving motor (44), and a fifth driving motor (48) are installed on the main body (1) of the sewage treatment plant and above the transmission box (5). A first driving wheel (23) is fixed to the output end of the second driving motor (28), and a first driving wheel (22) is fixed to the outer top of one of the first connecting pipes (13). A first driving belt (24) is connected to the outside of the first driving wheel (23) and the first driving wheel (22); a second driving wheel (26) is fixed to the output end of the third driving motor (29), and a second driving wheel (25) is fixed to the outer top of one of the second connecting pipes (12). A second driving belt (27) is connected to the outside of the second driving wheel (26) and the second driving wheel (25); a third driving wheel (42) is fixed to the output end of the fourth driving motor (44), and a third driving wheel (41) is fixed to the outer top of one of the third connecting pipes (11). A third driving belt (43) is connected to the outside of the third driving wheel (42) and the third driving wheel (41); a fourth driving wheel (46) is fixed to the output end of the fifth driving motor (48), and a fourth driving wheel (45) is fixed to the outer top of one of the fourth connecting pipes (10). A fourth driving belt (47) is connected to the outside of the fourth driving wheel (46) and the fourth driving wheel (45).

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