Wastewater treatment tank

Abstract

The utility model relates to the technical field of wastewater treatment, and discloses a wastewater treatment pond which comprises a pretreatment pond, a protective shell is arranged at the top end of the pretreatment pond, a first base is arranged in the protective shell, a first motor is fixedly connected to the upper end of the first base, a first rotating shaft is fixedly connected to the output end of the first motor, and a second rotating shaft is fixedly connected to the output end of the first rotating shaft. The other end of the first rotating shaft is fixedly connected with a first bevel gear, the upper middle portion of the protective shell is rotationally connected with a second rotating shaft, the upper end of the second rotating shaft is fixedly connected with a second bevel gear, the first bevel gear is in meshed connection with the second bevel gear, the bottom of the second rotating shaft is fixedly connected with a fixing block, and the outer wall of the fixing block is fixedly connected with a thick rotating shaft. According to the utility model, the sewage in the sewage treatment tank is in an active state and is prevented from sinking, and the problems that microorganisms in the biochemical reactor excessively breed and substances sink in a static state due to the existence of a large number of organic matters, so that the phenomena of blockage and even failure are caused are solved.

Description

Technical Field

[0001] The utility model relates to the technical field of wastewater treatment, in particular to a wastewater treatment pool. Background Art

[0002] A wastewater treatment pool is a facility used to treat wastewater. The main function of a wastewater treatment pool is to remove pollutants from wastewater through a series of physical, chemical and biological processes, so that the wastewater meets the national emission standards or water quality requirements for reuse.

[0003] After searching, the Chinese patent announcement number is: CN108373190B, which discloses a wastewater treatment pool, including a wastewater collection box and a treatment pool located below the wastewater collection box, wherein the treatment pool is provided with two partitions that are sealed with the inner wall of the treatment pool, and the two partitions are respectively formed with the inner wall of the treatment pool to form a first chamber and a second chamber, wherein the first chamber and the second chamber are respectively provided with a magnetic plate that can be moved left and right, and a collection tank is provided below the partition, and a pull-out box is provided in the collection tank. In this invention, after the magnetic plate is removed, the collection tank can collect the adsorbed iron filings and metal impurities. After collecting them, the iron filings and metal impurities can be taken out for secondary utilization after filtering through a pull-out box, which saves costs. The impurities can be recovered by directly taking out the pull-out box. The operation is simple and the collection tank is not prone to blockage. Secondly, in this way, the pull-out box can be taken out after the water in the treatment pool is drained, and excessive water will not be wasted when removing metal impurities, saving resources. When treating high-concentration wastewater, the presence of a large amount of organic matter will cause excessive microbial reproduction inside the biochemical reactor and the material to sink when it is still, which will cause blockage or even failure. Utility Model Content

[0004] In order to make up for the above shortcomings, the utility model provides a wastewater treatment pool, which aims to improve the problem in the existing technology that the presence of a large amount of organic matter leads to excessive microbial growth inside the biochemical reactor and the sinking of matter when it is stationary, thereby causing blockage or even failure.

[0005] In order to achieve the above-mentioned purpose, the utility model adopts the following technical scheme: a wastewater treatment tank, including a pretreatment tank, a protective shell is provided at the top of the pretreatment tank, a base 1 is provided inside the protective shell, the upper end of the base 1 is fixedly connected to a motor 1, the output end of the motor 1 is fixedly connected to a rotating shaft 1, the other end of the rotating shaft 1 is fixedly connected to a bevel gear 1, the middle and upper part of the protective shell is rotatably connected to a rotating shaft 2, the upper end of the rotating shaft 2 is fixedly connected to a bevel gear 2, the bevel gear 1 is meshed with the bevel gear 2, the bottom of the rotating shaft 2 is fixedly connected to a fixed block, the outer wall of the fixed block is fixedly connected to a coarse rotating shaft, the outer wall of the coarse rotating shaft is fixedly connected to a stirring sheet, and a scooping mechanism is provided at the top of the pretreatment tank, and the scooping mechanism is used to scoop out debris accumulated in the wastewater treatment tank.

[0006] Through the above technical solution: during the operation of the wastewater treatment tank, motor 1 outputs power through base 1 in the protective shell to drive rotating shaft 1. The end of rotating shaft 1 is connected to bevel gear 1, which meshes with bevel gear 2 on rotating shaft 2 in the protective shell to realize transmission. A fixed block is fixed at the lower end of rotating shaft 2, and a thick rotating shaft is installed on the outside thereof. A stirring blade is fixed on the thick rotating shaft to make it rotate, ensuring that the sewage in the sewage treatment tank is continuously in a dynamic state to prevent sedimentation, thereby solving the problem of excessive reproduction of microorganisms and static sinking of materials inside the biochemical reactor caused by the presence of a large amount of organic matter, which in turn causes blockage or failure.

[0007] As a further description of the above technical solution:

[0008] The scooping mechanism includes a protection box, which is arranged at the top of the pretreatment tank, and a base 2 is provided at the right end of the protection box, the upper end of the base 2 is fixedly connected to the motor 2, the output end of the motor 2 is fixedly connected to the rotating shaft 3, the outer wall of the rotating shaft 3 is fixedly connected to a plurality of rotating gears, the front and rear sides of the protection box are slidably connected to a plurality of moving plates, the outer side of the moving plate is fixedly connected to a moving rod, the rear end of the moving rod on the front side is fixedly connected to a sawtooth bar, the front end of the moving rod on the rear side is fixedly connected to a fixed rod, the rotating gear is meshed with the sawtooth bar, the bottom end of the sawtooth bar is fixedly connected to the filter box, the fixed rod is fixedly connected to the filter box, the right end of the filter box is slidably connected to a pull tab, the rear end of the pull tab is fixedly connected to a pull rod, the rear side of the pull rod is fixedly connected to a connecting block, and the left end of the connecting block is fixedly connected to a scraper.

[0009] Through the above technical solution: after the wastewater treatment pool completes the treatment, the output end of the motor two drives the rotating shaft three to rotate through the base two in the protection box, two rotating gears are fixed on the outside of the rotating shaft three, and the front and rear parts of the protection box are connected to the moving piece through a sliding connection, a moving rod is fixed on the outside of the moving piece, the front moving rod is fixed with a serrated bar, and the rear moving rod is fixed with a fixed rod, a filter box is fixed under the serrated bar and the fixed rod, and the rotating gear drives the serrated bar to move the filter box vertically, and the right side of the filter box is slidably connected to the pull piece, a pull rod is fixed to the rear side of the pull piece, a connecting block is fixed to the rear side of the pull rod, and a scraper is fixed to the left side of the connecting block, thereby realizing the removal of debris accumulated in the wastewater treatment pool, effectively saving the time and manpower consumed in treating debris in the pool.

[0010] As a further description of the above technical solution:

[0011] The front and rear ends of the top of the pretreatment tank are fixedly connected with a plurality of fixing plates, and the upper ends of the fixing plates are fixedly connected with a staircase frame.

[0012] Through the above technical solution: fixed fixing plates are installed in the top area of ​​the pretreatment tank. These fixing plates are distributed at the front and rear ends of the pretreatment tank. The upper end of the fixing plate ensures that it can withstand the corresponding load and is firmly and reliably connected to the stair frame to ensure the stability and safety of the entire structure.

[0013] As a further description of the above technical solution:

[0014] A plurality of stair sections are fixedly connected to the middle portion of the stair frame, and a handrail is fixedly connected to the upper end of the stair frame.

[0015] Through the above technical solution: the middle area of ​​the stair frame is also fixedly connected to multiple stair sections. These stair sections ensure the stability and safety of the entire stair structure through precise engineering design and solid connection. The upper part of the stair frame is also connected to a safe handrail.

[0016] As a further description of the above technical solution:

[0017] The left and right ends of the stair frame are both fixedly connected with a parking platform, and the bottom of the parking platform is fixedly connected with a plurality of supporting legs.

[0018] Through the above technical solution: the left and right ends of the stair frame are also fixedly connected to two parking platforms, and the bottoms of these parking platforms are firmly fixed to the ground through multiple supporting legs to prevent sliding or movement under different ground conditions, thereby ensuring the safety and stability of the entire structure.

[0019] As a further description of the above technical solution:

[0020] A water trough is provided at the left end of the pretreatment tank, and a plurality of railings are fixedly connected to the interior of the water trough.

[0021] According to the above technical solution: a water trough is provided on the left side of the pretreatment tank, and a plurality of railings are fixedly connected inside the water trough.

[0022] As a further description of the above technical solution:

[0023] The left end of the protective shell is fixedly connected with a hinge, and the front end of the hinge is fixedly connected with a mechanical door.

[0024] Through the above technical solution: the left side of the protective shell is connected to the mechanical door through a hinge, which is convenient for opening for inspection and maintenance.

[0025] As a further description of the above technical solution:

[0026] The left side of the mechanical door is fixedly connected with a support rod, and the left end of the support rod is fixedly connected with a handle.

[0027] According to the above technical solution, the front of the hinge is connected to the support rod, and the left side of the support rod is connected to the handle.

[0028] The utility model has the following beneficial effects:

[0029] 1. In the utility model, the output end of the motor rotates, thereby causing the rotating shaft to drive the bevel gear to rotate, thereby causing the coarse rotating shaft to rotate, and driving the stirring blade to rotate, so that the sewage in the sewage treatment tank is kept in an active state to prevent it from sinking, and solves the problem that the presence of a large amount of organic matter leads to excessive reproduction of microorganisms inside the biochemical reactor and the sinking of substances when it is stationary, which in turn causes blockage or even failure.

[0030] 2. In the utility model, the output end of the motor 2 rotates, thereby causing the rotating shaft 3 to drive the rotating gear to rotate, so that the serrated bar moves the filter box up and down, and then the pull piece is pulled to cause the scraper to scrape the inside of it, thereby realizing the scooping of debris accumulated in the wastewater treatment tank, and solving the problem of wasted time and manpower in treating the debris accumulated in the wastewater treatment tank. BRIEF DESCRIPTION OF THE DRAWINGS

[0031] Figure 1 A three-dimensional diagram of a wastewater treatment pool proposed in the present utility model;

[0032] Figure 2 This is a front view of a wastewater treatment pool proposed by the utility model;

[0033] Figure 3 This is a structural breakdown diagram of a wastewater treatment pool proposed in the utility model;

[0034] Figure 4This is an exploded view of the local structure of a wastewater treatment pool proposed in the utility model;

[0035] Figure 5 This is a disassembled diagram of a scooping mechanism for a wastewater treatment pool proposed in the utility model.

[0036] Legend:

[0037] 1. Pretreatment tank; 2. Retrieving mechanism; 201. Protective box; 202. Base 2; 203. Motor 2; 204. Rotating shaft 3; 205. Rotating gear; 206. Moving piece; 207. Moving rod; 208. Sawtooth bar; 209. Fixed rod; 210. Filter box; 211. Pull tab; 212. Pull rod; 213. Connecting block; 214. Scraper; 3. Fixed piece; 4. Staircase; 5. Stair section; 6. Handrail; 7. Parking platform; 8. Support leg; 9. Water trough; 10. Railing; 11. Hinge; 12. Mechanical door; 13. Support rod; 14. Handle; 15. Protective shell; 16. Base 1; 17. Motor 1; 18. Rotating shaft 1; 19. Bevel gear 1; 20. Rotating shaft 2; 21. Bevel gear 2; 22. Fixed block; 23. Coarse rotating shaft; 24. Stirring piece. DETAILED DESCRIPTION

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

[0039] Reference Figure 3 and Figure 4The utility model provides an embodiment: a wastewater treatment tank, including a pretreatment tank 1, a protective shell 15 is provided at the top of the pretreatment tank 1, a base 16 is provided inside the protective shell 15, the upper end of the base 16 is fixedly connected to a motor 17, the power source of the device, the output end of the motor 17 is fixedly connected to a rotating shaft 18, the other end of the rotating shaft 18 is fixedly connected to a bevel gear 19, the middle and upper part of the protective shell 15 is rotatably connected to a rotating shaft 20, the upper end of the rotating shaft 20 is fixedly connected to a bevel gear 21, and the bevel gear 19 is meshed with the bevel gear 21. The connection makes the transmission smoother. The bottom of the rotating shaft 20 is fixedly connected with a fixed block 22. The outer wall of the fixed block 22 is fixedly connected with a thick rotating shaft 23. The outer wall of the thick rotating shaft 23 is fixedly connected with a stirring piece 24. The top of the pretreatment tank 1 is provided with a scooping mechanism 2, which is used to scoop out debris accumulated in the wastewater treatment tank; the left end of the protective shell 15 is fixedly connected with a hinge 11, and the front end of the hinge 11 is fixedly connected with a mechanical door 12; the left side of the mechanical door 12 is fixedly connected with a support rod 13, and the left end of the support rod 13 is fixedly connected with a handle 14 for inspection and maintenance;

[0040] Specifically, during the operation of the wastewater treatment tank, the base 16 inside the protective shell 15 plays a key role. It supports the motor 17. The output end of the motor 17 transmits power through the rotating shaft 18. The end of the rotating shaft 18 is connected to the bevel gear 19. Inside the protective shell 15, the rotating shaft 20 is connected to the rotating shaft 18, and the bevel gear 21 is fixed to the upper end of the rotating shaft 20. The bevel gear 19 and the bevel gear 21 are engaged with each other through gear transmission, so that the rotating shaft 20 can rotate. A fixed block 22 is fixed to the lower end of the rotating shaft 20, and a coarse rotating shaft 23 is fixed to the outside of the fixed block 22. A stirring blade 24 is installed on the outside of the coarse rotating shaft 23. The rotation of the stirring blade 24 The rotation keeps the sewage in the wastewater treatment tank dynamic, effectively prevents the sedimentation of solid matter in the sewage, and effectively solves the problem of excessive microbial reproduction inside the biochemical reactor and sinking of matter in a static state due to the presence of a large amount of organic matter, thereby avoiding the risk of blockage or even equipment failure; in addition, the left side of the protective shell 15 is connected to the mechanical door 12 through a hinge 11, and the front end of the hinge 11 is fixedly connected to the mechanical door 12, ensuring that the mechanical door 12 can be flexibly opened and closed; the left side of the mechanical door 12 is connected to the handle 14 through a support rod 13, and the left end of the support rod 13 is fixedly connected to the handle 14, so that the operator can easily control the switch of the mechanical door 12 to facilitate maintenance and repair of the equipment.

[0041] Reference Figure 3 and Figure 5The scooping mechanism 2 includes a protective box 201, which is arranged at the top of the pretreatment tank 1. A base 202 is provided at the right end of the protective box 201. The upper end of the base 202 is fixedly connected to a motor 203, which is the power source of the device. The output end of the motor 203 is fixedly connected to a rotating shaft 3 204. The outer wall of the rotating shaft 3 204 is fixedly connected to a plurality of rotating gears 205. The front and rear sides of the protective box 201 are slidably connected to a plurality of moving pieces 206. The outer side of the moving piece 206 is fixedly connected to a moving rod 207. The rear end of the front moving rod 207 is fixedly connected to a sawtooth bar 208. The rear moving rod 207 is fixedly connected to the sawtooth bar 208. The front end is fixedly connected with a fixed rod 209, and the rotating gear 205 is meshed with the sawtooth bar 208 to make the transmission smoother. The bottom end of the sawtooth bar 208 is fixedly connected with a filter box 210, and the fixed rod 209 is fixedly connected to the filter box 210. The right end of the filter box 210 is slidably connected with a pull tab 211, and the rear end of the pull tab 211 is fixedly connected with a pull rod 212. The rear side of the pull rod 212 is fixedly connected with a connecting block 213, and the left end of the connecting block 213 is fixedly connected with a scraper 214; the left end of the pretreatment tank 1 is provided with a water trough 9, and the interior of the water trough 9 is fixedly connected with a plurality of railings 10 for flowing into the next step;

[0042] Specifically, after the wastewater treatment tank completes its treatment process, the base 202 inside the protection box 201 plays a key role. The base 202 supports the motor 203. The output end of the motor transmits power through the rotating shaft 3 204. Two rotating gears 205 are installed on the outside of the rotating shaft 204. These gears are connected to the front and rear sliding mechanisms of the protection box 201, so that the moving piece 206 can move back and forth. A moving rod 207 is fixed on the outside of the moving piece 206, wherein the front moving rod 207 is connected to the sawtooth bar 208, and the rear moving rod 207 is connected to the fixed rod 209. The filter box 210 is fixed below the sawtooth bar 208 and the fixed rod 209. Through the transmission action of the rotating gear 205, the sawtooth bar 208 can drive The filter box 210 moves up and down reciprocatingly, and the right side of the filter box 210 is connected to the pull tab 211 through a sliding mechanism. The rear end of the pull tab 211 is fixed with a pull rod 212, and the rear end of the pull rod 212 is fixed with a connecting block 213. The left side of the connecting block 213 is fixed with a scraper 214, which realizes the effective removal of accumulated debris in the wastewater treatment tank, and significantly reduces the time and labor costs required for processing debris in the wastewater treatment tank; in addition, at the left end of the pretreatment tank 1, a water trough 9 is specially designed, and a plurality of railings 10 are installed inside the water trough 9. These railings 10 help to guide the water flow, thereby improving the efficiency and effect of the entire wastewater treatment system. The model of motor 17 is Y2-200L-4, and the model of motor 2 203 is Y2-200L-4.

[0043] Reference Figure 1 、 Figure 2 and Figure 3, the front and rear ends of the top of the pretreatment tank 1 are fixedly connected with a plurality of fixing plates 3, the upper ends of the fixing plates 3 are fixedly connected with a stair frame 4; the middle part of the stair frame 4 is fixedly connected with a plurality of stair sections 5, and the upper end of the stair frame 4 is fixedly connected with a handrail 6 for protection; the left and right ends of the stair frame 4 are fixedly connected with a parking platform 7, and the bottom of the parking platform 7 is fixedly connected with a plurality of supporting legs 8 for strengthening fixation;

[0044] Specifically, at the top of the pretreatment tank 1, several fixed fixing plates 3 are installed at the front and rear ends. The upper end parts of these fixing plates 3 are firmly connected to the stair frame 4, and the middle area of ​​the stair frame 4 is also fixedly connected to multiple stair sections 5, which together constitute a stable stair structure; in addition, the upper end part of the stair frame 4 is also connected to a safe handrail 6 to ensure the safety of users when going up and down the stairs; the left and right ends of the stair frame 4 are also fixedly connected to two parking platforms 7, and the bottoms of these parking platforms 7 are firmly fixed to the ground through multiple support legs 8 to provide additional stability and support. The entire structure takes into account stability and practicality, ensuring that people at the top of the pretreatment tank 1 can move up and down safely and conveniently.

[0045] Working principle: When the wastewater treatment tank is working, the base 16 provided inside the protective shell 15 drives the rotating shaft 18 through the output end of the motor 17 on it. The other end of the rotating shaft 18 is fixed with a bevel gear 19, and the rotating shaft 20 connected to the protective shell 15 rotates. The bevel gear 21 is fixed on the top of the rotating shaft 20, and the bevel gear 21 is driven by the bevel gear 19. A fixed block 22 is fixed under the rotating shaft 20, and a coarse rotating shaft 23 is fixed outside the fixed block 22. A stirring blade 24 is fixed outside the coarse rotating shaft 23, so that the stirring blade 24 rotates, thereby keeping the sewage in the sewage treatment tank in an active state to prevent it from sinking, and solving the problem that the presence of a large amount of organic matter leads to excessive reproduction of microorganisms inside the biochemical reactor and the sinking of substances when stationary, thereby causing blockage or even failure.

[0046] When the wastewater treatment tank is finished, the output end of the motor 203 on the base 202 set in the protection box 201 drives the rotating shaft 3 204. Two rotating gears 205 are fixed on the outside of the rotating shaft 3 204. The front and back of the protection box 201 are connected to the moving piece 206. The outside of the moving piece 206 is fixed with a moving rod 207. The front moving rod 207 is fixed with a sawtooth bar 208, and the rear moving rod 207 is fixed with a fixed rod 209. The sawtooth bar 208 and the fixed rod 209 are connected. A filter box 210 is fixed at the bottom of 09, and the serrated bar 208 is driven by the rotating gear 205 to move the filter box 210 up and down. The right side of the filter box 210 is connected to the pull tab 211, and a pull rod 212 is fixed behind the pull tab 211, and a connecting block 213 is fixed behind the pull rod 212. A scraper 214 is fixed to the left of the connecting block 213, which realizes the scooping of debris accumulated in the wastewater treatment pool and solves the time and manpower wasted in treating the debris accumulated in the wastewater treatment pool.

[0047] Finally, it should be noted that the above is only a preferred embodiment of the present invention and is not intended to limit the present invention. Although the present invention has been described in detail with reference to the aforementioned embodiments, those skilled in the art can still modify the technical solutions described in the aforementioned embodiments or make equivalent replacements for some of the technical features therein. Any modifications, equivalent replacements, improvements, etc. made within the spirit and principles of the present invention should be included in the scope of protection of the present invention.

Claims

1. A wastewater treatment tank, comprising a pretreatment tank (1), characterized in that: The top of the pretreatment tank (1) is provided with a protective shell (15), the interior of the protective shell (15) is provided with a base 1 (16), the upper end of the base 1 (16) is fixedly connected to a motor 1 (17), the output end of the motor 1 (17) is fixedly connected to a rotating shaft 1 (18), the other end of the rotating shaft 1 (18) is fixedly connected to a bevel gear 1 (19), the middle and upper part of the protective shell (15) is rotatably connected to a rotating shaft 2 (20), the upper end of the rotating shaft 2 (20) is fixedly connected to the rotating shaft 2 (20). A bevel gear 2 (21) is fixedly connected, the bevel gear 1 (19) is meshed with the bevel gear 2 (21), the bottom of the rotating shaft 2 (20) is fixedly connected with a fixed block (22), the outer wall of the fixed block (22) is fixedly connected with a coarse rotating shaft (23), the outer wall of the coarse rotating shaft (23) is fixedly connected with a stirring blade (24), and a scooping mechanism (2) is provided at the top of the pretreatment tank (1), and the scooping mechanism (2) is used to scoop out debris accumulated in the wastewater treatment tank.

2. A wastewater treatment pool according to claim 1, characterized in that: The scooping mechanism (2) comprises a protection box (201), the protection box (201) is arranged at the top of the pretreatment tank (1), a base 2 (202) is arranged at the right end of the protection box (201), the upper end of the base 2 (202) is fixedly connected to a motor 2 (203), the output end of the motor 2 (203) is fixedly connected to a rotating shaft 3 (204), the outer wall of the rotating shaft 3 (204) is fixedly connected to a plurality of rotating gears (205), the front and rear sides of the protection box (201) are slidably connected to a plurality of moving plates (206), the outer sides of the moving plates (206) are fixedly connected to a moving rod (207), the front side of the moving rod (207) is fixedly connected to the outer side of the moving rod (207), and the front side of the moving rod (207) is fixedly connected to the outer side of the moving rod (207). The rear end is fixedly connected to a sawtooth bar (208), the front end of the rear movable rod (207) is fixedly connected to a fixed rod (209), the rotating gear (205) is meshedly connected to the sawtooth bar (208), the bottom end of the sawtooth bar (208) is fixedly connected to a filter box (210), the fixed rod (209) is fixedly connected to the filter box (210), the right end of the filter box (210) is slidably connected to a pull tab (211), the rear end of the pull tab (211) is fixedly connected to a pull rod (212), the rear side of the pull rod (212) is fixedly connected to a connecting block (213), and the left end of the connecting block (213) is fixedly connected to a scraper (214).

3. A wastewater treatment pool according to claim 1, characterized in that: A plurality of fixing plates (3) are fixedly connected to the front and rear ends of the top of the pretreatment tank (1), and a staircase frame (4) is fixedly connected to the upper ends of the fixing plates (3).

4. A wastewater treatment pool according to claim 3, characterized in that: A plurality of stair sections (5) are fixedly connected to the middle portion of the stair frame (4), and a handrail (6) is fixedly connected to the upper end of the stair frame (4).

5. A wastewater treatment pool according to claim 4, characterized in that: The left and right ends of the stair frame (4) are both fixedly connected to a parking platform (7), and the bottom of the parking platform (7) is fixedly connected to a plurality of supporting legs (8).

6. A wastewater treatment pool according to claim 1, characterized in that: A water trough (9) is provided at the left end of the pretreatment tank (1), and a plurality of railings (10) are fixedly connected to the interior of the water trough (9).

7. A wastewater treatment pool according to claim 1, characterized in that: The left end of the protective shell (15) is fixedly connected to a hinge (11), and the front end of the hinge (11) is fixedly connected to a mechanical door (12).

8. A wastewater treatment pool according to claim 7, characterized in that: A support rod (13) is fixedly connected to the left side of the mechanical door (12), and a handle (14) is fixedly connected to the left end of the support rod (13).

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