A sewage treatment device for repairing endogenous pollution in an artificial wetland
Patent Information
- Application Number
- CN202522634890.8
- Authority / Receiving Office
- CN · China
- Patent Type
- Utility models(China)
- Current Assignee / Owner
- Filing Date
- 2025-12-12
- Publication Date
- 2026-10-27
- Estimated Expiration
- 2035-12-12
Smart Images
Figure CN224902124U_ABST
Abstract
Description
Technical Field
[0001] This utility model belongs to the field of wastewater treatment technology, and in particular relates to a wastewater treatment device for remediating endogenous pollution in constructed wetlands. Background Technology
[0002] Traditional constructed wetlands mainly treat external wastewater (exogenous pollution), but after years of operation, they accumulate a large amount of pollutants (such as organic matter, nitrogen, phosphorus, heavy metals, etc.). These accumulated pollutants constitute endogenous pollution. When the environment changes (such as temperature, pH, hydraulic shock), these pollutants will be released back into the water body, causing secondary pollution and leading to the failure of the wetland treatment function.
[0003] The traditional approach to treating endogenous pollution in constructed wetlands involves using aeration to deliver oxygen to the deeper layers of the wetland, adding chemicals to address phosphorus and heavy metal saturation, and finally adding microbial agents to the collection tank to degrade pollutants in the water, resulting in suspended solids that float on the surface. Workers then use scoops to remove these suspended solids. However, when conducting large-scale continuous treatment operations, manual scooping not only increases the workload of workers but also takes a long time to complete a single scooping operation. Therefore, this method not only reduces the overall treatment efficiency but is also difficult to adapt to large-scale continuous operations. Utility Model Content
[0004] The purpose of this invention is to provide a wastewater treatment device for remediating endogenous pollution in constructed wetlands. By incorporating a retrieval mechanism, specifically a bidirectional screw rotating clockwise to move a movable rod to the left, retrieval the suspended solids on the water surface through a retrieval box. The movable rod then enters a left inclined trough, causing the retrieval box to rise and detach from the water surface. Subsequently, the movable rod enters an extension trough, where a discharge rod pushes the retrieval box to rotate counterclockwise, emptying its suspended solids into a collection box. Afterwards, a movable block moves the retrieval box to the right into an upper horizontal trough, and then returns it to the lower horizontal trough via a right inclined trough, completing the retrieval operation. This structure can retrieve suspended solids from the water surface and automatically empty them into a collection box, improving treatment efficiency, reducing the workload of workers, and quickly completing the retrieval operation. It solves the problem that most existing wastewater treatment devices use microbial agents to coagulate pollutants in the water into suspended solids that float on the surface, requiring manual retrieval. However, this method has low treatment efficiency, significantly increases the workload of workers during large-scale continuous operations, and is time-consuming, making it unsuitable for large-scale continuous operations.
[0005] To solve the above-mentioned technical problems, this utility model is achieved through the following technical solution:
[0006] This utility model relates to a wastewater treatment device for remediating endogenous pollution in constructed wetlands. It includes a collection tank with a sludge discharge pipe fixedly connected to its front. Two fixed frames are fixedly connected to the top of the collection tank. A retrieval box is installed inside the collection tank. The device also includes a retrieval mechanism located at the top of the collection tank. This mechanism is used to retrieve suspended solids from the water. The retrieval mechanism includes a moving rod. A fixed plate is fixedly connected to the back of the fixed frames located on the rear side. A fixed block is fixedly connected to the front of the fixed plate. A lower horizontal groove is provided between the fixed frames and the fixed block located on the rear side. The system includes a left inclined groove, an upper horizontal groove, and a right inclined groove. The outer surface of the moving rod slides and limits the movement with the inner walls of the lower horizontal groove, left inclined groove, upper horizontal groove, and right inclined groove, respectively. An anti-disturbance mechanism is located inside the fixed frame to prevent the retrieval box from disturbing the floating suspended layer. The sludge discharge pipe is interconnected with the interior of the water collection tank. The lower and upper horizontal grooves are parallel to each other, as are the left and right inclined grooves. The outer surface of the moving rod contacts the inner side of the fixed frame. The left side of the water collection tank is inclined so that the retrieval box will not collide with the left side of the water collection tank when the moving rod moves in the left inclined groove.
[0007] Furthermore, a valve is installed on the outer surface of the sludge discharge pipe, an inlet pipe is fixedly connected to the right side of the top of the water collection tank, an outlet pipe is fixedly connected to the left side of the water collection tank, a filter screen is installed on the right side of the outlet pipe, a U-shaped frame is fixedly connected to the left side of the water collection tank, and a collection box is inserted inside the U-shaped frame; the outlet pipe is interconnected with the inside of the water collection tank.
[0008] Furthermore, a connecting block is fixedly connected to one side of the two fixed frames that are close to each other, and a discharge rod is fixedly connected to the right side of the connecting block. An extension groove is provided inside the fixed frame, and the outer surface of the moving rod slides and limits the inner wall of the extension groove. A limit block is fixedly connected to the outer surface of the moving rod.
[0009] Furthermore, the anti-disruption mechanism includes a hinge plate, a mounting groove is provided on the left side of the fixing block, and a pin is fixedly connected to the right side of the hinge plate. The pin is hinged to the inner wall of the mounting groove. The pin passes through the interior of the fixing block and extends to the outside. An inclined surface is provided on the left side of the hinge plate.
[0010] Furthermore, both the water collection tank and the U-shaped frame are fixedly connected to a fixed base on their front sides. A bidirectional lead screw is rotatably connected inside the two fixed bases. A motor is fixedly connected to the left side of the fixed base on the left side. The right output end of the motor is fixedly connected to the left end of the bidirectional lead screw via a coupling. A moving block is slidably fitted onto the outer surface of the bidirectional lead screw. Two limiting grooves are formed inside the moving block, and the outer surface of the limiting block slidably fits into the inner walls of the two limiting grooves. The two fixed bases are used to support and install the bidirectional lead screw. When the moving rod moves up and down, the limiting block slides in the two limiting grooves, and the fixed base and the limiting grooves work together to prevent the moving rod from rotating.
[0011] Furthermore, a rotating ring is rotatably connected to the outer surface of the moving rod, and a connecting plate and an inclined plate are fixedly connected to the outer surface of the rotating ring. The bottom of the connecting plate is fixedly connected to the top of the retrieval box. Two fixed rods are fixedly connected to the top of the outer surface of the moving rod, and a horizontal plate is fixedly connected to the side of the two fixed rods that are close to each other. A spring is fixedly connected to the left side of the horizontal plate, and the left end of the spring is fixedly connected to the right side of the inclined plate. The two fixed rods are used to limit the rotating ring. The front and back of the retrieval box are in contact with the back and front of the inner wall of the water collection pool, respectively. The contact between the front and back of the retrieval box and the back and front of the inner wall of the water collection pool prevents the moving rod from moving to the front or back, thereby ensuring that the moving block moves smoothly.
[0012] Furthermore, a mounting tube is fixedly connected to the front of the fixing block, a spiral spring is fixedly connected to the inner wall of the mounting tube, and the other end of the spiral spring is fixedly connected to the outer surface of the pin.
[0013] This utility model has the following beneficial effects:
[0014] 1. This utility model features a retrieval mechanism. Specifically, a bidirectional lead screw rotates clockwise, causing a moving rod to move to the left. The retrieval box scoops up suspended matter from the water surface. Then, the moving rod enters the left inclined groove, causing the retrieval box to rise and detach from the water surface. Subsequently, the moving rod enters the extension groove, and the unloading rod pushes the retrieval box to rotate counterclockwise, emptying its suspended matter into the collection box. Afterward, a moving block moves the retrieval box to the right into the upper horizontal groove, and then returns to the lower horizontal groove via the right inclined groove, completing the retrieval operation. This structure can retrieve suspended matter from the water surface and automatically empty it into the collection box, improving processing efficiency, reducing the workload of workers, and quickly completing the retrieval operation.
[0015] 2. This utility model incorporates an anti-disturbance mechanism. Specifically, when the moving rod enters the extension slot from the left inclined slot, it pushes the hinge plate to rotate clockwise around the pin axis. After the moving rod enters the extension slot, the spiral spring pushes the hinge plate to reset. Then, when the moving rod enters the upper horizontal slot from the extension slot, the hinge plate supports the moving rod, allowing it to smoothly enter the upper horizontal slot. This also ensures that the retrieval box moves away from the water surface when it moves to the right, preventing disturbance of suspended objects on the water surface. This allows the next retrieval operation to proceed smoothly without waiting for the disturbed suspended objects to re-aggregate before retrieval, greatly improving processing efficiency.
[0016] Of course, any product implementing this utility model does not necessarily need to achieve all of the advantages described above at the same time. Attached Figure Description
[0017] To more clearly illustrate the technical solutions of the embodiments of this utility model, the accompanying drawings used in the description of the embodiments 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.
[0018] Figure 1 This is a schematic diagram of the overall structure of this utility model;
[0019] Figure 2 This is a schematic diagram of the fixing base structure of this utility model;
[0020] Figure 3 This is a schematic diagram of the overall structure of the retrieval mechanism of this utility model;
[0021] Figure 4 This is a schematic diagram of the limiting groove structure of this utility model;
[0022] Figure 5 This is a schematic diagram of the spring structure of this utility model;
[0023] Figure 6 This is a schematic diagram of the overall structure of the anti-disruption mechanism of this utility model.
[0024] The attached diagram lists the components represented by each number as follows:
[0025] 1. Water collection tank; 11. Sludge discharge pipe; 111. Valve; 12. Water inlet pipe; 13. Water outlet pipe; 14. U-shaped frame; 141. Collection box; 2. Retrieving mechanism; 21. Fixing frame; 211. Extension trough; 22. Fixing block; 221. Lower horizontal trough; 222. Left inclined trough; 223. Upper horizontal trough; 224. Right inclined trough; 23. Fixing plate; 24. Connecting block; 241. Unloading rod; 25. Moving rod; 2 51. Limiting block; 26. Fixed seat; 261. Two-way lead screw; 262. Motor; 27. Moving block; 271. Limiting groove; 28. Rotary ring; 281. Connecting plate; 282. Retrieval box; 283. Inclined plate; 29. Fixed rod; 291. Horizontal plate; 292. Spring; 3. Anti-disturbance mechanism; 31. Mounting groove; 311. Hinge plate; 312. Pin; 32. Mounting tube; 321. Snail spring. Detailed Implementation
[0026] 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 skilled in the art without creative effort are within the protection scope of the present utility model.
[0027] Please see Figures 1-6As shown, this utility model is a wastewater treatment device for remediating endogenous pollution in constructed wetlands. It includes a collection tank 1, with a sludge discharge pipe 11 fixedly connected to the front of the collection tank 1. Two fixed frames 21 are fixedly connected to the top of the collection tank 1. A retrieval box 282 is installed inside the collection tank 1. It also includes a retrieval mechanism 2, located at the top of the collection tank 1. The retrieval mechanism 2 is used to retrieve suspended solids in the water. The retrieval mechanism 2 includes a moving rod 25. A fixed plate 23 is fixedly connected to the back of the fixed frame 21 located on the back side. A fixed block 22 is fixedly connected to the front of the fixed plate 23. The fixed frame 21 and fixed block 22 located on the back side... The frame 21 is provided with a lower horizontal groove 221, a left inclined groove 222, an upper horizontal groove 223, and a right inclined groove 224. The outer surface of the moving rod 25 is respectively slidably limited to the inner wall of the lower horizontal groove 221, the left inclined groove 222, the upper horizontal groove 223, and the right inclined groove 224. An anti-disturbance mechanism 3 is provided on the inner side of the fixed frame 21 to prevent the retrieval box 282 from disturbing the floating suspended layer. The mud discharge pipe 11 is connected to the inside of the water collection tank 1. The lower horizontal groove 221 and the upper horizontal groove 223 are parallel to each other, the left inclined groove 222 and the right inclined groove 224 are parallel to each other, and the outer surface of the moving rod 25 is in contact with the inner side of the fixed frame 21. A valve 111 is installed on the outer surface of the sludge discharge pipe 11. An inlet pipe 12 is fixedly connected to the right side of the top of the water collection tank 1. An outlet pipe 13 is fixedly connected to the left side of the water collection tank 1. A filter screen is installed on the right side of the outlet pipe 13. A U-shaped frame 14 is fixedly connected to the left side of the water collection tank 1. A collection box 141 is inserted into the U-shaped frame 14. The outlet pipe 13 is interconnected with the inside of the water collection tank 1. A connecting block 24 is fixedly connected to one side of the two fixed frames 21 that are close to each other. A discharge rod 241 is fixedly connected to the right side of the connecting block 24. An extension groove 211 is provided inside the fixed frame 21. The outer surface of the moving rod 25 slides and limits the movement with the inner wall of the extension groove 211. A limit block 251 is fixedly connected to the outer surface of the moving rod 25. The anti-disruption mechanism 3 includes a hinge plate 311. A mounting groove 31 is provided on the left side of the fixing block 22. A pin 312 is fixedly connected to the right side of the hinge plate 311, and the pin 312 is hinged to the inner wall of the mounting groove 31. The pin 312 passes through the interior of the fixing block 22 and extends to the outside. An inclined surface is provided on the left side of the hinge plate 311. Fixing seats 26 are fixedly connected to the front of both the water collection tank 1 and the U-shaped frame 14. A bidirectional lead screw 261 is rotatably connected inside the two fixing seats 26. A motor 262 is fixedly connected to the left side of the left fixing seat 26. The right output end of the motor 262 is fixedly connected to the left end of the bidirectional lead screw 261 via a coupling. A moving block 27 is slidably limited to the outer surface of the bidirectional lead screw 261. Two limiting grooves 271 are provided inside the moving block 27. The outer surface of the limiting block 251 slidably limits the movement of the two limiting grooves 271. The two fixing seats 26 are used to support and install the bidirectional lead screw 261.A rotating ring 28 is rotatably connected to the outer surface of the moving rod 25. A connecting plate 281 and an inclined plate 283 are fixedly connected to the outer surface of the rotating ring 28. The bottom of the connecting plate 281 is fixedly connected to the top of the retrieval box 282. Two fixed rods 29 are fixedly connected to the top of the outer surface of the moving rod 25. A horizontal plate 291 is fixedly connected to the side of the two fixed rods 29 that are close to each other. A spring 292 is fixedly connected to the left side of the horizontal plate 291. The left end of the spring 292 is fixedly connected to the right side of the inclined plate 283. The bidirectional lead screw 261 rotates clockwise, causing the moving rod 25 to move to the left. It retrieves suspended objects on the water surface through the retrieval box 282 and then enters the left inclined groove 222, causing the retrieval box 282 to move upward and detach. The material is removed from the water surface. Then, the moving rod 25 enters the extension trough 211, and the unloading rod 241 pushes the retrieval box 282 to rotate counterclockwise, pouring its suspended matter into the collection box 141. After that, the moving block 27 drives the retrieval box 282 to move to the right into the upper horizontal trough 223, and then returns to the lower horizontal trough 221 through the right inclined trough 224, completing the retrieval operation. This structure can retrieve suspended matter on the water surface and automatically pour it into the collection box 141, which not only improves the processing efficiency and reduces the workload of the staff, but also allows the retrieval operation to be completed quickly. The two fixed rods 29 are used to limit the rotation ring 28. The front and back of the retrieval box 282 are in contact with the back and front of the inner wall of the water collection pool 1, respectively.
[0028] The mounting tube 32 is fixedly connected to the front of the fixing block 22. A spiral spring 321 is fixedly connected to the inner wall of the mounting tube 32. The other end of the spiral spring 321 is fixedly connected to the outer surface of the pin 312. When the moving rod 25 enters the extension groove 211 from the left inclined groove 222, it will push the hinge plate 311 to rotate clockwise around the pin 312. After the moving rod 25 enters the extension groove 211, the spiral spring 321 will push the hinge plate 311 to reset. Then, when the moving rod 25 enters the upper horizontal groove 223 from the extension groove 211, the hinge plate 311 will support the moving rod 25, so that it can smoothly enter the upper horizontal groove 223 and move the retrieval box 282 away from the water surface when it moves to the right, so as not to disturb the suspended objects on the water surface. This allows the next retrieval operation to be carried out smoothly without waiting for the disturbed suspended objects to re-aggregate before retrieval, which greatly improves the processing efficiency.
[0029] A specific application of this embodiment is as follows: When sewage is discharged into the collection tank 1 through the inlet pipe 12, special microorganisms are added to the water. After these suspended solids float to the surface and form a suspended layer, the sludge in the water sinks to the bottom of the inner wall of the collection tank 1 due to its own gravity. The floating suspended layer is blocked by the filter screen on the right side of the outlet pipe 13, so that the treated water flows back into the artificial wetland through the outlet pipe 13. Then, the motor 262 is started to drive the bidirectional lead screw 261 to rotate clockwise, so that the moving block 27 drives the moving rod 25 to move to the left. During this process, the moving rod 25 drives the retrieval box 282 to move to the left through the rotating ring 28 and the connecting plate 281, retrieval the suspended layer on the water surface into its own interior, while the water flows out through the filter hole on the right side of the retrieval box 282. When the moving rod 25 moves to the left limit, it will enter the left inclined groove 222. At this time, the retrieval box 282 will move upward with the moving rod 25. When the moving rod 25 moves to the top of the left inclined groove 222, the connecting block 24 will push the hinge plate 311 to rotate clockwise around the pin 312. At this time, the spiral spring 321 is compressed. Then the moving block 27 drives the moving rod 25 to continue to move to the left and enter the extension groove 211. The retrieval box 282 moves along with it and is now located at the top of the collection box 141. At this time, the connecting block 24 no longer pushes the hinge plate 311. The spiral spring 321 pushes the hinge plate 311 to rotate counterclockwise to reset, so that the left side of the hinge plate 311 contacts the inside of the fixing frame 21 again. At the same time, the moving rod 25 continues to move to the left. When the right side of the unloading rod 241 contacts the left side of the connecting plate 281, the unloading rod 241 will push the connecting plate 281, so that the retrieval box 282 rotates counterclockwise around the moving rod 25, pouring the suspended matter inside into the collection box 141. During this process, the inclined plate 283 will stretch the spring 292.
[0030] Subsequently, after the moving block 27 moves to its left limit, it will drive the moving rod 25 to move to the right. At this time, the connecting plate 281 loses its push, and the spring 292 pulls the inclined plate 283 back to its original position. During the rightward movement of the moving rod 25, its outer surface will contact the top of the hinge plate 311 and enter the upper horizontal groove 223. During this process, the bottom of the retrieval box 282 is higher than the water surface, so it will not disturb the suspended layer. When the moving rod 25 moves to its right limit, it will enter the right inclined groove 224. During this process, the retrieval box 282 will slowly move down into the water surface. After moving to the bottom of the right inclined channel 224, the moving block 27 has moved to the right limit. Then, the double-acting screw 261 drives the moving block 27 and the moving rod 25 to move to the left together. At this point, one retrieval process is completed. Repeating the operation multiple times can retrieve most of the suspended matter on the water surface. Afterward, the staff can simply retrieve the remaining small amount of residual suspended matter. After the operation is completed, open the valve 111 and use a high-pressure water gun to discharge the sludge at the bottom of the inner wall of the collection tank 1 through the sludge discharge pipe 11. Then, the collection box 141 can be pulled out, the suspended matter in the box can be emptied, and then it can be reset and put back.
[0031] It should be noted that the control of motor 262 in this application can all be achieved by using a program set in the control panel and inputting relevant parameters as needed for automated control. This control method can be set using existing technologies, such as PLC.
[0032] In the description of this specification, references to terms such as "an embodiment," "example," "specific example," etc., indicate that a specific feature, structure, material, or characteristic described in connection with that embodiment or example is included in at least one embodiment or example of the present invention. In this specification, the illustrative expressions of the above terms do not necessarily refer to the same embodiment or example. Furthermore, the specific features, structures, materials, or characteristics described may be combined in any suitable manner in one or more embodiments or examples.
[0033] The preferred embodiments of this utility model disclosed above are merely illustrative of the present utility model. These preferred embodiments do not exhaustively describe all details, nor do they limit the present utility model to the specific implementations described. Clearly, many modifications and variations can be made based on the content of this specification. This specification selects and specifically describes these embodiments to better explain the principles and practical applications of the present utility model, thereby enabling those skilled in the art to better understand and utilize it. The present utility model is limited only by the claims and their full scope and equivalents.
Claims
1. A wastewater treatment device for remediating endogenous pollution in constructed wetlands, comprising a collection tank (1), a sludge discharge pipe (11) fixedly connected to the front of the collection tank (1), two fixing frames (21) fixedly connected to the top of the collection tank (1), and a retrieval box (282) provided inside the collection tank (1), characterized in that, Also includes: A retrieval mechanism (2) is installed at the top of the water collection tank (1). The retrieval mechanism (2) is used to retrieve suspended solids in the water. The retrieval mechanism (2) includes a moving rod (25). A fixing plate (23) is fixedly connected to the back of the fixing frame (21) located on the back side. A fixing block (22) is fixedly connected to the front of the fixing plate (23). A lower horizontal groove (221), a left inclined groove (222), an upper horizontal groove (223), and a right inclined groove (224) are provided between the fixing frame (21) and the fixing block (22) located on the back side. The outer surface of the moving rod (25) slides and limits the inner wall of the lower horizontal groove (221), the left inclined groove (222), the upper horizontal groove (223), and the right inclined groove (224), respectively. Anti-disturbance mechanism (3), which is located inside the fixed frame (21), is used to prevent the retrieval box (282) from disturbing the floating suspension layer; The sludge discharge pipe (11) is connected to the inside of the water collection tank (1), the lower horizontal groove (221) and the upper horizontal groove (223) are parallel to each other, the left inclined groove (222) and the right inclined groove (224) are parallel to each other, and the outer surface of the moving rod (25) is in contact with the inner side of the fixed frame (21).
2. The wastewater treatment device for remediating endogenous pollution in constructed wetlands according to claim 1, characterized in that, A valve (111) is installed on the outer surface of the sludge discharge pipe (11), an inlet pipe (12) is fixedly connected to the right side of the top of the water collection tank (1), an outlet pipe (13) is fixedly connected to the left side of the water collection tank (1), a filter screen is installed on the right side of the outlet pipe (13), a U-shaped frame (14) is fixedly connected to the left side of the water collection tank (1), and a collection box (141) is inserted inside the U-shaped frame (14). The water outlet pipe (13) is internally connected to the water collection tank (1).
3. The wastewater treatment device for remediating endogenous pollution in constructed wetlands according to claim 1, characterized in that, A connecting block (24) is fixedly connected to one side of the two fixed frames (21) that are close to each other. A discharge rod (241) is fixedly connected to the right side of the connecting block (24). An extension groove (211) is provided inside the fixed frame (21). The outer surface of the moving rod (25) is slidably limited to the inner wall of the extension groove (211). A limit block (251) is fixedly connected to the outer surface of the moving rod (25).
4. A wastewater treatment device for remediating endogenous pollution in constructed wetlands according to claim 1, characterized in that, The anti-disruption mechanism (3) includes a hinge plate (311), and the left side of the fixing block (22) is provided with an installation groove (31). The right side of the hinge plate (311) is fixedly connected with a pin (312), and the pin (312) is hinged to the inner wall of the installation groove (31). The pin (312) passes through the interior of the fixing block (22) and extends to the outside, and the left side of the hinge plate (311) is provided with an inclined surface.
5. A wastewater treatment device for remediating endogenous pollution in constructed wetlands according to claim 3, characterized in that, The front of the water collection tank (1) and the U-shaped frame (14) are both fixedly connected to a fixed seat (26). The two fixed seats (26) are rotatably connected to a double-acting screw (261). The left side of the fixed seat (26) on the left side is fixedly connected to a motor (262). The right output end of the motor (262) is fixedly connected to the left end of the double-acting screw (261) through a coupling. The outer surface of the double-acting screw (261) is slidably limited by a moving block (27). The moving block (27) has two limiting grooves (271) inside. The outer surface of the limiting block (251) is slidably limited by the inner wall of the two limiting grooves (271). The two mounting bases (26) are used to support and mount the bidirectional lead screw (261).
6. A wastewater treatment device for remediating endogenous pollution in constructed wetlands according to claim 5, characterized in that, The outer surface of the moving rod (25) is rotatably connected to a rotating ring (28). The outer surface of the rotating ring (28) is fixedly connected to a connecting plate (281) and an inclined plate (283). The bottom of the connecting plate (281) is fixedly connected to the top of the retrieval box (282). The top of the outer surface of the moving rod (25) is fixedly connected to two fixed rods (29). A horizontal plate (291) is fixedly connected to the side of the two fixed rods (29) that are close to each other. A spring (292) is fixedly connected to the left side of the horizontal plate (291). The left end of the spring (292) is fixedly connected to the right side of the inclined plate (283). Among them, the two fixing rods (29) are used to limit the rotation ring (28), and the front and back of the retrieval box (282) are in contact with the back and front of the inner wall of the water collection pool (1), respectively.
7. A wastewater treatment device for remediating endogenous pollution in constructed wetlands according to claim 4, characterized in that, The mounting block (22) is fixedly connected to the front of the mounting tube (32), and a spiral spring (321) is fixedly connected to the inner wall of the mounting tube (32). The other end of the spiral spring (321) is fixedly connected to the outer surface of the pin (312).