Precipitation mechanism and sewage treatment device

Abstract

The invention discloses a sedimentation mechanism and a sewage treatment device, and relates to the technical field of sewage treatment.The sedimentation mechanism comprises a sedimentation tank main body, the sedimentation tank main body is provided with a water inlet runner, a water outlet runner, a sludge discharge pipeline and a sludge return pipeline in a communicating mode, and a sludge scraping mechanism, a rotary driving mechanism and a lifting device are arranged in the sedimentation tank main body; the mud scraping angle of the vertical mud scraping mechanism is adjusted through the first angle adjusting structure, and the mud scraping angle of the vertical mud scraping mechanism is adjusted along with the mud scraping angle adjustment of the vertical mud scraping mechanism under the action of the elastic switching structure. The first vertical scraper and the second vertical scraper are automatically switched to scrape sludge on the tank wall of the sedimentation tank main body, and the scrapers are switched according to sludge with different thicknesses, so that the working time of a motor for bearing larger torque is shortened, and the working life of the motor is prolonged; and the transverse sludge scraping mechanism spirally scrapes sludge at the bottom of the sedimentation tank into a sludge discharge pipeline at the bottom of the sedimentation tank main body.

Description

Technical Field

[0001] The present invention relates to the technical field of sewage treatment, and particularly relates to a sedimentation mechanism and a sewage treatment device. Background Art

[0002] In recent years, with the rapid development of industry, the problem of sewage pollution has become increasingly serious. At present, in the biochemical process of sewage treatment, the devices adopted include an aerobic biological reaction device and a sedimentation separation device; moreover, the aerobic biological reaction device and the sedimentation separation device are separately arranged; A sludge scraper is a device used in a sedimentation separation tank, mainly used for treating sludge in a sedimentation tank in a municipal sewage treatment plant, removing the sludge settled at the bottom of the tank and the sticky sludge on the tank wall. Generally, the sludge scraper is driven by a driving device to rotate around the center of the sedimentation tank. After the sludge water is sedimented in the sedimentation tank, the supernatant is discharged from the overflow weir plate. The sludge deposited at the bottom of the tank slowly flows along the bottom of the tank towards the central sludge collecting tank under the push of the scraper and is discharged through the sludge discharge pipe; At present, the existing sludge scraping mechanisms on the market are mainly used to scrape the sludge at the bottom of the sedimentation tank, and cannot achieve a good scraping effect on the sticky sludge on the wall of the sludge tank. The degree of adhesion of the sludge on the wall and the scraping surface of the scraper determine the difficulty of scraping. Currently, the general sludge scraper only uses a group of motors to drive the rotation of the rotating shaft and the scraper. The structure of the scraper causes the motor to bear a large torque to scrape the sludge away from the bottom side wall of the tank body. Working at a large torque for a long time is likely to cause the motor to burn out. Summary of the Invention

[0003] Aiming at the technical defects in the background art, the present invention proposes a sedimentation mechanism and a sewage treatment device, which solve the above technical problems and meet the actual needs. The specific technical solutions are as follows: A sedimentation mechanism includes a sedimentation tank main body, and the sedimentation tank main body is communicated with a water inlet channel, a water outlet channel, a sludge discharge pipeline and a sludge return pipeline. A sludge scraping mechanism, a rotation driving mechanism, a lifting device, and a support main body connecting the rotation driving mechanism and the sludge scraping mechanism are arranged in the sedimentation tank main body; The sludge scraping mechanism includes a vertical sludge scraping mechanism and a plurality of horizontal sludge scraping mechanisms. The vertical sludge scraping mechanism is arranged at both ends of the support main body. A first angle adjustment structure is arranged between the vertical sludge scraping mechanism and the support main body. The horizontal sludge scraping mechanisms are arranged at equal intervals along the length direction of the support main body. A second angle adjustment structure is arranged between the horizontal sludge scraping mechanism and the support main body; The vertical sludge scraping mechanism includes a first sludge scraping support connected to the support main body, a first fixed clamp arranged at the end of the first sludge scraping support, and a first vertical scraper and a second vertical scraper. A elastic force switching structure is arranged between the first vertical scraper and the second vertical scraper and the first fixed clamp.

[0004] As an improvement of the above solution, a working gallery bridge is provided above the main body of the sedimentation tank. A lifting device is provided in the middle of the working gallery bridge. The output end of the lifting device is connected to the main body of the support. The output end of the lifting device passes through along the thickness direction of the working gallery bridge and extends vertically downward.

[0005] As an improvement of the above solution, a first angle adjustment structure connected to the first sludge scraping support is provided at the end of the main body of the support. The first angle adjustment structure includes a first driving motor, a driving shaft and a bearing support. One end of the driving shaft is connected to the first driving motor, and the other end is connected to the vertical sludge scraping mechanism. The bearing support is horizontally arranged on the main body of the support, and the first driving motor is arranged on the bearing support with its output end facing the vertical sludge scraping mechanism.

[0006] As an improvement of the above solution, a first installation groove and a second installation groove are provided in the first fixing clamp. The first vertical scraper and the second vertical scraper are respectively arranged in the first installation groove and the second installation groove; The front end face of the first vertical scraper is an arc-shaped cutter head, and the front end face of the second vertical scraper is a strip-shaped cutter head. The elastic switching structure is arranged in the first installation groove and the second installation groove.

[0007] As an improvement of the above solution, the elastic switching structure includes a first circular connection groove arranged at the bottom of the first installation groove, a first spring arranged in the first circular connection groove, and a first connecting rod inserted into the first spring; One end of the first connecting rod is fixedly connected to the back of the first vertical scraper, and the other end extends into the first circular connection groove.

[0008] As an improvement of the above solution, the elastic switching structure further includes a second circular connection groove arranged at the bottom of the second installation groove, a second spring arranged in the second circular connection groove, and a second connecting rod inserted into the second spring; One end of the second connecting rod is fixedly connected to the back of the second vertical scraper, and the other end extends into the second circular connection groove.

[0009] As an improvement of the above solution, the transverse sludge scraping mechanism includes a second sludge scraping support connected to the main body of the support, a second fixing clamp arranged at the end of the second sludge scraping support, and a transverse scraper. An elastic compensation structure is arranged between the transverse scraper and the second fixing clamp; The second fixed fixture is provided with a third installation groove. The elastic compensation structure includes a third circular connection groove arranged at the bottom of the third installation groove, a third spring arranged in the third circular connection groove, and a third connecting rod penetrating through the third spring. The third connecting rod is fixed to the back of the transverse scraper.

[0010] As an improvement of the above solution, the end of the support main body is provided with a second angle adjustment structure connected to the second sludge scraping support. The second angle adjustment structure includes a second driving motor and a rack. The end of the second driving motor is connected to the side of the rack to drive the linear movement of the rack. The end of the second sludge scraping support is provided with a gear adapted to the shape of the rack.

[0011] As an improvement of the above solution, the output end of the lifting device is connected with a lifting base. The rotary driving mechanism is arranged in the lifting base. The rotary driving mechanism includes a rotary driving motor and a rotary shaft. The output end of the rotary driving motor is arranged downward in the lifting base.

[0012] A sewage treatment device includes an aerobic biological reaction tank. The aerobic biological reaction tank is connected with the sedimentation tank main body through an influent flow channel. The output end of the sludge return pipeline is communicated with the aerobic biological reaction tank.

[0013] The beneficial effects of the present invention are as follows: The first angle adjustment structure adjusts the sludge scraping angle of the vertical sludge scraping mechanism. Under the action of the elastic force switching structure, as the sludge scraping angle of the vertical sludge scraping mechanism is adjusted, the first vertical scraper and the second vertical scraper are switched to scrape the sludge on the pool wall of the sedimentation tank main body. In the case where the sludge is easy to scrape, the vertical scrapers are switched to reduce the working time of the motor under a large torque and increase the working life of the motor. The second angle adjustment structure adjusts the angle of the transverse sludge scraping mechanism, so that the transverse sludge scraping mechanism scrapes the sludge at the bottom of the pool in a spiral shape into the sludge discharge pipeline at the bottom of the sedimentation tank main body. Description of the Drawings

[0014] Figure 1 It is a schematic structural diagram of the sedimentation tank main body of the present invention.

[0015] Figure 2 It is a schematic connection structure diagram of the sedimentation tank main body and the aerobic biological reaction tank of the present invention.

[0016] Figure 3 It is a schematic structural diagram of the support main body of the present invention.

[0017] Figure 4 It is a schematic connection structure diagram of the second angle adjustment structure and the transverse sludge scraping mechanism of the present invention.

[0018] Figure 5Schematic structural diagram of the lifting base of the present invention.

[0019] Figure 6 Schematic internal structure diagram of the horizontal sludge scraping mechanism of the present invention.

[0020] Figure 7 Schematic internal structure diagram of the vertical sludge scraping mechanism of the present invention.

[0021] Wherein: sedimentation tank main body 1, influent channel 11, effluent channel 12, sludge discharge pipe 13, sludge return pipe 14, working gallery bridge 15, vertical sludge scraping mechanism 2, first sludge scraping bracket 21, first fixing fixture 22, first installation groove 221, second installation groove 222, first circular connection groove 223, second circular connection groove 224, first spring 225, second spring 226, first connecting rod 23, second connecting rod 24, first vertical scraper 25, second vertical scraper 26, horizontal sludge scraping mechanism 3, second sludge scraping bracket 31, second fixing fixture 32, third installation groove 321, third circular connection groove 322, third spring 323, third connecting rod 324, horizontal scraper 33, rotary drive mechanism 4, rotary drive motor 41, rotary shaft 42, lifting device 5, lifting base 51, upper base 511, lower base 512, bracket main body 6, first angle adjustment structure 7, first drive motor 71, drive shaft 72, bearing bracket 73, second angle adjustment structure 8, second drive motor 81, rack 82, gear 83, aerobic biological reaction tank 9. Specific embodiments

[0022] The following combines the drawings and related embodiments to illustrate the implementation manners of the present invention. The implementation manners of the present invention are not limited to the following embodiments, and the related necessary components of the present invention in the technical field should be regarded as well-known technologies in the technical field and can be known and mastered by those skilled in the technical field.

[0023] A sedimentation mechanism includes a sedimentation tank main body 1, and the sedimentation tank main body 1 is communicated with an influent channel 11, an effluent channel 12, a sludge discharge pipe 13 and a sludge return pipe 14. A sludge scraping mechanism, a rotary drive mechanism 4, a lifting device 5, and a bracket main body 6 connecting the rotary drive mechanism 4 and the sludge scraping mechanism are arranged in the sedimentation tank main body 1; In the technical solution of the sedimentation tank main body 1 of the present invention, the treated sewage flows into the sedimentation tank main body 1 from the influent channel. The sludge precipitates at the bottom of the sedimentation tank main body 1, and the clear water flows out through the effluent channel 12. The sludge flows outwards through the sludge discharge pipe 13 at the bottom of the sedimentation tank, and part of the sludge flows back to the aerobic biological reaction tank 9 through the sludge return pipe 14; Furthermore, in the above solution, a working gallery bridge 15 is provided above the sedimentation tank main body 1. A lifting device 5 is provided in the middle of the working gallery bridge 15. The output end of the lifting device 5 is connected to the support main body 6 and is used to drive and adjust the horizontal height of the sludge scraping mechanism. When the sedimentation tank main body 1 is in a sedimentation state, the lifting device 5 drives the sludge scraping mechanism to be separated from the bottom of the sedimentation tank main body 1. After the initial sedimentation is completed, the sludge-water mixture at the bottom of the sedimentation tank main body 1 is scraped. The output end of the lifting device 5 passes through and extends vertically downward along the thickness direction of the working gallery bridge 15. As the rotary drive mechanism 4 drives the sludge scraping mechanism to rotate, the bottom and the wall of the sedimentation tank main body 1 are scraped for sludge; In the technical solution of the sludge scraping mechanism of the present invention, the sludge scraping mechanism includes a vertical sludge scraping mechanism 2 and a plurality of horizontal sludge scraping mechanisms 3. The vertical sludge scraping mechanism 2 is arranged at both ends of the support main body 6. A first angle adjustment structure 7 is provided between the vertical sludge scraping mechanism 2 and the support main body 6. The horizontal sludge scraping mechanisms 3 are arranged at equal intervals along the length direction of the support main body 6. A second angle adjustment structure 8 is provided between the horizontal sludge scraping mechanisms 3 and the support main body 6. The horizontal sludge scraping mechanisms 3 scrape the sludge-water at the bottom of the sedimentation tank in the arranged state, and the vertical sludge scraping mechanism 2 scrapes the sludge-water on the wall of the sedimentation tank main body 1. The first angle adjustment structure 7 and the second angle adjustment structure 8 are respectively used to adjust the scraping angles of the vertical sludge scraping mechanism 2 and the horizontal sludge scraping mechanisms 3.

[0024] Furthermore, in the above solution, the horizontal sludge scraping mechanisms 3 are arranged at equal intervals along the length direction of the support main body 6, so as to realize the scraping of the sludge at the bottom of the sedimentation tank main body 1. The second angle adjustment structure 8 adjusts the inclination angle of the horizontal scraper, so that the horizontal sludge scraping mechanisms 3 have different working angles; It should be noted that different inclination angles of the horizontal scraper 33 will cause the motor to bear different torques. Similarly, different inclination angles will also have different scraping effects on the bottom of the sedimentation tank; it includes inclined arrangement or linear arrangement. In the linear arrangement state, the torque borne by the rotary drive mechanism 4 is larger, and the working load of the motor is larger, but the sludge scraping efficiency is higher. In the inclined arrangement state, the torque borne by the rotary drive mechanism 4 is smaller, the working load of the motor is smaller, and the working life is long, but the sludge scraping efficiency is lower; Furthermore, in the above solution, the horizontal sludge scraping mechanism 3 includes a second sludge scraping support 31 connected to the support main body 6, a second fixing clamp 32 arranged at the end of the second sludge scraping support 31, and a horizontal scraper 33. An elastic compensation structure is provided between the horizontal scraper 33 and the second fixing clamp 32; A third mounting groove 321 is provided in the second fixing fixture 32, and the elastic compensation structure includes a third circular connecting groove 322 arranged at the bottom of the third mounting groove 321, a third spring 323 arranged in the third circular connecting groove 322, and a third connecting rod 324 passed through the third spring 323, and the third connecting rod 324 is fixed to the back of the transverse scraper 33.

[0025] The transverse scraper 33 is arranged in the second fixing clamp 32, and is elastically connected to the second fixing clamp 32 through the elastic compensation structure. When scraping sludge, the elastic compensation structure is used to avoid damage caused by overly hard contact with the bottom of the sedimentation tank body 1. At the same time, under the action of its elastic force, a certain resistance force is maintained between the transverse scraper 33 and the bottom of the sedimentation tank body 1, thereby effectively scraping sludge.

[0026] In the technical solution of the second angle adjustment structure 8, the end of the bracket body 6 is provided with a second angle adjustment structure 8 connected to the second mud scraper bracket 31, and the second angle adjustment structure 8 includes a second drive motor 81 and a rack 82. The end of the second drive motor 81 is connected to the side of the rack 82 to drive the rack 82 to move linearly, and the end of the second mud scraper bracket 31 is provided with a gear 83 that is adapted to the shape of the rack 82.

[0027] When the angle of the second scraper bracket 31 needs to be adjusted, the rack 82 is driven by the second drive motor 81 to slide linearly, thereby driving the gear 83 to rotate, driving the second scraper bracket 31 to synchronously rotate the transverse scraper 33, so as to adjust the scraping angle of the transverse scraper 33. Furthermore, by sliding the rack 82, the angles of several transverse scraper mechanisms 3 arranged in a row can be adjusted synchronously. In the technical solution of the vertical scraping mechanism 2 of the present invention, the vertical scraping mechanism 2 includes a first scraping bracket 21 connected to the bracket body 6, a first fixing fixture 22 arranged at the end of the first scraping bracket 21, and a first vertical scraper 25 and a second vertical scraper 26, and an elastic switching structure is provided between the first vertical scraper 25 and the second vertical scraper 26 and the first fixing fixture 22, and the elastic switching structure realizes automatic switching of the first vertical scraper 25 and the second vertical scraper 26 when the vertical scraping mechanism 2 adjusts the scraping angle; Furthermore, in the above solution, a first angle adjustment structure 7 is provided at the end of the bracket body 6 and is connected to the first sludge scraping bracket 21. The first angle adjustment structure 7 includes a first driving motor 71, a driving shaft 72, and a bearing bracket 73. One end of the driving shaft 72 is connected to the first driving motor 71, and the other end is connected to the vertical sludge scraping mechanism 2. The bearing bracket 73 is horizontally arranged on the bracket body 6, and the first driving motor 71 is arranged on the bearing bracket 73 with its output end facing the vertical sludge scraping mechanism 2.

[0028] It should be noted that when the vertical sludge scraping mechanism 2 needs to be adjusted, the first driving motor 71 is horizontally arranged on the bearing bracket 73. The first driving motor 71 drives the driving shaft 72 to drive the first sludge scraping bracket 21 to rotate, thereby realizing the angle adjustment of the vertical sludge scraping mechanism 2. The angle adjustment degree of the first driving motor 71 is 45° and 90°.

[0029] It should be noted that different inclination angles of the vertical sludge scraping mechanism 2 will cause the motor to bear different torques. Similarly, different inclination angles will also have different scraping effects on the bottom of the sedimentation tank; these include being arranged at a 45° inclination and being arranged in a vertical straight line. In the vertical straight line arrangement state, the torque borne by the rotary driving mechanism 4 is relatively large, and the working load of the motor is relatively large, but the sludge scraping efficiency is relatively high. In the 45° inclination arrangement state, the torque borne by the rotary driving mechanism 4 is relatively small, the working load of the motor is relatively small, and the working life is long, but the sludge scraping efficiency is relatively low; Furthermore, in the above solution, a first installation groove 221 and a second installation groove 222 are provided in the first fixing clamp 22. The first vertical scraper 25 and the second vertical scraper 26 are respectively arranged in the first installation groove 221 and the second installation groove 222; Furthermore, in the above solution, the front end face of the first vertical scraper 25 is an arc-shaped cutter head, the front end face of the second vertical scraper 26 is a strip-shaped cutter head, the elastic switching structure is arranged in the first installation groove 221 and the second installation groove 222, and the arc-shaped cutter head of the first vertical scraper 25 in the 45° inclination state fits with the arc-shaped surface of the pool wall of the sedimentation tank body 1; It should be noted that in another embodiment, the first installation groove 221 and the second installation groove 222 are arranged as a communicating structure, and the first circular connection groove 223 and the second circular connection groove 224 are arranged at the bottom of the first installation groove 221 and the second installation groove 222, so that the fitting surface between the first vertical scraper 25 and the second vertical scraper 26 is in a fitting state, which can prevent soil from drilling into the gap between the first vertical scraper 25 and the second vertical scraper 26 during scraping; Further, in the above solution, the elastic switching structure includes a first circular connection groove 223 provided at the bottom of the first installation groove 221, a first spring 225 provided in the first circular connection groove 223, and a first connecting rod 23 inserted into the first spring 225; One end of the first connecting rod 23 is fixedly connected to the back of the first vertical scraper 25, and the other end extends into the first circular connection groove 223.

[0030] One end of the first spring 225 abuts against the bottom of the first circular connection groove 223, and the other end abuts against the end of the first connecting rod 23. Under the elastic force of the first spring 225, the first vertical scraper 25 remains in contact with the inner wall of the sedimentation tank main body 1; Further, in the above solution, the elastic switching structure further includes a second circular connection groove 224 provided at the bottom of the second installation groove 222, a second spring 226 provided in the second circular connection groove 224, and a second connecting rod 24 inserted into the second spring 226; One end of the second connecting rod 24 is fixedly connected to the back of the second vertical scraper 26, and the other end extends into the second circular connection groove 224.

[0031] Similarly, the second spring 226 has the same function as the first spring 225. One end of the second spring 226 abuts against the bottom of the second circular connection groove 224, and the other end abuts against the end of the second connecting rod 24. Under the elastic force of the second spring 226, the second vertical scraper 26 remains in contact with the inner wall of the sedimentation tank main body 1; It should be noted that when the vertical sludge scraping mechanism 2 is converted from a vertical state to a 45° inclined state, the strip-shaped cutter head of the second vertical scraper 26 cannot meet the sludge scraping of the arc-shaped inner wall. The first vertical scraper 25 pops out under the elastic force of the elastic switching mechanism and fits on the inner wall of the sedimentation tank main body 1 to fill the gap between the second vertical scraper 26 and the inner wall of the sedimentation tank main body 1; Further, in the above solution, a lifting base 51 is connected to the output end of the lifting device 5. The rotary drive mechanism 4 is arranged in the lifting base 51. The rotary drive mechanism 4 includes a rotary drive motor 41 and a rotary shaft 42. The output end of the rotary drive motor 41 is arranged downward in the lifting base 51.

[0032] The lifting base 51 includes an upper base 511 and a lower base 512. The output end of the lifting device 5 is fixed to the top end of the upper base 511. The rotary drive motor 41 is disposed in the upper base 511, and the rotary shaft 42 is connected to the lower base 512. The bracket main body 6 is fixedly connected to the lower base 512. By rotating the rotary shaft 42 through the rotary drive motor 41, the lower base 512 is driven to rotate, so as to realize the rotation of the bracket main body 6.

[0033] A sewage treatment device includes an aerobic biological reaction tank 9. An influent flow channel 11 is provided between the aerobic biological reaction tank 9 and the sedimentation tank main body 1. The output end of the sludge return pipeline 14 is communicated with the aerobic biological reaction tank 9.

[0034] The above are only the preferred embodiments of the present invention. It should be noted that for those of ordinary skill in the art in this technical field, without departing from the principle of the present invention, several improvements and refinements can still be made, and these improvements and refinements should also be regarded as the protection scope of the present invention.

Claims

1. A sedimentation mechanism, characterized in that: The sedimentation tank body (1) comprises a sedimentation tank body (1), wherein the sedimentation tank body (1) is provided with a water inlet channel (11), a water outlet channel (12), a sludge discharge pipe (13) and a sludge return pipe (14); the sedimentation tank body (1) is provided with a sludge scraping mechanism, a rotary drive mechanism (4), a lifting device (5), and a bracket body (6) connecting the rotary drive mechanism (4) and the sludge scraping mechanism; The scraping mechanism comprises a vertical scraping mechanism (2) and a plurality of transverse scraping mechanisms (3); the vertical scraping mechanism (2) is arranged at both ends of the support body (6); a first angle adjustment structure (7) is provided between the vertical scraping mechanism (2) and the support body (6); the transverse scraping mechanisms (3) are arranged at equal intervals along the length direction of the support body (6); and a second angle adjustment structure (8) is provided between the transverse scraping mechanism (3) and the support body (6); The vertical mud scraping mechanism (2) comprises a first mud scraping bracket (21) connected to the bracket body (6), a first fixing fixture (22) arranged at the end of the first mud scraping bracket (21), and a first vertical scraper (25) and a second vertical scraper (26); an elastic force switching structure is provided between the first vertical scraper (25) and the second vertical scraper (26) and the first fixing fixture (22).

2. The sedimentation mechanism according to claim 1, characterized in that: A working gallery (15) is provided above the sedimentation tank body (1), a lifting device (5) is provided in the middle of the working gallery (15), an output end of the lifting device (5) is connected to the support body (6), and the output end of the lifting device (5) passes through the working gallery (15) in a thickness direction and extends vertically downward.

3. The sedimentation mechanism according to claim 1, characterized in that: A first angle adjustment structure (7) connected to the first mud scraping bracket (21) is provided at the end of the bracket body (6); the first angle adjustment structure (7) comprises a first drive motor (71), a drive shaft (72) and a bearing bracket (73); one end of the drive shaft (72) is connected to the first drive motor (71), and the other end is connected to the vertical mud scraping mechanism (2); the bearing bracket (73) is horizontally arranged on the bracket body (6); the first drive motor (71) is arranged on the bearing bracket (73) with its output end facing the vertical mud scraping mechanism (2).

4. The sedimentation mechanism according to claim 1, characterized in that: A first mounting groove (221) and a second mounting groove (222) are provided in the first fixing fixture (22), and the first vertical scraper (25) and the second vertical scraper (26) are respectively arranged in the first mounting groove (221) and the second mounting groove (222); The front end surface of the first vertical scraper (25) is an arc-shaped blade head, the front end surface of the second vertical scraper (26) is a strip-shaped blade head, and the elastic force switching structure is arranged in the first installation groove (221) and the second installation groove (222).

5. The sedimentation mechanism according to claim 4, characterized in that: The elastic force switching structure comprises a first circular connecting groove (223) arranged at the bottom of the first installation groove (221), a first spring (225) arranged in the first circular connecting groove (223), and a first connecting rod (23) passing through the first spring (225); One end of the first connecting rod (23) is fixedly connected to the back of the first vertical scraper (25), and the other end extends into the first circular connecting groove (223).

6. The sedimentation mechanism according to claim 4, characterized in that: The elastic force switching structure further comprises a second circular connecting groove (224) arranged at the bottom of the second mounting groove (222), a second spring (226) arranged in the second circular connecting groove (224), and a second connecting rod (24) passing through the second spring (226); One end of the second connecting rod (24) is fixedly connected to the back of the second vertical scraper (26), and the other end extends into the second circular connecting groove (224).

7. The sedimentation mechanism according to claim 1, characterized in that: The transverse mud scraping mechanism (3) comprises a second mud scraping bracket (31) connected to the bracket body (6), a second fixing fixture (32) arranged at the end of the second mud scraping bracket (31), and a transverse scraper (33), wherein an elastic compensation structure is arranged between the transverse scraper (33) and the second fixing fixture (32); A third mounting groove (321) is provided in the second fixing fixture (32), and the elastic compensation structure comprises a third circular connecting groove (322) arranged at the bottom of the third mounting groove (321), a third spring (323) arranged in the third circular connecting groove (322), and a third connecting rod (324) passing through the third spring (323), wherein the third connecting rod (324) is fixed to the back of the transverse scraper (33).

8. The sedimentation mechanism according to claim 7, characterized in that: A second angle adjustment structure (8) connected to the second mud scraper bracket (31) is provided at the end of the bracket body (6); the second angle adjustment structure (8) comprises a second drive motor (81) and a rack (82); the end of the second drive motor (81) is connected to the side of the rack (82) to drive the rack (82) to move linearly; and a gear (83) matching the shape of the rack (82) is provided at the end of the second mud scraper bracket (31).

9. The sedimentation mechanism according to claim 1, characterized in that: The output end of the lifting device (5) is connected to a lifting base (51), the rotary drive mechanism (4) is arranged in the lifting base (51), the rotary drive mechanism (4) comprises a rotary drive motor (41) and a rotary shaft (42), and the output end of the rotary drive motor (41) is arranged downward in the lifting base (51).

10. A sewage treatment device, characterized in that: It comprises an aerobic biological reaction tank (9), wherein the aerobic biological reaction tank (9) is connected to the sedimentation tank body (1) and is provided with a water inlet channel (11), and the output end of the sludge return pipe (14) is connected to the aerobic biological reaction tank (9).

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