Aeration equipment for sewage treatment

Abstract

The invention belongs to the technical field of sewage treatment, particularly relates to aeration equipment for sewage treatment, and provides the following scheme aiming at the problem that the existing aeration equipment for sewage treatment cannot adjust an aeration strategy according to the sewage amount in an aeration tank: the aeration equipment for sewage treatment comprises a tank body, the upper side of the tank body is fixedly connected with four symmetrical supporting seats; a movable seat is arranged on the pool body, two symmetrical through holes are formed in the movable seat, a round notch is formed in the movable seat and located between the two through holes, a full-range movable module is arranged outside the movable seat, and a self-adaptive aeration module is arranged below the movable seat and located in the pool body. According to the aeration equipment for sewage treatment disclosed by the invention, the aeration degree of the equipment on sewage can be automatically adjusted according to the actual amount of the sewage in the tank body, so that self-adaptive aeration is performed on the sewage, and the energy-saving effect of the equipment is also improved while the aeration treatment effect on the sewage is ensured.

Description

Technical Field

[0001] The invention relates to the technical field of sewage treatment, and in particular to an aeration device for sewage treatment. Background Art

[0002] The principle of aeration is to dissolve oxygen in the air into water, or to release unnecessary gases and volatile substances in the water into the air. The function of aeration is to stir and mix, so that the activated sludge is suspended in the aeration tank, fully in contact with the wastewater, and increase the dissolved oxygen concentration in the wastewater, so as to facilitate the degradation of organic matter.

[0003] Existing aeration equipment for sewage treatment usually operates at a fixed power and cannot adaptively control the equipment according to the amount of sewage in the aeration tank. When there is less sewage in the tank, it still operates at high power, resulting in poor energy-saving effects. Summary of the invention

[0004] The invention discloses an aeration device for sewage treatment, aiming to solve the technical problem that the existing aeration device for sewage treatment in the background technology cannot adjust the aeration strategy according to the amount of sewage in the aeration tank.

[0005] The aeration device for sewage treatment proposed by the present invention comprises a tank body, wherein four symmetrical support seats are fixedly connected to the upper side of the tank body, and a movable seat is arranged on the tank body, and two symmetrical through holes are provided on the movable seat, and a circular notch is provided on the movable seat, and the circular notch is located between the two through holes, and a full-range movable module is arranged outside the movable seat, and an adaptive aeration module is arranged below the movable seat, and the adaptive aeration module is located in the tank body; The adaptive aeration module comprises a movable cylinder, an air bag is arranged outside the movable cylinder, and three built-in paddles are arranged below the movable cylinder and are evenly spaced. The outsides of the built-in paddles are all slidably connected with extended paddles. The full-range mobile module comprises two symmetrical long rods, and the two long rods are both slidably connected with a mobile platform.

[0006] By providing a tank body, a support seat, a movable seat, an adaptive aeration module, a full-range movable module, a circular notch and a through hole, the device utilizes the adaptive aeration module to enable the aeration equipment to automatically adjust the aeration degree of the sewage according to the actual amount of sewage in the tank body, thereby adaptively aerating the sewage, while ensuring the aeration treatment effect of the sewage, it also improves the energy-saving effect of the equipment.

[0007] In a preferred scheme, the bottom of the movable seat is fixedly connected to an isolation frame, the inner wall of the isolation frame is fixedly connected to motor one, the output end of motor one is connected to a threaded rod through a coupling, a circular opening is provided on the upper side of the movable cylinder, the inner wall of the circular opening is rotatably connected to the outside of the threaded rod through an external thread, and a columnar groove is provided on the upper side of the movable cylinder, a guide rod is slidably connected in the columnar groove, and the upper side of the guide rod is fixedly connected to the bottom of the isolation frame; the outside of the movable cylinder is slidably connected to a movable ring, the outside of the movable ring is movably connected to the outside of the airbag, and three circumferentially equidistantly distributed reserved grooves are provided on the movable ring, and connecting rods are slidably connected in the reserved grooves, the bottom of the movable cylinder is fixedly connected to a water-proof frame, the top inner wall of the water-proof frame is fixedly connected to motor two, and the output end of motor two is connected to a rotating shaft through a coupling; the bottom of the rotating shaft is fixedly connected to a connecting seat, and the outside of the connecting seat is fixedly connected to three circumferentially equidistantly distributed fixed tables, and the fixed tables located on the same side and the inner The side opposite to the built-in blade is fixedly connected, and a groove is opened on the side of the built-in blade away from the fixed platform, and the inner wall of the groove on the side close to the fixed platform is fixedly connected with a spring, and one end of the spring away from the fixed platform is fixedly connected to the inner wall of the extended blade on the same side; the three connecting rods are slidably connected to the same rotating ring 1 on the outside, the inner wall of the rotating ring 1 is movably connected to the outside of the movable cylinder, the outside of the rotating ring 1 is fixedly connected with three circumferentially equidistant bosses, the bosses are movably connected with guide roller 1, and the bottoms of the three connecting rods are fixedly connected to the upper side of the connecting seat; the three connecting rods are slidably connected to the same rotating ring 2 on the outside, the rotating ring 2 is located below the rotating ring 1, the outside of the rotating ring 2 is fixedly connected with three circumferentially equidistant support rods, and the outside of the guide roller 1 and the guide roller 2 located on the same side is provided with the same pulling rope, one end of the three pulling ropes is fixedly connected to the outside of the extended blade on the same side, and the other end is fixedly connected to the bottom of the movable ring.

[0008] By providing an adaptive aeration module, the adaptive aeration module uses air bags and pull ropes to enable the device to automatically control the blade area formed by the built-in blades and the extended blades according to the sewage liquid level in the pool body, thereby completing the aeration treatment of the sewage in a timely and effective manner, greatly improving the aeration efficiency of the sewage, reducing the workload of personnel, realizing automation, and improving the applicability of the equipment.

[0009] In a preferred embodiment, a circular opening is provided on each of the four support seats, and the inner walls of the two circular openings on the same side are fixedly connected to the outside of the long rod on the same side, and the same screw rod is movably connected to the opposite side of the two moving platforms, and two symmetrical guide rods are arranged on the outside of the screw rod; the two guide rods are fixedly connected to the opposite side of the two moving platforms, and the outside of the screw rod is rotatably connected to the inner wall of the circular groove opening by an external thread, and the inner walls of the two through holes are respectively slidably connected to the outside of the two guide rods, and the outside of the screw rod is fixedly connected to an external gear ring; the upper side of the moving platform on the same side of the external gear ring is connected to a motor four by bolts, and the output end of the motor four is connected to a gear two through a coupling, and the gear two is meshed with the external gear ring, and a motor three is fixedly connected to the moving platform away from the motor four; a narrow groove is provided on the moving platform on the same side of the motor three, and a gear one is arranged in the narrow groove, and the output end of the motor three is connected to the gear one through a coupling, and a groove is provided on the outside of the long rod on the same side of the gear, and a rack is fixedly connected in the groove, and the rack and the gear one are meshed with each other.

[0010] By providing a full-range movable module, the full-range movable module utilizes a long rod and a screw rod to enable the movable seat to achieve full-range movement on the pool body, so that the movable seat can drive the adaptive aeration module to perform uniform aeration treatment on the sewage in the pool body, thereby improving the aeration coverage rate, shortening the aeration time, and improving the aeration effect.

[0011] From the above, it can be seen that the aeration equipment for sewage treatment provided by the present invention can enable the aeration equipment to automatically adjust the aeration degree of the sewage according to the actual amount of sewage in the pool body, thereby adaptively aerating the sewage, while ensuring the effect of aeration treatment of the sewage, it also improves the energy-saving effect of the equipment. BRIEF DESCRIPTION OF THE DRAWINGS

[0012] Figure 1 This is a schematic diagram of the overall structure of an aeration device for sewage treatment proposed by the present invention; Figure 2 This is a schematic cross-sectional view of an aeration device for sewage treatment proposed by the present invention; Figure 3 This is a schematic diagram of the structure of an adaptive aeration module of an aeration device for sewage treatment proposed by the present invention; Figure 4 This is a schematic diagram of the structure of a movable cylinder of an aeration device for sewage treatment proposed by the present invention; Figure 5 This is a schematic diagram of the water-blocking frame structure of an aeration device for sewage treatment proposed by the present invention; Figure 6 This is a schematic diagram of the built-in blade structure of an aeration device for sewage treatment proposed by the present invention; Figure 7This is a schematic diagram of the full range mobile module structure of an aeration device for sewage treatment proposed by the present invention; Figure 8 This is a schematic diagram of the structure of a mobile station of an aeration device for sewage treatment proposed by the present invention.

[0013] In the figure: 1, tank body; 2, support seat; 3, moving seat; 4, adaptive aeration module; 401, isolation frame; 402, threaded rod; 403, movable cylinder; 404, motor 1; 405, columnar groove; 406, guide rod; 407, movable ring; 408, air bag; 409, reserved groove; 410, water-blocking frame; 411, connecting rod; 412, rotating ring 1; 413, guide roller 1; 414, rotating ring 2; 415, support rod; 416, guide roller 2; 417, pulling rope; 41 8. Motor 2; 419. Rotating shaft; 420. Connecting seat; 421. Fixed platform; 422. Built-in paddle; 423. Extended paddle; 424. Groove; 425. Spring; 5. Full-range moving module; 501. Long rod; 502. Moving platform; 503. Screw rod; 504. Guide rod; 505. Narrow groove; 506. Rack; 507. Gear 1; 508. Motor 3; 509. Motor 4; 510. Gear 2; 511. External gear ring; 6. Circular notch; 7. Through hole. DETAILED DESCRIPTION

[0014] The technical solutions in the embodiments of the present invention will be described clearly and completely below in conjunction with the drawings in the embodiments of the present invention. Obviously, the described embodiments are only part of the embodiments of the present invention, rather than all the embodiments.

[0015] The aeration equipment for sewage treatment disclosed in the present invention is mainly used in the scenario where the existing aeration equipment for sewage treatment cannot adjust the aeration strategy according to the amount of sewage in the aeration tank.

[0016] Reference Figure 1-8 , an aeration device for sewage treatment, comprising a tank body 1, four symmetrical support seats 2 are connected to the upper side of the tank body 1 by bolts, and a moving seat 3 is arranged on the tank body 1, two symmetrical through holes 7 are opened on the moving seat 3, a circular notch 6 is opened on the moving seat 3, and the circular notch 6 is located between the two through holes 7, a full-range moving module 5 is arranged outside the moving seat 3, and an adaptive aeration module 4 is arranged below the moving seat 3, and the adaptive aeration module 4 is located in the tank body 1; The adaptive aeration module 4 includes a movable cylinder 403, an air bag 408 is arranged outside the movable cylinder 403, and three built-in paddles 422 are arranged below the movable cylinder 403 and are evenly spaced. The outsides of the built-in paddles 422 are all slidably connected with extended paddles 423. The full-range mobile module 5 includes two symmetrical long rods 501 , and a mobile platform 502 is slidably connected to the two long rods 501 .

[0017] Specifically, during the aeration treatment of sewage in the tank body 1, the movable cylinder 403 is inserted into the sewage using the adaptive aeration module 4. Under the action of the buoyancy of the sewage, the airbag 408 drives the extended blade 423 to unfold on the built-in blade 422, so that the extended blade 423 and the built-in blade 422 can stir the sewage within a certain range and the activated sludge at the bottom of the tank body 1. While the adaptive aeration module 4 is aerating, the full-range mobile module 5 is used to drive the mobile seat 3 to move, so that the mobile seat 3 can drive the adaptive aeration module 4 to aerate the sewage at different positions in the tank body 1. The device uses the adaptive aeration module 4 to enable the aeration equipment to automatically adjust the aeration degree of the sewage according to the actual amount of sewage in the tank body 1, thereby adaptively aerating the sewage, while ensuring the aeration treatment effect of the sewage, but also improving the energy-saving effect of the equipment.

[0018] Reference Figure 3 , Figure 4 , Figure 5 and Figure 6In a preferred embodiment, the bottom of the movable seat 3 is connected to an isolation frame 401 by bolts, the inner wall of the isolation frame 401 is connected to a motor 404 by bolts, the output end of the motor 404 is connected to a threaded rod 402 by a coupling, a circular opening is provided on the upper side of the movable cylinder 403, the inner wall of the circular opening is rotatably connected to the outside of the threaded rod 402 by an external thread, and a columnar groove 405 is provided on the upper side of the movable cylinder 403, a guide rod 406 is slidably connected in the columnar groove 405, and the upper side of the guide rod 406 is connected to the bottom of the isolation frame 401 by bolts; a movable ring 407 is slidably connected to the outside of the movable cylinder 403, and the movable ring The outside of 407 is rotatably connected to the outside of the airbag 408 through a bearing, and three reserved grooves 409 equidistantly distributed around the circumference are opened on the movable ring 407, and connecting rods 411 are slidably connected in the reserved grooves 409. The bottom of the movable cylinder 403 is connected to a water-proof frame 410 by bolts, and the top inner wall of the water-proof frame 410 is connected to a second motor 418 by bolts, and the output end of the second motor 418 is connected to a rotating shaft 419 through a coupling; the bottom of the rotating shaft 419 is connected to a connecting seat 420 by bolts, and the outside of the connecting seat 420 is connected to three fixed platforms 421 equidistantly distributed around the circumference by bolts, and the fixed platforms 421 on the same side are connected to The opposite side of the built-in blade 422 is connected by bolts, and a groove 424 is provided on the side of the built-in blade 422 away from the fixed platform 421, and the inner wall of the groove 424 close to the fixed platform 421 is connected with a spring 425 by bolts, and the end of the spring 425 away from the fixed platform 421 is connected to the inner wall of the extended blade 423 on the same side by bolts; the outside of the three connecting rods 411 is slidably connected to the same rotating ring 1 412, and the inner wall of the rotating ring 1 412 is rotatably connected to the outside of the movable cylinder 403 through a bearing, and the outside of the rotating ring 1 412 is connected to three circumferentially equidistant bosses by bolts, and the bosses are all rotatably connected by bearings. A guide roller 1 413 is movably connected thereto, and the bottoms of the three connecting rods 411 are all connected to the upper side of the connecting seat 420 by bolts; the three connecting rods 411 are externally slidably connected to the same rotating ring 2 414, and the rotating ring 2 414 is located below the rotating ring 1 412, and the outside of the rotating ring 2 414 is connected to three circumferentially equidistant support rods 415 by bolts, and the outsides of the guide roller 1 413 and the guide roller 2 416 located on the same side are provided with the same pulling rope 417, one end of the three pulling ropes 417 are all connected to the outside of the extended blade 423 on the same side by bolts, and the other ends are all connected to the bottom of the movable ring 407 by bolts.

[0019] Specifically, when aeration treatment is performed, the motor 404 is started, and the motor 404 drives the threaded rod 402 to rotate, so that the movable cylinder 403 descends in height and enters the sewage. After the airbag 408 contacts the sewage, under the buoyancy of the sewage, the airbag 408 always floats on the water surface while the movable cylinder 403 continues to descend, so that the movable ring 407 connected to the airbag 408 pulls the pulling rope 417, so that the pulling rope 417 guided by the guide roller 1 413 and the guide roller 2 416 drags the extended paddle 423 on the built-in paddle 422 to overcome the elastic force of the spring 425 and slide in the direction away from the built-in paddle 422, thereby increasing the overall length formed by the built-in paddle 422 and the extended paddle 423, and the motor 2 418 is started, and the motor 2 418 drives the connecting seat 420 to rotate, so that the built-in paddle 422 and the extended paddle 423 stir the sewage during rotation, and roll up the activated sludge precipitated at the bottom of the tank body 1 from the bottom and mix it with the sewage.

[0020] In a specific application scenario, the adaptive aeration module 4 is mainly suitable for the adaptive aeration link in the adaptive aeration process, that is, the adaptive aeration module 4 uses the airbag 408 and the pulling rope 417 to enable the device to automatically control the blade area formed by the built-in blade 422 and the extended blade 423 through the sewage liquid level in the pool body 1, thereby completing the aeration treatment of the sewage in a timely and effective manner, greatly improving the aeration efficiency of the sewage, reducing the workload of personnel, realizing automation, and improving the applicability of the equipment.

[0021] Reference Figure 7 and Figure 8In a preferred embodiment, a circular opening is provided on each of the four support seats 2, and the inner walls of the two circular openings on the same side are connected to the outer side of the long rod 501 on the same side by bolts, and the opposite sides of the two moving platforms 502 are rotatably connected to the same screw rod 503 through a bearing, and two symmetrical guide rods 504 are arranged on the outer side of the screw rod 503; the two guide rods 504 are connected to the opposite sides of the two moving platforms 502 by bolts, the outer side of the screw rod 503 is rotatably connected to the inner wall of the circular groove 6 by an external thread, the inner walls of the two through holes 7 are respectively slidably connected to the outer sides of the two guide rods 504, and the outer side of the screw rod 503 is connected to an outer toothed ring 511 by bolts; and the outer toothed ring 511 is connected to the outer toothed ring 511 by bolts. The upper side of the moving platform 502 on the same side is connected to a motor 4 509 by bolts, and the output end of the motor 4 509 is connected to a gear 2 510 by a coupling, and the gear 2 510 is meshed with an outer gear ring 511, and the moving platform 502 away from the motor 4 509 is connected to a motor 3 508 by bolts; a narrow groove 505 is provided on the moving platform 502 on the same side as the motor 3 508, and a gear 1 507 is arranged in the narrow groove 505, and the output end of the motor 3 508 is connected to the gear 1 507 by a coupling, and a groove is provided on the outside of the long rod 501 on the same side as the gear 1 507, and a rack 506 is connected in the groove by bolts, and the rack 506 and the gear 1 507 are meshed with each other.

[0022] Specifically, while the adaptive aeration module 4 is performing aeration treatment, the motor three 508 is started, and the motor three 508 drives the gear one 507 meshing with the rack 506 to rotate, so that the movable platform 502 can drive the movable seat 3 to move in the long axis direction of the tank body 1, and the motor four 509 is started, and the motor four 509 drives the outer gear ring 511 meshing with the gear two 510 to rotate, so that the screw rod 503 drives the movable seat 3 to move on the short axis of the tank body 1, so that the adaptive aeration module 4 on the movable seat 3 can be moved to various positions of the sewage in the tank body 1.

[0023] In specific application scenarios, the full-range mobile module 5 is mainly suitable for the full-range mobile link in the full-range mobile process, that is, the full-range mobile module 5 uses the long rod 501 and the screw rod 503 to enable the mobile seat 3 to achieve full-range movement on the pool body 1, so that the mobile seat 3 can drive the adaptive aeration module 4 to evenly aerate the sewage in the pool body 1, thereby improving the aeration coverage rate, shortening the aeration time, and improving the aeration effect.

[0024] Working principle: When aeration treatment is performed, the motor 404 is started, and the motor 404 drives the threaded rod 402 to rotate, so that the movable cylinder 403 is lowered and enters the sewage. After the air bag 408 contacts the sewage, under the buoyancy of the sewage, the air bag 408 always floats on the water surface while the movable cylinder 403 continues to descend, so that the movable ring 407 connected to the air bag 408 pulls the pulling rope 417, so that the pulling rope 417 guided by the guide roller 1 413 and the guide roller 2 416 drags the extended blade 423 on the built-in blade 422 to overcome the elastic force of the spring 425 and slide in the direction away from the built-in blade 422, thereby increasing the overall length of the built-in blade 422 and the extended blade 423. The motor 2 418 is started, and the motor 2 418 is started. 18 drives the connecting seat 420 to rotate, so that the built-in paddle 422 and the extended paddle 423 stir the sewage during rotation, and roll up the activated sludge precipitated at the bottom of the tank body 1 from the bottom and mix it with the sewage. While the adaptive aeration module 4 is performing aeration treatment, the motor three 508 is started, and the motor three 508 drives the gear one 507 meshing with the rack 506 to rotate, so that the moving platform 502 can drive the moving seat 3 to move in the long axis direction of the tank body 1, and the motor four 509 is started, and the motor four 509 drives the outer gear ring 511 meshing with the gear two 510 to rotate, so that the screw rod 503 drives the moving seat 3 to move on the short axis of the tank body 1, so that the adaptive aeration module 4 on the moving seat 3 can move to various positions of the sewage in the tank body 1.

[0025] The above description is only a preferred specific implementation manner of the present invention, but the protection scope of the present invention is not limited thereto. Any technician familiar with the technical field can make equivalent replacements or changes according to the technical scheme and inventive concept of the present invention within the technical scope disclosed by the present invention, which should be covered by the protection scope of the present invention.

Claims

1. An aeration device for sewage treatment, comprising a tank body (1), characterized in that: Four symmetrical support seats (2) are fixedly connected to the upper side of the tank body (1), and a movable seat (3) is arranged on the tank body (1), and two symmetrical through holes (7) are provided on the movable seat (3), and a circular notch (6) is provided on the movable seat (3), and the circular notch (6) is located between the two through holes (7), and a full-range movable module (5) is arranged outside the movable seat (3), and an adaptive aeration module (4) is arranged below the movable seat (3), and the adaptive aeration module (4) is located inside the tank body (1); The adaptive aeration module (4) comprises a movable cylinder (403), an air bag (408) is arranged outside the movable cylinder (403), and three built-in paddles (422) are arranged below the movable cylinder (403) and are equidistantly distributed around the circumference, and the outsides of the built-in paddles (422) are all slidably connected to extended paddles (423); The full-range mobile module (5) comprises two symmetrical long rods (501), and the two long rods (501) are both slidably connected to a mobile platform (502).

2. The aeration equipment for sewage treatment according to claim 1, characterized in that: The bottom of the movable seat (3) is fixedly connected to an isolation frame (401), the inner wall of the isolation frame (401) is fixedly connected to a motor 1 (404), the output end of the motor 1 (404) is connected to a threaded rod (402) via a coupling, a circular opening is provided on the upper side of the movable cylinder (403), the inner wall of the circular opening is rotatably connected to the outside of the threaded rod (402) via an external thread, and a columnar groove (405) is provided on the upper side of the movable cylinder (403), a guide rod (406) is slidably connected in the columnar groove (405), and the upper side of the guide rod (406) is fixedly connected to the bottom of the isolation frame (401).

3. The aeration equipment for sewage treatment according to claim 2, characterized in that: The outside of the movable cylinder (403) is slidably connected to a movable ring (407), the outside of the movable ring (407) is movably connected to the outside of the airbag (408), and the movable ring (407) is provided with three reserved grooves (409) equidistantly distributed around the circumference, and connecting rods (411) are slidably connected in the reserved grooves (409), the bottom of the movable cylinder (403) is fixedly connected to a water-blocking frame (410), the top inner wall of the water-blocking frame (410) is fixedly connected to a second motor (418), and the output end of the second motor (418) is connected to a rotating shaft (419) via a coupling.

4. The aeration equipment for sewage treatment according to claim 3, characterized in that: The bottom of the rotating shaft (419) is fixedly connected to a connecting seat (420), and the outside of the connecting seat (420) is fixedly connected to three circumferentially equidistantly distributed fixing platforms (421), and the fixing platforms (421) located on the same side are fixedly connected to the side opposite to the built-in paddle (422), and a groove (424) is provided on the side of the built-in paddle (422) away from the fixing platform (421), and a spring (425) is fixedly connected to the inner wall of the groove (424) on the side close to the fixing platform (421), and one end of the spring (425) away from the fixing platform (421) is fixedly connected to the inner wall of the extended paddle (423) on the same side.

5. The aeration equipment for sewage treatment according to claim 3, characterized in that: The three connecting rods (411) are slidably connected to the same rotating ring (412) on the outside, the inner wall of the rotating ring (412) is movably connected to the outside of the movable cylinder (403), the outside of the rotating ring (412) is fixedly connected to three circumferentially equidistant bosses, each of which is movably connected to a guide roller (413), and the bottoms of the three connecting rods (411) are fixedly connected to the upper side of the connecting seat (420).

6. The aeration equipment for sewage treatment according to claim 3, characterized in that: The three connecting rods (411) are externally slidably connected to a same rotating ring 2 (414), the rotating ring 2 (414) is located below the rotating ring 1 (412), the rotating ring 2 (414) is externally fixedly connected to three circumferentially equidistantly distributed support rods (415), and the guide rollers 1 (413) and 2 (416) located on the same side are externally provided with a same pulling rope (417), one end of each of the three pulling ropes (417) is fixedly connected to the outside of the extended blade (423) on the same side, and the other end of each of the three pulling ropes (417) is fixedly connected to the bottom of the movable ring (407).

7. The aeration equipment for sewage treatment according to claim 1, characterized in that: The four support seats (2) are all provided with a circular opening, and the inner walls of the two circular openings on the same side are fixedly connected to the outside of the long rod (501) on the same side, and the opposite sides of the two moving platforms (502) are movably connected to the same screw rod (503), and two symmetrical guide rods (504) are arranged outside the screw rod (503).

8. The aeration equipment for sewage treatment according to claim 7, characterized in that: The two guide rods (504) are fixedly connected to the opposite sides of the two moving platforms (502); the outside of the screw rod (503) is rotatably connected to the inner wall of the circular notch (6) via an external thread; the inner walls of the two through holes (7) are respectively slidably connected to the outside of the two guide rods (504); and the outside of the screw rod (503) is fixedly connected to an external gear ring (511).

9. The aeration equipment for sewage treatment according to claim 8, characterized in that: The upper side of the movable platform (502) on the same side as the outer gear ring (511) is connected to a motor four (509) via bolts, and the output end of the motor four (509) is connected to a gear two (510) via a coupling, and the gear two (510) is meshed with the outer gear ring (511), and a motor three (508) is fixedly connected to the movable platform (502) away from the motor four (509).

10. The aeration equipment for sewage treatment according to claim 7, characterized in that: A narrow slot (505) is provided on the movable platform (502) on the same side as the motor three (508), a gear one (507) is arranged in the narrow slot (505), the output end of the motor three (508) is connected to the gear one (507) via a coupling, a slot is provided on the outside of the long rod (501) on the same side as the gear one (507), a rack (506) is fixedly connected in the slot, and the rack (506) and the gear one (507) are meshed with each other.

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