Aeration pipe assembly for AO reaction tank

Abstract

The utility model discloses an aeration pipe assembly for an AO reaction tank, which belongs to the technical field of AO reaction tanks and comprises a main pipeline suitable for being connected and communicated with a gas pumping device; the plurality of first branch pipelines are respectively communicated with the main pipeline; one first branch pipeline corresponds to a plurality of second branch pipelines, and the plurality of second branch pipelines are respectively connected and communicated with the first branch pipeline; the first branch pipe can selectively move towards or away from the main pipe in the height direction. According to the aeration pipe assembly designed by the utility model, the first branch pipeline moves to drive the plurality of second branch pipelines to move towards or away from the AO reaction tank in the height direction, and when the plurality of second branch pipelines move to the position above the liquid level of the AO reaction tank, a maintainer can maintain, maintain or replace the plurality of second branch pipelines, so that the AO reaction tank is prevented from being emptied; and the maintenance, maintenance and replacement efficiency of the aerator pipe assembly is improved.

Description

Technical Field

[0001] The utility model belongs to the technical field of AO reaction tanks, and in particular relates to an aeration pipe component used in an AO reaction tank. Background Art

[0002] In the related art, the aeration pipe assembly is suitable for injecting air into the AO reaction tank, so that the microorganisms in the AO reaction tank can metabolize normally, so that the microorganisms can decompose organic matter in the sewage, and the microorganisms can convert ammonia nitrogen in the sewage into nitrate. In the prior art, the branch pipe of the aeration pipe extends below the liquid surface of the AO reaction tank. When the branch pipe is damaged, the maintenance personnel need to empty the AO reaction tank and then repair or replace the branch pipe, and the efficiency of branch pipe repair or replacement is low. Utility Model Content

[0003] The utility model aims to solve at least one of the technical problems existing in the prior art. To this end, one purpose of the utility model is to propose an aeration pipe assembly for an AO reaction tank. According to the aeration pipe assembly for an AO reaction tank designed by the utility model, the first pipe moves to drive multiple second pipes to move toward or away from the AO reaction tank in the height direction. When the multiple second pipes move above the liquid surface of the AO reaction tank, maintenance personnel can repair, maintain or replace the multiple second pipes to avoid emptying the AO reaction tank, thereby improving the maintenance, maintenance and replacement efficiency of the aeration pipe assembly.

[0004] In order to achieve the above object, the utility model provides the following technical solutions:

[0005] The utility model provides an aeration pipe assembly for an AO reaction tank, comprising: a main pipeline, the main pipeline is suitable for being connected to and communicated with a pumping device; a first branch pipeline, the first branch pipeline is structured as a plurality of first branch pipelines, and the plurality of first branch pipelines are respectively communicated with the main pipeline; a second branch pipeline, one first branch pipeline corresponds to a plurality of second branch pipelines, and the plurality of second branch pipelines are respectively connected to and communicated with the first branch pipeline; wherein the first branch pipeline can selectively move toward or away from the main pipeline in a height direction.

[0006] According to the aeration pipe assembly for an AO reaction tank of the utility model, its first branch pipe can selectively move toward or away from the main pipe in the height direction, thereby realizing that multiple second branch pipes can move toward or away from the AO reaction tank in the height direction. When the multiple second branch pipes move above the liquid surface of the AO reaction tank, maintenance personnel can repair, maintain or replace the multiple second branch pipes to avoid emptying the AO reaction tank, thereby improving the repair, maintenance and replacement efficiency of the aeration pipe assembly. At the same time, through the above-mentioned arrangement, the aeration pipe assembly can adjust the aeration depth of the AO reaction tank, thereby optimizing the aeration effect of the AO reaction tank.

[0007] Furthermore, it also includes: a connecting pipe, which is arranged between the main pipe and the first branch pipe, and has a movable connecting part. The connecting pipe is connected and communicated with the main pipe, and the connecting part is connected and communicated with the first branch pipe.

[0008] Further, the connecting pipeline includes: a first branch pipeline, one end of which is connected to and communicated with the main pipeline; a second branch pipeline, the second branch pipeline is configured as the connecting part, at least a portion of the second branch pipeline is movably arranged in the first branch pipeline, and the free end of the second branch pipeline is connected to and communicated with the first branch pipeline.

[0009] Further, a first sealing flange is provided at one end of the first branch pipe toward the second branch pipe, and the first sealing flange extends radially toward the second branch pipe, and / or a second sealing flange is provided at one end of the second branch pipe toward the first branch pipe, and the second sealing flange extends radially toward the first branch pipe.

[0010] Furthermore, it also includes: a driving motor, a driving end of the driving motor is connected to the second branch pipe, and the driving motor is suitable for driving the second branch pipe to move toward or away from the first branch pipe in the height direction.

[0011] Furthermore, it also includes: a sealing rubber, wherein the sealing rubber is arranged between the first sealing flange and the second branch pipe, and / or the sealing rubber is arranged between the second sealing flange and the first branch pipe.

[0012] Furthermore, it also includes: a sealing plate, which is rotatably disposed in the connecting pipe, and the sealing plate is rotated to selectively connect or block the main pipe and the first branch pipe.

[0013] Furthermore, the main pipeline is constructed in two pieces, and the two main pipelines are respectively arranged at two ends of the first branch pipeline in the axial direction.

[0014] Other advantages, objectives and features of the utility model will be described in the following description and will be apparent to those skilled in the art to some extent, or those skilled in the art can be taught from the practice of the utility model. The objectives and other advantages of the utility model can be realized and obtained through the following description. BRIEF DESCRIPTION OF THE DRAWINGS

[0015] In order to make the purpose, technical solution and beneficial effects of the utility model clearer, the utility model is described with the following drawings:

[0016] Figure 1This is a schematic diagram of the cooperation between the aeration pipe assembly and the AO reaction tank of the utility model;

[0017] Figure 2 It is a structural schematic diagram of the connecting pipeline of the utility model;

[0018] Figure 3 It is a partial cross-sectional view of the connecting pipe of the utility model.

[0019] The following are marked in the accompanying drawings:

[0020] 1. Aeration pipe assembly; 2. AO reaction tank;

[0021] 10, main pipeline; 20, first branch pipeline; 30, second branch pipeline;

[0022] 40. Connecting pipe; 41. First branch pipe; 411. First sealing flange; 412. First thread; 42. Second branch pipe; 421. Second sealing flange; 422. Third thread 422. DETAILED DESCRIPTION

[0023] In order to make the purpose, technical solutions and advantages of the utility model more clearly understood, the utility model is further described in detail below in conjunction with embodiments and drawings. The schematic implementation manner of the utility model and its description are only used to explain the utility model and are not intended to limit the utility model.

[0024] In the following description, a large number of specific details are set forth in order to provide a thorough understanding of the present invention. However, it is apparent to those skilled in the art that these specific details are not necessary to implement the present invention. In other examples, in order to avoid obscuring the present invention, well-known structures, circuits, materials or methods are not specifically described.

[0025] Throughout the specification, references to "one embodiment," "an embodiment," "an example," or "an example" mean that a particular feature, structure, or characteristic described in conjunction with the embodiment or example is included in at least one embodiment of the present invention. Therefore, the phrases "one embodiment," "an embodiment," "an example," or "an example" appearing in various places throughout the specification do not necessarily all refer to the same embodiment or example. In addition, particular features, structures, or characteristics may be combined in one or more embodiments or examples in any suitable combination and / or sub-combination. In addition, it will be appreciated by those of ordinary skill in the art that the figures provided herein are for illustrative purposes and that the figures are not necessarily drawn to scale. The term "and / or" as used herein includes any and all combinations of one or more of the associated listed items.

[0026] In the description of the present invention, it should be understood that the terms "front", "rear", "left", "right", "up", "down", "vertical", "horizontal", "high", "low", "inside", "outside", etc., indicating directions or positional relationships, are based on the directions or positional relationships shown in the accompanying drawings, and are only for the convenience of describing the present invention and simplifying the description, and do not indicate or imply that the device or element referred to must have a specific direction, be constructed and operated in a specific direction, and therefore should not be understood as limiting the scope of protection of the present invention.

[0027] Embodiment 1:

[0028] like Figure 1-Figure 3 As shown, the utility model provides an aeration pipe assembly 1 for an AO reaction tank, comprising: a main pipeline 10, a first branch pipeline 20 and a second branch pipeline 30, the main pipeline 10 is suitable for being connected and communicated with a pumping device, the first branch pipeline 20 is constructed in plurality, the plurality of first branch pipelines 20 are respectively communicated with the main pipeline 10, one first branch pipeline 20 corresponds to a plurality of second branch pipelines 30, the plurality of second branch pipelines 30 are respectively connected and communicated with the first branch pipeline 20; wherein the first branch pipeline 20 can selectively move toward or away from the main pipeline 10 in the height direction.

[0029] In some embodiments, the main pipeline 10 is overlapped above the AO reaction tank 2, and the main pipeline 10 is connected and fixed to the AO reaction tank 2 by fasteners, one end of the main pipeline 10 is connected and communicated with the air pump device, the main pipeline 10 extends along the length direction of the AO reaction tank 2, and multiple first branch pipelines 20 are respectively connected and communicated with the main pipeline 10, and multiple first branch pipelines 20 are spaced apart in the extension direction of the main pipeline 10. Multiple first branch pipelines 20 extend in the width direction of the AO reaction tank 2 respectively. One first branch pipeline 20 corresponds to multiple second branch pipelines 30, and multiple second branch pipelines 30 are respectively connected and communicated with corresponding first branch pipelines 20, and multiple second branch pipelines 30 extend toward the AO reaction tank 2 in the height direction.

[0030] It can be understood that the air pumping device is suitable for pumping the air around itself into the main pipeline 10, and the air enters the AO reaction tank 2 after passing through the main pipeline 10, the first branch pipeline 20 and the second branch pipeline 30 in sequence. The oxygen in the air is necessary for aerobic microorganisms to carry out metabolic activities such as nitrification. Aerobic microorganisms can remove organic matter in the water (under aerobic conditions, oxygen-rich air is pumped into the reaction tank to provide aerobic microorganisms (mainly bacteria) with sufficient oxygen. These microorganisms can use organic pollutants (such as BOD, biochemical oxygen demand) in sewage as a food source through respiration, metabolize them, and convert them into carbon dioxide, water and energy, thereby achieving the degradation of organic matter and purifying water quality); and aerobic microorganisms can convert ammonia nitrogen in water into nitrates (ammonia nitrogen (NH 2+) transferred from anaerobic zones or anoxic zones). 4+ ) is oxidized to nitrite (NO 2 - ) and further oxidized to nitrate (NO 3 - ). This two-step process is completed by nitrite bacteria and nitrifying bacteria respectively. The nitrification reaction not only removes harmful ammonia nitrogen, but also creates conditions for subsequent denitrification (carried out in anaerobic or anoxic zones), achieving cyclic removal of nitrogen).

[0031] It is worth noting that the first branch pipe 20 is movably connected to the main pipe 10, and the first branch pipe 20 can be selectively moved toward or away from the main pipe 10 in the height direction, so that the multiple second branch pipes 30 can be selectively moved toward or away from the AO reaction tank 2 in the height direction, thereby realizing that the aeration pipe assembly 1 can be injected with gas at different depths of the AO reaction tank 2, thereby optimizing the aeration effect and avoiding energy waste caused by ineffective aeration or excessive aeration.

[0032] At the same time, when one or more second branch pipes 30 are damaged, the maintenance personnel can move the first branch pipe 20 away from the main pipe 10 in the height direction, thereby realizing the movement of multiple second branch pipes 30 away from the AO reaction tank 2 in the height direction until the multiple second branch pipes 30 are located above the liquid surface of the AO reaction tank 2. At this time, the maintenance personnel can repair or replace the damaged second branch pipes 30, avoiding the need to empty the entire AO reaction tank 2 before repairing or replacing the damaged second branch pipes 30, thereby improving the maintenance convenience of the second branch pipes 30 and thus improving the maintenance efficiency of the second branch pipes 30.

[0033] Of course, when performing maintenance on the aeration pipe assembly 1, the maintenance personnel can also move the first branch pipe 20 away from the main pipe 10 in the height direction, so as to achieve the movement of the multiple second branch pipes 30 away from the AO reaction tank 2 in the height direction until the multiple second branch pipes 30 are located above the liquid surface of the AO reaction tank 2. At this time, the maintenance personnel can perform maintenance on the multiple second branch pipes 30 to avoid emptying the entire AO reaction tank 2, thereby improving the maintenance efficiency of the second branch pipes 30, thereby improving the maintenance efficiency of the aeration pipe assembly 1.

[0034] According to the aeration pipe assembly 1 for an AO reaction tank of the utility model, the first branch pipe 20 thereof can selectively move toward or away from the main pipe 10 in the height direction, so that the plurality of second branch pipes 30 can move toward or away from the AO reaction tank 2 in the height direction. When the plurality of second branch pipes 30 move above the liquid surface of the AO reaction tank 2, maintenance personnel can repair, maintain or replace the plurality of second branch pipes 30 to avoid emptying the AO reaction tank 2, thereby improving the repair, maintenance and replacement efficiency of the aeration pipe assembly 1. Meanwhile, through the above-mentioned arrangement, the aeration pipe assembly 1 can adjust the aeration depth of the AO reaction tank 2, thereby optimizing the aeration effect of the AO reaction tank 2.

[0035] Embodiment 2:

[0036] In this embodiment, based on the first embodiment, the aeration pipe assembly 1 further includes: a connecting pipe 40, which is arranged between the main pipe 10 and the first branch pipe 20, and has a movable connecting portion, the connecting pipe 40 is connected and communicated with the main pipe 10, and the connecting portion is connected and communicated with the first branch pipe 20.

[0037] In some embodiments, the connecting pipe 40 has a connecting portion, which can be selectively moved toward or away from the connecting pipe 40 in the height direction. The connecting pipe 40 is connected and communicated with the main pipe 10, and the connecting portion is connected and communicated with the first branch pipe 20. Thus, the main pipe 10 and the first branch pipe 20 are connected and communicated through the connecting pipe 40.

[0038] It can be understood that the connecting part moves toward or away from the connecting pipe 40 in the height direction, thereby realizing the movement of the first branch pipe 20 toward or away from the main pipe 10 in the height direction, and then realizing the movement of multiple second branch pipes 30 toward or away from the AO reaction tank 2 in the height direction.

[0039] Embodiment three:

[0040] In this embodiment, based on the second embodiment, the connecting pipe 40 includes: a first branch pipe 41 and a second branch pipe 42, one end of the first branch pipe 41 is connected to and communicated with the main pipe 10, the second branch pipe is constructed as a connecting part, at least part of the second branch pipe 42 is movably arranged in the first branch pipe 41, and the free end of the second branch pipe 42 is connected to and communicated with the first branch pipe 20.

[0041] In some embodiments, at least a portion of the second branch pipe 42 is movably disposed in the first branch pipe 41, and one end of the first branch pipe 41 away from the second branch pipe 42 is connected and communicated with the main pipe 10, and one end of the second branch pipe 42 away from the first branch pipe 41 is connected and communicated with the first branch pipe 20, and the second branch pipe 42 moves in the height direction relative to the first branch pipe 41, thereby realizing the movement of the first branch pipe 20 in the height direction relative to the main pipe 10, and further realizing the movement of multiple second branch pipes 30 in the height direction relative to the AO reaction tank 2.

[0042] In some embodiments, a first thread 412 is provided on the outer peripheral wall of the end of the first branch pipe 41 away from the second branch pipe 42, the main pipe 10 is provided with a connecting hole corresponding to the first branch pipe 41, and the inner peripheral wall of the connecting hole is provided with a second thread, and the first thread 412 is threadedly cooperated with the second thread to connect and communicate the first branch pipe 41 with the main pipe 10; a third thread 422 is provided on the outer peripheral wall of the end of the second branch pipe 42 away from the first branch pipe 41, and a fourth thread is provided on the inner wall of the first branch pipe 20, and the third thread 422 is threadedly cooperated with the fourth thread to connect and communicate the second branch pipe 42 with the first branch pipe 20.

[0043] According to some embodiments of the utility model, a first sealing flange 411 is provided at one end of the first branch pipe 41 facing the second branch pipe 42, and the first sealing flange 411 extends radially toward the second branch pipe 42, and / or a second sealing flange 421 is provided at one end of the second branch pipe 42 facing the first branch pipe 41, and the second sealing flange 421 extends radially toward the first branch pipe 41.

[0044] In some embodiments, a first sealing flange 411 is provided on the first branch pipe 41. The first sealing flange 411 is provided at one end of the first branch pipe 41 facing the second branch pipe 42. The first sealing flange 411 extends radially toward the second branch pipe 42, and the inner circumferential wall of the first sealing flange 411 in the radial direction abuts against the outer circumferential wall of the second branch pipe 42. Thus, the first sealing flange 411 can seal the gap between the first branch pipe 41 and the second branch pipe 42, thereby improving the sealing performance of the aeration pipe assembly 1.

[0045] In other embodiments, a second sealing flange 421 is provided on the second branch pipe 42, and the second sealing flange 421 is provided at one end of the second branch pipe 42 facing the first branch pipe 41. The second sealing flange 421 extends radially toward the first branch pipe 41, and the radial outer peripheral wall of the second sealing flange 421 abuts against the inner peripheral wall of the first branch pipe 41. Thus, the second sealing flange 421 can seal the gap between the first branch pipe 41 and the second branch pipe 42, thereby improving the sealing performance of the aeration pipe assembly 1.

[0046] In some other embodiments, a first sealing flange 411 is provided at one end of the first branch pipe 41 facing the second branch pipe 42, and the first sealing flange 411 extends radially toward the second branch pipe 42, and a second sealing flange 421 is provided at one end of the second branch pipe 42 facing the first branch pipe 41, and the second sealing flange 421 extends radially toward the first branch pipe 41. Thus, the first sealing flange 411 forms a first layer of sealing between the first branch pipe 41 and the second branch pipe 42, and the second sealing flange 421 forms a second layer of sealing between the first branch pipe 41 and the second branch pipe 42. That is, the above-mentioned arrangement can make the aeration pipe assembly 1 more sealed.

[0047] Embodiment 4:

[0048] In this embodiment, based on the third embodiment, the aeration pipe assembly 1 further includes a driving motor, the driving end of which is connected to the second branch pipe 42 , and the driving motor is suitable for driving the second branch pipe 42 to move toward or away from the first branch pipe 41 in the height direction.

[0049] It can be understood that the driving motor is connected and fixed to the main pipeline 10 and / or the AO reaction tank 2, and the driving motor has a driving end, which can move toward or away from the driving motor in the height direction when the driving motor is working, and the driving end is connected to the second branch pipeline 42. Therefore, the driving motor can move the driving end when it is working, and the movement of the driving end can move the first branch pipeline 20 toward or away from the main pipeline 10 in the height direction, thereby realizing the movement of multiple second branch pipelines 30 toward or away from the AO reaction tank 2 in the height direction.

[0050] It is worth noting that the setting of the drive motor can improve the degree of automation of the aeration pipe assembly 1, thereby facilitating the adjustment of the height of the plurality of second branch pipes 30. Of course, a microbial sensor can be set in the AO reaction tank 2, and the microbial sensor is suitable for detecting the number of microorganisms in the AO reaction tank 2. The microbial sensor is connected to the drive motor, and the microbial sensor can control the operation of the drive motor. Therefore, through the above setting, the aeration pipe assembly 1 can automatically adjust the height of the second branch pipe 30 according to the number of microorganisms, thereby adjusting the aeration depth and optimizing the aeration effect of the AO reaction tank 2.

[0051] According to some embodiments of the utility model, the aeration pipe assembly 1 further includes: a sealing rubber, which is arranged between the first sealing flange 411 and the second branch pipe 42, and / or, the sealing rubber is arranged between the second sealing flange 421 and the first branch pipe 41. It can be understood that the sealing rubber can further improve the sealing effect between the first branch pipe 41 and the second branch pipe 42, thereby further improving the sealing performance of the aeration pipe assembly 1.

[0052] In some embodiments, a sealing rubber may be provided between the first sealing flange 411 and the second branch pipe 42; or a sealing rubber may be provided between the second sealing flange 421 and the first branch pipe 41; or a sealing rubber may be provided between the first sealing flange 411 and the second branch pipe 42, and a sealing rubber may be provided between the second sealing flange 421 and the first branch pipe 41, and there is no limitation here.

[0053] Embodiment five:

[0054] On the basis of the second embodiment, the aeration pipe assembly 1 of this embodiment further includes: a sealing plate, which is rotatably arranged in the connecting pipe 40, and the sealing plate rotates to selectively connect or block the main pipe 10 with the first branch pipe 20. It can be understood that when the sealing plate is rotated to connect the first branch pipe 20 with the main pipe 10, the air can enter the AO reaction tank 2 after passing through the first branch pipe 20 and the second branch pipe 30 in sequence; when the sealing plate is rotated to block the first branch pipe 20 from the main pipe 10, the air cannot enter the blocked first branch pipe 20. At this time, the maintenance personnel can repair, maintain or replace the multiple second branch pipes 30 corresponding to the first branch pipe 20, so as to avoid the AO reaction tank 2 from stopping working when the second branch pipes 30 are repaired, maintained or replaced, thereby ensuring the working efficiency of the AO reaction tank 2.

[0055] According to some embodiments of the utility model, the main pipeline 10 is constructed in two parts, and the two main pipelines 10 are respectively arranged at the two ends of the first branch pipeline 20 in the axial direction. It can be understood that the two main pipelines 10 are respectively located at the two ends of the first branch pipeline 20 in the axial direction, and the two main pipelines 10 are respectively connected to the first branch pipeline 20. Therefore, through the above arrangement, the gas distribution of the AO reaction tank 2 can be made more uniform, the aeration uniformity of the AO reaction tank 2 is ensured, and the local hypoxia or oversaturation phenomenon of the AO reaction tank 2 is avoided. At the same time, the two ends of the first branch pipeline 20 move in the height direction relative to the two main pipelines 10, so that the movement of the first branch pipeline 20 is more stable, thereby ensuring the working stability of the aeration pipe assembly 1.

[0056] Finally, it should be noted that the above preferred embodiments are only used to illustrate the technical solution of the utility model rather than to limit it. Although the utility model has been described in detail through the above preferred embodiments, those skilled in the art should understand that various changes can be made in form and details without departing from the scope defined by the claims of the utility model.

Claims

1. An aeration pipe assembly for an AO reaction tank, characterized in that: include: A main pipeline (10), wherein the main pipeline (10) is suitable for being connected to and in communication with a gas pumping device; a first branch pipeline (20), wherein the first branch pipeline (20) is structured as a plurality of first branch pipelines, and the plurality of first branch pipelines (20) are respectively connected to the main pipeline (10); A second branch pipeline (30), one of the first branch pipelines (20) corresponds to a plurality of the second branch pipelines (30), and the plurality of the second branch pipelines (30) are respectively connected to and communicated with the first branch pipeline (20); wherein The first branch pipeline (20) can be selectively moved toward or away from the main pipeline (10) in the height direction.

2. The aeration pipe assembly for an AO reaction tank according to claim 1, characterized in that: Also includes: A connecting pipe (40), the connecting pipe (40) being arranged between the main pipe (10) and the first branch pipe (20), the connecting pipe (40) having a movable connecting portion, the connecting pipe (40) being connected to and in communication with the main pipe (10), and the connecting portion being connected to and in communication with the first branch pipe (20).

3. The aeration pipe assembly for an AO reaction tank according to claim 2, characterized in that: The connecting pipeline (40) comprises: A first branch pipe (41), one end of the first branch pipe (41) being connected to and in communication with the main pipe (10); A second branch pipe (42), the second branch pipe is configured as the connecting portion, at least a portion of the second branch pipe (42) is movably disposed in the first branch pipe (41), and a free end of the second branch pipe (42) is connected to and communicates with the first branch pipe (20).

4. The aeration pipe assembly for an AO reaction tank according to claim 3, characterized in that: A first sealing flange (411) is provided at one end of the first branch pipe (41) facing the second branch pipe (42), and the first sealing flange (411) extends radially toward the second branch pipe (42); and / or a second sealing flange (421) is provided at one end of the second branch pipe (42) facing the first branch pipe (41), and the second sealing flange (421) extends radially toward the first branch pipe (41).

5. The aeration pipe assembly for an AO reaction tank according to claim 4, characterized in that: Also includes: A driving motor, wherein a driving end of the driving motor is connected to the second branch pipe (42), and the driving motor is suitable for driving the second branch pipe (42) to move toward or away from the first branch pipe (41) in a height direction.

6. The aeration pipe assembly for an AO reaction tank according to claim 4, characterized in that: Also includes: A sealing rubber, wherein the sealing rubber is arranged between the first sealing flange (411) and the second branch pipe (42), and / or the sealing rubber is arranged between the second sealing flange (421) and the first branch pipe (41).

7. The aeration pipe assembly for an AO reaction tank according to claim 2, characterized in that: Also includes: A sealing plate is rotatably disposed in the connecting pipe (40), and the sealing plate rotates to selectively connect or block the main pipe (10) and the first branch pipe (20).

8. The aeration pipe assembly for an AO reaction tank according to claim 1, characterized in that: The main pipeline (10) is constructed in two pieces, and the two main pipelines (10) are respectively arranged at two ends of the first branch pipeline (20) in the axial direction.

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