A water level adaptive decanter

Abstract

The application discloses a water level self-adaptive water decanter, relates to the technical field of water pollution control and treatment, and can solve the problem that the existing rotary water decanter is difficult to adaptively adjust the water discharge capacity along with the water level change. The water level self-adaptive water decanter comprises a water decanting groove main body and a float assembly, further comprises a water discharge capacity maintaining assembly which can adaptively adjust the height of a water discharge port based on the draught of the water decanting groove main body; the water discharge capacity maintaining assembly is arranged in the water decanting groove main body and rotationally connected with the water decanting groove main body, one end of the water discharge capacity maintaining assembly away from the water discharge port is fixedly connected to the float assembly, and the float assembly can drive the water discharge capacity maintaining assembly to rotate in the water decanting groove main body based on the water level change.

Description

Technical Field

[0001] This invention relates to the field of water pollution control and treatment technology, specifically to a water level adaptive decanter. Background Technology

[0002] The decanter is a key drainage device in the SBR wastewater treatment process. Its core function is to continuously and evenly skim the supernatant from the top of the reaction tank without disturbing the settled sludge layer. The performance of the decanter directly affects the quality of the effluent and the operational stability of the entire SBR system.

[0003] Currently, common decanters mainly include rotary decanters. A rotary decanter consists of a decanting weir, branch pipes, a main pipe, a slewing support, a drive unit, and an automatic control system. During operation, the drive unit moves the decanting weir in a variable-speed circular motion around the center line of the slewing support, introducing the supernatant through the weir into the branch pipe and then discharging it through the main pipe. However, its weir is a rigid structure, and its descent trajectory is a fixed arc, making it difficult to accurately match continuous changes in water level, especially at the end of the decanting process. Improper control of the descent speed can easily disturb the sludge layer; float-type decanters utilize the principle of buoyancy to automatically raise and lower the weir with changes in water level. These devices have a relatively simple structure, but the accuracy of the inlet depth and flow control at the weir is limited, resulting in poor adjustability; siphon-type decanters use the difference in liquid level inside and outside the tank to create a siphon for drainage. Their outflow rate decreases throughout the decanting process and is closely related to the cross-sectional area of ​​the outlet pipe and the head height. This type of decanter has a low decanting depth that is difficult to adjust, requiring high design precision.

[0004] Among them, rotary decanters have the widest range of applications. Their height adjustment mainly relies on PLC control, which is rigid and cannot adaptively adjust the decanting flow rate according to the water level. If the flow rate is too high, the high-speed water flow can easily shake the settled activated sludge layer. If the flow rate is too low, it will significantly reduce the drainage efficiency. A decanter with a more stable drainage flow rate is needed to maintain a high drainage efficiency.

[0005] Based on the above background, the inventors have designed a water level adaptive decanter, which can solve the problem that existing rotary decanters are difficult to adaptively adjust the drainage volume according to water level changes. Therefore, this application is hereby filed. Summary of the Invention

[0006] The purpose of this application is to provide a water level adaptive decanter to solve the problem that existing rotary decanters are difficult to adaptively adjust the drainage volume in response to changes in water level.

[0007] To solve the above-mentioned technical problems, the present invention adopts the following solution: This application provides a water level adaptive decanter, including a decanter body and a float assembly, and also includes a drainage volume maintenance component that can adaptively adjust the height of the drain outlet based on the draft of the decanter body; The drainage volume maintenance component is disposed inside the decanting tank body and rotatably connected thereto. The end of the drainage volume maintenance component away from the drain outlet is fixedly connected to the float assembly. The float assembly can drive the drainage volume maintenance component to rotate inside the decanting tank body based on water level changes.

[0008] Optionally, it also includes a drainage trough body disposed within the decanting trough body; The drainage volume maintenance component includes a baffle plate body rotatably connected to the decanting tank body, and an arc-shaped baffle plate. The end of the baffle plate body away from the drainage tank body is fixedly connected to the float assembly, and the arc-shaped baffle plate is connected to the end of the baffle plate body close to the drainage tank body. The arc-shaped baffle plate is slidably connected to the top of the drainage tank body. The center of the arc-shaped water baffle coincides with the rotation axis of the water baffle.

[0009] Optionally, an inverted pressure sensor is provided at one end of the top of the drainage trough body near the baffle plate, with the signal acquisition end of the pressure sensor protruding downward from the top of the drainage trough body.

[0010] Optionally, an installation step is provided at one end of the top of the drainage trough body near the baffle plate, and the pressure sensor is embedded and fixed in the installation step; The top of the main body of the drainage trough is also provided with wire mounting holes; It also includes a wire cover plate set between the decanting tank body and the drainage tank body. The wire cover plate, the decanting tank body and the drainage tank body form a wire routing cavity. The signal wire of the pressure sensor extends into the wire routing cavity through the wire mounting hole.

[0011] Optionally, the main body of the baffle plate includes a first plate and a second plate arranged in parallel, and a rotating cylinder, wherein the first plate and the second plate are fixedly connected to the two ends of the rotating cylinder; The drainage volume maintenance component also includes a support crossbar with both ends fixed to the opposite end faces inside the decanter body, and a rotating cylinder is fitted onto the support crossbar and rotatably connected to it. The arc-shaped baffle is fixedly connected to the end of the first plate away from the rotating cylinder, and the end of the second plate away from the rotating cylinder is connected to the float assembly.

[0012] Optionally, the ratio of the length of the second plate to the length of the first plate is in the range of 1 to 2.

[0013] Optionally, the drainage volume maintenance component further includes multiple movable baffles arranged at equal intervals; The main body of the decanting trough is provided with multiple fixed baffles arranged at equal intervals on the end face at the bottom of the decanting trough opening; The movable and fixed stop bars are staggered along their vertical projections.

[0014] Optionally, a buffer strip is provided on the end face of the main body of the decanting trough located at the bottom of the decanting trough opening; The fixed baffle bar is installed through the buffer bar; When the drain outlet is at its lowest height, the projections of the movable baffle and the fixed baffle along the central axis of the float assembly overlap.

[0015] Optionally, the float assembly includes a float body and connecting arms rotatably connected to both ends of the float body, with one end of the connecting arm away from the float body rotatably connected to the end of the decanting tank body. The displacement maintenance component is fixedly connected to the outer peripheral wall of the pontoon body.

[0016] Optionally, it also includes a horizontally positioned rotary tube assembly, multiple downcomers, and a push rod mechanism for placement at the pool edge. One end of the downcomer is connected to the rotary pipe assembly, and the other end is connected to the decanting tank body; The push rod mechanism has a push rod body connected to the descending tube.

[0017] The beneficial effects of this invention are: I. This application designs a drainage volume maintenance component, which is fixed to the float assembly and can rotate within the decanting tank body. This allows the two major factors affecting drainage volume—the drainage outlet area and the height difference between the drainage outlet and the water surface—to change synchronously and inversely. Specifically, when the water level is high and the height difference between the drainage outlet and the water surface is large, the drainage outlet area decreases; when the water level decreases and the height difference between the drainage outlet and the water surface decreases, the drainage outlet area increases. Furthermore, because the increase or decrease in the drainage outlet area is synchronously and inversely linked to the change in water level, the drainage volume of this application can be adaptively maintained within a certain range. This effectively solves the problem that existing rotary decanters cannot adaptively adjust the drainage volume in response to changes in water level.

[0018] Second, by setting up a drainage trough body and an arc-shaped baffle, this application can prevent water in the pool from being discharged between the arc-shaped baffle and the top of the drainage trough body after the main body of the decanting trough is completely submerged in the water. This avoids the failure of the reverse adjustment linkage between the two factors affecting drainage volume, namely the drainage outlet area and the height of the drainage outlet from the water surface, as designed above.

[0019] Third, this application designs a pressure sensor so that after the drain outlet area is increased to the maximum, a pressure signal can be applied to the pressure sensor through the drainage volume maintenance component, thereby providing a data basis for the movement of the entire decanter and preventing the subsequent drainage volume from gradually decreasing.

[0020] Fourth, this application can achieve all-round scum blocking by designing fixed baffles and movable baffles, and the float assembly can also provide a certain scum blocking function. Therefore, it can realize the concept of two-stage scum blocking, in which the float assembly achieves initial blocking and the fixed baffles and movable baffles achieve secondary blocking, to prevent the scum in the pool from being discharged. Attached Figure Description

[0021] Figure 1 This is a cross-sectional view of the weir mechanism at high water levels in an embodiment of this application.

[0022] Figure 2 for Figure 1 A magnified view of a portion of point A in the middle.

[0023] Figure 3 This is a cross-sectional view of the weir mechanism at low water levels in an embodiment of this application.

[0024] Figure 4 This is a front view schematic diagram of the weir mechanism in the embodiments of this application.

[0025] Figure 5 This is a side view of an embodiment of the present application.

[0026] Explanation of reference numerals in the attached figures: 1-Decanting trough body, 101-Decanting trough opening, 11-Buffer strip, 12-Fixing baffle, 2-Float assembly, 21-Float body, 22-Connecting arm, 3-Drainage trough body, 301-Wire mounting hole, 31-Drain outlet, 32-Arc-shaped notch, 33-Arc-shaped hole, 34-Mounting step, 4-Drainage volume maintenance assembly, 41-Support crossbar, 42-Water baffle body, 421-First plate, 422-Second plate, 423-Rotating cylinder, 43-Arc-shaped water baffle, 44-Movable baffle, 5-Pressure sensor, 6-Wire cover plate, 61-Wire routing cavity, 7-Downcomer, 8-Rotating pipe assembly, 9-Push rod mechanism, 91-Push rod body. Detailed Implementation

[0027] The present invention will be further described in detail below with reference to the embodiments and accompanying drawings, but the embodiments of the present invention are not limited thereto.

[0028] like Figures 1 to 5As shown, this embodiment provides a water level adaptive decanter, including a decanting tank body 1 and a float assembly 2, and also includes a drainage volume maintenance assembly 4 that can adaptively adjust the height of the drain outlet 31 based on the draft of the decanting tank body 1. The drainage volume maintenance component 4 is disposed inside the decanting tank body 1 and rotatably connected thereto. The end of the drainage volume maintenance component 4 away from the drain outlet 31 is fixedly connected to the float assembly 2. The float assembly 2 can drive the drainage volume maintenance component 4 to rotate inside the decanting tank body 1 based on the water level change.

[0029] This embodiment designs a drainage volume maintenance component 4, which is fixed on the float assembly 2 and can rotate within the decanting tank body 1. This allows the two major factors affecting drainage volume—the area of ​​the drain outlet 31 and the height difference between the drain outlet 31 and the water surface—to change synchronously and inversely. That is, when the water level is high and the height difference between the drain outlet 31 and the water surface is large, the area of ​​the drain outlet 31 decreases; when the water level decreases and the height difference between the drain outlet 31 and the water surface decreases, the area of ​​the drain outlet 31 increases. Since the increase or decrease of the area of ​​the drain outlet 31 is synchronously and inversely linked with the change of the water level, the drainage volume of this application can be adaptively maintained within a certain range, which can effectively solve the problem that existing rotary decanters are difficult to adaptively adjust the drainage volume in response to changes in water level.

[0030] Specifically, in this embodiment, when the draft of the decanting tank body 1 is deep, the float assembly 2 is higher than the drain outlet 31. At this time, the drainage volume maintenance assembly 4 can be driven by the float assembly 2, making the other end of the drainage volume maintenance assembly 4 lower, i.e., the drain outlet 31 is lower. Since the width of the drain outlet 31 is constant, the area of ​​the drain outlet 31 is small when the draft of the decanting tank body 1 is deep. At this time, the height difference between the center of the drain outlet 31 and the water surface is large. As drainage continues, the water level decreases, and the draft of the decanting tank body 1 decreases. The height of the float assembly 2 decreases synchronously, which drives the drainage volume maintenance assembly 4 to rotate, thereby increasing the height of the drain outlet 31 and increasing the area of ​​the drain outlet 31. Therefore, this embodiment can, throughout the entire drainage process, for example... Figure 1 When the height difference between the water surface and the center of the drain outlet 31 is large, the height of the drain outlet 31 is h1, while the width of the drain outlet 31 remains unchanged. Therefore, a smaller drain outlet 31 area is achieved. Conversely, when the height difference between the water surface and the center of the drain outlet 31 is small, a larger drain outlet 31 area is achieved. Figure 2As shown, at this time, the position of the float assembly 2 decreases synchronously with the water level, and the height of the drain outlet 31 increases to h2. Since the width of the drain outlet 31 remains unchanged, a larger drain outlet 31 area can be achieved. According to the orifice outflow formula, the drainage flow rate is positively correlated with the area of ​​the drain outlet 31, and also positively correlated with the square root of the height difference between the center of the drain outlet 31 and the water surface. Therefore, during the drainage process, the continuous drop in water level, a negative feedback factor on the drainage volume, can be mitigated by the drainage volume maintenance component 4 driven by the float assembly 2. This negative feedback factor of water level drop will simultaneously bring about a positive feedback factor of increased drain outlet 31 area, achieving a reverse linkage between the two major drainage volume influencing factors. Thus, this embodiment can adaptively adjust and maintain the drainage volume within a certain range throughout the drainage process, avoiding excessive fluctuations in drainage volume. Therefore, this application can effectively solve the problem that existing rotary decanters are difficult to adaptively adjust the drainage volume in response to water level changes.

[0031] In this embodiment, a drainage trough body 3 is also provided inside the decanting trough body 1; The drainage volume maintenance component 4 includes a baffle plate body 42 rotatably connected to the decanting tank body 1 and an arc-shaped baffle plate 43. The end of the baffle plate body 42 away from the drainage tank body 3 is fixedly connected to the float assembly 2, and the arc-shaped baffle plate 43 is connected to the end of the baffle plate body 42 close to the drainage tank body 3, and the arc-shaped baffle plate 43 is slidably connected to the top of the drainage tank body 3. The center of the arc-shaped water baffle 43 coincides with the rotation axis of the water baffle.

[0032] In this embodiment, by setting up a drainage trough body 3 and an arc-shaped baffle plate 43, the water in the pool is prevented from being discharged between the arc-shaped baffle plate 43 and the top of the drainage trough body 3 after the decanting trough body 1 is completely submerged in the water. This prevents the reverse adjustment linkage of the two factors affecting the drainage volume, namely the area of ​​the drainage outlet 31 and the height of the drainage outlet 31 from the water surface, from failing.

[0033] In this embodiment, an arc-shaped notch 32 is also provided at the drain outlet 31 of the main body of the drainage trough 3. The center of the arc corresponding to the arc notch 32 coincides with the center of the arc corresponding to the arc of the arc of the arc baffle 43.

[0034] In this embodiment, the top of the drainage trough body 3 is also provided with an arc-shaped hole 33, and the arc-shaped baffle 43 is provided in the arc-shaped hole 33, and the center of the arc corresponding to the arc of the arc-shaped hole 33 coincides with the center of the arc corresponding to the arc of the arc of the arc-shaped baffle 43.

[0035] In this embodiment, an inverted pressure sensor 5 is provided at the top end of the drainage trough body 3 near the water baffle plate, and the signal acquisition end of the pressure sensor 5 protrudes downward from the top of the drainage trough body 3.

[0036] In this embodiment, by designing a pressure sensor 5, after the area of ​​the drain outlet 31 is increased to the maximum, a pressure signal can be applied to the pressure sensor 5 by the drainage volume maintenance component 4, thereby providing a data basis for the movement of the entire decanter and preventing the subsequent drainage volume from gradually decreasing.

[0037] Specifically, in this embodiment, an installation step 34 is provided at the top of the main body 3 of the drainage trough near the water baffle, and the pressure sensor 5 is embedded and fixed in the installation step 34; The top of the main body 3 of the drainage trough is also provided with a wire mounting hole 301; It also includes a wire cover plate 6 disposed between the decanting tank body 1 and the drainage tank body 3. The wire cover plate 6, the decanting tank body 1 and the drainage tank body 3 form a wire routing cavity 61. The signal wire of the pressure sensor 5 extends into the wire routing cavity 61 through the wire mounting hole 301.

[0038] In this embodiment, the pressure sensor 5 is embedded in the mounting step 34 and needs to be designed with a waterproof structure, such as a sealing ring, to prevent pool water from entering. The wire cover plate 6 provided in this embodiment can form a wire routing cavity 61, which can facilitate the transmission of pressure signals to the decanter controller. In this embodiment, a wireless signal transmission device can be provided to transmit the pressure signal to the decanter controller. In some embodiments, the signal can also be transmitted directly by wire.

[0039] In this embodiment, the water baffle body 42 includes a first plate 421 and a second plate 422 arranged in parallel, and a rotating cylinder 423. The first plate 421 and the second plate 422 are fixedly connected to the two ends of the rotating cylinder 423. The drainage volume maintenance component 4 also includes a support crossbar 41 with both ends fixed to the opposite end faces inside the decanting tank body 1, and a rotating cylinder 423 is fitted onto the support crossbar 41 and rotatably connected to it. The arc-shaped baffle plate 43 is fixedly connected to the end of the first plate 421 away from the rotating cylinder 423, and the end of the second plate 422 away from the rotating cylinder 423 is connected to the float assembly 2.

[0040] In this embodiment, the first plate 421, the second plate 422, and the rotating cylinder 423 can be formed by an integrated process. The material can be a material with high structural strength and light weight, such as high-strength acrylic sheet, or a metal material, such as steel. The specific material selection can be chosen by the technician according to the requirements, and will not be elaborated here.

[0041] In this embodiment, the ratio of the lengths of the second plate 422 and the first plate 421 is in the range of 1 to 2. In this embodiment, the ratio of the lengths of the first plate 421 and the second plate 422 needs to be designed according to parameters such as the size of the decanting tank body 1, the size of the drainage tank, and the draft of the float assembly 2.

[0042] In this embodiment, technicians can find the optimal ratio based on calibration. For example, after fixing the ratio of the first plate 421 and the second plate 422 to 1.4, the drainage volume is continuously measured, and the drainage volume change curve is calculated. Then, the ratio of the first plate 421 and the second plate 422 is fixed to another ratio, and the above continuous measurement of drainage volume is repeated to calculate the drainage volume change curve. The optimal ratio can then be selected. In some embodiments, technicians can also use the orifice outflow formula to perform drainage volume reference verification and maintain the flow rate within a certain range. That is, when the draft of the decanting tank body 1 is deep, the drainage flow rate is reduced by weakening the area of ​​the drain outlet 31. When the draft of the decanting tank body 1 is shallow, the drainage flow rate is compensated by increasing the area of ​​the drain outlet 31, thereby achieving the technical effect of the drainage flow rate fluctuating within a certain range.

[0043] In this embodiment, the drainage volume maintenance component 4 further includes multiple movable baffles 44 arranged at equal intervals; The main body of the decanting trough 1 is provided with multiple fixed baffles 12 arranged at equal intervals on the end face of the bottom of the decanting trough opening 101; The movable baffle 44 and the fixed baffle 12 are arranged alternately along the vertical projection. In this embodiment, the movable baffle 44 is arranged perpendicular to the second plate 422.

[0044] This embodiment, through the design of fixed baffle 12 and movable baffle 44, can achieve all-round scum blocking, and the float assembly 2 can also provide a certain scum blocking function. Therefore, it can realize the two-stage scum blocking concept of float assembly 2 achieving initial blocking and fixed baffle 12 and movable baffle 44 achieving secondary blocking, thus preventing the scum in the pool from being discharged.

[0045] In this embodiment, a buffer strip 11 is provided on the end face of the main body 1 of the decanting tank located at the bottom of the decanting tank opening 101; The fixed baffle 12 is disposed through the buffer strip 11; In this embodiment, since the projections of the movable baffle 44 and the fixed baffle 12 along the central axis of the float assembly 2 overlap when the height of the drain outlet 31 is at its lowest, the projections of the movable baffle 44 and the fixed baffle 12 along the central axis of the float assembly 2 will inevitably overlap when the height of the drain outlet 31 is at its highest. This ensures that during the entire drainage process, the scum must pass through the gap between the movable baffle 44 and the fixed baffle 12 before it can be discharged.

[0046] In this embodiment, the float assembly 2 includes a float body 21 and a connecting arm 22 rotatably connected to both ends of the float body 21. The end of the connecting arm 22 away from the float body 21 is rotatably connected to the end of the decanting tank body 1. The displacement maintenance component 4 is fixedly connected to the outer peripheral wall of the float body 21.

[0047] In this embodiment, the water baffle body 42 of the drainage volume maintenance component 4 is connected to the outer peripheral wall of the float body 21, and the water baffle body 42 is arranged radially parallel to the float body 21.

[0048] In this embodiment, the system also includes a horizontally arranged rotary tube assembly 8, multiple descending tubes 7, and a push rod mechanism 9 for installation on the edge of the pool. One end of the downcomer 7 is connected to the rotary pipe assembly 8, and the other end is connected to the decanting tank body 1; The push rod mechanism 9 has a push rod body 91 connected to the descending tube 7.

[0049] In this embodiment, the rotary tube assembly 8, push rod mechanism 9, downcomer 7 and other structures are existing structures and will not be described in detail here. In this embodiment, the downcomer 7 is connected to the side of the drainage trough body 3 away from the drain outlet 31, and the drainage trough body 3 is set at the bottom of the decanting trough body 1.

[0050] It is understood that the above embodiments are merely exemplary embodiments used to illustrate the principles of the present invention, and the present invention is not limited thereto. For those skilled in the art, various modifications and improvements can be made without departing from the spirit and essence of the present invention, and these modifications and improvements are also considered to be within the scope of protection of the present invention.

Claims

1. A water level adaptive decanter, comprising a decanting tank body (1) and a float assembly (2), characterized in that, It also includes a drainage volume maintenance component (4) that can adaptively adjust the height of the drain outlet (31) based on the draft of the decanter body (1). The drainage volume maintenance component (4) is installed inside the decanting tank body (1) and rotatably connected thereto. The end of the drainage volume maintenance component (4) away from the drain outlet (31) is fixedly connected to the float assembly (2). The float assembly (2) can drive the drainage volume maintenance component (4) to rotate inside the decanting tank body (1) based on the water level change.

2. The water level adaptive decanter according to claim 1, characterized in that, It also includes a drainage trough body (3) installed inside the decanting trough body (1); The drainage volume maintenance component (4) includes a baffle plate body (42) rotatably connected to the decanting tank body (1) and an arc-shaped baffle plate (43). The end of the baffle plate body (42) away from the drainage tank body (3) is fixedly connected to the float assembly (2), and the arc-shaped baffle plate (43) is connected to the end of the baffle plate body (42) close to the drainage tank body (3), and the arc-shaped baffle plate (43) is slidably connected to the top of the drainage tank body (3). The center of the arc-shaped water baffle (43) coincides with the rotation axis of the water baffle.

3. The water level adaptive decanter according to claim 2, characterized in that, An inverted pressure sensor (5) is provided at one end of the top of the drainage trough body (3) near the baffle plate. The signal acquisition end of the pressure sensor (5) protrudes downward from the top of the drainage trough body (3).

4. The water level adaptive decanter according to claim 3, characterized in that, The top of the main body of the drainage trough (3) near the water baffle is provided with an installation step (34), and the pressure sensor (5) is embedded and fixed in the installation step (34); The top of the drainage trough body (3) is also provided with a wire mounting hole (301). It also includes a wire cover plate (6) set between the decanting tank body (1) and the drainage tank body (3). The wire cover plate (6), the decanting tank body (1) and the drainage tank body (3) form a wire routing cavity (61). The signal wire of the pressure sensor (5) extends into the wire routing cavity (61) through the wire mounting hole (301).

5. A water level adaptive decanter according to claim 2, characterized in that, The main body (42) of the baffle plate includes a first plate (421) and a second plate (422) arranged in parallel, and a rotating cylinder (423). The first plate (421) and the second plate (422) are fixedly connected to the two ends of the rotating cylinder (423). The drainage volume maintenance component (4) also includes a support crossbar (41) with both ends fixed to the opposite end faces inside the decanter body (1), and a rotating cylinder (423) is fitted on the support crossbar (41) and rotatably connected to it; The arc-shaped baffle (43) is fixedly connected to the end of the first plate (421) away from the rotating cylinder (423), and the end of the second plate (422) away from the rotating cylinder (423) is connected to the float assembly (2).

6. A water level adaptive decanter according to claim 5, characterized in that, The ratio of the lengths of the second plate (422) to the lengths of the first plate (421) ranges from 1 to 2.

7. A water level adaptive decanter according to claim 2, characterized in that, The drainage volume maintenance component (4) also includes multiple movable baffles (44) arranged at equal intervals. The main body of the decanting trough (1) is provided with multiple fixed baffles (12) arranged at equal intervals on the end face of the bottom of the decanting trough opening (101); The movable baffle (44) and the fixed baffle (12) are arranged alternately along the vertical projection.

8. A water level adaptive decanter according to claim 7, characterized in that, The main body of the decanting trough (1) is provided with a buffer strip (11) on the end face at the bottom of the decanting trough opening (101); The fixed baffle (12) is set through the buffer strip (11); When the drain outlet (31) is at its lowest height, there is an overlap between the projections of the movable baffle (44) and the fixed baffle (12) along the central axis of the float assembly (2).

9. A water level adaptive decanter according to claim 1, characterized in that, The float assembly (2) includes a float body (21) and a connecting arm (22) rotatably connected to both ends of the float body (21). The end of the connecting arm (22) away from the float body (21) is rotatably connected to the end of the decanting tank body (1). The displacement maintenance component (4) is fixedly connected to the outer peripheral wall of the pontoon body (21).

10. A water level adaptive decanter according to claim 1, characterized in that, It also includes a horizontally arranged rotary tube assembly (8), multiple downpipes (7), and a push rod mechanism (9) for setting at the pool edge. One end of the downcomer (7) is connected to the rotary pipe assembly (8), and the other end is connected to the decanting tank body (1); The push rod mechanism (9) has a push rod body (91) connected to the downcomer tube (7).

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