Multi-stage ecological restoration device suitable for river sewage treatment

Abstract

The invention discloses a multi-stage ecological restoration device suitable for river sewage treatment, and relates to the technical field of sewage aeration treatment. The invention comprises two groups of connecting frames for connecting with a hull, and one end of the connecting frame is fixedly connected with a mobile bracket, a medicine storage box is arranged between the two groups of mobile brackets, and the mobile bracket is in an inverted U shape, and a cylinder is arranged on the outer surface of the upper end of the mobile bracket; the invention drives a shovel plate to rotate inside the bottom mud by a rotating roller, and while performing aeration on the bottom mud in a certain amount and improving the aeration effect, a large amount of bottom mud can be prevented from flowing with the river water, and pollutants in the aeration process can be prevented from causing strong pollution to the river water in a short time, and the shovel plate brings the bottom mud into the inside of a corresponding mixing tank during the rotation process, and the aeration nozzle sprays the air introduced into the inside of the air guide cavity into the inside of the corresponding mixing tank, and performs aeration operation on the bottom mud in a certain amount to ensure the treatment effect.

Description

Technical Field

[0001] The invention relates to the technical field of sewage aeration treatment, and in particular to a multi-stage ecological restoration device suitable for river sewage treatment. Background Art

[0002] Rivers are an indispensable element in the social and economic development of cities and are also the carriers of urban water systems. In the past, rivers and lakes played a greater role in the drainage and sewage disposal in urban economic development, and therefore accumulated a large amount of sediment, which in turn accumulated a large amount of harmful substances. The harmful substances are released into the water body with the changes in time, climate and hydrological environment, making the water body turbid, black and smelly, and seriously damaging the water ecological environment.

[0003] At present, the domestic river ecological management adopts dredging methods. In order to maintain the stability of the slopes on both sides of the riverbed, it is often impossible to completely dredge the bottom sediment. This part of the remaining bottom sediment becomes endogenous pollution in the river, which not only continuously releases toxic and harmful substances into the water body, but also produces a large amount of ammonia nitrogen and methane gas under the action of anaerobic bacteria, making the river water quality black and smelly again. Therefore, the water quality deteriorated again in a short time after the water was released into the river in the later period.

[0004] Therefore, it is necessary to promptly treat the residual sediment. However, in the prior art, aeration is usually performed in the water body or directly in the sediment. Aeration in the water body has little effect on the treatment and repair of endogenous pollution in the sediment. Aeration in the sediment will cause the air to float up quickly and will not diffuse evenly around the sediment. Therefore, the microorganisms in the sediment will not be in sufficient contact with the air, and there will be aeration dead corners.

[0005] In addition, the sewage is repaired by directly adding repair agents to the water body. However, since the water in the river is in a flowing state, the repair agent is lost with the water flow, resulting in the repair agent being unable to fully enter the bottom mud to repair the bottom mud.

[0006] Therefore, it is necessary to propose a multi-stage ecological restoration device suitable for river sewage treatment. Summary of the invention

[0007] The purpose of the present invention is to provide a multi-stage ecological restoration device suitable for river sewage treatment to solve the technical defects proposed by the background technology.

[0008] In order to achieve the above-mentioned purpose, the present invention adopts the following technical scheme: a multi-stage ecological restoration device suitable for river sewage treatment, comprising two groups of connecting frames for connecting to the hull, and one end of the connecting frame is fixedly connected to a mobile bracket, a medicine storage box is arranged between the two groups of the mobile brackets, and the mobile bracket is in an inverted U shape, a cylinder is arranged on the outer surface of the upper end of the mobile bracket, and the output end of the cylinder penetrates into the interior of the mobile bracket and is fixedly connected to a push rod, one end of the push rod is connected to the output end of the cylinder, and the other end is fixedly connected to a limit block, the limit block is movably connected to the mobile bracket, and the medicine storage box is fixedly connected between the two groups of limit blocks;

[0009] The lower end outer surface of the medicine storage box is fixedly connected with connecting plates near both sides, a rotating roller is arranged between the two groups of connecting plates, a motor is arranged at a position corresponding to the rotating roller on the outer surface of one side of the connecting plate of one group, and the output end of the motor passes through the connecting plate and is fixedly connected to the rotating roller, an air guide cavity is opened inside the rotating roller, and the air guide cavity is connected to the output end of the external aerator, and an aeration mechanism is arranged inside the rotating roller;

[0010] The medicine storage box is provided with a dosing assembly for adding a repair agent into the bottom mud, and the upper outer surface of the medicine storage box is provided with a cleaning mechanism for removing floating objects on the river surface.

[0011] Furthermore, the aeration mechanism includes a mixing tank, an aeration nozzle, and a shovel plate; the outer surface of the rotating roller is annular and has several groups of mixing tanks equidistantly arranged thereon, an aeration nozzle is provided on the inner side of each group of mixing tanks close to the air guide cavity, a protective cover is provided on the outside of the aeration nozzle, and the aeration nozzle is communicated with the air guide cavity, the inner surface of the mixing tank is hollow on the side away from the air guide cavity, and a shovel plate is fixedly connected to the outer surface of the rotating roller at the position corresponding to each group of mixing tanks.

[0012] Furthermore, the mixing tank is internally rotatably connected to a rotating rod, and the outer surface of the rotating rod is equidistantly fixedly connected to a plurality of stirring columns, the outer surface of the connecting plate corresponding to the motor is fixedly connected to an arc plate on the side close to the rotating roller, and the outer surface of the arc plate is equidistantly fixedly connected to a plurality of teeth, one end of the rotating rod passes through the rotating roller and is fixedly connected to a gear, and the gear is meshed with the teeth.

[0013] Furthermore, the dosing component includes a medicine storage cavity opened inside the medicine storage box, and a pump body is arranged inside the medicine storage cavity, and the lower end outer surface of the medicine storage box is provided with several groups of nozzles connected to the output end of the pump body, and the lower end outer surface of the medicine storage box is provided with a switch button for controlling the operating state of the pump body near one side.

[0014] Furthermore, the outer sleeve of the switch button is provided with a waterproof sleeve, the interior of the waterproof sleeve is movably connected with a movable column, and the movable column and the waterproof sleeve are sealed together, a spring is provided on the outer surface of the movable column at a position inside the waterproof sleeve, and one end of the spring is fixedly connected to the movable column, and the other end is fixedly connected to the waterproof sleeve.

[0015] Furthermore, the cleaning mechanism includes two groups of limit rods fixedly connected to the outer surface of the upper end of the medicine storage box near the two ends, and a movable frame is movably connected between the two groups of limit rods, and several groups of floating balls are arranged on the outer surface of the movable frame near the middle, a through hole is opened on the outer surface of one side of the movable frame, and a net bag is fixedly connected to the inside of the through hole, and the outer surface of the net bag is fixedly connected to the inner surface of the movable frame.

[0016] Furthermore, a feed port is provided on the side of the outer surface of the net bag corresponding to the through hole, and the feed port is recessed toward the inside of the net bag. The inner diameter of the feed port gradually decreases from the through hole toward the inside of the movable frame. A discharge port is provided on the outer surface of the lower end of the net bag. When cleaning, the discharge port is closed, and the floating ball is at the same height as the feed port.

[0017] In summary, due to the adoption of the above technical solution, the beneficial effects of the present invention are:

[0018] 1. In the present invention, the rotating roller drives the shovel plate to rotate inside the bottom mud, and while aerating the bottom mud in certain amount and improving the aeration effect, it can also prevent a large amount of bottom mud from flowing with the river water, and prevent the pollutants in the aeration process from causing strong pollution to the river water in a short time. In the process of rotation, the shovel plate brings the bottom mud into the inside of the corresponding mixing tank, and the aeration nozzle sprays the air introduced into the air guide cavity into the inside of the corresponding mixing tank to perform aeration operation on the bottom mud. In this process, the bottom mud is stirred by the rotating rod, so that the bottom mud can be fully contacted with the air, so that the microorganisms in the sludge and sewage can obtain sufficient oxygen supply, accelerate the growth and metabolism of microorganisms, promote the degradation of organic matter and the removal of pollutants, and avoid the occurrence of aeration dead corners;

[0019] 2. In the process of aerating the bottom mud by the dosing component of the present invention, when the mixing tank storing the bottom mud corresponds to the second nozzle, the repair agent inside the medicine storage box 3 is sprayed into the corresponding mixing tank through the second nozzle under the action of the pump body, and the rotating rod drives the stirring column on its surface to rotate under the drive of the gear, so as to stir the bottom mud and make the repair agent and the bottom mud evenly and fully mixed, thereby improving the sewage treatment effect. In addition, the cleaning mechanism can clean the floating objects on the surface of the river water while aerating and chemically repairing the riverbed mud, thereby realizing multi-stage synchronous ecological restoration operation of river sewage. BRIEF DESCRIPTION OF THE DRAWINGS

[0020] Figure 1 It is a schematic diagram of the overall structure of the present invention;

[0021] Figure 2 A combined view of the dosing assembly and the cleaning mechanism of the present invention;

[0022] Figure 3 For the present invention Figure 2 A magnified view of region A;

[0023] Figure 4 A combined view of the mixing tank and the rotating rod of the present invention;

[0024] Figure 5 For the present invention Figure 4 A magnified view of region B;

[0025] Figure 6 It is a structural schematic diagram of the aeration mechanism of the present invention;

[0026] Figure 7 This is a combined view of the net bag and the movable frame of the present invention.

[0027] Figure numerals: 1, connecting frame; 2, movable bracket; 3, medicine storage box; 4, cylinder; 5, push rod; 6, limit block; 7, aeration mechanism; 701, mixing tank; 702, aeration nozzle; 703, shovel plate; 704, rotating rod; 705, stirring column; 706, arc plate; 707, teeth; 708, gear; 8, dosing assembly; 801, pump body; 802, nozzle two; 803, switch button; 804, waterproof sleeve; 805, movable column; 806, spring; 807, medicine storage chamber; 9, cleaning mechanism; 901, limit rod; 902, movable frame; 903, floating ball; 904, net bag; 905, feed port; 906, discharge port; 10, connecting plate; 11, rotating roller; 12, motor; 13, air guide chamber. DETAILED DESCRIPTION

[0028] The following will be combined with the drawings in the embodiments of the present invention to clearly and completely describe the technical solutions in the embodiments of the present invention. Obviously, the described embodiments are only part of the embodiments of the present invention, not all of the embodiments. Based on the embodiments of the present invention, all other embodiments obtained by ordinary technicians in this field without creative work are within the scope of protection of the present invention.

[0029] Embodiment 1: Figure 1-6As shown, the multi-stage ecological restoration device suitable for river sewage treatment proposed by the present invention comprises two groups of connecting frames 1 for connecting with the hull, the connecting frame 1 is connected to the stern of the hull, and one end of the connecting frame 1 is fixedly connected with a movable bracket 2, a medicine storage box 3 is arranged between the two groups of movable brackets 2, and the movable bracket 2 is in an inverted U shape, and a cylinder 4 is arranged on the outer surface of the upper end of the movable bracket 2 to control the operation of the cylinder 4, and the output end of the cylinder 4 passes through the interior of the movable bracket 2 and is fixedly connected with a push rod 5, one end of the push rod 5 is connected to the output end of the cylinder 4, and the other end is fixedly connected to a limit block 6, the limit block 6 is movably connected to the movable bracket 2, and the medicine storage box 3 is fixedly connected between the two groups of limit blocks 6, and the limit block 6 drives the medicine storage box 3 to move to the bottom of the river channel under the push of the push rod 5 until;

[0030] The lower end outer surface of the medicine storage box 3 is fixedly connected with a connecting plate 10 near both sides, and a rotating roller 11 is arranged between the two groups of connecting plates 10, so that the shovel plate 703 at the bottom of the rotating roller 11 enters the bottom mud of the river channel, and the hull drives the connecting frame 1 to move in the river channel. A motor 12 is arranged on the outer surface of one side of a group of connecting plates 10 at a position corresponding to the rotating roller 11, and the output end of the motor 12 passes through the connecting plate 10 and is fixedly connected to the rotating roller 11. In the process of the medicine storage box 3 moving with the connecting frame 1, the motor 12 drives the rotating roller 11 to drive the shovel plate 703 to rotate inside the bottom mud, and an air guide cavity 13 is opened inside the rotating roller 11, and the air guide cavity 13 is connected to the output end of the external aerator, and an aeration mechanism 7 is arranged inside the rotating roller 11.

[0031] The aeration mechanism 7 includes a mixing tank 701, an aeration nozzle 702, and a shovel plate 703; the outer surface of the rotating roller 11 is annular and equidistantly provided with a plurality of groups of mixing tanks 701, and an aeration nozzle 702 is provided on the side of the interior of each group of mixing tanks 701 close to the air guide cavity 13, and a protective cover is provided on the outside of the aeration nozzle 702, and the aeration nozzle 702 is communicated with the air guide cavity 13, and the inner surface of the mixing tank 701 away from the air guide cavity 13 is hollow, and a shovel plate 703 is fixedly connected to the outer surface of the rotating roller 11 at a position corresponding to each group of mixing tanks 701, and the shovel plate 703 brings the bottom mud into the interior of the corresponding mixing tank 701 during the rotation process, and the aeration nozzle 702 sprays the air introduced into the air guide cavity 13 into the interior of the corresponding mixing tank 701, thereby performing aeration operation on the bottom mud. Compared with the prior art in which an aeration pipe is directly provided at the bottom of the river channel, the bottom mud can be more fully contacted with the air.

[0032] The interior of the mixing tank 701 is rotatably connected to a rotating rod 704, and the outer surface of the rotating rod 704 is fixedly connected to a plurality of groups of stirring columns 705 at equal distances. The outer surface of the connecting plate 10 corresponding to the motor 12 is fixedly connected to a curved plate 706 on the side close to the rotating roller 11, and the outer surface of the curved plate 706 is fixedly connected to a plurality of groups of teeth 707 at equal distances. One end of the rotating rod 704 penetrates the rotating roller 11 and is fixedly connected to a gear 708, and the gear 708 is meshed with the teeth 707. When the mixing tank 701 rotates to the upper side of the rotating roller 11, the gear 708 corresponds to the teeth 707, and the rotating roller 11 continues to rotate slowly. The rotating rod 704 drives the stirring columns 705 on its surface to rotate under the drive of the gear 708, thereby stirring the bottom mud so that the bottom mud can be fully in contact with the air.

[0033] Embodiment 2: Figure 1-3 As shown, the difference between this embodiment and embodiment 1 is that a dosing component 8 for adding a repair agent to the bottom mud is arranged inside the medicine storage box 3, and the dosing component 8 includes a medicine storage cavity 807 opened inside the medicine storage box 3, and a pump body 801 is arranged inside the medicine storage cavity 807, and a plurality of groups of nozzles 802 connected to the output end of the pump body 801 are arranged on the outer surface of the lower end of the medicine storage box 3, and a switch button 803 for controlling the operating state of the pump body 801 is arranged on the outer surface of the lower end of the medicine storage box 3 near one side.

[0034] The switch button 803 is externally sleeved with a waterproof sleeve 804, and the waterproof sleeve 804 is internally movably connected with a movable column 805. During the process of aerating the bottom mud, the shovel plate 703 repeatedly contacts the movable column 805. When the shovel plate 703 contacts and continuously rotates with the movable column 805, the movable column 805 is squeezed by the shovel plate 703 to squeeze the switch button 803 toward the inside of the waterproof sleeve 804, and the pump body 801 is running. Under the action of the pump body 801, the repair agent in the medicine storage box 3 is sprayed to the corresponding mixing tank 701 through the nozzle 2 802. Inside, the repair agent is sprayed in a targeted manner to reduce the waste of the repair agent, and the movable column 805 is sealed and connected to the waterproof sleeve 804. A spring 806 is arranged on the outer surface of the movable column 805 located inside the waterproof sleeve 804, and one end of the spring 806 is fixedly connected to the movable column 805, and the other end is fixedly connected to the waterproof sleeve 804. When the shovel plate 703 is separated from the movable column 805, the movable column 805 returns to its original state under the action of the spring 806, the switch button 803 is separated from the movable column 805, and the pump body 801 stops running.

[0035] Embodiment 3: Figure 1 , Figure 2 and Figure 7As shown, the difference between this embodiment and embodiment 1 and embodiment 2 is that a cleaning mechanism 9 for removing floating objects on the surface of the river channel is provided on the upper outer surface of the medicine storage box 3, and the cleaning mechanism 9 includes two groups of limiting rods 901 fixedly connected to the upper outer surface of the medicine storage box 3 near the two ends, and a movable frame 902 is movably connected between the two groups of limiting rods 901, and a plurality of groups of floating balls 903 are provided on the outer surface of the movable frame 902 near the middle. In the process of treating and repairing the bottom mud of the river channel, the movable frame 902 moves with the limiting rods 901, and the movable frame 902 floats in the river channel under the action of the floating balls 903, a through hole is opened on the outer surface of one side of the movable frame 902, and a net bag 904 is fixedly connected to the inside of the through hole, and the outer surface of the net bag 904 is fixedly connected to the inner surface of the movable frame 902.

[0036] A feed port 905 is provided on the side of the outer surface of the net bag 904 corresponding to the through hole, and the feed port 905 is recessed into the inside of the net bag 904. During the movement of the movable frame 902, floating objects on the surface of the river water enter the inside of the net bag 904 through the feed port 905. The inner diameter of the feed port 905 gradually decreases from the through hole toward the inside of the movable frame 902, so the floating objects will not be discharged through the feed port 905. A discharge port 906 is provided on the outer surface of the lower end of the net bag 904. During cleaning, after cleaning, the floating objects inside the net bag 904 are removed through the discharge port 906, and the discharge port 906 is closed. The floating ball 903 is at the same height as the feed port 905. Half of the feed port 905 is located inside the river water, and half is exposed to the outside of the river channel, thereby improving the comprehensiveness of the cleaning of floating objects.

[0037] The working process and principle of the present invention are as follows:

[0038] Step 1: First, connect the connecting frame 1 to the stern of the hull, and then control the cylinder 4 to operate. The limit block 6 drives the medicine storage box 3 to move to the bottom of the river channel under the push of the push rod 5, until the shovel plate 703 at the bottom of the rotating roller 11 enters the bottom mud of the river channel. At this time, the hull drives the connecting frame 1 to move in the river channel;

[0039] Step 2: When the medicine storage box 3 moves with the connecting frame 1, the motor 12 drives the rotating roller 11 to drive the shovel plate 703 to rotate inside the bottom mud, so as to aerate the bottom mud in proportion and improve the aeration effect. At the same time, it can also prevent a large amount of bottom mud from flowing with the river water, and prevent the pollutants in the aeration process from causing strong pollution to the river water in a short time. During the rotation process, the shovel plate 703 brings the bottom mud into the corresponding mixing tank 701, and the aeration nozzle 702 sprays the air introduced into the air guide cavity 13 into the corresponding mixing tank 701, so as to aerate the bottom mud in proportion.

[0040] Step 3: During the process of aerating the bottom mud, the shovel plate 703 repeatedly contacts the movable column 805. When the shovel plate 703 contacts the movable column 805 and keeps rotating, the movable column 805 is squeezed by the shovel plate 703 to squeeze the switch button 803 into the waterproof sleeve 804, and the pump body 801 runs. The repair agent in the medicine storage box 3 is sprayed into the corresponding mixing tank 701 through the nozzle 2 802 under the action of the pump body 801. When the mixing tank 701 rotates to the upper side of the rotating roller 11, the gear 708 corresponds to the tooth 707, and the rotating roller 11 keeps rotating slowly. The rotating rod 704 drives the stirring column 705 on its surface to rotate under the drive of the gear 708, thereby stirring the bottom mud, so that the bottom mud can fully contact with the air, and the repair agent and the bottom mud are evenly mixed. When the mixing tank 701 rotates to the lower side of the rotating roller 11, the repaired bottom mud falls to the bottom of the river again.

[0041] Step 4. During the process of treating and repairing the bottom mud of the river channel, the movable frame 902 moves with the limit rod 901, and the movable frame 902 floats in the river channel under the action of the floating ball 903, and the feed port 905 is half located inside the river water and half exposed outside the river channel. Therefore, during the movement of the movable frame 902, floating objects on the surface of the river water enter the net bag 904 through the feed port 905, and since the inner diameter of the feed port 905 gradually decreases from the through hole toward the inside of the movable frame 902, the floating objects will not be discharged through the feed port 905. After cleaning, the floating objects inside the net bag 904 are removed through the discharge port 906 for easy use next time.

[0042] 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. A multi-stage ecological restoration device suitable for river sewage treatment, comprising two sets of connecting frames (1) for connecting to a ship hull, wherein one end of the connecting frame (1) is fixedly connected to a movable bracket (2), characterized in that: A medicine storage box (3) is arranged between the two groups of movable brackets (2), and the movable bracket (2) is in an inverted U shape. A cylinder (4) is arranged on the outer surface of the upper end of the movable bracket (2), and the output end of the cylinder (4) penetrates into the interior of the movable bracket (2) and is fixedly connected to a push rod (5). One end of the push rod (5) is connected to the output end of the cylinder (4), and the other end is fixedly connected to a limit block (6). The limit block (6) is movably connected to the movable bracket (2), and the medicine storage box (3) is fixedly connected between the two groups of limit blocks (6); The lower end outer surface of the medicine storage box (3) is fixedly connected to a connecting plate (10) at positions near both sides, a rotating roller (11) is arranged between two groups of the connecting plates (10), a motor (12) is arranged at a position corresponding to the rotating roller (11) on the outer surface of one side of one group of the connecting plates (10), and the output end of the motor (12) passes through the connecting plate (10) and is fixedly connected to the rotating roller (11), an air guide cavity (13) is provided inside the rotating roller (11), and the air guide cavity (13) is connected to the output end of an external aerator, and an aeration mechanism (7) is arranged inside the rotating roller (11); The medicine storage box (3) is provided with a dosing assembly (8) for adding a repair agent into the bottom mud, and the upper outer surface of the medicine storage box (3) is provided with a cleaning mechanism (9) for removing floating objects on the river surface; The aeration mechanism (7) comprises a mixing tank (701), an aeration nozzle (702), and a shovel plate (703); the outer surface of the rotating roller (11) is annularly provided with a plurality of groups of mixing tanks (701) at equal intervals; an aeration nozzle (702) is provided on the inner side of each group of the mixing tanks (701) close to the air guide cavity (13); a protective cover is provided on the outer side of the aeration nozzle (702); the aeration nozzle (702) is communicated with the air guide cavity (13); the inner surface of the mixing tank (701) is hollowed out on the side away from the air guide cavity (13); and a shovel plate (703) is fixedly connected to the outer surface of the rotating roller (11) at a position corresponding to each group of the mixing tanks (701); The mixing tank (701) is rotatably connected to a rotating rod (704) inside, and the outer surface of the rotating rod (704) is fixedly connected to a plurality of stirring columns (705) at equal distances. The outer surface of the connecting plate (10) corresponding to the motor (12) is fixedly connected to an arc plate (706) on one side close to the rotating roller (11), and the outer surface of the arc plate (706) is fixedly connected to a plurality of teeth (707) at equal distances. One end of the rotating rod (704) passes through the rotating roller (11) and is fixedly connected to a gear (708), and the gear (708) is meshed with the teeth (707).

2. The multi-stage ecological restoration device suitable for river sewage treatment according to claim 1 is characterized in that: The dosing component (8) comprises a medicine storage chamber (807) opened inside the medicine storage box (3), and a pump body (801) is arranged inside the medicine storage chamber (807), and a plurality of groups of nozzles (802) connected to the output end of the pump body (801) are arranged on the outer surface of the lower end of the medicine storage box (3), and a switch button (803) for controlling the operating state of the pump body (801) is arranged near one side of the outer surface of the lower end of the medicine storage box (3).

3. The multi-stage ecological restoration device suitable for river sewage treatment according to claim 2 is characterized in that: The switch button (803) is externally sleeved with a waterproof sleeve (804), the interior of the waterproof sleeve (804) is movably connected with a movable column (805), and the movable column (805) and the waterproof sleeve (804) are sealedly connected, and a spring (806) is provided on the outer surface of the movable column (805) at a position inside the waterproof sleeve (804), and one end of the spring (806) is fixedly connected to the movable column (805), and the other end is fixedly connected to the waterproof sleeve (804).

4. The multi-stage ecological restoration device suitable for river sewage treatment according to claim 1 is characterized in that: The cleaning mechanism (9) comprises two groups of limit rods (901) fixedly connected to the outer surface of the upper end of the medicine storage box (3) near the two ends, and a movable frame (902) is movably connected between the two groups of limit rods (901), and a plurality of groups of floating balls (903) are arranged near the middle of the outer surface of the movable frame (902). A through hole is provided on the outer surface of one side of the movable frame (902), and a net bag (904) is fixedly connected to the inside of the through hole, and the outer surface of the net bag (904) is fixedly connected to the inner surface of the movable frame (902).

5. The multi-stage ecological restoration device suitable for river sewage treatment according to claim 4 is characterized in that: A feed port (905) is provided on the side of the outer surface of the net bag (904) corresponding to the through hole, and the feed port (905) is recessed into the inside of the net bag (904). The inner diameter of the feed port (905) gradually decreases from the through hole toward the inside of the movable frame (902). A discharge port (906) is provided on the outer surface of the lower end of the net bag (904). When cleaning, the discharge port (906) is closed. The floating ball (903) is at the same height as the feed port (905).

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