Urban river sediment restoration treatment device and treatment method

Abstract

The invention belongs to the technical field of sludge remediation and treatment, and discloses an urban river sediment remediation and treatment device and method.The urban river sediment remediation and treatment device comprises a measuring ship, a towing bracket is installed at the bottom of the measuring ship, and a mounting plate is fixedly connected to the tail of the towing bracket; a plurality of slotting gears are mounted in the middle of the mounting plate, through cooperation of structures such as hook rakes, drum waist sleeves and shaft rods, the rotating hook rakes continuously fish out large stones in bottom mud to reach the surface of the drum waist sleeves with the high middle and the low two sides, meanwhile, the shaft rods generate extrusion force in reciprocating spiral grooves through round protruding blocks, and the large stones are driven by the shaft rods to rotate. The drum waist sleeve does axial reciprocating motion in the rotating process, stone is accelerated to be discharged to the two sides through slight axial vibration, and the raking depth is synchronously changed according to the adjusting depth of the towing bracket, so that the service life of the slotting gear is effectively prolonged, and the slotting gear is prevented from being abraded or deflected.

Description

Technical Field

[0001] This invention belongs to the field of sludge remediation and treatment technology, specifically a device and method for remediating and treating sediment in urban rivers. Background Technology

[0002] To alter the properties of bottom sediments and address water pollution, the remediation and treatment of urban river bottom sediments can enable efficient and precise measurement of the underwater topography of the river, accurately pinpoint pollution treatment areas for remediation, improve the types and community structure of microorganisms in the bottom sediment environment, and monitor changes in water quality indicators overlying the sediment.

[0003] The prior art document application number CN118954891B discloses an ecological restoration device for comprehensive river silt treatment and its construction method, comprising: a treatment platform, and a filter box and a piston cylinder fixedly installed on the treatment platform. An extraction pipe and a discharge pipe are fixed on the piston cylinder. A first rotating rod is rotatably installed at the bottom of the treatment platform, and multiple impellers evenly distributed on the first rotating rod are fixed thereon; a filter assembly is disposed within the filter box, and symmetrically arranged filter discs are connected to the filter assembly; a second rotating rod is rotatably installed on the piston cylinder, and an extraction assembly connected to the second rotating rod is disposed within the piston cylinder; a driven assembly is disposed on the filter assembly and connected to the second rotating rod; and a centrifugal control mechanism is disposed on the first rotating rod and connected to the driven assembly. The centrifugal control mechanism also has a transmission switching mechanism connected to the second rotating rod. This device can automatically switch the transmission mode according to the water flow impact force to increase energy utilization efficiency. Although the aforementioned device can automatically switch transmission modes according to the impact force of water flow to increase the efficiency of energy utilization, the current repair process requires the use of slotted gears to create grooves before laying hollow fiber filaments and aerating the bottom mud. The rotating gears can easily create grooves in the silt with almost no resistance and can push and avoid small stones, but they cannot avoid larger stones on the riverbed. The slotted gears cutting through the stones will significantly reduce the forward speed and wear down the slotted gears, which may also cause the forward direction to deviate, which is not conducive to the stable progress of the fiber laying process. Summary of the Invention

[0004] The purpose of this invention is to provide a device and method for the remediation and treatment of urban riverbed sediment that pre-screens out large stones in front of slotted gears, so as to solve the problems mentioned in the background art.

[0005] To achieve the above objectives, the present invention provides the following technical solution: a device for the remediation and treatment of sediment in urban river channels, comprising a surveying vessel, a tow rack installed on the bottom of the surveying vessel, an installation plate fixedly connected to the tail of the tow rack, a plurality of slotted gears installed in the middle of the installation plate, a baffle and a cloth-making plate fixedly connected to the side of the installation plate away from the surveying vessel, a plurality of cloth-making rubber wheels installed at the bottom of the cloth-making plate, the number of cloth-making rubber wheels being consistent with the number of slotted gears, and further comprising: A filter mechanism, wherein the filter mechanism is located on the side of the mounting plate closer to the measuring vessel; A feeding mechanism, which is connected to the filter stone mechanism; The stone filtering mechanism includes a first fixed plate fixed to the edge of the mounting plate. The lower end of the first fixed plate is rotatably connected to a shaft, and a drum-shaped sleeve is sleeved on the outer wall of the shaft. The stone filtering mechanism is located on the side of the mounting plate closer to the measuring vessel. Its main function is to screen large stones in the riverbed sediment. The drum-shaped sleeve is sleeved on the outer wall of the shaft. The rotation of the drum-shaped sleeve plays a role in vibration and screening during the cleaning process, ensuring that the stones are removed smoothly. The pushing mechanism is connected to the stone filtering mechanism and mainly assists in pushing the stones in the sediment along a predetermined path through a driving action.

[0006] Preferably, the filter mechanism further includes a reciprocating spiral groove formed in the middle of the drum sleeve, and the shaft abuts against the reciprocating spiral groove through a round protrusion.

[0007] Preferably, a protective shell is fixed to the bottom edge of the mounting plate, a drive motor is fixed to the inner cavity of the protective shell, a half gear is fixed to the output end of the drive motor, a second gear meshes with the outer wall of the half gear, the middle part of the second gear is fixed to the outer wall of the shaft, and the end of the shaft is rotatably connected to the bottom inner surface of the protective shell through a second fixing plate.

[0008] Preferably, the output end of the drive motor is further fixedly connected to a thick gear, the outer wall of the thick gear meshes with a first gear, and the side wall of the first gear is fixedly connected to a cylindrical sleeve.

[0009] Preferably, a pair of cylindrical sleeves are provided and are respectively fixed to both ends of the drum-shaped sleeve, and the outer wall of the cylindrical sleeve is slidably sleeved on the outer wall of the shaft.

[0010] Preferably, a number of curved hook rakes are fixedly connected at equal intervals on both sides of the drum-shaped sleeve, and the curved hook rakes on both sides are arranged in a centrally symmetrical manner. The spacing and number of the curved hook rakes are consistent with the arrangement of the slotted gears.

[0011] Preferably, the pushing mechanism includes a vertical plate fixed to the middle of the mounting plate, a slot is provided in the middle of the vertical plate, and a first plug is slidably sleeved in the middle of the vertical plate.

[0012] Preferably, a pair of push rods are rotatably connected to the bottom of the first plunger, and the ends of the push rods abut against the surface of the drum sleeve through figure-eight blocks, and the pair of push rods are elastically connected to each other.

[0013] Preferably, an eccentric wheel is slidably connected to the outer wall of the cylindrical sleeve, and a second plug is slidably connected to the outer wall of the eccentric wheel through an annular groove. A second sleeve is slidably sleeved on the outer wall of the second plug. A liquid passage groove is provided in the inner cavity of the mounting plate. The lower end of the liquid passage groove is connected to the second sleeve, and the upper end of the liquid passage groove is fixedly connected to a first sleeve through a water pipe. The first sleeve is slidably sleeved on the outer wall of the first plug.

[0014] This application also proposes a method for remediating and treating sediment in urban riverbeds, the method being as follows: S1. First, by measuring the positioning equipment and detectors installed on the ship, the device is driven to the polluted area, and then the self-made hydrophobic hollow fiber membrane module is laid on the bottom sediment riverbed. S2. Insert the hydrophobic hollow fiber membrane filaments into the filament board and place the entire set of equipment at the bottom of the riverbed. During the process of laying the hollow fiber filaments, the riverbed first uses the stone filter mechanism to rake out the large stones in front of the slotted gear, and then pushes them to both sides of the working area with the help of the pushing mechanism. The motor of the slotted gear is then started to rotate and slot the filaments. S3. The entire equipment is moved or changed direction by dragging the machine. The filament-laying device is inserted into the groove. The hydrophobic hollow fiber membrane is clamped by the filament-laying rubber wheel. The rotation speed of the filament-laying rubber wheel is controlled according to the filament-laying speed, and the filament-laying speed of the hollow fiber membrane is adjusted to lay the hollow fiber membrane in a reasonable depth of the bottom mud. S4. After the membrane is laid, a pressure gauge is connected to one end of the membrane module to adjust the aeration pressure inside the membrane, and an aeration pump is connected to the other end to provide aeration. A rotor flow meter is used to regulate the aeration volume and control the dissolved oxygen concentration.

[0015] Compared with the prior art, the beneficial effects of the present invention are as follows: This invention, through the coordinated structure of a hook rake, a drum-shaped sleeve, and a shaft, facilitates the removal of larger stones and their discharge to non-working areas. The rotating hook rake continuously scoops larger stones from the bottom mud, bringing them to the surface of the drum-shaped sleeve, which is higher in the center and lower on both sides. Simultaneously, the half-gear causes the shaft to rotate more rapidly and intermittently. Through the round protrusions, extrusion force is generated in the reciprocating spiral groove, causing the drum-shaped sleeve to move axially during rotation. This slight axial vibration accelerates the discharge of stones to both sides, while silt flows down from the gaps in the hook rake. Furthermore, the depth of the rake is adjusted synchronously according to the depth of the tow frame, thereby effectively extending the service life of the slotted gear and preventing wear or deflection of the slotted gear.

[0016] This invention, through the combination of a liquid channel, a push rod, and figure-eight blocks, facilitates providing an auxiliary thrust to the stone located in the middle of the drum-shaped sleeve. The eccentric wheel pushes the second stopper, and the liquid extrusion force pushes out the push rod below the first stopper, causing it to open to both sides. Under the tension of the central spring, the figure-eight blocks on both sides always abut against the surface of the drum-shaped sleeve, thus providing an auxiliary thrust to the stone falling in the middle, allowing the stone to slide smoothly to both sides and effectively improving the material feeding efficiency. Attached Figure Description

[0017] Figure 1 This is a top view of the structure of the present invention; Figure 2 This is a partial side view of the structure of the present invention; Figure 3 This is a schematic diagram showing the structural fit between the first fixing plate and the drum-shaped sleeve of the present invention; Figure 4 For the present invention Figure 3 A magnified view of the structure at point A in the middle; Figure 5 This is a schematic diagram showing the structural fit between the drum-shaped sleeve and the hook rake of the present invention; Figure 6 This is a schematic diagram of the side cross-section structure of the present invention; Figure 7 For the present invention Figure 6 A magnified schematic diagram of the structure at point B in the middle; Figure 8 For the present invention Figure 6 A magnified schematic diagram of the structure at point C in the middle; Figure 9 This is a schematic diagram showing the structural fit between the first gear and the thick gear of the present invention; Figure 10 This is a schematic diagram showing the structural fit between the shaft and the round protrusion of the present invention.

[0018] In the picture: 100. Surveying vessel; 200. Trailer; 300. Mounting plate; 400. Slotted gear; 500. Fabric plate; 600. Fabric rubber wheel; 700. Baffle; 800. Filter mechanism; 810. Protective shell; 820. First fixing plate; 830. Drum sleeve; 840. Curved hook rake; 850. Shaft; 860. Cylindrical sleeve; 870. First gear; 880. Second gear; 890. Thick gear; 810 0. Half gear; 8110. Drive motor; 8120. Second fixed plate; 8130. Round protrusion; 8140. Reciprocating spiral groove; 900. Pushing mechanism; 910. Vertical plate; 920. First sleeve; 930. Water pipe; 940. Push rod; 950. Eccentric wheel; 960. Second plunger; 970. Second sleeve; 980. First plunger; 990. Slot; 9100. Herringbone block; 9110. Liquid passage groove. Detailed Implementation

[0019] The technical solutions of the embodiments of the present invention will be clearly and completely described below with reference to the accompanying drawings. Obviously, the described embodiments are only some embodiments of the present invention, and not all embodiments. Based on the embodiments of the present invention, all other embodiments obtained by those skilled in the art without creative effort are within the scope of protection of the present invention.

[0020] like Figures 1 to 10 As shown, this invention provides a device for the remediation and treatment of sediment in urban riverbeds, including a surveying vessel 100. A tow rack 200 is mounted on the bottom of the surveying vessel 100. An mounting plate 300 is fixedly connected to the tail of the tow rack 200. Several slotted gears 400 are mounted in the middle of the mounting plate 300. A baffle 700 and a cloth-weaving plate 500 are fixedly connected to the side of the mounting plate 300 away from the surveying vessel 100. Several cloth-weaving rubber wheels 600 are mounted on the bottom of the cloth-weaving plate 500, and the number of cloth-weaving rubber wheels 600 is consistent with the number of slotted gears 400. The device also includes: The filter stone mechanism 800 is located on the side of the mounting plate 300 closest to the measuring vessel 100; The material pushing mechanism 900 is connected to the filter stone mechanism 800; The filter mechanism 800 includes a first fixing plate 820 fixed to the edge of the mounting plate 300. The lower end of the first fixing plate 820 is rotatably connected to a shaft 850, and a drum sleeve 830 is sleeved on the outer wall of the shaft 850.

[0021] The above scheme employs a method where the measuring vessel 100 is stably connected to and supports the device via a bottom trolley 200. A mounting plate 300 fixed to the tail of the trolley 200 provides a solid foundation for other mechanical components. Multiple slotted gears 400 are installed in the middle of the mounting plate 300. These slotted gears 400, in conjunction with cloth rollers 600, ensure that the cloth plate 500 can move along a predetermined track. The one-to-one correspondence between the cloth rollers 600 and the slotted gears 400 ensures the stability and synchronization of the device. During operation, the stone-filtering mechanism 800, located on the side of the mounting plate 300 closest to the measuring vessel 100, primarily screens large stones from the riverbed sediment. A drum-shaped sleeve 830 is fitted onto the outer wall of the shaft 850. The rotation of the drum-shaped sleeve 830 provides vibration and screening during the cleaning process, ensuring the smooth removal of stones. The material pushing mechanism 900 is connected to the stone filtering mechanism 800, and mainly assists in pushing the stones in the bottom sediment along a predetermined path through a driving action. The various components work together to form a highly efficient cleaning and repair system, enabling the bottom sediment repair process to proceed smoothly and efficiently.

[0022] like Figure 5 , Figure 6 , Figures 8 to 10 As shown, the filter mechanism 800 also includes a reciprocating spiral groove 8140 formed in the middle of the drum sleeve 830, and the shaft 850 abuts against the reciprocating spiral groove 8140 through a round protrusion 8130; a protective shell 810 is fixedly connected to the bottom edge of the mounting plate 300, a drive motor 8110 is fixedly connected to the inner cavity of the protective shell 810, a half gear 8100 is fixedly connected to the output end of the drive motor 8110, a second gear 880 meshes with the outer wall of the half gear 8100, the middle part of the second gear 880 is fixedly connected to the outer wall of the shaft 850, and the end of the shaft 850 is rotatably connected to the protective shell through a second fixing plate 8120. The bottom inner surface of 810; the output end of the drive motor 8110 is also fixedly connected to a thick gear 890, the outer wall of the thick gear 890 meshes with a first gear 870, and the side wall of the first gear 870 is fixedly connected to a cylindrical sleeve 860; a pair of cylindrical sleeves 860 are provided and are respectively fixedly connected to the two ends of the drum waist sleeve 830, and the outer wall of the cylindrical sleeve 860 is slidably sleeved on the outer wall of the shaft 850; several hook rakes 840 are fixedly connected at equal intervals on both sides of the drum waist sleeve 830, and the hook rakes 840 on both sides are centrally symmetrically arranged, and the spacing and number of hook rakes 840 are consistent with the arrangement of the slotted gear 400.

[0023] The above scheme employs a hook rake 840 positioned in front of the slotted gear 400. This allows small stones to be hooked out and pushed to one side in advance, reducing the workload of the slotted gear 400 and saving energy. After the measuring vessel 100 arrives at the polluted area, it first cleans the stones from the bottom mud. Through a precise mechanical structure and ingenious gear transmission system, the cleaning process is meticulously controlled, ensuring that each step is completed efficiently. During this process, the drive motor 8110 starts, driving the half gear 8100 and the thick gear 890 to rotate slowly and synchronously. The rotation of the thick gear 890 directly drives the synchronous rotation of the first gear 870. The first gear 870, through the cylindrical sleeve 860, further drives the rotation of the drum sleeve 830, causing the external hook rake 840 connected to the drum sleeve 830 to rotate synchronously. The hooked rake 840 effectively scoops up larger stones from the bottom mud and brings them to the surface of the drum-shaped sleeve 830. The drum-shaped sleeve 830 is designed with a higher center and lower sides; this structure allows larger stones to slide down the natural slope to the sides when they reach the surface. Simultaneously, the rotation of the shaft 850 causes the round protrusion 8130 to generate axial pressure along the reciprocating spiral groove 8140. This pressure not only accelerates the rotation of the drum-shaped sleeve 830 but also generates slight axial vibration during rotation. This vibration further accelerates the falling of stones from the bottom mud, optimizing stone distribution.

[0024] like Figures 4 to 7 As shown, the pushing mechanism 900 includes a vertical plate 910 fixed to the middle of the mounting plate 300. A slot 990 is provided in the middle of the vertical plate 910, and a first plug 980 is slidably sleeved in the middle of the vertical plate 910. A pair of pushing rods 940 are rotatably connected to the bottom of the first plug 980. The ends of the pushing rods 940 abut against the surface of the drum sleeve 830 through a figure-eight block 9100. The pair of pushing rods 940 are elastically connected to each other. The outer wall of the cylindrical sleeve 860 is slidably connected to... An eccentric wheel 950 is provided, and a second plug 960 is slidably connected to the outer wall of the eccentric wheel 950 through an annular groove. A second sleeve 970 is slidably sleeved on the outer wall of the second plug 960. A liquid passage groove 9110 is provided in the inner cavity of the mounting plate 300. The lower end of the liquid passage groove 9110 is connected to the second sleeve 970. The upper end of the liquid passage groove 9110 is fixedly connected to the first sleeve 920 through a water pipe 930. The first sleeve 920 is slidably sleeved on the outer wall of the first plug 980.

[0025] The above-mentioned solution works as follows: During the continued cleaning process, when the drum-shaped sleeve 830 rotates, it drives the eccentric wheel 950 to rotate synchronously. The rotation of the eccentric wheel 950 pushes the second plug 960, which slides along the edge, upward, thereby allowing the liquid in the liquid channel 9110 to flow into the first sleeve 920, generating pressure. As the liquid flows, the first plug 980 is squeezed downward, pushing the push rods 940 on both sides downward and opening to both sides. At this time, under the tension of the spring, the V-shaped blocks 9100 on both sides always remain in contact with the surface of the drum-shaped sleeve 830, playing an auxiliary pushing role. This pushing force ensures that the stones located in the middle of the drum-shaped sleeve 830 can slide smoothly to both sides. This not only improves the stone feeding efficiency but also avoids direct contact between the stones and the slotted gear 400 behind, thereby effectively reducing the wear and failure rate of the slotted gear 400.

[0026] This application also proposes a method for the remediation and treatment of sediment in urban riverbeds, the method of which is as follows: S1. First, by measuring the positioning equipment and detectors installed on the ship 100, the device is driven to the polluted area, and then the self-made hydrophobic hollow fiber membrane module is laid on the bottom sediment riverbed. S2. Insert the hydrophobic hollow fiber membrane filaments into the filament board 500, place the entire set of equipment at the bottom of the riverbed, and during the process of laying the hollow fiber filaments, the riverbed first uses the stone filter mechanism 800 to rake out the large stones in front of the slotted gear 400, and then uses the material pushing mechanism 900 to push them to both sides of the working area. Then, the motor of the slotted gear 400 is started to rotate and slot the filaments. S3. The entire equipment is moved or changed direction by dragging the machine. The filament-laying device is inserted into the groove. The hydrophobic hollow fiber membrane is clamped by the filament-laying rubber wheel 600. The rotation speed of the filament-laying rubber wheel 600 is controlled according to the filament-laying speed, and the filament-laying speed of the hollow fiber membrane is adjusted to lay the hollow fiber membrane in a reasonable depth of the bottom mud. S4. After the membrane is laid, a pressure gauge is connected to one end of the membrane module to adjust the aeration pressure inside the membrane, and an aeration pump is connected to the other end to provide aeration. A rotor flow meter is used to regulate the aeration volume and control the dissolved oxygen concentration.

[0027] Working principle and usage process of this invention: First, after the measuring vessel 100 arrives at the polluted area, the drive motor 8110 is started, driving the half gear 8100 and the thick gear 890 to rotate slowly and synchronously. When the thick gear 890 rotates, it can drive the first gear 870 to rotate synchronously, which in turn drives the drum sleeve 830 to rotate synchronously through the cylindrical sleeve 860. The drum sleeve 830 then drives the pair of external hook rakes 840 to rotate synchronously. During the rotation, the hook rakes 840 can rake out larger stones from the bottom mud and bring them to the surface of the drum sleeve 830. At this time, the half gear 8100 also reaches the surface of the second gear 880 and meshes, causing the shaft 850 to rotate. The gear density of the second gear 880 is less than that of the first gear 870, which makes the shaft 850 rotate faster. The shaft 850 generates a squeezing force in the reciprocating spiral groove 8140 through the round protrusion 8130, causing the drum sleeve 830 to move axially during the rotation, that is, to accelerate the falling of stones through slight axial vibration. The design of the drum waist sleeve 830, which is high in the middle and low on both sides, allows stones that reach the surface of the drum waist sleeve 830 to slide down the slope to both sides of the drum waist sleeve 830, so that larger stones can reach the non-working area, thereby avoiding the slotted gear 400 from cutting the stones and reducing its wear. Furthermore, when the drum-shaped sleeve 830 rotates, the eccentric wheel 950 can be driven to rotate synchronously. When the eccentric wheel 950 pushes the second stopper 960, which slides at the edge, upward, the liquid in the liquid channel 9110 is squeezed towards the first sleeve 920, causing the first stopper 980 to be squeezed downward. The first stopper 980 drives the push rods 940 on both sides to press down and open to both sides. Under the tension of the spring, the V-shaped blocks 9100 on both sides always abut against the surface of the drum-shaped sleeve 830, thus providing an auxiliary pushing force to the stone located in the middle of the drum-shaped sleeve 830, allowing the stone to slide smoothly to both sides and improving the material feeding efficiency. Conversely, when the eccentric wheel 950 drives the second stopper 960 downward, the first stopper 980 moves upward, pulling the push rods 940 on both sides closer to and retracting into the slots 990 of the vertical plate 910, without affecting the normal rotation of the hook rake 840.

[0028] It should be noted that, in this document, relational terms such as "first" and "second" are used only to distinguish one entity or operation from another, and do not necessarily require or imply any such actual relationship or order between these entities or operations. Furthermore, the terms "comprising," "including," or any other variations thereof are intended to cover non-exclusive inclusion, such that a process, method, article, or apparatus that comprises a list of elements includes not only those elements but also other elements not expressly listed, or elements inherent to such process, method, article, or apparatus.

[0029] Although embodiments of the invention have been shown and described, it will be understood by those skilled in the art that various changes, modifications, substitutions and alterations can be made to these embodiments without departing from the principles and spirit of the invention, the scope of which is defined by the appended claims and their equivalents.

Claims

1. A device for the remediation and treatment of sediment in urban riverbeds, comprising a surveying vessel (100), a tow rack (200) mounted on the bottom of the surveying vessel (100), an mounting plate (300) fixedly connected to the tail of the tow rack (200), a plurality of slotted gears (400) mounted in the middle of the mounting plate (300), a baffle (700) and a cloth-making plate (500) fixedly connected to the side of the mounting plate (300) away from the surveying vessel (100), a plurality of cloth-making rubber wheels (600) mounted on the bottom of the cloth-making plate (500), and the number of cloth-making rubber wheels (600) being consistent with the number of slotted gears (400), characterized in that: Also includes: A filter stone mechanism (800) is located on the side of the mounting plate (300) closer to the measuring vessel (100); A feeding mechanism (900) is connected to a filter stone mechanism (800); The filter stone mechanism (800) includes a first fixing plate (820) fixed to the edge of the mounting plate (300), and a shaft (850) is rotatably connected to the lower end of the first fixing plate (820). A drum-shaped sleeve (830) is sleeved on the outer wall of the shaft (850).

2. The urban riverbed sediment remediation and treatment device according to claim 1, characterized in that: The filter mechanism (800) also includes a reciprocating spiral groove (8140) opened in the middle of the drum sleeve (830), and the shaft (850) abuts against the reciprocating spiral groove (8140) through the round protrusion (8130).

3. The urban riverbed sediment remediation and treatment device according to claim 2, characterized in that: A protective shell (810) is fixed to the bottom edge of the mounting plate (300). A drive motor (8110) is fixed to the inner cavity of the protective shell (810). A half gear (8100) is fixed to the output end of the drive motor (8110). A second gear (880) meshes with the outer wall of the half gear (8100). The middle part of the second gear (880) is fixed to the outer wall of the shaft (850). The end of the shaft (850) is rotatably connected to the bottom inner surface of the protective shell (810) through a second fixing plate (8120).

4. The urban riverbed sediment remediation and treatment device according to claim 3, characterized in that: The output end of the drive motor (8110) is also fixedly connected to a thick gear (890), the outer wall of the thick gear (890) is meshed with a first gear (870), and the side wall of the first gear (870) is fixedly connected to a cylindrical sleeve (860).

5. The urban riverbed sediment remediation and treatment device according to claim 4, characterized in that: A pair of cylindrical sleeves (860) are provided and are respectively fixed to both ends of the drum waist sleeve (830). The outer wall of the cylindrical sleeve (860) is slidably sleeved on the outer wall of the shaft (850).

6. The urban riverbed sediment remediation and treatment device according to claim 5, characterized in that: Several curved hook rakes (840) are fixedly connected at equal intervals on both sides of the drum waist sleeve (830), and the curved hook rakes (840) on both sides are arranged in a centrally symmetrical manner. The spacing and number of the curved hook rakes (840) are consistent with the arrangement of the slotted gear (400).

7. The urban riverbed sediment remediation and treatment device according to claim 6, characterized in that: The pushing mechanism (900) includes a vertical plate (910) fixed to the middle of the mounting plate (300), a slot (990) is provided in the middle of the vertical plate (910), and a first plug (980) is slidably sleeved in the middle of the vertical plate (910).

8. The urban riverbed sediment remediation and treatment device according to claim 7, characterized in that: The bottom of the first plunger (980) is rotatably connected to a pair of push rods (940). The ends of the push rods (940) are all abutted against the surface of the drum sleeve (830) through the figure-eight block (9100). The pair of push rods (940) are elastically connected to each other.

9. The urban riverbed sediment remediation and treatment device according to claim 8, characterized in that: An eccentric wheel (950) is slidably connected to the outer wall of the cylindrical sleeve (860). A second plug (960) is slidably connected to the outer wall of the eccentric wheel (950) through an annular groove. A second sleeve (970) is slidably sleeved on the outer wall of the second plug (960). A liquid passage groove (9110) is provided in the inner cavity of the mounting plate (300). The lower end of the liquid passage groove (9110) is connected to the second sleeve (970). The upper end of the liquid passage groove (9110) is fixedly connected to the first sleeve (920) through a water pipe (930). The first sleeve (920) is slidably sleeved on the outer wall of the first plug (980).

10. A method for remediating and treating sediment in urban riverbeds, applied to the urban riverbed sediment remediation and treatment device as described in claim 1, characterized in that: The governance method is as follows: S1. First, by measuring the positioning equipment and detectors installed on the ship (100), the device is driven to the polluted area, and then the self-made hydrophobic hollow fiber membrane module is laid on the bottom sediment riverbed. S2. Insert the hydrophobic hollow fiber membrane filaments into the filament board (500), place the entire set of equipment at the bottom of the riverbed, and during the process of laying the hollow fiber filaments, the riverbed first uses the stone filter mechanism (800) to rake out the large stones in front of the slotted gear (400), and then uses the material pushing mechanism (900) to push them to both sides of the working area. Then, the motor of the slotted gear (400) is started to rotate and slot the filaments. S3. The entire equipment is moved or changed direction by dragging the machine. The filament device is inserted into the groove and the hydrophobic hollow fiber membrane is clamped by the filament rubber wheel (600). The filament rubber wheel (600) controls the rotation speed according to the filament movement speed, adjusts the filament speed of the hollow fiber membrane, and lays the hollow fiber membrane in a reasonable depth of bottom mud. S4. After the membrane is laid, a pressure gauge is connected to one end of the membrane module to adjust the aeration pressure inside the membrane, and an aeration pump is connected to the other end to provide aeration. A rotor flow meter is used to regulate the aeration volume and control the dissolved oxygen concentration.

Images