River ecological restoration dredging device for hydraulic engineering

Abstract

The application provides a river ecological restoration dredging device for hydraulic engineering and relates to the field of hydraulic engineering.The river ecological restoration dredging device comprises a dredger main body, a reamer bridge, a dredging reamer head, a dredging filter bin, a sewage pipeline, a conveying pipeline, a dredging filtering mechanism and a dredging efficiency increasing mechanism.The reamer bridge is hingedly connected to the front end of the dredger main body.The dredging reamer head is rotatably connected to the front end of the reamer bridge.The dredging filter bin is arranged at the rear of the dredger main body.The rear end of the conveying pipeline is arranged on the inner side of the dredging filter bin, and the front end of the conveying pipeline is connected with two groups of water inlet structures through a tee joint.The dredging filtering mechanism is arranged on the inner side of the dredging filter bin.The dredging efficiency increasing mechanism is arranged on the front end of the reamer bridge, which significantly improves the slurry pumping efficiency, avoids repeated dredging, greatly improves the overall dredging construction efficiency and solves the problem of residual mud on the dredging operation surface, which affects the overall dredging operation efficiency.

Description

Technical Field

[0001] This invention relates to the field of water conservancy engineering technology, and in particular to a river ecological restoration and dredging device for water conservancy projects. Background Technology

[0002] In water conservancy projects, river management and ecological restoration projects, cutter suction dredgers are the core equipment for river dredging and desilting. They can cut and break up the compacted mud on the riverbed by rotating the cutter head at the front end, and continuously pump and transport the mud in conjunction with negative pressure mud pumps and delivery pipelines. They have the characteristics of continuous operation and high dredging efficiency, and are widely used in dredging and management operations of various small and medium-sized rivers, lakes and reservoirs.

[0003] The existing publication number: CN117266285B discloses a cutter suction dredger, belonging to the field of dredging construction technology. It includes a connecting plate fixedly connected to the front of the dredger, a dredging pipeline axially penetrating the connecting plate and extending into the dredger, a pump structure providing negative pressure inside the dredging pipeline, and a rotary cutter head assembly rotatably positioned at the end of the dredging pipeline away from the connecting plate. The rotary cutter head assembly contains a drive component for rotating it. Through the rotary cutter head assembly of this invention, during the process of breaking up the soil, it can scrape up some flexible foreign objects such as garbage embedded in the soil, thereby achieving the effect of cleaning garbage from the bottom silt during dredging. This reduces the probability of the cutter head suction port being blocked by foreign objects and eliminates the need for frequent manual cleaning of the cutter head suction port, improving the efficiency of construction operations.

[0004] However, in existing cutter suction dredgers, the suction inlet of the mud conveying pipeline is mostly fixed inside the cutter head during river dredging operations. When the cutter head rotates and cuts and agitates the riverbed sediment, the centrifugal force of the cutter head and the disturbance of the water flow cause the dispersed silt and mud to spread to the outside of the cutter head. It is impossible for all of them to converge into the effective suction range of the conveying pipeline. As a result, the conveying pipeline cannot completely suck up the agitated silt. This not only easily causes sediment residue on the dredging surface, but also significantly reduces the mud suction efficiency, ultimately seriously affecting the overall dredging efficiency. Summary of the Invention

[0005] In view of this, the present invention provides a river ecological restoration and dredging device for water conservancy projects. This device enables efficient, environmentally friendly, and continuous operation of river dredging. The dredging and filtration mechanism allows for simultaneous sludge suction and impurity filtration. A rotating filter drum efficiently separates large particles such as branches and stones from the sludge, effectively preventing pipe blockage and wear, ensuring continuous and stable dredging operations. No separate pretreatment stage is required, significantly improving the continuity of dredging operations, reducing equipment maintenance costs and the difficulty of subsequent sludge disposal. The dredging efficiency enhancement mechanism uses an anti-diffusion hood to prevent secondary pollution caused by sludge diffusion at the source. A low-frequency biological repellent protects the biodiversity of aquatic life in the river. A pre-cutting disc breaks down long-fiber debris to reduce equipment failure rates. Simultaneously, a dynamic sweeping suction structure expands the suction range and eliminates suction blind spots, significantly improving sludge suction efficiency, avoiding repeated dredging, and greatly enhancing the overall dredging efficiency.

[0006] This invention provides a river ecological restoration and dredging device for water conservancy projects, specifically including a dredger body, a cutterhead bridge, a dredging cutter head, a dredging filter chamber, a sewage discharge pipe, a conveying pipe, a dredging filtration mechanism, and a dredging efficiency enhancement mechanism. The cutterhead bridge is hinged to the front end of the dredger body; the dredging cutter head is rotatably connected to the front end of the cutterhead bridge; the dredging filter chamber is located at the rear of the dredger body; one end of the sewage discharge pipe is located inside the dredging filter chamber, and the other end of the sewage discharge pipe is connected to a mud pump; the rear end of the conveying pipe is located inside the dredging filter chamber, and the front end of the conveying pipe is connected to two sets of water inlet structures via a tee; the dredging filtration mechanism is located inside the dredging filter chamber; and the dredging efficiency enhancement mechanism is located at the front end of the cutterhead bridge.

[0007] Furthermore, the dredging and filtration mechanism includes: a dredging and filtration support, a filter drum, and a filter drive motor; the dredging and filtration support is fixedly connected inside the dredging and filtration chamber; the filter drum is rotatably connected to the inner side of the dredging and filtration support, and the filter drum has a plurality of filter holes, with the rear end of the conveying pipe connected to the inlet of the filter drum; the filter drive motor is fixedly connected to the inner rear side of the dredging and filtration support, and the output shaft of the filter drive motor is coaxially fixedly connected to the filter drum.

[0008] Furthermore, the dredging efficiency enhancement mechanism includes: an efficiency enhancement fixing frame, a driving waterproof cover, and a biological repellent; the efficiency enhancement fixing frame is fixedly connected to the front end of the screed bridge; the driving waterproof cover is fixedly connected to the front end of the efficiency enhancement fixing frame; the biological repellent is also provided in two sets, and the two sets of biological repellents are respectively fixedly connected to the outside of the driving waterproof cover, and both sets of biological repellents are low-frequency acoustic transducer structures.

[0009] Furthermore, the dredging efficiency enhancement mechanism also includes: a folding fixing bracket, an anti-diffusion folding bracket, and an anti-diffusion cover; the folding fixing bracket is fixedly connected to the top of the efficiency enhancement fixing frame; the anti-diffusion folding bracket is hinged to the upper front end of the folding fixing bracket; the anti-diffusion cover is fixedly connected to the front end of the anti-diffusion folding bracket, and the anti-diffusion cover is positioned above the dredging cutter head, and the anti-diffusion cover is a tile-shaped wear-resistant flexible rubber material structure.

[0010] Furthermore, the dredging efficiency enhancement mechanism also includes: a folding support rod and a folding limiting member; the folding support rod is hinged to the upper outer side of the folding fixed bracket, and the upper end of the folding support rod is slidably connected to the inner side of the anti-diffusion folding bracket; the folding limiting member is hinged to the inner side of the anti-diffusion folding bracket, and a torsion spring structure is provided at the hinge position between the folding limiting member and the anti-diffusion folding bracket, and the rear end of the folding limiting member contacts the upper end of the folding support rod.

[0011] Furthermore, the dredging efficiency enhancement mechanism also includes an efficiency enhancement drive motor; the efficiency enhancement drive motor is fixedly connected to the inner side of the efficiency enhancement fixing frame.

[0012] Furthermore, the dredging efficiency enhancement mechanism also includes: an efficiency enhancement drive gear ring and an efficiency enhancement drive gear; the efficiency enhancement drive gear ring is rotatably connected to the inner side of the efficiency enhancement fixing frame; the efficiency enhancement drive gear is an incomplete gear structure, the efficiency enhancement drive gear is rotatably connected to the inner side of the efficiency enhancement fixing frame, the efficiency enhancement drive gear meshes with the efficiency enhancement drive gear ring, and the efficiency enhancement drive gear is coaxially fixedly connected to the output shaft of the efficiency enhancement drive motor.

[0013] Furthermore, the dredging efficiency enhancement mechanism also includes: an efficiency enhancement drive disc and an efficiency enhancement return spring; the efficiency enhancement drive disc is coaxially and fixedly connected to the front of the efficiency enhancement drive gear ring, and the two sets of water inlets at the front end of the conveying pipe are fixedly connected to the efficiency enhancement drive disc; one end of the efficiency enhancement return spring is fixedly connected to the efficiency enhancement drive disc, and the other end of the efficiency enhancement return spring is fixedly connected to the efficiency enhancement fixing frame.

[0014] Furthermore, the dredging efficiency enhancement mechanism also includes: a first cutting gear, a second cutting gear, and a third cutting gear; the first cutting gear is coaxially fixedly connected to the outside of the drive shaft of the dredging reamer head; the second cutting gear is connected to the inside of the drive waterproof cover via a bracket, and the second cutting gear meshes with the first cutting gear; the third cutting gear is rotatably connected to the front of the inner side of the drive waterproof cover, and the third cutting gear meshes with the second cutting gear, and the first cutting gear, the second cutting gear, and the third cutting gear are all bevel gear structures.

[0015] Furthermore, the dredging efficiency enhancement mechanism also includes a cutting disc; the cutting disc is coaxially and fixedly connected to the front of the third cutting gear. Beneficial effects

[0016] This invention, through the design of a dredging and filtration mechanism, achieves simultaneous operation of river silt agitation and suction with impurity filtration. After the dredging cutter head agitates the riverbed silt and sends it into the filter drum through the conveying pipe, the filter drum is rotated by the filter drive motor, simultaneously completing the efficient filtration and separation of large particles such as branches and stones in the silt. This not only effectively prevents hard impurities from entering subsequent sewage pipes and causing problems such as pipe blockage and wear, ensuring the continuous and stable operation of dredging operations and reducing equipment failure risks and maintenance costs, but also eliminates the need for a separate silt pretreatment stage and allows the impurity filtration process to be completed without interrupting the dredging operation. This significantly improves the continuity of river dredging operations and the overall construction efficiency, and also reduces the pretreatment difficulty for further harmless disposal of the silt.

[0017] This invention achieves ecological protection during river dredging operations through the design of a dredging efficiency-enhancing mechanism. The anti-diffusion cover design with a folding limiting structure forms an omnidirectional barrier against the spreading sludge generated by the rotating cutter head during dredging operations, confining high-concentration sludge within the work area. This prevents secondary pollution of the river caused by sludge spreading to surrounding water bodies from the source and provides a stable foundation for efficient sludge extraction. The accompanying low-frequency acoustic transducer-type biological repellent gently drives away aquatic organisms such as fish and shrimp around the work area in advance without causing harm, preventing accidental injury to aquatic life during dredging operations and effectively protecting river biodiversity. A pre-cutting working surface can be formed at the front end of the dredging cutter head to pre-cut and break down long-fiber debris such as branches and aquatic plants in the river. The crushing mechanism effectively prevents long-fiber debris from entangled in the dredging cutter head and clogging the conveying pipeline, significantly reducing the failure rate of dredging operations and ensuring continuous and stable operation. Through the intermittent meshing transmission of the incomplete gear and the enhanced drive gear ring, combined with the elastic reset structure of the enhanced reset spring, a single enhanced drive motor can drive the enhanced drive disc to achieve continuous and controllable reciprocating oscillation. This, in turn, drives the two sets of water inlets at the front end of the conveying pipeline to form a dynamic sweeping and suction working surface in the working area, greatly expanding the suction coverage and avoiding bottom mud residue caused by suction blind spots. At the same time, the dynamically oscillating water inlets can form a continuous turbulent suction effect, further improving the suction efficiency of high-concentration mud. No additional repeated dredging operations are required, greatly improving the overall construction efficiency of river dredging. Attached Figure Description

[0018] To more clearly illustrate the technical solutions of the embodiments of the present invention, the accompanying drawings of the embodiments will be briefly described below.

[0019] The accompanying drawings described below are only related to some embodiments of the invention and are not intended to limit the invention.

[0020] In the attached diagram: Figure 1This is a schematic diagram of the overall structure of the present invention.

[0021] Figure 2 This is a schematic diagram of the biological repellent device of the present invention.

[0022] Figure 3 This is a schematic diagram of the filter drum structure of the present invention.

[0023] Figure 4 This is a schematic diagram of the filter drive motor structure of the present invention.

[0024] Figure 5 This is a schematic diagram of the anti-diffusion shield structure of the present invention.

[0025] Figure 6 This is a schematic diagram of the folding limiting member structure of the present invention.

[0026] Figure 7 This is a schematic diagram of the efficiency-enhancing drive gear structure of the present invention.

[0027] Figure 8 This is a schematic diagram of the cutting disc structure of the present invention.

[0028] List of reference numerals 1. Dredger body; 101. Dredging and filter support; 102. Filter drum; 103. Filter drive motor; 2. Reamer bridge; 201. Enhanced fixing frame; 202. Drive waterproof cover; 203. Biological repellent; 204. Folding fixing frame; 205. Anti-diffusion folding frame; 206. Anti-diffusion cover; 207. Folding support link; 208. Folding limit component; 209. Enhanced drive motor; 3. Dredging reamer head; 4. Dredging and filter chamber; 5. Sewage discharge pipe; 6. Conveying pipe; 210. Enhanced drive gear ring; 211. Enhanced drive gear; 212. Enhanced drive disc; 213. Enhanced return spring; 214. First cutting gear; 215. Second cutting gear; 216. Third cutting gear; 217. Cutting disc. Detailed Implementation Example

[0029] Please refer to Figures 1 to 4 As shown: This invention provides a river ecological restoration and dredging device for water conservancy projects, comprising a dredger body 1, a cutterhead bridge 2, a dredging cutter head 3, a dredging filter chamber 4, a sewage discharge pipe 5, a conveying pipe 6, and a dredging and filtration mechanism; the cutterhead bridge 2 is hinged to the front end of the dredger body 1; the dredging cutter head 3 is rotatably connected to the front end of the cutterhead bridge 2; the dredging filter chamber 4 is located at the rear of the dredger body 1; one end of the sewage discharge pipe 5 is located inside the dredging filter chamber 4, and the other end of the sewage discharge pipe 5 is connected to a mud pump; the rear end of the conveying pipe 6 is located inside the dredging filter chamber 4, and the front end of the conveying pipe 6 is connected to two sets of water inlet structures via a tee; the dredging and filtration mechanism is located inside the dredging filter chamber 4.

[0030] The dredging and filtration mechanism includes: a dredging and filtration support 101, a filter drum 102, and a filter drive motor 103; the dredging and filtration support 101 is fixedly connected inside the dredging and filtration chamber 4; the filter drum 102 is rotatably connected to the inner side of the dredging and filtration support 101, and the filter drum 102 has several filter holes, with the rear end of the conveying pipe 6 connected to the inlet of the filter drum 102; the filter drive motor 103 is fixedly connected to the inner rear side of the dredging and filtration support 101, and the output shaft of the filter drive motor 103 is coaxially fixedly connected to the filter drum 102.

[0031] The specific usage and function of this embodiment are as follows: When treating river silt, the sludge shovel head 3 is activated, which stirs up the silt. The stirred-up silt is transported to the inside of the filter drum 102 through the conveying pipe 6. The filter drive motor 103 is activated, and the output shaft of the filter drive motor 103 rotates, driving the filter drum 102 to rotate. The rotation of the filter drum 102 achieves the filtration of branches, stones, etc. in the silt. The filtered silt is discharged through the sewage pipe 5. Example

[0032] like Figures 1 to 8 As shown: The present invention provides a river ecological restoration and dredging device for water conservancy projects. Based on the first embodiment, it also includes a dredging efficiency enhancement mechanism, which is set at the front end of the screed bridge 2.

[0033] The dredging efficiency enhancement mechanism includes: an efficiency enhancement fixing frame 201, a driving waterproof cover 202, and a biological repellent device 203; the efficiency enhancement fixing frame 201 is fixedly connected to the front end of the screed bridge 2; the driving waterproof cover 202 is fixedly connected to the front end of the efficiency enhancement fixing frame 201; two sets of biological repellent devices 203 are also provided, and the two sets of biological repellent devices 203 are respectively fixedly connected to the outside of the driving waterproof cover 202, and both sets of biological repellent devices 203 are low-frequency acoustic transducer structures.

[0034] The dredging efficiency enhancement mechanism also includes: a folding fixing bracket 204, an anti-diffusion folding bracket 205, and an anti-diffusion cover 206; the folding fixing bracket 204 is fixedly connected to the top of the efficiency enhancement fixing frame 201; the anti-diffusion folding bracket 205 is hinged to the upper front end of the folding fixing bracket 204; the anti-diffusion cover 206 is fixedly connected to the front end of the anti-diffusion folding bracket 205, and the anti-diffusion cover 206 is set above the dredging cutter head 3. The anti-diffusion cover 206 is a tile-shaped wear-resistant flexible rubber material structure.

[0035] The dredging efficiency enhancement mechanism also includes: a folding support link 207 and a folding limiting member 208; the folding support link 207 is hinged to the upper outer side of the folding fixed bracket 204, and the upper end of the folding support link 207 is slidably connected to the inner side of the anti-diffusion folding bracket 205; the folding limiting member 208 is hinged to the inner side of the anti-diffusion folding bracket 205, and a torsion spring structure is provided at the hinge position between the folding limiting member 208 and the anti-diffusion folding bracket 205, and the rear end of the folding limiting member 208 contacts the upper end of the folding support link 207.

[0036] The dredging efficiency enhancement mechanism also includes: an efficiency enhancement drive motor 209; the efficiency enhancement drive motor 209 is fixedly connected to the inner side of the efficiency enhancement fixing frame 201.

[0037] The dredging efficiency enhancement mechanism also includes: an efficiency enhancement drive gear ring 210 and an efficiency enhancement drive gear 211; the efficiency enhancement drive gear ring 210 is rotatably connected to the inner side of the efficiency enhancement fixing frame 201; the efficiency enhancement drive gear 211 is an incomplete gear structure, the efficiency enhancement drive gear 211 is rotatably connected to the inner side of the efficiency enhancement fixing frame 201, the efficiency enhancement drive gear 211 meshes with the efficiency enhancement drive gear ring 210, and the efficiency enhancement drive gear 211 is coaxially fixedly connected to the output shaft of the efficiency enhancement drive motor 209.

[0038] The dredging efficiency enhancement mechanism also includes: an efficiency enhancement drive disc 212 and an efficiency enhancement return spring 213; the efficiency enhancement drive disc 212 is coaxially fixedly connected to the front of the efficiency enhancement drive gear ring 210, and the two sets of water inlets at the front end of the conveying pipe 6 are fixedly connected to the efficiency enhancement drive disc 212; one end of the efficiency enhancement return spring 213 is fixedly connected to the efficiency enhancement drive disc 212, and the other end of the efficiency enhancement return spring 213 is fixedly connected to the efficiency enhancement fixing frame 201.

[0039] The dredging efficiency enhancement mechanism also includes: a first cutting gear 214, a second cutting gear 215, and a third cutting gear 216; the first cutting gear 214 is coaxially fixedly connected to the outside of the drive shaft of the dredging cutter head 3; the second cutting gear 215 is connected to the inside of the drive waterproof cover 202 through a bracket, and the second cutting gear 215 meshes with the first cutting gear 214; the third cutting gear 216 is rotatably connected to the front of the inner side of the drive waterproof cover 202, and the third cutting gear 216 meshes with the second cutting gear 215. The first cutting gear 214, the second cutting gear 215, and the third cutting gear 216 are all bevel gear structures.

[0040] The dredging efficiency enhancement mechanism also includes: a cutting disc 217; the cutting disc 217 is coaxially fixedly connected to the front of the third cutting gear 216.

[0041] The specific usage and function of this embodiment: According to the preset dredging depth, the anti-diffusion cover 206 is opened and adjusted to the correct position. The folding limiter 208 automatically engages under the action of the torsion spring, forming a locking support for the folding support rod 207, providing stable load-bearing capacity for the anti-diffusion folding bracket 205, and preventing displacement and shaking of the anti-diffusion cover 206 during operation. In non-operational states, the limiter can be released, and the anti-diffusion folding bracket 205 can be folded downwards for storage, without affecting the dredging vessel's navigation and shallow-water operations, and avoiding collisions and damage to underwater obstacles. When the dredging operation starts, the two sets of biological actuators 203 are activated simultaneously. In this embodiment, the biological actuator 203 adopts a low-frequency acoustic transducer structure, which can emit low-frequency acoustic waves of a set frequency to... The dredging cutter head 3 drives away aquatic organisms such as fish and shrimp around its working area without causing harm, thus avoiding accidental injury to aquatic life in the river during dredging operations. This effectively protects the biodiversity of the river and meets the environmental protection requirements of ecological dredging. The drive waterproof cover 202 is fixed to the front end of the efficiency-enhancing fixing frame 201, providing sealed waterproof protection for the transmission components inside. When the dredging cutter head 3 starts to rotate to cut the riverbed sediment, the first cutting gear 214, which is coaxially fixed to the outside of the drive shaft of the dredging cutter head 3, rotates synchronously. Through the three-stage bevel gear transmission structure formed by the sequentially meshing second cutting gear 215 and third cutting gear 216, the rotational power is reversed and transmitted, driving the cutting disc 217, which is coaxially fixed in front of the third cutting gear 216, to rotate synchronously at high speed. The rotating cutter head 3 forms a pre-cutting working surface at its front end, pre-cutting and breaking up long-fiber debris such as branches and aquatic plants in the river channel. This prevents long-fiber debris from entangled in the cutter head 3 and clogging the conveying pipe 6, significantly reducing the failure rate of the dredging operation. During the cutting of the bottom mud by the cutter head 3, the anti-diffusion cover 206 set above the cutter head 3 forms an all-directional enclosure to block the upward and outward diffusion of silt and mud generated by the rotation of the cutter head. This completely confines the high-concentration silt stirred up within the working area of ​​the cutter head 3, preventing secondary pollution of the river channel caused by the diffusion of silt to the surrounding water bodies. Simultaneously with the dredging operation, the efficiency-enhancing drive motor 209, fixed inside the efficiency-enhancing mounting frame 201, starts, driving the coaxially fixed efficiency-enhancing drive motor 209. The driving gear 211 rotates continuously. In this embodiment, the enhancement drive gear 211 is an incomplete gear structure. Through the intermittent meshing transmission between the enhancement drive gear 211 and the enhancement drive ring gear 210, and with the elastic return force of the enhancement return spring 213, the enhancement drive disk 212 is driven to achieve continuous reciprocating oscillation. When the toothed section of the enhancement drive gear 211 meshes with the enhancement drive ring gear 210, it drives the enhancement drive ring gear 210 and the coaxially fixed enhancement drive disk 212 to oscillate in the forward direction. At the same time, the enhancement return spring 213 is stretched to store energy. When the toothless section of the enhancement drive gear 211 rotates to the position corresponding to the enhancement drive ring gear 210, the meshing transmission between the two is disengaged, and the enhancement return spring 213 releases its elastic force to drive the enhancement drive disk 212 to oscillate in the reverse direction.This cycle enables the continuous and controllable reciprocating oscillation of the efficiency-enhancing drive disc 212. The two sets of water inlets at the front end of the conveying pipe 6, fixed to the efficiency-enhancing drive disc 212, form a dynamic sweeping and suction working surface within the working area of ​​the dredging cutter head 3 as the efficiency-enhancing drive disc 212 oscillates. This significantly expands the suction coverage area, avoiding bottom mud residue caused by suction blind spots. Simultaneously, the dynamically oscillating water inlets create a continuous turbulent suction effect, further improving the suction efficiency of high-concentration mud. No additional repeated dredging operations are required, greatly improving the overall dredging construction efficiency.

[0042] The following points should be noted in this article: 1. The accompanying drawings of this embodiment only involve the structures involved in this embodiment; other structures can refer to the general design.

[0043] 2. Where there is no conflict, this embodiment and the features in the embodiment can be combined with each other to obtain new embodiments.

[0044] The above are merely specific embodiments of the present invention, but the scope of protection of the present invention is not limited thereto. Any variations or substitutions that can be easily conceived by those skilled in the art within the technical scope disclosed in the present invention should be included within the scope of protection of the present invention. Therefore, the scope of protection of the present invention should be determined by the scope of the claims.

Claims

1. A river ecological restoration and dredging device for water conservancy projects, characterized in that: The dredger includes a main body (1), a cutterhead bridge (2), a dredging cutter head (3), a dredging filter chamber (4), a sewage discharge pipe (5), a conveying pipe (6), a dredging filtration mechanism, and a dredging efficiency enhancement mechanism. The cutterhead bridge (2) is hinged to the front end of the dredger main body (1). The dredging cutter head (3) is rotatably connected to the front end of the cutterhead bridge (2). The dredging filter chamber (4) is located at the rear of the dredger main body (1). One end of the sewage discharge pipe (5) is located inside the dredging filter chamber (4), and the other end of the sewage discharge pipe (5) is connected to a mud pump. The rear end of the conveying pipe (6) is located inside the dredging filter chamber (4), and the front end of the conveying pipe (6) is connected to two sets of water inlet structures via a tee. The dredging filtration mechanism is located inside the dredging filter chamber (4). The dredging efficiency enhancement mechanism is located at the front end of the cutterhead bridge (2).

2. The river ecological restoration and dredging device for water conservancy projects as described in claim 1, characterized in that: The dredging and filtration mechanism includes: a dredging and filtration support (101), a filter drum (102), and a filter drive motor (103); the dredging and filtration support (101) is fixedly connected inside the dredging and filtration chamber (4); the filter drum (102) is rotatably connected to the inner side of the dredging and filtration support (101), the filter drum (102) has a plurality of filter holes, and the rear end of the conveying pipe (6) is connected to the inlet of the filter drum (102); the filter drive motor (103) is fixedly connected to the inner rear side of the dredging and filtration support (101), and the output shaft of the filter drive motor (103) is coaxially fixedly connected to the filter drum (102).

3. The river ecological restoration and dredging device for water conservancy projects as described in claim 1, characterized in that: The dredging efficiency enhancement mechanism includes: an efficiency enhancement fixing frame (201), a driving waterproof cover (202), and a biological repellent device (203); the efficiency enhancement fixing frame (201) is fixedly connected to the front end of the screed bridge frame (2); the driving waterproof cover (202) is fixedly connected to the front end of the efficiency enhancement fixing frame (201); the biological repellent device (203) is also provided in two sets, and the two sets of biological repellent devices (203) are respectively fixedly connected to the outside of the driving waterproof cover (202), and both sets of biological repellent devices (203) are low-frequency acoustic transducer structures.

4. The river ecological restoration and dredging device for water conservancy projects as described in claim 3, characterized in that: The dredging efficiency enhancement mechanism also includes: a folding fixing bracket (204), an anti-diffusion folding bracket (205), and an anti-diffusion cover (206); the folding fixing bracket (204) is fixedly connected above the efficiency enhancement fixing frame (201); the anti-diffusion folding bracket (205) is hinged to the upper front end of the folding fixing bracket (204); the anti-diffusion cover (206) is fixedly connected to the front end of the anti-diffusion folding bracket (205), and the anti-diffusion cover (206) is set above the dredging cutter head (3), and the anti-diffusion cover (206) is a tile-shaped wear-resistant flexible rubber material structure.

5. The river ecological restoration and dredging device for water conservancy projects as described in claim 4, characterized in that: The dredging efficiency enhancement mechanism also includes: a folding support link (207) and a folding limiting member (208); the folding support link (207) is hinged to the upper outer side of the folding fixed bracket (204), and the upper end of the folding support link (207) is slidably connected to the inner side of the anti-diffusion folding bracket (205); the folding limiting member (208) is hinged to the inner side of the anti-diffusion folding bracket (205), and a torsion spring structure is provided at the hinge position between the folding limiting member (208) and the anti-diffusion folding bracket (205), and the rear end of the folding limiting member (208) contacts the upper end of the folding support link (207).

6. The river ecological restoration and dredging device for water conservancy projects as described in claim 5, characterized in that: The dredging efficiency enhancement mechanism also includes an efficiency enhancement drive motor (209); the efficiency enhancement drive motor (209) is fixedly connected to the inner side of the efficiency enhancement fixing frame (201).

7. The river ecological restoration and dredging device for water conservancy projects as described in claim 6, characterized in that: The dredging efficiency enhancement mechanism further includes: an efficiency enhancement drive gear ring (210) and an efficiency enhancement drive gear (211); the efficiency enhancement drive gear ring (210) is rotatably connected to the inner side of the efficiency enhancement fixing frame (201); the efficiency enhancement drive gear (211) is an incomplete gear structure, the efficiency enhancement drive gear (211) is rotatably connected to the inner side of the efficiency enhancement fixing frame (201), the efficiency enhancement drive gear (211) meshes with the efficiency enhancement drive gear ring (210), and the efficiency enhancement drive gear (211) is coaxially fixedly connected to the output shaft of the efficiency enhancement drive motor (209).

8. The river ecological restoration and dredging device for water conservancy projects as described in claim 7, characterized in that: The dredging efficiency enhancement mechanism also includes: an efficiency enhancement drive disc (212) and an efficiency enhancement reset spring (213); the efficiency enhancement drive disc (212) is coaxially fixedly connected to the front of the efficiency enhancement drive gear ring (210), and the two sets of water inlets at the front end of the conveying pipe (6) are fixedly connected to the efficiency enhancement drive disc (212); one end of the efficiency enhancement reset spring (213) is fixedly connected to the efficiency enhancement drive disc (212), and the other end of the efficiency enhancement reset spring (213) is fixedly connected to the efficiency enhancement fixing frame (201).

9. The river ecological restoration and dredging device for water conservancy projects as described in claim 8, characterized in that: The dredging efficiency enhancement mechanism further includes: a first cutting gear (214), a second cutting gear (215), and a third cutting gear (216); the first cutting gear (214) is coaxially fixedly connected to the outside of the drive shaft of the dredging reamer head (3); the second cutting gear (215) is connected to the inside of the drive waterproof cover (202) through a bracket, and the second cutting gear (215) meshes with the first cutting gear (214); the third cutting gear (216) is rotatably connected to the front of the inside of the drive waterproof cover (202), and the third cutting gear (216) meshes with the second cutting gear (215). The first cutting gear (214), the second cutting gear (215), and the third cutting gear (216) are all bevel gear structures.

10. The river ecological restoration and dredging device for water conservancy projects as described in claim 9, characterized in that: The dredging efficiency enhancement mechanism also includes a cutting disc (217); the cutting disc (217) is coaxially fixedly connected to the front of the third cutting gear (216).

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