Underwater dredging robot

Abstract

The utility model discloses an underwater dredging robot, and relates to the technical field of underwater dredging. The device comprises an underwater working vehicle, a supporting plate is arranged on the upper side of the underwater working vehicle, an anti-fouling box is arranged on one side of the supporting plate, a driving assembly is arranged in the anti-fouling box, and two edge rods are arranged at the output end of the driving assembly; an equipment groove is formed in one side of the underwater operation vehicle, a first motor is arranged between the two sides of the equipment groove, four rolling wheels are rotationally matched, an output shaft of the first motor is fixedly connected with a screw rod, and a lifting plate is slidably matched in the equipment groove and movably matched with an antifouling rubber belt. The first motor drives the screw rod to drive the lifting plate to move up and down along the equipment groove, the antifouling rubber belt winds around the four rolling wheels to form a closed-loop protection structure, the first motor and the screw rod are effectively isolated from being in contact with external silt, meanwhile, the antifouling box is used for carrying out silt prevention protection on the driving assembly, and the overall durability of the robot is improved.

Description

Technical Field

[0001] This utility model belongs to the field of underwater dredging, specifically, it relates to an underwater dredging robot. Background Technology

[0002] The underwater dredging robot is an intelligent and automated underwater operation device designed specifically for cleaning silt, mud, aquatic plants and other sediments in water bodies.

[0003] Chinese Patent No. CN217325576U discloses an underwater dredging robot, comprising: an underwater work vehicle, on which a motor bracket and a support plate are provided. The motor bracket is fixed to the right side of the front end of the top of the underwater work vehicle by screws, and a waterproof motor is fixed to the middle of the top of the motor bracket by screws. The support plate is fixed to the front end of the top of the underwater work vehicle by screws, and the support plate is provided with a transmission gear and a shaft hole. The transmission gear is symmetrically interference-fitted to the two sides of the middle of the top of the support plate by bearings, and the shaft hole is symmetrically opened on both sides of the support plate.

[0004] The underwater dredging robot disclosed in the application has its transmission gear meshing area and the threaded connection between the transmission screw and the adjustment frame directly exposed to the underwater environment without protection. During long-term operation, it is easily invaded by silt and sand, causing jamming and severe wear, which will affect the stability of the transmission. Utility Model Content

[0005] The technical problem to be solved by this utility model is to overcome the shortcomings of the existing technology and provide an underwater dredging robot that solves the problems mentioned in the background technology.

[0006] To solve the above-mentioned technical problems, the basic concept of the technical solution adopted by this utility model is as follows:

[0007] An underwater dredging robot includes: an underwater working vehicle, a support plate mounted on the upper side of the underwater working vehicle, a dirt-proof box mounted on one side of the support plate, a drive component installed inside the dirt-proof box, and two ribs installed at the output end of the drive component, the ribs being rotatably engaged with the lower side of the dirt-proof box;

[0008] The underwater work vehicle has an equipment trough on one side. A motor is installed between the two sides of the equipment trough, and four rollers are rotatably connected to it. The output shaft of the motor is fixedly connected to a screw. A lifting plate is slidably connected inside the equipment trough, and an anti-fouling rubber belt is movably connected. The lifting plate is threaded around the screw. One end of the anti-fouling rubber belt is installed on the lower side of the lifting plate, and the other end passes around the four rollers and is installed on the upper side of the lifting plate. The anti-fouling rubber belt is located around the motor and the screw. A support frame is installed on one side of the lifting plate. The support frame is slidably connected to one side of the underwater work vehicle. Two dredging components are rotatably connected on the support frame. The dredging components are slidably connected to the circumference of the rib.

[0009] Optionally, two scraping blocks are installed between the two sides of the equipment trough. The two scraping blocks are installed on the upper and lower sides of the equipment trough respectively. The scraping blocks are located at the opening of the equipment trough, and the lifting plate is located between the upper and lower scraping blocks. The scraping blocks are in contact with the outer surface of the anti-fouling rubber belt.

[0010] Optionally, baffles are provided on both sides of the equipment trough, and grooves are provided on both sides of the lifting plate. The grooves extend vertically through the lifting plate, and the baffles extend vertically through the grooves. The distance between the two baffles is less than the width of the anti-fouling rubber belt. The baffles are located between two rollers near the opening of the equipment trough.

[0011] Optionally, the support frame includes a horizontal extension plate installed on one side of the lifting plate, two vertical extension plates installed on one side of the horizontal extension plate, and two connecting plates installed on one side of the vertical extension plate. The vertical extension plates are located between the horizontal extension plates and the connecting plates, and the sludge removal component is rotatably fitted between the upper and lower connecting plates.

[0012] Optionally, two reinforcing ribs are installed on the side of the vertical extension plate away from the connecting plate, and the two reinforcing ribs are installed on the upper and lower sides of the horizontal extension plate respectively. Two reinforcing ribs are installed on the side of the support plate away from the anti-fouling box, and the two reinforcing ribs are installed on the upper side of the underwater operation vehicle.

[0013] Optionally, the dredging component includes a sleeve adapted to the rib, the sleeve slidingly fitting around the rib, one end of a connecting plate being fitted around the sleeve, and multiple arc-shaped dredging blades welded to the side of the sleeve, the arc-shaped dredging blades being located between the upper and lower connecting plates.

[0014] Optionally, two bearings are installed around the sleeve, the arc-shaped dredging knife is located between the upper and lower bearings, one end of the connecting plate is installed around the bearing, two bearing seats are installed on the lower part of one side of the underwater operation vehicle, the lower end of the rib is set in the first bearing seat, a second bearing seat is installed between the two sides of the equipment slot, the lower end of the screw is set in the second bearing seat, four stabilizing columns are installed between the two sides of the equipment slot, bearings are installed around the stabilizing columns, and rollers are installed around the bearings.

[0015] Optionally, the drive assembly includes a motor 2 mounted on the upper side of the inner wall of the anti-fouling box, a gear 1 and two gears 2 rotatably engaged on the lower side of the inner wall of the anti-fouling box, a gear 3 fixedly connected to the output shaft of the motor 2 and meshing with the gear 1, the two gears 2 meshing with the gear 1 and gear 3 respectively, a rotating shaft provided on the lower end face of the gear 2, the rotating shaft extending to the outside of the anti-fouling box, a rib welded to the lower end face of the rotating shaft, a slot corresponding to the rotating shaft provided on the lower side of the anti-fouling box, a bearing 3 mounted around the slot, the bearing 3 mounted around the rotating shaft, a protrusion provided on the lower side of the inner wall of the anti-fouling box, a bearing 4 mounted around the protrusion, and gear 1 mounted around the bearing 4.

[0016] By adopting the above technical solution, the present invention has the following beneficial effects compared with the prior art. Of course, any product implementing the present invention does not necessarily need to achieve all of the following advantages at the same time:

[0017] The motor drives the screw to move the lifting plate up and down along the equipment slot. Combined with the anti-fouling rubber belt that wraps around four rollers to form a closed-loop protection structure, the motor and screw are effectively isolated from external mud and sand. At the same time, the anti-fouling box protects the drive components from mud and sand, improving the overall durability of the robot. The height of the dredging component is adjusted synchronously with the lifting plate by the support frame, reducing the risk of blind spots caused by changes in the depth of silt accumulation. The movement function of the underwater vehicle and the rotation design of the linkage rod of the drive component facilitate the sliding and rotation of the dredging component around the rod, achieving dynamic dredging coverage.

[0018] The specific embodiments of this utility model will be described in further detail below with reference to the accompanying drawings. Attached Figure Description

[0019] The accompanying drawings described below are merely some embodiments. Those skilled in the art can obtain other drawings based on these drawings without any creative effort.

[0020] In the picture:

[0021] Figure 1 This is a schematic diagram of the three-dimensional structure;

[0022] Figure 2 This is a schematic diagram of the cross-sectional structure;

[0023] Figure 3 This is a schematic diagram of the internal structure of the anti-fouling box.

[0024] The attached diagram lists the components represented by each number as follows:

[0025] 1. Underwater operation vehicle, 101. Baffle bar, 2. Support plate, 3. Anti-fouling box, 4. Motor 2, 401. Gear 3, 5. Gear 1, 6. Rib, 7. First bearing seat, 8. Sleeve, 9. Arc-shaped sludge removal knife, 901. Lifting plate, 10. Horizontal extension plate, 1001. Vertical extension plate, 1002. Connecting plate, 1003. Motor 1, 11. Screw, 1101. Roller, 12. Anti-fouling rubber belt, 13. Sludge scraper block, 14.

[0026] It should be noted that these accompanying drawings and textual descriptions are not intended to limit the scope of the present invention in any way, but rather to illustrate the concept of the present invention to those skilled in the art by referring to specific embodiments. Detailed Implementation

[0027] The technical solutions of the present utility model will be clearly and completely described below with reference to the accompanying drawings of the embodiments. Obviously, the described embodiments are only some embodiments of the present utility model, and not all embodiments. Based on the embodiments of the present utility model, all other embodiments obtained by those of ordinary skill in the art without creative effort are within the protection scope of the present utility model.

[0028] To make the above-mentioned objectives, features and advantages of this utility model more apparent and understandable, the utility model will be further described in detail below with reference to the accompanying drawings and specific embodiments.

[0029] Underwater dredging robots, as automated equipment specifically designed to remove silt, sediment, and impurities from the bottom of water bodies, have been widely used in recent years in fields such as river management, reservoir maintenance, port dredging, and urban drainage system maintenance. These devices typically combine the mobility of underwater work platforms, the dredging function of mechanical structures, and sealed protective designs to adapt to complex underwater environments. From the perspective of current technology, underwater dredging robots can be categorized into mechanical, pump-suction, and hybrid types based on their operating methods. Mechanical dredging robots primarily use rotating blades, scrapers, or buckets to directly agitate, cut, or grab silt, suitable for cleaning harder or larger particles of sediment. Pump-suction robots use negative pressure suction devices to mix silt with water and transport it to surface treatment equipment, suitable for handling loose, fine-particle silt. Hybrid robots integrate mechanical crushing and pumping functions, catering to various working conditions, but their structure is more complex, and maintenance costs are relatively higher.

[0030] In terms of basic structural design, existing underwater dredging robots typically include a mobile chassis, a power system, a dredging actuator, and protective components. The mobile chassis often employs a tracked or wheeled structure. Tracked designs reduce sinking into soft riverbeds by increasing the contact area, but they have limitations in steering flexibility and adaptability to complex terrain. Wheeled structures achieve flexible movement through independent drive wheels or omnidirectional wheels, but require a high degree of riverbed flatness. Early power systems primarily used hydraulic drives, with underwater motors driving hydraulic pumps for power. However, these systems have stringent sealing requirements and are prone to malfunctions due to leaks. In recent years, electric direct-drive technology has become increasingly popular, using waterproof motors to directly drive the dredging mechanism or moving parts, resulting in a more compact structure and easier maintenance. The dredging actuators are designed in various ways, such as a rotary cutterhead cutting silt at high speed, a scraper removing surface sediment through reciprocating motion, or a robotic arm carrying a bucket for targeted cleaning. Protective components focus on sealing critical components and preventing mud and sand intrusion, such as using rubber seals to protect bearings and using anti-fouling covers to isolate motors. However, there is still a risk of mud and sand seeping in and causing components to jam during long-term operation.

[0031] In existing technologies, the height adjustment function of dredging robots mostly relies on hydraulic cylinders or linear guides. For example, some devices use hydraulic cylinders to drive the dredging mechanism vertically up and down, but the hydraulic system is susceptible to pressure changes underwater and there is a risk of seal failure. Other designs use a mechanical lifting structure with a screw and nut, where a motor drives the screw to rotate and move the dredging mechanism up and down. This method is simple in structure and has high positioning accuracy, but the screw is easily covered by silt when exposed to the underwater environment, leading to thread wear or jamming. To address this issue, a few solutions have attempted to add a protective cover to the outside of the screw, but there are still gaps in the dynamic fit between the cover and the lifting components, making it difficult to completely isolate silt. In addition, the connection between the dredging mechanism and the drive shaft is mostly fixed or unidirectional rotation, such as directly transmitting torque through keyways or flanges. Although this ensures the reliability of the transmission, it limits the dynamic adaptability of the dredging blades during height adjustment and cannot simultaneously achieve the combined action of rotary cutting and vertical displacement.

[0032] In terms of sealing and anti-fouling, existing technologies mainly protect internal components through structures such as static sealing rings, anti-fouling enclosures, or flexible protective strips. For example, some robots use multi-layer rubber sealing rings at the connection between the motor and the drive shaft, filled with waterproof grease to reduce water seepage. However, after long-term use, aging of the sealing rings or wear from mud and sand can still lead to protective failure. Other designs encapsulate the drive motor in an anti-fouling enclosure and connect it to the external mechanism through bearings. However, dynamic sealing at the openings in the enclosure remains a technical challenge, especially since the gap between the high-speed rotating shaft and the enclosure can easily become a channel for mud and sand intrusion. In addition, for components that require frequent lifting and lowering (such as the support frame of a dredging mechanism), existing protective measures mostly use fixed baffles or sliding sleeves, which are difficult to adjust the sealing status in real time as the component moves, making the opening areas on the lifting path weak points in the protection.

[0033] Current underwater dredging robots are mainly used in shallow water areas (less than 20 meters deep) with low to medium current velocities. For example, in river dredging, robots need to move slowly along the riverbed and remove sediment while avoiding excessive damage to the riverbed ecosystem. In port maintenance, robots need strong obstacle avoidance capabilities to cope with complex underwater environments such as shipwrecks and rocks. For deep water or high-velocity waters, existing equipment often faces problems such as insufficient power, decreased positioning accuracy, and insufficient structural strength. Some solutions improve stability by adding counterweights or using buoyancy adjustment devices, but overall adaptability still needs improvement. In addition, the main power supply method is cable power, which can ensure continuous operation, but the risk of cable entanglement limits the robot's range of motion. A few designs using batteries are limited by battery capacity and underwater heat dissipation issues, making it difficult to support long-term high-intensity operations.

[0034] In summary, existing underwater dredging robots still face technical bottlenecks in structural design, dynamic sealing, height adjustment flexibility, and adaptability to complex environments, particularly lacking optimized solutions for simultaneously achieving efficient dredging, reliable protection, and multi-dimensional motion control. For example, the rotating blades of traditional dredging mechanisms are typically fixed to the drive shaft, making it impossible to maintain effective cutting depth during lifting and lowering; the protective structure provides insufficient dynamic coverage for moving parts, making critical transmission components susceptible to erosion by silt; and the lifting mechanism struggles to balance mechanical protection with motion precision, affecting the controllability of the dredging range. These problems restrict further improvements in the operational efficiency and lifespan of dredging robots, highlighting the urgent need for new, integrated, highly adaptive underwater dredging equipment with optimized protective performance.

[0035] Please see Figure 1-3 As shown, this embodiment provides an underwater dredging robot, including: an underwater work vehicle 1, a support plate 2 mounted on the upper side of the underwater work vehicle 1, a dirt-proof box 3 mounted on one side of the support plate 2, a drive assembly inside the dirt-proof box 3, and two ribs 7 mounted on the output end of the drive assembly, the ribs 7 being rotatably engaged with the lower side of the dirt-proof box 3;

[0036] An equipment trough is provided on one side of the underwater operation vehicle 1. A motor 11 is installed between the two sides of the equipment trough, and four rollers 12 are rotatably connected to it. The output shaft of the motor 11 is fixedly connected to a screw 1101. A lifting plate 10 is slidably connected inside the equipment trough, and an anti-fouling rubber belt 13 is movably connected to it. The lifting plate 10 is threadedly connected to the periphery of the screw 1101. One end of the anti-fouling rubber belt 13 is installed on the lower side of the lifting plate 10, and the other end passes around the four rollers 12 and is installed on the upper side of the lifting plate 10. The anti-fouling rubber belt 13 is located on the periphery of the motor 11 and the screw 1101. A support frame is installed on one side of the lifting plate 10. The support frame is slidably connected to one side of the underwater operation vehicle 1. Two dredging components are rotatably connected on the support frame. The dredging components are slidably connected to the periphery of the rib 7.

[0037] One application of this embodiment is as follows: During use, the underwater work vehicle 1 is started and moved to the target area. Then, the drive assembly is activated to rotate the two prism rods 7. The rotation of the prism rods 7 causes the dredging component to rotate synchronously for dredging. Simultaneously, the motor 11 can be started to drive the screw 1101 to rotate. The rotation of the screw 1101 forces the lifting plate 10 to move up and down along the equipment slot. The lifting plate 10 forms a closed-loop structure by passing around four rollers 12 via an anti-fouling rubber belt 13. This ensures that the anti-fouling rubber belt 13 remains in close contact with the rollers 12 during the up-and-down movement of the lifting plate 10, and also protects the motor 11 and screw 1101 from mud and sand. The movement of the lifting plate 10 causes the support frame to rise and fall accordingly, thereby adjusting the position and height of the dredging component. It should be noted that all electrical equipment involved in this application can be powered by a battery or an external power source.

[0038] The motor 11 drives the screw 1101 to move the lifting plate 10 up and down along the equipment slot. Combined with the anti-fouling rubber belt 13 that wraps around the four rollers 12 to form a closed-loop protection structure, the motor 11 and screw 1101 are effectively isolated from external mud and sand. At the same time, the anti-fouling box 3 protects the drive components from mud and sand, improving the overall durability of the robot. The height of the dredging component is adjusted synchronously with the lifting plate 10 by the support frame, reducing the risk of blind spots caused by changes in the depth of silt accumulation. The movement function of the underwater vehicle 1 and the rotation design of the linkage rod 7 of the drive components facilitate the sliding and rotation of the dredging component around the rod 7, realizing dynamic dredging coverage.

[0039] like Figure 2 As shown, in this embodiment, two scraping blocks 14 are installed between the two sides of the equipment tank. The two scraping blocks 14 are respectively installed on the upper and lower sides of the equipment tank. The scraping blocks 14 are located at the opening of the equipment tank. The lifting plate 10 is located between the upper and lower scraping blocks 14. The scraping blocks 14 are in contact with the outer surface of the anti-fouling rubber belt 13. By utilizing the friction between the anti-fouling rubber belt 13 and the scraping blocks 14 when the lifting plate 10 moves, it is easy to scrape off the silt attached to the surface of the anti-fouling rubber belt 13 and prevent mud and sand from being carried into the equipment tank.

[0040] like Figure 2 As shown, in this embodiment, baffles 101 are provided on both sides of the equipment slot, and grooves are provided on both sides of the lifting plate 10. The grooves vertically penetrate the lifting plate 10, and the baffles 101 vertically penetrate the grooves. The distance between the two baffles 101 is less than the width of the anti-fouling rubber belt 13. The baffles 101 are located between the two rollers 12 near the opening of the equipment slot. The baffles 101 restrict the lateral displacement of the anti-fouling rubber belt 13 between the rollers 12, which helps to maintain the stable path of the outermost part of the anti-fouling rubber belt 13. At the same time, the baffles 101 improve the linear accuracy of the movement of the lifting plate 10 by providing sliding guidance for the lifting plate 10.

[0041] like Figure 3 As shown, the support frame in this embodiment includes a horizontal extension plate 1001 installed on one side of the lifting plate 10, two vertical extension plates 1002 installed on one side of the horizontal extension plate 1001, and two connecting plates 1003 installed on one side of the vertical extension plates 1002. The vertical extension plates 1003 are located between the horizontal extension plate 1001 and the connecting plates 1003. The sludge removal component is rotatably fitted between the upper and lower connecting plates 1003. By adopting a hierarchical connection structure of horizontal extension plate 1001, vertical extension plate 1002 and connecting plate 1003, the sludge removal component can be stably set between the upper and lower connecting plates 1003. The vertical distribution of the vertical extension plate 1002 and the horizontal extension plate 1001 improves the load-bearing strength of the support frame on one side of the lifting plate 10 and reduces the impact of vibration of the sludge removal component during operation on the stability of the lifting plate 10.

[0042] like Figure 1 ,2 As shown, in this embodiment, two reinforcing ribs are installed on the side of the vertical extension plate 1002 away from the connecting plate 1003. The two reinforcing ribs are respectively installed on the upper and lower sides of the horizontal extension plate 1001. Two reinforcing ribs are installed on the side of the support plate 2 away from the anti-fouling box 3. The reinforcing ribs are installed on the upper side of the underwater operation vehicle 1. The reinforcing ribs enhance the connection rigidity between the vertical extension plate 1002 and the horizontal extension plate 1001. The reinforcing ribs improve the installation stability of the support plate 2 and the underwater operation vehicle 1, and reduce the risk of deformation or breakage of the support structure when the underwater operation vehicle 1 moves or is used for dredging operations.

[0043] like Figure 2 , 3 As shown, the dredging component in this embodiment includes a sleeve 9 adapted to the prism rod 7. The sleeve 9 is slidably fitted on the periphery of the prism rod 7. One end of the connecting plate 1003 is sleeved on the periphery of the sleeve 9. Multiple arc-shaped dredging blades 901 are welded to the side of the sleeve 9. The arc-shaped dredging blades 901 are located between the upper and lower connecting plates 1003. By using the rotation of the prism rod 7 to drive the sleeve 9 and the arc-shaped dredging blades 901 to rotate synchronously, and by the sleeve 9 sliding up and down along the prism rod 7, the arc-shaped dredging blades 901 can achieve rotational cutting at different depths.

[0044] like Figure 1-3 As shown, in this embodiment, the sleeve 9 is equipped with two bearings 1 around its periphery, the arc-shaped dredging knife 901 is located between the upper and lower bearings 1, one end of the connecting plate 1003 is installed on the periphery of the bearing 1, the lower part of one side of the underwater operation vehicle 1 is equipped with two first bearing seats 8, the lower end of the rib 7 is set in the first bearing seat 8, the two sides of the equipment slot are equipped with a second bearing seat, the lower end of the screw 1101 is set in the second bearing seat, the two sides of the equipment slot are equipped with four stabilizing columns, the periphery of the stabilizing columns is equipped with bearings 2, and the roller 12 is installed on the periphery of the bearings 2. The bearings 1 help to reduce the rotational friction between the sleeve 9 and the connecting plate 1003, the first bearing seats 8 improve the stability of the rib 7 when rotating, the second bearing seats improve the stability of the screw 1101 when rotating, and the bearings 2 improve the stability of the roller 12 when rotating.

[0045] like Figure 3As shown, the drive assembly of this embodiment includes a second motor 4 mounted on the upper side of the inner wall of the anti-fouling box 3, a first gear 5 and two second gears 6 rotatably engaged on the lower side of the inner wall of the anti-fouling box 3. Both the first motor 11 and the second motor 4 are waterproof motors as used in the prior art. The output shaft of the second motor 4 is fixedly connected to a third gear 401 that meshes with the first gear 5. The two second gears 6 mesh with the first gear 5 and the third gear 401 respectively. A rotating shaft is provided on the lower end face of the second gear 6, extending through to the outside of the anti-fouling box 3. A rib 7 is welded to the lower end face of the rotating shaft. The lower side of the anti-fouling box 3 is provided with... The rotating shaft has a corresponding slot, and a bearing three is installed around the slot. The bearing three is installed around the rotating shaft. A protrusion is provided on the lower side of the inner wall of the anti-fouling box 3. A bearing four is installed around the protrusion. Gear one 5 is installed around the bearing four. The drive assembly uses a motor two 4 to drive gear three 401 to mesh with gear one 5 and gear two 6. The cooperation of gear one 5, gear three 401 and two gears two 6 facilitates the transmission of power to the two prisms 7 to achieve rotational motion. At the same time, the protrusion and bearing four support gear one 5, improving the reliability of the drive assembly operation.

[0046] Bearing 1, Bearing 3, and the first bearing housing 8 can be stainless steel deep groove ball bearings or ceramic bearings with rubber seals to prevent mud and sand from entering and causing seizing. Stainless steel or ceramic materials are also corrosion resistant. Bearing 2 can be a nylon cage sealed bearing, which is lightweight and water corrosion resistant, reducing the rotational resistance of the rollers. Bearing 4 can be a high-load stainless steel tapered roller bearing, which can withstand radial and axial loads and isolate debris generated by gear meshing through a sealing structure. The second bearing housing can be a thrust roller bearing, with waterproof grease lubrication, to prevent silt from entering the gap and affecting the lifting accuracy. The above are all existing technologies. Those skilled in the art can also freely select and combine existing commercially available bearings according to actual needs and cost considerations.

[0047] This utility model is not limited to the above-described embodiments. Anyone should know that structural changes made under the guidance of this utility model, and any technical solutions that are the same as or similar to this utility model, fall within the protection scope of this utility model. Technical aspects, shapes, and structures not described in detail in this utility model are all publicly known technologies.

Claims

1. An underwater dredging robot, characterized in that, include: The underwater operation vehicle (1) is equipped with a support plate (2) on the upper side, and a dirt-proof box (3) is installed on one side of the support plate (2). A drive assembly is installed inside the dirt-proof box (3), and two ribs (7) are installed at the output end of the drive assembly. An equipment trough is provided on one side of the underwater operation vehicle (1). A motor (11) is installed between the two sides of the equipment trough, and four rollers (12) are rotatably fitted. The output shaft of the motor (11) is fixedly connected to a screw (1101). A lifting plate (10) is slidably fitted inside the equipment trough, and an anti-fouling rubber belt (13) is movably fitted. The lifting plate (10) is threaded around the screw (1101). One end of the anti-fouling rubber belt (13) is installed on the lower side of the lifting plate (10), and the other end passes around the four rollers (12) and is installed on the upper side of the lifting plate (10). A support frame is installed on one side of the lifting plate (10). Two dredging components are rotatably fitted on the support frame, and the dredging components are slidably fitted around the rib (7).

2. The underwater dredging robot according to claim 1, characterized in that, Two scraping blocks (14) are installed between the two sides of the equipment tank. The lifting plate (10) is located between the upper and lower scraping blocks (14). The scraping blocks (14) are in contact with the outer surface of the anti-fouling rubber belt (13).

3. The underwater dredging robot according to claim 1, characterized in that, Both sides of the equipment slot are provided with baffles (101), and both sides of the lifting plate (10) are provided with grooves. The baffles (101) penetrate the grooves vertically, and the distance between the two baffles (101) is less than the width of the anti-fouling rubber strip (13).

4. The underwater dredging robot according to claim 1, characterized in that, The support frame includes a horizontal extension plate (1001) installed on one side of the lifting plate (10), two vertical extension plates (1002) installed on one side of the horizontal extension plate (1001), and two connecting plates (1003) installed on one side of the vertical extension plate (1002). The sludge removal component is rotatably fitted between the upper and lower connecting plates (1003).

5. The underwater dredging robot according to claim 4, characterized in that, Two reinforcing ribs are installed on the side of the vertical extension plate (1002) away from the connecting plate (1003), and the two reinforcing ribs are respectively installed on the upper and lower sides of the horizontal extension plate (1001).

6. The underwater dredging robot according to claim 4, characterized in that, The dredging component includes a sleeve (9) that is adapted to the rib (7), a connecting plate (1003) is sleeved on one end of the sleeve (9), and multiple arc-shaped dredging blades (901) are welded to the side of the sleeve (9).

7. The underwater dredging robot according to claim 6, characterized in that, Two bearings are installed around the sleeve (9), and the arc-shaped sludge removal knife (901) is located between the upper and lower bearings. One end of the connecting plate (1003) is installed around the bearing.

8. The underwater dredging robot according to claim 1, characterized in that, The drive assembly includes a second motor (4) installed on the upper side of the inner wall of the anti-fouling box (3), a first gear (5) rotatably engaged on the lower side of the inner wall of the anti-fouling box (3), and two second gears (6). The output shaft of the second motor (4) is fixedly connected to a third gear (401) that meshes with the first gear (5). The two second gears (6) mesh with the first gear (5) and the third gear (401) respectively. The lower end face of the second gear (6) is provided with a rotating shaft, and a rib (7) is welded to the lower end face of the rotating shaft.

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