Submersible dredging device and dredging method
By combining the snorkeling mechanism and tracked walking mechanism of the submersible dredging device with the slurry suction and dredging system, the problem of dredging in the deep water area of the reservoir was solved, achieving efficient dredging in the center of the reservoir, improving dredging efficiency and thoroughness, and ensuring the long-term stability of the reservoir.
Patent Information
- Authority / Receiving Office
- CN · China
- Patent Type
- Applications(China)
- Current Assignee / Owner
- Filing Date
- 2026-01-20
- Publication Date
- 2026-03-13
AI Technical Summary
Existing mechanical equipment is insufficient to effectively clean up silt in the central and deep water areas of the reservoir, resulting in incomplete dredging and low efficiency.
Design a submersible dredging device that combines a snorkeling mechanism and a tracked walking mechanism to achieve free switching between floating on the water surface and sinking to the bottom of the reservoir. Equipped with a rake suction and dredging mechanism, the device uses a toothed rake to rotate and agitate the water and adjust the dredging depth. The device also uses a hydraulic system to control the movement and posture, thus achieving efficient dredging.
It breaks through the limitations of robotic arm length and operating radius, enabling comprehensive and efficient cleaning of the central and deep water areas of the reservoir, improving the thoroughness and efficiency of dredging operations, and ensuring the stability of the reservoir's capacity.
Smart Images
Figure CN121654147A_ABST
Abstract
Description
Technical Field
[0001] This invention relates to the field of dredging equipment technology, and in particular to a submersible dredging device and dredging method. Background Technology
[0002] As a crucial water conservancy project, a reservoir's construction and impoundment significantly increase water depth and slow water flow, leading to a decrease in sediment transport capacity. This results in substantial sediment deposition at the reservoir bottom, causing siltation. Siltation is often more severe in reservoirs built on rivers with high sediment content. Since the reservoir's function depends on its effective storage capacity, continuous siltation reduces this capacity, weakening its original design benefits for flood control, irrigation, power generation, and water supply. It can also pose a direct threat to the safety of the reservoir itself and the lives and property of people in downstream areas. Currently, dredging vessels and mud pumps are commonly used for mechanical silt removal. However, limited by the length and operating radius of the dredging vessel's arm, dredging operations are often limited to near-shore or shallower areas, failing to cover the silted areas in the central and deeper parts of the reservoir, resulting in incomplete and inefficient silt removal. Summary of the Invention
[0003] To address the aforementioned problems, this invention provides a submersible dredging device and a dredging method, specifically adopting the following technical solution: The submersible dredging device of the present invention includes a vehicle body, a buoyancy mechanism is provided inside the vehicle body, a tracked walking mechanism is provided at the bottom of the vehicle body, and a rake suction mechanism is provided at the front of the vehicle body. The rake suction mechanism includes a cover that is hinged to the front side wall of the vehicle body through a connecting frame. The cover has a bottom-open structure. A transmission shaft driven by a hydraulic motor is provided inside the cover. Multiple toothed rakes are evenly spaced on the transmission shaft. An angle adjustment cylinder is provided between the connecting frame and the front side wall of the vehicle body. A hollow connecting rod is provided on the connecting frame. One end of the connecting rod is connected to the cover, and the other end of the connecting rod is connected to the dredging mechanism.
[0004] This invention allows the dredging device to freely switch between floating on the water surface and sinking to the bottom of the reservoir via a buoyancy mechanism. This enables time-saving and labor-saving large-scale transfer on the water surface and free movement over a small area at the bottom of the reservoir, facilitating rapid and efficient dredging operations. During the dredging process, the dredging depth can be easily adjusted via an angle-adjusting hydraulic cylinder. Connected to the dredging discharge mechanism, it can efficiently discharge the silt from the bottom of the reservoir.
[0005] Preferably, the snorkeling mechanism includes a pressure tank installed inside the vehicle body, the pressure tank being filled with compressed air, a water supply pipe being installed at the bottom of the pressure tank, and a pressurized water pump and a drain solenoid valve being installed on the water supply pipe.
[0006] High-pressure water is injected into the pressure tank by a pressurized water pump. The air inside the tank is compressed, increasing the weight of the vehicle. When gravity exceeds buoyancy, the dredging vehicle can sink to the bottom of the reservoir. At this time, the vehicle's weight is sufficient to maintain the stability of the vehicle during the dredging process. When the dredging operation is completed or maintenance is required, the solenoid valve is opened, and the water inside the pressure tank is discharged. When buoyancy exceeds gravity, the dredging vehicle can float to the surface to change the working position or for maintenance.
[0007] Preferably, the connecting rod is located in the middle of the connecting frame, with one end of the connecting rod and the side beams on both sides fixedly connected to the cover and the other end hinged to the front side wall of the vehicle body; one end of the angle adjusting cylinder is hinged to the connecting rod and the other end is hinged to the front side wall of the vehicle body. The location of the connecting rod and the angle adjusting cylinder in the middle of the connecting frame is beneficial to structural stability and ensures stable suction of silt from the bottom of the reservoir.
[0008] Preferably, the cover is made of thin-walled corrugated pipe, and the central angle of the cover's cross-section is 210~280°. This cover can effectively collect the silt turned over by the rake at the bottom of the reservoir, which is beneficial for the suction of the silt removal mechanism.
[0009] Preferably, the drive shaft is located at the center of the cover, and multiple sets of rakes are evenly distributed along the axial direction of the drive shaft. Each set of rakes has multiple rakes evenly arranged along the circumference of the drive shaft. Each rake includes a rake bar arranged radially along the drive shaft, and the end of the rake bar is provided with rake teeth inclined to the same side.
[0010] Preferably, the sludge removal mechanism includes a sludge pump housed within the vehicle body. The inlet of the sludge pump is connected to a connecting rod via a flexible hose, and the outlet of the sludge pump is provided with a sludge removal pipe extending beyond the water body. Several floating bodies are spaced apart on the sludge removal pipe. By providing floating bodies, the sludge removal pipe can be kept afloat on the water surface, which facilitates adjusting the pipe's position and makes sludge removal easier.
[0011] Preferably, the vehicle body is also equipped with a hydraulic pump station for providing power to the tracked walking mechanism and the suction hopper mechanism.
[0012] Preferably, the vehicle body is provided with steering impellers around its perimeter. These steering impellers can assist the vehicle body in adjusting its underwater position.
[0013] The dredging method of the present invention, implemented by the above-mentioned submersible dredging device, includes the following steps: S1, Place the submersible dredging device on the surface of the reservoir, let it travel to the designated location under the towing of a ship, and then use a snorkeling mechanism to sink the submersible dredging device to the bottom of the reservoir. S2, activate the rake suction mechanism and the silt discharge mechanism. The toothed rake rotates and stirs up water and silt, which are then fed into the silt discharge mechanism via the connecting rod and discharged outside the reservoir. During this process, the tracked walking mechanism causes the vehicle to reciprocate and adjust its running posture. At the same time, the angle of the cover is adjusted by the angle adjustment cylinder according to the thickness of the silt, so as to adjust the silt removal depth. S3. After the dredging work here is completed, the submersible dredging device will be brought to the surface by a snorkeling mechanism. After being towed by a ship to another designated location, it will be sunk back to the bottom of the reservoir and the dredging will be carried out in accordance with the method in step two until all dredging work is completed.
[0014] The dredging device described in this invention can freely switch between two working states: floating on the water surface and sinking to the bottom of the reservoir. In its floating state, the device can quickly and effortlessly perform large-scale transfers; after sinking to the bottom, it can achieve precise movement and operation within a small area. This overcomes the bottleneck of traditional dredgers limited by the length of their robotic arms and their operating radius, effectively expanding the dredging operation range from shallow near-shore areas to the center and deep water areas of the reservoir, achieving comprehensive and efficient removal of accumulated silt and sediment. Compared with existing mechanical dredging methods, this invention has significant advantages in terms of flexibility, ease of adjustment, and rapid and efficient dredging, fundamentally improving the thoroughness and adaptability of dredging operations and ensuring the long-term stability of reservoir capacity and overall benefits. Attached Figure Description
[0015] Figure 1 This is a schematic diagram of the structure of the present invention.
[0016] Figure 2 yes Figure 1 Top view of the middle section of the vehicle body. Detailed Implementation
[0017] The embodiments of the present invention will be described in detail below with reference to the accompanying drawings. These embodiments are implemented based on the technical solution of the present invention, and detailed implementation methods and specific working processes are given. However, the scope of protection of the present invention is not limited to the following embodiments.
[0018] like Figure 1 , 2 As shown, the submersible dredging device of the present invention includes a vehicle body 1, a hydraulic pump station 2 and a buoyancy mechanism are installed inside the vehicle body 1, steering impellers 3 are installed around the vehicle body 1, a tracked walking mechanism 4 is installed at the bottom of the vehicle body 1, and a rake suction mechanism is installed at the front of the vehicle body 1.
[0019] Specifically, the snorkeling mechanism includes two pressure tanks 51 housed within the vehicle body 1. Each pressure tank 51 is filled with compressed air, and its bottom is connected to a water supply pipe 52. A pressurized water pump 53 and a drain solenoid valve 54 are installed on the water supply pipe 52. When high-pressure water is injected into the pressure tanks 51 by the pressurized water pump 53, the air inside is compressed, increasing the weight of the vehicle body 1. Since gravity exceeds buoyancy, the dredging vehicle can sink to the bottom of the reservoir. At this point, the vehicle's weight is sufficient to maintain stability during the dredging process. When the dredging operation is completed or maintenance is required, the solenoid valve 54 is opened, draining the water from the pressure tanks 51. With buoyancy exceeding gravity, the dredging vehicle can float to the surface to change its operating position or for maintenance. The number of pressure tanks 51 can be increased or decreased according to actual needs.
[0020] The raking and suction mechanism includes a cover 62 hinged to the front sidewall of the vehicle body 1 via a connecting frame 61. The cover 62 is made of thin-walled corrugated pipe and has a bottom-opening structure. Typically, the central angle of the cross-section of the cover 62 is 210~280°. A transmission shaft 64 driven by a hydraulic motor 63 is mounted at the center of the cover 62. Multiple toothed rakes 65 are evenly spaced on the transmission shaft 64. In this embodiment, multiple sets of toothed rakes 65 are evenly distributed along the axial direction of the transmission shaft 64. Each set of toothed rakes 65 has multiple sets evenly arranged along the circumference of the transmission shaft 64. Each toothed rake 65 includes a rake bar arranged radially along the transmission shaft 64, and the end of the rake bar is provided with rake teeth inclined to the same side. When the transmission shaft 64 rotates, the toothed rakes 65 rotate accordingly, turning over the silt in contact with the opening of the cover 62. The dispersed silt mixes with water to form a silt + water mixture, which is collected inside the cover 62 and rotates with the transmission shaft 64.
[0021] The connecting frame 61 consists of a side beam, a hollow connecting rod 66 located in the middle, and a connecting crossbeam. One end of the side beam and the hollow connecting rod 66 is fixedly connected to the cover, and the other end is hinged to the front side wall of the vehicle body 1. Simultaneously, an angle adjusting cylinder 67 is installed above the hollow connecting rod 66. One end of the angle adjusting cylinder 67 is hinged to the hollow connecting rod 66, and the other end is hinged to the front side wall of the vehicle body 1. Therefore, by adjusting the angle adjusting cylinder 67, the pitch angle of the cover 62 can be adjusted, thereby achieving adjustment of the dredging depth.
[0022] One end of the hollow connecting rod 66 is connected to the cover 62, and the other end is connected to the sludge discharge mechanism.
[0023] The sludge removal mechanism includes a sludge pump 7 installed inside the vehicle body 1. The inlet end of the sludge pump 7 is connected to a hollow connecting rod 66 via a flexible hose 71, and the outlet end is provided with a sludge removal pipe 72 extending beyond the water body. Furthermore, in order to keep the sludge removal pipe 72 floating on the water surface, several floating bodies 73 are installed on it at intervals. The floating bodies 73 can be made of low-density materials such as polystyrene board or foam, or hollow structures.
[0024] The aforementioned hydraulic pump station 2 is used to provide power to the tracked walking mechanism and the slurry suction mechanism. The steering impeller 3 is used to assist the vehicle body 1 in adjusting its position underwater.
[0025] The dredging method of the present invention, implemented by the above-mentioned submersible dredging device, includes the following steps: S1, Place the submersible dredging device on the surface of the reservoir, let it travel to the designated location under the towing of a ship, and then use a snorkeling mechanism to sink the submersible dredging device to the bottom of the reservoir. S2, start the rake suction mechanism and the silt discharge mechanism. The toothed rake 65 rotates and stirs up water and silt, which enters the silt discharge mechanism through the connecting rod and is discharged out of the reservoir. During this process, the track walking mechanism makes the vehicle body 1 reciprocate and adjust the running posture. At the same time, according to the thickness of the silt, the angle of the cover 62 is adjusted by the angle adjustment cylinder 67 to adjust the silt removal depth. S3. After the dredging work here is completed, the submersible dredging device will be brought to the surface by a snorkeling mechanism. After being towed by a ship to another designated location, it will be sunk back to the bottom of the reservoir and the dredging will be carried out in accordance with the method in step two until all dredging work is completed.
[0026] It should be noted that in the description of this invention, terms such as "front," "rear," "left," "right," "vertical," "horizontal," "inner," and "outer" indicating orientation or positional relationships are based on the orientation or positional relationships shown in the accompanying drawings. They are used only for the convenience of describing this invention and simplifying the description, and are not intended to indicate or imply that the device or element referred to must have a specific orientation, or be constructed and operated in a specific orientation. Therefore, they should not be construed as limitations on this invention.
Claims
1. A submersible dredging device, characterized in that: The system includes a vehicle body, within which a snorkeling mechanism is installed. A tracked walking mechanism is installed at the bottom of the vehicle body, and a scavenging and suction mechanism is installed at the front of the vehicle body. The scavenging and suction mechanism includes a cover that is hinged to the front side wall of the vehicle body via a connecting frame. The cover has a bottom-open structure, and a hydraulically driven transmission shaft is installed inside the cover. Multiple toothed rakes are evenly spaced on the transmission shaft. An angle-adjusting cylinder is installed between the connecting frame and the front side wall of the vehicle body. A hollow connecting rod is installed on the connecting frame. One end of the connecting rod is connected to the cover, and the other end of the connecting rod is connected to the sludge removal mechanism.
2. The submersible dredging device according to claim 1, characterized in that: The snorkeling mechanism includes a pressure tank installed inside the vehicle body, which is filled with compressed air. A water supply pipe is installed at the bottom of the pressure tank, and a pressurized water pump and a drain solenoid valve are installed on the water supply pipe.
3. The submersible dredging device according to claim 1, characterized in that: The connecting rod is located in the middle of the connecting frame. One end of the connecting rod and the side beams on both sides are fixedly connected to the cover, and the other end is hinged to the front side wall of the vehicle body. One end of the angle adjusting cylinder is hinged to the connecting rod, and the other end is hinged to the front side wall of the vehicle body.
4. The submersible dredging device according to claim 1, characterized in that: The cover is made of thin-walled corrugated pipe, and the central angle of the cross-section of the cover is 210~280°.
5. The submersible dredging device according to claim 1, characterized in that: The drive shaft is located at the center of the cover. Multiple sets of rakes are evenly distributed along the axial direction of the drive shaft. Each set of rakes has multiple rakes evenly arranged along the circumference of the drive shaft. Each rake includes a rake bar arranged radially along the drive shaft. The end of the rake bar is provided with rake teeth that are inclined to the same side.
6. The submersible dredging device according to claim 1, characterized in that: The sludge removal mechanism includes a sludge pump installed inside the vehicle body. The inlet end of the sludge pump is connected to a connecting rod via a hose, and the outlet end of the sludge pump is provided with a sludge removal pipe extending beyond the water body. Several floating bodies are spaced apart on the sludge removal pipe.
7. The submersible dredging device according to claim 1, characterized in that: The vehicle body is also equipped with a hydraulic pump station for providing power to the tracked walking mechanism and the suction hopper mechanism.
8. The submersible dredging device according to claim 1, characterized in that: Steering impellers are installed around the vehicle body.
9. A dredging method, implemented using the submersible dredging device according to any one of claims 1-8, characterized in that, Includes the following steps: S1, Place the submersible dredging device on the surface of the reservoir, let it travel to the designated location under the towing of a ship, and then use a snorkeling mechanism to sink the submersible dredging device to the bottom of the reservoir. S2, activate the rake suction mechanism and the silt discharge mechanism. The toothed rake rotates and stirs up water and silt, which are then fed into the silt discharge mechanism via the connecting rod and discharged outside the reservoir. During this process, the tracked walking mechanism causes the vehicle to reciprocate and adjust its running posture. At the same time, the angle of the cover is adjusted by the angle adjustment cylinder according to the thickness of the silt, so as to adjust the silt removal depth. S3. After the dredging work here is completed, the submersible dredging device will be brought to the surface by a snorkeling mechanism. After being towed by a ship to another designated location, it will be sunk back to the bottom of the reservoir and the dredging will be carried out in accordance with the method in step two until all dredging work is completed.