Deepwater gravel bed dredging system and dredging construction method thereof

Abstract

The present invention discloses a deep-water gravel bed dredging system and a dredging construction method thereof, and belongs to the technical field of underwater bed construction. It includes a floating body, a gantry trolley mechanism, a dredging device, a bottoming device and a monitoring device; the dredging device is connected to the gantry trolley mechanism, and the bottoming device is connected to the gantry trolley mechanism through a cable; the monitoring device is connected to the bottoming device, and the monitoring device determines the real-time contact state between the bottoming device and the surface of the dredged area according to the force change of the monitoring device, and controls the gantry trolley mechanism to drive the dredging device and the bottoming device to rise and fall synchronously, so that the bottoming device is adjusted in real time to be between a completely bottoming state and a completely disengaged state, so that the dredging device is at an operating depth. The present invention solves the technical problem that the dredging system in the prior art cannot effectively control the operating depth of the dredging device according to the change of tidal range in a large water depth environment.

Description

Technical Field

[0001] The invention belongs to the technical field of underwater base bed construction, and in particular relates to a deep-water gravel base bed dredging system and a dredging construction method thereof. Background Art

[0002] In the process of river management and maintenance, a dredging system is usually used to clean the silt on the surface of the gravel layer of the subgrade to ensure the stability of the overall structure of the subgrade for subsequent construction. However, the existing dredging system is mainly suitable for dredging operations in shallow water depths and shows obvious shortcomings in deep water environments.

[0003] The existing dredging system has the following main shortcomings: 1. The existing dredging system uses a non-detachable fixed dredging hull for dredging operations. This design limits the flexibility of the dredging system and makes it difficult to adapt to changes in different water depths and terrains; 2. The existing dredging system cannot monitor the height of the dredging device and the surface of the gravel layer in real time according to the tidal range changes; 3. Even if some dredging systems have added monitoring devices, they only add a contact switch to the dredging device, but this contact switch is directly installed at the bottom of the dredging head. The operating depth of the dredging device is determined by whether the contact switch is in contact with the silt. However, this method is only applicable to shallow water depths. For dredging operations in deep water environments, especially at a water depth of about 20 meters, the tidal range changes significantly, and the influence of water pressure and water flow is large, which can easily cause the contact switch to malfunction or be damaged, seriously affecting the normal progress of the dredging operation. In this field, a water depth of about 20 meters is considered a deep water depth.

[0004] The above defects will lead to low dredging efficiency, especially in river sections or sea areas with large tidal range changes, the continuity and effectiveness of dredging operations will be seriously affected. The existing dredging system cannot adjust the operating depth in real time according to the tidal range changes in deep water environments, resulting in unsatisfactory dredging effects, and the gravel layer is easily stirred, affecting the dredging quality. It can be seen that in deep water environments, the existing dredging system is difficult to meet the needs of efficient and stable dredging operations, and it is even more difficult to ensure that the dredging system can absorb the silt on the surface of the gravel layer during the dredging process without stirring the gravel layer. Summary of the invention

[0005] The details of one or more embodiments of the present invention are set forth in the following drawings and description to make other features, objects, and advantages of the present application more readily apparent.

[0006] The present invention proposes a deep-water gravel base bed dredging system and a dredging construction method thereof, which solves the problem that the prior art cannot effectively control the dredging operation depth of the dredging device in the dredging system in a deep water environment. The system is suitable for use in a deep water environment and in a river section with a large tidal range, and can effectively ensure the continuity and effectiveness of the dredging operation.

[0007] On the one hand, the present invention discloses a deep-water gravel bed dredging system, comprising a floating body, a gantry trolley mechanism, a dredging device, a bottoming device and a monitoring device; the gantry trolley mechanism is arranged on the floating body; the dredging device is connected to the gantry trolley mechanism, and is controlled by the gantry trolley mechanism to move up and down to perform dredging operations; the bottoming device is connected to the gantry trolley mechanism through a cable, and is controlled by the gantry trolley mechanism to rise and fall synchronously with the dredging device; the bottoming device is deeper in water than the dredging device, and first contacts the surface of the dredging area after entering the water; the monitoring device is connected to the bottoming device, and when the bottoming device is in a completely bottoming state, the monitoring device , the bottoming device has no force on the monitoring device; when the bottoming device is in a completely disengaged state, the gravity of the bottoming device completely acts on the monitoring device; when the bottoming device is between the completely bottoming state and the completely disengaged state, part of the gravity of the bottoming device acts on the monitoring device; wherein, the monitoring device determines the real-time contact state between the bottoming device and the surface of the area to be dredged according to the force change of the monitoring device, and controls the gantry trolley mechanism to drive the dredging device and the bottoming device to rise and fall synchronously, so that the bottoming device is adjusted in real time to be between the completely bottoming state and the completely disengaged state, so that the dredging device is at the operating depth.

[0008] In some embodiments, the monitoring device includes a weighing sensor and a control module, the weighing sensor is fixed on the gantry trolley mechanism, the weighing sensor is connected to the bottoming device, and the control module is electrically connected to the weighing sensor and the gantry trolley mechanism; the weighing sensor is configured as follows: when the weighing sensor detects that the bottoming device has no force on the weighing sensor, the weighing sensor sends a first weight signal to the control module; when the weighing sensor detects that the gravity of the bottoming device completely acts on the weighing sensor, the weighing sensor sends a first weight signal to the control module. The control module sends out a second weight signal; when the weighing sensor detects that the gravity of the bottoming device acts on the weighing sensor, the weighing sensor sends out a weight signal between the first weight signal and the second weight signal to the control module; the control module is configured to: according to the weight signal sent by the weighing sensor received in real time, control the gantry trolley mechanism to drive the dredging device and the bottoming device to rise and fall synchronously, so that the weight signal of the weighing sensor is adjusted in real time to be between the first weight signal and the second weight signal, thereby completing the real-time adjustment of the operating depth of the dredging device.

[0009] In some of the embodiments, the gantry trolley mechanism includes a main beam and a cantilever mechanism, the main beam is installed on the floating body, the main beam is provided with a transverse moving mechanism, and a guide rail for the transverse moving mechanism to move along the main beam; the cantilever mechanism is a frame structure rotatably connected to the transverse moving mechanism, the cantilever mechanism is in a vertical state at least in a working state, a first winch is provided on the top of the cantilever mechanism, the first winch is provided with a first retractable cable, the lower end of the first cable is provided with a hook, the hook is connected to the dredging device, the first cable drives the dredging device to move up and down along the cantilever mechanism, and is used to adjust the height of the dredging device to adapt to changes in tidal differences.

[0010] In some of the embodiments, the cantilever mechanism includes an upper arm assembly and a lower arm assembly, the top of the upper arm assembly is rotatably connected to the lateral moving mechanism, the upper arm assembly is composed of a plurality of upper arm frames connected in sequence, and the upper arm frame is a vertical through-structure; the lower arm assembly is connected to the bottom end of the upper arm assembly, the lower arm assembly is composed of a plurality of lower arm frames connected in sequence, and the lower arm frame is a vertical through-structure, and lifting rails are respectively provided around the interior of the lower wall frame, and the dredging device moves up and down along the lifting rails.

[0011] In some embodiments, the dredging device includes a dredging head and a lifting arm. The dredging head is provided with a mud suction port capable of sucking in sludge, and a mud discharge port capable of discharging sludge to the floating body; a movable pulley and a first steel wire rope are provided at one end of the lifting arm, one end of the first steel wire rope is connected to the hook, passes around the movable pulley, extends upward, and is fixedly connected to the cantilever mechanism, and the other end is connected to the dredging head. The lifting arm includes an intermediate lifting beam, a cross beam and two transition beams. A plurality of rollers are respectively provided in the vertical direction around the intermediate lifting beam, and the rollers move up and down along the lifting track; the cross beam is connected to the intermediate lifting beam; one end of the two transition beams are respectively rotatably connected to the cross beam, and the other ends of the two transition beams are connected to the dredging head.

[0012] In some embodiments, the bottoming device includes two bottoming mechanisms, a movable pulley set, a second steel wire rope and a third steel wire rope, and the two bottoming mechanisms are respectively arranged on both sides of the dredging device and are parallel to each other; the movable pulley set is arranged above and in the middle of the two bottoming mechanisms; one end of the second steel wire rope is connected to one of the bottoming mechanisms and then bypasses the movable pulley set to extend downward and connect to the other bottoming mechanism so that the two bottoming mechanisms form a whole; one end of the third steel wire rope is connected to the hook, bypasses the movable pulley set, extends upward and is connected to the weighing sensor.

[0013] In some embodiments, a plurality of guide wheels are respectively provided on both sides of the dredging head close to the two bottoming mechanisms. One end of the second steel wire rope is connected to one of the bottoming mechanisms and then extends upward along the guide wheel, bypasses the movable pulley group, extends downward and is connected to the other bottoming mechanism so that the two bottoming mechanisms form a whole.

[0014] In some of the embodiments, the deep-water gravel bed dredging system also includes a walking rail and a second winch, wherein the walking rail is arranged on the floating body, the walking rail is arranged in parallel along the length direction of the floating body, and the gantry trolley mechanism moves back and forth along the walking rail; the second winch is arranged on the floating body, and the second cable on the second winch passes around the fixed pulley assembly and is connected to the lower arm assembly, and the second winch is started, and the second cable pulls the cantilever mechanism to rotate around the lateral moving mechanism, so that the cantilever mechanism is in a horizontal direction or a vertical direction.

[0015] Another aspect of the present invention discloses a dredging construction method for a deep-water gravel bed dredging system, the dredging construction method comprising the following steps:

[0016] Assembly and debugging steps: install the gantry trolley mechanism on the floating body, install the first winch on the gantry trolley mechanism, connect the dredging device and the bottoming device to the first winch respectively, connect the monitoring device to the bottoming device, and after the assembly is completed, debug the entire dredging system;

[0017] The dredging device lowering step: the dredging device is driven from a horizontal direction to a vertical direction by a gantry trolley mechanism, and the dredging device is lowered, and the dredging device is controlled to be at a dredging operation depth by a monitoring device;

[0018] Dredging operation steps: start the dredging device, suck in the sludge and discharge the sludge onto the floating body; during the dredging operation, the dredging device is controlled by the monitoring device to always be at the dredging operation depth;

[0019] Among them, the specific steps of controlling the dredging device to be at the dredging operation depth through the monitoring device are as follows: when the monitoring device detects that the bottoming device has no force on the monitoring device, it is determined that the bottoming device is in a completely bottoming state, and the monitoring device controls the gantry trolley mechanism to lift the bottoming device upward, so that the bottoming device is between the completely bottoming state and the completely disengaged state. At this time, the dredging device is correspondingly at the dredging operation depth, and the dredging operation depth of the dredging device is adjusted; when the monitoring device detects that the gravity of the bottoming device completely acts on the monitoring device, it is determined that the bottoming device is in a completely disengaged state, and the monitoring device controls the gantry trolley mechanism to lower the bottoming device, so that the bottoming device is between the completely bottoming state and the completely disengaged state. At this time, the dredging device is correspondingly at the dredging operation depth, and the dredging operation depth of the dredging device is adjusted;

[0020] Acceptance and disassembly steps: After completing the gravel base bed dredging operation, an acceptance inspection will be carried out. After successful acceptance, the dredging system will be disassembled.

[0021] In some embodiments, the specific steps of the monitoring device controlling the movement of the gantry trolley mechanism according to the change of the force applied to the monitoring device by the bottoming device are:

[0022] a. When the weighing sensor detects that the bottoming device has no force on the weighing sensor, the weighing sensor sends a first weight signal to the control module; when the control module receives the first weight signal, it determines that the bottoming device is in a completely bottoming state, and at this time the control module controls the gantry trolley mechanism to lift the bottoming device upward, so that the weight signal on the control module is between the first weight signal and the second weight signal, and the adjustment of the operating depth of the dredging device is completed;

[0023] b. When the weighing sensor detects that the gravity of the bottoming device fully acts on the weighing sensor, the weighing sensor sends a second weight signal to the control module; when the control module receives the second weight signal, it determines that the bottoming device is in a completely disengaged state, and at this time the control module controls the gantry trolley mechanism to lower the bottoming device, so that the weight signal on the control module is between the first weight signal and the second weight signal, thereby completing the adjustment of the operating depth of the dredging device;

[0024] c. When the weighing sensor detects that the gravity of the bottoming device acts on the weighing sensor, the weighing sensor sends a weight signal between the first weight signal and the second weight signal to the control module. When the control module receives the weight signal between the first weight signal and the second weight signal, it determines that the bottoming device is between the complete bottoming state and the complete detachment state. At this time, the dredging device is at the dredging operation depth, and the control module does not need to control the movement of the gantry trolley mechanism.

[0025] Compared with the prior art, the present invention has the following beneficial effects:

[0026] 1. On the one hand, the present invention provides a deep-water gravel bed dredging system, which has strong adaptability and can work in different water depths and complex underwater environments. In particular, in a large water depth environment (such as about 20 meters), the operating depth of the dredging device can be controlled in real time, which can not only suck away the silt on the surface of the gravel layer but also ensure that the gravel layer at the bottom of the silt will not be stirred, and at the same time ensure the continuity and stability of the dredging operation.

[0027] 2. In the present invention, by setting a monitoring device and a bottoming device, and controlling the bottoming state of the bottoming device, the operating depth of the dredging device is further accurately controlled, and the automatic lifting and lowering adjustment of the gantry trolley mechanism is realized. In this way, the efficiency of the dredging operation is improved, and manual intervention and errors are reduced, thereby improving the dredging quality.

[0028] 3. In the present invention, the design of the lifting track on the first winch and the cantilever mechanism can flexibly adjust the operating depth of the dredging device to adapt to the tidal range changes, ensuring the continuous dredging operation. This is particularly important in river sections with large tidal range changes, greatly improving the reliability of the entire dredging system and effectively adapting to tidal range changes under large water depths.

[0029] 4. The lifting arm and movable pulley structure of the dredging device of the present invention ensure that the dredging head can perform dredging operations stably and efficiently. The cooperation of the lateral moving mechanism and the walking guide rail enables the dredging operation to cover a wide range, reduces dredging dead corners, and improves the overall dredging efficiency.

[0030] 5. On the other hand, the present invention provides a dredging construction method for a deep-water gravel bed dredging system. This dredging construction method realizes full automatic control of the lifting and lowering of the dredging device through the cooperation of a control module, a weighing sensor and a gantry trolley mechanism, without manual intervention, greatly improving the efficiency and accuracy of the dredging operation; the height of the dredging device is automatically adjusted according to the tidal range changes and the bottom conditions to ensure that the dredging head is always at the optimal operating depth. This automatic adjustment method improves the dredging efficiency and reduces the disturbance to the gravel layer. The control module receives the weight signal sent by the weighing sensor in real time and controls the gantry trolley mechanism to drive the dredging device and the bottoming device to rise and fall synchronously, completing the real-time adjustment of the operating depth of the dredging device, ensuring that the dredging device is always at the dredging operating depth for dredging, avoiding the dredging device stirring the gravel layer or failing to achieve dredging due to tidal range changes or other external factors, thereby ensuring the continuity and stability of the dredging operation. The entire dredging system can be assembled and disassembled. When dredging is required, the floating body can drive the dredging device to carry out dredging. When the dredging operation is completed, the entire dredging system can be disassembled and the floating body can be used for other purposes, making the entire dredging system widely used. BRIEF DESCRIPTION OF THE DRAWINGS

[0031] The drawings described herein are used to provide a further understanding of the present invention and constitute a part of the present invention. The exemplary embodiments of the present invention and their descriptions are used to explain the present invention and do not constitute an improper limitation of the present invention. In the drawings:

[0032] Figure 1 A schematic structural diagram of a deep-water gravel bed dredging system provided by an embodiment of the present invention;

[0033] Figure 2 A schematic diagram of a structure in which a bottoming device provided in an embodiment of the present invention is connected to a first hoist and a silt removal device is connected to the first hoist;

[0034] Figure 3 A schematic diagram of the structure of a gantry trolley mechanism provided in an embodiment of the present invention;

[0035] Figure 4 A front view of a gantry trolley mechanism provided by an embodiment of the present invention;

[0036] Figure 5 A schematic diagram of the structure of a cantilever mechanism provided by an embodiment of the present invention;

[0037] Figure 6 A schematic diagram of the structure of an upper arm assembly provided by an embodiment of the present invention;

[0038] Figure 7 A schematic structural diagram of a lower arm assembly provided by an embodiment of the present invention;

[0039] Figure 8 A schematic diagram of the structure of a dredging device provided in an embodiment of the present invention;

[0040] Fig. 9 A schematic diagram of the structure of a lifting arm provided in an embodiment of the present invention;

[0041] Fig.10 A schematic diagram of the structure of a dredging head provided by an embodiment of the present invention;

[0042] Fig.11 A schematic diagram of the structure of a bottom contact device provided by an embodiment of the present invention;

[0043] Fig.12 A flow chart of a construction method provided by an embodiment of the present invention;

[0044] Fig.13 A flow chart of a monitoring device provided in an embodiment of the present invention monitoring a bottoming device;

[0045] In the above figures:

[0046] 1- floating body; 11- walking guide rail; 2- dredging device; 21- dredging head; 211- mud suction port; 212- mud outlet; 22- lifting arm; 221- middle lifting beam; 222- cross beam; 223- transition beam; 224- roller; 23- movable pulley; 24- first wire rope; 25- guide wheel; 3- gantry trolley mechanism; 31- main beam; 32- horizontal moving mechanism; 33- guide rail; 34- cantilever mechanism ;341-upper arm assembly;3411-upper arm frame;342-lower arm assembly;3421-lower arm frame;3422-lifting track;35-first winch;36-first cable;37-hook;4-bottoming device;41-bottoming mechanism;42-movable pulley block;43-second steel wire rope;44-third steel wire rope;5-weighing sensor;6-second winch;7-second cable;8-fixed pulley assembly. DETAILED DESCRIPTION

[0047] In order to make the purpose, technical scheme and advantages of the present invention more clearly understood, the present invention is described and illustrated below in conjunction with the accompanying drawings and embodiments. It should be understood that the specific embodiments described herein are only used to explain the present invention and are not intended to limit the present invention. Based on the embodiments provided by the present invention, all other embodiments obtained by ordinary technicians in this field without making creative work belong to the scope of protection of the present invention.

[0048] Obviously, the drawings described below are only some examples or embodiments of the present invention. For ordinary technicians in this field, the present invention can also be applied to other similar scenarios based on these drawings without creative work. In addition, it can also be understood that although the efforts made in this development process may be complicated and lengthy, for ordinary technicians in this field related to the content disclosed by the present invention, some changes in design, manufacturing or production based on the technical content disclosed by the present invention are just conventional technical means, and should not be understood as insufficient content disclosed by the present invention.

[0049] Reference to "embodiments" in the present invention means that a particular feature, structure, or characteristic described in conjunction with the embodiments may be included in at least one embodiment of the present invention. The appearance of the phrase in various places in the specification does not necessarily refer to the same embodiment, nor is it an independent or alternative embodiment that is mutually exclusive with other embodiments. It is explicitly and implicitly understood by those of ordinary skill in the art that the embodiments described in the present invention may be combined with other embodiments without conflict.

[0050] Unless otherwise defined, the technical terms or scientific terms involved in the present invention shall have the usual meanings understood by persons with ordinary skills in the technical field to which the present invention belongs. The words "one", "a", "a", "the" and the like involved in the present invention do not indicate a quantity limitation and may indicate the singular or plural. The terms "include", "comprise", "have" and any of their variations involved in the present invention are intended to cover non-exclusive inclusions; for example, a process, method, system, product or device including a series of steps or modules (units) is not limited to the listed steps or units, but may also include steps or units that are not listed, or may also include other steps or units inherent to these processes, methods, products or devices. The words "connect", "connected", "coupled" and the like involved in the present invention are not limited to physical or mechanical connections, but may include electrical connections, whether direct or indirect. The "multiple" involved in the present invention refers to two or more. "And / or" describes the association relationship of associated objects, indicating that there may be three relationships. For example, "A and / or B" may indicate: A exists alone, A and B exist at the same time, and B exists alone. The character " / " generally indicates that the objects in the front and back relation are in an "or" relationship. The terms "first", "second", "third" and the like involved in the present invention are only used to distinguish similar objects and do not represent a specific ordering of the objects.

[0051] The embodiment of the present invention provides a deep-water gravel bed dredging system, referring to Figure 1-Figure 13 As shown, the dredging system at least comprises a floating body 1 floating on the water surface, a gantry trolley mechanism 3, a dredging device 2, a bottoming device 4 and a monitoring device. The gantry trolley mechanism 3 is arranged on the deck of the floating body 1, the dredging device 2 is connected to the gantry trolley mechanism 3, and is controlled by the gantry trolley mechanism 3 to move up and down to perform dredging operations, the bottoming device 4 is connected to the gantry trolley mechanism 3 through a cable, and is controlled by the gantry trolley mechanism 3 to rise and fall synchronously with the dredging device 2; the bottoming device 4 enters the water deeper than the dredging device 2, and first contacts the surface of the dredging area after entering the water; the monitoring device is connected to the bottoming device 4; when the bottoming device 4 is in a complete state, the bottoming device 4 is in a state of contact with the dredging device 2; ... When in the full bottoming state, the bottoming device 4 has no force on the monitoring device; when the bottoming device 4 is in a completely disengaged state, the gravity of the bottoming device 4 acts completely on the monitoring device; when the bottoming device 4 is between the full bottoming state and the completely disengaged state, part of the gravity of the bottoming device 4 acts on the monitoring device; wherein, the monitoring device determines the real-time contact state of the bottoming device 4 with the surface of the area to be dredged according to the force change of the monitoring device, and controls the gantry trolley mechanism 3 to drive the dredging device 2 and the bottoming device 4 to rise and fall synchronously, so that the bottoming device 4 is adjusted in real time to be between the full bottoming state and the completely disengaged state, so that the dredging device 2 is at the operating depth.

[0052] The deep-water gravel bed dredging system of the present invention maintains buoyancy and stability through a floating body 1. A gantry trolley mechanism 3 is installed on the floating body 1 to control the lifting and lowering of the dredging device 2. The dredging device 2 is installed at the lower end of the gantry trolley mechanism 3, and is lifted and lowered in the water by the gantry trolley mechanism 3 to ensure the operating depth of the dredging device 2. The bottoming device 4 is connected to the gantry trolley mechanism 3 by a cable, and is lifted and lowered synchronously with the dredging device 2 to ensure that the bottoming device 4 contacts the surface of the dredging area before the dredging device 2 to provide accurate depth information. The monitoring device determines the real-time contact state of the bottoming device 4 with the surface of the dredging area according to the force change of the monitoring device, thereby accurately controlling the operating depths of the bottoming device 4 and the dredging device 2 to ensure the accuracy and effectiveness of the dredging operation. Since the lifting of the bottoming device 4 is to determine the real-time contact state of the bottoming device 4 and the surface of the place to be desilted according to the force change of the monitoring device, the lifting is directly controlled by the gantry trolley mechanism 3, thereby realizing the control of the desilting operation depth of the desilting device, instead of being directly arranged at the bottom of the desilting device like the contact switch in the prior art, so there will be no phenomenon of insufficient protection or failure of the contact switch arranged at the bottom of the desilting device 2 due to factors such as deep water environment or tidal range change, so the design of the bottoming device 4 in the present invention is suitable for deep water environment, and there will be no phenomenon of insufficient protection or failure due to factors such as deep water environment or tidal range change, thereby affecting the control of the operation depth of the desilting device 2, and finally leading to incomplete desilting or stirring of the gravel layer. More, the design of the desilting system ensures that the desilting device 2 can accurately perform desilting operations, and through the synergistic effect of the gantry trolley mechanism 3 and the bottoming device 4, the desilting process is more efficient and accurate. The present invention has a high degree of automation, can reduce manual intervention, and improve work efficiency. Furthermore, the design of the bottom contact device 4 can adapt to large water depth environments and different tidal range changes, greatly improving the dredging efficiency and the specific application range.

[0053] In some embodiments, the bottom contact device 4 can be designed in different forms, such as different shapes of bottom contact structures to adapt to different underwater environments. In addition, the gantry trolley mechanism 3 can be designed in different structural forms to adapt to different types of floating bodies 1. The size and shape of the dredging device 2 can also be adjusted according to different dredging requirements.

[0054] In some embodiments, Figure 1 As shown, the floating body 1 is a dredging ship floating on the water, and the size and structure of the dredging ship can be replaced according to actual needs.

[0055] Furthermore, the monitoring device includes a weighing sensor 5 and a control module. The weighing sensor 5 is fixed on the gantry trolley mechanism 3. The weighing sensor 5 is connected to the bottoming device 4. The weight signal of the bottoming device 4 is detected by the weighing sensor 5. The control module is electrically connected to the weighing sensor 5 and the gantry trolley mechanism 3. The weighing sensor 5 is configured as follows: when the weighing sensor 5 detects that the bottoming device 4 has no force on the weighing sensor 5, the weighing sensor 5 sends a first weight signal to the control module; when the weighing sensor 5 detects that the gravity of the bottoming device 4 completely acts on the weighing sensor 5, the weighing sensor 5 sends a first weight signal to the control module. The weight sensor 5 sends a second weight signal to the control module; when the weighing sensor 5 detects that the gravity of the bottoming device 4 acts on the weighing sensor 5, the weighing sensor 5 sends a weight signal between the first weight signal and the second weight signal to the control module; the control module is configured to: according to the weight signal sent by the weighing sensor 5 received in real time, control the gantry trolley mechanism 3 to drive the dredging device 2 and the bottoming device 4 to rise and fall synchronously, so that the weight signal of the weighing sensor 5 is adjusted in real time to be between the first weight signal and the second weight signal, and the real-time adjustment of the working depth of the dredging device 2 is completed. The present invention accurately detects the force change of the bottoming device 4 on the weighing sensor 5 through the weighing sensor 5, and converts this force into a weight signal and sends it to the control module. The control module controls the lifting and lowering of the dredging device 2 and the bottoming device 4 by the gantry trolley mechanism 3 in real time through the weight signal sent, thereby ensuring that the dredging device 2 can accurately reach the working position in real time, and improving the accuracy and efficiency of the dredging operation. At the same time, the automatic adjustment function reduces the complexity and error of manual operation.

[0056] In some embodiments, the shape and material of the bottom contacting device 4 can also be optimized and adjusted according to the specific bottom conditions.

[0057] Further, the gantry trolley mechanism 3 includes a main beam 31 and a cantilever mechanism 34, the main beam 31 is installed on the floating body 1, and a lateral moving mechanism 32 and a guide rail 33 for the lateral moving mechanism 32 to move along the main beam 31 are provided on the main beam 31; the cantilever mechanism 34 is a frame structure rotatably connected to the lateral moving mechanism 32, the cantilever mechanism 34 is in a vertical state at least in the working state, a first winch 35 is provided on the top of the cantilever mechanism 34, a first cable 36 that can be retracted is provided on the first winch 35, a hook 37 is provided at the lower end of the first cable 36, the hook 37 is connected to the dredging device 2, and the first cable 36 drives the dredging device 2 to move up and down along the cantilever mechanism 34, and is used to adjust the height of the dredging device 2 to adapt to the change of tidal range. The present invention installs the main beam 31 on the floating body 1, and is equipped with a lateral moving mechanism 32 and a guide rail 33, so that the cantilever mechanism 34 can move laterally on the main beam 31. The cantilever mechanism 34 drives the dredging device 2 to move up and down along the cantilever mechanism 34 through the first winch 35 and the first cable 36 to adapt to the dredging operation requirements under different tidal conditions. This design enables the dredging device 2 to operate stably under different tidal conditions, improving the adaptability and operational flexibility of the entire dredging system. Through the cooperation of the lateral moving mechanism 32 and the guide rail 33, the system can perform dredging operations in a larger range, improving work efficiency.

[0058] In some embodiments, the lateral movement mechanism 32 can adopt different driving modes, such as electric, hydraulic or mechanical drive, to adapt to different working environments and requirements. The length and structure of the cantilever mechanism 34 can also be adjusted according to the actual dredging requirements, and the length of the guide rail 33 can be adjusted according to the length of the floating body 1 to adapt to actual needs.

[0059] In some embodiments, the bottom of the cantilever mechanism 34 is rotatably connected to the lateral moving mechanism 32 via a rotating shaft, so that the cantilever mechanism 34 can rotate around the rotating shaft. For example, when the dredging operation begins, the cantilever mechanism 34 drives the dredging device 2 from a horizontal direction to a vertical direction, or when the dredging operation is completed, the dredging device 2 will be driven from a vertical direction to a horizontal direction through the cantilever mechanism 34.

[0060] Further, the cantilever mechanism 34 includes an upper arm assembly 341, the top of which is rotatably connected to the lateral moving mechanism 32, the upper arm assembly 341 is composed of a plurality of upper arm frames 3411 connected in sequence, and the upper arm frame 3411 is a vertically penetrating structure; a lower arm assembly 342, one end of which is connected to the other end of the upper arm assembly 341, the lower arm assembly 342 is composed of a plurality of lower arm frames 3421 connected in sequence, and the lower arm frame 3421 is a vertically penetrating structure, and the lower arm frame 3421 is provided with lifting rails 3422 around the inner periphery, and the dredging device 2 moves up and down along the lifting rails 3422. The cantilever mechanism 34 is composed of an upper arm assembly 341 and a lower arm assembly 342. The upper arm assembly 341 is rotatably connected to the lateral moving mechanism 32, and is formed by a plurality of upper arm frames 3411 connected in sequence to form a vertically penetrating structure. The lower arm assembly 342 is connected to the upper arm assembly 341, and is formed by a plurality of lower arm frames 3421 connected in sequence. The dredging device 2 moves up and down along the lower arm frame 3421 through the lifting track 3422 to ensure stable dredging operations under different tidal conditions. This design enables the cantilever mechanism 34 to have strong structural strength and flexibility, and can adapt to dredging needs in different working environments. Through the connection of multiple frames, the system has good stability, which improves the efficiency and reliability of dredging operations.

[0061] In some embodiments, the length and number of the upper arm frame 3411 and the lower arm frame 3421 can be adjusted according to specific dredging requirements. The material and structure of the lifting track 3422 can also be optimized according to different working environments.

[0062] Furthermore, the dredging device 2 includes a dredging head 21 and a lifting arm 22. The dredging head 21 is provided with a mud suction port 211 capable of sucking sludge, and a mud outlet 212 capable of discharging sludge onto the floating body 1; one end of the lifting arm 22 is provided with a movable pulley 23 and a first steel wire rope 24, one end of the first steel wire rope 24 is connected to the hook 37, passes around the movable pulley 23 and extends upward and is fixedly connected to the cantilever mechanism 34, the other end of the lifting arm 22 is connected to the dredging head 21, the lifting arm 22 includes an intermediate lifting beam 221, a cross beam 222 and two transition beams 223, a plurality of rollers 224 are respectively provided around the intermediate lifting beam 221 in the vertical direction, and the rollers 224 move up and down along the lifting track 3422; the cross beam 222 is connected to the intermediate lifting beam 221; one end of the two transition beams 223 is respectively rotatably connected to the cross beam 222, and the other end of the two transition beams 223 is connected to the dredging head 21. The dredging head 21 of the dredging device 2 sucks sludge through the sludge suction port 211, and discharges the sludge to the floating body 1 through the sludge discharge port 212. A movable pulley 23 and a first steel wire rope 24 are provided at one end of the lifting arm 22. One end of the first steel wire rope 24 is connected to the hook 37, and is fixedly connected to the cantilever mechanism 34 after passing the movable pulley 23, and the other end is connected to the dredging head 21. The middle lifting beam 221 of the lifting arm 22 moves up and down along the lifting track 3422 through the roller 224, ensuring that the dredging head 21 performs effective dredging operations at different heights. This design enables the dredging device 2 to flexibly adjust the position of the dredging head 21, thereby improving the efficiency and accuracy of the dredging operation. By rotating one end of the two transition beams 223 and connecting them to the cross beam 222 respectively, the angle of the dredging head 21 can be adjusted, so that the dredging effect is better, the sludge at the corners can be better cleaned, and the dredging efficiency is greatly improved.

[0063] It should be noted that the silt removal device 2 needs additional devices to discharge the silt onto the floating body 1 through the silt outlet 212, which is not shown in the drawings of the present invention.

[0064] In some embodiments, the shape and size of the dredging head 21 can be adjusted according to different silt types and dredging requirements. The structure and material of the lifting arm 22 can also be optimized according to the specific working environment to improve the reliability and durability of the system.

[0065] Further, the bottoming device 4 includes two bottoming mechanisms 41 respectively arranged on both sides of the dredging device 2 and parallel to each other; the movable pulley group 42 is arranged above the middle of the two bottoming mechanisms 41, that is, arranged directly below the hook 37, one end of the second steel wire rope 43 is connected to one bottoming mechanism 41, then bypasses the movable pulley group 42 and extends downward to connect to the other bottoming mechanism 41, so that the two bottoming mechanisms 41 form a whole; one end of the third steel wire rope 44 is connected to the hook 37, bypasses the movable pulley group 42 and extends upward to connect to the weighing sensor 5. In the present invention, the bottoming device 4 includes two bottoming mechanisms 41, which are respectively installed on both sides of the dredging device 2. The movable pulley group 42 is arranged above the middle of the two bottoming mechanisms 41, and the two bottoming mechanisms 41 are connected to a whole by the second steel wire rope 43, so that the two bottoming mechanisms 41 can be lifted and lowered synchronously. One end of the third steel wire rope 44 is connected to the hook 37, bypasses the movable pulley group 42 and connects to the weighing sensor 5. This design ensures that the bottom-touching device 4 can generate a stable bottom-touching signal when it touches the bottom of the water and transmit it to the control module. The present invention improves the stability and sensitivity of the bottom-touching device 4 by designing multiple bottom-touching mechanisms 41, ensures that the bottom-touching state can be accurately detected in different bottom environments, and improves the working efficiency and reliability of the entire dredging system.

[0066] In some embodiments, the number and position of the bottoming mechanism 41 can be adjusted according to specific working requirements. The specifications and materials of the movable pulley block 42 and the steel wire ropes 43 and 44 can also be selected according to different working conditions to optimize system performance.

[0067] Further, a plurality of guide wheels 25 are respectively provided on both sides of the dredging head 21 near the two bottoming mechanisms 41. After one end of the second steel wire rope 43 is connected to one of the bottoming mechanisms 41, it extends upward along the guide wheel 25, bypasses the movable pulley group 42, and extends downward to connect with the other bottoming mechanism 41, so that the two bottoming mechanisms 41 form a whole; by providing a plurality of guide wheels 25 on both sides of the dredging head 21 near the two bottoming mechanisms 41, the setting of the guide wheels 25 provides a guide path for the second steel wire rope 43. When the first hoist 35 drives the bottoming device 4 to move up and down, the second steel wire rope 43 can drive the two bottoming mechanisms 41 to move up and down synchronously, ensuring more stability during the movement; this not only improves the operational stability of the dredging head 21, but also effectively improves the dredging efficiency. At the same time, the setting of a plurality of guide wheels 25 can reduce the friction and resistance generated by the second steel wire rope 43 during the movement, and extend the service life of the second steel wire rope 43 and the dredging head 21. In addition, the design structure is simple, easy to maintain and operate, and reduces the equipment failure rate and maintenance cost.

[0068] In some embodiments, the number and position of the guide wheels 25 can be adjusted according to specific application scenarios. For example, in a specific working environment, the number of guide wheels 25 can be increased or decreased, or the position of the guide wheels 25 can be adjusted to optimize the path and motion trajectory of the second steel wire rope 43.

[0069] Furthermore, the deep-water gravel bed dredging system also includes a walking rail 11 and a second winch. The walking rail 11 is arranged on the floating body 1, and the walking rail 11 is arranged in parallel along the length direction of the floating body 1. The gantry trolley mechanism 3 moves back and forth along the walking rail 11; the second winch 6 is arranged on the floating body 1, and the second cable 7 on the second winch 6 bypasses the fixed pulley assembly 8 and is connected to the lower arm assembly 342. The second winch 6 is started, and the second cable 7 pulls the cantilever mechanism 34 to rotate around the lateral moving mechanism 32, so that the cantilever mechanism 34 is in a horizontal direction or a vertical direction. In the present invention, the walking rail 11 is arranged in parallel along the length direction of the floating body 1, so that the gantry trolley mechanism 3 can drive the dredging device 2 to move back and forth along the walking rail 11, which can cover a larger dredging range and improve the dredging efficiency.

[0070] In some embodiments, the length and position of the running rail 11 can be adjusted according to the size and dredging requirements of the floating body 1. The material and driving mode of the running rail 11 can also be optimized according to the specific working environment to improve the durability and ease of operation of the system.

[0071] The dredging construction method of the deep-water gravel bed dredging system comprises the following steps:

[0072] S101, install the gantry trolley mechanism 3 on the floating body 1, install the first winch 35 on the gantry trolley mechanism 3, connect the dredging device 2 and the bottoming device 4 to the first winch 35 respectively, and connect the monitoring device to the bottoming device 4. After the assembly is completed, debug the entire dredging system; locate the deep-water gravel bed dredging system through the GPS positioning system, and move the deep-water gravel bed dredging system to the water area to be dredged;

[0073] S102, after successful debugging, the second cable 7 on the second winch 6 drives the cantilever mechanism 34 to rotate around the lateral moving mechanism 32 and drives the silt removal device 2 to change from a horizontal direction to a vertical direction;

[0074] S103, lowering the silt removal device 2 by the first winch 35 and starting the weighing sensor 5 and the control module, detecting the stress state of the bottoming device 4 on the weighing sensor 5 in real time by the weighing sensor 5, and sending a weight signal to the control module in real time by the weighing sensor 5;

[0075] S104, when the weighing sensor 5 detects that the bottoming device 4 has no force on the weighing sensor 5, the weighing sensor 5 sends a first weight signal to the control module; when the weighing sensor 5 detects that the gravity of the bottoming device 4 completely acts on the weighing sensor 5, the weighing sensor 5 sends a second weight signal to the control module; when the weighing sensor 5 detects that the gravity of the bottoming device 4 partially acts on the weighing sensor 5, the weighing sensor 5 sends a weight signal between the first weight signal and the second weight signal to the control module; wherein the control module controls the gantry trolley mechanism 3 to drive the dredging device 2 and the bottoming device 4 to rise and fall synchronously according to the weight signal sent by the weighing sensor 5 received in real time, so that the weight signal of the weighing sensor 5 is adjusted in real time to be between the first weight signal and the second weight signal, thereby completing the real-time adjustment of the operating depth of the dredging device 2.

[0076] S105, when it is determined that the dredging device 2 is at the operating depth, the dredging head 21 is started to suck in the sludge and discharge it to the floating body 1 through the sludge outlet; when the tidal range or other environmental changes occur during the dredging operation, the step S104 is repeated to complete the adjustment of the dredging operation depth of the dredging device 2, so that the dredging device 2 is always at the dredging operation depth for dredging, thereby ensuring the continuity and stability of the dredging operation;

[0077] S106, after the dredging device 2 completes the dredging operation in a certain area, the gantry trolley mechanism 3 drives the dredging device 2 to move through the travel guide rail on the floating body 1, and adjusts the position of the dredging device 2 to cover a new area.

[0078] S107, after the dredging operation is completed, the dredging head 21 is stopped, and the dredging device 2 is lifted upward to a safe height by the first winch 35;

[0079] S108. After the gravel bed dredging operation is completed, the dredging effect is inspected and accepted. After the inspection is successful, the second cable 7 on the second winch 6 pulls the cantilever mechanism 34 to rotate around the lateral moving mechanism 32 and drives the dredging device 2 from the vertical direction to the horizontal direction, and the dredging system is disassembled, and the parts of the entire dredging system are used for other purposes.

[0080] In some embodiments, when the floating body 1 is a dredging hull, after the entire dredging system is disassembled, the dredging hull can be used for channel dredging, water body restoration, flood control, resource recovery, etc.

[0081] The dredging construction method of the present invention uses GPS to perform system positioning to ensure that the dredging system performs dredging operations at the correct position. The weighing sensor 5, the bottoming device 4 and the control module provide real-time data to determine the dredging operation depth of the dredging device 2. According to the weight signal sent by the weighing sensor 5 to the control module, the action of the first winch 35 is automatically controlled to adjust the operating depth of the dredging device 2 to ensure that it performs dredging operations at the optimal position, which greatly improves the operating efficiency and accuracy of the deep-water gravel bed dredging system; it can monitor and adjust the state of the dredging device 2 in real time to ensure the continuity and stability of the dredging process, and reduce the complexity and errors of manual operation.

[0082] In some embodiments, by setting up a GPS positioning system, the position information of the deep-water gravel bed dredging system is obtained in real time to ensure the accuracy and coverage of the dredging work. The monitoring device and the gantry trolley mechanism 3 are linked to ensure that the dredging device 2 always maintains the dredging operation depth for operation. Through the precise positioning of the GPS positioning system, the deep-water gravel bed dredging system can maintain the correct position on the water surface and cover every corner of the target area during the dredging process to prevent omission or repeated dredging.

[0083] In some embodiments, when the dredging device 2 is performing dredging operations, the dredging head 21 is started, the sludge is sucked in through the sludge suction port 211 and then discharged to the floating body 1 through the sludge discharge port 212. This process requires another set of equipment to discharge sludge from the sludge discharge port 212 to the floating body 1, which is not drawn in the figure.

[0084] In some embodiments, the method for controlling the dredging operation depth of the dredging device 2 in the dredging device operation depth control step is:

[0085] a. When the weight signal is set between 0 and 1, it indicates that the dredging device 2 is at the dredging operation depth, wherein the weight signal does not include 0 and 1. When the weight signal is determined to be 0 or 1, it indicates that the dredging device 2 is not at the dredging operation depth. The specific determination is as follows: when the weighing sensor 5 detects that the bottoming device 4 has no force on the weighing sensor 5, the weighing sensor 5 sends a weight signal of 0 to the control module; when the control module receives a weight signal of 0, it determines that the bottoming device 4 is in a completely bottoming state, and the dredging device 2 is not at the dredging operation depth. At this time, the first winch 35 is started to lift the bottoming device 4 upward, and the dredging device 2 is lifted upward at the same time. The weight signal is monitored in real time by the control module. When the weight signal is finally displayed to be between 0 and 1, the adjustment of the dredging operation depth of the dredging device 2 is completed;

[0086] b. When the weighing sensor 5 detects that the gravity of the bottoming device 4 fully acts on the weighing sensor 5, the weighing sensor 5 sends a weight signal of 1 to the control module; when the control module receives the weight signal of 1, it is determined that the bottoming device 4 is in a completely disengaged state and the dredging device 2 is not at the dredging operation depth. At this time, the first winch 35 is started to lower the bottoming device 4 and the dredging device 2 at the same time. The weight signal is monitored in real time by the control module. When the weight signal is finally displayed to be between 0 and 1, the adjustment of the dredging operation depth of the dredging device 2 is completed;

[0087] c. When the weighing sensor 5 detects that the gravity of the bottoming device 4 acts on the weighing sensor 5, the weighing sensor 5 sends a weight signal between the first weight signal and the second weight signal to the control module. When the control module receives the weight signal between the first weight signal and the second weight signal, it determines that the bottoming device 4 is between the complete bottoming state and the complete disengagement state. At this time, the dredging device 2 is at the dredging operation depth, and the control module does not need to control the action of the first winch.

[0088] In some embodiments, after the dredging device 2 completes the dredging operation in a section of the area, the gantry trolley mechanism 3 drives the dredging device 2 to move through the walking guide rail 11 on the floating body 1, and adjusts the position of the dredging device 2 to cover the new area; if a large-scale dredging operation is required, it is necessary to rely on the mobile floating body 1 to carry out the dredging operation.

[0089] The technical features of the above-described embodiments may be arbitrarily combined. To make the description concise, not all possible combinations of the technical features in the above-described embodiments are described. However, as long as there is no contradiction in the combination of these technical features, they should be considered to be within the scope of this specification.

[0090] The above-mentioned embodiments only express several implementation methods of the present invention, and the descriptions thereof are relatively specific and detailed, but they cannot be understood as limiting the scope of the invention patent. It should be pointed out that, for ordinary technicians in this field, several variations and improvements can be made without departing from the concept of the present invention, and these all belong to the protection scope of the present invention. Therefore, the protection scope of the patent of the present invention shall be subject to the attached claims.

Claims

1. Deepwater gravel bed dredging system, characterized in that: include: floating body; A gantry trolley mechanism is arranged on the floating body; A dredging device is connected to the gantry trolley mechanism and is controlled by the gantry trolley mechanism to move up and down to perform dredging operations; The bottom-touching device is connected to the gantry trolley mechanism through a cable, and is controlled by the gantry trolley mechanism to rise and fall synchronously with the dredging device; the bottom-touching device enters the water deeper than the dredging device, and first contacts the surface of the dredging area after entering the water; A monitoring device connected to the bottoming device; when the bottoming device is in a completely bottoming state, the bottoming device has no force on the monitoring device; when the bottoming device is in a completely detached state, the gravity of the bottoming device completely acts on the monitoring device; when the bottoming device is between the completely bottoming state and the completely detached state, part of the gravity of the bottoming device acts on the monitoring device; Wherein, the gantry trolley mechanism comprises: A main beam is installed on the floating body, and a lateral movement mechanism and a guide rail for the lateral movement mechanism to move along the main beam are provided on the main beam; The cantilever mechanism is a frame structure rotatably connected to the lateral moving mechanism. The cantilever mechanism is in a vertical state at least in a working state. A first winch is provided on the top of the cantilever mechanism. A first cable that can be retracted is provided on the first winch. A hook is provided at the lower end of the first cable. The hook is connected to the dredging device. The first cable drives the dredging device to move up and down along the cantilever mechanism, and is used to adjust the height of the dredging device to adapt to changes in tidal range. The desilting device comprises: The dredging head is provided with a sludge suction port capable of sucking in sludge, and a sludge discharge port capable of discharging the sludge onto the floating body; A lifting arm, one end of which is provided with a movable pulley and a first steel wire rope, one end of the first steel wire rope is connected to the hook, passes over the movable pulley, extends upward, and is fixedly connected to the cantilever mechanism, and the other end is connected to the dredging head; The monitoring device includes a weighing sensor and a control module, wherein the weighing sensor is fixed on the gantry trolley mechanism, the weighing sensor is connected to the bottoming device, and the control module is electrically connected to the weighing sensor and the gantry trolley mechanism; The bottoming device comprises: Two bottom contact mechanisms are respectively arranged on two sides of the dredging head and are parallel to each other; A movable pulley block is arranged above and in the middle of the two bottoming mechanisms; A second steel wire rope, one end of which is connected to one of the bottoming mechanisms and then extends upward, passes over the movable pulley block, and extends downward to be connected to the other bottoming mechanism so that the two bottoming mechanisms form a whole; A third steel wire rope, one end of which is connected to the hook, passes around the movable pulley block and extends upward to be connected to the weighing sensor; Among them, the monitoring device determines the real-time contact state of the bottoming device and the surface of the area to be dredged according to the force change of the monitoring device, and controls the gantry trolley mechanism to drive the dredging device and the bottoming device to rise and fall synchronously, so that the bottoming device is adjusted in real time to be between a completely bottoming state and a completely disengaged state, so that the dredging device is at the operating depth.

2. The deep-water gravel bed dredging system according to claim 1, characterized in that: The weighing sensor is configured as follows: when the weighing sensor detects that the bottoming device has no force on the weighing sensor, the weighing sensor sends a first weight signal to the control module; when the weighing sensor detects that the gravity of the bottoming device completely acts on the weighing sensor, the weighing sensor sends a second weight signal to the control module; when the weighing sensor detects that the gravity of the bottoming device partially acts on the weighing sensor, the weighing sensor sends a weight signal between the first weight signal and the second weight signal to the control module; the control module is configured as follows: according to the weight signal sent by the weighing sensor received in real time, the gantry trolley mechanism is controlled to drive the dredging device and the bottoming device to rise and fall synchronously, so that the weight signal of the weighing sensor is adjusted in real time to be between the first weight signal and the second weight signal, thereby completing the real-time adjustment of the operating depth of the dredging device.

3. The deep-water gravel bed dredging system according to claim 1, characterized in that: The cantilever mechanism comprises: An upper arm assembly, the top of which is rotatably connected to the lateral moving mechanism, the upper arm assembly is composed of a plurality of upper arm frames connected in sequence, and the upper arm frames are in a vertically penetrating structure; The lower arm assembly is connected to the bottom end of the upper arm assembly. The lower arm assembly is composed of a plurality of lower arm frames connected in sequence. The lower arm frames are of a vertical through structure. Lifting tracks are arranged around the interior of the lower arm frames. The dredging device moves up and down along the lifting tracks.

4. The deep-water gravel bed dredging system according to claim 3, characterized in that: The lifting arm comprises: The middle lifting beam is provided with a plurality of rollers in the vertical direction around the periphery, and the rollers move up and down along the lifting track; A cross beam connected to the intermediate lifting beam; Two transition beams, one end of the two transition beams is rotatably connected to the cross beam respectively, and the other end of the two transition beams is connected to the dredging head.

5. The deep-water gravel bed dredging system according to claim 1, characterized in that: The dredging head is provided with a plurality of guide wheels on both sides close to the two bottoming mechanisms. One end of the second steel wire rope is connected to one of the bottoming mechanisms and then extends upward along the guide wheel, bypasses the movable pulley set, extends downward and is connected to the other bottoming mechanism so that the two bottoming mechanisms form a whole.

6. The deep-water gravel bed dredging system according to claim 3, characterized in that: Also includes: A running guide rail is provided on the floating body, the running guide rail is arranged parallel to the length direction of the floating body, and the gantry trolley mechanism moves back and forth along the running guide rail; The second winch is arranged on the floating body. The second cable on the second winch passes around the fixed pulley assembly and is connected to the lower arm assembly. When the second winch is started, the second cable pulls the cantilever mechanism to rotate around the lateral moving mechanism, so that the cantilever mechanism is in a horizontal direction or a vertical direction.

7. The dredging construction method of the deep-water gravel bed dredging system is characterized in that: The deep-water gravel bed dredging system according to any one of claims 1 to 6 is used for dredging construction, and the dredging construction method comprises the following steps: Assembly and debugging steps: install the gantry trolley mechanism on the floating body, install the first winch on the gantry trolley mechanism, connect the dredging device and the bottoming device to the first winch respectively, connect the monitoring device to the bottoming device, and after the assembly is completed, debug the entire dredging system; Steps for lowering the dredging device: after successful debugging, the dredging device is driven from the horizontal direction to the vertical direction by the gantry trolley mechanism, and the dredging device is lowered, and the dredging device is controlled to be at the dredging operation depth by the monitoring device; Dredging operation steps: start the dredging device, suck in the sludge and discharge the sludge onto the floating body; during the dredging operation, the dredging device is controlled by the monitoring device to always be at the dredging operation depth; Among them, the specific steps of controlling the dredging device to be at the dredging operation depth through the monitoring device are as follows: when the monitoring device detects that the bottoming device has no force on the monitoring device, it is determined that the bottoming device is in a completely bottoming state, and the monitoring device controls the gantry trolley mechanism to lift the bottoming device upward, so that the bottoming device is between the completely bottoming state and the completely disengaged state. At this time, the dredging device is correspondingly at the dredging operation depth, and the dredging operation depth of the dredging device is adjusted; when the monitoring device detects that the gravity of the bottoming device completely acts on the monitoring device, it is determined that the bottoming device is in a completely disengaged state, and the monitoring device controls the gantry trolley mechanism to lower the bottoming device, so that the bottoming device is between the completely bottoming state and the completely disengaged state. At this time, the dredging device is correspondingly at the dredging operation depth, and the dredging operation depth of the dredging device is adjusted; Acceptance and disassembly steps: After completing the gravel base bed dredging operation, an acceptance inspection will be carried out. After successful acceptance, the dredging system will be disassembled.

8. The dredging construction method of the deep-water gravel bed dredging system according to claim 7, characterized in that: The specific steps of the monitoring device controlling the movement of the gantry trolley mechanism according to the change of the force applied to the monitoring device by the bottoming device are as follows: a. When the weighing sensor detects that the bottoming device has no force on the weighing sensor, the weighing sensor sends a first weight signal to the control module; when the control module receives the first weight signal, it determines that the bottoming device is in a completely bottoming state, and at this time the control module controls the gantry trolley mechanism to lift the bottoming device upward, so that the weight signal on the control module is between the first weight signal and the second weight signal, and the adjustment of the operating depth of the dredging device is completed; b. When the weighing sensor detects that the gravity of the bottoming device fully acts on the weighing sensor, the weighing sensor sends a second weight signal to the control module; when the control module receives the second weight signal, it determines that the bottoming device is in a completely disengaged state, and at this time the control module controls the gantry trolley mechanism to lower the bottoming device, so that the weight signal on the control module is between the first weight signal and the second weight signal, thereby completing the adjustment of the operating depth of the dredging device; c. When the weighing sensor detects that the gravity of the bottoming device acts on the weighing sensor, the weighing sensor sends a weight signal between the first weight signal and the second weight signal to the control module. When the control module receives the weight signal between the first weight signal and the second weight signal, it determines that the bottoming device is between the complete bottoming state and the complete detachment state. At this time, the dredging device is at the dredging operation depth, and the control module does not need to control the movement of the gantry trolley mechanism.

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