Combined flexible dredging system and construction method thereof

Abstract

The present invention discloses a combined flexible dredging system and a construction method thereof, and belongs to the technical field of underwater bed construction. The system comprises a traction platform, a mobile platform floating on the water surface, a lifting mechanism installed on the mobile platform, a dredging device connected to the lifting mechanism, and a traction device, wherein the lifting mechanism controls the dredging device to move up and down; the traction device comprises two traction mechanisms, and the traction mechanism comprises a flexible connector, wherein the two traction mechanisms are respectively arranged on the traction platform and located on the left and right sides of the mobile platform, and the two flexible connectors are respectively connected to the left and right ends of the mobile platform, and the flexible connector is retractable in the left and right directions. The present invention solves the technical problem that the dredging device is connected to the dredging ship in the existing dredging technology, and since the dredging ship itself is large and wide in size, when it is subjected to adverse weather conditions such as wind and waves, the dredging ship is prone to heeling, resulting in a large height difference between one side of the dredging ship and the other side, thereby affecting the efficiency and stability of the dredging operation.

Description

Technical Field

[0001] The invention belongs to the technical field of underwater bed construction, and in particular relates to a combined flexible dredging system and a construction method thereof. Background Art

[0002] In existing dredging technologies, common dredging devices are usually connected to the dredging vessel itself, and the power for dredging operations comes from the dredging vessel itself. However, due to the large size and width of the dredging vessel itself, when encountering adverse weather conditions such as wind and waves, the dredging vessel is prone to heeling. This heeling phenomenon will cause a large height difference between one side of the dredging vessel and the other side, thereby affecting the efficiency and stability of the dredging operation.

[0003] During the dredging process, the heeling of the dredging vessel will not only increase the difficulty of operation, but also may cause the working parts of the dredging device to be unable to contact the bottom of the water smoothly and continuously, affecting the dredging effect. At the same time, the height difference caused by the heeling of the dredging vessel will cause the dredging pipeline and other parts to bear additional stress, increasing the loss and failure risk of the equipment. In addition, the movement and positioning of the dredging vessel in the heeling state also become more complicated and difficult, increasing the workload of the operators and safety hazards.

[0004] At present, there is no effective technical solution to solve the problem of heeling of dredging vessels under adverse weather conditions, and it is impossible to ensure the efficiency and stability of dredging operations. Therefore, there is an urgent need for a new dredging system and its construction method to overcome the deficiencies in the existing technology and provide a technical solution that can stably and efficiently perform dredging operations under various weather conditions. 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 combined flexible dredging system and a construction method thereof, which solves the technical problem that in the existing dredging technology, the dredging device is connected to the dredging vessel. Since the dredging vessel itself is large and wide, when subjected to adverse weather conditions such as wind and waves, the dredging vessel is prone to heeling, resulting in a large height difference between one side of the dredging vessel and the other side, thereby affecting the efficiency and stability of the dredging operation. The present invention has the characteristics of being able to perform dredging operations stably and efficiently under various weather conditions, being less affected by tidal differences, and greatly reducing the heeling phenomenon.

[0007] On one hand, the present invention discloses a combined flexible dredging system, comprising a traction platform, a mobile platform floating on the water surface, a lifting mechanism installed on the mobile platform, a dredging device connected to the lifting mechanism, and a traction device, wherein the size of the mobile platform is smaller than that of the traction platform, and the lifting mechanism controls the dredging device to move up and down to perform dredging operations; the traction device comprises two traction mechanisms, and the traction mechanism comprises flexible connecting members, the two traction mechanisms are respectively arranged on the traction platform and located on the left and right sides of the mobile platform, the two flexible connecting members are respectively connected to the left and right ends of the mobile platform, and the flexible connecting members are retractable in the left and right directions; wherein, when one of the two flexible connecting members is extended, the other flexible connecting member is contracted synchronously to drive the mobile platform to move back and forth between the two traction mechanisms; the traction platform moves autonomously to drive the mobile platform to move back and forth, or the traction device moves relative to the traction platform in the front and back directions to drive the mobile platform to move back and forth.

[0008] In some embodiments, the traction platform is a movable floating body or a fixed quay. When the traction platform is a movable floating body, the movable platform is arranged parallel to one side of the movable floating body, and the traction mechanism further includes a traction drive and a guide member, and the traction drive is provided with the flexible connection member that can be retracted and released by the traction drive; the traction drive is arranged on the guide member, and a plurality of steering wheels are arranged on the guide member, and the flexible connection member bypasses the plurality of steering wheels and is connected to the movable platform, wherein the direction of the flexible connection member is converted into a left and right direction after bypassing the plurality of steering wheels, so that the flexible connections on the two traction drives drive the movable platform to move back and forth left and right; when the traction platform is a fixed quay, the movable platform is arranged between the fixed quays, and the traction mechanism further includes a traction drive, and the traction drive is provided with the flexible connection member that can be retracted and released by the traction drive; the two traction drives are respectively arranged on the fixed quay, and the two flexible connections are respectively connected to the left and right ends of the movable platform, thereby driving the movable platform to move back and forth left and right.

[0009] In some embodiments, when the traction platform is a movable float, the movable float drives the mobile platform to move back and forth; when the traction platform is the fixed shore, the traction mechanism also includes a first guide rail, two first guide rails are respectively arranged on the fixed shore on the left and right sides, two traction drive components are respectively arranged on the two first guide rails, and the two traction drive components drive the mobile platform to move back and forth along the two first guide rails.

[0010] In some embodiments, the mobile platform is a U-shaped pontoon, and a second winch is provided on the traction platform on one side of the opening of the pontoon. The second cable on the second winch is connected to the lifting mechanism. When the second winch is started, the second cable pulls the lifting mechanism to rotate along the direction of the pontoon opening, so that the lifting mechanism can achieve a horizontal or vertical transformation.

[0011] In some embodiments, the lifting mechanism includes a mounting bracket and a cantilever mechanism, a plurality of pulleys are provided at the bottom of the mounting bracket, and second guide rails are provided on both sides of the U-shape of the pontoon respectively, and the mounting bracket is arranged on the second guide rails, and the mobile platform is in a horizontal state by adjusting the position of the mounting bracket on the pontoon, and a cantilever beam is provided on the top of the mounting bracket; a lifting plate is provided on the top of the cantilever mechanism, and the lifting plate is rotatably connected to the cantilever beam, and the cantilever mechanism is in a vertical state at least in a working state, and a first winch is provided on the top of the cantilever mechanism, and a first cable that can be retracted and released is provided on the first winch, and a hook is provided at the lower end of the first cable, and the hook is connected to the dredging device, and the first cable drives the dredging device to move up and down along the cantilever mechanism, so as to adjust the height of the dredging device to adapt to changes in tidal range.

[0012] 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 connected to the lifting plate, 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 arm frame, and the dredging device moves up and down along the lifting rails.

[0013] 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. 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. The intermediate lifting beam is provided with a plurality of rollers in the vertical direction on all sides, 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.

[0014] In some embodiments, a bottoming device is also included, which is connected to the hook on the first hoist and is controlled by the first hoist to rise and fall synchronously with the dredging device; the bottoming device is deeper in the water than the dredging device, and first contacts the surface of the dredging area after entering the water; the bottoming device includes two bottoming mechanisms, a movable pulley block, 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 block is arranged above the two bottoming mechanisms at intervals; one end of the second steel wire rope is connected to one of the bottoming mechanisms and then bypasses the movable pulley block 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 block and extends upward.

[0015] In some embodiments, a control module and a weighing sensor are further included. The weighing sensor is fixed on the lifting mechanism, the weighing sensor is connected to the bottoming device through the third steel wire rope, the weight signal of the bottoming device is detected by the weighing sensor, and the control module is electrically connected to the weighing sensor and the lifting mechanism; wherein 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 When the sensor is used, the weighing sensor sends a second weight signal to the control module; when the weighing sensor detects that the gravity part 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; the control module is configured to: according to the weight signal sent by the weighing sensor received in real time, control the lifting 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.

[0016] Another aspect of the present invention discloses a construction method of a combined flexible dredging system, the construction method comprising the following steps:

[0017] S101, installing the traction device and the second winch on the traction platform, installing the lifting mechanism on the mobile platform, installing the first winch on the lifting mechanism, connecting the dredging device and the bottoming device to the first winch respectively, connecting the weighing sensor to the bottoming device, flexibly connecting the traction platform and the mobile platform through the traction device, and after the assembly is completed, debugging the entire dredging system;

[0018] S102, start the second winch, so that the second cable pulls the lifting mechanism to rotate along the opening direction of the pontoon, so that the lifting mechanism changes from a horizontal direction to a vertical direction, and slides the mounting bracket along the second guide rail to adjust the position of the mounting bracket on the pontoon, so that the mobile platform is in a horizontal state, thereby putting the cantilever mechanism in a vertical state;

[0019] S103, lowering the dredging device to the dredging operation depth through the lifting mechanism;

[0020] S104, when the dredging device is at the operating depth, the dredging device is started to suck in and discharge the sludge; according to the change of tidal range, the operating depth of the dredging device is adjusted in real time through the lifting mechanism to ensure the continuity and stability of the dredging operation;

[0021] S105, the mobile platform is driven to move back and forth left and right by the traction device, thereby driving the dredging device to complete a part of the dredging operation. After the dredging device completes this part of the dredging range, when the traction platform is a movable floating body, the movable floating body is started, and the mobile platform is driven by the movable floating body to move back and forth to the next dredging range, and the mobile platform is driven to move back and forth left and right by the traction device again, thereby driving the dredging device to move back and forth left and right to complete the dredging operation within this dredging range, and this is repeated until all the dredging ranges to be completed; when the traction platform is a fixed shore wall, the two traction drive members drive the mobile platform to move back and forth along the two first guide rails to the next dredging range, and the mobile platform is driven to move back and forth left and right by the traction device again, thereby driving the dredging device to move back and forth left and right to complete the dredging operation within this dredging range, and this is repeated until all the dredging ranges to be completed;

[0022] S106. After the dredging operation is completed, the dredging device is lifted up to a safe height by the first winch to inspect the dredging effect. After the inspection is successful, the cantilever mechanism drives the dredging device from a vertical direction to a horizontal direction by the second winch, and the dredging system is disassembled.

[0023] Compared with the prior art, the present invention has the following beneficial effects:

[0024] 1. On the one hand, the present invention provides a combined flexible dredging system. By installing a dredging device on a mobile platform, due to the small size of the mobile platform, especially the floating box, when affected by the tidal range or the environment, the heeling effect is relatively small compared to the larger and wider dredging ship; therefore, the stability and continuity of the dredging operation can be greatly improved by controlling the dredging device through the floating box to perform dredging operations, ensuring that the dredging operation can be carried out stably and efficiently under different tidal range conditions; since the lighter floating box requires less power to maintain the operation, it can greatly reduce energy consumption and reduce operating costs; it can also reduce the wear of equipment parts, extend the service life of the equipment, and reduce the frequency of maintenance and replacement; at the same time, through the design of the traction device, the coordinated work of the traction platform and the mobile platform is realized, and the dredging efficiency and operation coverage are improved. The present invention has shown through experiments that if the deck width of the existing dredging ship is 20 meters, when it is heeled due to the tidal range change, the height difference caused by the heel of the floating box will be reduced by about 70% relative to the height difference caused by the heel of the dredging ship.

[0025] 2. In the present invention, when the mobile platform is a movable floating body, it can be used in dredging operations in wider / larger inland rivers, lakes, seawater, etc. By setting the traction drive and guide members in the traction device, the left and right reciprocating movement of the floating box can be realized, thereby driving the dredging device to move back and forth left and right. This design increases the flexibility and coverage of the dredging operation, allowing the dredging system to more efficiently handle silt in different areas. When the mobile platform is a fixed shore, it can be used in dredging operations in narrower / smaller inland rivers, lakes, etc. The left and right reciprocating movement of the floating box can be realized directly through the flexible connector on the traction drive. The present invention has a wide range of applications, a wide coverage of dredging operations, and high dredging efficiency.

[0026] 3. The design of the bottom-touching device in the present invention ensures that the dredging device can always maintain a suitable height with the gravel layer, avoiding excessive dredging that stirs the gravel layer or insufficient dredging, thereby improving the dredging effect and the accuracy of the system. At the same time, it can adapt to deep water environments and avoid the use of other auxiliary facilities such as contact switches in the prior art. Due to the influence of tidal changes and other factors in deep water environments, insufficient protection occurs, resulting in inaccurate measurement results and excessive dredging that stirs the gravel layer or insufficient dredging that fails to achieve the expected effect.

[0027] 4. On the other hand, the present invention provides a construction method for a combined flexible dredging system, which ensures that the dredging system can be accurately moved to the area to be dredged by GPS positioning. The weight data and bottom contact signal of the bottom contact device are monitored in real time to ensure that the dredging device can always maintain the set working height, and can adapt to the large water depth environment and various tidal changes, thereby improving the efficiency and effect of the dredging operation. The height adjustment of the first winch ensures the continuity and stability of the dredging operation under different tidal conditions. On the other hand, through the traction drive and the flexible connector, it is ensured that the mobile platform, especially the pontoon, can move back and forth to cover a larger range of dredging operation areas; and when the traction platform is a movable floating body, the movable floating body is started, and the movable floating body drives the mobile platform to move back and forth to the next dredging range; when the traction platform is a fixed shore wall, the two traction drive members drive the mobile platform to move back and forth along the two first guide rails to the next dredging range; and then adjust the action of the traction drive and the first winch according to the actual situation to ensure the comprehensive coverage of the dredging operation and improve the dredging efficiency and effect. After the operation is completed, the system can quickly switch the operation status, reduce preparation and finishing time, and improve overall operation efficiency. BRIEF DESCRIPTION OF THE DRAWINGS

[0028] 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:

[0029] Figure 1 A schematic diagram of the structure of a combined flexible silt removal system provided by an embodiment of the present invention;

[0030] Figure 2 Another structural schematic diagram of the combined flexible silt removal system provided by an embodiment of the present invention;

[0031] Figure 3 A schematic diagram of a partial structure of a traction device provided by an embodiment of the present invention;

[0032] Figure 4 A schematic diagram of the structure of a buoyancy box and a lifting mechanism provided by an embodiment of the present invention;

[0033] Figure 5 A schematic diagram of the structure of the connection between the first hoist and the dredging device and the first hoist and the bottoming device provided in an embodiment of the present invention;

[0034] Figure 6 A schematic diagram of the structure of a lifting mechanism provided by an embodiment of the present invention;

[0035] Figure 7 A front view of a lifting mechanism provided by an embodiment of the present invention;

[0036] Figure 8 A schematic diagram of the structure of an upper arm assembly provided by an embodiment of the present invention;

[0037] Fig. 9 A schematic structural diagram of a lower arm assembly provided by an embodiment of the present invention;

[0038] Fig.10 A schematic diagram of the structure of a dredging device provided in an embodiment of the present invention;

[0039] Fig.11 A schematic diagram of the structure of a lifting arm provided in an embodiment of the present invention;

[0040] Fig.12 A schematic diagram of the structure of a dredging head provided by an embodiment of the present invention;

[0041] Fig.13 A schematic diagram of the structure of a bottom contact device provided by an embodiment of the present invention;

[0042] Fig.14 A flow chart of a construction method provided by an embodiment of the present invention;

[0043] In the above figures:

[0044] 1-traction platform; 2-mobile platform; 21-second guide rail; 3-traction device; 31-traction drive member; 32-flexible connector; 33-guide member; 34-steering wheel; 35-first guide rail; 4-dredging device; 41-dredging head; 411-mud suction port; 412-mud outlet; 42-lifting arm; 421-middle lifting beam; 422-cross beam; 423-transition beam; 424-roller; 43-movable pulley; 44-first wire rope; 5-lifting mechanism; 51 -mounting bracket; 52-cantilever mechanism; 521-upper arm assembly; 5211-upper arm frame; 522-lower arm assembly; 5221-lower arm frame; 5222-lifting track; 53-first winch; 54-first cable; 55-hook; 56-cantilever beam; 57-lifting plate; 6-bottoming device; 61-bottoming mechanism; 62-movable pulley block; 63-second steel wire rope; 64-third steel wire rope; 7-weighing sensor; 8-second winch; 9-second cable. DETAILED DESCRIPTION

[0045] 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.

[0046] 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.

[0047] 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.

[0048] 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.

[0049] The embodiment of the present invention provides a combined flexible silt removal system, referring to Figure 1-Figure 14As shown, the combined flexible dredging system at least includes: a traction platform 1, a mobile platform 2 floating on the water surface, a lifting mechanism 5 installed on the mobile platform 2, a dredging device 4 and a traction device 3. The size of the mobile platform 2 is smaller than that of the traction platform 1. The dredging device 4 is connected to the lifting mechanism 5 and is controlled by the lifting mechanism 5 to move up and down to perform dredging operations; the traction device 3 includes two traction mechanisms, and the traction mechanism includes a flexible connector 32. The two traction mechanisms are respectively arranged on the traction platform 1 and located on the left and right sides of the mobile platform 2. The two flexible connectors 32 are respectively connected to the left and right ends of the mobile platform 2, and the flexible connector 32 is retractable in the left and right directions; wherein, when one of the two flexible connectors 32 is extended, the other flexible connector 32 is synchronously contracted to drive the mobile platform 2 to move back and forth between the two traction mechanisms; the traction platform 1 moves autonomously to drive the mobile platform 2 to move back and forth, or the traction device 3 moves relative to the traction platform 1 in the front and back directions to drive the mobile platform 2 to move back and forth. The present invention installs a dredging device 4 on a mobile platform 2. Since the size of the mobile platform 2, especially the pontoon, is small, when affected by the tidal range or the environment, the heeling effect is relatively small compared to a dredging ship with a larger size and a wider width. Therefore, the stability and continuity of the dredging operation can be greatly improved by controlling the dredging device 4 through the mobile platform 2, especially the smaller pontoon, to perform dredging operations, ensuring that the dredging operation can be performed stably and efficiently under different tidal range conditions. On the other hand, since the smaller pontoon requires less power to maintain the operation, it can greatly reduce energy consumption and reduce operating costs. It can also reduce the wear of equipment components, extend the service life of the equipment, and reduce the frequency of maintenance and replacement. At the same time, through the design of the traction device 3, the coordinated work of the traction platform 1 and the mobile platform 2 is achieved, and the dredging efficiency and the coverage of the operation are improved. The present invention has shown through experiments that if the deck width of the existing dredging ship is 20 meters, when the tidal range changes and the heeling occurs, the height difference caused by the heeling of the pontoon will be reduced by about 70% relative to the height difference caused by the heeling of the dredging ship.

[0050] In some embodiments, the traction platform 1 is a dredging vessel or a fixed quay wall, with a certain bearing capacity and driving force, which can drive the mobile platform 2 to move. The size of the mobile platform 2 is smaller than that of the traction platform 1, but the mobile platform 2 can carry the dredging device 4 and the lifting mechanism 5, and can make the mobile platform 2 meet the freeboard requirements.

[0051] In some embodiments, Figure 2As shown, when dredging is carried out in a narrower / smaller river, the traction platform 1 can use a fixed bank wall and can directly drive the pontoon to move back and forth left and right through the traction device 3. When the dredging operation in this area is completed, the pontoon can be driven by two traction drive components 31 to move back and forth along the first guide rail 35 until it moves to the next dredging range.

[0052] In some embodiments, the traction drive member 31 may be a winch, and the flexible connection member 32 is a cable wound around the winch. The cable on the winch drives the mobile platform 2 to move back and forth left and right to achieve dredging operations.

[0053] The front, rear, left and right directions mentioned in the present invention are as follows: Figure 1 , Figure 2 Directions shown in .

[0054] Furthermore, the traction platform 1 is a movable floating body or a fixed quay wall. When the traction platform 1 is a movable floating body, the mobile platform 2 is arranged parallel to one side of the movable floating body. The traction mechanism also includes a traction drive 31 and a guide 33. The traction drive 31 is provided with a flexible connection 32 that can be retracted by the traction drive 31. The traction drive 31 is arranged on the guide 33. The guide 33 is provided with a plurality of steering wheels 34. The flexible connection 32 bypasses the plurality of steering wheels 34 to connect with the mobile platform 2. The direction of the flexible connection 32 bypasses the plurality of steering wheels. 34 and then changed to the left and right directions, so that the flexible connectors 32 on the two traction driving members 31 drive the mobile platform 2 to move back and forth left and right; when the traction platform 1 is a fixed quay, the mobile platform 2 is arranged between the fixed quays, and the traction mechanism also includes a traction driving member 31, and the traction driving member 31 is provided with a flexible connector 32 that can be retracted and released by the traction driving member 31; the two traction driving members 31 are respectively arranged on the fixed quay, and the two flexible connectors 32 are respectively connected to the left and right ends of the mobile platform 2, thereby driving the mobile platform 2 to move back and forth left and right. Among them, when the two traction driving members 31 are respectively located at the front and rear ends of the movable floating body, and are connected to the mobile platform 2 through the flexible connector 32, when the traction driving member 31 retracts and releases the flexible connector 32, the flexible connector 32 changes its direction from a direction perpendicular to the movable floating body to a direction parallel to the movable floating body through the guiding effect of the steering wheel 34, that is, Figure 1The traction device 3 can move the mobile platform 2 back and forth to the left and right directions. By setting up two traction drive members 31, the traction device 3 can operate simultaneously at the front and rear ends of the movable floating body, thereby enhancing the stability and control accuracy of the system. The design of multiple steering wheels 34 enables the flexible connector 32 to change direction smoothly, thereby improving the operating efficiency and flexibility of the system. This design enables the mobile platform 2 to move back and forth stably to the left and right, ensuring the coverage of the dredging operation. At the same time, through the combination of the traction drive member 31 and the guide member 33, the traction device 3 has a compact structure and is easy to operate, which improves the efficiency and stability of the dredging operation.

[0055] In some embodiments, the number and position of the steering wheels 34 can be adjusted according to specific needs to optimize the guiding effect of the flexible connector 32. The flexible connector 32 can be made of different materials to adapt to different working environments and strength requirements.

[0056] Further, when the traction platform 1 is a movable floating body, the movable floating body drives the mobile platform 2 to move back and forth; when the traction platform 1 is a fixed quay, the traction mechanism further includes a first guide rail 35, two first guide rails 35 are respectively arranged on the fixed quays on the left and right sides, two traction driving members 31 are respectively arranged on the two first guide rails 35, and the two traction driving members 31 drive the mobile platform 2 to move back and forth along the two first guide rails 35. The mobile platform 2 can move back and forth through the movable floating body, and can also move back and forth along the two first guide rails 35 on the fixed quay. The present invention has the advantages of wide application range, wide coverage, high dredging efficiency, etc.

[0057] Furthermore, the mobile platform 2 is a U-shaped pontoon, and a second winch 8 is provided on one side of the opening of the pontoon on the traction platform 1. The second cable 9 on the second winch 8 is connected to the lifting mechanism 5. When the second winch 8 is started, the second cable 9 pulls the lifting mechanism 5 to rotate along the direction of the pontoon opening, so that the lifting mechanism 5 can achieve a horizontal or vertical transformation. In the present invention, the buoyancy box is designed to be U-shaped, which provides stable buoyancy and an operating platform; the second winch 8 on the traction platform 1 is connected to the lifting mechanism 5 through the second cable 9, and the second winch 8 is started. The second cable 9 pulls the lifting mechanism 5 along the opening direction of the buoyancy box, which can realize the transformation of the lifting mechanism 5 in the horizontal direction and the vertical direction, and realizes the folding and lowering of the dredging device 4. When the dredging device 4 starts the dredging operation, the dredging device 4 is lowered by the second cable 9 on the second winch 8, and the horizontal direction is changed to the vertical direction, so that the dredging device 4 is located underwater for dredging operations. When the dredging device 4 completes the dredging operation, the dredging device 4 is folded by the second cable 9 on the second winch 8, and the vertical direction is changed to the horizontal direction.

[0058] Further, the lifting mechanism 5 includes a mounting bracket 51 and a cantilever mechanism 52. A plurality of pulleys are provided at the bottom of the mounting bracket 51. The second guide rails 21 are provided on both sides of the U-shaped pontoon respectively. The mounting bracket 51 is provided on the second guide rails 21. By adjusting the position of the mounting bracket 51 on the pontoon, the mobile platform 2 is in a horizontal state. A cantilever beam 56 is provided on the top of the mounting bracket 51. A hanging plate 57 is provided on the top of the cantilever mechanism 52. The hanging plate 57 is rotatably connected to the cantilever beam 56 through a rotating shaft. The cantilever mechanism 52 is in a vertical state at least in the working state. A first winch 53 is provided on the top of the cantilever mechanism 52. A first cable 54 that can be retracted is provided on the first winch 53. A hook 55 is provided at the lower end of the first cable 54. The hook 55 is connected to the dredging device 4. The first cable 54 drives the dredging device 4 to move up and down along the cantilever mechanism 52, and is used to adjust the height of the dredging device 4 to adapt to the change of tidal range. The lifting mechanism 5 is set on the top of the pontoon through the mounting bracket 51. The first winch 53 is installed on the top of the cantilever mechanism 52, and the lifting plate 57 is rotatably connected to the cantilever beam 56 through a rotating shaft. The first winch 53 retracts and releases the first cable 54, driving the hook 55 and the dredging device 4 connected thereto to move up and down along the cantilever mechanism 52. The cantilever mechanism 52 is in a vertical state at least in the working state to ensure that the dredging device 4 can accurately adjust its operating depth. Through the design of the lifting mechanism 5, the operating depth of the dredging device 4 can be adjusted to ensure that the dredging operation can be carried out smoothly under conditions of different water depths and tidal changes. The U-shaped pontoon design improves the overall stability, ensures that the pontoon floats stably in the water, and avoids the risk of capsizing; the second guide rails 21 are designed on both sides of the pontoon, so that the position of the mounting bracket 51 on the pontoon can be adjusted arbitrarily, so that the pontoon remains in a horizontal state.

[0059] In some embodiments, the design of the lifting mechanism 5 can use a hydraulic or pneumatic system to replace the traditional winch and wire rope to optimize its operating performance and stability. The material of the cantilever mechanism 52 can be selected from corrosion-resistant, high-strength alloy materials to improve its durability and adaptability. The length and material of the first cable 54 can be adjusted according to specific work requirements to adapt to different water depths and dredging operation environments.

[0060] In some embodiments, the lifting plate 57 is rotatably connected to the cantilever beam 56 via a rotating shaft, so that the cantilever mechanism 52 can rotate around the rotating shaft. For example, when the dredging operation begins, the second cable 9 on the second winch 8 pulls the cantilever mechanism 52 along the opening direction of the pontoon to drive the dredging device 4 from a horizontal direction to a vertical direction, or when the dredging operation is completed, the dredging device 4 will be driven from a vertical direction to a horizontal direction through the cantilever mechanism 52.

[0061] Further, the cantilever mechanism 52 includes an upper arm assembly 521 and a lower arm assembly 522. The top of the upper arm assembly 521 is connected to the hanging plate 57. The upper arm assembly 521 is composed of a plurality of upper arm frames 5211 connected in sequence, and the upper arm frame 5211 is a vertical through-structure; the lower arm assembly 522 is connected to the bottom end of the upper arm assembly 521. The lower arm assembly 522 is composed of a plurality of lower arm frames 5221 connected in sequence, and the lower arm frame 5221 is a vertical through-structure. The lower arm frame 5221 is provided with lifting rails 5222 around the inner periphery, and the dredging device 4 moves up and down along the lifting rails 5222. The cantilever mechanism 52 is composed of an upper arm assembly 521 and a lower arm assembly 522. The upper arm assembly 521 is connected in sequence through a plurality of upper arm frames 5211, and its top is connected to the hanging plate 57; the lower arm assembly 522 is connected in sequence through a plurality of lower arm frames 5221, and its bottom is connected to the upper arm assembly 521. Lifting rails 5222 are arranged around the interior of the lower arm frame 5221, and the dredging device 4 moves up and down along the lifting rails 5222 to achieve height adjustment. The structural design of the upper arm assembly 521 and the lower arm assembly 522 ensures the stability and strength of the cantilever mechanism 52, making the dredging device 4 more stable during the lifting process. The setting of the lifting rails 5222 enables the dredging device 4 to move accurately in the vertical direction without shaking during the movement, thereby improving the accuracy and efficiency of the dredging operation.

[0062] In some embodiments, the connection mode of the upper arm assembly 521 and the lower arm assembly 522 can be optimized, such as adopting a design of quick disassembly and installation to improve the convenience of maintenance and operation. The design of the lifting track 5222 can be adjusted according to specific dredging requirements, such as adding materials with low sliding resistance or lubrication devices to improve the smoothness of movement.

[0063] Furthermore, the dredging device includes a dredging head 41 and a lifting arm 42. The dredging head 41 is provided with a mud suction port 411 capable of sucking in sludge, and a mud outlet 412 capable of discharging sludge; a movable pulley 43 and a first steel wire rope 44 are provided at one end of the lifting arm 42, one end of the first steel wire rope 44 is connected to the hook 55, passes around the movable pulley 43, extends upward, and is fixedly connected to the cantilever mechanism 52, the other end of the lifting arm 42 is connected to the dredging head 41, the lifting arm 42 includes an intermediate lifting beam 421, a cross beam 422 and two transition beams 423, a plurality of rollers 424 are respectively provided around the intermediate lifting beam 421 in the vertical direction, and the rollers 424 move up and down along the lifting track 5222; the cross beam 422 is connected to the intermediate lifting beam 421; one end of the two transition beams 423 are respectively rotatably connected to the cross beam 422, and the other end of the two transition beams 423 is connected to the dredging head 41. The core component of the dredging device 4 is the dredging head 41, which sucks the bottom sludge through the sludge suction port 411 and discharges it through the sludge outlet 412. The lifting arm 42 connects the dredging head 41 and the hook 55, and the lifting arm 42 is moved up and down by the movable pulley 43 and the first wire rope 44. The middle lifting beam 421 moves up and down along the lifting track 5222 through the roller 424, the cross beam 422 is connected to the middle lifting beam 421, and the two transition beams 423 are rotatably connected to the cross beam 422. One end of the two transition beams 423 is rotatably connected to the cross beam 422 respectively, and the angle of the dredging head 41 can be adjusted to make the dredging effect better, and the sludge at the corners can be better cleaned, which greatly improves the dredging efficiency. The design of the dredging device 4 ensures that the dredging head 41 can efficiently suck in and discharge the sludge. The structural design of the lifting arm 42 enables the dredging head 41 to be stably and flexibly adjusted in height, and the cooperation between the roller 424 and the lifting track 5222 improves the smoothness and accuracy of the movement.

[0064] In some embodiments, the design of the dredging head 41 can be optimized according to the specific silt properties, such as adding different types of silt suction ports and silt discharge ports to improve dredging efficiency. The design of the movable pulley 43 and the first steel wire rope 44 can be optimized, such as using a higher strength steel wire rope or increasing the number of pulleys to improve the reliability and durability of the lifting system.

[0065] Furthermore, the combined flexible dredging system also includes a bottoming device 6, which is connected to the hook 55 on the first winch 53 and is controlled by the first winch 53 to rise and fall synchronously with the dredging device 4; the bottoming device 6 is deeper in the water than the dredging device 4, and first contacts the surface of the dredging area after entering the water; the bottoming device 6 includes two bottoming mechanisms 61, a movable pulley set 62, a second steel wire rope 63 and a third steel wire rope 64, and the two bottoming mechanisms 61 are respectively arranged on both sides of the dredging device 4 and are parallel to each other; the movable pulley set 62 is arranged above the two bottoming mechanisms 61; one end of the second steel wire rope 63 is connected to one bottoming mechanism 61 and then bypasses the movable pulley set 62 to extend downward and connect to the other bottoming mechanism 61 so that the two bottoming mechanisms 61 form a whole; one end of the third steel wire rope 64 is connected to the hook 55, bypasses the movable pulley set 62, extends upward and connects to the weighing sensor 7. The bottoming device 6 is composed of two bottoming mechanisms 61 parallel to each other, which are respectively arranged on both sides of the dredging device 4. The movable pulley group 62 is arranged above the bottoming mechanism 61 at intervals. One end of the second steel wire rope 63 is connected to one bottoming mechanism 61 and then passes through the movable pulley group 62 to extend downward and connect to the other bottoming mechanism 61, so that the two bottoming mechanisms 61 form a whole. One end of the third steel wire rope 64 is connected to the hook 55 and passes through the movable pulley group 62 to extend upward. The bottoming device 6 in the present invention includes two bottoming mechanisms 61, which are respectively installed on both sides of the dredging device 4. The movable pulley group 62 is arranged above the middle of the two bottoming mechanisms 61, and the two bottoming mechanisms 61 are connected into a whole by the second steel wire rope 63, so that the two bottoming mechanisms 61 can be lifted and lowered synchronously. This design ensures that the bottoming device 6 can generate a stable bottoming signal when it contacts the bottom of the water and transmit it to the control module.

[0066] Furthermore, the combined flexible dredging system also includes a control module and a weighing sensor 7, the weighing sensor 7 is fixed on the lifting mechanism 5, the weighing sensor 7 is connected to the bottoming device 6 through the second steel wire rope 63, the weight signal of the bottoming device 6 is detected by the weighing sensor 7, and the control module is electrically connected to the weighing sensor 7 and the lifting mechanism 5; wherein the weighing sensor 7 is configured as follows: when the weighing sensor 7 detects that the bottoming device 6 has no force on the weighing sensor 7, the weighing sensor 7 sends a first weight signal to the control module; when the weighing sensor 7 detects that the gravity of the bottoming device 6 completely acts on the weighing sensor 7, the weighing sensor 7 sends a first weight signal to the control module; When the load cell 7 is detected, the load cell 7 sends a second weight signal to the control module; when the load cell 7 detects that the gravity of the bottoming device 6 acts on the load cell 7, the load cell 7 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 load cell 7 received in real time, control the lifting mechanism 5 to drive the dredging device 4 and the bottoming device 6 to rise and fall synchronously, so that the weight signal of the load cell 7 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 4 is completed. The present invention accurately detects the force change of the bottoming device 6 on the load cell 7 through the load cell 7, and converts the force into a weight signal and sends it to the control module. The control module controls the lifting mechanism 5 to lift and lower the dredging device 4 and the bottoming device 6 in real time through the weight signal sent, thereby ensuring that the dredging device 4 can accurately reach the working position in real time, and improving the accuracy and efficiency of the dredging operation.

[0067] The construction method of the combined flexible dredging system comprises the following steps:

[0068] S101, install the traction device 3 and the second hoist 8 on the traction platform 1, install the lifting mechanism 5 on the mobile platform 2, install the first hoist 53 on the lifting mechanism 5, connect the dredging device 4 and the bottoming device 6 to the first hoist 53 respectively, connect the weighing sensor 7 to the bottoming device 6, flexibly connect the traction platform 1 and the mobile platform 2 through the traction device 3, and after the assembly is completed, debug the entire dredging system; and locate the combined flexible dredging system through GPS, and move the combined flexible dredging system to the water area to be dredged;

[0069] S102, after successful debugging, start the second winch 8, so that the second cable 9 pulls the lifting mechanism 5 to rotate along the opening direction of the pontoon, so that the lifting mechanism 5 changes from the horizontal direction to the vertical direction, and slides the mounting bracket 51 along the second guide rail 21 to adjust the position of the mounting bracket 51 on the pontoon, so that the mobile platform 2 is in a horizontal state, thereby making the cantilever mechanism 52 in a vertical state;

[0070] S103, lowering the dredging device 4 to the dredging operation depth through the lifting mechanism 5;

[0071] S104, when the dredging device 4 is at the operating depth, the dredging head 41 is started to suck in the sludge and discharge it; according to the change of the tidal range, the operating depth of the dredging device 4 is adjusted by the lifting mechanism 5 to ensure the continuity and stability of the dredging operation;

[0072] S105, the mobile platform 2 is driven by the traction device 3 to move back and forth left and right, thereby driving the dredging device 4 to complete a part of the dredging operation. After the dredging device 4 completes this part of the dredging range, when the traction platform 1 is a movable floating body, the movable floating body is started, and the mobile platform 2 is driven by the movable floating body to move back and forth to the next dredging range, and the mobile platform 2 is driven by the traction device 3 to move back and forth left and right again, thereby driving the dredging device 4 to move back and forth left and right to complete the dredging operation within this dredging range, and this is repeated until all the dredging ranges to be completed; when the traction platform 1 is a fixed shore wall, the two traction drive members 31 drive the mobile platform 2 to move back and forth along the two first guide rails 35 to the next dredging range, and the mobile platform 2 is driven by the traction device 3 to move back and forth left and right again, thereby driving the dredging device 4 to move back and forth left and right to complete the dredging operation within this dredging range, and this is repeated until all the dredging ranges to be completed;

[0073] S106. After the dredging operation is completed, the dredging head 41 is stopped, and the dredging device 4 is lifted up to a safe height by the first winch 53 to inspect the dredging effect. After the inspection is successful, the cantilever mechanism 52 is pulled around the cantilever beam 56 by the second cable 9 on the second winch 8 to rotate and drive the dredging device 4 from a vertical direction to a horizontal direction, and the dredging system is disassembled, and the traction platform 1, mobile platform 2, traction device 3 and other components of the entire dredging system are used for other purposes.

[0074] In some embodiments, a positioning anchor may also be provided on the traction platform 1. When a large-scale dredging operation is required and the traction drive 31 and the flexible connector 32 cannot drive the movement of the mobile platform 2, the dredging device 4 can be pulled by the positioning anchor on the traction platform 1 to enable dredging operations to be carried out over a larger range.

[0075] In some embodiments, when the dredging device 4 is performing dredging operations, the dredging head 41 is started to suck in the sludge through the sludge suction port 411 and then discharge it. This process requires another set of equipment to discharge from the sludge outlet 412, which is not drawn in the figure.

[0076] 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.

[0077] 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. Combined flexible dredging system, characterized in that: include: Traction platform; A mobile platform floating on the water surface, wherein the size of the mobile platform is smaller than the size of the traction platform; A lifting mechanism, mounted on the mobile platform; A dredging device is connected to the lifting mechanism and is controlled by the lifting mechanism to move up and down to perform dredging operations; A traction device, wherein the traction device comprises two traction mechanisms, wherein the traction mechanisms comprise flexible connectors, wherein the two traction mechanisms are respectively arranged on the traction platform and located on the left and right sides of the mobile platform, wherein the two flexible connectors are respectively connected to the left and right ends of the mobile platform, and wherein the flexible connectors are retractable in the left and right directions; Wherein, when one of the two flexible connectors is extended, the other flexible connector is contracted synchronously to drive the mobile platform to move back and forth between the two traction mechanisms; the traction platform moves autonomously to drive the mobile platform to move back and forth, or the traction device moves in the front-rear direction relative to the traction platform to drive the mobile platform to move back and forth; The mobile platform is a U-shaped pontoon, and a second winch is provided on the traction platform at one side of the opening of the pontoon. The second cable on the second winch is connected to the lifting mechanism. When the second winch is started, the second cable pulls the lifting mechanism to rotate along the opening direction of the pontoon, so that the lifting mechanism can achieve a horizontal or vertical transformation. The lifting mechanism comprises: A mounting bracket, wherein a plurality of pulleys are provided at the bottom of the mounting bracket, and second guide rails are provided on both sides of the U-shape of the pontoon respectively, and the mounting bracket is arranged on the second guide rails. By adjusting the position of the mounting bracket on the pontoon, the mobile platform is in a horizontal state, and a cantilever beam is provided on the top of the mounting bracket; A cantilever mechanism, a hoisting plate is provided on the top of the cantilever mechanism, the hoisting plate is rotatably connected to the cantilever beam, 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 combined flexible dredging system further comprises a bottoming device, which is connected to the hook on the first hoist and is controlled by the first hoist to rise and fall synchronously with the dredging device; the bottoming device enters the water deeper than the dredging device, and first contacts the surface of the dredging area after entering the water; wherein the bottoming device comprises: Two bottom contact mechanisms are respectively arranged on two sides of the dredging device and are parallel to each other; A movable pulley block is arranged above the two bottoming mechanisms at intervals; A second steel wire rope, one end of which is connected to one of the bottoming mechanisms and then 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 and extends upwards around the movable pulley block; The combined flexible dredging system also includes: Control module; A weighing sensor is fixed on the lifting mechanism, the weighing sensor is connected to the bottoming device through the third steel wire rope, the weight signal of the bottoming device is detected by the weighing sensor, and the control module is electrically connected to the weighing sensor and the lifting mechanism; Wherein, 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 lifting mechanism drives 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.

2. The combined flexible dredging system according to claim 1, characterized in that: The traction platform is a movable floating body or a fixed quay wall. When the traction platform is a movable floating body, the movable platform is arranged parallel to one side of the movable floating body, and the traction mechanism further includes: A traction drive member, on which the flexible connection member capable of being retracted and released by the traction drive member is provided; A guide member, the traction drive member is arranged on the guide member, a plurality of steering wheels are arranged on the guide member, the flexible connection member bypasses the plurality of steering wheels and is connected to the mobile platform, wherein the direction of the flexible connection member is changed to the left and right direction after bypassing the plurality of steering wheels, so that the flexible connection members on the two traction drive members drive the mobile platform to move back and forth left and right; When the traction platform is a fixed shore wall, the mobile platform is arranged between the fixed shore walls, and the traction mechanism also includes a traction driving member, on which the flexible connecting member that can be retracted and released by the traction driving member is provided; two traction driving members are respectively arranged on the fixed shore walls, and the two flexible connecting members are respectively connected to the left and right ends of the mobile platform, thereby driving the mobile platform to move back and forth left and right.

3. The combined flexible dredging system according to claim 2, characterized in that: When the traction platform is a movable floating body, the movable floating body drives the mobile platform to move back and forth; when the traction platform is the fixed shore, the traction mechanism also includes a first guide rail, two of the first guide rails are respectively arranged on the fixed shore on the left and right sides, and two of the traction driving components are respectively arranged on the two first guide rails, and the two traction driving components drive the mobile platform to move back and forth along the two first guide rails.

4. The combined flexible dredging system according to claim 1, characterized in that: The cantilever mechanism comprises: An upper arm assembly, the top of which is connected to the hoisting plate, the upper arm assembly is composed of a plurality of upper arm frames connected in sequence, and the upper arm frames are in 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. 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.

5. The combined flexible dredging system according to claim 4, characterized in that: 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 sludge; 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 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.

6. The construction method of the combined flexible dredging system is characterized in that: The combined flexible dredging system according to any one of claims 1 to 5 is used for construction, and the construction method comprises the following steps: S101, installing the traction device and the second winch on the traction platform, installing the lifting mechanism on the mobile platform, installing the first winch on the lifting mechanism, connecting the dredging device and the bottoming device to the first winch respectively, connecting the weighing sensor to the bottoming device, flexibly connecting the traction platform and the mobile platform through the traction device, and after the assembly is completed, debugging the entire dredging system; S102, after successful debugging, start the second winch, so that the second cable pulls the lifting mechanism to rotate along the opening direction of the pontoon, so that the lifting mechanism changes from a horizontal direction to a vertical direction, and slides the mounting bracket along the second guide rail to adjust the position of the mounting bracket on the pontoon, so that the mobile platform is in a horizontal state, thereby making the cantilever mechanism in a vertical state; S103, lowering the dredging device to the dredging operation depth through the lifting mechanism; S104, when the dredging device is at the operating depth, the dredging device is started to suck in and discharge the sludge; according to the change of tidal range, the operating depth of the dredging device is adjusted in real time through the lifting mechanism to ensure the continuity and stability of the dredging operation; S105, the mobile platform is driven to move back and forth left and right by the traction device, thereby driving the dredging device to complete a part of the dredging operation. After the dredging device completes this part of the dredging range, when the traction platform is a movable floating body, the movable floating body is started, and the mobile platform is driven to move back and forth to the next dredging range by the movable floating body, and the mobile platform is driven to move back and forth left and right by the flexible connecting member again, thereby driving the dredging device to move back and forth left and right to complete the dredging operation within this dredging range, and this is repeated until all the dredging ranges to be completed; when the traction platform is a fixed shore wall, the two traction drive members drive the mobile platform to move back and forth along the two first guide rails to the next dredging range, and the mobile platform is driven to move back and forth left and right by the flexible connecting member again, thereby driving the dredging device to move back and forth left and right to complete the dredging operation within this dredging range, and this is repeated until all the dredging ranges to be completed; S106. After the dredging operation is completed, the dredging device is lifted up to a safe height by the first winch to inspect the dredging effect. After the inspection is successful, the cantilever mechanism drives the dredging device from a vertical direction to a horizontal direction by the second winch, and the dredging system is disassembled.

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