Distributed dredge pump dredging system suitable for trailing suction dredger under multiple working conditions
By distributing mud pumps and piping systems on the trailing suction hopper dredger, the adaptability of the dredger under multiple working conditions is solved, enabling efficient switching between various operating modes and energy saving, thus meeting the needs of projects such as deep-sea sand extraction, deep-water port dredging, and coastal restoration.
Patent Information
- Authority / Receiving Office
- CN · China
- Patent Type
- Applications(China)
- Current Assignee / Owner
- CCCC SHANGHAI DREDGING CO LTD
- Filing Date
- 2026-03-20
- Publication Date
- 2026-05-12
AI Technical Summary
The existing trailing suction hopper dredgers have limited power system configurations, resulting in a single dredging operation mode and insufficient adaptability to complex working conditions. This makes it difficult to meet diverse construction needs, especially in terms of adaptability to different dredging depths, hydraulic filling, and backfilling conditions.
The first and second in-cabin mud pumps are respectively located at the bow and stern of the trailing suction hopper dredger. By flexibly switching the suction and discharge pipe systems, various dredging operation modes can be switched, including dual underwater pump and dual-drag dredging, single-drag dredging, bow blowing/bow spraying, and backfilling. The pipeline layout is optimized by combining variable frequency motor drive and single-speed gearbox.
It enables stepped dredging operations from shallow water to ultra-deep water, improving engineering adaptability, reducing the number of pipeline bends, reducing energy loss, improving transportation efficiency and energy saving, and adapting to diverse engineering needs.
Smart Images
Figure CN122013837A_ABST
Abstract
Description
Technical Field
[0001] This invention relates to the field of trailing suction hopper dredger technology, specifically to a distributed mud pump dredging system for trailing suction hopper dredgers suitable for multiple working conditions. Background Technology
[0002] With the rapid advancement of global marine engineering construction, major projects such as deep-sea development, international waterway upgrades, and coastal port expansion have continuously increased the performance requirements for high-end dredging equipment. Ultra-large, intelligent, and green trailing suction hopper dredgers have become the core construction equipment in such projects.
[0003] Currently, the power system configuration of trailing suction hopper dredgers generally adopts a "one-to-two" composite drive mode. In this mode, the main diesel engine serves as both the prime mover for the main propulsion system and the prime mover for the shaft-driven generator. It drives the variable-pitch propeller to propel the ship and simultaneously powers the shaft-driven generator to supply power to the ship's electrical system, thereby driving various operating equipment such as mud pumps, high-pressure flushing pumps, and hydraulic systems. Regarding the arrangement of the mud pumps inside the hull, the traditional solution usually places the two pumps together at the bow. While this arrangement facilitates the overall planning of the engine room and pump room and can accommodate the installation of long drag arms to achieve greater dredging depths, it suffers from problems such as a single dredging operation mode and insufficient adaptability to complex working conditions, making it difficult to meet the diverse construction needs of different dredging depths, reclamation, and backfilling. Summary of the Invention
[0004] To address the shortcomings of existing technologies, this invention provides a distributed mud pump dredging system for trailing suction hopper dredgers suitable for multiple working conditions, thus solving the problems mentioned in the background.
[0005] This invention provides the following technical solution: a distributed mud pump dredging system for trailing suction hopper dredgers suitable for multiple working conditions, installed on a trailing suction hopper dredger, comprising: The first in-cabin mud pump is located in the bow area of the trailing suction hopper dredger; The second in-cabin mud pump is located in the stern area of the trailing suction hopper dredger; In addition, the suction and discharge sludge piping system is configured to be able to connect to the left rake head, right rake head, left submersible pump, right submersible pump, first hopper sludge pump, second hopper sludge pump and sludge hopper respectively through switching pipelines, and to achieve switching of multiple dredging operation modes through the switching of the piping system.
[0006] Preferably, both the first and second in-chamber mud pumps are driven by variable frequency motors, and the variable frequency motors are connected to the corresponding mud pumps through a single-speed gearbox.
[0007] Preferably, the suction and discharge sludge piping system includes pipeline components and control valves for connecting the underwater pump, the first sludge pump in the first compartment, the second sludge pump in the second compartment, the sludge compartment, and the bow filling device, and the path switching for different dredging operations is achieved by controlling the opening and closing of the valves.
[0008] Preferably, in medium-deep water conditions with a dredging depth of less than 45m and 45m to 70m, a dual submersible pump and dual rake dredging mode is adopted: The silt sucked in by the right rake head is transported to pipeline B of the pipeline assembly by the right submersible pump, and then introduced into the silt tank for storage. The path is: right rake head → right submersible pump → pipeline B → silt tank. The silt sucked in by the left rake head is transported to pipeline A of the pipeline assembly by the left submersible pump, and then introduced into the silt tank for storage. The path is: left rake head → left submersible pump → pipeline A → silt tank. Furthermore, when digging at a depth of 45m to 70m, the right and left rake heads should be adapted to the deep-water operation requirements by extending the rake arms.
[0009] Preferably, in ultra-deep water conditions with a dredging depth of 70m to 120m, a single-rake dredging mode is adopted, with the right submersible pump and the mud pump in the first compartment connected in series. When digging depths of 70m to 120m, the rake arm connected to the right rake head is further lengthened to meet the requirements of ultra-deep water operations. The sediment collected by the right rake head is sequentially introduced into the mud chamber via the right submersible pump, the mud pump in the first chamber, pipeline C of the pipeline assembly, and pipeline A. The path is: right rake head → right submersible pump → mud pump in the first chamber → C → A → mud chamber.
[0010] Preferably, in special dredging conditions such as underwater pump isolation or maintenance, the mud pump in the first compartment operates alone: After the underwater pump on the isolation rake arm of the dredging pipeline is replaced, the silt collected by the left rake head is introduced into the mud chamber through the mud pump in the first chamber, pipeline C of the pipeline assembly, and pipeline A. The path is: right rake head → right underwater pump → mud pump in the first chamber → pipeline C → pipeline A → mud chamber.
[0011] Preferably, under bow blowdown or bow jetting conditions, it has at least two operating modes: Mode 1 involves the mud pump in the first compartment operating independently, with the mud and sand in the mud compartment being transported sequentially to the bow ramming device via the mud pump in the first compartment and pipeline C of the pipeline assembly. Mode 2 involves the first and second mud pumps operating in series. The mud and sand in the mud chamber are sequentially transported to the bow ramming device via the second mud pump, pipeline E, pipeline D, the first mud pump, and pipeline C.
[0012] Preferably, the bow buoyancy or bow spraying operation also includes a second in-cabin mud pump independent operation mode, in which the mud cabin is connected to the bow buoyancy device in sequence through the second in-cabin mud pump, pipeline E, pipeline A and pipeline C of the pipeline assembly.
[0013] Preferably, during backfilling, the second in-chamber mud pump operates independently. The mud hopper is connected to the left rake pipe sequentially via the mud pump in the second hopper, pipeline E, and pipeline D; or The mud chamber is connected to the right rake pipe in sequence through the mud pump in the second chamber, pipeline E, and pipeline D.
[0014] Preferably, the direction of the mud pump in the first compartment and the mud pump in the second compartment, viewed from the mud pump inlet side, is clockwise.
[0015] Compared with the prior art, the present invention has the following beneficial effects: 1. This invention, by arranging the first and second in-cabin mud pumps at the bow and stern respectively, and combining them with the flexible switching of the suction and discharge mud pipe system, enables the trailing suction hopper dredger to efficiently cover a wider range of operating scenarios. This invention can achieve: stepped dredging operations from shallow water, medium-deep water to ultra-deep water, full water depth coverage, and integrates conventional dredging, ultra-deep water tandem dredging, underwater pump maintenance mode, bow blowing / bow spraying, and backfilling, etc. It can meet diverse engineering needs such as deep-sea sand extraction, deep-water port and channel dredging, and coastal restoration, and improve the engineering adaptability of the trailing suction hopper dredger.
[0016] 2. This invention optimizes the routing of the dredging pipeline within the hull by distributing the first and second in-hull mud pumps at the bow and stern, and by coordinating them with the suction and discharge pipe system. Compared to the traditional approach of concentrating two mud pumps at the bow or stern, this invention significantly reduces the number of pipe bends, increases the proportion of straight pipe sections, reduces frictional resistance, and allows for smoother mud flow within the pipeline. It also reduces local energy loss caused by bends, improves transport efficiency, and under the same power input, the effective power of the mud pump is used more for transporting mud and sand rather than overcoming resistance, thereby improving the transport efficiency of the mud pump and achieving energy saving and efficiency improvement. Attached Figure Description
[0017] Figure 1 This is a schematic diagram showing the distribution and structure of the first and second in-chamber mud pumps of the present invention. Figure 2 This is a schematic diagram of the sludge suction and discharge pipe system of the present invention; Figure 3 This is a schematic diagram of the pipeline assembly structure of the sludge suction and discharge pipe system of the present invention.
[0018] In the diagram: 1. Mud pump in the first compartment; 2. Mud pump in the second compartment; 3. Mud suction and discharge piping system; 4. Left rake head; 5. Right rake head; 6. Left submersible pump; 7. Right submersible pump. Detailed Implementation
[0019] The technical solutions of the embodiments of the present invention will be clearly and completely described below with reference to the accompanying drawings. Obviously, the described embodiments are only some embodiments of the present invention, and not all embodiments. Based on the embodiments of the present invention, all other embodiments obtained by those skilled in the art without creative effort are within the scope of protection of the present invention.
[0020] Please see Figure 1-3 A distributed mud pump dredging system for trailing suction hopper dredgers suitable for multiple working conditions is provided on the dredger and includes: a first in-cabin mud pump 1, a second in-cabin mud pump 2, and a suction and discharge pipe system 3. The first in-cabin mud pump 1 is located in the bow area of the trailing suction hopper dredger, and the second in-cabin mud pump 2 is located in the stern area of the trailing suction hopper dredger. The suction and discharge pipe system 3 is configured to be able to connect to the left rake head 4, the right rake head 5, the left submersible pump 6, the right submersible pump 7, the first in-cabin mud pump 1, the second in-cabin mud pump 2, and the mud hopper through switching pipes, and to achieve switching of multiple dredging operation modes through the switching of the pipe system.
[0021] Both the first mud pump 1 and the second mud pump 2 in the first compartment are driven by variable frequency motors, which are connected to the corresponding mud pumps through a single-speed gearbox.
[0022] The suction and discharge sludge piping system 3 includes pipeline components and control valves for connecting the underwater pump, the first chamber sludge pump 1, the second chamber sludge pump 2, the sludge chamber, and the bow filling device. The path switching for different dredging operations is achieved by controlling the opening and closing of the valves.
[0023] In medium-deep water conditions with a dredging depth of less than 45m and between 45m and 70m, a dual submersible pump and dual rake dredging mode is adopted: The mud and sand sucked in by the right rake head 5 are transported to pipeline B of the pipeline assembly via the right submersible pump 7, and then introduced into the mud tank for storage. The path is: right rake head 5 → right submersible pump 7 → pipeline B → mud tank. The mud and sand sucked in by the left rake head 4 are transported to pipeline A of the pipeline assembly by the left submersible pump 6, and then introduced into the mud tank for storage. The path is: left rake head 4 → left submersible pump 6 → pipeline A → mud tank. Furthermore, when digging at a depth of 45m to 70m, the right rake head 5 and the left rake head 4 should be adapted to the deep-water operation requirements by extending the rake arms.
[0024] In ultra-deep water conditions with dredging depths of 70m to 120m, a single-rake dredging mode is adopted, with the right submersible pump 7 connected in series with the mud pump 1 in the first compartment: When digging depths of 70m to 120m, the rake arm connected to the right rake head 5 is further lengthened to meet the requirements of ultra-deep water operations. The sediment collected by the right rake head 5 is sequentially introduced into the mud chamber via the right submersible pump 7, the mud pump 1 in the first chamber, pipeline C of the pipeline assembly, and pipeline A. The path is: right rake head 5 → right submersible pump 7 → mud pump 1 in the first chamber → C → A → mud chamber.
[0025] In special dredging conditions requiring underwater pump isolation or maintenance, the first mud pump 1 in the first compartment shall operate independently. After the underwater pump on the isolation rake arm of the dredging pipeline is replaced, the silt collected by the left rake head 4 is introduced into the mud chamber through the mud pump 1 in the first chamber, pipeline C of the pipeline assembly, and pipeline A. The path is: right rake head 5 → right underwater pump 7 → mud pump 1 in the first chamber → pipeline C → pipeline A → mud chamber.
[0026] It has at least two operating modes under bow blowdown or bow jetting conditions: Mode 1 involves the independent operation of the mud pump 1 in the first compartment. The mud and sand in the mud compartment are transported to the bow ramming device in sequence through the mud pump 1 in the first compartment and pipeline C of the pipeline assembly. Mode 2 involves the first mud pump 1 and the second mud pump 2 operating in series. The mud and sand in the mud chamber are transported sequentially to the bow filling device via the second mud pump 2, pipeline E, pipeline D, the first mud pump 1, and pipeline C.
[0027] The bow buoyancy or bow spraying operation also includes a separate operation mode for the mud pump 2 in the second compartment. The mud compartment is connected to the bow buoyancy device in sequence through the mud pump 2 in the second compartment, pipeline E, pipeline A and pipeline C of the pipeline assembly.
[0028] During backfilling operations, the second mud pump 2 operates independently: The mud hopper is connected to the left rake pipe sequentially via mud pump 2 in the second hopper, pipeline E, and pipeline D; or The mud chamber is connected to the right rake pipe in sequence through mud pump 2 in the second chamber, pipeline E, and pipeline D.
[0029] Looking from the mud pump inlet side, the direction of rotation of mud pump 1 in the first compartment and mud pump 2 in the second compartment is clockwise.
[0030] This embodiment provides a distributed mud pump dredging system for trailing suction hopper dredgers suitable for multiple working conditions. The trailing suction hopper dredger adopts a "one-to-two" composite drive mode, that is, the main diesel engine serves as the common prime mover for the main propulsion system and the shaft-driven generator, and the shaft-driven generator supplies power to the entire ship's electrical system.
[0031] In one specific embodiment, such as Figure 1 As shown, the dredging system mainly includes: two in-cabin mud pumps, namely the first in-cabin mud pump 1 and the second in-cabin mud pump 2; and a mud suction and discharge pipe system 3.
[0032] The first in-tank mud pump 1 is located in the pump room in the bow area, and the second in-tank mud pump 2 is located in the pump room in the stern area. The two are arranged in a distributed manner, breaking the traditional pattern of two in-tank pumps concentrated in the bow. Both the first in-tank mud pump 1 and the second in-tank mud pump 2 are driven by variable frequency motors through a single-speed gearbox. Preferably, the direction of rotation of the first in-tank mud pump 1 and the second in-tank mud pump 2 when viewed from the mud pump inlet side is clockwise. Single pump operation or dual pump series operation can be selected according to the needs of operation.
[0033] The suction and discharge sludge piping system 3 includes multiple pipelines and multiple control valves, specifically including: pipeline A, pipeline B, pipeline C, pipeline D, pipeline E, and valves installed at each connection point. The valves are not labeled in the diagram. The suction and discharge sludge piping system 3 is connected to the left submersible pump 6, the right submersible pump 7, the first chamber sludge pump 1, the second chamber sludge pump 2, the sludge chamber, and the bow shoveling device. By controlling the opening and closing of different valves, the path switching of different dredging operation modes can be realized. The soil type dredged by the trailing suction hopper dredger This vessel can dredge silt, clay, muddy sand, dense silt, medium and fine sand, coarse sand, gravel, and pebbles. The soil technical requirements are as follows: Clay: Ip>17 Muddy sand: d 50% = 0.075 mm, density (bulk weight) = 1.68 t / m³ 3 Dense silt: d 50% = 0.23 mm, density (bulk weight) = 1.95 t / m³ 3 Medium and fine sand: d 10% = 0.31 mm, d 50% = 0.23 mm, d 90% = 0.16mm, excluding silt, density (bulk weight) = 1.95 t / m³ 3 (Water is filled into the fine pores of the sand) Coarse sand: d 50% = 0.50 mm, density (bulk weight) = 2.00 t / m³ 3 gravel, pebbles: d 50% = 20 mm; Clean water design conditions for the in-chamber pump: Underwater mud pump design conditions: The loading conditions of in-cabin pumps and submersible pumps: Shore-blowing operation of in-cabin pumps and underwater pumps: 1. When the dredging depth is within 45m, this embodiment adopts the dual underwater pump and dual rake dredging mode.
[0034] In practice, the corresponding control valves are opened to create the following two independent conveying paths: Right rake path: The mud and sand sucked in by the right rake head 5 are pressurized by the right submersible pump 7 and then directly transported to the mud hopper for storage through pipeline B.
[0035] Left rake path: The mud and sand sucked in by the left rake head 4 are pressurized by the left submersible pump 6 and then directly transported to the mud hopper for storage through pipeline A.
[0036] Under this operating condition, neither the first mud pump 1 nor the second mud pump 2 in the first compartment participates in the dredging operation. The dredging and loading of mud into the compartment in shallow and medium-deep water areas can be completed efficiently by relying solely on the two underwater pumps.
[0037] 2. Dredging depth 45m~70m: By extending the rake arm to adapt to the needs of deep-water operations, the double underwater pump and double rake dredging mode is maintained. The mud and sand transport path is the same as that in the 45m and below working conditions, that is, right rake head 5 → right underwater pump 7 → pipeline B → mud hopper, left rake head 4 → left underwater pump 6 → pipeline A → mud hopper, to achieve stable dredging in medium and deep water areas; path: right rake head 5 → right underwater pump 7 → pipeline B → mud hopper, left rake head 4 → left underwater pump 6 → pipeline A → mud hopper.
[0038] 3. Dredging depth 70m~120m Working condition: When the dredging depth reaches the ultra-deep water area of 70m~120m, the head of the underwater pump alone is insufficient. In this embodiment, the single rake dredging mode of the right underwater pump 7 and the mud pump 1 in the first compartment are connected in series is adopted.
[0039] In practice, the right rake arm is lengthened to adapt to ultra-deep water operations, and the corresponding control valves are opened to form the following conveying path: The sediment collected by the right rake head 5 is first pressurized by the right submersible pump 7, and then transported to the inlet of the mud pump 1 in the first compartment. The mud pump 1 in the first compartment is started to pressurize the sediment a second time. The pressurized sediment is then introduced into the mud compartment for storage through pipeline C and pipeline A.
[0040] This model effectively overcomes the transport resistance in ultra-deepwater operations by connecting underwater pumps and in-cabin pumps in series, thus solving the problem of ultra-deepwater dredging.
[0041] 4. Special dredging conditions: When it is necessary to repair the underwater pump on the right rake arm, or when special geological conditions are encountered and the operation mode needs to be changed, this embodiment can adopt the independent operation mode of the mud pump 1 in the first compartment.
[0042] In practice, the right submersible pump 7 is isolated from the system by replacing or isolating the relevant dredging pipelines. The corresponding control valves are then opened to create the following delivery path: The mud and sand collected by the left rake head 4 are directly pressurized by the mud pump 1 in the first chamber and then introduced into the mud chamber through pipeline C and pipeline A.
[0043] This mode ensures that the vessel can continue dredging operations even when the underwater pumps are inoperable, improving equipment availability and adaptability to different operating conditions.
[0044] 5. Bow blowdown or bow jetting operation: When bow blowdown or bow jetting is required, such as for land reclamation operations, this embodiment provides a variety of operating modes to adapt to different head and flow rate requirements.
[0045] Mode 1: Mud pump 1 in the first compartment operates independently: Open the corresponding valve, and the mud and sand in the mud compartment are extracted and pressurized by the mud pump 1 in the first compartment, and then transported to the bow sluice gate through pipeline C for bow sluice gate or bow spraying operation.
[0046] Mode 2: Dual-pump series operation: When a higher head or larger flow rate is required, the corresponding valve is opened. The mud and sand in the mud chamber are first extracted and pressurized by the mud pump 2 in the second chamber, and then enter the inlet of the mud pump 1 in the first chamber through pipeline E and pipeline D. The mud pump 1 in the first chamber is pressurized a second time, and finally transported to the bow filling device through pipeline C.
[0047] Mode 3: Independent operation of mud pump 2 in the second compartment: By replacing some pipelines, mud pump 2 in the second compartment can also operate independently. After opening the corresponding valves, the mud and sand in the mud compartment are extracted and pressurized by mud pump 2 in the second compartment, and then transported to the bow ramming device in sequence through pipeline E, pipeline A, and pipeline C; 6. Backfilling conditions: like Figure 3 As shown, when backfilling operations such as channel maintenance and coastal restoration are required, this embodiment adopts the independent operation mode of the second in-tank mud pump 2.
[0048] In practice, the corresponding valves are opened, and the mud and sand in the mud chamber are extracted and pressurized by the mud pump 2 in the second chamber, and then transported to the left rake pipe or the right rake pipe through pipeline E and pipeline D, so as to accurately backfill the mud and sand into the designated water area.
[0049] If backfilling is required via the right rake pipe, it may be necessary to replace some connecting pipes according to the actual pipeline layout.
[0050] A single vessel can cover dredging needs in shallow, medium, and deep waters, and integrates multiple functions such as hydraulic filling and backfilling. According to actual vessel testing and comparison, compared with the traditional dual-pump centralized bow arrangement, this system reduces pipeline bends and optimizes the delivery path, resulting in a reduction of slurry delivery pipe resistance of about 15%. At the same power, the dredging efficiency is increased by more than 30%. The distributed bow and stern arrangement makes the bow-stern draft difference smaller under no-load, full-load, and operating conditions, and reduces extreme trim angles by more than 40%, significantly improving operational safety.
[0051] Although embodiments of the invention have been shown and described, it will be understood by those skilled in the art that various changes, modifications, substitutions and alterations can be made to these embodiments without departing from the principles and spirit of the invention, the scope of which is defined by the appended claims and their equivalents.
Claims
1. A distributed mud pump dredging system for trailing suction hopper dredgers suitable for multiple working conditions, installed on a trailing suction hopper dredger, characterized in that, include: The first in-cabin mud pump (1) is located in the bow area of the trailing suction hopper dredger; The second in-cabin mud pump (2) is located in the stern area of the trailing suction hopper dredger; In addition, the suction and discharge sludge pipe system (3) is configured to be able to connect to the left rake head (4), the right rake head (5), the left underwater pump (6), the right underwater pump (7), the first sludge pump (1), the second sludge pump (2), and the sludge chamber through switching pipes, and to achieve switching of multiple dredging operation modes through pipe system switching.
2. The distributed mud pump dredging system for trailing suction hopper dredgers suitable for multiple working conditions as described in claim 1, characterized in that, Both the first in-chamber mud pump (1) and the second in-chamber mud pump (2) are driven by variable frequency motors, and the variable frequency motors are connected to the corresponding mud pumps through a single-speed gearbox.
3. A distributed mud pump dredging system for trailing suction hopper dredgers suitable for multiple working conditions, as described in claim 2, is characterized in that... The suction and discharge sludge piping system (3) includes pipeline components and control valves for connecting the underwater pump, the first sludge pump (1), the second sludge pump (2), the sludge chamber, and the bow filling device. The path switching for different dredging operations is achieved by controlling the opening and closing of the valves.
4. A distributed mud pump dredging system for trailing suction hopper dredgers suitable for multiple working conditions, as described in claim 3, is characterized in that... In medium-deep water conditions with a dredging depth of less than 45m and between 45m and 70m, a dual submersible pump and dual rake dredging mode is adopted: The mud and sand sucked in by the right rake head (5) are transported to pipeline B of the pipeline assembly via the right submersible pump (7) and then introduced into the mud tank for storage. The path is: right rake head (5) → right submersible pump (7) → pipeline B → mud tank. The mud and sand sucked in by the left rake head (4) are transported to pipeline A of the pipeline assembly by the left submersible pump (6) and then introduced into the mud tank for storage. The path is: left rake head (4) → left submersible pump (6) → pipeline A → mud tank. When digging to a depth of 45m to 70m, the right rake head (5) and the left rake head (4) are adapted to the deep water operation requirements by extending the rake arm.
5. A distributed mud pump dredging system for trailing suction hopper dredgers suitable for multiple working conditions, as described in claim 3, is characterized in that... In ultra-deep water conditions with a dredging depth of 70m to 120m, a single-rake dredging mode is adopted, consisting of the right submersible pump (7) connected in series with the first in-chamber mud pump (1). When digging to a depth of 70m to 120m, the rake arm connected to the right rake head (5) is further lengthened to meet the requirements of ultra-deep water operations; The mud collected by the right rake head (5) is sequentially introduced into the mud chamber through the right submersible pump (7), the mud pump in the first chamber (1), pipeline C of the pipeline assembly, and pipeline A. The path is: right rake head (5) → right submersible pump (7) → mud pump in the first chamber (1) → C → A → mud chamber.
6. A distributed mud pump dredging system for trailing suction hopper dredgers suitable for multiple working conditions, as described in claim 3, is characterized in that... In special dredging conditions where underwater pumps are isolated or under maintenance, the first in-chamber mud pump (1) operates alone: After the underwater pump on the isolation rake arm of the dredging pipeline is replaced, the mud and sand collected by the left rake head (4) is introduced into the mud chamber through the mud pump (1) in the first chamber, pipeline C of the pipeline assembly and pipeline A. The path is: right rake head (5) → right underwater pump (7) → mud pump (1) in the first chamber → pipeline C → pipeline A → mud chamber.
7. A distributed mud pump dredging system for trailing suction hopper dredgers suitable for multiple working conditions, as described in claim 5, is characterized in that... It has at least two operating modes under bow blowdown or bow jetting conditions: Mode 1 is that the mud pump (1) in the first compartment operates alone, and the mud and sand in the mud compartment are transported to the bow filling device in sequence through the mud pump (1) in the first compartment and pipeline C of the pipeline assembly. Mode 2 involves the first in-tank mud pump (1) and the second in-tank mud pump (2) operating in series. The mud and sand in the mud tank are transported sequentially to the bow filling device via the second in-tank mud pump (2), pipeline E, pipeline D, the first in-tank mud pump (1), and pipeline C.
8. A distributed mud pump dredging system for trailing suction hopper dredgers suitable for multiple working conditions, as described in claim 7, is characterized in that... The bow blasting or bow spraying operation also includes a separate operation mode for the mud pump (2) in the second compartment. The mud compartment is connected to the bow blasting device in sequence through the mud pump (2) in the second compartment, pipeline E, pipeline A and pipeline C of the pipeline assembly.
9. A distributed mud pump dredging system for trailing suction hopper dredgers suitable for multiple working conditions, as described in claim 3, is characterized in that... Under backfilling conditions, the second in-chamber mud pump (2) operates independently: The mud hopper is connected to the left rake pipe sequentially via the mud pump (2) in the second hopper, pipeline E, and pipeline D; or The mud hopper is connected to the right rake pipe in sequence via the mud pump (2) in the second hopper, pipeline E, and pipeline D.
10. A distributed mud pump dredging system for trailing suction hopper dredgers suitable for multiple working conditions, as described in claim 1, is characterized in that... The direction of the first chamber mud pump (1) and the second chamber mud pump (2) viewed from the mud pump inlet side is clockwise.