A high-pressure water flushing system for W-shaped mud tanks of large-scale trailing suction dredgers

Abstract

The utility model discloses a high pressure flush system for W type mud cabin of large scale drag suction dredger, is arranged and is installed on the triangular cabin in the mud cabin, is equipped with a plurality of flush units along the length direction interval of mud cabin, and each flush unit is connected through the water inlet branch pipe and is arranged in the water supply main pipe of the lower part of triangular cabin. In each flush unit, the water inlet branch pipe is connected to the inlet end of flush main pipe, a plurality of first nozzles are arranged on both sides of the length direction, and the jet direction is parallel to the adjacent cabin wall of triangular cabin. Two flush branch pipes extend downward from both sides of flush main pipe along the surface of triangular cabin to the top of mud door of mud cabin bottom, and each end is connected with a horizontal branch pipe, the horizontal branch pipe surrounds the top area of mud door, a plurality of second nozzles are arranged at intervals, and the jet direction is towards mud door. The utility model realizes the three -level collaborative flushing system of the inclined plane of triangular cabin, main mud door and end mud door for the first time in the scene of W type mud cabin, adopts the combined application of structure symbiotic type pipeline layout and rotational flow flushing and directional jet, can effectively flush and dilute mud under the two conditions of opening mud door and starting to pump cabin, is favorable to emptying mud cabin, provides the innovative scheme for the industry dredging.

Description

Technical Field

[0001] This utility model belongs to the technical field of trailing suction hopper dredgers, and particularly relates to a high-pressure water flushing system for the W-shaped mud hopper of a large trailing suction hopper dredger. Background Technology

[0002] In dredging operations using large trailing suction hopper dredgers, the W-shaped mud hopper plays a crucial role due to its unique triangular structure that increases capacity. However, this special structure also brings about mud hopper deposition problems, especially in the mud door area at the bottom of the mud hopper and the sloping walls of the triangular hopper. Due to the complex structure and insufficient water flow dynamics, stubborn sediment layers are easily formed, seriously affecting dredging efficiency and the normal operation of the vessel.

[0003] Traditional high-pressure flushing systems mostly employ a straight-pipe spray design, which has significant drawbacks. In the mud gate area, conventional systems concentrate nozzles on the upper and middle parts of the bulkhead. The area above the mud gate near the bottom of the mud tank suffers from insufficient flushing due to its concealed location and limited piping layout. Hardened deposits can lead to mud gate seal failure and even hydraulic malfunctions. For the sloping surfaces of triangular tanks, existing flushing units mostly use single-sided, unidirectional nozzles, resulting in uneven flushing coverage and numerous blind spots. Repeated flushing is required to achieve a cleaning effect, significantly increasing energy consumption. Furthermore, the mud gates at the fore and stern of the mud tank are far from the main flushing unit, and current technology lacks targeted flushing methods, relying solely on manual cleaning, which is extremely inefficient.

[0004] Currently, there is no high-pressure flushing system that can perfectly adapt to the W-shaped mud chamber structure, making it impossible to achieve efficient dredging of the triangular chamber ramp, main mud gate, and end mud gates in all dimensions. Therefore, developing a high-pressure flushing system that can effectively solve the above problems is of great significance for improving the dredging efficiency of large trailing suction hopper dredgers, reducing operating costs, and ensuring the safe and stable operation of the vessels. Utility Model Content

[0005] To address the problems existing in the prior art, this utility model provides a high-pressure flushing system that can effectively solve the above-mentioned problems. This high-pressure flushing system is designed for the W-type mud tank of a large trailing suction hopper dredger, which improves the dredging efficiency and reduces the operating costs of such dredgers.

[0006] This utility model is implemented as follows: a high-pressure flushing system for a W-shaped mud hopper of a large trailing suction hopper dredger is arranged and installed on a triangular compartment inside the mud hopper, with multiple flushing units spaced apart along the length of the mud hopper; each flushing unit is connected to a main water supply pipe via an inlet branch pipe, the main water supply pipe being located at the lower part of the triangular compartment; characterized in that each flushing unit includes: a main flushing pipe, the inlet end of which is connected to a corresponding inlet branch pipe, the main flushing pipe having multiple first nozzles on both sides along its length, the spraying direction of which is towards the adjacent triangular compartment wall; two flushing branch pipes extending downward from both sides of the main flushing pipe along the surface of the triangular compartment to above the mud gate at the bottom of the mud hopper, each flushing branch pipe having a horizontal branch pipe connected at its end; the horizontal branch pipe is arranged around the area above the mud gate, with multiple second nozzles spaced apart on it, the spraying direction of which is towards the mud gate.

[0007] More preferably, the first nozzles are arranged in pairs or staggered on both sides of the main flush pipe.

[0008] More preferably, the spray direction of the first nozzle forms an acute angle with the adjacent triangular cabin wall surface.

[0009] More preferably, the spray angle of the first nozzle is 40-60 degrees, and the spacing between the first nozzles is 1500-1700 mm.

[0010] More preferably, the flushing area enclosed by the horizontal branch pipes is rectangular or annular.

[0011] More preferably, the injection axis of the second nozzle is inclined at an angle to the mud gate surface, and all nozzles have the same inclination angle, configured to form a vortex during injection.

[0012] More preferably, the spray angle of the second nozzle is 25 to 30 degrees, and the spacing between the second nozzles is 1200 to 1300 mm.

[0013] In a further preferred embodiment, in the flushing units located at both ends of the mud chamber, the main flushing pipe extends to the end of the mud chamber; parallel tail flushing branch pipes are provided on both sides of the main flushing pipe, extending to the side plate area of ​​the mud chamber; a third nozzle is provided on the tail flushing branch pipe, and its spray direction is towards the mud gate.

[0014] More preferably, the ends of the two flushing branch pipes and the tail flushing branch pipe are connected to the fourth nozzle through a reducing pipe.

[0015] More preferably, at least one of the first nozzle, the second nozzle, the third nozzle, and the fourth nozzle is a detachable nozzle structure.

[0016] The advantages and technical effects of this utility model are as follows: The overall technical effect of the high-pressure water flushing system of this utility model is significant, specifically reflected in the following aspects: Comprehensive dredging coverage: Systematic dredging is achieved for different parts of the W-shaped mud chamber. The first nozzle directionally flushes the sediment layer on the inclined surface of the triangular chamber, solving the blind spots of the inclined surface coverage in traditional systems; the horizontal branch pipes around the mud gate and the multi-angle second nozzles form a three-dimensional flushing network, improving the cleaning effect in the mud gate area; the newly added tail flushing branch pipe and third nozzle specifically solve the problem of sediment accumulation at the end of the mud gate, reducing manual cleaning.

[0017] Power optimization and adaptation: The second nozzle is configured at the same angle to form a swirling scouring field, which enhances the breaking ability of the slab layer; the flushing branch pipe extends along the surface of the triangular chamber, fitting the complex geometry and reducing water pressure loss; the flushing unit can be expanded and arranged to adapt to the modification of mud chambers of different sizes.

[0018] Convenient and efficient operation and maintenance: The detachable nozzle design facilitates the replacement of worn parts and reduces maintenance complexity; the zone control unit starts and stops the flushing operation as needed, optimizing the use of water and electricity resources.

[0019] In summary, this invention is the first to achieve a three-stage synergistic flushing system, a structurally symbiotic pipeline layout, and a combined application of swirling flushing and directional jetting in a W-shaped mud tank scenario. Furthermore, under both mud gate opening and tank evacuation operation conditions, this invention can effectively flush and dilute the mud, facilitating the emptying of the mud tank and providing an innovative solution to the industry's dredging challenges. Attached Figure Description

[0020] Figure 1 This is a schematic diagram of the structure of this utility model; Figure 2 yes Figure 1 Top view; Figure 3 yes Figure 2 Sectional view of AA; Figure 4 yes Figure 2 BB section view; Figure 5 This is a schematic diagram of the flushing unit structure; Figure 6 This is a schematic diagram of a flushing unit with a tail flushing branch pipe; In the diagram: 10. Mud chamber; 11. Triangular chamber; 2. Flushing unit; 21. Flushing main pipe; 22. Inlet branch pipe; 23. First nozzle; 24. Flushing branch pipe; 25. Horizontal branch pipe; 26. Second nozzle; 27. Mud gate; 28. Tail flushing branch pipe; 29. ​​Third nozzle; 30. Fourth nozzle; 3. Water supply main pipe; 41. Control valve. Detailed Implementation

[0021] To make the objectives, technical solutions, and advantages of this utility model clearer, the following detailed description is provided in conjunction with embodiments. It should be understood that the specific embodiments described herein are merely illustrative and not intended to limit the scope of this utility model.

[0022] Please see Figures 1 to 6 A high-pressure flushing system for the W-shaped mud hopper of a large trailing suction hopper dredger is disclosed. The system is installed on a triangular compartment 11 within the mud hopper 10, with multiple flushing units 2 spaced along the length of the hopper. Each flushing unit is connected to a main water supply pipe 3 via an inlet branch pipe 4. Each inlet branch pipe 4 is independently equipped with a control valve 4 to control the opening or closing of the inlet branch pipe. The main water supply pipe is located at the lower part of the triangular compartment. Each flushing unit 2 includes a main flushing pipe 21, with its inlet end connected to a corresponding inlet branch pipe 22. Multiple first nozzles 23 are provided on both sides of the main flushing pipe along its length, with their spray direction facing the adjacent triangular compartment wall. This design allows the high-pressure water flow to directly act on the triangular compartment wall. The water flow from the first nozzles effectively flushes away the silt adhering to the surface of the compartment wall, preventing the silt from accumulating and hardening on the wall. Because the water flow directly impacts the compartment wall, it breaks the adhesion between the silt and the wall, peeling the silt off the wall and reducing corrosion caused by silt accumulation and the difficulty of subsequent cleaning. Meanwhile, the continuous flushing action keeps the surface of the bulkhead clean, reduces the risk of silt accumulation affecting the overall structural stability of the mud hopper, ensures that the mud hopper can function normally during dredging operations, and improves dredging efficiency and ship operation safety.

[0023] Two flushing branch pipes 24 extend downwards from both sides of the main flushing pipe along the surface of the triangular chamber to the top of the mud gate at the bottom of the mud chamber. Each flushing branch pipe is connected to a horizontal branch pipe 25 at its end. These horizontal branch pipes are arranged around the area above the mud gate, with multiple second nozzles 26 spaced apart on them, spraying towards the mud gate 27. This targeted design allows the high-pressure water flow to directly act on the area above the mud gate, effectively flushing away the silt adhering to the mud gate and surrounding area. During dredging operations, silt easily accumulates above the mud gate. If not cleaned in time, this can lead to problems such as poor sealing and difficulty in opening the mud gate. The second nozzles, through continuous water jetting, can quickly peel and flush away the silt from the surface of the mud gate, greatly improving the cleaning efficiency of the area above the mud gate, ensuring the mud gate can be opened and closed normally, and ensuring that the mud chamber's sludge discharge function is not affected.

[0024] Preferably, the first nozzles 23 are arranged in pairs or staggered on both sides of the main flushing pipe. The paired or staggered arrangement of the first nozzles expands the water flow coverage area and eliminates blind spots in the flushing process. The paired arrangement allows the two water streams to cooperate, forming a stronger flushing force and improving the cleaning effect on the bulkhead; the staggered arrangement ensures that different locations are flushed evenly, avoiding insufficient flushing in certain areas. This arrangement reduces the number of repeated flushes, lowers energy consumption and water usage, and also improves flushing efficiency, allowing the triangular bulkhead to be cleaned faster and more thoroughly, ensuring a clean internal environment for the mud tank and facilitating continuous dredging operations.

[0025] Further preferably, the spray direction of the first nozzle forms an acute angle with the adjacent triangular compartment wall surface. This acute angle allows the water flow to impact the wall at a certain angle. This inclined impact increases the shear force of the water flow on the silt, more effectively peeling the silt from the wall surface. Compared to vertical impact, the inclined impact better adapts to the unevenness of the wall surface, penetrating deep into the gaps between the silt and the wall, improving the thoroughness of the flushing. Furthermore, the inclined water flow can also carry the peeled silt down the wall, reducing silt residue on the wall and further enhancing the flushing effect, ensuring the triangular compartment wall always maintains good working condition.

[0026] More preferably, the spray angle of the first nozzle is 40-60 degrees, and the spacing between the first nozzles is 1500-1700 mm. In this embodiment, the preferred spray angle is 45 degrees, and the spacing is 1500 mm. The specific spray angle and spacing are carefully designed. The spray angle determines the coverage area and impact force of the water flow. A suitable spray angle allows the water flow to effectively cover the bulkhead while maintaining sufficient impact force to flush away the silt. The specific nozzle spacing ensures the uniformity of water flow distribution, avoiding overlapping or blank areas. This design improves flushing efficiency and ensures flushing quality, enabling rapid and comprehensive cleaning of silt from the triangular bulkhead, reducing localized silt accumulation caused by uneven flushing, ensuring the normal operation of the mud tank, and reducing subsequent maintenance costs.

[0027] Preferably, the flushing area formed by the horizontal branch pipes 25 is rectangular or annular. This rectangular or annular flushing area can fully cover the area above the dredging gate. The rectangular area can uniformly flush the relatively regular area above the dredging gate, ensuring that every corner is washed by the water flow; the annular area can better adapt to the circular or irregular shape above the dredging gate, achieving flushing without dead angles. This design effectively prevents sludge from accumulating above the dredging gate, avoiding dredging gate seal failure or hydraulic failure due to sludge hardening, ensuring the normal opening and closing of the dredging gate, improving the sludge discharge efficiency of the dredging chamber, and ensuring the smooth progress of dredging operations.

[0028] More preferably, the spray axis of the second nozzle 26 is inclined at an angle to the surface of the dredging gate, and all nozzles have the same inclination angle, configured to form a swirling flow during spraying. This swirling flow generates a powerful stirring and scouring effect. The inclined spray allows water to penetrate deep into the crevices and corners of the dredging gate surface, flushing out hidden silt; the swirling flow then quickly carries away the flushed silt, preventing it from redepositing on the dredging gate surface. This design significantly improves the cleaning effect of the dredging gate surface, reduces the risk of malfunctions due to silt accumulation, extends the service life of the dredging gate, and also helps improve the sludge discharge efficiency of the dredging chamber, ensuring efficient dredging operations.

[0029] More preferably, the spray angle of the second nozzle is 25-30 degrees, and the spacing between the second nozzles is 1200-1300 mm. In this embodiment, the preferred spray angle is 30 degrees and the spacing is 1200 mm. In a further preferred embodiment, in the flushing units located at both ends of the mud tank, the main flushing pipe extends to the ends of the mud tank; parallel tail flushing branch pipes 28 are provided on both sides of the main flushing pipe, extending to the side plate area of ​​the mud tank; a third nozzle 29 is provided on the tail flushing branch pipe, with its spray direction facing the mud gate. This allows for targeted flushing of the mud gates at both ends of the mud tank. Since the mud gates at both ends of the mud tank are far from the main flushing unit, conventional flushing systems cannot effectively cover them; this design overcomes this deficiency. The third nozzle on the tail flushing branch pipe can directly flush the end mud gates, removing silt from the mud gates and surrounding areas, preventing silt accumulation from affecting the normal operation of the mud gates. This ensures the cleanliness and normal operation of the mud gates at both ends of the mud tank, improves the overall mud removal efficiency of the mud tank, and ensures that dredging operations can be carried out smoothly in all parts of the mud tank.

[0030] Preferably, the ends of the two flushing branch pipes and the tail flushing branch pipe are connected to the fourth nozzle 30 via a reducing pipe. By connecting to the fourth nozzle via the reducing pipe, the pipe diameter can be adjusted according to water pressure and flow requirements, ensuring the water flow reaches its optimal state upon entering the fourth nozzle and compensating for any decrease in water pressure. The fourth nozzle can generate a stronger water flow impact force, or at least equal to, that of the other nozzles.

[0031] Further preferably, at least one of the first, second, third, and fourth nozzles is a detachable nozzle structure. During dredging operations, the nozzles may wear out or become clogged due to prolonged use. A detachable structure eliminates the need for extensive disassembly of the entire flushing system; only damaged or clogged nozzles need to be replaced. This significantly reduces maintenance time and costs, and improves equipment availability. Simultaneously, detachable nozzles facilitate the replacement of different types of nozzles according to varying dredging conditions and silt characteristics to achieve optimal flushing results and ensure the stable operation of the high-pressure flushing system in the silt chamber.

[0032] Have the nozzle pressure and mud concentration for the above nozzles been established through experiments or calculations? If so, please provide this information. The above description is only a preferred embodiment of the present utility model and is not intended to limit the present utility model. Any modifications, equivalent substitutions and improvements made within the spirit and principles of the present utility model should be included within the protection scope of the present utility model.

Claims

1. A high-pressure flushing system for a W-shaped silt chamber of a large trailing suction hopper dredger, comprising a triangular chamber installed inside the silt chamber, and multiple flushing units spaced apart along the length of the silt chamber; each flushing unit is connected to a main water supply pipe via an inlet branch pipe, the main water supply pipe being located at the lower part of the triangular chamber; Its features are, Each flushing unit includes: a main flushing pipe, with the inlet end connected to a corresponding water inlet branch pipe, and multiple first nozzles provided on both sides along the length direction of the main flushing pipe, with the spray direction parallel to the adjacent triangular compartment wall; Two flushing branch pipes extend downwards from both sides of the main flushing pipe along the surface of the triangular chamber to above the mud door at the bottom of the mud chamber. Each flushing branch pipe is connected to a horizontal branch pipe at its end. The horizontal branch pipe is arranged around the area above the mud gate, and multiple second nozzles are spaced apart on it, with the spray direction facing the mud gate.

2. The high-pressure flushing system according to claim 1, characterized in that: The first nozzles are arranged in pairs or staggered on both sides of the main flush pipe.

3. The high-pressure flushing system according to claim 2, characterized in that: The spray direction of the first nozzle forms an acute angle with the adjacent triangular cabin wall surface.

4. The high-pressure flushing system according to claim 3, characterized in that: The spray angle of the first nozzle is 40-60 degrees, and the spacing between the first nozzles is 1500-1700 mm.

5. The high-pressure flushing system according to claim 1, characterized in that: The flushing area enclosed by the horizontal branch pipes is rectangular or ring-shaped.

6. The high-pressure water flushing system according to claim 1, characterized in that: The second nozzle's spray axis is inclined at an angle to the mud gate surface, and all nozzles have the same inclination angle, configured to form a swirling flow during spraying.

7. The high-pressure flushing system according to claim 6, characterized in that: The second nozzle has a spray angle of 25 to 30 degrees and a spacing of 1200 to 1300 mm.

8. The high-pressure water flushing system according to claim 1, characterized in that: In the flushing units located at both ends of the mud chamber, the main flushing pipe extends to the end of the mud chamber; parallel tail flushing branch pipes are provided on both sides of the main flushing pipe, extending to the side plate area of ​​the mud chamber; a third nozzle is provided on the tail flushing branch pipe, and its spray direction is towards the mud gate.

9. The high-pressure flushing system according to claim 8, characterized in that: The ends of the two flushing branch pipes and the tail flushing branch pipe are connected to the fourth nozzle through a reducing pipe.

10. The high-pressure flushing system according to claim 9, characterized in that: At least one of the first nozzle, the second nozzle, the third nozzle, and the fourth nozzle is a detachable nozzle structure.

Images