Trailing suction type dredger

Abstract

The utility model provides a trailing suction type dredger which comprises a main dredger body, a dredger head, a dredger head, a dredger head, a dredger head and a dredger tail, a mud cabin is arranged in the main dredger body, the bow of the main dredger body is an upright bow, and the stern of the main dredger body is a double-tail-fin stern; the two groups of raking suction pipe devices are arranged on the main ship body along the length direction of the main ship body, and each group of raking suction pipe devices is respectively communicated with the mud cabin and is respectively used for dredging underwater silt and sucking the underwater silt into the mud cabin. According to the drag suction type dredger, the floating condition requirement of the working condition can be met.

Description

Technical Field

[0001] This utility model relates to the field of shipbuilding technology, specifically to a trailing suction hopper dredger. Background Technology

[0002] Trailing suction hopper dredgers are the mainstay of dredging vessels, capable of completing all four dredging operations (dredging, loading, transporting, and unloading) with high production efficiency and strong environmental adaptability. In recent years, to optimize shallow-water resistance performance, trailing suction hopper dredgers have increasingly adopted long bulbous bows. However, trailing suction hopper dredgers typically operate at low speeds (2-5 knots), where the drag reduction effect of the bulbous bow decreases significantly, and may even lead to increased energy consumption due to increased shape drag, impacting economic efficiency. Furthermore, the design and construction of bulbous bows incur additional costs, but their advantages are only apparent in non-operational sections (dispatch operations). For trailing suction hopper dredgers primarily used in operational sections, the overall cost-effectiveness is relatively low. Utility Model Content

[0003] In view of this, the present invention provides a trailing suction hopper dredger that can reduce energy consumption and lower production costs.

[0004] To solve at least one of the above-mentioned technical problems, the present invention adopts the following technical solution:

[0005] A trailing suction hopper dredger according to an embodiment of the present utility model includes:

[0006] The main hull contains mud chambers, and the bow of the main hull is a vertical bow, while the stern of the main hull is a twin-fin stern.

[0007] Two sets of suction pipe devices are installed on the main hull along the length of the main hull, and each set of suction pipe devices is connected to the mud tank. Each set of suction pipe devices is used to dredge the mud and sand at the bottom of the water and suck the mud and sand into the mud tank.

[0008] In one embodiment of this utility model, the trailing suction hopper dredger further includes:

[0009] The drive unit is located in the main hull and is used to propel the main hull.

[0010] In one embodiment of this utility model, the driving device includes:

[0011] The main diesel engine is located in the engine room at the stern of the main hull.

[0012] The reduction gearbox is connected to the output shaft of the main diesel engine.

[0013] The adjustable pitch propeller is located at the stern of the main hull and connected to the output shaft of the reduction gearbox.

[0014] In one embodiment of this utility model, the driving device further includes:

[0015] A shaft-driven generator is connected to the output shaft of a reduction gearbox.

[0016] In one embodiment of this utility model, a flow guide is provided on the adjustable pitch propeller.

[0017] In one embodiment of this utility model, each set of rake suction pipe devices includes:

[0018] The mud pump motor is located in the pump room at the bow of the main hull and is electrically connected to the shaft-driven generator.

[0019] Mud pump, mud pump motor is used to drive the mud pump to work;

[0020] The rake suction pipe has one end detachably connected to the mud pump, and the other end is equipped with a rake head. The rake head is used to dredge the mud and sand at the bottom of the water, and the mud pump is used to suck the mud and sand dredged by the rake head into the mud chamber through the rake suction pipe.

[0021] In one embodiment of this utility model, the trailing suction hopper dredger further includes:

[0022] Two extended rake pipes are detachably connected. The two extended rake pipes are used to detachably connect to their respective mud pumps and rake suction pipes when the working depth is greater than a first predetermined depth and less than a second predetermined depth, or to connect into one extended rake pipe when the working depth is greater than the second predetermined depth and detachably connect to the mud pumps and rake suction pipes of one of the rake suction pipe devices.

[0023] In one embodiment of this utility model, the trailing suction hopper dredger further includes a high-pressure water flushing device, which comprises:

[0024] The water pump motor is located in the pump room at the bow of the main hull and is electrically connected to the shaft-driven generator.

[0025] High-pressure water pump; the pump motor is used to drive the high-pressure water pump.

[0026] The high-pressure water pipe is connected at one end to a high-pressure water pump and at the other end to a rake head. The high-pressure water pump is used to pump high-pressure water into the rake head through the high-pressure water pipe to assist the rake head in dredging the mud and sand at the bottom of the water.

[0027] In one embodiment of this utility model, bow thrusters are respectively provided on both sides of the bow of the main hull, and shaft-driven generators are electrically connected to each bow thruster.

[0028] In one embodiment of this utility model, the bottom of the mud chamber is provided with multiple square mud gates, which are used to discharge mud and sand from the mud chamber.

[0029] The above-mentioned technical solution of this utility model has at least one of the following beneficial effects:

[0030] This utility model relates to a trailing suction hopper dredger. By designing the bow of the main hull as an upright type, it can reduce resistance during dispatching and low-speed operation, meeting the buoyancy requirements for low-speed operation and achieving good resistance performance. It also reduces design and construction costs. Furthermore, by designing the stern of the main hull as a twin-fin stern, the length of the mud hopper can be increased, thereby improving propulsion efficiency. Attached Figure Description

[0031] Figure 1 This is a side sectional view of a trailing suction hopper dredger in one embodiment of the present invention;

[0032] Figure 2 This is a top sectional view of a trailing suction hopper dredger in one embodiment of the present invention;

[0033] Figure 3 This is a top sectional view of a trailing suction hopper dredger in one embodiment of the present invention;

[0034] Figure label:

[0035] 100. Main hull; 101. Vertical bow; 102. Twin-fin stern; 103. Bow ballast tank; 104. Living quarters and bridge; 105. Traveling crane; 110. Mud tank; 111. Square mud gate;

[0036] 200. Rake suction pipe device; 210. Mud pump motor; 220. Mud pump; 230. Rake suction pipe; 231. Rake head;

[0037] 300. Drive unit; 310. Main diesel engine; 320. Reduction gearbox; 330. Adjustable pitch propeller; 340. Shaft-driven generator; 410. Water pump motor; 420. High-pressure flushing water pump; 500. Bow thruster. Detailed Implementation

[0038] To make the objectives, technical solutions, and advantages of the embodiments of this utility model clearer, the technical solutions of the embodiments of this utility model will be clearly and completely described below with reference to the accompanying drawings. Obviously, the described embodiments are only some, not all, of the embodiments of this utility model. All other embodiments obtained by those skilled in the art based on the described embodiments of this utility model are within the protection scope of this utility model.

[0039] The following is a detailed description of a trailing suction hopper dredger according to an embodiment of the present invention, with reference to the accompanying drawings.

[0040] like Figures 1-3 As shown, the trailing suction hopper dredger of this utility model embodiment may include: a main hull 100 and two sets of trailing suction pipe devices 200. The main hull 100 contains a mud chamber 110, the bow of the main hull 100 is a vertical bow 101, and the stern of the main hull 100 is a double-fin stern 102. The two sets of trailing suction pipe devices 200 are arranged along the length of the main hull 100, and each set of trailing suction pipe devices 200 is connected to the mud chamber 110. Each set of trailing suction pipe devices 200 is used to dredge the sediment at the bottom of the water and suck it into the mud chamber 110.

[0041] In this embodiment, by setting the bow of the main hull 100 to an upright bow 101, resistance can be reduced during troop movements and low-speed operations, meeting the buoyancy requirements for low-speed operations and achieving good resistance performance. This also reduces design and construction costs. Simultaneously, by setting the stern of the main hull 100 to a twin-fin stern 102, the length of the mud hopper 110 can be increased, improving propulsion efficiency. Furthermore, by installing two sets of suction hopper devices 200, double-scraper dredging operations can be performed, effectively improving operational efficiency.

[0042] As shown in Figure 3, the trailing suction hopper dredger also includes a drive unit 300, which is located in the main hull 100 and is used to propel the main hull 100. Specifically, the drive unit 300 may include a main diesel engine 310, a reduction gearbox 320, and a pitch-adjustable propeller 330. The main diesel engine 310 is located in the engine room at the stern of the main hull 100; the reduction gearbox 320 is connected to the output shaft of the main diesel engine 310; and the pitch-adjustable propeller 330 is located at the stern of the main hull 100 and connected to the output shaft of the reduction gearbox 320. The pitch-adjustable propeller 330 can be adjusted using an existing adjustment mechanism, which will not be elaborated further here.

[0043] In this embodiment, the drive unit 300 may include two sets, thereby providing sufficient power for the trailing suction hopper dredger. Specifically, the main diesel engine 310 has high thermal efficiency and low fuel consumption, enabling the trailing suction hopper dredger to operate for extended periods. Simultaneously, by incorporating a reduction gearbox 320, the high-speed output of the main diesel engine 310 can be converted into the low-speed, high-torque required by the adjustable-pitch propeller 330, improving transmission efficiency. Furthermore, the angle of the blades of the adjustable-pitch propeller 330 can be adjusted to adapt to different speeds and load conditions under both dispatch and low-speed operation conditions of the trailing suction hopper dredger, improving propulsion efficiency and maneuverability.

[0044] In one embodiment of this utility model, a flow deflector (not shown) is provided on the adjustable-pitch propeller 330. The flow deflector can improve the streamline of water flow through the adjustable-pitch propeller 330, making the water flow more concentrated and smooth, and improving the propulsion efficiency during low-speed operation.

[0045] like Figures 1-3 As shown, each set of dredging suction pipe devices 200 includes: a mud pump motor 210, a mud pump 220, and a dredging suction pipe 230. The mud pump motor 210 is located in the pump compartment at the bow of the main hull 100 and is electrically connected to the shaft-driven generator 340. The mud pump motor 210 drives the mud pump 220. One end of the dredging suction pipe 230 is detachably connected to the mud pump 220, and the other end of the dredging suction pipe 230 is equipped with a rake head 231. The rake head 231 is used to dredge mud and sand from the bottom of the water. The mud pump 220 sucks the mud and sand dredged by the rake head 231 into the mud compartment 110 through the dredging suction pipe 230.

[0046] In this embodiment, when the trailing suction hopper dredger is operating at low speed, the suction pipe 230 can be lowered into the water. After the rake head 231 penetrates the bottom sediment, the dredger moves forward, dredging the sediment through the rake head 231. At this time, the mud pump 220 can suck the dredged sediment through the suction pipe 230 into the mud chamber 110 for subsequent land reclamation or backfilling. This enables the dredging of tunnels and the excavation of trenches.

[0047] In one embodiment of the present invention, the trailing suction hopper dredger further includes: two extended trailing pipes, which are detachably connected. The two extended trailing pipes are used to be detachably connected to their respective mud pumps 220 and trailing suction pipes 230 when the working depth is greater than a first predetermined depth and less than a second predetermined depth, or to be connected into one extended trailing pipe when the working depth is greater than the second predetermined depth, and detachably connected to the mud pumps 220 and trailing suction pipes 230 of one of the sets of trailing suction pipe devices 200 (e.g., the starboard side).

[0048] In this embodiment, when the working depth is less than the first predetermined depth, for example, less than 40 meters, the suction pipe 230 can be used alone. When the working depth is greater than the first predetermined depth but less than the second predetermined depth, for example, greater than 40 meters but less than 70 meters, two extended suction pipes can be used to connect the corresponding mud pump 220 and suction pipe 230. Furthermore, when the working depth is greater than the second predetermined depth, for example, greater than 70 meters, the two extended suction pipes can be first connected into one extended suction pipe, and then this extended suction pipe can be connected to the mud pump 220 and suction pipe 230 on the starboard side. This effectively extends the working depth and improves versatility.

[0049] like Figures 1-3As shown, the trailing suction hopper dredger also includes two sets of high-pressure flushing devices corresponding to the two sets of trailing suction pipe devices 200. Each set of high-pressure flushing devices includes: a water pump motor 410, a high-pressure flushing pump 420, and a high-pressure water pipe. The water pump motor 410 is located in the pump room at the bow of the main hull 100 and is electrically connected to the shaft-driven generator 340. The water pump motor 410 drives the high-pressure flushing pump 420. One end of the high-pressure water pipe is connected to the high-pressure flushing pump 420, and the other end is connected to the corresponding rake head 231. The high-pressure flushing pump 420 pumps high-pressure water into the rake head 231 through the high-pressure water pipe to assist the rake head 231 in dredging the mud and sand at the bottom of the water. This reduces the tension on the rake head 231, prevents damage to the trailing suction pipe 230, and improves the smoothness of the rake head 231 during dredging operations.

[0050] like Figure 1 As shown, bow thrusters 500 are installed on both sides of the bow of the main hull 100. The bow thrusters 500 improve the maneuverability of the trailing suction hopper dredger. They can be remotely controlled from the cab, enabling dynamic positioning (DP) and dynamic tracking (DT) functions.

[0051] like Figure 1 As shown, the bottom of the mud tank 110 is provided with multiple square mud gates 111, which are used to discharge mud and sand from the mud tank 110. The multiple square mud gates 111 are arranged in a single row along the length of the main hull 100. This can improve the longitudinal strength of the main hull 100.

[0052] like Figure 1 and Figure 2 As shown, the trailing suction hopper dredger also includes: a living quarters and a wheelhouse 104, and a traveling crane 105 mounted on the main deck. The living quarters and wheelhouse 104 are located on the bow deck of the main hull 100, away from the drive unit 300, thus isolating the vessel from vibration and noise and improving the comfort of personnel working and living. The traveling crane 105 is mounted on the deck of the main hull 100 and can be used for equipment maintenance and lifting heavy objects, thereby improving the vessel's self-sufficiency.

[0053] like Figure 1 and Figure 3As shown, the drive unit 300 also includes a shaft-driven generator 340, which is connected to the output shaft of the reduction gearbox 320. The shaft-driven generator 340 is electrically connected to the mud pump motor 210, the water pump motor 410, the bow thruster 500, the living quarters and driver's cab 104, and the traveling crane 105, respectively. The shaft-driven generator 340 provides power to the mud pump motor 210, the water pump motor 410, the bow thruster 500, the living quarters and driver's cab 104, and the traveling crane 105. Therefore, the vessel can be equipped with only two main diesel engines 310, which, through a one-to-two combined drive system, simultaneously drive the adjustable-pitch propeller 330 and the shaft-driven generator 340. This provides power for the main hull 100 and supplies power to the mud pump motor 210, water pump motor 410, bow thruster 500, living quarters and wheelhouse 104, and traveling crane 105, thus achieving power supply for the entire vessel. This improves fuel efficiency, saves energy, and eliminates the need for auxiliary diesel engines, saving engine room space. Furthermore, power can be allocated as needed, reducing the vessel's total installed power.

[0054] like Figure 1 As shown, a bow ballast tank 103 is provided at the bow of the main hull 100. The bow ballast tank 103 can adjust the longitudinal trim of the main hull 100 under the dispatching conditions, so that the main hull 100 can maintain a good buoyancy without ballast water under the operating draft conditions.

[0055] In summary, the trailing suction hopper dredger of this invention, by setting the bow of the main hull 100 to an upright bow 101, can reduce resistance during dispatching and low-speed operation, meet the buoyancy requirements for low-speed operation, achieve good resistance performance under low-speed operation, and simultaneously reduce design and construction costs. Furthermore, by setting the stern of the main hull 100 to a twin-fin stern 102, the length of the mud hopper 110 can be increased, while improving propulsion efficiency. For example, the mud hopper 110 of the trailing suction hopper dredger of this application can have a capacity of 40,000 m³. 3 The maximum dredging capacity can reach over 66,000 tons, and the maximum dredging depth can reach 125m. The trailing suction hopper dredger of this application uses two sets of trailing suction pipe devices 200 and two sets of adjustable pitch propellers 330 for propulsion and trailing suction dredging. It also features an upright bow 101, a twin-fin stern 102, a bow thruster 500, a full-length deck, a streamlined optimized hull, and a forecastle-type hull structure. It can be used primarily for dredging hard soil and deep-sea sand extraction, while also undertaking dredging, reclamation, coastal maintenance, deep-sea trench excavation and backfilling projects in domestic and international ports and deep-water channels. It can navigate in unlimited navigation areas.

[0056] Unless otherwise defined, the technical or scientific terms used in this invention shall have the ordinary meaning understood by one of ordinary skill in the art to which this invention pertains. The terms "first," "second," and similar terms used in this invention do not indicate any order, quantity, or importance, but are merely used to distinguish different components. Similarly, the terms "a" or "one," etc., do not indicate a quantity limitation, but rather indicate the presence of at least one. The terms "connected" or "linked," etc., are not limited to physical or mechanical connections, but can include electrical connections, whether direct or indirect. "Up," "down," "left," "right," etc., are used only to indicate relative positional relationships; when the absolute position of the described object changes, the relative positional relationship also changes accordingly.

[0057] The above are preferred embodiments of the present utility model. It should be noted that for those skilled in the art, several improvements and modifications can be made without departing from the principle of the present utility model, and these improvements and modifications should also be considered within the protection scope of the present utility model.

Claims

1. A trailing suction hopper dredger, characterized in that, include: The main hull is equipped with a mud chamber, the bow of the main hull is a vertical bow, and the stern of the main hull is a twin-fin stern. Two sets of suction pipe devices are installed on the main hull along the length of the main hull, and each set of suction pipe devices is connected to the mud tank. Each set of suction pipe devices is used to dredge the mud and sand at the bottom of the water and suck the mud and sand into the mud tank.

2. The trailing suction hopper dredger according to claim 1, characterized in that, Also includes: A drive unit is disposed in the main hull and is used to drive the main hull to sail.

3. The trailing suction hopper dredger according to claim 2, characterized in that, The driving device includes: The main diesel engine is located in the engine room at the stern of the main hull; A reduction gearbox, which is connected to the output shaft of the main diesel engine; An adjustable pitch propeller is located at the stern of the main hull and connected to the output shaft of the reduction gearbox.

4. The trailing suction hopper dredger according to claim 3, characterized in that, The drive device further includes: A shaft-driven generator is connected to the output shaft of the reduction gearbox.

5. The trailing suction hopper dredger according to claim 3, characterized in that, The adjustable pitch propeller is equipped with a flow guide.

6. The trailing suction hopper dredger according to claim 4, characterized in that, Each set of the rake suction pipe device includes: A mud pump motor is installed in a pump compartment at the bow of the main hull and is electrically connected to the shaft-driven generator. A mud pump, wherein the mud pump motor is used to drive the mud pump to work; The rake suction pipe has one end detachably connected to the mud pump, and the other end of the rake suction pipe is provided with a rake head. The rake head is used to dredge the mud and sand at the bottom of the water, and the mud pump is used to suck the mud and sand dredged by the rake head into the mud chamber through the rake suction pipe.

7. The trailing suction hopper dredger according to claim 6, characterized in that, Also includes: Two extended rake pipes are detachably connected. The two extended rake pipes are used to be detachably connected to their respective mud pumps and rake suction pipes when the working depth is greater than a first predetermined depth and less than a second predetermined depth, or to be connected into one extended rake pipe when the working depth is greater than the second predetermined depth and detachably connected to the mud pump and rake suction pipe of one of the sets of rake suction pipe devices.

8. The trailing suction hopper dredger according to claim 6, characterized in that, It also includes a high-pressure water flushing device, which comprises: A water pump motor is installed in a pump compartment at the bow of the main hull and is electrically connected to the shaft-driven generator. A high-pressure water pump, wherein the pump motor is used to drive the high-pressure water pump to work; A high-pressure water pipe is provided, with one end connected to a high-pressure flushing pump and the other end connected to a rake head. The high-pressure flushing pump is used to pump high-pressure water into the rake head through the high-pressure water pipe to assist the rake head in dredging the mud and sand at the bottom of the water.

9. The trailing suction hopper dredger according to claim 4, characterized in that, Bow thrusters are installed on both sides of the bow of the main hull, and the shaft-driven generator is electrically connected to each of the bow thrusters.

10. The trailing suction hopper dredger according to claim 1, characterized in that, The bottom of the mud chamber is equipped with multiple square mud gates, which are used to discharge mud and sand from the mud chamber.

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