A movable column-stabilized bottom-sitting aquaculture cage

Abstract

The present invention discloses a movable column-stabilized bottom-seated aquaculture cage, which relates to the field of cage technology and includes a mobile cage, feed processing equipment, and an aquaculture management platform. The mobile cage includes two pontoons, a cage frame fixed between the tops of the two pontoons, and a net arranged on the inner side of the cage frame. The pontoons are separated by watertight bulkheads to form a central pump room and multiple side ballast water tanks. The central pump room is provided with a water pump ballast system for uniformly introducing or exporting seawater into or out of each side ballast water tank; each side ballast water tank is connected to a ventilation pipe, and the ventilation pipe extends to a position above the aquaculture management platform. The mobile cage of the present invention has its own lifting and floating control capabilities and can be towed and moved in offshore waters. When the mobile cage is towed to a specified position, it can be bottom-seated in open sea areas for aquaculture operations. The feed processing equipment has functions such as feed bag storage, feed feeding, and preventing feed from sinking to the bottom.

Description

Technical Field

[0001] The invention relates to the technical field of cages, in particular to a movable column-stabilized bottom-sitting aquaculture cage. Background Art

[0002] Atlantic salmon are highly sought after in the international market due to their delicious and nutritious meat. However, they are cold-water, highly migratory fish, primarily found in the waters where the Atlantic, Pacific, and Arctic Oceans meet. They are adapted to relatively low water temperatures, typically between 10-18°C. Therefore, farmed Atlantic salmon require similar environmental conditions to ensure their healthy growth.

[0003] The overall structure of existing aquaculture cages includes a frame, floats, sinkers, nets, net covers and cables. Its structure is complex and cannot be sunk to the sea level as a whole. It can only be fixed in shallow sea areas and is not suitable for deep-sea aquaculture. Secondly, when feeding, the existing cages do not have the function of processing feed, and the feed often contains lumps, which are easily deposited at the bottom of the cage. Marine organisms are not easy to detect and eat, resulting in waste. Summary of the Invention

[0004] The object of the present invention is to provide a movable column-stabilized bottom-sitting aquaculture cage to solve the problems raised in the above-mentioned background technology.

[0005] In order to achieve the above-mentioned object of the invention, the present invention adopts the following technical solutions:

[0006] The present invention provides a movable column-stabilized bottom-sitting aquaculture cage, comprising a movable cage, feed processing equipment and an aquaculture management platform. The movable cage comprises two pontoons, a cage frame fixed between the tops of the two pontoons, and a net arranged on the inner side of the cage frame. The pontoons are separated into a central pump room and multiple side ballast water tanks by watertight bulkheads. The central pump room is provided with a water pump ballast system for uniformly introducing or exporting seawater into or out of each side ballast water tank; each side ballast water tank is connected to a ventilation pipe, and the ventilation pipe extends to a position above the aquaculture management platform; the mobile cage is provided with a set of air-blowing liquid level telemetry systems for remotely measuring the liquid level of each side ballast water tank and the draft of the four corners of the mobile cage; the aquaculture management platform is arranged on the top of the cage frame; the feed processing equipment comprises a feed feeding mechanism and an anti-sinking mechanism for preventing feed from sinking to the bottom.

[0007] Furthermore, the cage frame includes a column structure and a strut structure. The column structure and the strut structure are combined to form a rectangular truss structure with an open top. The column structure includes a plurality of columns vertically fixed on the top of the pontoon. The strut structure includes three layers of horizontal struts arranged between adjacent columns, and connecting rods arranged between adjacent horizontal struts.

[0008] Furthermore, the breeding management platform includes a main deck arranged on the top of the cage frame and a superstructure arranged on the main deck, and the superstructure is provided with a rest room, toilet, control room, engine room, fuel tank, battery room, fresh water tank and feed tank.

[0009] Furthermore, there are two sets of feed feeding mechanisms, both of which are arranged on the main deck, and include a bulk silo, a feeder, an air source device, a feed pipeline and an electrical control cabinet.

[0010] Furthermore, a slag discharge space is formed between the pair of pontoons; the feed anti-sinking mechanism is installed in the slag discharge space, and includes side plates symmetrically fixed to opposite sides of adjacent pontoons, and water spray pipes evenly arranged between the pair of side plates; wherein, a flip plate assembly is provided on both sides above the water spray pipes, and water spray holes are evenly arranged on the upper half of the water spray pipes;

[0011] The flip plate assembly includes a flip plate and a driving structure. The flip plate is rotatably installed between a pair of side plates via a rotating shaft. The driving structure includes a structure for driving the flip plate to convert between a first form and a second form around the rotating shaft. When the flip plate is in the first form, the lower sides of the two flip plates on both sides of the water pipe are in contact with the outer wall of the water pipe and are in an inverted eight shape, and the upper sides of the two flip plates between adjacent water pipes are in contact with each other and are in a straight eight shape; when the flip plate is in the second form, several flip plates are all in a vertical state.

[0012] Furthermore, a U-shaped channel is formed inside the side plate, and the U-shaped channel includes an upper channel and a lower channel parallel to each other and a connecting channel provided between one end of the upper channel and the lower channel;

[0013] A pair of side panels are respectively a first side panel and a second side panel, the connecting channels in the first side panel and the second side panel are symmetrically arranged, and the first side panel and the second side panel are both provided with a water inlet connected to an end of the upper channel away from the connecting channel;

[0014] The flip plates on both sides of the water spray pipe are respectively a first flip plate and a second flip plate, and the two ends of the rotation axis of the first flip plate and the second flip plate are respectively a passive end and an active end. The active end of the rotation axis of the first flip plate extends to the upper channel of the first side plate, where the driving structure is installed. The active end of the rotation axis of the second flip plate extends to the upper channel of the second side plate, where the driving structure is installed.

[0015] The driving structure includes a swing plate fixed to the active end and adapted to the upper channel, and a preload spring provided between the swing plate and the top of the upper channel. When the flip plate is in a first state, the preload spring is compressed, the swing plate is in a horizontal state, and a gap is formed between the swing plate and the bottom side of the lower channel. When the flip plate is in a second state, the preload spring is in a normal state, the swing plate is in an inclined state, and the lower side of the swing plate contacts the bottom side of the lower channel.

[0016] The plurality of water spray pipes include a plurality of first water spray pipes and second water spray pipes arranged at intervals, one end of the first water spray pipe is connected to the lower channel in the first side plate; one end of the second water spray pipe is connected to the lower channel in the second side plate.

[0017] Furthermore, the water pump ballast system includes a water injection pump assembly for injecting water into the corresponding water inlet.

[0018] Compared with the existing technology, one or more of the above technical solutions have the following beneficial effects:

[0019] The mobile cage of the present invention has the ability to control its own lifting and floating, and can be towed and moved in offshore waters. When the mobile cage is towed to a specified position, it can be seated on the bottom of the open sea for aquaculture operations. The feed processing equipment has the functions of storing feed in bags, feeding feed, and preventing feed from sinking to the bottom.

[0020] It is to be understood that the foregoing general description and the following detailed description are exemplary and explanatory only and are not restrictive of the invention. BRIEF DESCRIPTION OF THE DRAWINGS

[0021] The accompanying drawings, which constitute a part of the present invention, are used to provide a further understanding 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 improper limitations on the present invention.

[0022] Figure 1 It is a schematic diagram of the overall structure of the present invention;

[0023] Figure 2 It is a schematic diagram of the cross-sectional structure of the buoyancy box of the present invention;

[0024] Figure 3 This is a schematic structural diagram of the second form of the anti-sinking mechanism of the present invention;

[0025] Figure 4 This is a schematic structural diagram of the first form of the anti-sinking mechanism of the present invention;

[0026] Figure 5 yes Figure 3 Schematic diagram of the top view structure;

[0027] Figure 6 yes Figure 5AA structural diagram;

[0028] Figure 7 yes Figure 5 BB structural diagram;

[0029] Figure 8 yes Figure 7 Schematic diagram of the local structure at H;

[0030] Figure 9 yes Figure 5 Schematic diagram of CC structure;

[0031] Figure 10 yes Figure 4 Schematic diagram of the structure from above;

[0032] Figure 11 yes Figure 10 DD-direction structural diagram;

[0033] Figure 12 yes Figure 10 EE structural diagram;

[0034] Figure 13 yes Figure 10 Schematic diagram of the FF structure;

[0035] Figure 14 yes Figure 13 Schematic diagram of the local structure at G.

[0036] In the picture:

[0037] 1-Mobile cage; 11-Floating tank; 111-Middle pump room; 112-Side ballast water tank; 12-Cage frame; 2-Aquaculture management platform; 21-Main deck; 22-Superstructure; 3-Slag discharge space; 4-Side panel; 41-First side panel; 42-Second side panel; 43-U-shaped channel; 431-Upper channel; 432-Lower channel; 433-Connecting channel; 433-Water inlet; 5-Flip plate assembly; 51-Rotating shaft; 52-Flip plate; 521-First flip plate; 522-Second flip plate; 53-Drive structure; 531-Swing plate; 532-Preload spring; 6-Spray pipe; 61-Spray hole; 62-First spray pipe; 63-Second spray pipe. DETAILED DESCRIPTION

[0038] In order to enable those skilled in the art to better understand the present application, the technical solutions in the embodiments of the present application will be clearly and completely described below in conjunction with the drawings in Example 433 of the present application. Obviously, the described embodiments are only part of the embodiments of the present application, not all of the embodiments. Based on the embodiments in the present application, all other embodiments obtained by ordinary technicians in this field without making creative efforts should fall within the scope of protection of this application.

[0039] See also Figures 1-14 The present invention provides a movable, column-stabilized bottom-mounted aquaculture cage, comprising a mobile cage 1, feed processing equipment, and an aquaculture management platform 2. The mobile cage 1 has self-lifting and buoyancy control capabilities and can be towed and moved in offshore waters. When towed to a designated position, the mobile cage 1 can be bottom-mounted in open waters for aquaculture operations, performing functions such as feed bag storage, feed feeding, and preventing feed from sinking to the bottom. The aquaculture management platform 2 supports the use of a supporting vessel to facilitate feed delivery, fry placement, adult fish catching, net cleaning, and material replenishment.

[0040] Specifically, the mobile net cage 1 includes two pontoons 11, a net cage frame 12 fixed between the tops of the two pontoons 11, and a net arranged inside the net cage frame 12. The pontoons 11 are separated by watertight bulkheads into a central pump room 111 and multiple side ballast tanks 112. The central pump room 111 is equipped with a water pump ballast system for uniformly introducing or exporting seawater into or out of each side ballast tank 112. The present invention achieves lifting and lowering control and posture adjustment of the mobile net cage 1 by injecting or discharging seawater into or out of the side ballast tanks 112 through the water pump ballast system. For example, when the water pump ballast system injects seawater into the side ballast tanks 112, the weight of the mobile net cage 1 increases and the mobile net cage 1 sinks; when the water pump ballast system discharges the side ballast tanks 112, the weight of the mobile net cage 1 decreases and the mobile net cage 1 floats.

[0041] Each side ballast water tank 112 is connected to a ventilation pipe, and the ventilation pipe extends to a position above the aquaculture management platform 2. The ventilation pipeline meets the ventilation needs when injecting or discharging ballast water in the side ballast water tank 112.

[0042] The water pump ballast system includes 1 ballast water pump and 1 fire-fighting main pump. The ballast pump is a vertical self-priming centrifugal water pump, and the fire-fighting main pump is a vertical self-priming centrifugal water pump. The fire-fighting main pump can be used as an emergency backup ballast pump. When the mobile cage 1 sinks, the ballast water from multiple side ballast water tanks 112 can be sucked by the fire-fighting main pump or the ballast pump to adjust the sinking speed of the mobile cage 1 and level the mobile cage 1.

[0043] Furthermore, the mobile cage 1 is equipped with an air-blowing liquid level telemetry system that can remotely measure the liquid level of each side ballast tank 112 and the draft of the four corners of the mobile cage 1. The air-blowing liquid level telemetry system is a prior art technology, and its specific principles and structure will not be elaborated on here.

[0044] The breeding management platform 2 is arranged on the top of the cage frame 12; the feed processing equipment includes a feed feeding mechanism and an anti-sinking mechanism for preventing the feed from sinking to the bottom.

[0045] In this embodiment, the cage frame 12 includes a column structure and a strut structure. The column structure is combined with the strut structure to form a rectangular truss structure with an open top. The column structure includes a plurality of columns vertically fixed on the top of the pontoon 11, and the strut structure includes three layers of horizontal struts arranged between adjacent columns, and connecting rods arranged between adjacent horizontal struts.

[0046] In this embodiment, the breeding management platform 2 includes a main deck 21 arranged on the top of the cage frame 12, and a superstructure 22 arranged on the main deck 21. The superstructure 22 is provided with a rest room, a toilet, a control room, an engine room, a fuel tank, a battery room, a fresh water tank and a feed tank.

[0047] In this embodiment, there are two sets of feed feeding mechanisms, both of which are arranged on the main deck 21, and include a bulk silo, a feeder, an air source device, a feed pipeline, an electrical control cabinet, etc.

[0048] The feed feeding mechanism adopts pneumatic conveying, among which the feeding speed of the feeder is adjustable, which is 0-750kg / h±10% (single feeder); the feeder is equipped with 8 feeding ports. When installed 4m above the water surface, the horizontal spreading range radius is not less than 8 meters, and the spreading range is a 70°-90° horizontal fan. The electrical control cabinet can set the feeding time (not less than 10 times at the same time), feeding speed, feeding port, and feeding amount through the touch screen, and the feeding work is completed automatically. At the same time, a manual mode is set for manual control of feeding.

[0049] During the breeding period, dead fish on the water surface are manually salvaged on the main deck, and dead fish underwater are manually collected by divers through the movable openings of the underwater net.

[0050] In this specific embodiment, two high-definition, wide-angle, pan-tilt-tilt cameras are mounted on the mobile cage columns to monitor the water surface in real time. The cameras are equipped with a base, tilt, and zoom capabilities, and cover the entire surface area of ​​the cage. One surveillance camera is installed in the central pump room 111 and one in the feed storage compartment, both positioned to provide visibility of the cabin's key equipment and instruments.

[0051] like Figure 1 and Figure 4 As shown, in this embodiment, a slag discharge space 3 is formed between a pair of pontoons 11; the feed anti-sinking mechanism is installed in the slag discharge space 3, which includes side plates 4 symmetrically fixed to opposite sides of adjacent pontoons 11, and water spray pipes 6 evenly arranged between the pair of side plates 4; wherein, a flip plate assembly 5 is provided on both sides above the water spray pipes 6, and water spray holes 61 are evenly arranged on the upper half of the water spray pipes 6;

[0052] Combine Figure 3 and Figure 14 As shown, the flip plate assembly 5 includes a flip plate 52 and a driving structure 53. The flip plate 52 is rotatably mounted between a pair of side plates 4 via a rotating shaft 51. The driving structure 53 includes a mechanism for driving the flip plate 52 to convert between a first state and a second state around the rotating shaft 51. When the flip plate 52 is in the first state (refer to FIG. Figure 11 As shown), the lower sides of the two flip plates 52 on both sides above the water spray pipe 6 are in contact with the outer wall of the water spray pipe 6 and are in an inverted eight-shaped shape, and the upper sides of the two flip plates 52 between the adjacent water spray pipes 6 are in contact with each other and are in a straight eight-shaped shape; when the flip plates 52 are in the second state, the plurality of flip plates 52 are in a vertical state (refer to Figure 9 shown).

[0053] During the breeding period, the flip plates 52 are driven by the driving structure 53 to rotate to the second state. At this time, several flip plates 52 are in a vertical state. During this period, the waste generated in the mobile cage 1 can be sunk to the seabed through the gap between the flip plates 52 and the water spray pipe 6. During the feeding period, the flip plates 52 are driven by the driving structure 53 to rotate to the first state. At this time, the lower sides of the two flip plates 52 on both sides of the water spray pipe 6 are in an inverted eight shape, and the two flip plates 52 between adjacent water spray pipes 6 are in an inverted eight shape. The upper sides of the plates 52 are in contact with each other and are in the shape of a right figure eight, that is, a V-shaped area is formed above the water spray pipe 6 by the flip plate 52. When the feed settles, it will gather in the V-shaped area of ​​the water spray pipe 6. At this time, the water spray hole 61 of the water spray pipe 6 will spray water, and the water will carry the feed upward, so that the feed enters the mobile cage 1 for the fish in the cage to eat, avoiding waste. In addition, this design can also make the seawater at the bottom of the mobile cage 1 flow fully, thereby increasing the oxygen content of the seawater at the bottom of the mobile cage 1 and avoiding hypoxia caused by too many fish at the bottom of the mobile cage 1.

[0054] Considering the installation environment of the driving structure 53, if a conventional electric driving element is used to drive the rotation of the flip plate 52, it is necessary to consider the sealing, corrosion resistance and layout of the circuit line. Figure 5-Figure 14As shown, in this embodiment, a U-shaped channel 43 is formed inside the side plate 4, and the U-shaped channel 43 includes an upper channel 431 and a lower channel 432 parallel to each other, and a connecting channel 433 provided between one end of the upper channel 431 and the lower channel 432;

[0055] The pair of side panels 4 are respectively a first side panel 41 and a second side panel 42. The connecting channels 433 in the first side panel 41 and the second side panel 42 are symmetrically arranged. The first side panel 41 and the second side panel 42 are both provided with a water inlet 433 that is connected to an end of the upper channel 431 away from the connecting channel 433.

[0056] The flip plates 52 on both sides of the water spray pipe 6 are respectively a first flip plate 521 and a second flip plate 522. The two ends of the rotating shaft 51 are respectively a passive end and an active end. The active end of the rotating shaft 51 of the first flip plate 521 extends to the upper channel 431 of the first side plate 41, where the driving structure 53 is installed. The active end of the rotating shaft 51 of the second flip plate 522 extends to the upper channel 431 of the second side plate 42, where the driving structure 53 is installed.

[0057] The driving structure 53 includes a swing plate 531 fixed to the active end 511 and adapted to the upper channel 431, and a preload spring 532 provided between the swing plate 531 and the top of the upper channel 431. When the flip plate 52 is in a first state, the preload spring 532 is compressed, the swing plate 531 is in a horizontal state, and a gap is formed between the swing plate 531 and the bottom side of the lower channel 432. When the flip plate 52 is in a second state, the preload spring 532 is in a normal state, the swing plate 531 is in an inclined state, and the lower side of the swing plate 531 contacts the bottom side of the lower channel 432.

[0058] The plurality of water spray pipes 6 include a plurality of first water spray pipes 62 and second water spray pipes 63 arranged at intervals, one end of the first water spray pipe 62 is connected to the lower channel 432 in the first side plate 41; one end of the second water spray pipe 63 is connected to the lower channel 432 in the second side plate 42.

[0059] Based on the above design, during feeding, seawater is injected into the water inlet 433 of the first side plate 41 and the second side plate 42. The seawater flows along the first channel and impacts the swing plate 531, causing the first flip plate 521 to rotate forward and the second flip plate 522 to rotate backward. This causes the first flip plate 521 and the second flip plate 522 to rotate to the second position, thereby forming a V-shaped area above the spray pipe 6. After the seawater flows into the connecting channel 433, it enters the second channel and is introduced into the first spray pipe 62 and the second spray pipe 63, and then is discharged from the spray hole 61, causing the seawater to carry the feed upward, thereby allowing the feed to enter the mobile cage 1 for consumption by the fish in the cage, thus avoiding waste. When the injection of seawater into the water inlet 433 stops, the first flip plate 521 and the second flip plate 522 will rotate to the first position under the action of the preload spring 532.

[0060] When seawater is injected into the water spray pipe 6 of the present invention, the seawater drives the rotation of the first flip plate 521 and the second flip plate 522, so that the first flip plate 521 and the second flip plate 522 rotate to the first shape on their own. When the injection of seawater into the water spray pipe 6 stops, the first flip plate 521 and the second flip plate 522 rotate to the second shape on their own. The driving structure 53 has a simple structure and stable operation.

[0061] In this embodiment, the water pump ballast system includes a water injection pump assembly for injecting water into the corresponding water inlet 433 .

[0062] The above description is only a preferred specific embodiment of the present invention, but the scope of protection of the present invention is not limited thereto. Any technician familiar with the technical field, within the technical scope disclosed by the present invention, who makes equivalent replacements or changes based on the technical solution and inventive concept of the present invention, should be covered by the scope of protection of the present invention.

Claims

1. A movable column-stabilized bottom-seated aquaculture cage, comprising a movable cage, feed processing equipment and an aquaculture management platform, characterized in that: The mobile net cage includes two pontoons, a net cage frame fixed between the tops of the two pontoons, and a net arranged on the inside of the net cage frame. The pontoons are separated into a central pump room and multiple side ballast water tanks by a partition. The central pump room is provided with a water pump ballast system for uniformly introducing or exporting seawater into or out of each side ballast water tank; each side ballast water tank is connected to a ventilation pipe, and the ventilation pipe extends to a position above the aquaculture management platform; the mobile net cage is provided with a set of air-blowing liquid level telemetry system for remotely measuring the liquid level of each side ballast water tank and the draft of the four corners of the mobile net cage; the aquaculture management platform is arranged on the top of the net cage frame; the feed processing equipment includes a feed feeding mechanism and an anti-sinking mechanism for preventing the feed from sinking to the bottom; A slag discharge space is formed between a pair of pontoons; the anti-sinking mechanism is installed in the slag discharge space and includes side plates symmetrically fixed to opposite sides of adjacent pontoons, and water spray pipes evenly arranged between the pair of side plates; wherein a flip plate assembly is provided on both sides above the water spray pipes, and water spray holes are evenly arranged on the upper half of the water spray pipes; The flip plate assembly includes a flip plate and a driving structure. The flip plate is rotatably installed between a pair of side plates via a rotating shaft. The driving structure includes a structure for driving the flip plate to convert between a first form and a second form around the rotating shaft. When the flip plate is in the first form, the lower sides of the two flip plates on both sides of the water pipe are in contact with the outer wall of the water pipe and are in an inverted eight shape, and the upper sides of the two flip plates between adjacent water pipes are in contact with each other and are in a straight eight shape; when the flip plate is in the second form, several flip plates are all in a vertical state.

2. The movable column-stabilized bottom-sitting aquaculture cage according to claim 1 is characterized in that: The cage frame includes a column structure and a strut structure. The column structure and the strut structure are combined to form a rectangular truss structure with an open top. The column structure includes several columns vertically fixed on the top of the pontoon. The strut structure includes three layers of horizontal struts arranged between adjacent columns, and connecting rods arranged between adjacent horizontal struts.

3. The movable column-stabilized bottom-sitting aquaculture cage according to claim 2 is characterized in that: The aquaculture management platform includes a main deck arranged on the top of the cage frame and a superstructure arranged on the main deck. A rest room, toilet, control room, engine room, fuel tank, battery room, fresh water tank and feed tank are arranged in the superstructure.

4. The movable column-stabilized bottom-sitting aquaculture cage according to claim 1 is characterized in that: There are two sets of feed feeding mechanisms, both of which are arranged on the main deck, and include a bulk silo, a feeder, an air source device, a feed pipeline and an electrical control cabinet.

5. The movable column-stabilized bottom-sitting aquaculture cage according to claim 1 is characterized in that: A U-shaped channel is formed inside the side plate, and the U-shaped channel includes an upper channel and a lower channel parallel to each other and a connecting channel provided between one end of the upper channel and the lower channel; A pair of side panels are respectively a first side panel and a second side panel, the connecting channels in the first side panel and the second side panel are symmetrically arranged, and the first side panel and the second side panel are both provided with a water inlet connected to an end of the upper channel away from the connecting channel; The flip plates on both sides of the water spray pipe are respectively a first flip plate and a second flip plate, and the two ends of the rotation axis of the first flip plate and the second flip plate are respectively a passive end and an active end. The active end of the rotation axis of the first flip plate extends to the upper channel of the first side plate, where the driving structure is installed. The active end of the rotation axis of the second flip plate extends to the upper channel of the second side plate, where the driving structure is installed. The driving structure includes a swing plate fixed to the active end and adapted to the upper channel, and a preload spring provided between the swing plate and the top of the upper channel. When the flip plate is in a first state, the preload spring is compressed, the swing plate is in a horizontal state, and a gap is formed between the swing plate and the bottom side of the lower channel. When the flip plate is in a second state, the preload spring is in a normal state, the swing plate is in an inclined state, and the lower side of the swing plate contacts the bottom side of the lower channel. The plurality of water spray pipes include a plurality of first water spray pipes and second water spray pipes arranged at intervals, one end of the first water spray pipe is connected to the lower channel in the first side plate; one end of the second water spray pipe is connected to the lower channel in the second side plate.

6. The movable column-stabilized bottom-sitting aquaculture cage according to claim 5 is characterized in that: The water pump ballast system includes a water injection pump assembly for injecting water into corresponding water inlets.

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