CN108482580B - Ballast system, floating dock and floating dock system - Google Patents
Ballast system, floating dock and floating dock system Download PDFInfo
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- CN108482580B CN108482580B CN201810504485.6A CN201810504485A CN108482580B CN 108482580 B CN108482580 B CN 108482580B CN 201810504485 A CN201810504485 A CN 201810504485A CN 108482580 B CN108482580 B CN 108482580B
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- B—PERFORMING OPERATIONS; TRANSPORTING
- B63—SHIPS OR OTHER WATERBORNE VESSELS; RELATED EQUIPMENT
- B63B—SHIPS OR OTHER WATERBORNE VESSELS; EQUIPMENT FOR SHIPPING
- B63B11/00—Interior subdivision of hulls
- B63B11/04—Constructional features of bunkers, e.g. structural fuel tanks, or ballast tanks, e.g. with elastic walls
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Abstract
The invention provides a ballast system, a floating dock and a floating dock system; wherein the ballast system is composed of a plurality of groups of ballast units; the ballast unit comprises a filling valve, a discharge valve, a variable frequency water pump and a suction inlet; the injection valve is arranged at the water injection port; the discharge valve is arranged at the water outlet; the variable frequency water pump is arranged between the injection valve and the discharge valve; the suction inlet is arranged in a ballast water tank of the floating dock; when the ship-moving barge operation is carried out, an external control station controls the opening of the filling valve or the discharging valve in the ballast unit corresponding to each ballast water tank, and sends corresponding variable frequency signals to the variable frequency water pumps in the ballast units corresponding to the ballast water tanks so as to control the flow of the variable frequency water pumps corresponding to the ballast water tanks, so that the floating dock is kept in a horizontal state in the ship-moving barge process. The invention can improve the flow control accuracy of the floating dock ballast system, so that the floating dock can realize the ship moving and barge-in and barge-out function as the underwater semi-submerged barge, and the function of the floating dock is expanded.
Description
Technical Field
The invention relates to the technical field of ballast systems, in particular to a ballast system, a floating dock and a floating dock system.
Background
The conventional floating dock ballast water system realizes the floating and sinking functions of the floating dock by injecting or discharging ballast water in a floating dock ballast water tank; when the floating dock is in sinking and floating operation, the water inlet/outlet flow in each ballast tank is adjusted according to the liquid level signal in the tank and the draft signal feedback of the floating dock, the adjusting precision is low, the control is not flexible enough, and the function of the floating dock is single.
Disclosure of Invention
In view of the above, the present invention provides a ballast system, a floating dock and a floating dock system, so as to improve the flow control accuracy of the ballast system of the floating dock, so that the floating dock can realize the function of transferring ships for semi-submerged barge to move ships.
In a first aspect, embodiments of the present invention provide a ballast system for use in a floating dock, the system comprising a plurality of sets of ballast units; the ballast unit corresponds to a ballast water tank of the floating dock; the ballast unit comprises a filling valve, a discharge valve, a variable frequency water pump and a suction inlet; the injection valve is arranged at the water injection port; the discharge valve is arranged at the water outlet; the variable frequency water pump is arranged between the injection valve and the discharge valve; the suction inlet is arranged in a ballast water tank of the floating dock; the filling valve, the discharge valve, the variable frequency water pump and the suction inlet are all arranged on the ballast pipeline; when the ship-moving barge operation is carried out, an external control station controls the opening of the filling valve or the discharging valve in the ballast unit corresponding to each ballast water tank, and sends corresponding variable frequency signals to the variable frequency water pumps in the ballast units corresponding to the ballast water tanks so as to control the flow of the variable frequency water pumps corresponding to the ballast water tanks, so that the floating dock is kept in a horizontal state in the ship-moving barge process.
With reference to the first aspect, embodiments of the present invention provide a first possible implementation manner of the first aspect, wherein the ballast unit further includes a flow meter; the flow meter is arranged on the ballast pipeline corresponding to each ballast water tank; the flowmeter is used for acquiring flow signals corresponding to the ballast water tank and sending the flow signals to an external control station; the flow signal comprises the inflow or outflow of water.
With reference to the first aspect, an embodiment of the present invention provides a second possible implementation manner of the first aspect, where the ballast unit further includes a frequency converter; the frequency converter is arranged between an external control station and the corresponding ballast water pump; the frequency converter is used for receiving a variable frequency signal sent by an external control station and adjusting the frequency of the ballast water pump according to the variable frequency signal.
With reference to the second possible implementation manner of the first aspect, an embodiment of the present invention provides a third possible implementation manner of the first aspect, where the frequency converters of one or more groups of ballast units are correspondingly provided with a filter, and the filter is configured to reduce harmonic interference of the frequency-converted signal.
With reference to the first aspect, an embodiment of the present invention provides a fourth possible implementation manner of the first aspect, where a filling valve, a discharge valve, and a variable frequency water pump in a ballast unit are disposed in a pump chamber; a pump outlet valve and a pump inlet valve are arranged at two ends of the ballast water pump; a communicating valve is arranged between ballast water pumps arranged in the same pump cabin; when one variable frequency water pump in the pump compartment breaks down, the communication valve is opened, so that the variable frequency water pumps except the broken down water pump control the flow of the broken down water pump corresponding to the ballast water compartment.
With reference to the first aspect, an embodiment of the present invention provides a fifth possible implementation manner of the first aspect, where when performing sinking and floating operations, the filling valve is opened, and water is filled into the ballast water tank by gravity; or opening a discharge valve, and discharging the water in the ballast water tank through a variable-frequency water pump in a variable-frequency or power-frequency working mode.
In a second aspect, embodiments of the present invention provide a floating dock comprising a ballast system as described above, and further comprising a ballast tank.
In combination with the second aspect, embodiments of the present invention provide a first possible implementation of the second aspect, wherein the floating dock comprises a plurality of groups of ballast tanks symmetrically distributed on the port side and the starboard side of the deck of the floating tank.
In a third aspect, embodiments of the present invention provide a floating dock system comprising a floating dock as described above, and further comprising a control station.
With reference to the third aspect, an embodiment of the present invention provides a first possible implementation manner of the third aspect, where the control station is configured to generate flow data of each ballast tank according to the size, the weight distribution, the barge-moving speed, and the tide level change rate of the barge ship, and generate a variable frequency signal of a variable frequency water pump corresponding to each ballast tank according to the flow data.
The embodiment of the invention has the following beneficial effects:
the embodiment of the invention provides a ballast system, a floating dock and a floating dock system, wherein the ballast system comprises a plurality of groups of ballast units, and the ballast units correspond to ballast water tanks of the floating dock; when the ship-moving barge operation is carried out, an external control station controls the opening of the filling valve or the discharging valve in the ballast unit corresponding to each ballast water tank, and sends corresponding variable frequency signals to the variable frequency water pumps in the ballast units corresponding to the ballast water tanks so as to control the flow of the variable frequency water pumps corresponding to the ballast water tanks, so that the floating dock is kept in a horizontal state in the ship-moving barge process. The method can improve the flow control accuracy of the floating dock ballast system, so that the floating dock can realize the ship moving and barge-in function as the underwater semi-submersible barge, and the function of the floating dock is expanded.
Additional features and advantages of the invention will be set forth in the description which follows, and in part will be obvious from the description, or may be learned by the practice of the invention as set forth above.
In order to make the aforementioned and other objects, features and advantages of the present invention comprehensible, preferred embodiments accompanied with figures are described in detail below.
Drawings
In order to more clearly illustrate the embodiments of the present invention or the technical solutions in the prior art, the drawings used in the description of the embodiments or the prior art will be briefly described below, and it is obvious that the drawings in the following description are some embodiments of the present invention, and other drawings can be obtained by those skilled in the art without creative efforts.
Fig. 1 is a schematic structural diagram of a ballast system according to an embodiment of the present invention;
fig. 2 is a schematic diagram of a floating dock performing a barge-in operation;
FIG. 3 is a schematic structural diagram of another ballast system provided in accordance with an embodiment of the present invention;
FIG. 4 is a schematic diagram illustrating variable frequency control of a ballast system according to an embodiment of the present invention;
FIG. 5 is a schematic structural view of another ballast system provided in accordance with an embodiment of the present invention;
FIG. 6 is a schematic structural view of another ballast system provided in accordance with an embodiment of the present invention;
FIG. 7 is a schematic illustration of a floating dock according to an embodiment of the present invention;
figure 8 is a schematic diagram of a floating dock system according to an embodiment of the present invention.
Detailed Description
To make the objects, technical solutions and advantages of the embodiments of the present invention clearer, the technical solutions of the present invention will be clearly and completely described below with reference to the accompanying drawings, and it is apparent that the described embodiments are some, but not all embodiments of the present invention. All other embodiments, which can be derived by a person skilled in the art from the embodiments given herein without making any creative effort, shall fall within the protection scope of the present invention.
The existing floating dock ballast system can only realize self-flow by gravity when filling water into the tank, and when moving a ship and refuting, in order to ensure that the whole floating dock keeps a horizontal state, one part of the ballast water tank needs to drain water to the outboard, and the other part possibly needs to fill water into the tank. If the water level in the cabin is higher than the external draft, the water cannot be continuously injected into the cabin by means of gravity. And the ballast water pump commonly used in the floating dock is a power frequency pump, and when the water quantity entering/exiting the ballast water tank needs to be adjusted, the adjustment precision is poor, the operation is difficult, the efficiency is low, and the energy is not saved. Based on this, the invention provides a ballast system, a floating dock and a floating dock system; the technology can be applied to the floating dock for sinking and floating operation and the barge moving operation, and can be realized by adopting related software or hardware, and the technology is described by the embodiment below.
Referring to FIG. 1, a schematic illustration of a ballast system is shown; the system includes a plurality of sets of ballast units; the ballast unit corresponds to a ballast water tank of the floating dock; in fig. 1, two ballast units are illustrated as an example, a ballast unit 10 and a ballast unit 11; each group of ballast units may correspond to one or more groups of ballast water tanks, and fig. 1 illustrates an example in which one group of ballast units corresponds to one group of ballast water tanks;
the ballast unit comprises a filling valve, a discharge valve, a variable frequency water pump and a suction inlet; in fig. 1, the ballast unit 10 includes a filling valve 101, a discharge valve 102, a variable frequency water pump 103, and a suction port 104; the ballast unit 11 includes a filling valve 111, a discharge valve 112, a variable frequency water pump 113, and a suction port 114; the injection valve is arranged at the water injection port; the discharge valve is arranged at the water outlet; the variable frequency water pump is arranged between the injection valve and the discharge valve; the suction inlet is arranged in a ballast water tank of the floating dock; the filling valve, the discharge valve, the variable frequency water pump and the suction inlet are all arranged on the ballast pipeline;
when the floating dock carries out ship-moving and barge-transferring operation, an external control station controls the opening of an injection valve or a discharge valve in a ballast unit corresponding to each ballast water tank, and sends a corresponding variable frequency signal to a variable frequency water pump in the ballast unit corresponding to each ballast water tank so as to control the flow of the variable frequency water pump corresponding to the ballast water tank, so that the floating dock is kept in a horizontal state in the ship-moving and barge-transferring process.
FIG. 2 is a schematic diagram of a floating dock performing barge-in operation, wherein it can be seen that the top of the floating dock needs to be kept horizontal to be as horizontal as possible with a wharf during barge-in operation; the floating dock close to the wharf is stressed by the pressure of the barge, and in order to keep the floating dock horizontal, the floating dock far away from the wharf needs to be filled with water through a ballast water tank, and the pressure of the barge is balanced through the gravity of the water; therefore, the ballast water tanks arranged in the floating dock need more and more water intake in the direction away from the quay.
Part of the control work of the control station can be realized by a computer through related program control, and can also be realized manually by related workers. The variable-frequency water pump of the ballast unit can control the flow of the water pump by adjusting the frequency of the water pump; the ballast water tank can be internally provided with a flowmeter for feeding back the flow of the ballast water tank in real time, thereby improving the control flow and the control precision of the ballast system.
The embodiment of the invention provides a ballast system, which comprises a plurality of groups of ballast units, wherein the ballast units correspond to ballast water tanks of a floating dock; when the ship-moving barge operation is carried out, an external control station controls the opening of the filling valve or the discharging valve in the ballast unit corresponding to each ballast water tank, and sends corresponding variable frequency signals to the variable frequency water pumps in the ballast units corresponding to the ballast water tanks so as to control the flow of the variable frequency water pumps corresponding to the ballast water tanks, so that the floating dock is kept in a horizontal state in the ship-moving barge process. The method can improve the flow control accuracy of the floating dock ballast system, so that the floating dock can realize the ship moving and barge-in function as the underwater semi-submersible barge, and the function of the floating dock is expanded.
Referring to FIG. 3, a schematic view of another ballast system is shown; the system is realized on the basis of FIG. 1; further, the ballast unit in the ballast system further comprises a flow meter, and the flow meter is arranged on the ballast pipeline corresponding to each ballast water tank; in fig. 3, the ballast unit 10 includes a flow meter 105; the ballast unit 11 includes a flow meter 115; the flowmeter is used for acquiring flow signals corresponding to the ballast water tank and sending the flow signals to the external control station; the flow signal comprises the inflow or outflow of water.
For example, a flow meter is provided in each branch of the ballast tank to monitor and feed back an instantaneous flow signal for each tank filling or discharging in real time. When the ship moves, the operation is carried out according to the liquid level in the tank and an external draft signal, the preset flow of the ballast pump can be calculated according to the pre-distribution load, the water quantity of the ballast tank can be adjusted, and the flow of the ballast pump can be controlled according to the feedback of the flow signal of each branch pipe in the operation process. Because the ballast tank has large volume, the water level in the tank and the external draft water level have certain fluctuation, and therefore, the measured values of the liquid level in the tank and the external draft have certain errors. The flowmeter has higher measurement precision and can feed back in real time, so the flowmeter has high control precision and more flexible operation and is more suitable for the operation requirement of the underwater semi-submersible barge.
The ballast unit in the ballast system also comprises a frequency converter, and the frequency converter is arranged between an external control station and a corresponding ballast water pump; the frequency converter is used for receiving a variable frequency signal sent by the external control station and adjusting the frequency of the ballast water pump according to the variable frequency signal; and the frequency converter of one group or multiunit ballast unit is provided with a wave filter correspondingly for reducing the harmonic interference of the frequency conversion signal.
A variable frequency control schematic of the ballast system as shown in fig. 4; each variable frequency water pump can be configured with a frequency converter, and the frequency converters cannot be arranged in a centralized manner due to the fact that the number of the variable frequency water pumps in the whole ballast system is large, the pump compartments are far away from each other, but the frequency converters are completely distributed and are not beneficial to operation and maintenance, so that the variable frequency control system of the ballast pump is designed in a distributed manner. The ballast pumps (i.e. the variable frequency water pumps) are grouped according to the arrangement positions of the ballast pumps, and the ballast pumps arranged in the same or adjacent ballast pump tanks are used as a group. Each ballast pump is provided with a frequency converter, and the frequency converters of each group of ballast pumps form a variable frequency control cabinet. Fig. 4 shows two frequency conversion control cabinets, namely a #1 frequency conversion control cabinet and a #2 frequency conversion control cabinet; each frequency conversion control cabinet is provided with a filter for reducing harmonic interference, wherein the filter is a #1 filter and a #2 filter. Each variable frequency control cabinet obtains a power supply from a main power grid, and is provided with an RS485 communication remote interface for variable frequency remote control of the ballast water pump with a control station in a control room.
Referring to FIG. 5, a schematic view of another ballast system is shown; the filling valve, the discharge valve and the variable frequency water pump in the ballast unit are arranged in the pump cabin; both ends of the ballast water pump are provided with a pump outlet valve and a pump inlet valve; a plurality of ballast units may be provided in one pump compartment, with communication valves provided between ballast pumps in the same pump compartment. When one variable frequency water pump in the pump compartment breaks down, the communication valve is opened, so that the variable frequency water pumps except the broken down water pump control the flow of the broken down water pump corresponding to the ballast water compartment.
For example, as in fig. 5, two ballast units are provided in the pump room (left), respectively having a No.1 ballast water pump and a No.2 ballast water pump; wherein, the NO.2 ballast water pump controls the flow of the NO.2 ballast water tank (left) and the NO.2 ballast water pump (middle left); the NO.1 ballast water pump controls the flow of the NO.1 ballast water tank (left) and the NO.1 ballast water pump (middle left); if the NO.2 ballast water pump has a fault, the communicating valve is opened, and the flow rates of the NO.2 ballast water tank (left) and the NO.2 ballast water pump (middle left) can be controlled through the NO.1 ballast water pump.
As shown in fig. 2, during the barge-in operation, the ship is gradually moved from the shore to the floating dock, in order to keep the floating dock horizontal, a part of the tanks need to be drained to the outboard, and a part of the tanks may need to be filled with water. The ballast water amount injected or discharged is different and is changed at any time for different ballast water tanks, and the calculation is carried out by a computer simulation correlation model according to the factors such as the size and weight distribution of the barge, the barge moving speed, the tide level change rate and the like. Because the capacity of the valve for adjusting the flow is limited, especially for a butterfly valve with a large caliber, the requirement cannot be met only by adjusting the valve under the condition of a large flow change range, the operation difficulty is large, and the control precision is low. And the operating point of the pump deviates from the rated working condition through valve adjustment, so that the efficiency of the pump is reduced. Therefore, the embodiment of the invention aims at the operation characteristics of the underwater semi-submersible barge, the variable frequency water pump is selected as the ballast pump, the control station generates flow data of each ballast water tank according to the size, weight distribution, ship moving speed and tide level change rate of the barge, generates variable frequency signals of the variable frequency water pump corresponding to each ballast water tank according to the flow data, and controls the flow of the ballast pump by adjusting the frequency of the pump. Through the regulation of frequency, the efficiency of pump not only can not receive the influence, and operating power can descend along with the frequency reduces by a wide margin moreover, plays energy-conserving effect to can reduce the operation cost.
When the ballast system is used for sinking and floating operation, the filling valve is opened, and water is filled into the ballast water tank through gravity; or opening a discharge valve, and discharging the water in the ballast water tank through a variable-frequency water pump in a variable-frequency or power-frequency working mode. FIG. 6 is a schematic view of an alternative ballast system; the ballast system has the function of making the floating dock perform sinking and floating operation; the ballast system comprises a special ballast drainage pump, a suction pipeline and valve accessories, a branch pipeline and valve accessories thereof, an in-tank suction inlet, a discharge pipeline and valve accessories thereof and the like. The ballast system can also be called a dry tank type ballast system, a plurality of pump tanks are arranged on the port and the starboard in a deck of the buoyancy tank, and a ballast water pump, a remote control valve and a suction port discharge main pipe are arranged in the pump tanks. The number of ballast pumps in each pump tank is determined based on the number of ballast tanks and the number of pump tanks. FIG. 5 illustrates a left pump bay as an example, with two ballast pumps per pump bay, each ballast pump controlling two ballast tanks; the ballast system of the starboard pump room and the ballast system of the port pump room are symmetrically arranged.
When the floating dock is in the ship-transferring operation, the ship-transferring top surface of the launching semi-submersible barge and the wharf top surface are kept on the same plane, and water in the ballast water tank is loaded through the ballast system. When the ship moves to barge, a part of cabins need to be drained to the outboard, a part of cabins may need to be filled with water, and the required flow rate is different according to different working conditions. When the ship moves to barge, the water level difference inside and outside the cabin is likely to be relatively close, and the effect of gravity water inflow can be influenced. If the water level in the cabin is higher than the external draft, the continuous injection into the cabin can not be realized. And the flow of gravity water inlet is difficult to control, so that the ballast system shown in fig. 6 cannot realize the function of diving and semi-diving.
When the floating dock sinks, the side filling valve and the branch pipe valve of each tank are opened, and external water automatically flows into the ballast tank by utilizing gravity because of the water level difference between the inside and the outside of the ballast tank; when the floating dock floats, the filling valve is closed, the discharge valve on the branch valve and the discharge main pipe is opened, the ballast pump is started, water in the ballast tank is discharged to the outboard through the ballast pump, and the ballast pump in the pump tank can have the function of mutual standby. If 1 ballast pump breaks down, the communication valve is opened, and the other 1 ballast pump is used for draining water. Conventional floating docks achieve the sinking or floating function of the floating dock by filling or draining ballast water in ballast tanks of the floating dock. When the floating dock sinks, gravity is generally used for automatically flowing water due to the difference of water levels inside and outside the ballast water tank. When the floating dock floats, the water in the ballast tank is discharged to the outboard through the ballast pump.
When the floating dock is in the upper floating working condition, all ballast pumps are opened simultaneously, discharge the ballast water in the cabin, therefore the ballast water pump shown in figure 6 chooses the power frequency water pump to satisfy the demands usually for use, and the water yield in different ballast water tanks can be adjusted through the valve on the branch pipe valve, however when the water yield in/out the ballast water tank needs to be adjusted, can only adjust through the branch pipe valve aperture, and the regulation precision is relatively poor, and difficult operation, and is inefficient, not energy-conserving.
The ballast system provided by the embodiment of the invention aims to enable the floating dock to realize the original functions of sinking and floating, and simultaneously can be used as a launching semi-submerged barge to realize the function of barge moving and barge loading. The ballast system is constructed in a schematic view in which the number of pump tanks and the arrangement of ballast pumps are identical to those of a conventional floating dock.
The ballast system provided by the embodiment of the invention can realize the function of injecting water into the cabin by power through the ballast water pump. The ballast pump adopts a variable frequency water pump, and the flow of the ballast pump is controlled by adjusting the frequency of the pump according to different working conditions when the ship moves. The floating dock can be used for sinking and floating operation of a conventional floating dock, and can also be used for transferring ships and barge up and down for launching semi-submersible barge. The flow meters are arranged on the branch pipes to each ballast tank, so that when the ship moves, the control is performed according to the liquid level in the tank and an external draft signal, the preset flow of the ballast pump can be calculated according to the pre-distribution load, the flow of the ballast pump can be controlled according to the flow signal feedback of each branch pipe in the operation process, the control precision is high, and the operation is more flexible.
When the floating dock sinks, the gravity water inlet mode can still be adopted. Opening the side filling valve, the pump inlet valve and the branch pipe valve of each tank, and automatically flowing external water into the ballast tank by gravity due to the water level difference between the inside and the outside of the ballast tank; when the floating dock floats, the branch valve, the pump inlet and the discharge valve on the discharge main pipe are opened, other valves are closed, the ballast pump is started, and water in the ballast tank is discharged to the outboard through the ballast pump. When the ship is moved to barge, the ballast tank which needs to be drained to the outside of the ship is drained to the outside of the ship through the ballast pump. For the ballast tank needing to be filled with water, the ballast pump is used for dynamically filling water, the filling valve, the pump outlet valve and each branch pipe valve are opened, other valves are closed, and the ballast pump is started at the same time. Therefore, the whole floating dock can be allocated outside the ballast water to keep a horizontal state, and the function of ship moving and barge loading is realized; the ballast pumps in the pump compartments may have a reciprocal back-up function. If one ballast pump fails, the communication valve is opened, and the other ballast pump is used for filling water or draining water.
As mentioned above, the invention not only realizes the sinking and floating functions of the floating dock, but also realizes the launching semi-submerged barge of the floating dock, and has obvious advantages. Has the following advantages:
(1) the ballast tank has the function of dynamic water injection into the ballast tank through the ballast water pump, the water injection flow is not limited by external draft and the difference between the water level inside and outside the tank, the function of regulating the water volume of ballast water can be realized under different conditions, and the operation requirement of the underwater semi-submerged barge is completely met.
(2) In order to meet the requirement of flow change of the launching semi-submersible barge, a variable frequency water pump is adopted, the flow of the pump can be controlled according to the adjusting frequency, and the flow is not controlled only by adjusting the opening of the valve. According to the change principle of the frequency and the power of the water pump, the frequency is reduced, and the power is greatly reduced, so that the purposes of saving energy, protecting environment and reducing the operation cost can be achieved through frequency conversion regulation. The frequency converters arranged in a partitioned and grouped manner have the characteristic of dispersion and concentration, and are relatively designed in a completely concentrated manner, so that the size of equipment is reduced, and the arrangement is more flexible; compared with a completely dispersed design, the number of switches on the primary side of the power grid is reduced, the arrangement space is saved, and the investment cost is reduced.
(3) The flow meter arranged on the branch pipe is used for measuring the flow rate of the water entering/exiting the cabin, and the water level in the cabin and the flow rate of the ballast pump are controlled according to flow signals, so that the measurement precision is higher, and the control is more flexible.
Embodiments of the present invention also provide a floating dock, as shown in figure 7, comprising a ballast system 70 as described above and a ballast tank 71. The floating dock comprises a plurality of groups of water ballast tanks, wherein the groups of water ballast tanks are symmetrically distributed on the port side and the starboard side of a deck of the floating box.
The floating dock provided by the embodiment of the invention has the same technical characteristics as the ballast system provided by the embodiment, so that the same technical problems can be solved, and the same technical effects can be achieved.
Embodiments of the present invention also provide a floating dock system, as shown in figure 8, that includes a floating dock 80 and a control station 81. The control station is used for generating flow data of each ballast water tank according to the size, weight distribution, ship moving speed and tide level change rate of the ship to be docked, and generating variable frequency signals of variable frequency water pumps corresponding to the ballast water tanks according to the flow data.
The floating dock system provided by the embodiment of the invention has the same technical characteristics as the ballast system and the floating dock provided by the embodiment, so that the same technical problems can be solved, and the same technical effects can be achieved.
The ballast system, the floating dock and the floating dock system provided by the embodiment of the invention are combined with the operation characteristics of the conventional floating dock and the launching semi-submersible barge, so that the operation function of the conventional floating dock can be realized, and meanwhile, the system can also be used as the launching semi-submersible barge to realize the operation function of ship transfer and the loading and unloading barge.
In addition, in the description of the embodiments of the present invention, unless otherwise explicitly specified or limited, the terms "mounted," "connected," and "connected" are to be construed broadly, e.g., as meaning either a fixed connection, a removable connection, or an integral connection; can be mechanically or electrically connected; they may be connected directly or indirectly through intervening media, or they may be interconnected between two elements. The specific meanings of the above terms in the present invention can be understood in specific cases to those skilled in the art.
In the description of the present invention, it should be noted that the terms "center", "upper", "lower", "left", "right", "vertical", "horizontal", "inner", "outer", etc., indicate orientations or positional relationships based on the orientations or positional relationships shown in the drawings, and are only for convenience of description and simplicity of description, but do not indicate or imply that the device or element being referred to must have a particular orientation, be constructed and operated in a particular orientation, and thus, should not be construed as limiting the present invention. Furthermore, the terms "first," "second," and "third" are used for descriptive purposes only and are not to be construed as indicating or implying relative importance.
Finally, it should be noted that: the above-mentioned embodiments are only specific embodiments of the present invention, which are used for illustrating the technical solutions of the present invention and not for limiting the same, and the protection scope of the present invention is not limited thereto, although the present invention is described in detail with reference to the foregoing embodiments, those skilled in the art should understand that: any person skilled in the art can modify or easily conceive the technical solutions described in the foregoing embodiments or equivalent substitutes for some technical features within the technical scope of the present disclosure; such modifications, changes or substitutions do not depart from the spirit and scope of the embodiments of the present invention, and they should be construed as being included therein. Therefore, the protection scope of the present invention shall be subject to the protection scope of the claims.
Claims (9)
1. A ballast system for use in a floating dock, the system comprising a plurality of groups of ballast units; the ballast unit corresponds to a ballast water tank of the floating dock; the ballast unit comprises a filling valve, a discharge valve, a variable frequency water pump and a suction inlet;
the injection valve is arranged at the water injection port; the discharge valve is arranged at the water outlet; the variable-frequency water pump is arranged between the injection valve and the discharge valve; the suction inlet is arranged in a ballast water tank of the floating dock; the filling valve, the discharge valve, the variable frequency water pump and the suction inlet are all arranged on a ballast pipeline;
the ballast unit further comprises a flow meter; the flow meter is arranged on the ballast pipeline corresponding to each ballast water tank; the flowmeter is used for acquiring flow signals corresponding to the ballast water tank and sending the flow signals to an external control station; the flow signal comprises inflow or outflow;
when carrying out ship-moving barge operation, an external control station controls the opening of an injection valve or a discharge valve in a ballast unit corresponding to each ballast water tank, and sends a corresponding variable frequency signal to a variable frequency water pump in the ballast unit corresponding to each ballast water tank so as to control the flow of the variable frequency water pump corresponding to the ballast water tank, so that the floating dock is kept in a horizontal state in the ship-moving barge process; the control station calculates the preset flow of the variable-frequency water pump according to the pre-distribution load, adjusts the water quantity of the ballast water tank, and controls the flow of the variable-frequency water pump according to the flow signal feedback of each branch pipe in the operation process.
2. The ballast system of claim 1, wherein said ballast unit further comprises a frequency converter; the frequency converter is arranged between the external control station and the corresponding ballast water pump; the frequency converter is used for receiving a frequency conversion signal sent by the external control station and adjusting the frequency of the ballast water pump according to the frequency conversion signal.
3. The ballast system of claim 2, wherein the frequency converters of one or more groups of ballast units are provided with a filter for reducing harmonic interference of the frequency converted signal.
4. The ballast system of claim 1, wherein the fill valve, the discharge valve, and the variable frequency water pump in the ballast unit are disposed in a pump bay; a pump outlet valve and a pump inlet valve are arranged at two ends of the ballast water pump; a communicating valve is arranged between ballast water pumps arranged in the same pump cabin; when one variable frequency water pump in the pump compartment breaks down, the communication valve is opened, so that the variable frequency water pumps except the broken down water pump control the flow of the broken down water pump corresponding to the ballast water compartment.
5. The ballast system of claim 1, wherein when the ballast water tank is submerged, the filling valve is opened to fill the ballast water tank by gravity; or the discharge valve is opened, and the water in the ballast water tank is discharged through the variable-frequency water pump in a variable-frequency or power-frequency working mode.
6. A floating dock, characterized in that the floating dock comprises a ballast system according to any one of claims 1 to 5, further comprising a ballast water tank.
7. A floating dock according to claim 6 wherein the floating dock comprises a plurality of said ballast tanks symmetrically distributed port and starboard of a pontoon deck.
8. A floating dock system, comprising a floating dock according to claim 6 or 7, and further comprising a control station.
9. The floating dock system of claim 8, wherein the control station is configured to generate flow data for each ballast tank based on the size, weight distribution, barge-in speed and tidal level change rate of the barge-in vessel, and to generate variable frequency signals for variable frequency pumps corresponding to each ballast tank based on the flow data.
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| CN109110050A (en) * | 2018-09-12 | 2019-01-01 | 宜昌东江造船有限公司 | Semi-submersible type loads and unloads ship |
| CN109403365B (en) * | 2018-12-21 | 2022-07-22 | 中交一航局第二工程有限公司 | Safe outgoing system and process for unmanned caisson |
| CN111824328B (en) * | 2020-07-23 | 2022-06-14 | 广船国际有限公司 | Method for preventing overflow of ship ballast water |
| CN113148065A (en) * | 2021-04-29 | 2021-07-23 | 江苏扬子三井造船有限公司 | Method for launching ship by using floating dock |
| CN115042930B (en) * | 2022-06-13 | 2024-02-20 | 武汉理工大学 | Ballast water tank and floating dock |
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| DE102011050857A1 (en) * | 2011-06-06 | 2012-12-06 | Hoppe Bordmesstechnik Gmbh | Method and device for compensating a load torque and method and measuring equipment for determining the position of a load |
| CN202541800U (en) * | 2012-04-06 | 2012-11-21 | 扬帆集团股份有限公司 | Automatic transverse inclination preventing system using ballast pumps |
| CN204009487U (en) * | 2014-04-30 | 2014-12-10 | 中国人民解放军总后勤部军事交通运输研究所 | Floating drydock heave automatic control system |
| CN107972829A (en) * | 2016-10-22 | 2018-05-01 | 姚宏威 | A kind of attitude of ship regulating system |
| CN206552223U (en) * | 2017-03-16 | 2017-10-13 | 大连理工大学 | A kind of Large Offshore Structures carry the adaptive ballasting system of condition |
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