CN114475951A - Towing buoyancy tank ballast water system and control method thereof - Google Patents
Towing buoyancy tank ballast water system and control method thereof Download PDFInfo
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- CN114475951A CN114475951A CN202210270749.2A CN202210270749A CN114475951A CN 114475951 A CN114475951 A CN 114475951A CN 202210270749 A CN202210270749 A CN 202210270749A CN 114475951 A CN114475951 A CN 114475951A
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- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Substances O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 title claims abstract description 91
- 238000000034 method Methods 0.000 title claims abstract description 15
- 238000001914 filtration Methods 0.000 claims abstract description 61
- 239000007788 liquid Substances 0.000 claims description 91
- 238000012546 transfer Methods 0.000 claims description 29
- 238000004891 communication Methods 0.000 claims description 26
- 239000013535 sea water Substances 0.000 claims description 14
- 238000005086 pumping Methods 0.000 claims description 13
- 238000007599 discharging Methods 0.000 claims description 8
- 238000001514 detection method Methods 0.000 claims description 6
- 230000001105 regulatory effect Effects 0.000 claims description 4
- 230000009977 dual effect Effects 0.000 claims 2
- 230000005484 gravity Effects 0.000 abstract description 8
- 238000007667 floating Methods 0.000 abstract description 7
- 238000012544 monitoring process Methods 0.000 description 6
- 230000001276 controlling effect Effects 0.000 description 3
- 238000010276 construction Methods 0.000 description 2
- 238000010586 diagram Methods 0.000 description 2
- 239000000463 material Substances 0.000 description 2
- 230000009286 beneficial effect Effects 0.000 description 1
- 230000000903 blocking effect Effects 0.000 description 1
- 230000000694 effects Effects 0.000 description 1
- 238000009499 grossing Methods 0.000 description 1
- 239000012535 impurity Substances 0.000 description 1
- 238000007689 inspection Methods 0.000 description 1
- 238000009434 installation Methods 0.000 description 1
- 244000005700 microbiome Species 0.000 description 1
- 238000012545 processing Methods 0.000 description 1
- 230000000630 rising effect Effects 0.000 description 1
- 239000007921 spray Substances 0.000 description 1
- 239000004575 stone Substances 0.000 description 1
- 238000012360 testing method Methods 0.000 description 1
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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
- B63B39/00—Equipment to decrease pitch, roll, or like unwanted vessel movements; Apparatus for indicating vessel attitude
- B63B39/02—Equipment to decrease pitch, roll, or like unwanted vessel movements; Apparatus for indicating vessel attitude to decrease vessel movements by displacement of masses
- B63B39/03—Equipment to decrease pitch, roll, or like unwanted vessel movements; Apparatus for indicating vessel attitude to decrease vessel movements by displacement of masses by transferring liquids
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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
- B63B43/00—Improving safety of vessels, e.g. damage control, not otherwise provided for
- B63B43/02—Improving safety of vessels, e.g. damage control, not otherwise provided for reducing risk of capsizing or sinking
- B63B43/04—Improving safety of vessels, e.g. damage control, not otherwise provided for reducing risk of capsizing or sinking by improving stability
- B63B43/06—Improving safety of vessels, e.g. damage control, not otherwise provided for reducing risk of capsizing or sinking by improving stability using ballast tanks
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- B—PERFORMING OPERATIONS; TRANSPORTING
- B63—SHIPS OR OTHER WATERBORNE VESSELS; RELATED EQUIPMENT
- B63J—AUXILIARIES ON VESSELS
- B63J4/00—Arrangements of installations for treating ballast water, waste water, sewage, sludge, or refuse, or for preventing environmental pollution not otherwise provided for
- B63J4/002—Arrangements of installations for treating ballast water, waste water, sewage, sludge, or refuse, or for preventing environmental pollution not otherwise provided for for treating ballast water
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- Chemical & Material Sciences (AREA)
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- Ocean & Marine Engineering (AREA)
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- Environmental & Geological Engineering (AREA)
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- Filtration Of Liquid (AREA)
Abstract
The invention discloses a towing buoyancy tank ballast water system and a control method thereof, wherein the towing buoyancy tank ballast water system comprises a first filtering unit, a first double-acting pump, a ballast conveying unit, a second filtering unit, a second double-acting pump, a load discharge conveying unit and a ballast unit; the first filtering unit is communicated with a first port of a first double-acting pump, a second port of the first double-acting pump is communicated with a ballast conveying unit, and the ballast conveying unit is communicated with a ballast unit; the second filter unit is communicated with a first port of a second double-acting pump, and a second port of the second double-acting pump is communicated with the ballast conveying unit; the third port of the first double-acting pump is communicated with the third port of the second double-acting pump; one end of the discharge conveying unit is communicated with the ballast unit; the application aims to provide a towing buoyancy tank ballast water system and a control method thereof, ballast water is sucked and discharged in time according to operation needs and on-site working conditions, and the system is used for adjusting the gravity center position, the floating state and the stability of the system.
Description
Technical Field
The invention relates to the field of offshore operation equipment, in particular to a towing buoyancy tank ballast water system and a control method thereof.
Background
Offshore construction structures (such as small self-elevating platforms, floating fans, lifting net cages and the like) need to work to specified points through towing, so that floating body devices are often required to be added outside the offshore construction structures, buoyancy is further provided, and towing operation is facilitated. The towing buoyancy tank usually adopts a ballast water system to adjust buoyancy, so that stability in towing is kept. However, the existing ballast water system still has many problems, such as low control precision of ballast water buoyancy, slow regulation speed of ballast water, easy blockage of ballast water piping, large pollution of ballast system and the like, and the towing cost is high and the towing time is long due to frequent need of ship stopping for inspection during towing.
Disclosure of Invention
The invention aims to provide a towing buoyancy tank ballast water system and a control method thereof, which can suck and discharge ballast water in time according to operation needs and on-site working conditions and are used for adjusting the gravity center position, the floating state and the stability of the system.
In order to achieve the purpose, the invention adopts the following technical scheme: a towing buoyancy tank ballast water system comprises a first filtering unit, a first double-acting pump, a ballast conveying unit, a second filtering unit, a second double-acting pump, a discharge conveying unit and a ballast unit;
the first filtration unit and/or the second filtration unit is in communication with a first port of the first double acting pump, a second port of the first double acting pump is in communication with the ballast transfer unit, and the ballast transfer unit is in communication with the ballast unit; the first double-acting pump is used for communicating the first filtering unit and/or the second filtering unit and pumping seawater into the ballast unit through the ballast conveying unit;
the first filtration unit and/or the second filtration unit is in communication with a first port of the second dual-acting pump, a second port of the second dual-acting pump being in communication with the ballast transfer unit; the third port of the first dual-acting pump is in communication with the third port of the second dual-acting pump; the second double-acting pump is used for communicating the first filtering unit and/or the second filtering unit and pumping seawater into the ballast unit through the ballast conveying unit;
one end of the unloading and conveying unit is communicated with the ballast unit, and the other end of the unloading and conveying unit is communicated with the first filtering unit and/or the second filtering unit; the unloading conveying unit is used for communicating the first filtering unit and/or the second filtering unit and pumping ballast water out of the ballast unit.
Preferably, the ballast system further comprises a first butterfly valve, a second butterfly valve, a third butterfly valve and a fourth butterfly valve, the first butterfly valve being disposed between the second port of the first double acting pump and the ballast transfer unit, the third butterfly valve being disposed at the third port of the first double acting pump; the second butterfly valve is disposed between the second port of the second dual-purpose pump and the ballast transfer unit, and the fourth butterfly valve is disposed at the third port of the second dual-purpose pump.
Preferably, the ballast conveying unit comprises a first electrically-controlled check valve and a first throttle valve, an input end of the first electrically-controlled check valve is communicated with the second port of the first double-acting pump, an output end of the first electrically-controlled check valve is communicated with an input end of the first throttle valve, and an output end of the first throttle valve is communicated with an input end of the ballast unit; the first electrically controlled one-way valve is transported in a direction from the first double acting pump towards the ballast unit.
Preferably, the ballast conveying unit further comprises a first overflow valve, an input end of the first overflow valve is communicated with the ballast unit, and an output end of the first overflow valve is communicated with the first filtering unit and/or the second filtering unit.
Preferably, the ballast unit further comprises a pressure sensor and a liquid level sensor, and the detection end of the pressure sensor is arranged in the ballast unit; the detection end of the liquid level sensor is arranged in the ballast unit.
Preferably, the unloading and conveying unit comprises a fifth butterfly valve, a fifth throttling valve and a fifth electric control one-way valve, the input end of the fifth butterfly valve is communicated with the output end of the ballast unit, the output end of the fifth butterfly valve is communicated with the input end of the fifth throttling valve, the output end of the fifth throttling valve is communicated with the input end of the fifth electric control one-way valve, and the output end of the fifth electric control one-way valve is communicated with the first filtering unit and/or the second filtering unit.
Preferably, the load relief conveying unit further comprises a fifth overflow valve, an input end of the fifth overflow valve is communicated with an output end of the fifth electronic control one-way valve, and an output end of the fifth overflow valve is communicated with the first filtering unit and/or the second filtering unit.
Preferably, first filter unit includes the valve body, prevents stifled cover and filter screen, be provided with the passageway in the valve body, the filter screen sets up the middle part of passageway, prevent stifled cover setting and be in the one end of passageway, the other end of passageway with the first port intercommunication of first double-acting pump.
Preferably, the ballast conveying unit, the ballast unit and the discharge conveying unit are provided with multiple groups.
A control method of a towing buoyancy tank ballast water system comprises the following steps:
setting a liquid level upper limit value and a liquid level lower limit value of a ballast unit on an upper computer;
starting the first double-acting pump and the second double-acting pump, detecting the liquid level height in the ballast unit in real time through a liquid level sensor, and acquiring and recording the current liquid level height hn, wherein n is 1, 2, 3 … n, and n is the number of the ballast units; after ballast water is sucked for the first time, a liquid level sensor collects and records a new liquid level height set Hn, wherein n is 1, 2, 3 … n, and n is the number of ballast units; comparing the new liquid level height set Hn with the relationship between the upper liquid level limit value and the lower liquid level limit value by adopting a differential method;
when the new liquid level height set Hn is smaller than the liquid level lower limit value, opening the electronic control one-way valve in the ballast conveying unit, closing the electronic control one-way valve in the ballast discharging conveying unit, and adjusting the flow of ballast water through the throttle valve to increase the liquid level of one or more ballast units to the interval between the liquid level upper limit value and the liquid level lower limit value;
when the new liquid level height set Hn is larger than the upper limit value of the liquid level, closing the electric control one-way valves in the ballast conveying units, opening the electric control one-way valves in the ballast discharging conveying units, and regulating the flow of ballast water through the throttle valve to reduce the liquid level of one or more ballast units to the interval between the upper limit value of the liquid level and the lower limit value of the liquid level;
when the new liquid level height set Hn is in the interval of the upper limit value and the lower limit value of the liquid level, all the electric control one-way valves in the ballast conveying unit and the discharge conveying unit are opened, the first butterfly valve and the fourth butterfly valve are opened, the second butterfly valve and the third butterfly valve are closed, the system is in a state of sucking seawater and discharging ballast water, the pressure sensor detects the pressure of the ballast unit, and the relation between the new liquid level height set Hn and the upper limit value and the lower limit value of the liquid level is judged.
The technical scheme of the invention has the beneficial effects that: the ballast conveying unit, the ballast discharge conveying unit and the ballast unit are matched, ballast water can be sucked and discharged in time according to operation requirements and on-site working conditions, the gravity center position, the floating state and the stability of the ship can be adjusted, and the problems that the stability is insufficient or draft is inappropriate due to different sea water densities and rising of the gravity center in the sailing process of the ship can be solved.
Drawings
FIG. 1 is a schematic structural diagram of one embodiment of the present invention;
FIG. 2 is a schematic perspective view of a first filter unit according to an embodiment of the present invention;
FIG. 3 is a schematic side view of a first filter unit according to one embodiment of the present invention;
fig. 4 is a schematic diagram of a control process according to an embodiment of the present invention.
Wherein: the filter comprises a first filter unit 1, a valve body 11, an anti-blocking cover 12, a filter screen 13, a first double-acting pump 2, a ballast conveying unit 3, a first electric control one-way valve 31, a first throttle valve 32, a first overflow valve 33, a second filter unit 4, a second double-acting pump 5, a load discharge conveying unit 6, a fifth butterfly valve 61, a fifth throttle valve 62, a fifth electric control one-way valve 63, a fifth overflow valve 64, a ballast unit 7, a pressure sensor 71, a liquid level sensor 72, a first butterfly valve 8, a second butterfly valve 9, a third butterfly valve 10 and a fourth butterfly valve 11.
Detailed Description
The technical scheme of the invention is further explained by the specific implementation mode in combination with the attached drawings.
Reference will now be made in detail to embodiments of the present invention, examples of which are illustrated in the accompanying drawings, wherein like or similar reference numerals refer to the same or similar elements or elements having the same or similar function throughout. The embodiments described below with reference to the accompanying drawings are illustrative only for the purpose of explaining the present invention, and are not to be construed as limiting the present invention.
In the description of the present invention, "a plurality" means two or more unless otherwise specified.
In the description of the present invention, it should be noted that, 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.
Referring to fig. 1 to 4, a towing buoyancy tank ballast water system includes a first filter unit 1, a first double-acting pump 2, a ballast transfer unit 3, a second filter unit 4, a second double-acting pump 5, a discharge transfer unit 6, and a ballast unit 7; the first filtration unit 1 and/or the second filtration unit 4 are in communication with a first port of the first double acting pump 2, a second port of the first double acting pump 2 is in communication with the ballast transfer unit 3, and the ballast transfer unit 3 is in communication with the ballast unit 7; the first double-acting pump 2 is used for communicating the first filtering unit 1 and/or the second filtering unit 4 and pumping seawater into the ballast unit 7 through the ballast conveying unit 3;
the first filtration unit 1 and/or the second filtration unit 4 are in communication with a first port of the second double acting pump 5, a second port of the second double acting pump 5 being in communication with the ballast transfer unit 3; the third port of the first double-acting pump 2 is communicated with the third port of the second double-acting pump 5; the second double-acting pump 5 is used for communicating the first filtering unit 1 and/or the second filtering unit 4 and pumping seawater into the ballast unit 7 through the ballast conveying unit 3;
one end of the discharge conveying unit 6 is communicated with the ballast unit 7, and the other end of the discharge conveying unit 6 is communicated with the first filtering unit 1 and/or the second filtering unit 4; the unloading conveying unit 6 is used for communicating the first filtering unit 1 and/or the second filtering unit 4 and pumping ballast water out of the ballast unit 7.
By adopting the structure, the first filtering unit 1, the second filtering unit 4, the first double-acting pump 2 and the ballast conveying unit 3 are matched to form a ballast conveying line, seawater is sucked into the ballast unit 7, the liquid level height in the ballast unit 7 is increased, the gravity center of the ballast unit 7 is lowered, and the stability of the ballast unit 7 is improved. After the net cage and ballast unit 7 combination is towed to a predetermined deep sea area, the net cage lifting system is started, and the pile legs are lowered to the seabed. The cage and ballast unit 7 combination body is upward along the spud leg, and the ballast water in the buoyancy tank is the required value for calculation: buoyancy tank dead weight, net cage dead weight, ballast water, buoyancy of the buoyancy tank and net cage buoyancy; inputting the calculated required value into an upper computer, starting an electric control one-way valve of the ballast conveying unit 3, closing an electric control one-way valve of the discharge conveying unit 6, pumping the ballast water by a double-acting electric water pump, adjusting the water level value of each ballast tank according to the measured data, reaching the set value of the upper computer, pressing the pile for about 8 hours, unlocking the ballast unit and the net cage after no obvious settlement, and finishing the operation.
First filter unit 1, second filter unit 4, second double-acting pump 5 and let out and carry 6 cooperations of conveyor unit and form and let out and carry the transfer chain, discharge ballast water from ballast unit 7 in, reduce liquid level height in the ballast unit 7, raise ballast unit 7's focus, make things convenient for ballast unit 7 to tow boat. The top of the net box is adjusted to be horizontal to the ballast unit, the connecting and fixing mechanism is locked, the cable is bound and fixed, and at the moment, ballast water is filled in the ballast unit. And locking the cage lifting system, starting the two double-acting electric pumps for draining water, closing the first butterfly valve and the fourth butterfly valve, opening the electric control one-way valve of the relief conveying unit 6, emptying ballast water in the buoyancy tank, and lifting the four pile legs by buoyancy of the buoyancy tank to drag the four pile legs away from the seabed. And starting the lifting system again, and lifting the pile leg to the highest limit position to stop.
During towing, there are several states:
state 1 (towing operation):
the buoyancy tank is arranged at the lower part of the net cage, the gravity center of the net cage is H1 above the water surface, the draft is X1, the gravity center height required by towing is Y, namely the gravity center distance of H1-Y needs to be reduced, because the connecting body of the net cage and the buoyancy tank is a rigid body, the draft needs to be changed into X1+ H1-Y, and the buoyancy value needing to be changed, namely the volume of ballast water, can be calculated. Thereby converting the liquid level height of each ballast tank into the liquid level height of each ballast tank, and setting the liquid level height on the upper computer according to errors. And (3) opening an electric control one-way valve of the ballast conveying unit 3, closing an electric control one-way valve of the discharge conveying unit 6, pumping the ballast water by using a double-acting electric water pump, and adjusting the water level value of each ballast tank according to the measured data.
State 2 (pile driving operation):
firstly, a net cage lifting system is started, and a pile leg is put down to the seabed. The cage and ballast unit 7 combination body is upward along the spud leg, and the ballast water in the buoyancy tank is the required value for calculation: the buoyancy of the buoyancy tank, the dead weight of the net cage, the ballast water, the buoyancy of the buoyancy tank and the buoyancy of the net cage are more than 0, namely the ballast water is more than (buoyancy of the buoyancy tank, buoyancy of the net cage) - (dead weight of the buoyancy tank and dead weight of the net cage); at this time, it should be noted that the ballast water should not be excessively large in order to prevent the occurrence of a puncture accident. Inputting the calculated required value into an upper computer, starting an electric control one-way valve of the ballast conveying unit 3, closing an electric control one-way valve of the discharge conveying unit 6, pumping the ballast water by a double-acting electric water pump, adjusting the water level value of each ballast tank according to the measured data, reaching the set value of the upper computer, pressing the pile for about 8 hours, unlocking the ballast unit and the net cage after no obvious settlement, and finishing the operation.
State 3 (pile pulling operation):
the top of the net cage is adjusted to be horizontal to the buoyancy tank, the net cage is locked by a connecting and fixing mechanism, the cable is bound and fixed, and ballast water is filled in the buoyancy tank at the moment. And locking the cage lifting system, emptying ballast water in the buoyancy tank, and lifting the four pile legs by buoyancy of the buoyancy tank to be dragged away from the seabed. And starting the lifting system again, and lifting the pile leg to the highest limit position to stop.
Preferably, the system further comprises a first butterfly valve 8, a second butterfly valve 9, a third butterfly valve 10 and a fourth butterfly valve 11, wherein the first butterfly valve 8 is arranged between the second port of the first double-acting pump 2 and the ballast delivery unit 3, and the third butterfly valve 10 is arranged at the third port of the first double-acting pump 2; the second butterfly valve 9 is disposed between the second port of the second double acting pump 5 and the ballast transfer unit 3, and the fourth butterfly valve 11 is disposed at the third port of the second double acting pump 5.
Since the first double-acting pump 2 or the second double-acting pump 5 cannot be in idle rotation, the stability of the pipeline is ensured by opening or closing the first butterfly valve 8, the second butterfly valve 9, the third butterfly valve 10 and the fourth butterfly valve 11. The ballast water system employs a double-acting electric pump which can be used both for pumping water and for draining water. By controlling the opening or closing of the first to fourth butterfly valves, the functions of simultaneous ballasting, simultaneous unloading or ballast water replacement and the like are realized. The alternative use cooperates with the filtering unit, can realize the non-blocking of ballast and discharge piping system, and when improving the service life of pump, improve the efficiency of ballast water, guarantee ballast water system's security.
In particular, the ballast transfer unit 3 comprises a first electronically controlled one-way valve 31 and a first throttle valve 32, the input of the first electronically controlled one-way valve 31 communicating with the second port of the first double-acting pump 2, the output of the first electronically controlled one-way valve 31 communicating with the input of the first throttle valve 32, the output of the first throttle valve 32 communicating with the input of the ballast unit 7; the first electronically controlled one-way valve 31 is directed in the conveying direction from the first double acting pump 2 towards the ballast unit 7.
Meanwhile, the ballast conveying unit 3 further comprises a first overflow valve 33, an input end of the first overflow valve 33 is communicated with the ballast unit 7, and an output end of the first overflow valve 33 is communicated with the first filtering unit 1 and/or the second filtering unit 4.
A first electronically controlled one-way valve 31 in the ballast transfer unit 3 cooperates with a first throttle valve 32 for controlling the water entering the ballast unit 7. The opening or closing of the ballast transfer unit 3 is realized by opening or closing the first electrically-controlled check valve 31, when the ballast transfer unit 3 is opened, the first filter unit 1 or the second filter unit 4 is communicated with ballast water of the ballast unit 7, and the first double-acting pump 2 and the second double-acting pump 5 work to suck seawater into the ballast unit 7 from outside. The first relief valve 33 is provided in the circuit of the ballast transfer unit 3 to generate back pressure, thereby smoothing the ballast operation, reducing the impact, and improving the stability of the ballast water system of the buoyancy tank.
Preferably, the ballast unit 7 further comprises a pressure sensor 71 and a liquid level sensor 72, wherein a detection end of the pressure sensor 71 is arranged in the ballast unit 7; the detection end of the level sensor 72 is disposed within the ballast unit 7.
The liquid level measured by the liquid level sensor 72 is sent to a computer by a communication protocol through a communication module, and the computer performs analysis processing according to the set liquid level. Before the system operates, parameter setting is carried out on an upper computer control panel, the set liquid level has an upper limit value and a lower limit value, when the system starts to operate and the liquid level measured by the liquid level sensor 72 is higher than the upper limit value, a computer sends an instruction to close the electric control one-way valve of the ballast conveying unit 3 and open the electric control one-way valve of the unloading conveying unit 6; when the measured liquid level is lower than the lower limit value, the computer sends an instruction to open the electric control one-way valve of the ballast conveying unit 3 and close the electric control one-way valve of the unloading conveying unit 6; when the measured liquid level is between the lower limit value and the upper limit value, the computer sends an instruction to simultaneously open the first butterfly valve 8 and the fourth butterfly valve 11, close the second butterfly valve 9 and the third butterfly valve 10, open all the electric control one-way valves, simultaneously suck seawater and discharge ballast water, and the replacement effect of the ballast water is realized.
Specifically, the unloading and conveying unit 6 comprises a fifth butterfly valve 61, a fifth throttle valve 62 and a fifth electronically controlled check valve 63, wherein an input end of the fifth butterfly valve 61 is communicated with an output end of the ballast unit 7, an output end of the fifth butterfly valve 61 is communicated with an input end of the fifth throttle valve 62, an output end of the fifth throttle valve 62 is communicated with an input end of the fifth electronically controlled check valve 63, and an output end of the fifth electronically controlled check valve 63 is communicated with the first filter unit 1 and/or the second filter unit 4.
Meanwhile, the relief conveying unit 6 further comprises a fifth overflow valve 64, an input end of the fifth overflow valve 64 is communicated with an output end of the fifth electronic control check valve 63, and an output end of the fifth overflow valve 64 is communicated with the first filtering unit 1 and/or the second filtering unit 4.
The opening or closing of the discharge conveying unit 6 is realized by opening or closing the fifth butterfly valve 61 and the fifth electric control one-way valve 63, and when the discharge conveying unit 6 is opened, the ballast water of the ballast unit 7 can be communicated with the first filtering unit 1 or the second filtering unit 4 along the discharge conveying unit 6, so that the discharge of the ballast water in the discharge process is completed. The fifth overflow valve 64 is arranged in a loop of the relief conveying unit 6 and used as a backpressure valve group to generate backpressure, so that the action of relief becomes gentle, the impact during relief is reduced, and the stability of a ballast water system of the floating tank is improved.
In this application, first filter unit 1 includes valve body 11, prevents stifled cover 12 and filter screen 13, be provided with the passageway in the valve body 11, filter screen 13 sets up the middle part of passageway, prevent stifled cover 12 setting and be in the one end of passageway, the other end of passageway with the first port intercommunication of first double-acting pump 2.
Prevent stifled 12 similar valve inside structures of jam cover, can shelve silt suction in nozzle department when drawing water, can spout silt again during the water spray, prevent that long-time mud stone from piling up and causing the jam, impurity such as microorganism in filter screen 13 can filter aquatic makes the discharged water accord with the international mobile telecommunication of IO and requires.
The ballast conveying unit 3, the ballast unit 7 and the relief conveying unit 6 are all provided with a plurality of groups. The multiple groups of ballast conveying units 3, ballast units 7 and relief conveying units 6 are distributed on the periphery of the buoyancy tank and are matched to realize the lifting adjustment of the buoyancy tank. In the present embodiment, four sets of the ballast transfer unit 3, the ballast unit 7, and the relief transfer unit 6 are provided.
A control method of a towing buoyancy tank ballast water system comprises the following steps:
setting a liquid level upper limit value and a liquid level lower limit value of a ballast unit on an upper computer;
starting the first double-acting pump and the second double-acting pump, detecting the liquid level height in the ballast unit in real time through a liquid level sensor, and acquiring and recording the current liquid level height hn, wherein n is 1, 2, 3 … n, and n is the number of the ballast units; after ballast water is sucked for the first time, a liquid level sensor collects and records a new liquid level height set Hn, wherein n is 1, 2, 3 … n, and n is the number of ballast units; adopting a difference method to compare the new liquid level height set Hn with the relationship between the upper limit value and the lower limit value of the liquid level;
when the new liquid level height set Hn is smaller than the liquid level lower limit value, opening the electronic control one-way valve in the ballast conveying unit, closing the electronic control one-way valve in the ballast discharging conveying unit, and adjusting the flow of ballast water through the throttle valve to increase the liquid level of one or more ballast units to the interval between the liquid level upper limit value and the liquid level lower limit value;
when the new liquid level height set Hn is larger than the upper limit value of the liquid level, closing the electric control one-way valves in the ballast conveying units, opening the electric control one-way valves in the ballast discharging conveying units, and regulating the flow of ballast water through the throttle valve to reduce the liquid level of one or more ballast units to the interval between the upper limit value of the liquid level and the lower limit value of the liquid level;
when the new liquid level height set Hn is in the interval of the upper limit value and the lower limit value of the liquid level, all the electric control one-way valves in the ballast conveying unit and the discharge conveying unit are opened, the first butterfly valve and the fourth butterfly valve are opened, the second butterfly valve and the third butterfly valve are closed, the system is in a state of sucking seawater and discharging ballast water, the pressure sensor detects the pressure of the ballast unit, and the relation between the new liquid level height set Hn and the upper limit value and the lower limit value of the liquid level is judged.
And calculating a liquid level set value, if 2n same ballast tanks exist, the sectional area of each ballast tank is S, calculating the total volume V of ballast water according to buoyancy required under different working conditions, setting the basic liquid level value of each ballast tank as V/(2n S), and considering an error range delta h mainly caused by factors such as control errors, piping system loss and the like, wherein the upper limit and the lower limit of the liquid level set value are respectively V/(2n S) + delta h and V/(2n S) -delta h.
The monitoring system comprises an industrial personal computer, the liquid level state of each ballast tank can be observed in the monitoring system, and the opening and closing of the valve and the double-acting pump are controlled according to requirements to carry out related ballast operation. The monitoring system is a remote monitoring computer, can be installed on the installation ship and is used for monitoring the ballast operation. Its function has (1) can control 4 butterfly valves on the computer. The computer software interface may display indications of butterfly valve opening, closing, etc. (2) The levels of the 4 ballast units may also be displayed on the computer. (3) Double-acting pump control: and (4) remotely controlling start/stop, and displaying information such as running state, monitoring alarm and the like. And sending out an alarm signal in time, and carrying out corresponding emergency operation on equipment such as a valve, a pump and the like. (4) Ballast operation: according to the operation requirement, the valve can be manually or automatically operated through a calculation setting program according to the preset water level of the ballast water tank, and the operation links of pressure test, pile pressing, water drainage and the like of the ballast water system of the floating tank are completed. And obtaining the measured seawater density, and carrying out accurate ballast water calculation.
In the description herein, references to the description of the terms "embodiment," "example," etc., mean that a particular feature, structure, material, or characteristic described in connection with the embodiment or example is included in at least one embodiment or example of the invention. In this specification, the schematic representations of the terms used above do not necessarily refer to the same embodiment or example. Furthermore, the particular features, structures, materials, or characteristics described may be combined in any suitable manner in any one or more embodiments or examples.
The technical principle of the present invention is described above in connection with specific embodiments. The description is made for the purpose of illustrating the principles of the invention and should not be construed in any way as limiting the scope of the invention. Based on the explanations herein, those skilled in the art will be able to conceive of other embodiments of the present invention without inventive step, and these embodiments will fall within the scope of the present invention.
Claims (10)
1. A towing buoyancy tank ballast water system is characterized by comprising a first filtering unit, a first double-acting pump, a ballast conveying unit, a second filtering unit, a second double-acting pump, a discharge conveying unit and a ballast unit;
the first filtration unit and/or the second filtration unit is in communication with a first port of the first double-acting pump, a second port of the first double-acting pump is in communication with the ballast transfer unit, and the ballast transfer unit is in communication with the ballast unit; the first double-acting pump is used for communicating the first filtering unit and/or the second filtering unit and pumping seawater into the ballast unit through the ballast conveying unit;
the first filtration unit and/or the second filtration unit is in communication with a first port of the second dual-acting pump, a second port of the second dual-acting pump being in communication with the ballast transfer unit; the third port of the first dual-acting pump is in communication with the third port of the second dual-acting pump; the second double-acting pump is used for communicating the first filtering unit and/or the second filtering unit and pumping seawater into the ballast unit through the ballast conveying unit;
one end of the unloading and conveying unit is communicated with the ballast unit, and the other end of the unloading and conveying unit is communicated with the first filtering unit and/or the second filtering unit; the unloading conveying unit is used for communicating the first filtering unit and/or the second filtering unit and pumping ballast water out of the ballast unit.
2. The towing buoy tank ballast water system of claim 1, further comprising a first butterfly valve disposed between the second port of the first dual acting pump and the ballast transfer unit, a second butterfly valve, a third butterfly valve, and a fourth butterfly valve, the third butterfly valve disposed at the third port of the first dual acting pump; the second butterfly valve is disposed between the second port of the second dual-purpose pump and the ballast transfer unit, and the fourth butterfly valve is disposed at the third port of the second dual-purpose pump.
3. A towing buoy tank ballast water system as claimed in claim 1, wherein the ballast transfer unit comprises a first electrically controlled check valve and a first throttle valve, an input of the first electrically controlled check valve being in communication with the second port of the first double acting pump, an output of the first electrically controlled check valve being in communication with an input of the first throttle valve, an output of the first throttle valve being in communication with an input of the ballast unit; the first electrically controlled one-way valve is transported in a direction from the first double acting pump towards the ballast unit.
4. A towing pontoon ballast water system according to claim 3, wherein the ballast transfer unit further comprises a first overflow valve, the input of which is in communication with the ballast unit and the output of which is in communication with the first and/or second filtration unit.
5. The towing buoy tank ballast water system of claim 1, wherein the ballast unit further comprises a pressure sensor and a level sensor, a detection end of the pressure sensor being disposed within the ballast unit; the detection end of the liquid level sensor is arranged in the ballast unit.
6. A towing pontoon ballast water system according to claim 1, wherein the offloading transfer unit comprises a fifth butterfly valve, a fifth throttle valve and a fifth electrically controlled one-way valve, an input of the fifth butterfly valve communicating with the output of the ballast unit, an output of the fifth butterfly valve communicating with an input of the fifth throttle valve, an output of the fifth throttle valve communicating with an input of the fifth electrically controlled one-way valve, an output of the fifth electrically controlled one-way valve communicating with the first filter unit and/or the second filter unit.
7. The towing pontoon ballast water system according to claim 6, wherein the relief conveying unit further comprises a fifth overflow valve, an input end of which is in communication with an output end of the fifth electrically controlled check valve, and an output end of which is in communication with the first filtering unit and/or the second filtering unit.
8. The towing buoyancy tank ballast water system of claim 1, wherein the first filter unit comprises a valve body, an anti-clogging cover and a filter screen, a channel is arranged in the valve body, the filter screen is arranged in the middle of the channel, the anti-clogging cover is arranged at one end of the channel, and the other end of the channel is communicated with the first port of the first double-acting pump.
9. A towing pontoon ballast water system according to claim 1, wherein there are multiple sets of the ballast transfer units, ballast units and relief transfer units.
10. A control method of a towing buoyancy tank ballast water system is characterized by comprising the following steps:
setting a liquid level upper limit value and a liquid level lower limit value of a ballast unit on an upper computer;
starting the first double-acting pump and the second double-acting pump, detecting the liquid level height in the ballast unit in real time through the liquid level sensor, and acquiring and recording the current liquid level height hnN is 1, 2, 3 … n, and n is the number of ballast units; after the first intake of ballast water, the level sensor collects and records a new set H of level heightsnN is 1, 2, 3 … n, and n is the number of ballast units; comparing new liquid level height sets H by using difference methodnThe relation between the liquid level and the upper limit value and the lower limit value of the liquid level;
new set of liquid level heights HnWhen the liquid level is less than the lower limit value of the liquid level, opening the electric control one-way valve in the ballast conveying unit, closing the electric control one-way valve in the ballast discharging conveying unit, and regulating the flow of ballast water through the throttle valve to increase the liquid level of one or more ballast units to the interval between the upper limit value of the liquid level and the lower limit value of the liquid level;
new set of liquid level heights HnWhen the water level is higher than the upper limit value of the liquid level, the electric control one-way valve in the ballast conveying unit is closed, the electric control one-way valve in the ballast discharge conveying unit is opened, and the flow of ballast water is regulated through the throttle valveReducing the liquid level of the single or the plurality of ballast units to be within the interval of the upper limit value and the lower limit value of the liquid level;
new set of liquid level heights HnWhen the pressure sensor is in the interval of the upper limit value and the lower limit value of the liquid level, all the electric control one-way valves in the ballast conveying unit and the discharge conveying unit are opened, the first butterfly valve and the fourth butterfly valve are opened, the second butterfly valve and the third butterfly valve are closed, the system is in a state of sucking seawater and discharging ballast water, the pressure sensor detects the pressure of the ballast unit, and a new liquid level height set H is judgednThe upper limit value and the lower limit value of the liquid level.
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| CN202210270749.2A CN114475951A (en) | 2022-03-18 | 2022-03-18 | Towing buoyancy tank ballast water system and control method thereof |
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| CN202210270749.2A CN114475951A (en) | 2022-03-18 | 2022-03-18 | Towing buoyancy tank ballast water system and control method thereof |
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