CN215622580U - Platform seawater supply system with switchable multiple working conditions - Google Patents
Platform seawater supply system with switchable multiple working conditions Download PDFInfo
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- CN215622580U CN215622580U CN202120737429.4U CN202120737429U CN215622580U CN 215622580 U CN215622580 U CN 215622580U CN 202120737429 U CN202120737429 U CN 202120737429U CN 215622580 U CN215622580 U CN 215622580U
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Abstract
The utility model discloses a platform seawater supply system with switchable multiple working conditions, which belongs to the technical field of seawater systems on lifting marine platforms, and is used for supplying seawater based on a main hull part of a marine platform, and comprises a submersible pump B1, a seawater service pump B2, a fire pump B3, control valves V1-V8, a double-ball expansion joint S1, a closed water return pipe P1, an open sea drainage pipe P2, a submersible pump pipe section P3, a sea chest M1, a seawater buffer cabin C1, a high liquid level alarm LAH, a low liquid level alarm LAL, a control line E1 and a control unit K1. The platform seawater supply system with switchable multiple working conditions has the advantages that the seawater service system which can be used under three working conditions is provided and switched at any time, so that the system is simple and clear, the operation is simple and convenient, the maintenance and the use are easy, and the cost is low; meanwhile, the seawater can meet the requirement of a fire-fighting system except for general service, the fire-fighting system is embedded into a seawater service system and is supplied from the same source, the system is simple in design and convenient to use.
Description
Technical Field
The utility model belongs to the technical field of seawater systems on lifting marine platforms, and particularly relates to a platform seawater supply system with switchable multiple working conditions.
Background
The lifting type marine platform has three working conditions, namely a floating state, an operating state and a lifting system debugging state. Under the three working conditions, the main and auxiliary machines on the platform are operated to provide power, the main and auxiliary machines all need a seawater system to provide cooling, and in addition, the operations of fire fighting, drilling and the like of the platform all need seawater resources, so the seawater system on the platform needs to provide necessary and sufficient seawater supply service under the three working conditions.
In the prior art, the existing marine platform seawater service system mainly has the following defects and shortcomings:
1) the floating state and the pile lifting operation state are respectively independent seawater service systems, are not combined together, and cannot be flexibly switched, so that the system is repeatedly overstaffed and wastes resources.
2) In the debugging state of the lifting system, the platform leaves the sea surface along the pile leg lifting process, the highest distance is near one hundred meters from the sea surface, a sea bottom door and a submersible pump cannot be used, a seawater service system has no internal circulation and cannot provide necessary seawater service for the platform, seawater resources and support are provided by an auxiliary ship or a shore base outside the platform, the seawater needs to be lifted by nearly one hundred meters to be supplied to the platform, the operation scheme is complex, and the cost is high.
Disclosure of Invention
Aiming at the defects of the prior art, the utility model provides a platform seawater supply system with switchable multiple working conditions, so as to solve the problems in the background technology.
In order to achieve the purpose, the utility model provides the following technical scheme: a platform seawater supply system with switchable multiple working conditions is used for supplying seawater based on a main hull part of a marine platform and comprises a submersible pump B1, a seawater service pump B2, a fire pump B3, control valves V1-V8, a double-ball expansion joint S1, a closed water return pipe P1, an open sea drainage pipe P2, a submersible pump pipe section P3, a sea chest M1, a seawater buffer cabin C1, a high liquid level alarm instrument LAH, a low liquid level alarm instrument LAL, a control line E1 and a control unit K1;
the marine platform comprises a main hull part, pile legs, a ship bottom base line and a whole-ship seawater service system ring network;
the submersible pump B1 is used for absorbing water from the sea under the working condition and supplying the water to a whole-ship seawater service system looped network;
the seawater service pump B2 is used for performing water absorption work from a sea chest M1 under the floating working condition and is used by each terminal of a maritime work platform;
the fire pump B3 is used for taking water from the seawater buffer cabin C1 under the working condition;
the control valve V1-V8 is used for controlling the opening and closing of the supply pipe section when the operation working condition, the floating working condition and the lifting debugging working condition are switched;
the double-ball expansion joint S1 is used for connecting the outlet of the pipe section with a flange of a ring network of the whole-ship seawater service system;
the closed water return pipe P1, the open sea discharge pipe P2 and the submersible pump pipe section P3 are used for carrying out water circulation on seawater in the platform seawater supply system under different working conditions;
the high liquid level alarm LAH and the low liquid level alarm LAL are used for monitoring the liquid level of the seawater buffer cabin C1 and giving an alarm, and providing signals for remotely opening and closing the valve and the pump;
the control unit K1 is used for remotely controlling the components, the components are connected to the control unit K1 through a control line E1, the real-time state of the seawater buffer cabin C1 is monitored, and corresponding valves and pumps are opened and closed in a remote control mode to achieve real-time switching.
Further optimizing the technical scheme, the double-ball expansion joint S1 is made of rubber embedded woven meshes, and flanges are arranged at two ends of the double-ball expansion joint, so that the double-ball expansion joint can provide large displacement in the horizontal and vertical directions and is used for compensating installation errors during the disassembly and assembly of the submersible pump pipe section.
Further optimizing the technical scheme, the LAH height of the high liquid level alarm is generally set to be 95% of the cabin capacity, and the high liquid level alarm is used for preventing the buffer cabin from being filled with excessive seawater and overflowing from the ventilation port.
Further optimizing the technical scheme, when the platform seawater supply system is under a floating working condition, the main hull part of the marine platform is immersed in the sea to obtain buoyancy, at the moment, the pile legs are in a recovery state, the bottoms of the pile legs are level with the base line of the ship bottom, a seawater service pump B2 is used for sucking water from a sea bottom door M1, a control valve V8 is kept closed, control valves V1 and V7 are opened, and the water is conveyed to a whole-ship seawater service system network; the seawater service pump B2 and the fire pump B3 should be positioned below the sea surface to keep the start clear.
Further optimizing the technical scheme, when the platform seawater supply system is in an operation working condition, the pile legs are inserted into the seabed, the main hull part climbs along the racks on the pile legs, leaves the sea surface, keeps the air gap height, enters an operation state, the seabed door M1 cannot be used, and the submersible pump B1 is used for absorbing water from the sea mechanical energy and supplying the water to a whole-ship seawater service system looped network.
Further optimizing the technical scheme, when the platform seawater supply system is in a lifting debugging working condition, the main hull part needs to climb to the maximum height along the racks on the pile legs, then descend back to the sea surface, and complete a complete lifting debugging process; in the debugging process, the main hull part moves relative to the spud legs ceaselessly, the submersible pump B1 and the sea chest M1 cannot take water, and the seawater service pump B2 is used for taking water from the seawater buffer cabin C1 and conveying the water to the ring network of the whole-ship seawater service system.
Compared with the prior art, the utility model provides a platform seawater supply system with switchable multiple working conditions, which has the following beneficial effects:
1. in the platform seawater supply system with switchable multiple working conditions, under the floating working condition, the seawater service pump directly absorbs water from the sea bottom door of the ship body and supplies the water to the seawater service system of the whole ship, and cooling water is directly discharged to the sea in an open mode; under the working condition, a submersible pump is used for absorbing water from the sea, a whole ship service system is accessed, and cooling water is directly discharged to the sea in an open mode; under the debugging working condition of the lifting system, seawater stored in a buffer cabin in the platform is used for accessing a whole-ship seawater service system, and cooling water returns to the buffer cabin for closed internal circulation.
2. The platform seawater supply system with switchable multiple working conditions has the advantages that the seawater service system which can be used under three working conditions is provided and switched at any time, so that the system is simple and clear, the operation is simple and convenient, the maintenance and the use are easy, and the cost is low; meanwhile, the seawater can meet the requirement of a fire-fighting system except for general service, the fire-fighting system is embedded into a seawater service system and is supplied from the same source, the system is simple in design and convenient to use.
3. This changeable platform sea water supply system of multiplex condition, immersible pump and export pipeline section have many interfaces and many supporting positions, and the back is hoisted to the loop wheel machine, and manual support is rotatory can accomplish the support, and the power is said and can install the activity extension rod additional inadequately to connect with two ball expansion joints, the displacement compensation volume is big, has the simple and convenient practicality of operation on the whole, easily dismouting and maintenance, the lower beneficial effect of cost.
4. The platform seawater supply system with the switchable multiple working conditions is used for monitoring the liquid level of the buffer cabin and alarming by arranging the control unit, and opening and closing the corresponding valves and pumps in a remote control manner to realize real-time switching.
Drawings
Fig. 1 is a schematic structural diagram of a platform seawater supply system with switchable multiple working conditions in a floating working condition, according to the present invention;
fig. 2 is a schematic structural diagram of a platform seawater supply system with switchable multiple working conditions according to the present invention under an operating condition;
fig. 3 is a schematic structural diagram of a platform seawater supply system with switchable multiple working conditions, which is provided by the utility model, under a lifting debugging working condition;
fig. 4 is a schematic diagram of the lifting of a submersible pump pipe section in the platform seawater supply system with switchable multiple operating conditions according to the present invention.
In the figure: b1, a submersible pump; b2, a seawater service pump; b3, a fire pump; v1, control valve; v2, control valve; v3, control valve; v4, control valve; v5, control valve; v6, control valve; v7, control valve; v8, control valve; p1, a closed water return pipe; p2, open sea drainage pipe; p3, a submersible pump pipe section; m1, subsea door; c1, a seawater buffer cabin; LAH, high liquid level alarm; LAL, low liquid level alarm; e1, control line; k1, a control unit.
Detailed Description
The technical solutions in the embodiments of the present invention will be clearly and completely described below with reference to the embodiments of the present invention, and it is obvious that the described embodiments are only a part of the embodiments of the present invention, and not all of the embodiments. 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 first embodiment is as follows:
a platform seawater supply system with switchable multiple working conditions is used for supplying seawater based on a main hull part of a marine platform and comprises a submersible pump B1, a seawater service pump B2, a fire pump B3, control valves V1-V8, a double-ball expansion joint S1, a closed water return pipe P1, an open sea drainage pipe P2, a submersible pump pipe section P3, a sea chest M1, a seawater buffer cabin C1, a high liquid level alarm instrument LAH, a low liquid level alarm instrument LAL, a control line E1 and a control unit K1;
the marine platform comprises a main hull part, pile legs, a ship bottom base line and a whole-ship seawater service system ring network;
the submersible pump B1 is used for absorbing water from the sea under the working condition and supplying the water to a whole-ship seawater service system looped network;
the seawater service pump B2 is used for performing water absorption work from a sea chest M1 under the floating working condition and is used by each terminal of a maritime work platform;
the fire pump B3 is used for taking water from the seawater buffer cabin C1 under the working condition;
the control valve V1-V8 is used for controlling the opening and closing of the supply pipe section when the operation working condition, the floating working condition and the lifting debugging working condition are switched;
the double-ball expansion joint S1 is used for connecting the outlet of the pipe section with a flange of a ring network of the whole-ship seawater service system;
the closed water return pipe P1, the open sea discharge pipe P2 and the submersible pump pipe section P3 are used for carrying out water circulation on seawater in the platform seawater supply system under different working conditions;
the high liquid level alarm LAH and the low liquid level alarm LAL are used for monitoring the liquid level of the seawater buffer cabin C1 and giving an alarm, and providing signals for remotely opening and closing the valve and the pump;
the control unit K1 is used for remotely controlling the components, the components are connected to the control unit K1 through a control line E1, the real-time state of the seawater buffer cabin C1 is monitored, and corresponding valves and pumps are opened and closed in a remote control mode to achieve real-time switching.
Specifically, the double-ball expansion joint S1 is made of rubber embedded woven meshes, and flanges are arranged at two ends of the double-ball expansion joint, so that large horizontal and vertical displacement can be provided, and installation errors in the process of assembling and disassembling the submersible pump pipe section can be compensated.
Specifically, the LAH height of the high liquid level alarm instrument is generally set to 95% of the cabin capacity, so as to prevent the buffer cabin from being filled with excessive seawater and overflowing from the ventilation port.
Example two:
referring to fig. 1, when the platform seawater supply system with switchable multiple operating modes described in the first embodiment is used in a floating operating mode, the main hull part of the platform is submerged in the sea to obtain buoyancy, at the moment, the pile legs are in a recovery state, the bottoms of the pile legs are parallel to the base line of the bottom of the ship, the reef is prevented from being touched in a shallow water, and the submersible pump B1 is at a higher position and cannot be used. Under the working condition, a seawater service pump B2 is used for sucking water from a sea chest M1, a control valve V8 is kept closed, control valves V1 and V7 are opened, the pump is used for conveying the water to a whole ship seawater service system network for use by each terminal, the water of the sea chest is inexhaustible, so the cooled seawater is directly discharged through a control valve V6 and an open type sea discharge pipe P2, the control valve V5 is kept closed, and the control valve V6 is kept opened. Under the working condition, the fire pump B3 also takes water from the submarine gate M1 and conveys the water into the fire-fighting looped network. The position of the seawater service pump B2 and the fire pump B3 should be at a low level, below the sea surface, with a sufficiently net positive suction head to keep the start clear. The double ball expansion joint S1 is in the removed state and the control valve V3 remains closed.
Referring to fig. 2, under the working condition, the pile legs are inserted into the sea bottom, the main hull part of the platform climbs along the racks on the pile legs, leaves the sea surface, keeps at a reasonable air gap height, and enters the working state. At the moment, the sea chest M1 can not be used, and a submersible pump B1 is needed to absorb water from the sea and supply the water to a whole-ship seawater service system ring network. Meanwhile, as shown in fig. 4, a crane is used for lifting a submersible pump B1 and a submersible pump pipe section P3 thereof, a pump body and a suction inlet of the submersible pump B1 are immersed into the sea to be at a reasonable depth, then manual support is operated, the submersible pump B1 and the submersible pump pipe section P3 thereof are supported, then a double-ball expansion joint S1 is used for connecting an outlet of the pipe section with a flange of a whole-ship seawater service system looped network, the position of the connected pipe section is shown in fig. 2, the double-ball expansion joint S1 is made of rubber embedded woven nets, and flanges are arranged at two ends of the double-ball expansion joint S1, so that large horizontal and vertical displacement can be provided, and mounting errors during assembly and disassembly of the submersible pump pipe section can be compensated. The submersible pump pipe section P3 is provided with a plurality of fixing points and connecting pipe orifices for connection at different air gap working heights. The cooling water of the ring network of the whole ship seawater service system is directly discharged into the sea through the control valve V6 and the open sea discharge pipe P2. At this point, fire pump B3 should take water from seawater buffer bay C1, so control valve V5 should be opened to allow the seawater loop network to fill bay C1 and then close for use by fire pump B3 when needed. At this point, the hold control valve V7 is closed and the control valve V8 is opened.
Referring to fig. 3, under the lifting and debugging condition, the main hull of the platform needs to climb to the maximum height along the rack on the spud leg, and then descend back to the sea surface, and complete a complete lifting and debugging process is completed. In the debugging process, the main hull of the platform moves relative to the spud legs ceaselessly, the submersible pump B1 and the sea chest M1 cannot take water, at the moment, the seawater service pump B2 can only be used for taking water from the seawater buffer cabin C1 and conveying the water to a looped network of a whole-ship seawater service system, cooling water returns to the seawater buffer cabin C1 again through the control valve V5 and the closed water return pipe P1 to perform seawater service internal circulation, at the moment, the control valve V5 is opened, and the control valve V6 is kept closed. The fire pump B3 can only get water from the seawater buffer cabin C1, the water yield is calculated to be Q1 according to the requirement of the classification society that the fire water needs to meet the water quantity requirement of minimum 30 minutes, in addition, the cooling water quantity needed by the whole ship seawater service looped network is calculated to be Q2 according to the maximum time (calculated according to 4 hours) in the whole lifting debugging process, and a larger value is taken from (Q1, Q2), namely the minimum design volume of the seawater buffer cabin C1. If the volume does not reach the standard, the cooling water quantity is insufficient or the water quantity of a fire fighting system is enough, so that the debugging and fire fighting safety of the lifting system are influenced. In addition, the minimum level of seawater buffer tank C1 should be higher than the suction port positions of seawater service pump B2 and fire pump B3 to keep both pumps with a sufficiently clean positive suction head and clear to start.
While the control unit K1 is used to implement real-time remote handover. The low liquid level alarm LAL and LAH are used for monitoring the liquid level of the seawater buffer cabin C1 and giving an alarm and providing signals for remotely opening and closing the valve and the pump. The volume of the cabin corresponding to the height of the low liquid level alarm instrument LAL is a larger value (Q1, Q2), and the height of the high liquid level alarm instrument LAH is generally set to be 95% of the cabin volume so as to prevent the seawater buffer cabin C1 from overflowing from the ventilation port excessively when being filled with seawater. When LAL alarms, the control valve V5 is opened and the submersible pump B1 or the seawater service pump B2 is used for injecting until the LAH alarms, namely the control valve V5 is closed.
Example three:
when the platform seawater supply system with switchable multiple working conditions in the first embodiment is used in a floating working condition, the main hull part of the platform is immersed in the sea to obtain buoyancy, at the moment, the pile legs are in a recovery state, the bottoms of the pile legs are parallel to the base line of the ship bottom, the situation that the reef is touched by shallow water is avoided, and the submersible pump B1 is located at a higher position and cannot be used. Under the working condition, a seawater service pump B2 is used for sucking water from a sea chest M1, a control valve V8 is kept closed, control valves V1 and V7 are opened, the pump is used for conveying the water to a whole ship seawater service system network for use by each terminal, the water of the sea chest is inexhaustible, so the cooled seawater is directly discharged through a control valve V6 and an open type sea discharge pipe P2, the control valve V5 is kept closed, and the control valve V6 is kept opened. Under the working condition, the fire pump B3 also takes water from the submarine gate M1 and conveys the water into the fire-fighting looped network. The position of the seawater service pump B2 and the fire pump B3 should be at a low level, below the sea surface, with a sufficiently net positive suction head to keep the start clear. The double ball expansion joint S1 is in the removed state and the control valve V3 remains closed.
In the example arrangement, the installation height of the suction ports of the seawater service pump B2 and the fire pump B3 is 2 meters higher than the baseline of the ship body, and the normal waterline of the sea surface is 4 meters higher than the baseline when the platform floats.
Under the working condition, the pile legs are inserted into the seabed, the main hull part of the platform climbs along the racks on the pile legs, leaves the sea surface, keeps at a reasonable air gap height, and enters the working state. At the moment, the sea chest M1 can not be used, and a submersible pump B1 is needed to absorb water from the sea and supply the water to a whole-ship seawater service system ring network. A crane is used for lifting a submersible pump B1 and a submersible pump pipe section P3 thereof, a pump body and a suction inlet of the submersible pump B1 are immersed into the sea and are at a reasonable depth, then manual support is operated, the submersible pump B1 and the submersible pump pipe section P3 thereof are supported by rotating 90 degrees clockwise, then the outlet of the pipe section is connected with a flange of a whole-ship seawater service system ring net by using a double-ball expansion joint S1, the double-ball expansion joint S1 is made of rubber embedded woven nets, and flanges are arranged at two ends of the double-ball expansion joint, so that large displacement in the horizontal direction and the vertical direction can be provided, and the installation error in the process of assembling and disassembling the submersible pump pipe sections can be compensated. The submersible pump pipe section P3 is provided with a plurality of fixing points and connecting pipe orifices for connection at different air gap working heights. The cooling water of the ring network of the whole ship seawater service system is directly discharged into the sea through the control valve V6 and the open sea discharge pipe P2. At this point, fire pump B3 should take water from seawater buffer bay C1, so control valve V5 should be opened to allow the seawater loop network to fill bay C1 and then close for use by fire pump B3 when needed. At this point, the hold control valve V7 is closed and the control valve V8 is opened.
The expansion joint with the length of 600mm can be actually selected in the embodiment, the horizontal displacement is +/-50 mm, the vertical displacement is +/-15 mm, the compensation amount is large, and the installation is convenient.
Under the lifting debugging working condition, the main hull part of the platform needs to climb to the maximum height along the racks on the pile legs and then descend back to the sea surface, and a complete lifting debugging process is completed. In the debugging process, the main hull of the platform moves relative to the spud legs ceaselessly, the submersible pump B1 and the sea chest M1 cannot take water, at the moment, the seawater service pump B2 can only be used for taking water from the seawater buffer cabin C1 and conveying the water to a looped network of a whole-ship seawater service system, cooling water returns to the seawater buffer cabin C1 again through the control valve V5 and the closed water return pipe P1 to perform seawater service internal circulation, at the moment, the control valve V5 is opened, and the control valve V6 is kept closed. The fire pump B3 can only get water from the seawater buffer cabin C1, the water yield is calculated to be Q1 according to the requirement of the classification society that the fire water needs to meet the water quantity requirement of minimum 30 minutes, in addition, the cooling water quantity needed by the whole ship seawater service looped network is calculated to be Q2 according to the maximum time (calculated according to 4 hours) in the whole lifting debugging process, and a larger value is taken from (Q1, Q2), namely the minimum design volume of the seawater buffer cabin C1. If the volume does not reach the standard, the cooling water quantity is insufficient or the water quantity of a fire fighting system is enough, so that the debugging and fire fighting safety of the lifting system are influenced. In addition, the minimum level of seawater buffer tank C1 should be higher than the suction port positions of seawater service pump B2 and fire pump B3 to keep both pumps with a sufficiently clean positive suction head and clear to start.
Wherein, the water discharge of the fire pump B3 is 200m3H, calculating the water yield Q1 to be 100m3In addition, according to the maximum time (calculated according to 4 hours) of the whole lifting debugging process, the required cooling water quantity of the whole ship seawater service looped network is calculated to be Q2-180 m3Taking the larger value of 180m from (Q1, Q2)3I.e. the minimum design volume of the seawater buffer cabin C1 is 180m3。
While the control unit K1 is used to implement real-time remote handover. The low liquid level alarm LAL and LAH are used for monitoring the liquid level of the seawater buffer cabin C1 and giving an alarm and providing signals for remotely opening and closing the valve and the pump. The volume of the cabin corresponding to the height of the low liquid level alarm instrument LAL is a larger value (Q1, Q2), and the height of the high liquid level alarm instrument LAH is generally set to be 95% of the cabin volume so as to prevent the seawater buffer cabin C1 from overflowing from the ventilation port excessively when being filled with seawater. When LAL alarms, the control valve V5 is opened and the submersible pump B1 or the seawater service pump B2 is used for injecting until the LAH alarms, namely the control valve V5 is closed.
Wherein, the actual value of the seawater buffer cabin C1 is 230m3Greater than 180m3The volume corresponding to the high-level alarm height is 218.5m3。
Example four:
the utility model provides a changeable platform sea water feed system of multiplex condition can carry out the flexibility according to the over-and-under type marine platform of different grade type and dispose: a plurality of pumps, a plurality of submarine doors and a plurality of buffer cabins are arranged according to needs, the number of remote control valves is increased or decreased, so that the actual needs are flexibly met, and the remote control valves have mutual backup functions. The lengths of the submersible pump and the outlet pipe section can be flexibly configured according to the height of the platform so as to meet the actual requirement.
The utility model has the beneficial effects that:
1. in the platform seawater supply system with switchable multiple working conditions, under the floating working condition, the seawater service pump directly absorbs water from the sea bottom door of the ship body and supplies the water to the seawater service system of the whole ship, and cooling water is directly discharged to the sea in an open mode; under the working condition, a submersible pump is used for absorbing water from the sea, a whole ship service system is accessed, and cooling water is directly discharged to the sea in an open mode; under the debugging working condition of the lifting system, seawater stored in a buffer cabin in the platform is used for accessing a whole-ship seawater service system, and cooling water returns to the buffer cabin for closed internal circulation.
2. The platform seawater supply system with switchable multiple working conditions has the advantages that the seawater service system which can be used under three working conditions is provided and switched at any time, so that the system is simple and clear, the operation is simple and convenient, the maintenance and the use are easy, and the cost is low; meanwhile, the seawater can meet the requirement of a fire-fighting system except for general service, the fire-fighting system is embedded into a seawater service system and is supplied from the same source, the system is simple in design and convenient to use.
3. This changeable platform sea water supply system of multiplex condition, immersible pump and export pipeline section have many interfaces and many supporting positions, and the back is hoisted to the loop wheel machine, and manual support is rotatory can accomplish the support, and the power is said and can install the activity extension rod additional inadequately to connect with two ball expansion joints, the displacement compensation volume is big, has the simple and convenient practicality of operation on the whole, easily dismouting and maintenance, the lower beneficial effect of cost.
4. The platform seawater supply system with the switchable multiple working conditions is used for monitoring the liquid level of the buffer cabin and alarming by arranging the control unit, and opening and closing the corresponding valves and pumps in a remote control manner to realize real-time switching.
In the description herein, references to the description of the term "one embodiment," "some embodiments," "an example," "a specific example," or "some examples," 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 utility model. In this specification, the schematic representations of the terms used above are not necessarily intended to 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. Furthermore, various embodiments or examples and features of different embodiments or examples described in this specification can be combined and combined by one skilled in the art without contradiction.
Although embodiments of the present invention have been shown and described, it will be appreciated by those skilled in the art that changes, modifications, substitutions and alterations can be made in these embodiments without departing from the principles and spirit of the utility model, the scope of which is defined in the appended claims and their equivalents.
Claims (6)
1. A platform seawater supply system with switchable multiple working conditions is used for supplying seawater based on a main hull part of a marine platform and is characterized by comprising a submersible pump B1, a seawater service pump B2, a fire pump B3, control valves V1-V8, a double-ball expansion joint S1, a closed water return pipe P1, an open type sea drainage pipe P2, a submersible pump pipe section P3, a sea chest M1, a seawater buffer cabin C1, a high liquid level alarm instrument LAH, a low liquid level alarm instrument LAL, a control line E1 and a control unit K1;
the marine platform comprises a main hull part, pile legs, a ship bottom base line and a whole-ship seawater service system ring network;
the submersible pump B1 is used for absorbing water from the sea under the working condition and supplying the water to a whole-ship seawater service system looped network;
the seawater service pump B2 is used for performing water absorption work from a sea chest M1 under the floating working condition and is used by each terminal of a maritime work platform;
the fire pump B3 is used for taking water from the seawater buffer cabin C1 under the working condition;
the control valve V1-V8 is used for controlling the opening and closing of the supply pipe section when the operation working condition, the floating working condition and the lifting debugging working condition are switched;
the double-ball expansion joint S1 is used for connecting the outlet of the pipe section with a flange of a ring network of the whole-ship seawater service system;
the closed water return pipe P1, the open sea discharge pipe P2 and the submersible pump pipe section P3 are used for carrying out water circulation on seawater in the platform seawater supply system under different working conditions;
the high liquid level alarm LAH and the low liquid level alarm LAL are used for monitoring the liquid level of the seawater buffer cabin C1 and giving an alarm, and providing signals for remotely opening and closing the valve and the pump;
the control unit K1 is used for remotely controlling the components, the components are connected to the control unit K1 through a control line E1, the real-time state of the seawater buffer cabin C1 is monitored, and corresponding valves and pumps are opened and closed in a remote control mode to achieve real-time switching.
2. The switchable platform seawater supply system of claim 1, wherein the double-ball expansion joint S1 is made of rubber embedded woven mesh, and has flanges at two ends to provide large horizontal and vertical displacement for compensating installation error during assembly and disassembly of the submersible pump pipe section.
3. The switchable platform seawater supply system of claim 1, wherein the LAH height of the high level alarm is set to be generally 95% of the tank capacity, so as to prevent the buffer tank from overflowing from the vent hole due to excessive filling of seawater.
4. The switchable platform seawater supply system of claim 1, wherein when the platform seawater supply system is in a floating condition, the main hull part of the marine platform is submerged in the sea to obtain buoyancy, at the moment, the spud legs are in a recovery state, the bottoms of the spud legs are level with the baseline of the ship bottom, water is sucked from a sea bottom door M1 by using a seawater service pump B2, a control valve V8 is kept closed, and control valves V1 and V7 are opened to convey water to a whole ship seawater service system network; the seawater service pump B2 and the fire pump B3 should be positioned below the sea surface to keep the start clear.
5. The switchable platform seawater supply system of claim 1, wherein in the working condition of the platform seawater supply system, the spud legs are inserted into the seabed, the main hull part climbs along the rack on the spud legs, leaves the sea surface, maintains the air gap height, enters the working state, the sea bottom door M1 is unavailable, and the submersible pump B1 is used for absorbing water from the mechanical energy in the sea to supply to the looped network of the marine service system of the whole ship.
6. The switchable platform seawater supply system according to claim 1, wherein when the platform seawater supply system is in a lifting debugging condition, the main hull part needs to climb to the maximum height along the rack on the spud leg, then descend back to the sea surface, and complete a complete lifting debugging process; in the debugging process, the main hull part moves relative to the spud legs ceaselessly, the submersible pump B1 and the sea chest M1 cannot take water, and the seawater service pump B2 is used for taking water from the seawater buffer cabin C1 and conveying the water to the ring network of the whole-ship seawater service system.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202120737429.4U CN215622580U (en) | 2021-04-12 | 2021-04-12 | Platform seawater supply system with switchable multiple working conditions |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202120737429.4U CN215622580U (en) | 2021-04-12 | 2021-04-12 | Platform seawater supply system with switchable multiple working conditions |
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| Publication Number | Publication Date |
|---|---|
| CN215622580U true CN215622580U (en) | 2022-01-25 |
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| CN202120737429.4U Active CN215622580U (en) | 2021-04-12 | 2021-04-12 | Platform seawater supply system with switchable multiple working conditions |
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| Country | Link |
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| CN (1) | CN215622580U (en) |
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