An integrated seawater system for marine structures and a management method

Abstract

An integrated seawater system and management method for a marine structure, comprising a plurality of columns. An integrated system is installed between two adjacent columns or between columns in the diagonal regions. The installation structure of the integrated system is as follows: It includes a first seawater tank and a second seawater tank. The first seawater tank and the second seawater tank are connected by a seawater tank connecting pipe. A ballast tank combination is installed at the corresponding bottom position of the seawater tank area. The first seawater tank is sequentially connected in series with a first water supply pump combination, a first flowmeter, and a first equipment combination through pipelines. The first equipment combination is connected to the second seawater tank. The outlet of the first equipment combination is connected to a fourth control valve and a second discharge to the side through a branch pipeline. The second seawater tank adopts the same installation method as above. It also includes a first seawater pump set and a second seawater pump set respectively connected to the seawater tank. The first collecting pipe and the second collecting pipe are connected through a seawater connecting pipe, with good safety and reliability and low cost.

Description

Technical Field

[0001] The present invention relates to the technical field of seawater supply systems for marine structures, and in particular to a seawater integration system and management method for marine structures. Background Art

[0002] With the great strides in ocean development, a series of marine floating structures have been widely used in the process of ocean development. Among them, more and more small-scale marine structures for scientific research and personnel accommodation are designed and built.

[0003] Among these marine structures, many scientific research structures are basically anchored and deployed as fixed structures in waters far from the mainland or reefs. Currently, most of the seawater used for the production and living of marine scientific research and living structures is obtained from the sea chests at the bottom of the structures. This form requires an inlet to be opened on the outer bottom plate of the structure for installing a sea grille, and seawater is provided to the structure through the sea valve on the bulkhead inside the sea chest. The integrity of the outer plate of the structure is damaged. Although there are reinforcements, there are still safety risks. At the same time, due to the existence of the sea chest, there is a connection between the internal compartments of the structure and the external seawater. Coupled with the special geographical location where the structure is deployed, it is extremely difficult to re-enter the dry dock for maintenance. The sea valves at the bottom of the structure are prone to damage over time, and more seriously, it may lead to the inability to control the seawater from entering the structure, causing the structure to be flooded, and in severe cases, the structure may capsize. This poses a great hidden danger to the lifespan of the structure and the safety of the scientific personnel on the structure.

[0004] In addition, the traditional method of supplying seawater using the sea chests at the bottom of the structure has a large amount of energy waste. Each seawater user unit is equipped with an independent seawater pump, resulting in a large number of seawater pumps on the structure, which is relatively complex to control. Moreover, many seawater pumps have redundant flow rates, consuming a large amount of energy during operation, causing a large waste of the operation cost of the structure.

[0005] How to overall manage the centralized supply of seawater for the structure while ensuring the integrity of the outer plate of the structure is a common problem in the current design and construction of structures, and it also affects the safety and reliability of the structure. Summary of the Invention

[0006] The applicant of the present invention aims at the above-mentioned disadvantages in the existing production technology and provides a seawater integration system and management method for marine structures, so that it can ensure the low-power supply of seawater on the structure while maintaining the integrity of the outer plate of the structure and saving energy, with good safety and reliability, and greatly reducing the cost.

[0007] The technical solution adopted by the present invention is as follows:

[0008] An integrated seawater system for an offshore structure, comprising four columns of a column-stabilized structure. Starting from the aft starboard side of the structure, the columns of the structure are sequentially divided into Column A, Column B, Column C, and Column D. An integrated system is installed between adjacent two columns or between columns in opposite corner areas. The installation structure of the integrated system is as follows: It includes a No. 1 seawater tank and a No. 2 seawater tank. The No. 1 seawater tank is located in one of the columns, and the No. 2 seawater tank is located in another column. The No. 1 seawater tank and the No. 2 seawater tank are connected by a seawater tank connecting pipe, and a connecting control valve is installed on the seawater tank connecting pipe; a No. 1 ballast tank combination is installed at the bottom position corresponding to the area of the No. 1 seawater tank, and a No. 2 ballast tank combination is installed at the bottom position corresponding to the area of the No. 2 seawater tank. The seawater tank connecting pipe passes through the No. 1 ballast tank combination and the No. 2 ballast tank combination for cooling. The No. 1 ballast tank combination and the No. 2 ballast tank combination are installed in the lower floating body, and the top surface of the lower floating body is the upper deck. Above the No. 1 seawater tank and the No. 2 seawater tank is the wet deck, and above the wet deck is the open deck. The No. 1 seawater tank is sequentially connected in series with a No. 1 water supply pump combination, a No. 1 flowmeter, and a No. 1 equipment combination through pipelines. The No. 1 equipment combination is connected to the No. 2 seawater tank, and a No. 2 control valve is installed on the pipeline between the No. 1 equipment combination and the No. 2 seawater tank; the No. 2 seawater tank is sequentially connected in series with a No. 2 water supply pump combination, a No. 2 flowmeter, and a No. 2 equipment combination through pipelines. The No. 2 equipment combination is connected to the No. 1 seawater tank, and a No. 3 control valve is installed on the pipeline between the No. 2 equipment combination and the No. 1 seawater tank. The outlet of the No. 2 equipment combination is connected to a No. 1 control valve and a No. 1 overboard discharge through a branch pipeline; the outlet of the No. 1 equipment combination is connected to a No. 4 control valve and a No. 2 overboard discharge through a branch pipeline; it further includes a No. 1 seawater pump set and a No. 2 seawater pump set. The No. 1 seawater pump set is connected to the No. 1 seawater tank through a No. 1 collecting pipe, and the No. 2 seawater pump set is connected to the No. 2 seawater tank through a No. 2 collecting pipe. The No. 1 collecting pipe and the No. 2 collecting pipe are connected through a seawater connecting pipe, and a flow regulating valve is installed on the seawater connecting pipe; it further includes a control unit, and the control unit is electrically connected to each pump and each valve.

[0009] Its further technical solution lies in that:

[0010] On the outer side of each column, there is a No. 1 seawater pump combination or a No. 2 seawater pump combination, and the structures of the No. 1 seawater pump combination and the No. 2 seawater pump combination are the same.

[0011] The structure of the No. 1 seawater pump combination is as follows: It includes seawater pumps each suspended on the outer side of the column. Each seawater pump is connected to the interior of the structure through a seawater pipe, and a seawater sleeve is sleeved outside the seawater pump and the seawater pipe.

[0012] The seawater pumps on the outer sides of all Column A and Column C are combined into a No. 1 seawater pump set.

[0013] The seawater pumps on the outer sides of all Column B and Column D are combined into a No. 2 seawater pump set.

[0014] A liquid level sensor and a temperature sensor are installed at the bottom of the first seawater tank.

[0015] A liquid level sensor and a temperature sensor are installed at the bottom of the second seawater tank.

[0016] The installation heights of the first seawater tank and the second seawater tank are both higher than the designed draft height.

[0017] The pumps in the first water supply pump combination and the second water supply pump combination are all self-priming pumps.

[0018] A management method for a seawater integration system of a marine structure includes the following operation steps:

[0019] S1: Inject water into the first seawater tank and the second seawater tank;

[0020] At the beginning of the system, there is no seawater in the first seawater tank. Use the first seawater pump set to inject water into the first seawater tank. In order to inject water quickly, the second seawater pump set is turned on, and the flow control valve is controlled to open. The second seawater pump set pumps seawater into the first seawater tank together;

[0021] When the first seawater tank is about to be filled with water, stop pumping water;

[0022] During the above process, the connection control valves at the bottoms of the first seawater tank and the second seawater tank are closed, and the two seawater tanks are independent of each other;

[0023] If water is to be injected into the second seawater tank, the second seawater pump set injects water into the second seawater tank. In order to inject water quickly, the first seawater pump set is turned on, and the flow control valve is controlled to open. The first seawater pump set pumps seawater into the second seawater tank together;

[0024] When the second seawater tank is about to be filled with water, stop pumping water;

[0025] During the above process, the connection control valves at the bottoms of the first seawater tank and the second seawater tank are closed, and the two seawater tanks are independent of each other;

[0026] S2: Inject ballast water into the ballast tank;

[0027] In order to ensure the attitude balance of the structure and reduce the torque imbalance of the seawater in the seawater tank on the structure, resulting in the instability of the structure, after seawater is respectively injected into the first seawater tank and the second seawater tank, control the connection control valve to open;

[0028] The first seawater tank is connected to the second seawater tank. Under the action of the external atmospheric pressure, the liquid levels in the two seawater tanks are balanced and at the same horizontal line, and the acting torques on the structure are symmetrical to each other;

[0029] Seawater in the No. 1 seawater tank flows into the ballast water tank. When the liquid level in the No. 1 seawater tank is low, the control unit controls the start of the No. 1 seawater pump set according to the flow rate flowing into the ballast water tank. The flow rate of the operating seawater pump is greater than the flow rate flowing into the ballast water tank, and the control valve on the No. 1 collecting pipe is opened. Seawater is pumped into the No. 1 seawater tank through the No. 1 collecting pipe;

[0030] Due to the effect of the liquid level difference, while the No. 1 seawater tank replenishes water to the ballast water tank, seawater in the No. 2 seawater tank flows through the connecting control valve into the No. 1 seawater tank to ensure the stability of water replenishment and the stability of the structural stability posture;

[0031] If a water pump in the No. 1 seawater pump set in the stern area fails, resulting in the equipment in the stern area being unable to obtain seawater and affecting normal operation, the pump in the bow area can provide seawater to the equipment in the stern area through the flow regulating valve to ensure the normal operation of the equipment;

[0032] S3: Cooling water supply for a certain equipment;

[0033] The equipment in the No. 1 equipment combination requires cooling water, and the water supply pumps in the No. 1 water supply pump set work. The water supply pumps draw seawater from the No. 1 seawater tank and then pump it into the No. 1 equipment combination;

[0034] The seawater with a higher temperature after heat exchange in the No. 1 equipment combination enters the No. 2 seawater tank for heat exchange through the control of the No. 2 control valve. The No. 1 seawater tank discharges water and the No. 2 seawater tank takes in water. There is a liquid level difference between the two seawater tanks. The seawater in the No. 2 seawater tank is controlled by the connecting control valve and flows through the seawater tank connecting pipe of the ballast water tank at the bottom of the structure to the No. 2 seawater tank 6;

[0035] The seawater in the No. 2 seawater tank has a higher temperature. While passing through the bottom ballast water tank, it dissipates heat to the ballast water tank, and the ballast water tank dissipates heat to the ocean through the outer plate of the structure;

[0036] S4: Cross standby between the No. 1 seawater pump set and the No. 2 seawater pump set;

[0037] If a water pump in the No. 1 seawater pump set in the stern area fails, resulting in the equipment in the stern area being unable to obtain seawater and affecting normal operation, the pump in the bow area provides seawater to the No. 1 seawater tank in the stern area through the flow control valve to ensure the normal operation of the equipment in the stern area;

[0038] The equipment in the stern area operates normally. After the crew repairs the failure of the No. 1 seawater pump set, the seawater supply in the stern area is restored;

[0039] If a water pump in the No. 2 seawater pump set in the bow area fails, resulting in the equipment in the bow area being unable to obtain seawater and affecting normal operation, the pump in the stern area can provide seawater to the No. 2 seawater tank in the bow area through the flow control valve to ensure the normal operation of the equipment in the bow area;

[0040] The bow equipment is operating normally. After the crew repairs the fault of the second seawater pump assembly, the seawater supply to the bow will be restored.

[0041] The beneficial effects of the present invention are as follows:

[0042] The structure of the present invention is compact and reasonable, and it is convenient to operate. Through the mutual cooperation of each seawater tank, each seawater pump combination, each seawater pump assembly, each pipeline and each valve, it can conveniently achieve the low-power supply of seawater on the structure while maintaining the integrity of the outer plate of the structure and saving energy. It has good safety and reliability, greatly reduces costs, and improves work reliability.

[0043] At the same time, the present invention also has the following advantages:

[0044] (1) The present invention manages the seawater of the structure as a whole, manages the equipment in zones, and cross-backups, effectively improving the seawater utilization efficiency.

[0045] (2) The present invention makes full use of the characteristics of the structure itself, effectively improves the energy utilization efficiency, and is energy-saving and environment-friendly.

[0046] (3) The present invention is fully automatically controlled without manual intervention, improving the reliable stability of the system.

[0047] (4) The present invention keeps the outer plate of the structure intact, increases the structural strength, and improves the safety of the structure. BRIEF DESCRIPTION OF THE DRAWINGS

[0048] Figure 1 It is a distribution diagram of the four columns of the present invention.

[0049] Figure 2 It is an installation schematic diagram between two of the columns of the present invention.

[0050] Figure 3 It is a structural schematic diagram of the first seawater pump combination of the present invention.

[0051] Figure 4 It is a system schematic diagram of the present invention.

[0052] Figure 5 For Figure 4 Partial view.

[0053] Wherein: 1. A column; 2. No. 1 seawater tank; 3. B column; 4. D column; 5. C column; 6. No. 2 seawater tank; 7. No. 1 side discharge; 8. No. 1 control valve; 9. No. 1 water supply pump combination; 10. No. 1 flowmeter; 11. No. 2 control valve; 12. No. 1 equipment combination; 13. open deck; 14. flow regulating valve; 15. wet deck; 16. No. 1 seawater pump combination; 17. No. 2 seawater pump combination; 18. No. 3 control valve; 19. No. 2 equipment combination; 20. No. 2 flowmeter; 21. No. 2 water supply pump combination; 22. No. 4 control valve; 23. No. 2 side discharge; 24. No. 2 ballast tank combination; 25. seawater tank connecting pipe; 26. upper deck; 27. lower floating body; 28. No. 1 ballast tank combination; 29. designed draft; 30. control unit; 31. No. 1 seawater pump set; 32. No. 2 seawater pump set; 33. No. 1 manifold; 34. seawater connecting pipe; 35. connecting control valve; 36. No. 2 manifold;

[0054] 1601. Seawater pipe; 1602. Seawater casing; 1603. Seawater pump. Specific implementation mode

[0055] The specific implementation mode of the present invention will be described below with reference to the accompanying drawings.

[0056] Such as Figures 1-5As shown in the figure, the seawater integration system of the offshore structure in this embodiment includes four columns of the column-stabilized structure. Starting from the aft side of the structure, the columns of the structure are sequentially divided into Column A 1, Column B 3, Column C 5, and Column D 4. The integration system is installed between adjacent two columns or between columns in the opposite corner area. The installation structure of the integration system is as follows: It includes a No. 1 seawater tank 2 and a No. 2 seawater tank 6. The No. 1 seawater tank 2 is located in one of the columns, and the No. 2 seawater tank 6 is located in another column. The No. 1 seawater tank 2 and the No. 2 seawater tank 6 are connected by a seawater tank connecting pipe 25, and a connecting control valve 35 is installed on the seawater tank connecting pipe 25. At the bottom position corresponding to the area of the No. 1 seawater tank 2, a No. 1 ballast tank combination 28 is installed. At the bottom position corresponding to the area of the No. 2 seawater tank 6, a No. 2 ballast tank combination 24 is installed. The seawater tank connecting pipe 25 is cooled through the No. 1 ballast tank combination 28 and the No. 2 ballast tank combination 24. The No. 1 ballast tank combination 28 and the No. 2 ballast tank combination 24 are installed in the lower floating body 27. The top surface of the lower floating body 27 is the upper deck 26. Above the No. 1 seawater tank 2 and the No. 2 seawater tank 6 is the wet deck 15. Above the wet deck 15 is the open deck 13. The No. 1 seawater tank 2 is sequentially connected in series with a No. 1 water supply pump combination 9, a No. 1 flowmeter 10, and a No. 1 equipment combination 12 through pipelines. The No. 1 equipment combination 12 is connected to the No. 2 seawater tank 6, and a No. 2 control valve 11 is installed on the pipeline between the No. 1 equipment combination 12 and the No. 2 seawater tank 6. The No. 2 seawater tank 6 is sequentially connected in series with a No. 2 water supply pump combination 21, a No. 2 flowmeter 20, and a No. 2 equipment combination 19 through pipelines. The No. 2 equipment combination 19 is connected to the No. 1 seawater tank 2, and a No. 3 control valve 18 is installed on the pipeline between the No. 2 equipment combination 19 and the No. 1 seawater tank 2. The outlet of the No. 2 equipment combination 19 is connected to a No. 1 control valve 8 and a No. 1 side discharge 7 through a branch pipeline. The outlet of the No. 1 equipment combination 12 is connected to a No. 4 control valve 22 and a No. 2 side discharge 23 through a branch pipeline. It also includes a No. 1 seawater pump set 31 and a No. 2 seawater pump set 32. The No. 1 seawater pump set 31 is connected to the No. 1 seawater tank 2 through a No. 1 collecting pipe 33. The No. 2 seawater pump set 32 is connected to the No. 2 seawater tank 6 through a No. 2 collecting pipe 36. The No. 1 collecting pipe 33 and the No. 2 collecting pipe 36 are connected through a seawater connecting pipe 34, and a flow regulating valve 14 is installed on the seawater connecting pipe 34. It also includes a control unit 30, and the control unit 30 is electrically connected to each pump and each valve.

[0057] On the outer side of each column, a No. 1 seawater pump combination 16 or a No. 2 seawater pump combination 17 is provided, and the structures of the No. 1 seawater pump combination 16 and the No. 2 seawater pump combination 17 are the same.

[0058] The structure of the No. 1 seawater pump combination 16 is as follows: It includes seawater pumps 1603 each suspended on the outer side of the column. Each seawater pump 1603 is connected to the inside of the structure through a seawater pipe 1601, and a seawater sleeve 1602 is sleeved outside the seawater pump 1603 and the seawater pipe 1601.

[0059] All the seawater pumps outside the A-pillars 1 and C-pillars 5 are combined into the first seawater pump set 31.

[0060] All the seawater pumps outside the B-pillars 3 and D-pillars 4 are combined into the second seawater pump set 32.

[0061] A liquid level sensor and a temperature sensor are installed at the bottom of the first seawater tank 2.

[0062] A liquid level sensor and a temperature sensor are installed at the bottom of the second seawater tank 6.

[0063] The installation heights of both the first seawater tank 2 and the second seawater tank 6 are higher than the designed draft 29.

[0064] The pumps in the first water supply pump combination 9 and the second water supply pump combination 21 are all self-priming pumps.

[0065] The management method of the seawater integration system of the marine structure in this embodiment includes the following operation steps:

[0066] S1: Inject water into the first seawater tank 2 and the second seawater tank 6;

[0067] At the beginning of the system, there is no seawater in the first seawater tank 2. The first seawater pump set 31 is used to inject water into the first seawater tank 2. In order to inject water quickly, the second seawater pump set 32 is turned on, and the flow regulating valve 14 is controlled to open. The second seawater pump set 32 pumps seawater into the first seawater tank 2 together;

[0068] When the first seawater tank 2 is about to be filled with water, stop pumping water;

[0069] During the above process, the connection control valve 35 at the bottom of the first seawater tank 2 and the second seawater tank 6 is closed, and the two seawater tanks are independent of each other;

[0070] If water is injected into the second seawater tank 6, the second seawater pump set 32 injects water into the second seawater tank 6. In order to inject water quickly, the first seawater pump set 31 is turned on, and the flow regulating valve 14 is controlled to open. The first seawater pump set 31 pumps seawater into the second seawater tank 6 together;

[0071] When the second seawater tank 6 is about to be filled with water, stop pumping water;

[0072] During the above process, the connection control valve 35 at the bottom of the first seawater tank 2 and the second seawater tank 6 is closed, and the two seawater tanks are independent of each other;

[0073] S2: Inject ballast water into the ballast tank;

[0074] To ensure the attitude balance of the structure and reduce the instability of the structure caused by the torque imbalance of the seawater in the seawater tank, after injecting seawater into the No. 1 seawater tank 2 and the No. 2 seawater tank 6 respectively, the connecting control valve 35 is controlled to open;

[0075] The No. 1 seawater tank 2 is connected to the No. 2 seawater tank 6. Under the action of the external atmospheric pressure, the liquid levels in the two seawater tanks are balanced and at the same horizontal line, and the acting moments on the structure are symmetric with each other;

[0076] The seawater in the No. 1 seawater tank 2 flows into the ballast tank. When the liquid level in the No. 1 seawater tank 2 is low, the control unit 30 controls the No. 1 seawater pump assembly 31 to start according to the flow rate flowing into the ballast tank. The flow rate of the running seawater pump is greater than the flow rate flowing into the ballast tank, and the control valve on the No. 1 collecting pipe 33 is opened, and the seawater is pumped into the No. 1 seawater tank 2 through the No. 1 collecting pipe 33;

[0077] Due to the action of the liquid level difference, while the No. 1 seawater tank 2 replenishes water to the ballast tank, the seawater in the No. 2 seawater tank 6 flows through the connecting control valve 35 into the No. 1 seawater tank 2 to ensure the stability of water replenishment and the stability of the attitude of the structure;

[0078] If a water pump in the No. 1 seawater pump assembly 31 in the stern area fails, resulting in the inability of the equipment in the stern area to obtain seawater and affecting normal operation, the pump in the bow area can provide seawater to the equipment in the stern area through the flow regulating valve 14 to ensure the normal operation of the equipment;

[0079] S3: Cooling water supply for a certain equipment;

[0080] The equipment in the No. 1 equipment combination 12 needs cooling water. The water supply pumps in the No. 1 water supply pump combination 9 work. The water supply pumps draw seawater from the No. 1 seawater tank 2 and then pump it into the No. 1 equipment combination 12;

[0081] The seawater with a higher temperature after heat exchange from the No. 1 equipment combination 12 enters the No. 2 seawater tank 6 for heat exchange through the control of the No. 2 control valve 11. The No. 1 seawater tank 2 discharges water and the No. 2 seawater tank 6 takes in water. There is a liquid level difference between the liquid levels in the two seawater tanks. The seawater in the No. 2 seawater tank 6 is controlled by the connecting control valve 35 and flows through the seawater tank connecting pipe 25 of the ballast tank at the bottom of the structure to the No. 2 seawater tank 6;

[0082] The seawater in the No. 2 seawater tank 6 has a higher temperature. While passing through the bottom ballast tank, it dissipates the temperature into the ballast tank, and the ballast tank dissipates the heat to the ocean through the outer plate of the structure;

[0083] S4: Cross standby between the No. 1 seawater pump assembly 31 and the No. 2 seawater pump assembly 32;

[0084] If a pump in the No. 1 seawater pump assembly 31 in the stern area fails, causing the equipment in the stern area to be unable to obtain seawater and affecting normal operation, the pumps in the bow area supply seawater to the No. 1 seawater tank 2 in the stern area through flow control valves to ensure the normal operation of the equipment in the stern area;

[0085] After the equipment in the stern area operates normally and the crew repairs the failure of the No. 1 seawater pump assembly 31, the seawater supply to the stern is restored;

[0086] If a pump in the No. 2 seawater pump assembly 32 in the bow area fails, causing the equipment in the bow area to be unable to obtain seawater and affecting normal operation, the pumps in the stern area can supply seawater to the No. 2 seawater tank 6 in the bow area through flow control valves to ensure the normal operation of the equipment in the bow area;

[0087] After the equipment in the bow area operates normally and the crew repairs the failure of the No. 2 seawater pump assembly 32, the seawater supply to the bow is restored.

[0088] The specific structure and functions of the seawater integration system for the marine structure described in the present invention are as follows:

[0089] This embodiment is described by taking a column-stabilized structure as an example.

[0090] The equipment combination in this embodiment is the set of all water-using equipment on the structure.

[0091] According to its inherent structural form, the column-stabilized structure has four columns for connecting the upper box body and the lower box body.

[0092] Among them, the upper box body is the equipment room and workplace;

[0093] Among them, the lower box body is the ballast tank and the isolation tank.

[0094] As Figure 1 shown, starting from the rear of the starboard side of the structure in a counterclockwise order, the columns of the structure are named column A1, column B3, column C5, and column D4 in sequence.

[0095] A number of seawater pumps 1603 such as A1, A2,..., Am are suspended outside column A1 of the structure. They are installed below the water line to ensure that they can suck water at any time.

[0096] A number of seawater pumps 1603 such as A1, A2,..., Am pump seawater into the structure through their respective seawater pipes 1601 in sequence.

[0097] A number of seawater pumps 1603 such as A1, A2,..., Am are installed in the seawater casing 1602. The seawater casing 1602 can protect each seawater pump 1603 from being hit by external objects. At the same time, openings are made at the bottom so that seawater can enter the casing and submerge the internal seawater pumps 1603.

[0098] Outside the column 3 of structure B, seawater pumps 1603 such as B1, B2, …, Bm are suspended. They are installed below the water line to ensure that water can be pumped at any time.

[0099] Seawater pumps 1603 such as B1, B2, …, Bm pump seawater into the structure sequentially through their respective seawater pipes 1601.

[0100] Seawater pumps 1603 such as B1, B2, …, Bm are installed in seawater sleeves 1602. The seawater sleeves 1602 can protect each seawater pump 1603 from being impacted by external objects. At the same time, openings are made at the bottom so that seawater can enter the sleeves and submerge the internal seawater pumps 1603.

[0101] Outside the column 5 of structure C, seawater pumps 1603 such as C1, C2, …, Cm are suspended. They are installed below the water line to ensure that water can be pumped at any time.

[0102] Seawater pumps 1603 such as C1, C2, …, Cm pump seawater into the structure sequentially through their respective seawater pipes 1601.

[0103] Seawater pumps 1603 such as C1, C2, …, Cm are installed in seawater sleeves 1602. The seawater sleeves 1602 can protect each seawater pump 1603 from being impacted by external objects. At the same time, openings are made at the bottom so that seawater can enter the sleeves and submerge the internal seawater pumps 1603.

[0104] Outside the column of structure D, seawater pumps 1603 such as D1, D2, …, Dm are suspended. They are installed below the water line to ensure that water can be pumped at any time.

[0105] Seawater pumps 1603 such as D1, D2, …, Dm pump seawater into the structure sequentially through their respective seawater pipes 1601.

[0106] Seawater pumps 1603 such as D1, D2, …, Dm are installed in seawater sleeves 1602. The seawater sleeves 1602 can protect each seawater pump 1603 from being impacted by external objects. At the same time, openings are made at the bottom so that seawater can enter the sleeves and submerge the internal seawater pumps 1603.

[0107] Seawater pumps 1603 such as A1, A2, …, Am outside the column 1 of structure A and seawater pumps 1603 such as C1, C2, …, Cm outside the column 5 of structure C in the diagonal area are combined into a first seawater pump set 31.

[0108] In this set, the A1 seawater pump is connected to the first seawater manifold through the A1 control valve, the A2 seawater pump is connected to the first seawater manifold through the A2 control valve, …, the Am seawater pump is connected to the first seawater manifold through the Am control valve, the B1 seawater pump is connected to the first seawater manifold through the B1 control valve, the B2 seawater pump is connected to the first seawater manifold through the B2 control valve, …, the Bm seawater pump is connected to the first seawater manifold through the Bm control valve.

[0109] Seawater pumps such as A1, A2, …, Am, C1, C2, …, Cm are all connected in parallel to the first manifold 33.

[0110] Seawater pumps such as A1, A2, …, Am, C1, C2, …, Cm all have control cables connected to the control unit 30.

[0111] The A1 control valve, A2 control valve, …, Am control valve, C1 control valve, C2 control valve, …, Cm control valve all have control cables connected to the control unit 30.

[0112] Combine the seawater pumps such as B1, B2, …, Bs outside the B column 3 and the seawater pumps such as D1, D2, …, Ds outside the D column in the diagonal area into the second seawater pump set 32.

[0113] In this set, the B1 seawater pump is connected to the second seawater manifold through the B1 control valve, the B2 seawater pump is connected to the second seawater manifold through the B2 control valve, …, the Bs seawater pump is connected to the second seawater manifold through the Bs control valve, the D1 seawater pump is connected to the second seawater manifold through the D1 control valve, the D2 seawater pump is connected to the second seawater manifold through the D2 control valve, …, the Ds seawater pump is connected to the second seawater manifold through the Ds control valve.

[0114] Seawater pumps such as B1, B2, …, Bs, D1, D2, …, Ds are all connected in parallel to the second manifold 36.

[0115] Seawater pumps such as B1, B2, …, Bs, D1, D2, …, Ds all have control cables connected to the control unit 30.

[0116] The B1 control valve, B2 control valve, …, Bs control valve, D1 control valve, D2 control valve, …, Ds control valve all have control cables connected to the control unit 30.

[0117] The first manifold 33 and the second manifold 36 are connected through the flow regulating valve 14, and the flow regulating valve 14 is connected to the control unit 30 through a control cable.

[0118] The control unit 30 integrates the signals in the system, controls the corresponding equipment, and at the same time intervenes in the start signals of each water-using equipment on the ship's switchboard.

[0119] The No. 1 seawater tank 2 is located in a certain column and is above the waterline of the structure.

[0120] A liquid level sensor is installed at the bottom of the No. 1 seawater tank 2 and is connected to the control unit 30 through a control cable.

[0121] A temperature sensor is installed at the bottom of the No. 1 seawater tank 2 and is connected to the control unit 30 through a control cable.

[0122] The No. 2 seawater tank 6 is located in a certain diagonal column and is above the waterline of the structure.

[0123] A liquid level sensor is installed at the bottom of the No. 2 seawater tank 6 and is connected to the control unit 30 through a control cable.

[0124] A temperature sensor is installed at the bottom of the No. 2 seawater tank 6 and is connected to the control unit 30 through a control cable.

[0125] The No. 1 seawater tank 2 and the No. 2 seawater tank 6 are connected by a seawater tank connecting pipe 25.

[0126] The seawater tank connecting pipe 25 passes through the ballast water tank at the bottom of the lower floating body 27, and the seawater in the pipe can be cooled through the ballast water tank.

[0127] A connection control valve 35 is arranged on the seawater tank connecting pipe 25, which is responsible for the connection and closing of the seawater tank connecting pipe 25.

[0128] The connection control valve 35 is controlled by the control unit 30 through a control cable.

[0129] The No. 1 equipment combination 12 is a set of water-using equipment in the area where the No. 1 seawater tank 2 is located.

[0130] The No. 2 equipment combination 19 is a set of water-using equipment in the area where the No. 2 seawater tank 6 is located.

[0131] The same equipment on the structure (such as multiple generator sets, seawater desalination devices, fire pumps, etc.) should be separately and evenly arranged in the No. 1 equipment combination 12 at the stern and the No. 2 equipment combination 19 at the bow, ensuring that when one side of the system fails, there are still equipment on the other side of the structure that can be put into use, improving the operation safety of the structure.

[0132] The No. 1 ballast tank combination 28 is a set of ballast water tanks in the area where the No. 1 seawater tank 2 is located and is located in the lower box body of the structure.

[0133] The No. 2 ballast tank combination 24 is a set of ballast water tanks in the area where the No. 2 seawater tank 6 is located and is located in the lower box body of the structure.

[0134] The No. 1 seawater tank 2 is connected to each ballast tank in the No. 1 ballast water tank assembly 28 in the lower box body through pipes and the control valves of the No. 1 ballast water tank assembly 28 (the control valves corresponding to the ballast tanks in each No. 1 ballast tank assembly 28).

[0135] The No. 2 seawater tank 6 is connected to each ballast tank in the No. 2 ballast water tank assembly 24 in the lower box body through pipes and the control valves of the No. 2 ballast water tank assembly 24 (the control valves corresponding to the ballast tanks in each No. 2 ballast tank assembly 24).

[0136] The No. 1 water supply pump assembly 9 is installed in the upper box body of the structure, at a position higher than the No. 1 seawater tank 2, and is a self-priming pump.

[0137] The No. 2 water supply pump assembly 21 is installed in the upper box body of the structure, at a position higher than the No. 2 seawater tank 6, and is a self-priming pump.

[0138] The water pumps in the No. 1 water supply pump assembly 9 supply the seawater in the No. 1 seawater tank 2 to the corresponding devices in the No. 1 equipment assembly 12 respectively.

[0139] The seawater passing through the No. 1 equipment assembly 12 can flow into the No. 2 seawater tank 12 under the control of the No. 2 control valve 11, or can be discharged overboard under the control of the No. 4 control valve 22.

[0140] The water pumps in the No. 2 water supply pump assembly 21 supply the seawater in the No. 2 seawater tank 6 to the corresponding devices in the No. 2 equipment assembly 19 respectively.

[0141] The seawater passing through the No. 2 equipment assembly 19 can flow into the No. 1 seawater tank 2 under the control of the No. 3 control valve 18, or can be discharged overboard under the control of the No. 1 control valve 8.

[0142] Each control valve is connected to the control unit 30 through a control cable and receives the control of the control unit 30.

[0143] During the actual working process:

[0144] The structural area where the A column 1 and the B column 3 are located is defined as the stern part of the structure.

[0145] The structural area where the C column 5 and the D column 4 are located is defined as the bow part of the structure.

[0146] The No. 1 seawater pump set 31, the No. 1 ballast tank assembly 28, the No. 1 water supply pump assembly 9, and the No. 1 equipment assembly 12 are all located in the stern area of the structure.

[0147] The No. 2 seawater pump set 32, the No. 2 ballast tank assembly 24, the No. 2 water supply pump assembly 21, and the No. 2 equipment assembly 19 are all located in the bow area of the structure.

[0148] In the first seawater pump set 31, the flow rates of the pumps are A1, A2, …, Am, C1, C2, …, Cm respectively, and the maximum seawater flow rate required by a single device in the first equipment combination 12 is q1. According to the ratio of the maximum flow rate q1 to the total flow rate of the first seawater pump set 31, the combination of each seawater pump 1603 in the first seawater pump set 31 is determined.

[0149] (1) If It indicates that the proportion of the seawater flow rate required by a device in the total flow rate of the first seawater pump set 31 is relatively large, and it is the device with the largest water consumption. The flow rates of the seawater pumps 1603 in the first seawater pump set 31 are:

[0150] A1 = q1,

[0151] (2) If It indicates that the proportion of the seawater flow rate required by the device in the total flow rate of the first seawater pump set 31 is relatively small.

[0152] The flow rates of the seawater pumps in the first seawater pump set 31 are:

[0153]

[0154] Similarly, in the second seawater pump set 32, the flow rates of the pumps are B1, B2, …, Bs, D1, D2, …, Ds respectively, and the maximum seawater flow rate required by a single device in the second equipment combination 20 is q2. According to the ratio of the maximum flow rate q2 to the total flow rate of the second seawater pump set 32, the combination of each seawater pump 1603 in the second seawater pump set 32 is determined.

[0155] (3) If It indicates that the proportion of the seawater flow rate required by a device in the total flow rate of the second seawater pump set 32 is relatively large, and it is the device with the largest water consumption. The flow rate of the seawater pump 1603 in the second seawater pump set 32 is B1 = q2.

[0156] (4) If It indicates that the proportion of the seawater flow rate required by the device in the total flow rate of the second seawater pump set 32 is relatively small.

[0157] The flow rates of the seawater pumps in the second seawater pump set are:

[0158]

[0159] During the actual operation process:

[0160] (1) Inject water into the first seawater tank 2 / the second seawater tank 6;

[0161] When the system starts, there is no seawater in the No. 1 seawater tank 2. The liquid level sensor installed at the bottom of the No. 1 seawater tank 2 transmits a low liquid level signal to the control unit 30. The control unit 30 controls the seawater pump 1603 in the No. 1 seawater pump assembly 31 to inject water into the No. 1 seawater tank 2. To quickly fill the water, the control unit 30 controls the No. 2 seawater pump assembly 32 to start and controls the flow regulating valve 14 to open. Each seawater pump 1603 in the No. 2 seawater pump assembly 32 pumps seawater into the No. 1 seawater tank 2 together.

[0162] When the No. 1 seawater tank 2 is about to be filled with water, the liquid level sensor at its bottom transmits a high level signal to the control unit, and the control unit stops the operation of each seawater pump.

[0163] During this process, the connecting control valve 35 at the bottom of the No. 1 seawater tank 2 and the No. 2 seawater tank 6 is closed, and the two seawater tanks are independent of each other.

[0164] If water is to be injected into the No. 2 seawater tank 6, the liquid level sensor installed at the bottom of the No. 2 seawater tank 6 transmits a low liquid level signal to the control unit 30. The control unit 30 controls the seawater pump 1603 in the No. 2 seawater pump assembly 32 to inject water into the No. 2 seawater tank 6. To quickly fill the water, the control unit 30 controls the No. 1 seawater pump assembly 31 to start and controls the flow regulating valve 14 to open. Each seawater pump 1603 in the No. 1 seawater pump assembly 31 pumps seawater into the No. 2 seawater tank 6 together.

[0165] When the No. 2 seawater tank 6 is about to be filled with water, the liquid level sensor at its bottom transmits a high level signal to the control unit 30, and the control unit 30 stops the operation of each seawater pump 1603.

[0166] During this process, the connecting control valve 35 at the bottom of the No. 1 seawater tank 2 and the No. 2 seawater tank 6 is closed, and the two seawater tanks are independent of each other.

[0167] (2) Inject ballast water into the ballast water tank;

[0168] To ensure the attitude balance of the structure and reduce the torque imbalance of the seawater in the seawater tank on the structure, resulting in the instability of the structure, after seawater is respectively injected into the No. 1 seawater tank 2 and the No. 2 seawater tank 6, the connecting control valve 35 is controlled to open.

[0169] The No. 1 seawater tank 2 is connected to the No. 2 seawater tank 6. Under the action of the external atmospheric pressure, the liquid levels in the two seawater tanks are balanced and at the same horizontal line, and the acting torques on the structure are symmetric with each other.

[0170] If it is determined according to the stability attitude of the structure to inject ballast water into a certain ballast water tank in the No. 1 ballast tank assembly 28, the corresponding valve in the control valve of the No. 1 ballast tank assembly 28 can be remotely opened, and the seawater flows into the ballast water tank from the No. 1 seawater tank 2 under the action of gravity.

[0171] Seawater in the No. 1 seawater tank 2 flows into the ballast tank, and its liquid level sensor transmits the liquid level in the No. 1 seawater tank 2 to the control unit 30 in real time. When the liquid level in the No. 1 seawater tank 2 is low, the control unit 30 controls the start of several seawater pumps 1603 in the No. 1 seawater pump assembly 31 according to the flow rate q 压 flowing to the ballast tank, and the flow rate Q 压 (A1, A2,..., C1, C2) of the operating seawater pumps is greater than the flow rate q 压 flowing to the ballast tank, and opens the control valve on the No. 1 manifold 33. The seawater is pumped into the No. 1 seawater tank 2 through the No. 1 manifold 33.

[0172] Due to the effect of the liquid level difference, while the No. 1 seawater tank 2 replenishes water to the ballast tank, seawater in the No. 2 seawater tank 6 flows to the No. 1 seawater tank 2 through the connecting control valve 35, ensuring the stability of water replenishment and the stability of the structural stability attitude.

[0173] If a water pump in the No. 1 seawater pump assembly 31 in the stern area fails, resulting in the inability of the equipment in the stern area to obtain seawater and affecting normal operation, the seawater pump in the bow area can provide seawater to the equipment in the stern area through the flow control valve 14 to ensure the normal operation of the equipment.

[0174] The replenishment of water from the No. 2 seawater tank 6 to the ballast tank in the No. 2 ballast tank combination 24 also follows the same control logic and process.

[0175] After the operating seawater pump combination (A1, A2,..., C1, C2) has worked for a certain period of time, in order to ensure that it can get sufficient rest, after logical judgment by the control unit 30, another seawater pump combination (Am, Am - 1,..., Cm - 1, Cm) with the same flow rate is started to replace (A1, A2,..., C1, C2).

[0176] Through the data input in the preset control program, when the ballast tank is filled with seawater after a certain period of time, the control unit 30 controls each seawater pump 1603 to stop running.

[0177] (3) Cooling water supply for a certain equipment;

[0178] As a key water system on the structure, cooling water is an important system to maintain the safe operation of the structure. The application management of this method in the cooling water system can effectively save energy and protect the environment.

[0179] Taking the water use of the stern equipment as an example, it is as follows.

[0180] The equipment in the No. 1 equipment combination 12 requires cooling water for operation. The equipment operation signal is sent to the control unit 30 through the switchboard. The control unit 30 starts the water supply pump in the No. 1 water supply pump combination 9 corresponding to the equipment. The water supply pump draws seawater from the No. 1 seawater tank 2 and then pumps it into the No. 1 equipment combination 12.

[0181] The seawater temperature is relatively high after heat exchange in the first equipment combination 12. It enters the second seawater tank 6 for heat exchange under the control of the first control valve 11. The seawater in the first seawater tank 2 flows out, and the seawater in the second seawater tank 6 flows in. There is a liquid level difference between the two seawater tanks. The seawater in the second seawater tank 6 flows through the seawater tank connecting pipe 25 at the bottom of the structure's ballast tank to the second seawater tank 6 under the control of the connecting control valve 35.

[0182] The seawater in the second seawater tank 6 has a relatively high temperature. While passing through the bottom ballast tank, it can dissipate the temperature to the ballast tank, and the ballast tank dissipates the heat to the ocean through the outer plate of the structure.

[0183] The equipment, the equipment water supply pump, the first seawater tank 2, the first control valve 11, the second seawater tank 6, and the connecting pipe form a closed gravity flow system, which can complete the cooling requirements of the equipment without continuously pumping seawater from the outside, saving energy consumption and being more environmentally friendly.

[0184] In the closed gravity flow system, the temperature sensor in the first seawater tank 2 transmits the temperature to the control unit 30 in real time. When many devices are running and the cooling demand increases, the connecting pipe in the bottom ballast tank cannot transfer the heat of the device to the outside seawater in time, and the temperature of the first seawater tank 2 gradually rises. When the temperature rises to the set value, the control system 30 controls the first control valve 11 to close and the second control valve 18 to open, and the high-temperature seawater coming out of the device is discharged overboard through the second control valve 18.

[0185] If the device with the largest water consumption starts, its water consumption then the control unit 30 controls the A1 seawater pump to start. After the A1 seawater pump works for a certain period of time, in order to ensure that it can get enough rest, after logical judgment by the control unit 30,

[0186] start another seawater pump combination (Am, Am - 1,..., Cm - 1, Cm) with the same flow rate, and at the same time start the bow seawater pump (Bm, Bm - 1,..., Dm - 1, Dm), so that the flow rate of the seawater pump combination is greater than the flow rate of A1, that is

[0187] A m +A m-1 +...+C m-1 +C m +B m +B m-1 +...+D m-1 +D m ≥A1

[0188] While starting the bow seawater pump assembly, the control unit 30 controls the flow regulating valve to open, so that the seawater provided by the bow seawater pump assembly can be smoothly supplied to the stern No. 1 collecting pipe 33.

[0189] At this time, the seawater pump assembly meets the operating requirements of the equipment.

[0190] If the equipment with the largest water consumption starts, its water consumption Then the control unit controls the start of some seawater pumps in the No. 1 seawater pump assembly 31 according to the equipment cooling demand flow rate q 冷 , and the flow rate Q of the operating seawater pumps 冷 (A1, A2,..., C1, C2) is greater than the equipment cooling demand flow rate q 冷 .

[0191] After the operating seawater pump assembly (A1, A2,..., C1, C2) has worked for a certain period of time, in order to ensure that it can get enough rest, after logical judgment by the control unit 30, another seawater pump assembly (Am, Am-1,..., Cm-1, Cm) with the same flow rate is started to replace (A1, A2,..., C1, C2).

[0192] The water supply for the bow equipment also follows the same control logic and process.

[0193] (4) The No. 1 seawater pump assembly 31 and the No. 2 seawater pump assembly 32 are cross-redundant;

[0194] If a water pump in the No. 1 seawater pump assembly 31 in the stern area fails, resulting in the inability of the equipment in the stern area to obtain seawater and affecting normal operation, the seawater pump 1603 in the bow area can provide seawater to the No. 1 seawater tank 2 in the stern area through the flow control valve to ensure the normal operation of the equipment in the stern area.

[0195] The seawater pumps (A1, A2,..., C1, C2) in the No. 1 seawater pump assembly 31 are operating normally. If the No. 1 seawater pump assembly 31 fails and cannot inject enough seawater into the No. 1 seawater tank 2. The water level in the No. 1 seawater tank 2 gradually decreases. Due to the effect of the seawater connection pipe 25, the water level in the No. 2 seawater tank 6 also decreases. When the liquid level transmitted by the No. 1 liquid level sensor to the control unit 30 is low, the control unit 30 matches a suitable seawater pump combination in the No. 2 seawater pump assembly 32 and sequentially starts the bow seawater pump combination (B1, B2,..., D1, D2) with the same flow rate to replace the stern (A1, A2,..., C1, C2), opens the flow control valve, and provides seawater from the bow to the stern No. 1 seawater tank.

[0196] The equipment in the stern area operates normally. After the crew repairs the failure of the No. 1 seawater pump assembly 31, the seawater supply to the stern area is restored.

[0197] If a water pump in the No. 2 seawater pump set 32 in the bow area fails, resulting in the equipment in the bow area being unable to obtain seawater and affecting normal operation, the seawater pump in the stern area can provide seawater to the No. 1 seawater tank in the bow area through a flow control valve to ensure the normal operation of the equipment in the bow area.

[0198] The seawater pumps (B1, B2,..., D1, D2) in the No. 2 seawater pump set 32 are operating normally. If the No. 2 seawater pump set fails, it is unable to inject enough seawater into the No. 2 seawater tank 2. The water level in the No. 2 seawater tank 2 gradually decreases. Due to the function of the seawater connecting pipe 25, the water level in the No. 1 seawater tank 2 also decreases accordingly. When the liquid level transmitted by the No. 2 liquid level sensor to the control unit is relatively low, the control unit 30 matches a suitable seawater pump combination in the No. 1 seawater pump set 31.

[0199] And successively start the seawater pump combinations (A1, A2,..., C1, C2) with the same flow rate in the stern area to replace the bow area (B1, B2,..., D1, D2), open the flow control valve, and provide seawater from the stern area to the No. 2 seawater tank in the bow area.

[0200] The equipment in the bow area operates normally. After the crew repairs the failure of the No. 2 seawater pump set 32, the seawater supply in the bow area is restored.

[0201] Through the above method, the seawater of the structure can be overall managed, the equipment can be partitioned and managed, and cross-backup can be carried out, effectively improving the seawater utilization efficiency.

[0202] The above description is an explanation of the present invention, not a limitation of the invention. The scope defined by the present invention is referred to the claims. Within the protection scope of the present invention, any form of modification can be made.

Claims

1. An integrated seawater system for marine structures, characterized in that: It includes four columns of a column-stabilized structure. Starting from the quarter aft of the structure, the columns of the structure are sequentially divided into Column A (1), Column B (3), Column C (5), and Column D (4). An integrated system is installed between adjacent two columns or between columns in opposite corner areas. The installation structure of the integrated system is as follows: It includes a No. 1 seawater tank (2) and a No. 2 seawater tank (6). The No. 1 seawater tank (2) is located in one of the columns, and the No. 2 seawater tank (6) is located in another column. The No. 1 seawater tank (2) and the No. 2 seawater tank (6) are connected by a seawater tank connecting pipe (25), and a connecting control valve (35) is installed on the seawater tank connecting pipe (25); a No. 1 ballast tank combination (28) is installed at the bottom position corresponding to the area of the No. 1 seawater tank (2), and a No. 2 ballast tank combination (24) is installed at the bottom position corresponding to the area of the No. 2 seawater tank (6). The seawater tank connecting pipe (25) passes through the No. 1 ballast tank combination (28) and the No. 2 ballast tank combination (24) for cooling. The No. 1 ballast tank combination (28) and the No. 2 ballast tank combination (24) are installed in the lower floating body (27). The top surface of the lower floating body (27) is the upper deck (26). Above the No. 1 seawater tank (2) and the No. 2 seawater tank (6) is the wet deck (15), and above the wet deck (15) is the open deck (13). The No. 1 seawater tank (2) is sequentially connected in series with a No. 1 water supply pump combination (9), a No. 1 flowmeter (10), and a No. 1 equipment combination (12) through pipelines. The No. 1 equipment combination (12) is connected to the No. 2 seawater tank (6), and a No. 2 control valve (11) is installed on the pipeline between the No. 1 equipment combination (12) and the No. 2 seawater tank (6); the No. 2 seawater tank (6) is sequentially connected in series with a No. 2 water supply pump combination (21), a No. 2 flowmeter (20), and a No. 2 equipment combination (19) through pipelines. The No. 2 equipment combination (19) is connected to the No. 1 seawater tank (2), and a No. 3 control valve (18) is installed on the pipeline between the No. 2 equipment combination (19) and the No. 1 seawater tank (2). The outlet of the No. 2 equipment combination (19) is connected to a No. 1 control valve (8) and a No. 1 side discharge (7) through a branch pipeline. The outlet of the No. 1 equipment combination (12) is connected to a No. 4 control valve (22) and a No. 2 side discharge (23) through a branch pipeline; It also includes a No. 1 seawater pump set (31) and a No. 2 seawater pump set (32). The No. 1 seawater pump set (31) is connected to the No. 1 seawater tank (2) through a No. 1 collecting pipe (33). The No. 2 seawater pump set (32) is connected to the No. 2 seawater tank (6) through a No. 2 collecting pipe (36). The No. 1 collecting pipe (33) and the No. 2 collecting pipe (36) are connected through a seawater connecting pipe (34), and a flow regulating valve (14) is installed on the seawater connecting pipe (34); It also includes a control unit (30), and the control unit (30) is electrically connected to each pump and each valve by electrical signals.

2. The integrated seawater system for marine structures according to claim 1, characterized in that: On the outside of each column, there is a No. 1 seawater pump combination (16) or a No. 2 seawater pump combination (17), and the structures of the No. 1 seawater pump combination (16) and the No. 2 seawater pump combination (17) are the same.

3. The integrated seawater system for marine structures according to claim 2, characterized in that: The structure of the No. 1 seawater pump assembly (16) is as follows: It includes seawater pumps (1603) each suspended outside the columns. Each seawater pump (1603) is connected to the interior of the structure through a seawater pipe (1601), and a seawater sleeve (1602) is sleeved outside the seawater pump (1603) and the seawater pipe (1601).

4. The integrated seawater system for marine structures according to claim 1, characterized in that: The seawater pumps outside all A columns (1) and C columns (5) are combined into a No. 1 seawater pump set (31).

5. The integrated seawater system for marine structures according to claim 1, characterized in that: The seawater pumps outside all B columns (3) and D columns (4) are combined into a No. 2 seawater pump set (32).

6. The integrated seawater system for marine structures according to claim 1, characterized in that: A liquid level sensor and a temperature sensor are installed at the bottom of the No. 1 seawater tank (2).

7. The integrated seawater system for marine structures according to claim 1, characterized in that: A liquid level sensor and a temperature sensor are installed at the bottom of the No. 2 seawater tank (6).

8. The integrated seawater system for marine structures according to claim 1, characterized in that: The installation heights of the No. 1 seawater tank (2) and the No. 2 seawater tank (6) are both higher than the designed draft (29).

9. The integrated seawater system for marine structures according to claim 1, characterized in that: The pumps in the No. 1 water supply pump assembly (9) and the No. 2 water supply pump assembly (21) are all self-priming pumps.

10. A management method using the integrated seawater system for marine structures according to claim 1, characterized in that: It includes the following operation steps: S1: Inject water into the No. 1 seawater tank (2) and the No. 2 seawater tank (6); At the beginning of the system, there is no seawater in the No. 1 seawater tank (2). Use the No. 1 seawater pump set (31) to inject water into the No. 1 seawater tank (2). To inject water quickly, the No. 2 seawater pump set (32) is started, and the flow regulating valve (14) is controlled to open. The No. 2 seawater pump set (32) pumps seawater into the No. 1 seawater tank (2) together; When the No. 1 seawater tank (2) is about to be filled with water, stop pumping water; If injecting water into the No. 2 seawater tank (6), the No. 2 seawater pump set (32) injects water into the No. 2 seawater tank (6). To inject water quickly, the No. 1 seawater pump set (31) is started, and the flow regulating valve (14) is controlled to open. The No. 1 seawater pump set (31) pumps seawater into the No. 2 seawater tank (6) together; When the No. 2 seawater tank (6) is about to be filled with water, stop pumping water; In step S1, the connecting control valve (35) at the bottom of the No. 1 seawater tank (2) and the No. 2 seawater tank (6) is closed, and the two seawater tanks are independent of each other; S2: Inject ballast water into the ballast tank; To ensure the attitude balance of the structure and reduce the torque imbalance of the seawater in the seawater tank causing the structure to become unstable, after injecting seawater into the No. 1 seawater tank (2) and the No. 2 seawater tank (6) respectively, control the connecting control valve (35) to open; The No. 1 seawater tank (2) is connected to the No. 2 seawater tank (6). Under the action of the external atmospheric pressure, the liquid levels in the two seawater tanks are balanced and at the same horizontal line, and the acting torques on the structure are symmetrical to each other; The seawater in the No. 1 seawater tank (2) flows into the ballast tank. When the liquid level of the No. 1 seawater tank (2) is relatively low, the control unit (30) controls the No. 1 seawater pump set (31) to start according to the flow rate flowing into the ballast tank. The flow rate of the running seawater pump is greater than the flow rate flowing into the ballast tank, and the control valve on the No. 1 collecting pipe (33) is opened. Seawater is pumped into the No. 1 seawater tank (2) through the No. 1 collecting pipe (33); Due to the effect of the liquid level difference, while the No. 1 seawater tank (2) replenishes water into the ballast water tank, the seawater in the No. 2 seawater tank (6) flows into the No. 1 seawater tank (2) through the connection control valve (35), ensuring the stability of water replenishment and the stability of the structural stability attitude; If a water pump in the No. 1 seawater pump assembly (31) in the stern area fails, resulting in the inability of the equipment in the stern area to obtain seawater and affecting normal operation, the pump in the bow area can provide seawater to the equipment in the stern area through the flow regulating valve (14) to ensure the normal operation of the equipment; S3: Cooling water supply for a certain equipment; The equipment in the No. 1 equipment combination (12) requires cooling water, and the water supply pumps in the No. 1 water supply pump combination (9) work. The water supply pumps draw seawater from the No. 1 seawater tank (2) and then pump it into the No. 1 equipment combination (12); The seawater with a higher temperature after heat exchange in the No. 1 equipment combination (12) enters the No. 2 seawater tank (6) for heat exchange through the control of the No. 2 control valve (11). The No. 1 seawater tank (2) discharges water and the No. 2 seawater tank (6) takes in water. There is a liquid level difference between the two seawater tanks. The seawater in the No. 2 seawater tank (6) flows through the seawater tank connection pipe (25) of the ballast water tank at the bottom of the structure to the No. 2 seawater tank 6 through the control of the connection control valve (35); The seawater in the No. 2 seawater tank (6) has a higher temperature. While passing through the bottom ballast water tank, it dissipates heat to the ballast water tank, and the ballast water tank dissipates heat to the ocean through the outer plate of the structure; S4: The No. 1 seawater pump assembly (31) and the No. 2 seawater pump assembly (32) are cross-redundant; If a water pump in the No. 1 seawater pump assembly (31) in the stern area fails, resulting in the inability of the equipment in the stern area to obtain seawater and affecting normal operation, the pump in the bow area provides seawater to the No. 1 seawater tank (2) in the stern area through the flow control valve to ensure the normal operation of the equipment in the stern area; The equipment in the stern area operates normally. After the crew repairs the failure of the No. 1 seawater pump assembly (31), the seawater supply in the stern area is restored; If a water pump in the No. 2 seawater pump assembly (32) in the bow area fails, resulting in the inability of the equipment in the bow area to obtain seawater and affecting normal operation, the pump in the stern area can provide seawater to the No. 2 seawater tank (6) in the bow area through the flow control valve to ensure the normal operation of the equipment in the bow area; The equipment in the bow area operates normally. After the crew repairs the failure of the No. 2 seawater pump assembly (32), the seawater supply in the bow area is restored.

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