Double-head passenger ship fresh water system and double-head passenger ship fresh water tank filling, adjusting and cleaning method

Abstract

The invention provides a double-head passenger ship fresh water system and a double-head passenger ship fresh water tank filling, allocating and cleaning method. In the system, two filling stations of a first ship bow and a second ship bow are communicated with four mutually independent fresh water tanks through pipelines. When the first bow end of the double-head passenger ship arrives at a port, fresh water needs to be injected into three fresh water tanks, and when the other fresh water tank needs to be cleaned, water is injected into the four fresh water tanks at the same time, chemicals are added into one fresh water tank at the same time, pipelines are correspondingly injected after chemicals are added, water tank cleaning is conducted on the fresh water tanks, and after cleaning, the other fresh water tank needs to be cleaned. Opening a drainage pipeline of the cleaned fresh water tank, and starting a fresh water delivery pump to empty and drain into the sea. Therefore, when one fresh water tank is cleaned, the other three fresh water tanks can be continuously filled with fresh water, so that the simultaneous operation of fresh water filling and fresh water tank cleaning is realized. After fresh water filling and fresh water tank cleaning are finished, the fresh water pump can be immediately started for drainage, so that the working efficiency is greatly improved.

Description

Technical Field

[0001] The invention belongs to the technical field of ship fresh water systems, and in particular relates to a fresh water system for a double-ended passenger ship and a method for filling, transferring and cleaning a fresh water tank of the double-ended passenger ship. Background Art

[0002] At present, the fresh water tank of a ship is basically filled or transferred in a single task, and there is no design for the simultaneous filling, transfer, cleaning and discharge of the fresh water tanks arranged in front and behind. The filling, cleaning or transfer of the fresh water tanks of conventional passenger ships cannot meet the requirements of fast filling while not hindering the cleaning and transfer of the fresh water tanks.

[0003] Therefore, the current system design causes the ship to dock for a long time, affecting the ship's operating cycle. Summary of the invention

[0004] The purpose of the present invention is to provide a double-ended passenger ship fresh water system and a double-ended passenger ship fresh water tank filling, allocation, cleaning and discharge method capable of simultaneously performing the work of filling, allocating, cleaning and discharge of the ship's fresh water tank

[0005] A first aspect of the present invention provides a double-ended passenger ship fresh water system, comprising a first bow and a second bow located at both ends of the hull, characterized in that:

[0006] The first bow includes a first fresh water tank, a second fresh water tank, a first filling station and a first fresh water transfer pump;

[0007] The water outlet of the first filling station is connected to the first main filling pipeline; the water inlet of the first fresh water tank is connected to the first filling pipeline, the water inlet of the second fresh water tank is connected to the second filling pipeline, and the first filling pipeline and the second filling pipeline are both connected to the first main filling pipeline;

[0008] The drain outlet of the first fresh water tank is connected to the first drain pipeline, the drain outlet of the second fresh water tank is connected to the second drain pipeline, the first drain pipeline and the second drain pipeline are both connected to the first main drain pipeline, the first main drain pipeline is provided with a first stop valve, and the water inlet and outlet of the first fresh water delivery pump are both connected to the first main drain pipeline and connected to the front and rear sides of the first stop valve;

[0009] The second bow includes the third fresh water tank, the fourth fresh water tank, the second filling station and the second fresh water transfer pump;

[0010] The water outlet of the second filling station is connected to the second main filling pipeline; the water inlet of the third fresh water tank is connected to the third filling pipeline, the water inlet of the fourth fresh water tank is connected to the fourth filling pipeline, and the third filling pipeline and the fourth filling pipeline are both connected to the second main filling pipeline;

[0011] The drain outlet of the third fresh water tank is connected to the third drain pipeline, the drain outlet of the fourth fresh water tank is connected to the fourth drain pipeline, the third drain pipeline and the fourth drain pipeline are both connected to the second main drain pipeline, the second main drain pipeline is provided with a second stop valve, the water inlet and outlet of the second fresh water delivery pump are both connected to the second main drain pipeline and connected to the front and rear sides of the second stop valve; the first main filling pipeline is connected to the second main filling pipeline;

[0012] The first fresh water tank, the second fresh water tank, the third fresh water tank and the fourth fresh water tank are all connected to the dosing equipment.

[0013] Optionally, the ends of the first main drainage pipeline and the second main drainage pipeline are butt-jointed and connected to each other;

[0014] The end of the first main filling pipeline is connected to the first main drainage pipeline and to the output side of the first fresh water delivery pump;

[0015] The end of the second main filling pipeline is connected to the second main drainage pipeline and to the output side of the second fresh water delivery pump.

[0016] Optionally, electric butterfly valves are provided at the ends of the first main filling pipeline and the second main filling pipeline.

[0017] Optionally, a third stop valve is provided on the water inlet side of the first fresh water delivery pump, and a first stop check valve is provided on the water outlet side of the first fresh water delivery pump;

[0018] A fourth stop valve is arranged on the water inlet side of the second fresh water delivery pump, and a second stop check valve is arranged on the water outlet side of the second fresh water delivery pump.

[0019] Optionally, electric butterfly valves are separately provided at the ends of the first main drainage pipeline and the second main drainage pipeline, and a sea discharge pipeline is led out on the pipeline between the two electric butterfly valves, and an electric butterfly valve and a sea discharge check valve are provided on the sea discharge pipeline.

[0020] Optionally, the first fresh water tank, the second fresh water tank, the third fresh water tank, and the fourth fresh water tank are all provided with a high-level alarm and a low-level alarm.

[0021] Optionally, the water inlet end of the first main filling pipeline is provided with two parallel water inlet branches, and the two water inlet branches are respectively located on the port side and the starboard side of the first bow;

[0022] And / or, the water inlet end of the second main filling pipeline is provided with two parallel water inlet branches, and the two water inlet branches are respectively located on the port side and the starboard side of the second bow.

[0023] Optionally, a third stop check valve is provided on the first drainage pipeline; a fourth stop check valve is provided on the second drainage pipeline; a fifth stop check valve is provided on the third drainage pipeline; and a sixth stop check valve is provided on the fourth drainage pipeline.

[0024] Optionally, an electric butterfly valve is provided on each of the first filling pipeline, the second filling pipeline, the third filling pipeline and the fourth filling pipeline.

[0025] A second aspect of the present invention provides a method for filling, transferring and cleaning a fresh water tank of a double-ended passenger ship, wherein the double-ended passenger ship comprises any one of the double-ended passenger ships of the first aspect of the present invention, and the method comprises:

[0026] When the first bow end of the double-ended passenger ship docks at the port, the first filling station is activated to fill the first fresh water tank and the second fresh water tank with fresh water through the first total filling pipeline and the first filling pipeline and the second filling pipeline; then the first total filling pipeline is used to supply water to the second total filling pipeline, and then the second total filling pipeline is used to supply water to the third filling pipeline and the fourth filling pipeline respectively to fill the third fresh water tank and the fourth fresh water tank with fresh water;

[0027] Or, when the first bow of a double-headed passenger ship docks at the port, fresh water needs to be added to the first fresh water tank, the third fresh water tank and the fourth fresh water tank, and the second fresh water tank needs to be cleaned: first fill the four fresh water tanks with water at the same time, and add medicine to the second fresh water tank at the same time. After adding medicine, close the second filling pipeline, clean the second fresh water tank, and after cleaning, open the second drainage pipeline and the first main drainage pipeline, and start the first fresh water delivery pump to empty and discharge into the sea.

[0028] The beneficial effects brought by the present invention are as follows:

[0029] There are pipelines connecting the two filling stations to the four fresh water tanks, and the four fresh water tanks are independent of each other. When the first bow of the double-headed passenger ship docks, fresh water needs to be added to the first fresh water tank, the third fresh water tank and the fourth fresh water tank. When the second fresh water tank needs to be cleaned: first fill the four fresh water tanks with water at the same time, and add medicine to the second fresh water tank at the same time. After adding medicine, close the second filling pipeline, clean the second fresh water tank, and after cleaning, open the second drainage pipeline and the first main drainage pipeline, and start the first fresh water delivery pump to empty and discharge into the sea. It can be seen that the second fresh water tank can be cleaned after being filled with fresh water for a period of time. While cleaning, the other three fresh water tanks can be continuously filled with fresh water, realizing the simultaneous operation of filling fresh water and cleaning fresh water tanks. After the fresh water filling and fresh water tank cleaning are completed, the fresh water pump can be started immediately to drain the water, which greatly improves the work efficiency compared to the separate fresh water filling, fresh water tank cleaning, and post-washing water discharge into the sea. BRIEF DESCRIPTION OF THE DRAWINGS

[0030] Figure 1 A structural diagram of a double-ended passenger ship fresh water system according to an embodiment of the present invention is shown.

[0031] In the figure: 1, chlorination equipment; 2, dosing hose; 31, first fresh water delivery pump; 32, second fresh water delivery pump; 4, electric butterfly valve; 51, first stop valve; 52, second stop valve; 53, third stop valve; 54, fourth stop valve; 55, fifth stop valve; 56, sixth stop valve; 57, seventh stop valve; 58, eighth stop valve; 61, first stop check valve; 62, second stop check valve; 63, third stop check valve; 64, fourth stop check valve; 65, fifth stop check valve; 66, sixth stop check valve; 7, sea discharge check valve; 8, high level alarm ; 9. Low level alarm; 10. Shore connection; 11. Quick connector; 121. First drainage pipeline; 122. Second drainage pipeline; 123. Third drainage pipeline; 124. Fourth drainage pipeline; 131. First fresh water tank; 132. Second fresh water tank; 133. Third fresh water tank; 134. Fourth fresh water tank; 141. First total filling pipeline; 142. Second total filling pipeline; 151. First filling pipeline; 152. Second filling pipeline; 153. Third filling pipeline; 154. Fourth filling pipeline; 161. First filling station; 162. Second filling station. DETAILED DESCRIPTION

[0032] In order to make the purpose, technical solution and advantages of the present invention clearer, the technical solution in the embodiment of the present invention will be clearly and completely described below in conjunction with the drawings in the embodiment of the present invention. Obviously, the described embodiment is a part of the embodiment of the present invention, not all the embodiments. Based on the embodiments of the present invention, all other embodiments obtained by ordinary technicians in this field without creative work are within the scope of protection of the present invention.

[0033] In this embodiment, the double-headed passenger ship is provided with a driving cab in both directions, both of which are bows. Two fresh water tanks are provided at the first bow and two fresh water tanks are also provided at the second bow. Each fresh water tank is provided with a low liquid level alarm and a high liquid level alarm. The low level alarm is used to protect the delivery pump. When the liquid level in the fresh water tank approaches the low level (set value), the low level alarm outputs a signal to the delivery pump, and the delivery pump automatically stops working after receiving the signal; the high level alarm is used to fill the fresh water tank. When the liquid level in the fresh water tank is too close to the high level (set value), the high level alarm outputs a signal to stop the filling work on the shore, or when transferring, the signal is sent to the delivery pump, and the delivery pump automatically stops working after receiving the signal.

[0034] See also Figure 1 This embodiment provides a double-ended passenger ship fresh water system, comprising a first bow and a second bow located at both ends of the hull, characterized in that:

[0035] The first bow includes a first fresh water tank 131, a second fresh water tank 132, a first filling station 161 and a first fresh water delivery pump 31; the filling station is provided with pipelines, electric butterfly valves (for the convenience of crew operation) and a shore connector 10 connected to the dock; the water outlet of the first filling station 161 is connected to the first total filling pipeline 141; the water inlet of the first fresh water tank 131 is connected to the first filling pipeline 151, and the water inlet of the second fresh water tank 132 is connected to the second filling pipeline 152, and the first filling pipeline 151 and the second filling pipeline 152 are both connected to the first total filling pipeline 141; electric butterfly valves 4, specifically remote-controlled butterfly valves, are provided on the inlets of the first fresh water tank 131 and the second fresh water tank 132, i.e., the first filling pipeline 151 and the second filling pipeline 152, so as to facilitate the crew to fill fresh water into the fresh water tank when the ship is docked, and facilitate operation during cleaning.

[0036] The drain outlet of the first fresh water tank 131 is connected to the first drain pipeline 121, the drain outlet of the second fresh water tank 132 is connected to the second drain pipeline 122, the first drain pipeline 121 and the second drain pipeline 122 are both connected to the first main drain pipeline, the first main drain pipeline is provided with a first stop valve 51, the water inlet and outlet ends of the first fresh water delivery pump 31 are both connected to the first main drain pipeline and to the front and rear sides of the first stop valve 51; specifically, suction ports with filter screens and stop check valves are provided on the first drain pipelines 121 and the second drain pipelines 122 of the first fresh water tank 131 and the second fresh water tank 132, the filter screens prevent debris from entering the pipelines, and the stop check valves prevent water in the pipelines from flowing back into the fresh water tanks.

[0037] The second bow includes a third fresh water tank 133, a fourth fresh water tank 134, a second filling station 162 and a second fresh water delivery pump 32; the filling station is provided with pipelines, electric butterfly valves (for the convenience of crew operation) and a shore connector 10 connected to the dock; the water outlet of the second filling station 162 is connected to the second total filling pipeline 142; the water inlet of the third fresh water tank 133 is connected to the third filling pipeline 153, the water inlet of the fourth fresh water tank 134 is connected to the fourth filling pipeline 154, and the third filling pipeline 153 and the fourth filling pipeline 154 are both connected to the second total filling pipeline 142; an electric butterfly valve 4 is arranged at the inlet of the third fresh water tank 133 and the fourth fresh water tank 134, that is, the third filling pipeline 153 and the fourth filling pipeline 154, specifically a remote control butterfly valve, to facilitate the crew to fill fresh water into the fresh water tank when the ship is docked, and to facilitate operation during cleaning.

[0038] The drain outlet of the third fresh water tank 133 is connected to the third drain pipeline 123, the drain outlet of the fourth fresh water tank 134 is connected to the fourth drain pipeline 124, the third drain pipeline 123 and the fourth drain pipeline 124 are both connected to the second main drain pipeline, the second main drain pipeline is provided with a second stop valve 52, the water inlet and outlet ends of the second fresh water delivery pump 32 are both connected to the second main drain pipeline and connected to the front and rear sides of the second stop valve 52; the first main filling pipeline 141 is connected to the second main filling pipeline 142; specifically, the third drain pipeline 123 and the fourth drain pipeline 124 of the third fresh water tank 133 and the fourth fresh water tank 134 are provided with suction ports with filter screens and stop check valves, the filter screens prevent debris from entering the pipelines, and the stop check valves prevent water in the pipelines from flowing back into the fresh water tanks.

[0039] The first fresh water tank 131, the second fresh water tank 132, the third fresh water tank 133 and the fourth fresh water tank 134 are all connected to the dosing equipment; specifically, the chlorination equipment 1 is respectively configured at the first bow and the second bow, and the chlorination equipment 1 is not connected to the fresh water tank under normal circumstances. When the fresh water tank needs to be cleaned with chlorine, the dosing hose 2 is connected to the chlorination pipeline through the quick connector 11, the valve is opened, and the chlorination equipment 1 is started to chlorinate the fresh water tank; specifically, the fifth stop valve 55 is opened to add chlorine to the first fresh water tank 131, the sixth stop valve 56 is opened to add chlorine to the second fresh water tank 132, the seventh stop valve 57 is opened to add chlorine to the third fresh water tank 133, and the eighth stop valve 58 is opened to add chlorine to the fourth fresh water tank 134. It can be seen that a dedicated chlorination pipeline is set on the top of the fresh water tank, which is used for adding fresh water and chlorine at the same time when the fresh water tank is cleaned, and they do not affect each other at the same time.

[0040] Further, the ends of the first main drainage pipeline and the second main drainage pipeline are butted and connected to each other;

[0041] The end of the first main filling pipeline 141 is connected to the first main drainage pipeline and connected to the output side of the first fresh water delivery pump 31;

[0042] The end of the second main filling pipeline 142 is connected to the second main drainage pipeline and is connected to the output side of the second fresh water delivery pump 32 .

[0043] Furthermore, electric butterfly valves 4 are provided at the ends of the first main filling pipeline 141 and the second main filling pipeline 142 .

[0044] Further, a third stop valve 53 is provided on the water inlet side of the first fresh water delivery pump 31, and a first stop check valve 61 is provided on the water outlet side of the first fresh water delivery pump 31;

[0045] A fourth stop valve 54 is provided on the water inlet side of the second fresh water delivery pump 32 , and a second stop check valve 62 is provided on the water outlet side of the second fresh water delivery pump 32 .

[0046] Furthermore, electric butterfly valves 4 are separately provided at the ends of the first main drainage pipeline and the second main drainage pipeline, and a sea discharge pipeline is led out on the pipeline between the two electric butterfly valves 4. The sea discharge pipeline is provided with an electric butterfly valve 4 and a sea discharge check valve 7, and the sea discharge check valve 7 is installed close to the outer plate of the hull.

[0047] Furthermore, the first fresh water tank 131 , the second fresh water tank 132 , the third fresh water tank 133 , and the fourth fresh water tank 134 are all provided with a high-level alarm 8 and a low-level alarm 9 .

[0048] Furthermore, the water inlet end of the first main filling pipeline 141 is provided with two parallel water inlet branches, the two water inlet branches are respectively located on the port side and the starboard side of the first bow, and each water inlet branch is provided with an electric butterfly valve 4;

[0049] And / or, the water inlet end of the second main filling pipeline 142 is provided with two parallel water inlet branches, the two water inlet branches are respectively located on the port and starboard side of the second bow, and each water inlet branch is provided with an electric butterfly valve 4.

[0050] Furthermore, a third stop check valve 63 is provided on the first drainage pipeline 121 ; a fourth stop check valve 64 is provided on the second drainage pipeline 122 ; a fifth stop check valve 65 is provided on the third drainage pipeline 123 ; and a sixth stop check valve 66 is provided on the fourth drainage pipeline 124 .

[0051] Furthermore, an electric butterfly valve 4 is provided on each of the first filling pipeline 151 , the second filling pipeline 152 , the third filling pipeline 153 , and the fourth filling pipeline 154 .

[0052] The method for filling, transferring and cleaning the fresh water tank of a double-ended passenger ship of the present embodiment comprises:

[0053] When the first bow end of the double-headed passenger ship docks, the first filling station 161 is activated to fill the first fresh water tank 131 and the second fresh water tank 132 with fresh water through the first total filling pipeline 141 and the first filling pipeline 151 and the second filling pipeline 152; then the first total filling pipeline 141 supplies water to the second total filling pipeline 142, and then the second total filling pipeline 142 supplies water to the third filling pipeline 153 and the fourth filling pipeline 154 to fill the third fresh water tank 133 and the fourth fresh water tank 134 with fresh water respectively;

[0054] Similarly, when the second bow end of the double-headed passenger ship docks, the second filling station 162 is activated to fill the third fresh water tank 133 and the fourth fresh water tank 134 with fresh water through the second total filling pipeline 142 and the third filling pipeline 153 and the fourth filling pipeline 154; then the second total filling pipeline 142 supplies water to the first total filling pipeline 141, and then the first total filling pipeline 141 supplies water to the first filling pipeline 151 and the second filling pipeline 152 to fill the first fresh water tank 131 and the second fresh water tank 132 with fresh water respectively;

[0055] When the first bow of the double-headed passenger ship docks, fresh water needs to be added to the first fresh water tank 131, the third fresh water tank 133 and the fourth fresh water tank 134. When the second fresh water tank 132 needs to be cleaned: first, water is added to the four fresh water tanks at the same time, and the second fresh water tank 132 is filled with medicine at the same time. After adding medicine, the second filling pipeline 152 is closed, and the second fresh water tank 132 is cleaned. After cleaning, the second drainage pipeline 122 and the first main drainage pipeline are opened, and the first fresh water delivery pump 31 is started to empty and discharge the water into the sea. Similarly, the two fresh water delivery pumps can be combined arbitrarily to transfer and empty or add fresh water to the four fresh water tanks.

[0056] In this embodiment, a first fresh water delivery pump 31 is arranged near the fresh water tank at the first bow, and a second fresh water delivery pump 32 is arranged near the fresh water tank at the second bow. These two delivery pumps are respectively used for fresh water transfer between the four fresh water tanks and fresh water discharge to the sea when the fresh water tanks are cleaned.

[0057] In summary, the present invention creatively solves the problem of double-ended passenger ships being able to quickly complete the filling, allocation, cleaning and discharge of the ship's fresh water tanks into the sea in a relatively short port period. The time for filling, allocation, cleaning and discharge of the ship's fresh water tanks when the ship is docked is shortened, the ship's operating efficiency is improved, and the operating costs are reduced. The design of the ship's fresh water pipeline system is fully utilized to meet the needs of ship operations; the problem of fresh water filling, allocation and cleaning is effectively solved during extremely short port calls; two fresh water delivery pumps are set up to more efficiently allocate fresh water from the fresh water tanks, clean and discharge the sea; it should be noted that the present invention can be applied to all passenger ships or other ships with fresh water tanks set up in front and behind to meet the needs of filling, allocation, cleaning and discharge.

[0058] The above are preferred embodiments of the present invention. It should be pointed out that, for ordinary technicians in this technical field, several improvements and modifications can be made without departing from the principles of the present invention. These improvements and modifications should also be regarded as within the scope of protection of the present invention.

Claims

1. A double-ended passenger ship fresh water system, comprising a first bow and a second bow located at both ends of the hull, characterized in that: The first bow includes a first fresh water tank, a second fresh water tank, a first filling station and a first fresh water delivery pump; The water outlet of the first filling station is connected to a first main filling pipeline; the water inlet of the first fresh water tank is connected to a first filling pipeline, the water inlet of the second fresh water tank is connected to a second filling pipeline, and the first filling pipeline and the second filling pipeline are both connected to the first main filling pipeline; The drain port of the first fresh water tank is connected to a first drain pipeline, the drain port of the second fresh water tank is connected to a second drain pipeline, the first drain pipeline and the second drain pipeline are both connected to a first main drain pipeline, a first stop valve is provided on the first main drain pipeline, and a water inlet and a water outlet of a first fresh water delivery pump are both connected to the first main drain pipeline and connected to the front and rear sides of the first stop valve; The second bow includes a third fresh water tank, a fourth fresh water tank, a second filling station and a second fresh water delivery pump; The water outlet of the second filling station is connected to the second main filling pipeline; the water inlet of the third fresh water tank is connected to the third filling pipeline, the water inlet of the fourth fresh water tank is connected to the fourth filling pipeline, and the third filling pipeline and the fourth filling pipeline are both connected to the second main filling pipeline; The drain port of the third fresh water tank is connected to the third drain pipeline, the drain port of the fourth fresh water tank is connected to the fourth drain pipeline, the third drain pipeline and the fourth drain pipeline are both connected to the second main drain pipeline, the second main drain pipeline is provided with a second stop valve, the water inlet and outlet of the second fresh water delivery pump are both connected to the second main drain pipeline and connected to the front and rear sides of the second stop valve; the first main filling pipeline is connected to the second main filling pipeline; The first fresh water tank, the second fresh water tank, the third fresh water tank and the fourth fresh water tank are all connected to the dosing equipment.

2. The double-ended passenger ship fresh water system according to claim 1, characterized in that: The ends of the first main drainage pipeline and the second main drainage pipeline are butt-jointed and connected to each other; The end of the first main filling pipeline is connected to the first main drainage pipeline and to the output side of the first fresh water delivery pump; The end of the second main filling pipeline is connected to the second main drainage pipeline and to the output side of the second fresh water delivery pump.

3. The double-ended passenger ship fresh water system according to claim 2, characterized in that: Electric butterfly valves are provided at the ends of the first main filling pipeline and the second main filling pipeline.

4. The double-ended passenger ship fresh water system according to claim 2 or 3, characterized in that: A third stop valve is provided on the water inlet side of the first fresh water delivery pump, and a first stop check valve is provided on the water outlet side of the first fresh water delivery pump; A fourth stop valve is provided on the water inlet side of the second fresh water delivery pump, and a second stop check valve is provided on the water outlet side of the second fresh water delivery pump.

5. The double-ended passenger ship fresh water system according to claim 2 or 3, characterized in that: The ends of the first main drainage pipeline and the second main drainage pipeline are each individually provided with an electric butterfly valve, and a sea discharge pipeline is led out from the pipeline between the two electric butterfly valves, and the sea discharge pipeline is provided with the electric butterfly valve and the sea discharge check valve.

6. The double-ended passenger ship fresh water system according to any one of claims 1 to 3, characterized in that: The first fresh water tank, the second fresh water tank, the third fresh water tank and the fourth fresh water tank are all provided with a high-level alarm and a low-level alarm.

7. The double-ended passenger ship fresh water system according to any one of claims 1 to 3, characterized in that: The water inlet end of the first main filling pipeline is provided with two parallel water inlet branches, and the two water inlet branches are respectively located on the port side and the starboard side of the first bow; And / or, the water inlet end of the second main filling pipeline is provided with two parallel water inlet branches, and the two water inlet branches are respectively located on the port and starboard side of the second bow.

8. The double-ended passenger ship fresh water system according to any one of claims 1 to 3, characterized in that: The first drainage pipeline is provided with a third stop check valve; the second drainage pipeline is provided with a fourth stop check valve; the third drainage pipeline is provided with a fifth stop check valve; and the fourth drainage pipeline is provided with a sixth stop check valve.

9. The double-ended passenger ship fresh water system according to any one of claims 1 to 3, characterized in that: The first filling pipeline, the second filling pipeline, the third filling pipeline, and the fourth filling pipeline are each provided with an electric butterfly valve.

10. A method for filling, transferring and cleaning the fresh water tank of a double-ended passenger ship, characterized in that: The double-ended passenger ship comprises the double-ended passenger ship according to any one of claims 1 to 9, and the method comprises: When the first bow end of the double-ended passenger ship docks at the port, the first filling station is activated to fill the first fresh water tank and the second fresh water tank with fresh water through the first main filling pipeline and the first filling pipeline and the second filling pipeline; then the first main filling pipeline is used to supply water to the second main filling pipeline, and then the second main filling pipeline is used to supply water to the third filling pipeline and the fourth filling pipeline respectively to fill the third fresh water tank and the fourth fresh water tank with fresh water; Or, when the first bow end of the double-headed passenger ship docks at the port, fresh water needs to be added to the first fresh water tank, the third fresh water tank and the fourth fresh water tank, and the second fresh water tank needs to be cleaned: first, the four fresh water tanks are filled with water at the same time, and the second fresh water tank is added with medicine at the same time. After adding medicine, the second filling pipeline is closed, and the second fresh water tank is cleaned. After cleaning, the second drainage pipeline and the first main drainage pipeline are opened, and the first fresh water delivery pump is started to empty and discharge into the sea.

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