CN117458794A - Method for cooling generator in ship dock - Google Patents

Abstract

The invention discloses a cooling method of an in-dock generator of a ship, which comprises the following steps: pumping seawater to the first ballast tank and the second ballast tank; starting a generator, and performing a generator test; judging the starting quantity of the generators of the first tail pump cabin, if all the generators of the first tail pump cabin are started, pumping seawater to the first cooler through the first branch pipe, and simultaneously pumping the seawater of the first ballast tank to the first cooler; judging the starting quantity of the generators of the second tail pump cabin, if all the generators of the second tail pump cabin are started, pumping seawater to the second cooler through the first branch pipe, and pumping seawater to the second cooler through the second branch pipe; judging the starting quantity of the generators of the third tail pump cabin, if all the generators of the third tail pump cabin are started, pumping seawater to the third cooler through the second branch pipe, and simultaneously pumping the seawater of the second ballast tank to the third cooler. The cooling method for the generators in the ship dock can meet the cooling requirement when six generators work simultaneously.

Description

Method for cooling generator in ship dock

Technical Field

The invention relates to the technical field of ships, in particular to a cooling method of a generator in a ship dock.

Background

The ship can be launched after being built in the dock to a certain extent, and then is parked at the dock, and the rest of the building work is completed at the dock. The vessel requires a lot of equipment commissioning work during dock construction, some of which require powering with generators on the vessel. Therefore, the generator of the ship needs to complete all the test work when it is built in the dock to the extent that it can be used normally.

When the ship performs the generator test in the dock, the generator needs to be cooled by utilizing the seawater, so that the normal performance of the generator test is ensured. The amount of sea water required varies depending on the power of the generator. At present, the cooling method of the generator when the generator is tested in the ship dock comprises the following steps: and the other end of the tooling hose is connected to a plate cooler on the ship, and the plate cooler is used for providing cooling seawater to cool the generator. But this method is only applicable to generators with a power generation of less than 3000KW. The existing ship is provided with six generators, and the power of each generator is greater than 3000KW. Therefore, the existing cooling method for the generators in the ship dock cannot meet the testing requirements of the six generators, and cannot provide enough seawater to cool the six generators.

Disclosure of Invention

The invention aims at: the cooling method for the generator in the ship dock solves the problems that the existing cooling method for the generator in the ship dock cannot meet the testing requirements of six generators and cannot provide enough seawater to cool the six generators.

To achieve the purpose, the invention adopts the following technical scheme:

the utility model provides a cooling method of generator in ship dock, boats and ships include along the first afterbody pump bay of boats and ships width direction interval distribution, second afterbody pump bay and third afterbody pump bay, first afterbody pump bay, second afterbody pump bay and third afterbody pump bay all dispose two generators, boats and ships still include along the first ballast tank and the second ballast tank of boats and ships width direction interval setting, fire-fighting sea water house steward intercommunication has first branch pipe and second branch pipe, first branch pipe and second branch pipe all extend to the afterbody pump bay of boats and ships, first cooler in the first afterbody pump bay is through pipeline intercommunication in first branch pipe, second cooler in the second afterbody pump bay is still through pipeline intercommunication in second branch pipe, third cooler in the third afterbody pump bay is through pipeline intercommunication in second branch pipe, first ballast tank is through pipeline intercommunication in first ballast tank, first ballast tank is through pipeline intercommunication in second ballast tank, first ballast tank is through the second ballast tank through pipeline intercommunication in second ballast tank; the cooling method of the ship in-dock generator comprises the following steps:

pumping seawater to the first ballast tank and the second ballast tank;

starting a generator, and performing a generator test;

judging the starting quantity of the generators of the first tail pump cabin, if all the generators of the first tail pump cabin are started, pumping seawater to the first cooler through the first branch pipe, and simultaneously pumping the seawater of the first ballast tank to the first cooler;

judging the starting quantity of the generators of the second tail pump cabin, if all the generators of the second tail pump cabin are started, pumping seawater to the second cooler through the first branch pipe, and pumping seawater to the second cooler through the second branch pipe;

judging the starting number of the generators of the third tail pump cabin, and if all the generators of the third tail pump cabin are started, pumping seawater to the third cooler through the second branch pipe, and simultaneously pumping the seawater of the second ballast tank to the third cooler.

Preferably, the judging of the number of generator activations of the first tail pump compartment further comprises the steps of:

and if the generator of the first tail pump cabin is started, pumping seawater to the first cooler through the first branch pipe, and disconnecting the communication between the first ballast cabin and the first cooler.

As a preferable mode of the above-mentioned cooling method for the in-dock power generator, pumping seawater to the first cooler through the first branch pipe, and after disconnecting the first ballast tank from the first cooler, further comprising the steps of:

and monitoring the temperature of the first cooler in real time, judging whether the temperature of the first cooler is greater than a first set temperature range, and if so, pumping the seawater in the first ballast tank to the first cooler.

As a preferable scheme of the cooling method for the generator in the ship dock, the judging of the starting number of the generator in the third tail pump compartment further includes the following steps:

and if the generator of the third tail pump cabin is started, pumping seawater to the third cooler through the second branch pipe, and disconnecting the communication between the second ballast cabin and the third cooler.

As a preferable mode of the above-mentioned cooling method for the in-dock power generator, pumping seawater to the third cooler through the second branch pipe, and after disconnecting the second ballast tank from the third cooler, further comprising the steps of:

and monitoring the temperature of the third cooler in real time, judging whether the temperature of the third cooler is greater than a second set temperature range, and if so, pumping the seawater in the second ballast tank to the third cooler.

As a preferable scheme of the cooling method for the generator in the ship dock, the judging of the starting number of the generator in the second tail pump compartment further includes the following steps:

and if the generator of the second tail pump cabin is started, pumping seawater to the second cooler through the first branch pipe, and disconnecting the second branch pipe from the second cooler.

As a preferable mode of the above-mentioned cooling method for the generator in the ship dock, pumping seawater to the second cooler through the first branch pipe, and after disconnecting the second branch pipe from the second cooler, further comprising the steps of:

and monitoring the temperature of the second cooler in real time, judging whether the temperature of the second cooler is greater than a third set temperature range, and pumping seawater to the second cooler through the second branch pipe if the temperature of the second cooler is greater than the third set temperature range.

As a preferable mode of the above-mentioned cooling method for a ship in-dock generator, the first ballast tank and the second ballast tank are both provided with a liquid level monitoring device, and the cooling method for a ship in-dock generator further includes:

and monitoring the water level of the first ballast tank and the water level of the second ballast tank in real time, stopping pumping seawater into the first ballast tank if the water level of the first ballast tank is higher than a first set water level, and stopping pumping seawater into the second ballast tank if the water level of the second ballast tank is higher than a second set water level.

As the preferable scheme of the cooling method of the generator in the ship dock, the first tail pump cabin, the second tail pump cabin and the third tail pump cabin are respectively provided with a water outlet, the first cooler is communicated with the water outlet of the first tail pump cabin through a pipeline, the second cooler is communicated with the water outlet of the second tail pump cabin through a pipeline, the third cooler is communicated with the water outlet of the third tail pump cabin through a pipeline, a water level monitoring device is arranged at the bottom of the dock, a submersible pump is arranged at the bottom of the dock, the submersible pump is used for pumping seawater in the dock out of the dock, the generator is started, and the method further comprises the following steps after the generator test:

discharging the heat exchange wastewater of the first cooler, the second cooler and the third cooler to a dock floor;

and monitoring the water level of the bottom of the dock in real time, and controlling the submersible pump to discharge the wastewater of the bottom of the dock outside the dock if the water level of the bottom of the dock is higher than the set safety height.

The beneficial effects of the invention are as follows:

the invention provides a cooling method of an in-dock generator of a ship, which comprises the steps of pumping seawater to a first ballast tank and a second ballast tank; starting a generator, and performing a generator test; judging the starting quantity of the generators of the first tail pump cabin, if all the generators of the first tail pump cabin are started, pumping seawater to the first cooler through the first branch pipe, and simultaneously pumping the seawater of the first ballast tank to the first cooler; judging the starting quantity of the generators of the second tail pump cabin, if all the generators of the second tail pump cabin are started, pumping seawater to the second cooler through the first branch pipe, and pumping seawater to the second cooler through the second branch pipe; judging the starting quantity of the generators of the third tail pump cabin, if all the generators of the third tail pump cabin are started, pumping seawater to the third cooler through the second branch pipe, and simultaneously pumping the seawater of the second ballast tank to the third cooler. In detail, before performing the generator test, a certain amount of seawater is first stored using the first ballast tank and the second ballast tank. When the two generators in the first tail pump cabin are started, the seawater in the fire-fighting seawater main pipe is pumped to the first cooler by the first branch pipe, and the seawater in the first ballast cabin is pumped to the first cooler, so that the cooling requirement of the two motors in the first tail pump cabin during simultaneous working can be met; similarly, when the two generators in the third tail pump cabin are both started, the second branch pipe is utilized to pump the seawater of the fire-fighting seawater main pipe to the third cooler, and meanwhile, the third cooler in the seawater pumping process in the second ballast tank is utilized to pump the seawater, so that the cooling requirement of the two motors in the third tail pump cabin during the simultaneous working can be met; when the two generators in the second tail pump cabin are all started, the first branch pipe and the second branch pipe are utilized to pump seawater to the second cooler at the same time, so that the cooling requirement of the two generators in the second tail pump cabin during the simultaneous working is met.

Therefore, the cooling method for the generator in the ship dock utilizes the first ballast tank, the second ballast tank and the fire-fighting seawater main pipe to provide cooling seawater for the generator so as to meet the cooling requirement when six generators work simultaneously.

Drawings

FIG. 1 is a schematic illustration of the connection of a ship, a fire seawater main, a first branch pipe and a second branch pipe provided in accordance with an embodiment of the present invention;

fig. 2 is a schematic flow chart of a cooling method for an in-dock generator of a ship according to a second embodiment of the present invention.

In the figure:

11. a first tail pump compartment; 111. a first cooler; 12. a second tail pump compartment; 121. a second cooler; 13. a third tail pump compartment; 131. a third cooler; 14. a first ballast tank; 15. a second ballast tank;

2. fire-fighting sea water main pipe; 21. a first branch pipe; 22. and a second branch pipe.

Detailed Description

The invention is described in further detail below with reference to the drawings and examples. It is to be understood that the specific embodiments described herein are merely illustrative of the invention and are not limiting thereof. It should be further noted that, for convenience of description, only some, but not all of the structures related to the present invention are shown in the drawings.

In the description of the present invention, unless explicitly stated and limited otherwise, the terms "connected," "connected," and "fixed" are to be construed broadly, and may be, for example, fixedly connected, detachably connected, or integrally formed; can be mechanically or electrically connected; can be directly connected or indirectly connected through an intermediate medium, and can be communicated with the inside of two elements or the interaction relationship of the two elements. The specific meaning of the above terms in the present invention will be understood in specific cases by those of ordinary skill in the art.

In the present invention, unless expressly stated or limited otherwise, a first feature "above" or "below" a second feature may include both the first and second features being in direct contact, as well as the first and second features not being in direct contact but being in contact with each other through additional features therebetween. Moreover, a first feature being "above," "over" and "on" a second feature includes the first feature being directly above and obliquely above the second feature, or simply indicating that the first feature is higher in level than the second feature. The first feature being "under", "below" and "beneath" the second feature includes the first feature being directly under and obliquely below the second feature, or simply means that the first feature is less level than the second feature.

In the description of the present embodiment, the terms "upper", "lower", "right", etc. orientation or positional relationship are based on the orientation or positional relationship shown in the drawings, and are merely for convenience of description and simplicity of operation, and do not indicate or imply that the apparatus or elements referred to must have a specific orientation, be constructed and operated in a specific orientation, and thus should not be construed as limiting the invention. Furthermore, the terms "first," "second," and the like, are used merely for distinguishing between descriptions and not for distinguishing between them.

Embodiments of the present invention are described in detail below, examples of which are illustrated in the accompanying drawings, wherein like or similar reference numerals refer to like or similar elements or elements having like or similar functions throughout. The embodiments described below by referring to the drawings are illustrative only and are not to be construed as limiting the invention.

At present, the cooling method of the generator when the generator is tested in the ship dock comprises the following steps: and the other end of the tooling hose is connected to a plate cooler on the ship, and the plate cooler is used for providing cooling seawater to cool the generator. But this method is only applicable to generators with a power generation of less than 3000KW. The existing ship is provided with six generators, and the power of each generator is greater than 3000KW. Therefore, the existing cooling method for the generators in the ship dock cannot meet the testing requirements of the six generators, and cannot provide enough seawater to cool the six generators. In order to solve the problems, the invention provides the following technical scheme.

Example 1

As shown in fig. 1, a first embodiment of the present invention provides a ship, which includes a first tail pump chamber 11, a second tail pump chamber 12 and a third tail pump chamber 13 that are spaced apart in a width direction of the ship, wherein the first tail pump chamber 11, the second tail pump chamber 12 and the third tail pump chamber 13 are each configured with two generators, and any two, three, four, five or six generators can be selectively turned on during a generator test. The ship further comprises a first ballast tank 14 and a second ballast tank 15 which are arranged at intervals along the width direction of the ship, the fire-fighting seawater main pipe 2 is communicated with a first branch pipe 21 and a second branch pipe 22, the first branch pipe 21 and the second branch pipe 22 are both extended to the tail pump tank of the ship, a first cooler 111 in the first tail pump tank 11 is communicated with the first branch pipe 21 through a pipeline, a second cooler 121 in the second tail pump tank 12 is also communicated with the second branch pipe 22 through a pipeline, a third cooler 131 in the third tail pump tank 13 is communicated with the second branch pipe 22 through a pipeline, the first ballast tank 14 is communicated with the first branch pipe 21 through a pipeline, the first ballast tank 14 is also communicated with the first cooler 111 through a pipeline, the second ballast tank 15 is communicated with the second branch pipe 22 through a pipeline, and the second ballast tank 15 is also communicated with the third cooler 131 through a pipeline.

In detail, the first cooler 111 is used to cool two generators of the first tail pump compartment 11, the second cooler 121 is used to cool two generators of the second tail pump compartment 12, and the third cooler 131 is used to cool two generators of the third tail pump compartment 13. In more detail, the first cooler 111, the second cooler 121 and the third cooler are all fresh water coolers.

It should be noted that, control valves are installed between the above-mentioned pipelines, and the pipelines are selectively opened or closed by the control valves, so that redundancy is avoided, and in this embodiment, detailed description will not be given.

In this embodiment, the water pump is used to provide power for the transportation of seawater, and the specific number of water pumps and the installation positions are not described.

Specifically, both the first ballast tank 14 and the second ballast tank 15 are equipped with a liquid level monitoring device. The liquid level monitoring device is used to detect the liquid level of the first and second ballast tanks 14, 15. Preferably, the liquid level monitoring device is a liquid level sensor.

Specifically, the first tail pump cabin 11, the second tail pump cabin 12 and the third tail pump cabin 13 are all provided with water outlets, the first cooler 111 is communicated with the water outlet of the first tail pump cabin 11 through a pipeline, the second cooler 121 is communicated with the water outlet of the second tail pump cabin 12 through a pipeline, the third cooler 131 is communicated with the water outlet of the third tail pump cabin 13 through a pipeline, a water level monitoring device is installed at the bottom of a dock, and a submersible pump is installed at the bottom of the dock and used for pumping seawater in the dock out of the dock. In detail, the waste water after heat exchange of the first cooler 111, the second cooler 121 and the third cooler 131 is discharged to the bottom of the dock through the water outlet, the waste water level of the bottom of the dock is monitored by the water level monitoring device, and when the water level reaches a certain height, the waste water is discharged to the outside of the dock through the submersible pump. Preferably, the water level monitoring device is a water level sensor.

Example two

As shown in fig. 2, a second embodiment of the present invention provides a method for cooling a generator in a ship dock, which specifically includes:

s100, pumping seawater into the first ballast tank 14 and the second ballast tank 15.

S200, starting the generator, and performing a generator test.

And S300, judging the starting number of the generators of the first tail pump cabin 11, and if all the generators of the first tail pump cabin 11 are started, pumping seawater to the first cooler 111 through the first branch pipe 21, and simultaneously pumping the seawater of the first ballast tank 14 to the first cooler 111.

And S400, judging the starting number of the generators of the second tail pump cabin 12, and pumping seawater to the second cooler 121 through the first branch pipe 21 and pumping seawater to the second cooler 121 through the second branch pipe 22 if all the generators of the second tail pump cabin 12 are started.

And S500, judging the starting number of the generators of the third tail pump cabin 13, and if all the generators of the third tail pump cabin 13 are started, pumping seawater to the third cooler 131 through the second branch pipe 22, and simultaneously pumping the seawater of the second ballast tank 15 to the third cooler 131.

In detail, before performing the generator test, a certain amount of seawater is first stored using the first ballast tank 14 and the second ballast tank 15. When the two generators in the first tail pump cabin 11 are started, the first branch pipe 21 is used for pumping the seawater in the fire-fighting seawater main pipe 2 to the first cooler 111, and simultaneously pumping the seawater in the first ballast tank 14 to the first cooler 111, so that the cooling requirement of the two motors in the first tail pump cabin 11 during simultaneous operation can be met; similarly, when both generators in the third tail pump compartment 13 are started, the second branch pipe 22 is utilized to pump the seawater of the fire-fighting seawater main pipe 2 to the third cooler 131, and simultaneously the third cooler 131 in the seawater pumping process in the second ballast tank 15, so that the cooling requirement of the two motors in the third tail pump compartment 13 during simultaneous working can be met; when both generators in the second tail pump compartment 12 are on, seawater is pumped to the second cooler 121 simultaneously by the first branch pipe 21 and the second branch pipe 22, so that the cooling requirement when both generators in the second tail pump compartment 12 work simultaneously is met. Thus, the cooling method for the in-dock generator of the ship provided by the embodiment utilizes the first ballast tank 14, the second ballast tank 15 and the fire-fighting seawater main pipe 2 to provide cooling seawater for the generator so as to meet the cooling requirement when six generators work simultaneously.

Specifically, determining the number of generator activations of the first tail pump compartment 11 further includes the steps of: if the generator of the first tail pump tank 11 is activated, seawater is pumped through the first branch pipe 21 to the first cooler 111, disconnecting the first ballast tank 14 from the first cooler 111.

Thus, it is possible to avoid a waste situation in which the first branch pipe 21 and the first ballast tank 14 simultaneously supply cooling seawater to the first cooler 111 when the generator in the first tail pump tank 11 is started up.

Further, if the generator of the first tail pump tank 11 is activated, seawater is pumped to the first cooler 111 through the first branch pipe 21, and the following steps are further included after the communication between the first ballast tank 14 and the first cooler 111 is disconnected: the temperature of the first cooler 111 is monitored in real time, and whether the temperature of the first cooler 111 is greater than a first set temperature range is determined, and if so, seawater in the first ballast tank 14 is pumped to the first cooler 111.

So configured, if the first branch pipe 21 is blocked or leaked to cause insufficient seawater in the first cooler 111, the generator cannot be cooled effectively, and at this time, the seawater in the first ballast tank 14 is pumped to the first cooler 111 to ensure that the test of the generator can be performed normally.

Specifically, determining the generator activation number of the third tail pump compartment 13 further includes the steps of: if the generator of the third tail pump tank 13 is activated one, seawater is pumped through the second branch pipe 22 to the third cooler 131, disconnecting the second ballast tank 15 from the third cooler 131. Thus, it is possible to avoid a waste situation in which the second branch pipe 22 and the second ballast tank 15 simultaneously supply the third cooler 131 with cooling seawater when the generator in the third tail pump compartment 13 is started up for one.

Further, if the generator of the third tail pump tank 13 is activated, seawater is pumped to the third cooler 131 through the second branch pipe 22, and the following steps are further included after the communication between the second ballast tank 15 and the third cooler 131 is disconnected: the temperature of the third cooler 131 is monitored in real time, and whether the temperature of the third cooler 131 is greater than a second set temperature range is determined, and if so, the seawater in the second ballast tank 15 is pumped to the third cooler 131.

So set up, if the second branch pipe 22 appears blockking up or leak and lead to the sea water of third cooler 131 not enough, can't carry out effective cooling to the generator, at this moment, pumps the sea water in the second ballast tank 15 to third cooler 131 and then guarantees that the test of generator can normally go on.

Specifically, determining the number of generator activations of the second tail pump compartment 12 further includes the steps of: if the generator of the second tail pump compartment 12 is activated one, seawater is pumped through the first branch pipe 21 to the second cooler 121, disconnecting the second branch pipe 22 from the second cooler 121. Alternatively, seawater is pumped to the coolers through the second branch pipe 22, disconnecting the first branch pipe 21 from the second cooler 121. Thus, it is possible to avoid a waste situation in which the first branch pipe 21 and the second branch pipe 22 simultaneously supply the cooling seawater to the second cooler 121 when the generator in the second tail pump compartment 12 is started up for one.

Further, if the generator of the second tail pump compartment 12 is started, seawater is pumped to the second cooler 121 through the first branch pipe 21, and the following steps are further included after the second branch pipe 22 is disconnected from the second cooler 121: the temperature of the second cooler 121 is monitored in real time, and it is determined whether the temperature of the second cooler 121 is greater than a third set temperature range, and if so, seawater is pumped to the second cooler 121 through the second branch pipe 22. Or, the temperature of the second cooler 121 is monitored in real time, and it is determined whether the temperature of the second cooler 121 is greater than a third set temperature range, and if so, seawater is pumped to the second cooler 121 through the first branch pipe 21.

So set up, if the first branch pipe 21 or the second branch pipe 22 appears blocking or leak and lead to the sea water of second cooler 121 not enough, can't carry out effective cooling to the generator, at this moment, utilize second branch pipe 22 or first branch pipe 21 pump sending sea water to second cooler 121, and then guarantee that the test of generator can normally go on.

Specifically, the first cooler 111, the second cooler 121, and the third cooler 131 are each provided with a temperature sensor, and the water temperatures of the first cooler 111, the second cooler 121, and the third cooler 131 are monitored by the temperature sensors. The first set temperature range, the second set temperature range, and the third set temperature range need to be set according to parameters of an actual generator, and are not limited herein.

Specifically, the cooling method of the in-dock power generator of the ship further comprises the following steps: the water level of the first ballast tank 14 and the second ballast tank 15 is monitored in real time, and if the water level of the first ballast tank 14 is greater than the first set water level, the pumping of the seawater into the first ballast tank 14 is stopped, and if the water level of the second ballast tank 15 is greater than the second set water level, the pumping of the seawater into the second ballast tank 15 is stopped. By doing so, the amount of seawater to be injected into the first and second ballast tanks 14 and 15 can be controlled more conveniently. In detail, the first set water level height and the second set water level height are the same, and specific parameters related to the first set water level height and the second set water level height need to be set according to actual test requirements.

Specifically, the method comprises the following steps of: discharging the heat exchange wastewater of the first cooler 111, the second cooler 121 and the third cooler 131 to the dock floor; and monitoring the water level of the bottom of the dock in real time, and controlling the submersible pump to discharge the wastewater of the bottom of the dock outside the dock if the water level of the bottom of the dock is higher than the set safety height. In detail, when the generator test is performed, the wastewater of the first cooler 111, the second cooler 121 and the third cooler 131 is continuously discharged to the dock floor through the pipeline, so as to ensure that the seawater can be continuously pumped to the first cooler 111, the second cooler 121 and the third cooler 131 for heat exchange. And (3) monitoring the water level condition of the dock bottom in real time, and when the water level of the wastewater in the dock bottom is higher than the set safety height, pumping out of the dock by using the submersible pump, so as to ensure the safety of ships and equipment. In detail, setting the safety height requires setting according to actual parameters of the ship.

It is to be understood that the above examples of the present invention are provided for clarity of illustration only and are not limiting of the embodiments of the present invention. Various obvious changes, rearrangements and substitutions can be made by those skilled in the art without departing from the scope of the invention. It is not necessary here nor is it exhaustive of all embodiments. Any modification, equivalent replacement, improvement, etc. which come within the spirit and principles of the invention are desired to be protected by the following claims.

Claims (9)

1. The cooling method of the generator in the ship dock is characterized in that a fire-fighting seawater main pipe (2) is communicated with a first branch pipe (21) and a second branch pipe (22), the first branch pipe (21) and the second branch pipe (22) are respectively extended to a tail pump of the ship, a first cooler (111) in the first tail pump tank (11) is communicated with the first branch pipe (21) through a pipeline, a second cooler (121) in the second tail pump tank (12) is communicated with the second branch pipe (22) through a pipeline, the second cooler (21) in the second tail pump tank (12) is communicated with the third cooler (22) through a pipeline, the first cooler (21) is communicated with the third cooler (13) through a pipeline, the first ballast tank (14) is further communicated with the first cooler (111) through a pipeline, the second ballast tank (15) is communicated with the second branch pipe (22) through a pipeline, and the second ballast tank (15) is further communicated with the third cooler (131) through a pipeline; the cooling method of the ship in-dock generator comprises the following steps:

pumping seawater to the first (14) and second (15) ballast tanks;

starting a generator, and performing a generator test;

judging the starting number of the generators of the first tail pump cabin (11), if all the generators of the first tail pump cabin (11) are started, pumping seawater to the first cooler (111) through the first branch pipe (21), and simultaneously pumping the seawater of the first ballast tank (14) to the first cooler (111);

judging the starting number of the generators of the second tail pump cabin (12), if all the generators of the second tail pump cabin (12) are started, pumping seawater to the second cooler (121) through the first branch pipe (21), and pumping seawater to the second cooler (121) through the second branch pipe (22);

judging the starting number of the generators of the third tail pump cabin (13), and if all the generators of the third tail pump cabin (13) are started, pumping seawater to the third cooler (131) through the second branch pipe (22), and simultaneously pumping the seawater of the second ballast tank (15) to the third cooler (131).

2. The method of cooling an in-dock generator of claim 1, wherein determining the number of generator activations of the first tail pump compartment (11) further comprises the steps of:

if the generator of the first tail pump tank (11) is started, seawater is pumped to the first cooler (111) through the first branch pipe (21), and the communication between the first ballast tank (14) and the first cooler (111) is disconnected.

3. A method of cooling an in-dock power generator of a marine vessel according to claim 2, characterized in that pumping seawater to the first cooler (111) through the first branch pipe (21), disconnecting the first ballast tank (14) from the first cooler (111) further comprises the steps of:

and monitoring the temperature of the first cooler (111) in real time, judging whether the temperature of the first cooler (111) is greater than a first set temperature range, and if so, pumping the seawater in the first ballast tank (14) to the first cooler (111).

4. The method of cooling an in-dock generator of claim 1, wherein determining the number of generator activations of the third tail pump compartment (13) further comprises the steps of:

-pumping seawater to the third cooler (131) through the second branch pipe (22) if the generator of the third tail pump tank (13) is activated, disconnecting the second ballast tank (15) from the third cooler (131).

5. The method of cooling an in-dock power generator of claim 4, wherein pumping seawater to the third cooler (131) through the second branch pipe (22), disconnecting the second ballast tank (15) from the third cooler (131), further comprises the steps of:

and monitoring the temperature of the third cooler (131) in real time, judging whether the temperature of the third cooler (131) is greater than a second set temperature range, and if so, pumping the seawater in the second ballast tank (15) to the third cooler (131).

6. The method of cooling an in-dock generator of claim 1, wherein determining the number of generator activations of the second tail pump compartment (12) further comprises the steps of:

if the generator of the second tail pump compartment (12) is started, pumping seawater to the second cooler (121) through the first branch pipe (21), and disconnecting the second branch pipe (22) from the second cooler (121).

7. The method of cooling an in-dock marine generator according to claim 6, characterized by pumping seawater through the first branch pipe (21) to the second cooler (121), disconnecting the second branch pipe (22) from the second cooler (121), further comprising the steps of:

and monitoring the temperature of the second cooler (121) in real time, judging whether the temperature of the second cooler (121) is greater than a third set temperature range, and if so, pumping seawater to the second cooler (121) through the second branch pipe (22).

8. The method of cooling an in-dock marine generator of claim 1, wherein the first ballast tank (14) and the second ballast tank (15) are each equipped with a fluid level monitoring device, and wherein the method further comprises:

and monitoring the water level of the first ballast tank (14) and the water level of the second ballast tank (15) in real time, stopping pumping seawater into the first ballast tank (14) if the water level of the first ballast tank (14) is higher than a first set water level, and stopping pumping seawater into the second ballast tank (15) if the water level of the second ballast tank (15) is higher than a second set water level.

9. The method for cooling the generator in the ship dock according to claim 1, wherein the first tail pump compartment (11), the second tail pump compartment (12) and the third tail pump compartment (13) are respectively provided with a water outlet, the first cooler (111) is communicated with the water outlet of the first tail pump compartment (11) through a pipeline, the second cooler (121) is communicated with the water outlet of the second tail pump compartment (12) through a pipeline, the third cooler (131) is communicated with the water outlet of the third tail pump compartment (13) through a pipeline, a water level monitoring device is installed at the bottom of the dock, a submersible pump is installed at the bottom of the dock, and the submersible pump is used for pumping seawater in the dock out of the dock, the method is characterized in that the generator is started for testing the generator, and the method further comprises the following steps:

discharging the heat exchange wastewater of the first cooler (111), the second cooler (121) and the third cooler (131) to a dock floor;

and monitoring the water level of the bottom of the dock in real time, and controlling the submersible pump to discharge the wastewater of the bottom of the dock outside the dock if the water level of the bottom of the dock is higher than the set safety height.