Automatic seawater flushing system and operation method thereof

Abstract

The invention belongs to the technical field of shipbuilding, and discloses an automatic seawater flushing system and an operation method thereof.The automatic seawater flushing system comprises a sea chest, a sea chest grid, a seawater filter, a flushing assembly control box and a bilge water tank, and seawater enters the sea chest after being filtered by the sea chest grid; the seawater filter is used for filtering seawater, then the seawater is filtered again through the seawater filter and then flows into a seawater main pipe, the flushing assembly is communicated with the seawater main pipe and the seawater filter and used for flushing the seawater filter, the control box is in communication connection with the flushing assembly to control opening and closing of the flushing assembly, and the bilge water tank is located below the seawater filter and communicated with the seawater filter. The device is used for discharging sewage. The workload of sailors is relieved through automatic cleaning operation, and potential safety hazards can be effectively reduced by cleaning the seawater filter in time.

Description

Technical Field

[0001] The present invention relates to the technical field of shipbuilding, and in particular to an automatic seawater flushing system and an operating method thereof. Background Art

[0002] Seawater systems on ships are often used to provide seawater for cooling and firefighting purposes. According to relevant specifications and design practices, ships are typically equipped with two seafloor gates, each equipped with a corresponding valve and seawater filter to filter the seawater. Grilles are often also installed on the seafloor gates to initially screen the seawater, ensuring that larger debris and marine organisms are removed. Seawater filters then perform a fine screening process, filtering out smaller debris and marine organisms. Ultimately, the filtered seawater is supplied to various water-using equipment to ensure the ship's water supply. Because the seawater filter performs the primary filtering function, its surface often accumulates a large amount of debris, marine organisms, and silt, affecting the water absorption efficiency of subsequent water-using equipment. Therefore, crew members are required to regularly open the seawater filter for manual cleaning to ensure proper operation and smooth flow of the seawater system. However, cleaning the seawater filter is not only time-consuming and labor-intensive, placing a heavy workload on the crew, but also poses a safety hazard to the ship if it is not cleaned promptly. Therefore, automated cleaning of the seawater filter remains a challenge currently facing researchers in this field. Summary of the Invention

[0003] The purpose of the present invention is to provide an automatic seawater flushing system and an operating method thereof, so as to reduce the workload of crew members through automated cleaning operations, and timely cleaning of seawater filters can effectively reduce safety hazards.

[0004] To achieve this object, the present invention adopts the following technical solutions:

[0005] An automatic seawater flushing system, comprising a seabed gate, a seabed grid, a seawater filter, and a flushing assembly. Seawater is filtered by the seabed grid before entering the seabed gate and then filtered again by the seawater filter before flowing into the seawater main. The flushing assembly is connected to the seawater main and the seawater filter, respectively, for flushing the seawater filter.

[0006] A control box and a bilge water tank, wherein the control box is communicatively connected to the flushing assembly to control the opening and closing of the flushing assembly, and the bilge water tank is located below the seawater filter and is connected to the seawater filter for discharging sewage.

[0007] Optionally, the seabed door, the seabed grid and the seawater filter are provided in at least two groups, and the flushing assembly can flush the two groups of the seawater filters respectively.

[0008] Optionally, the seawater filter includes a filter inlet, a filter outlet and a filter cavity, the filter inlet and the filter outlet are respectively arranged on opposite sides of the filter cavity, and both are connected to the filter cavity, and the flushing assembly is inserted into the filter cavity.

[0009] Optionally, the flushing assembly includes a flushing water pump, a connecting pipe and a flushing water pipe, the two ends of the flushing water pump are respectively connected to the seawater main and the connecting pipe, the connecting pipe is connected to the flushing water pipe, the flushing water pipe is inserted into the seawater filter, a flushing valve is provided on the flushing water pipe, and the control box can control the opening and closing of the flushing valve.

[0010] Optionally, the flushing water pipe is provided with a plurality of flushing holes for spraying small and dense water columns into the seawater filter.

[0011] Optionally, the flushing valve includes a first flushing valve and a second flushing valve, and the flushing water pipe includes a first flushing water pipe and a second flushing water pipe, the starting ends of the first flushing water pipe and the second flushing water pipe are both connected to the connecting pipe, and the ends of the first flushing water pipe and the second flushing water pipe are respectively inserted into the two sets of seawater filters;

[0012] The first flushing valve is provided on the first flushing water pipe for controlling the on-off of the flushing water path of one group of the seawater filters. The second flushing valve is provided on the second flushing water pipe for controlling the on-off of the flushing water path of another group of the seawater filters 3 .

[0013] Optionally, a first sensor and a second sensor are respectively provided at both ends of the seawater filter for detecting the pressure of the seawater inlet and outlet at both ends of the seawater filter. The control box can control the opening and closing of the flushing component according to the comparison result of the pressure difference between the two ends of the seawater filter and the preset value.

[0014] Optionally, a first valve, a second valve, and a third valve are provided between the seawater filter and the seabed gate, the seawater main pipe, and the bilge water tank, respectively;

[0015] When the first valve and the second valve are both opened and the third valve is closed, the seawater is filtered by the seawater filter and then enters the seawater main pipe;

[0016] When the first valve and the second valve are both closed and the third valve is opened, the seawater or sewage in the seawater filter can enter the bilge water tank.

[0017] Optionally, a fourth valve is provided between the flushing assembly and the seawater main pipe. When the fourth valve is opened, the flushing assembly can absorb water from the seawater main pipe 61 .

[0018] An operating method for an automatic flushing seawater system, wherein the automatic flushing seawater system is used to perform an automatic flushing operation, comprising the following steps:

[0019] The pressure on both sides of the seabed grid is detected and the pressure difference is calculated. When the pressure difference reaches the preset value, the control box controls the flushing component to start;

[0020] Close the waterways between the seawater filter and the sea bottom door, and between the seawater filter and the seawater main, and open the waterway between the seawater filter and the bilge tank;

[0021] After the seawater in the seawater filter is discharged into the bilge tank, open the waterway between the seawater filter and the flushing assembly, as well as the waterway between the flushing assembly and the seawater main;

[0022] The flushing assembly draws water from the seawater main and sprays it into the seawater filter to flush out dirt, and the sewage is discharged into the bilge tank;

[0023] After the flushing time of the flushing component reaches the preset time, the control box controls the flushing operation of the flushing component to be shut down, and sequentially closes the waterways between the flushing component and the seawater main, between the seawater filter and the flushing component, and between the seawater filter and the bilge water tank, and then opens the waterways between the seawater filter and the seabed door, and between the seawater filter and the seawater main to complete automatic flushing.

[0024] Beneficial effects of the present invention:

[0025] The present invention enables preliminary screening of seawater through a seabed grid, and further fine-screening of the initially screened seawater through a seawater filter to remove garbage and marine organisms of varying sizes. Simultaneously, a flushing assembly flushes the seawater filter to prevent garbage, marine organisms, silt, and the like from clogging the filter and affecting the smooth flow of the seawater system. Specifically, the present invention utilizes a control box communicatively connected to the flushing assembly to control its opening and closing, achieving automated flushing and eliminating the need for crew members to perform regular inspections, thereby reducing their workload. Furthermore, the bilge tanks enable centralized discharge and treatment of sewage, further improving cleaning and treatment efficiency and ensuring the quality of the vessel's water. BRIEF DESCRIPTION OF THE DRAWINGS

[0026] Figure 1 is a schematic diagram of an automatic seawater flushing system according to an embodiment of the present invention;

[0027] Figure 2 It is a structural schematic diagram of a seawater filter in an automatic seawater flushing system according to an embodiment of the present invention.

[0028] In the picture:

[0029] 100 - control box; 200 - bilge tank; 10 - seabed door; 20 - seabed grid; 30 - seawater filter; 41 - first sensor; 42 - second sensor; 51 - first valve; 52 - second valve; 201 - third valve; 202 - sewage pipe;

[0030] 61 - flushing water pump; 62 - fourth valve; 63 - first flushing valve; 64 - second flushing valve; 601 - seawater main; 602 - connecting pipe; 603 - first flushing water pipe; 604 - second flushing water pipe;

[0031] 301 - filter inlet; 302 - filter outlet; 303 - filter inner cavity; 304 - first connection port; 305 - second connection port. DETAILED DESCRIPTION

[0032] The following describes embodiments of the present invention in detail. Examples of the embodiments are shown in the accompanying drawings, wherein the same or similar reference numerals throughout represent the same or similar components or components having the same or similar functions. The embodiments described below with reference to the accompanying drawings are exemplary and are intended to explain the present invention, but are not to be construed as limiting the present invention.

[0033] In the description of the present invention, unless otherwise expressly specified or limited, the terms "connected," "connected," and "fixed" should be understood in a broad sense. For example, they may refer to fixed or detachable connections, mechanical or electrical connections, direct or indirect connections through an intermediate medium, and internal communication between two elements or interaction between two elements. Those skilled in the art will understand the specific meanings of the above terms in the present invention based on specific circumstances.

[0034] In the description of the present invention, unless otherwise expressly specified or limited, a first feature being "above" or "below" a second feature may include the first feature being in direct contact with the second feature, or may include the first feature being in contact with the second feature through another feature between them instead of being in direct contact. Moreover, a first feature being "above," "above," and "above" a second feature may include the first feature being directly above or obliquely above the second feature, or may simply mean that the first feature is higher in level than the second feature. A first feature being "below," "below," and "below" a second feature may include the first feature being directly below or obliquely below the second feature, or may simply mean that the first feature is lower in level than the second feature.

[0035] The technical solution of this embodiment will be further described below with reference to the accompanying drawings and through specific implementation methods.

[0036] like Figure 1-Figure 2As shown, this embodiment provides an automatic seawater flushing system, including a seabed gate 10, a seabed grid 20, a seawater filter 30, a flushing component, a control box 100 and a bilge water tank 200. The seawater enters the seabed gate 10 after being filtered by the seabed grid 20, and then flows into the seawater main pipe 601 after being filtered again through the seawater filter 30. The flushing component is respectively connected to the seawater main pipe 601 and the seawater filter 30 for flushing the seawater filter 30. The control box 100 is communicatively connected to the flushing component to control the opening and closing of the flushing component. The bilge water tank 200 is located below the seawater filter 30 and is connected to the seawater filter 30 for discharging sewage.

[0037] The method for operating the automatic flushing seawater system comprises the following steps:

[0038] The pressure on both sides of the seabed grid 20 is detected and the pressure difference is calculated. When the pressure difference reaches a preset value, the control box 100 controls the flushing component to start;

[0039] Close the waterways between the seawater filter 30 and the seabed door 10, and between the seawater filter 30 and the seawater main 601, and open the waterway between the seawater filter 30 and the bilge tank 200;

[0040] After the seawater in the seawater filter 30 is discharged into the bilge tank 200, the waterway between the seawater filter 30 and the flushing assembly, as well as the waterway between the flushing assembly and the seawater main 601 are opened;

[0041] The flushing assembly draws water from the seawater main 601 and sprays it into the seawater filter 30 to flush out dirt, and the sewage is discharged into the bilge tank 200;

[0042] After the flushing time of the flushing component reaches the preset time, the control box 100 controls the flushing operation of the flushing component to be closed, and sequentially closes the waterways between the flushing component and the seawater main 601, between the seawater filter 30 and the flushing component, and between the seawater filter 30 and the bilge water tank 200, and then opens the waterways between the seawater filter 30 and the seabed door 10, and between the seawater filter 30 and the seawater main 601 to complete automatic flushing.

[0043] Specifically, in this embodiment, the seawater can be initially screened through the seabed grid 20, and the seawater filter 30 can further fine-screen the initially screened seawater to remove garbage and marine organisms of varying sizes. Simultaneously, the flushing assembly can flush the seawater filter 30 to prevent garbage, marine organisms, silt, and the like from clogging the seawater filter 30 and affecting the smooth flow of the seawater system. Specifically, in this embodiment, the control box 100 is communicatively connected to the flushing assembly to control the opening and closing of the flushing assembly, achieving automated flushing, eliminating the need for regular inspections by the crew and reducing their workload. Furthermore, the bilge tank 200 can be used to centrally discharge and treat sewage, further improving cleaning and treatment efficiency and ensuring the quality of the ship's water.

[0044] The specific structure of the automatic seawater flushing system in this embodiment is described below.

[0045] like Figure 1 As shown, the automatic seawater flushing system in this embodiment includes a control box 100, a seabed gate 10, a seabed grid 20, a seawater filter 30, a flushing assembly, and a bilge tank 200. Specifically, the seabed grid 20 is arranged on the seabed gate 10. After being filtered by the seabed grid 20, the seawater enters the seabed gate 10, and is filtered again by the seawater filter 30 before flowing into the seawater main pipe 601. It is then connected to various water-using equipment on the ship to meet the ship's water needs. Optionally, the two ends of the flushing assembly in this embodiment can be connected to the seawater main pipe 601 and the seawater filter 30 respectively. Therefore, when the seawater filter 30 is blocked, the flushing assembly draws water from the seawater main pipe 601 and can spray water into the seawater filter 30 to flush out dirt on the seawater filter 30, ensuring the normal operation of the seawater filter 30.

[0046] Furthermore, the automatic seawater flushing system is equipped with a control box 100, which communicates with the flushing assembly and other components through the control box 100, enabling the opening and closing of the flushing assembly and the automatic opening and closing of corresponding operations, thereby achieving automated operation. Specifically, the bilge water tank 200 is located below the seawater filter 30 and is connected to the seawater filter 30. This allows sewage to be discharged and collected in the bilge water tank 200 by gravity, preventing sewage generated by the flushing operation from flowing into the seawater main 601 and contaminating the water used by various equipment on the ship.

[0047] Combine Figure 1 and Figure 2As shown, in this embodiment, at least two groups of seabed gates 10, seabed grids 20, and seawater filters 30 are provided, and the flushing assembly can flush the two groups of seawater filters 30 separately, thereby improving the ship's water use efficiency and automatic flushing efficiency, avoiding manual work while ensuring that each group of equipment can operate smoothly. For example, in this embodiment, the gap between the seabed grids 20 is set to 20mm, thereby filtering larger garbage and marine organisms to ensure that larger debris in the seawater can be filtered. Furthermore, in this embodiment, the filter mesh aperture in the seawater filter 30 is set to 5-6mm, thereby filtering out smaller garbage and marine organisms, ensuring the quality of the ship's water.

[0048] Specifically, the seawater filter 30 includes a filter inlet 301, a filter outlet 302, and a filter cavity 303. A first connection port 304 is provided at the bottom of the seawater filter 30, and a second connection port 305 is provided at the top. Optionally, the filter inlet 301 and the filter outlet 302 are disposed on opposite sides of the filter cavity 303 and are both connected to the filter cavity 303. A filter screen is disposed within the filter cavity 303. Thus, seawater filtered by the submarine grid 20 enters the filter cavity 303 through the filter inlet 301, is filtered again, and then flows out through the filter outlet 302 into the seawater main 601. Optionally, the first connection port 304 is used to connect to the bilge tank 200, thereby facilitating the gravity entry of seawater or sewage into the bilge tank 200. Furthermore, the second connection port 305 is used to connect to a flushing assembly, ensuring that the flushing assembly can enter the top of the seawater filter 30 to flush the interior. For example, in this embodiment, the flushing component is inserted into the filter cavity 303, so that the filter cavity 303 can be fully flushed, so that the garbage, marine organisms, mud and sand on the surface of the internal filter are washed away, avoiding affecting the water absorption of the water-using equipment.

[0049] like Figure 1As shown, in this embodiment, a first sensor 41 and a second sensor 42 are respectively provided at both ends of the seawater filter 30 to detect the pressure of the seawater inlet and outlet at both ends of the seawater filter 30. This allows the control box 100 to control the opening and closing of the flushing assembly based on the comparison of the pressure difference between the two ends of the seawater filter 30 and a preset value, thereby achieving an automated cleaning effect for the seawater filter 30. For example, the first sensor 41 is provided between the filter inlet 301 and the seabed door 10 to detect the pressure of the seawater before it enters the seawater filter 30. The second sensor 42 is provided between the filter outlet 302 and the seawater main 601 to detect the pressure of the seawater after it is filtered through the seawater filter 30. The pressure difference between the two sensors can directly reflect the degree of clogging of the seawater filter 30, that is, the degree of accumulation of dirt on the filter screen of the seawater filter 30. Furthermore, based on the comparison between the pressure difference and the preset value, automated cleaning can be performed when the preset value is reached, thereby ensuring that the seawater filter 30 is always in good working condition, thereby ensuring the efficiency and quality of water use on the ship.

[0050] Furthermore, in this embodiment, the automatic seawater flushing system is equipped with several valves, all of which are communicatively connected to the control box 100 to achieve automated opening and closing of various waterways. Specifically, a first valve 51, a second valve 52, and a third valve 201 are respectively installed between the seawater filter 30 and the seafloor gate 10, the seawater main 601, and the bilge tank 200 to control the opening and closing of these three waterways. For example, the bilge tank 200 is located at the bottom of the system and is equipped with a sewage pipe 202, on which the third valve 201 is installed. Accordingly, the first valve 51 is located between the first sensor 41 and the seafloor gate 10, the second valve 52 is located on the seawater main 601, and the second sensor 42 is located between the second valve 52 and the seawater filter 30. This ensures more accurate detection values from the first and second sensors 41 and 42, while also enabling the first and second valves 51 and 52 to automatically open and close the waterways on both sides of the seawater filter 30.

[0051] For example, in this embodiment, when both the first valve 51 and the second valve 52 are open and the third valve 201 is closed, seawater is filtered through the seawater filter 30 and enters the seawater main pipe 601. When both the first valve 51 and the second valve 52 are closed and the third valve 201 is open, seawater or sewage in the seawater filter 30 can enter the bilge tank 200 through the sewage pipe 202, thereby achieving normal filtration and use of seawater and facilitating cleaning of the seawater filter 30 with the waterways at both ends closed, thereby avoiding water contamination. Specifically, the filter inlet 301 is used to connect to the first valve 51, and the filter outlet 302 is used to connect to the second valve 52.

[0052] For example, in this embodiment, the two sets of seabed doors 10, seabed grids 20, seawater filters 30, first sensors 41, second sensors 42, first valves 51, second valves 52 and third valves 202 are configured identically, and both sets of equipment are collected in the same bilge tank 200 through sewage pipes 202, and each valve and equipment is connected to the same control box 100 via cables and is automatically controlled by the control box 100.

[0053] like Figure 1 As shown, the flushing assembly in this embodiment includes a flushing water pump 61, a connecting pipe 602 and a flushing water pipe. Specifically, the two ends of the flushing water pump 61 are respectively connected to the seawater main 601 and the connecting pipe 602, and the other end of the connecting pipe 602 is connected to the flushing water pipe, and the flushing water pipe can be inserted into the filter cavity 303 of the seawater filter 30 to flush the filter cavity 303. For example, a number of flushing holes are provided on the flushing water pipe to facilitate the spraying of small and dense water columns into the seawater filter 30 to flush the filter screen and internal dirt to avoid blockage. Furthermore, a flushing valve is also provided on the flushing water pipe, so that the opening and closing of the flushing valve can be controlled by the control box 100, thereby ensuring the automated flushing operation of the two systems.

[0054] Combine Figure 1 and Figure 2 As shown, optionally, in this embodiment, the flushing valve includes a first flushing valve 63 and a second flushing valve 64, and the flushing water pipe includes a first flushing water pipe 603 and a second flushing water pipe 604. The starting ends of the first flushing water pipe 603 and the second flushing water pipe 604 are both connected to the connecting pipe 602, and the ends of the first flushing water pipe 603 and the second flushing water pipe 604 are respectively inserted into the filter cavities 303 of the two groups of seawater filters 30, thereby enabling the two groups of seawater filters 30 to be flushed separately. Furthermore, the first flushing valve 63 is provided on the first flushing water pipe 603 to control the on-off of the flushing water path of one group of seawater filters 30, and the second flushing valve 64 is provided on the second flushing water pipe 604 to control the on-off of the flushing water path of the other group of seawater filters 30, thereby achieving separate cleaning of the two groups of seawater filters 30 and improving cleaning efficiency. Accordingly, if multiple groups of seawater filters 30 are provided in this embodiment, the flushing valves and flushing water pipes are provided in a one-to-one correspondence with the seawater filters 30.

[0055] Furthermore, a fourth valve 62 is provided between the flushing assembly and the seawater main 601, thereby controlling the connection between the flushing water pump 61 and the seawater main 601. Specifically, when the fourth valve 62 is open, the flushing water pump 61 in the flushing assembly can draw water from the seawater main 601, thereby ensuring the quality of the flushing water source and preventing secondary contamination of the seawater filter 30. Furthermore, when the fourth valve 62 is closed, the flushing assembly cannot draw water and is in a non-operating state. This, combined with the closure of the first flushing valve 63 and the second flushing valve 64, ensures that debris will not accumulate in the upper and lower channels of the flushing water pump 61, contaminating the water used for the next flush.

[0056] The following describes the method for automatically flushing the seawater system in this embodiment.

[0057] In this embodiment, the automated operation using the automatic seawater flushing system includes the following steps:

[0058] The pressure on both sides of the seabed grid 20 is detected and the pressure difference is calculated. When the pressure difference reaches a preset value, the control box 100 controls the flushing component to start;

[0059] Close the waterways between the seawater filter 30 and the seabed door 10, and between the seawater filter 30 and the seawater main 601, and open the waterway between the seawater filter 30 and the bilge tank 200;

[0060] After the seawater in the seawater filter 30 is discharged into the bilge tank 200, the waterway between the seawater filter 30 and the flushing assembly, as well as the waterway between the flushing assembly and the seawater main 601 are opened;

[0061] The flushing assembly draws water from the seawater main 601 and sprays it into the seawater filter 30 to flush out dirt, and the sewage is discharged into the bilge tank 200;

[0062] After the flushing time of the flushing component reaches the preset time, the control box 100 controls the flushing operation of the flushing component to be closed, and sequentially closes the waterways between the flushing component and the seawater main 601, between the seawater filter 30 and the flushing component, and between the seawater filter 30 and the bilge water tank 200, and then opens the waterways between the seawater filter 30 and the seabed door 10, and between the seawater filter 30 and the seawater main 601 to complete automatic flushing.

[0063] Specifically, in this embodiment, a first sensor 41 and a second sensor 42 are respectively installed at the inlet and outlet of the seawater filter 30. These two sensors can detect the pressure on both sides of the seafloor grid 20. By taking the difference between the pressure values detected by the two sensors and comparing them with a preset value, it can be determined whether the blockage level of the seawater filter 30 requires cleaning. This eliminates manual repeated checks and achieves intelligent operation. Furthermore, the control box 100 is equipped with a control program that activates the flushing component when the pressure difference reaches a preset value, thereby automating the cleaning operation.

[0064] Furthermore, the first valve 51 and the second valve 52 are preferentially closed to block the passage of seawater on both sides of the seafloor grid 20, thereby preventing seawater from continuously inflowing or contaminating the water quality in the seawater main 601. Subsequently, opening the third valve 201 allows the seawater inside the seawater filter 30 to be promptly discharged into the bilge tank 200, thereby keeping the seawater filter 30 free of water, facilitating subsequent flushing and improving cleaning efficiency. Optionally, a discharge time can be set, i.e., a delay time is set after opening the third valve 201. After the delay time is reached, the flushing valve and the fourth valve 62 are automatically opened, and the flushing pump 61 is activated, so that the flushing pump 61 can draw water from the seawater main 601, pressurize it, and supply it to the flushing water pipe inside the seawater filter 30. The flushing water pipe sprays dense and fine water jets through the dense flushing holes to flush away dirt on the internal filter screen. The dirty water mixed with dirt is then collected in the bilge tank 200 through the sewage pipe 202 at the bottom under the action of gravity. For example, a flushing time can also be set so that the entire flushing program can be automatically stopped after the flushing time is reached.

[0065] Specifically, when stopping flushing, the flushing water pump 61 is first shut down, followed by the fourth valve 62, the flushing valve, and the third valve 201. The first valve 51 and the second valve 52 are then sequentially opened to complete the automated cleaning process and ensure the normal delivery of seawater. For example, in addition to the automated program, the automatic seawater flushing system of this embodiment may also include a manual flushing program. For example, a manual flushing button may be provided on the control box 100. An operator may press the manual flushing button to initiate the automated flushing process.

[0066] Obviously, the above embodiments of the present invention are merely examples for the purpose of clearly illustrating the present invention, and are not intended to limit the embodiments of the present invention. Those skilled in the art will appreciate that other variations or modifications can be made based on the above description. It is not necessary and impossible to enumerate all embodiments here. Any modifications, equivalent substitutions, and improvements made within the spirit and principles of the present invention shall be included within the scope of protection of the claims of the present invention.

Claims

1. Automatic seawater flushing system, characterized by: include: A seabed gate (10), a seabed grid (20), a seawater filter (30) and a flushing assembly. Seawater is filtered by the seabed grid (20) and then enters the seabed gate (10). The seawater is then filtered again by the seawater filter (30) and flows into the seawater main pipe (601). The flushing assembly is respectively connected to the seawater main pipe (601) and the seawater filter (30) for flushing the seawater filter (30). A control box (100) and a bilge water tank (200), wherein the control box (100) is communicatively connected to the flushing assembly to control the opening and closing of the flushing assembly, and the bilge water tank (200) is located below the seawater filter (30) and is connected to the seawater filter (30) for discharging sewage.

2. The automatic seawater flushing system according to claim 1, characterized in that: At least two groups of the seabed door (10), the seabed grid (20) and the seawater filter (30) are provided, and the flushing assembly can flush the two groups of the seawater filters (30) respectively.

3. The automatic seawater flushing system according to claim 1, characterized in that: The seawater filter (30) comprises a filter inlet (301), a filter outlet (302) and a filter inner cavity (303); the filter inlet (301) and the filter outlet (302) are respectively arranged on opposite sides of the filter inner cavity (303), and both are connected to the filter inner cavity (303); the flushing assembly is inserted into the filter inner cavity (303).

4. The automatic seawater flushing system according to claim 2, characterized in that: The flushing assembly comprises a flushing water pump (61), a connecting pipe (602) and a flushing water pipe. The two ends of the flushing water pump (61) are respectively connected to the seawater main pipe (601) and the connecting pipe (602). The connecting pipe (602) is connected to the flushing water pipe. The flushing water pipe is inserted into the seawater filter (30). A flushing valve is provided on the flushing water pipe, and the control box (100) can control the opening and closing of the flushing valve.

5. The automatic seawater flushing system according to claim 4, characterized in that: The flushing water pipe is provided with a plurality of flushing holes for spraying small and dense water columns into the seawater filter (30).

6. The automatic seawater flushing system according to claim 4, characterized in that: The flushing valve comprises a first flushing valve (63) and a second flushing valve (64); the flushing water pipe comprises a first flushing water pipe (603) and a second flushing water pipe (604); the starting ends of the first flushing water pipe (603) and the second flushing water pipe (604) are both connected to the connecting pipe (602); and the ends of the first flushing water pipe (603) and the second flushing water pipe (604) are respectively inserted into the two groups of seawater filters (30); The first flushing valve (63) is provided on the first flushing water pipe (603) and is used to control the on-off of the flushing water path of one group of the seawater filters (30). The second flushing valve (64) is provided on the second flushing water pipe (604) and is used to control the on-off of the flushing water path of another group of the seawater filters (30).

7. The automatic seawater flushing system according to claim 1, characterized in that: A first sensor (41) and a second sensor (42) are respectively provided at both ends of the seawater filter (30) for detecting the pressure of the seawater inlet and outlet at both ends of the seawater filter (30). The control box (100) can control the opening and closing of the flushing component according to the comparison result of the pressure difference between the two ends of the seawater filter (30) and a preset value.

8. The automatic seawater flushing system according to claim 1, characterized in that: A first valve (51), a second valve (52), and a third valve (201) are respectively provided between the seawater filter (30) and the seabed gate (10), the seawater main pipe (601), and the bilge water tank (200); When the first valve (51) and the second valve (52) are both opened and the third valve (201) is closed, the seawater is filtered by the seawater filter (30) and then enters the seawater main pipe (601); When the first valve (51) and the second valve (52) are both closed and the third valve (201) is opened, seawater or sewage in the seawater filter (30) can enter the bilge water tank (200).

9. The automatic seawater flushing system according to claim 1, characterized in that: A fourth valve (62) is provided between the flushing assembly and the seawater main pipe (601). When the fourth valve (62) is opened, the flushing assembly can absorb water from the seawater main pipe (601).

10. The method for automatically flushing a seawater system is characterized in that: The automatic flushing seawater system according to any one of claims 1 to 9 is used to perform an automatic flushing operation, comprising the following steps: The pressure on both sides of the seabed grid (20) is detected and the pressure difference is calculated. When the pressure difference reaches a preset value, the control box (100) controls the flushing component to start; Close the waterway between the seawater filter (30) and the seabed door (10), and between the seawater filter (30) and the seawater main (601), and open the waterway between the seawater filter (30) and the bilge tank (200); After the seawater in the seawater filter (30) is discharged into the bilge water tank (200), the waterway between the seawater filter (30) and the flushing assembly, and the waterway between the flushing assembly and the seawater main (601) are opened; The flushing assembly absorbs water from the seawater main (601) and sprays it into the seawater filter (30) to flush away dirt, and the sewage is discharged into the bilge tank (200); After the flushing time of the flushing component reaches a preset time, the control box (100) controls the flushing operation of the flushing component to be closed, and sequentially closes the waterways between the flushing component and the seawater main pipe (601), between the seawater filter (30) and the flushing component, and between the seawater filter (30) and the bilge water tank (200), and then opens the waterways between the seawater filter (30) and the seabed door (10), and between the seawater filter (30) and the seawater main pipe (601) to complete automatic flushing.

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