Sand cleaning device for seawater tank

Abstract

The utility model relates to a seawater tank silt cleaning device which comprises a seawater tank, the seawater tank is cylindrical, a water flow flushing pipeline and a gas flushing pipeline are arranged on the side wall of the seawater tank at equal angles at intervals, the water flow flushing pipeline and the gas flushing pipeline cut into the side wall of the seawater tank at equal angles, and the water flow flushing pipeline and the gas flushing pipeline incline downwards at equal angles. Water flow / air flow rushing into the seawater tank forms rotational flow rotating downwards in the seawater tank, so that silt on the inner wall of the seawater tank is scoured; the middle of a bottom plate of the seawater tank is provided with a circular seabed grating, and one or more circles of quicksand holes are formed in the periphery of the bottom plate. Water flow flushing and gas flushing are arranged in the downward rotation direction, downward rotational flow is formed, the cleaning work of automatically removing silt of the seawater tank is achieved, the cleaning cost of the seawater tank is reduced, and the cleaning efficiency is improved.

Description

Technical Field

[0001] The utility model relates to a seawater tank silt cleaning device, belonging to the technical field of ship design. Background Art

[0002] Seawater tanks are typically installed on the bottom of a ship, with a grid at the bottom that connects directly to the seawater. This serves as the entry point for seawater to enter the ship via pumps. Traditional seawater tank designs typically utilize a rectangular shape, superimposed on a grid of the ship's outer plate profiles, making it more susceptible to sediment accumulation. Furthermore, the inner walls of seawater tanks often require structural components such as reinforcing ribs and T-shaped profiles, making cleaning more difficult. Currently, divers typically penetrate beneath the ship, open the grid, and enter the seawater tank to clean the sediment adhering to the inner walls. Major ports around the world, where rivers meet the sea, are key hubs for global trade, but they are also plagued by the massive accumulation of sediment, a problem that has plagued the shipping industry. Utility Model Content

[0003] The purpose of the utility model is to provide a seawater tank silt cleaning device and a cleaning method thereof, so as to solve the problems of high cost and low efficiency in the prior art of seawater tank silt cleaning.

[0004] The utility model adopts the following technical solutions:

[0005] A seawater tank silt cleaning device comprises a cylindrical seawater tank with water flushing pipes and gas flushing pipes arranged at equal angles on the tank sidewalls. The water flushing pipes and gas flushing pipes intersect the tank sidewalls at equal angles and are both tilted downward at equal angles. This creates a downward-spinning vortex of water / air entering the tank, thereby flushing silt from the tank inner wall. A circular seabed grille 1 is located in the center of the tank's bottom plate, surrounded by one or more circles of quicksand openings 2. The cylindrical structure is stronger than a rectangular structure, thus allowing for more openings.

[0006] Preferably, the seawater tank is perpendicular to the base surface of the ship, and the bottom plate of the seawater tank is tilted to adapt to the inclination angle of the bottom of the stern.

[0007] Furthermore, the seabed grid 1 is arranged at the center of the bottom plate.

[0008] Preferably, the water flushing pipeline and the gas flushing pipeline are inclined downward at an angle of 25-35°.

[0009] Preferably, the water flushing pipeline and the gas flushing pipeline are welded and fixed to the openings on the side wall of the seawater tank, and are connected to an elbow through a flange, and the angle of the elbow is selected to adapt to the direction of the pipeline in the ship.

[0010] Preferably, the cylindrical inner wall of the seawater tank is not provided with a profile reinforcement structure, and the inner surface of the seawater tank is smooth.

[0011] Preferably, the water flushing pipeline and the gas flushing pipeline are each provided with two lines, the water pipe of the water flushing pipeline is connected to the fire fighting cabin, and the gas pipe of the gas flushing pipeline is connected to the cabin compression system.

[0012] Furthermore, it also includes an intelligent cleaning control system. The intelligent cleaning system uses valve remote control and pump start and stop remote control. Through the seawater sand content data of various sea areas in different seasons, it intelligently and autonomously provides ship operators with fully automatic and semi-automatic solutions for system use, assisting and guiding crew members to solve the cleaning problems of seawater tanks.

[0013] A method for cleaning silt from a seawater tank employs the aforementioned silt cleaning device and is divided into two modes: daily cleaning and offshore centralized cleaning. Daily cleaning: In offshore waters with a large amount of silt deposits, the high-pressure gear of the main fire pump or standby pump is activated, and high-pressure seawater is ejected downward at a 30-degree angle from the inner tangent surface of a cylindrical seawater tank. Turbulent flow sweeps the smooth inner surface of the cylinder in a spiral downward, causing the entire sand-laden seawater in the seawater tank to rotate, similar to the relative motion of the water and the wash tub in a drum washing machine after it is filled with water. Simultaneously, compressed air is blown through the seabed grid to reduce the adhesion of silt and push it out of the seawater tank. Offshore centralized cleaning: After loading or unloading, the tank departs the port and enters the high seas, where a one-time centralized cleaning of silt is performed. The first step is to confirm that the seabed door is unobstructed and temporarily close the seawater tank air pipe. The second step is to inject compressed air to push the seawater level in the seawater tank out of the seabed grid, creating an air cavity in the seawater tank. The third step is to operate two water flow flushing pipes, where the compressed air and seawater intertwine and flush away the attached silt along the inner wall of the cylinder. Achieve the effect of thorough cleaning.

[0014] The beneficial effects of the present invention are as follows: a cylindrical seawater tank structure is adopted, and the structural strength of the cylindrical shape itself is better than that of a rectangular parallelepiped. Therefore, after the local wall thickness is thickened through stress analysis, the inner wall does not need to be provided with structural parts such as T-shaped materials, thereby improving the smoothness of the inner wall. Combined with the water flushing and gas flushing arranged in the rotating downward direction, a downward vortex is formed, thereby realizing the automatic desilting and cleaning work of the seawater tank, reducing the cleaning cost of the seawater tank and improving the cleaning efficiency. BRIEF DESCRIPTION OF THE DRAWINGS

[0015] Figure 1 This is a structural design drawing of a seawater tank silt cleaning device of the present invention.

[0016] Figure 2 yes Figure 1 Detailed view of the submarine grid installation from the perspective of center A.

[0017] Figure 3 This is a schematic diagram of the installation of the nozzle on the side wall of the seawater tank.

[0018] Figure 4 yes Figure 3 Axial section of part B in the figure.

[0019] In the picture, 1. Seabed grid, 2. Quicksand opening, 3. Seawater pipe. DETAILED DESCRIPTION

[0020] The present invention will be further described below with reference to the accompanying drawings and specific embodiments.

[0021] See also Figure 1-4 A seawater tank silt cleaning device includes a cylindrical seawater tank with water flushing pipes and gas flushing pipes arranged at equal angles on the sidewalls. The water flushing pipes and gas flushing pipes intersect the sidewalls at equal angles and are inclined downward at equal angles. This creates a downward-spinning vortex of water / air entering the seawater tank, thereby flushing silt from the inner walls of the seawater tank. The bottom plate of the seawater tank has a circular seabed grille 1 in the middle, surrounded by one or more circles of quicksand openings 2. The cylindrical structure is stronger than a rectangular structure, thus allowing for more openings.

[0022] Figure 1 The seawater pipe 3 is used to connect the water in the seawater tank to the seawater pump inside the ship, and to pump the water in the seawater tank into the water storage tank inside the ship.

[0023] In this embodiment, see Figure 1 The seawater tank is perpendicular to the base surface of the ship, and the bottom plate of the seawater tank is tilted to adapt to the inclination angle of the bottom of the stern.

[0024] Continue to see Figure 1 The seabed grid 1 is arranged at the center of the bottom plate.

[0025] In this embodiment, combined Figure 3 and Figure 4 The water flushing pipeline and the gas flushing pipeline are inclined downward at an angle of 25-35°.

[0026] In this embodiment, see Figure 3 The water flushing pipeline and the gas flushing pipeline are welded and fixed to the openings on the side wall of the seawater tank, and are connected to an elbow through a flange. The angle of the elbow is selected to adapt to the direction of the pipeline in the ship.

[0027] In this embodiment, the cylindrical inner wall of the seawater tank is not provided with a profile reinforcement structure, and the inner surface of the seawater tank is smooth.

[0028] In this embodiment, see Figure 1 The water flushing pipeline and the gas flushing pipeline are each provided with two routes. The water pipe of the water flushing pipeline is connected to the fire fighting cabin, and the gas pipe of the gas flushing pipeline is connected to the cabin compression system.

[0029] In this embodiment, an intelligent cleaning control system is also included. The intelligent cleaning system uses valve remote control and pump start and stop remote control. Through the seawater sand content data of various sea areas in different seasons, it intelligently and autonomously provides ship operators with fully automatic and semi-automatic solutions for system use, assisting and guiding crew members to solve the cleaning problems of seawater tanks.

[0030] A method for cleaning silt in a seawater tank, using the above-mentioned silt cleaning device, is divided into two modes: daily cleaning and offshore centralized cleaning:

[0031] Daily cleaning: In offshore areas with significant sediment accumulation, the main firefighting pump or a backup pump is activated at high pressure, ejecting high-pressure seawater at a 30-degree angle downward from the inner tangent of a cylindrical seawater tank. Turbulent flow sweeps downward in a spiral against the relatively smooth inner surface of the cylinder, creating a rotation of the sand-laden seawater within the tank, similar to the relative motion of the water and the washbasin in a drum washing machine after it is filled. Simultaneously, compressed air is activated through the conventionally configured seafloor grid to purge the bottom sand. This not only reduces the adhesion of sediment but, more importantly, pushes the bulk of the sediment out of the tank.

[0032] Offshore centralized cleaning: loading or unloading is carried out after leaving the port and entering the high seas, and the mud and sand are cleaned away in a one-time centralized manner.

[0033] The first step is to temporarily close the seawater tank air pipe (make sure the seabed door is not blocked).

[0034] The second step is to inject compressed air to push the seawater level in the seawater tank out of the seabed grid. This creates an air cavity in the seawater tank.

[0035] The third step is to open the two seawater flushing pipes. The compressed air and seawater intertwine and increase the impact force significantly, washing away the attached sediment along the inner wall of the cylinder, achieving a thorough cleaning effect.

[0036] The design points in this utility model are as follows:

[0037] Cylindrical seawater tank design: The seawater tank is made into a cylinder with a horizontal top plate and an outer bottom plate. The outer edge of the lower outer plate of the seawater tank has as many quicksand openings as possible. The seabed grid is arranged in a circular shape. The circular arrangement of the seabed grid helps to improve the efficiency of sediment outflow.

[0038] The cylinder is perpendicular to the ship's base. This also reduces the placement of other structural components and outfitting that could cause protrusions. The coating added to the inner surface of the cylindrical seawater tank smoothes the surface and reduces surface friction.

[0039] Simplified structural design: With a moderate increase in the thickness of local steel plates, according to finite element calculations, the inner wall of the cylindrical seawater tank, including the top plate and the outer plate, does not require reinforcing ribs, T-profiles and other structural parts, and the surface can be smooth and unobstructed. At the same time, because the bottom (outer plate) of the cylindrical seawater tank is a non-stressed area, a large number of quicksand holes can be added when the spacing between the quicksand holes is greater than the hole diameter, and the quicksand outflow efficiency can also be greatly improved.

[0040] Flushing system design: Two seawater flushing branches are installed, each tangent to the cylindrical surface. The centerline of the pipe and the circular section of the cylinder tangent to the cylinder form a 30-degree downward spray direction. The two connections are symmetrical along the cylinder centerline. Additionally, two compressed air flushing branches are installed, each tangent to the cylindrical surface. The centerline of the pipe and the circular section of the cylinder tangent to the cylinder form a 30-degree downward spray direction. The two connections are symmetrical along the cylinder centerline. The four connections are arranged symmetrically in the same plane, with intervals of 90 degrees.

[0041] Intelligent control of the cleaning system: The cleaning system uses remote control of valves and pump start and stop, and conducts big data analysis of seawater sand content in various sea areas in different seasons. It intelligently and autonomously provides ship operators with fully automatic and semi-automatic solutions for system use, assisting and guiding crew members in solving seawater tank cleaning problems.

[0042] The utility model adopts a cylindrical seawater tank structure design. The structural strength of the cylindrical shape is better than that of a rectangular parallelepiped. Therefore, after the local wall thickness is thickened through stress analysis, the inner wall does not need to be provided with structural parts such as T-shaped materials, thereby improving the smoothness of the inner wall. Combined with the water flushing and gas flushing arranged in the rotating downward direction, a downward vortex is formed to realize the automatic desilting and cleaning work of the seawater tank, thereby reducing the cleaning cost of the seawater tank and improving the cleaning efficiency.

[0043] The above are preferred embodiments of the present invention. Ordinary technicians in this field can also make their own changes or improvements on this basis. Without departing from the overall concept of the present invention, these changes or improvements should fall within the scope of protection required by the present invention.

Claims

1. A seawater tank silt cleaning device, comprising a seawater tank, characterized in that: The seawater tank is cylindrical. Water flushing pipes and gas flushing pipes are arranged alternately at equal angles on the side wall of the seawater tank. The water flushing pipes and gas flushing pipes are cut into the side wall of the seawater tank at equal angles and are both tilted downward at equal angles, so that the water flow / air flow entering the seawater tank forms a downward rotating vortex in the seawater tank, thereby flushing the silt on the inner wall of the seawater tank; The bottom plate of the seawater tank has a circular seabed grid (1) in the middle, and one or more circles of quicksand openings (2) are arranged around the bottom plate.

2. The seawater tank silt cleaning device according to claim 1, characterized in that: The seawater tank is perpendicular to the base surface of the ship, and the bottom plate of the seawater tank is tilted to adapt to the inclination angle of the bottom of the stern.

3. The seawater tank silt cleaning device according to claim 2, characterized in that: The seabed grid (1) is arranged at the center of the bottom plate.

4. The seawater tank silt cleaning device according to claim 1, characterized in that: The water flushing pipeline and the gas flushing pipeline are inclined downward at an angle of 25-35 degrees.

5. The seawater tank silt cleaning device according to claim 1, characterized in that: The water flushing pipeline and the gas flushing pipeline are welded and fixed to the openings on the side wall of the seawater tank, and are connected to an elbow through a flange. The angle of the elbow is selected to adapt to the direction of the pipeline in the ship.

6. The seawater tank silt cleaning device according to claim 1, characterized in that: The cylindrical inner wall of the seawater tank is not provided with a profile reinforcement structure, and the inner surface of the seawater tank is smooth.

7. The seawater tank silt cleaning device according to claim 1, characterized in that: The water flushing pipeline and the gas flushing pipeline are each provided with two paths. The water pipe of the water flushing pipeline is connected to the fire fighting cabin, and the gas pipe of the gas flushing pipeline is connected to the cabin compression system.

8. The seawater tank silt cleaning device according to any one of claims 1 to 7, characterized in that: It also includes an intelligent cleaning control system, which uses valve remote control and pump start-stop remote control. Through the seawater sand content data of various sea areas in different seasons, it intelligently and autonomously provides ship operators with fully automatic and semi-automatic solutions for system use, assisting and guiding crew members to solve seawater tank cleaning problems.

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