Ship oil tank cooling system

Abstract

The utility model relates to a ship oil tank cooling system. Comprising an oil pump, a plate heat exchanger, a fine filter and a shell-and-tube heat exchanger, an inlet of the oil pump is provided with an oil inlet connector, an outlet of the oil pump is connected to a primary side inlet of the plate heat exchanger through a first electromagnetic valve and an oil conveying pipeline, and an oil inlet of the fine filter is in butt joint with a primary side outlet of the plate heat exchanger; an outlet of the oil pump is connected to an oil inlet of the shell-and-tube heat exchanger through a second electromagnetic valve and an oil conveying pipeline at the same time, and an oil outlet of the fine filter and an oil outlet of the shell-and-tube heat exchanger are connected to an oil return pipeline at the same time. A secondary side inlet of the plate heat exchanger and a medium inlet of the shell-and-tube heat exchanger are simultaneously connected to the cold medium supply pipeline, a secondary side outlet of the plate heat exchanger and a medium outlet of the shell-and-tube heat exchanger are simultaneously connected to the cold medium return pipeline, and the cold medium supply pipeline and the cold medium return pipeline are connected to the cold medium circulation assembly. In the scene that hydraulic oil is rapidly heated due to high-load operation of ship machine equipment, the requirement for timely cooling of the hydraulic oil can still be met, and the ship machine equipment is in a continuous and stable state.

Description

Technical Field

[0001] The utility model belongs to the technical field of ship equipment, and particularly relates to a ship oil tank cooling system. Background Art

[0002] A ship oil tank generally refers to a hydraulic oil tank that meets the operation requirements of a ship. For example, for a cutter suction dredger, the ship oil tank includes a deck machinery oil tank and a cutter system oil tank. The deck machinery oil tank is used to provide hydraulic oil for some hydraulic equipment on the deck, and the cutter system oil tank is used to specifically provide hydraulic oil for the hydraulic components of the cutter system. Regardless of the type of oil tank, during high-load operation, problems such as an increase in the temperature of the hydraulic oil and the mixing of metal debris and dust particles into the hydraulic oil may occur. Excessively high oil temperature will cause the hydraulic oil to be modified, and the mixing of impurities will cause wear problems in the pipelines and components on the hydraulic oil circuit. Therefore, it is necessary to effectively cool and filter the hydraulic oil in the oil tank.

[0003] In the prior art, a plate heat exchanger and a filter are usually used to exert the above-mentioned effects on the hydraulic oil, but there are the following defects: In order to achieve a better heat exchange and cooling effect and at the same time meet the requirements of the filter, the flow rate of the hydraulic oil in the above-mentioned system cannot be too large, and the pressure of the hydraulic oil cannot be too high. Excessive flow rate and too high oil pressure will cause impact on the plate heat exchanger and the filter, potentially resulting in structural damage. However, when the ship machinery is in high-load continuous operation, the temperature of the hydraulic oil will rise rapidly. At this time, the above-mentioned system is difficult to meet the operation requirements of timely cooling due to flow rate and pressure limitation.

[0004] In summary, it is necessary to develop and design a new ship oil tank cooling system to solve the above-mentioned technical problems. Summary of the Utility Model

[0005] The purpose of the utility model is to provide a ship oil tank cooling system, which can provide stable and reliable cooling and filtering effects for the hydraulic oil in the oil tank, and still meet the requirements of timely cooling and temperature reduction of the hydraulic oil in the scenario where the ship machinery is in high-load operation and causes the hydraulic oil to heat up rapidly, so that the ship machinery is in a continuous and stable state.

[0006] The technical solution adopted by the present utility model is as follows: A ship oil tank cooling system includes an oil pump, a plate heat exchanger, a fine efficiency filter, and a shell-and-tube heat exchanger. An oil inlet interface is provided at the inlet of the oil pump. The outlet of the oil pump is connected to the primary side inlet of the plate heat exchanger through a first solenoid valve and an oil pipeline. The oil inlet of the fine efficiency filter is butt-connected to the primary side outlet of the plate heat exchanger. The outlet of the oil pump is also connected to the oil inlet of the shell-and-tube heat exchanger through a second solenoid valve and an oil pipeline. The oil outlet of the fine efficiency filter and the oil outlet of the shell-and-tube heat exchanger are both connected to the oil return pipeline. The secondary side inlet of the plate heat exchanger and the medium inlet of the shell-and-tube heat exchanger are both connected to the cold medium supply pipeline. The secondary side outlet of the plate heat exchanger and the medium outlet of the shell-and-tube heat exchanger are both connected to the cold medium return pipeline. The cold medium supply pipeline and the cold medium return pipeline are connected to the cold medium circulation component.

[0007] Preferably, it further includes two primary efficiency filters arranged in parallel. The first solenoid valve has a single input interface and two output interfaces. The outlet of the oil pump is connected to the input interface of the first solenoid valve through a pipeline. The two output interfaces of the first solenoid valve are connected to the oil inlets of the two primary efficiency filters through connecting pipelines. The oil outlets of the two primary efficiency filters are connected to the oil pipeline through pipelines.

[0008] Preferably, manual valves are installed on the connecting pipeline and the pipeline between the oil outlet of the primary efficiency filter and the oil pipeline.

[0009] Preferably, the cold medium circulation component includes a circulating water pump, a suction pipe, and a drain pipe. The suction pipe and the drain pipe are located inside the ship's sea chest. The circulating water pump extracts low-temperature seawater from around the ship through the suction pipe, and the seawater after heat exchange in the plate heat exchanger and the shell-and-tube heat exchanger is discharged through the drain pipe.

[0010] Preferably, the cold medium circulation component includes a low-temperature water tank, a refrigeration unit, and a circulating water pump. Clean water is used as the cooling medium. The refrigeration unit prepares low-temperature clean water, and the circulating water pump establishes a circulation of the low-temperature clean water between the low-temperature water tank and the plate heat exchanger and the shell-and-tube heat exchanger.

[0011] Preferably, it further includes a chassis, and the oil pump, the plate heat exchanger, the fine efficiency filter, the shell-and-tube heat exchanger, and the two primary efficiency filters are vertically installed on the chassis.

[0012] The advantages and positive effects of the present utility model are:

[0013] The utility model provides a ship oil tank cooling system. By setting a plate heat exchanger and a high-efficiency filter, a cooling and filtering cycle is constructed, realizing the heat exchange cooling and filtering treatment of the hydraulic oil in the oil tank. While reducing the oil temperature, it can remove the particulate impurities contained in the hydraulic oil, providing basic cooling and filtering functions. On the basis of the foregoing circulation path, the utility model additionally provides a heat exchange cooling path parallel to the foregoing circulation path, that is, a shell-and-tube heat exchanger. In this way, in the scenario where the high-load operation of the marine engine equipment causes the rapid temperature rise of the hydraulic oil, an auxiliary cooling effect is provided through the parallel circulation path. Since no filter component is provided in this path, the flow rate and oil pressure of the hydraulic oil in the path can be increased, and the heat exchange cooling efficiency is also significantly improved. Therefore, this oil tank cooling device can still meet the requirement of timely cooling and temperature reduction of the hydraulic oil under special working conditions, keeping the marine engine equipment in a continuous and stable state.

[0014] By setting a first solenoid valve and a second solenoid valve, the foregoing two circulation paths can be controllably conducted and shut off, realizing single-path conduction or double-path conduction to meet the cooling and filtering requirements under different working conditions. Brief Description of the Drawings

[0015] Figure 1 is the front view structural schematic diagram of the utility model;

[0016] Figure 2 is the three-dimensional structural schematic diagram of the main body part of the utility model.

[0017] In the figure:

[0018] 1, chassis; 2, oil inlet interface; 3, oil transmission pipeline; 4, oil outlet pipe; 5, water inlet pipe of the plate heat exchanger; 6, high-efficiency filter; 7, shell-and-tube heat exchanger; 8, water return pipe of the plate heat exchanger; 9, plate heat exchanger; 10, first solenoid valve; 11, oil pump; 12, second solenoid valve; 13, manual valve; 14, primary filter; 15, connecting pipeline. Detailed Embodiment

[0019] In order to further understand the invention content, characteristics and effects of the utility model, the following embodiments are given for detailed description.

[0020] Please refer to Figure 1 and Figure 2 , the ship oil tank cooling system of the utility model includes an oil pump 11, a plate heat exchanger 9, a high-efficiency filter 6 and a shell-and-tube heat exchanger 7. Among them, the oil pump 11 is used to provide the power for the flow of the hydraulic oil. The hydraulic oil is pumped out from the oil outlet of the oil tank and injected into the oil return port after completing the external circulation treatment. The plate heat exchanger 9 and the shell-and-tube heat exchanger 7 are used to provide heat exchange cooling functions, and the high-efficiency filter 6 is used to provide a filtering function for the hydraulic oil, filtering and intercepting the particulate matter contained in the hydraulic oil to improve the oil quality of the hydraulic oil.

[0021] An oil inlet interface 2 is provided at the inlet of the oil pump 11, and the oil inlet interface 2 is connected to the oil outlet of the oil tank through a pipeline.

[0022] The outlet of the oil pump 11 is connected to the primary side inlet of the plate heat exchanger 9 through the first solenoid valve 10 and the oil pipeline 3, and the oil inlet of the fine filter 6 is butt-connected to the primary side outlet of the plate heat exchanger 9. The outlet of the oil pump 11 is also connected to the oil inlet of the shell-and-tube heat exchanger 7 through the second solenoid valve 12 and the oil pipeline 3. The oil outlet of the fine filter 6 and the oil outlet of the shell-and-tube heat exchanger 7 are both connected to the oil return pipeline, and the oil return pipeline is connected to the oil return port of the oil tank.

[0023] In this way, by controlling the first solenoid valve 10 and the second solenoid valve 12, the flow direction of the hydraulic oil to the plate heat exchanger 9 and / or the shell-and-tube heat exchanger 7 can be controlled.

[0024] In this embodiment, two primary filters 14 arranged in parallel are further included. The first solenoid valve 10 has a single input interface and a double output interface. The outlet of the oil pump 11 is connected to the input interface of the first solenoid valve 10 through a pipeline. The two output interfaces of the first solenoid valve 10 are connected to the oil inlets of the two primary filters 14 through the connecting pipelines 15. The oil outlets of the two primary filters 14 are connected to the oil pipeline 3 through pipelines.

[0025] The two primary filters 14 exert a pre-stage primary filtering effect on the hydraulic oil to filter out large-particle impurities contained in the hydraulic oil. Then, the fine filter 6 exerts a post-stage fine filtering effect on the hydraulic oil to further filter out small-particle impurities contained in the hydraulic oil. Both the fine filter 6 and the primary filter 14 provide a filtering function, but only the types are different, and the pore sizes of the internal filter meshes are different.

[0026] In this embodiment, manual valves 13 are installed on the connecting pipeline 15 and on the pipeline between the oil outlet of the primary filter 14 and the oil pipeline 3. In this way, by operating the manual valve 13, one of the primary filters 14 is put into use, and the other primary filter 14 is used as a standby. In addition, when one of the primary filters 14 needs to be internally cleaned, the other primary filter 14 is also connected to be used by operating the manual valve 13, and the primary filter 14 that needs to be cleaned is disassembled and assembled.

[0027] The secondary side inlet of the plate heat exchanger 9 and the medium inlet of the shell-and-tube heat exchanger 7 are both connected to the cold medium supply pipeline. The secondary side outlet of the plate heat exchanger 9 and the medium outlet of the shell-and-tube heat exchanger 7 are both connected to the cold medium return pipeline. The cold medium supply pipeline and the cold medium return pipeline are connected to the cold medium circulation assembly. The cold medium circulation assembly introduces the cold medium into the interiors of the plate heat exchanger 9 and the shell-and-tube heat exchanger 7 to exchange heat with the high-temperature hydraulic oil, so that the hydraulic oil is cooled and the medium is heated.

[0028] According to different cooling media, the cold medium circulation component can be selected from the following two structural forms according to the conditions of the ship itself:

[0029] In the first structural form, low-temperature seawater is used as the cooling medium. At this time, the cold medium circulation component includes a circulation water pump, a suction pipe and a drain pipe. The suction pipe and the drain pipe are located inside the ship's sea chest. The circulation water pump extracts low-temperature seawater from around the ship through the suction pipe, exchanges heat in the plate heat exchanger 9 and the shell-and-tube heat exchanger 7, and then discharges it through the drain pipe;

[0030] In the second structural form, the prepared low-temperature clean water is used as the cooling medium. At this time, the cold medium circulation component includes a low-temperature water tank, a refrigeration unit and a circulation water pump. The refrigeration unit prepares low-temperature clean water, and the circulation water pump establishes a circulation of the low-temperature clean water between the low-temperature water tank and the plate heat exchanger 9 and the shell-and-tube heat exchanger 7.

[0031] In this embodiment, it further includes a chassis 1. The oil pump 11, the plate heat exchanger 9, the fine filter 6, the shell-and-tube heat exchanger 7 and two coarse filters 14 are vertically installed on the chassis 1, which can improve the overall structural compactness of this oil tank cooling device, avoid occupying too much space, and through the setting of the chassis 1, this oil tank cooling device realizes a skid-mounted structure, which is very convenient for transfer and layout.

[0032] Operation mode:

[0033] Connect this oil tank cooling device to the oil outlet and the oil return port on the oil tank through pipelines, start the oil pump 11, and select to build a circulation path according to different working conditions. Generally, close the second solenoid valve 12 and open the first solenoid valve 10. Then, under the pumping action of the oil pump 11, the hydraulic oil sequentially passes through the coarse filter 14, the primary side of the plate heat exchanger 9 and the fine filter 6, and finally returns to the oil tank. At this time, the hydraulic oil in the circulation path flows at a relatively low speed, both for cooling and for front and back two-stage filtering; when it enters the scenario where the high-load operation of the ship's machinery equipment causes the hydraulic oil to rapidly heat up, control the first solenoid valve 10 to close and the second solenoid valve 12 to open, and the oil pump 11 increases its speed. Then the hydraulic oil enters the shell-and-tube heat exchanger 7. In this circulation path, the hydraulic oil flows at a relatively high speed and only conducts heat exchange and cooling to improve the cooling efficiency; of course, it can be imagined that the first solenoid valve 10 and the second solenoid valve 12 can also be opened simultaneously to establish the above two circulation paths at the same time.

Claims

1. A ship oil tank cooling system, characterized in that: It includes an oil pump (11), a plate heat exchanger (9), a fine efficiency filter (6) and a shell-and-tube heat exchanger (7). An oil inlet interface (2) is provided at the inlet of the oil pump (11). The outlet of the oil pump (11) is connected to the primary side inlet of the plate heat exchanger (9) through a first solenoid valve (10) and an oil pipeline (3). The oil inlet of the fine efficiency filter (6) is butt-connected to the primary side outlet of the plate heat exchanger (9). The outlet of the oil pump (11) is also connected to the oil inlet of the shell-and-tube heat exchanger (7) through a second solenoid valve (12) and the oil pipeline (3). The oil outlet of the fine efficiency filter (6) and the oil outlet of the shell-and-tube heat exchanger (7) are both connected to the oil return pipeline. The secondary side inlet of the plate heat exchanger (9) and the medium inlet of the shell-and-tube heat exchanger (7) are both connected to the cold medium supply pipeline. The secondary side outlet of the plate heat exchanger (9) and the medium outlet of the shell-and-tube heat exchanger (7) are both connected to the cold medium return pipeline. The cold medium supply pipeline and the cold medium return pipeline are connected to the cold medium circulation assembly.

2. The ship oil tank cooling system according to claim 1, characterized in that: It also includes two parallelly arranged coarse efficiency filters (14). The first solenoid valve (10) has a single input interface and a double output interface. The outlet of the oil pump (11) is connected to the input interface of the first solenoid valve (10) through a pipeline. The two output interfaces of the first solenoid valve (10) are connected to the oil inlets of the two coarse efficiency filters (14) through a connecting pipeline (15). The oil outlets of the two coarse efficiency filters (14) are connected to the oil pipeline (3) through a pipeline.

3. The ship oil tank cooling system according to claim 2, wherein: Manual valves (13) are installed on the connecting pipeline (15) and on the pipeline between the oil outlet of the coarse efficiency filter (14) and the oil pipeline (3).

4. The ship oil tank cooling system according to claim 3, characterized in that: The cold medium circulation assembly includes a circulation water pump, a suction pipe and a drain pipe. The suction pipe and the drain pipe are located inside the ship's sea chest. The circulation water pump extracts low-temperature seawater from around the ship through the suction pipe, and the seawater after heat exchange in the plate heat exchanger (9) and the shell-and-tube heat exchanger (7) is discharged through the drain pipe.

5. The ship oil tank cooling system according to claim 3, characterized in that: The cold medium circulation assembly includes a low-temperature water tank, a refrigeration unit and a circulation water pump. Clean water is used as the cooling medium. The refrigeration unit prepares low-temperature clean water, and the circulation water pump establishes a circulation of the low-temperature clean water between the low-temperature water tank and the plate heat exchanger (9) and the shell-and-tube heat exchanger (7).

6. The ship oil tank cooling system according to claim 4 or 5, characterized in that: It also includes a chassis (1). The oil pump (11), the plate heat exchanger (9), the fine efficiency filter (6), the shell-and-tube heat exchanger (7) and the two coarse efficiency filters (14) are vertically installed on the chassis (1).

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