Tug seawater circulation system
By designing a tug seawater circulation system, the seawater return pipeline is used to make high-temperature seawater flow back to the seawater valve box to melt ice, solving the insufficient cooling and safety hazards caused by ice plugs in the seawater cooling system in winter, and achieving the effect of safe production and reducing maintenance costs.
Patent Information
- Application Number
- CN202422332892.7
- Authority / Receiving Office
- CN · China
- Patent Type
- Utility models(China)
- Current Assignee / Owner
- Filing Date
- 2024-09-25
- Publication Date
- 2025-06-17
- Estimated Expiration
- 2034-09-25
AI Technical Summary
The freezing of seawater in winter causes ice blockage in the seawater cooling system of the port tug diesel engine, causing insufficient cooling and high temperature of the diesel engine, posing safety hazards and affecting production.
A tug seawater circulation system is designed, and the seawater valve box, seawater filter, main unit, lubricating oil cooler and freshwater cooler are successively connected through the water inlet pipeline, and a seawater return pipeline is set up at the high-temperature seawater one-way check valve to allow the cooled high-temperature seawater to flow back to the seawater valve box for melting ice to avoid ice plugging.
It effectively eliminates the insufficient cooling caused by ice plugs in the seawater cooling system in winter and the high temperature hazards of diesel engines, ensures safe production, and solves the problem of setting and maintenance of traditional cooling systems in small spaces by simplifying the system and reducing maintenance costs.
Smart Images
Figure CN222991596U_ABST
Abstract
Description
Technical Field
[0001] The utility model relates to the technical field of ship engine room equipment, in particular to a seawater circulation system for a tugboat. Background Art
[0002] The ports in the Bohai Bay are located in the north of Shandong. In winter, the seawater freezes. The seawater cooling system of the port tugboat diesel engine is a closed cooling system. In winter, when sucking seawater, ice blocks are often sucked in together, forming an ice plug in front of the seawater filter, blocking or reducing the seawater flow, resulting in insufficient cooling and causing the diesel engine to overheat. Once this happens, the ship needs to stop during production to eliminate the ice plug, which poses a great safety hazard and delays the safe production. In response to this situation, the general measures at home and abroad are to set up an internal cooling water circulation tank on the ship for the internal circulation of cooling water. However, this measure is not applicable to tugboats with small volume and small space, and it also brings high costs such as maintenance and anti-corrosion, and is difficult to manage. Therefore, through extensive research and project establishment, our company has decided to innovate and transform the existing seawater cooling system of port tugboat diesel engines. Content of the Utility Model
[0003] The purpose of the utility model is to provide a seawater circulation system for a tugboat to eliminate the hidden danger of insufficient cooling caused by sucking ice blocks in the seawater cooling system in winter, resulting in overheating of the diesel engine; better ensure safety and prevent engine damage accidents due to insufficient cooling, and avoid delaying or affecting production due to emergency repair of ice plug faults.
[0004] To achieve the above purpose, the technical solution adopted by the utility model is: a seawater circulation system for a tugboat, including a sea chest, a seawater filter, a main engine, a lubricating oil cooler and a fresh water cooler connected in sequence through a water inlet pipeline. The sea chest is provided with a seawater inlet, and a high-temperature seawater check valve is arranged at the seawater inlet. The lubricating oil cooler is provided with a seawater input port and a seawater output port. The seawater output port is used for the high-temperature seawater flowing out after cooling the lubricating oil cooler. The fresh water cooler is provided with a seawater inlet and a seawater outlet. The seawater outlet is used for the high-temperature seawater flowing out after cooling the fresh water for cooling the main engine. A seawater return pipeline is connected between the seawater outlet of the fresh water cooler and / or the seawater output port of the lubricating oil cooler and the high-temperature seawater check valve.
[0005] On the basis of the above technical solution, the utility model can be further improved as follows:
[0006] As a further improvement of the above technical solution, a sea chest filter is arranged on the sea chest, and the sea chest filter is used for filtering the seawater flowing out of the sea chest.
[0007] As a further improvement of the above technical solution, the main engine is a diesel engine with a seawater pump. The main engine is provided with a water inlet and a water outlet. The seawater pump is arranged at the water inlet and is used for pumping seawater into the sea chest.
[0008] As a further improvement of the above technical solution, two main engines are provided. A seawater pump is provided on each main engine, and the seawater pumps on each main engine are connected to the seawater filter of the seabed valve box through a water inlet pipeline. The water outlet of each main engine is connected to the lubricating oil cooler through a water inlet pipeline.
[0009] As a further improvement of the above technical solution, the seawater filter is provided with a filter inlet and a filter outlet. The filter inlet of the seawater filter is communicated with the seawater filter of the seabed valve box through a water inlet pipeline, and the filter outlet of the seawater filter is connected to the seawater pump through a water inlet pipeline.
[0010] As a further improvement of the above technical solution, the water inlet pipeline includes a first pipeline, a second pipeline, a third pipeline and a fourth pipeline. The first pipeline is connected between the seawater filter of the seabed valve box and the seawater pump on the main engine, and the seawater filter is installed on the first pipeline; the second pipeline is connected between the water outlet of the main engine and the seawater input port of the lubricating oil cooler, the third pipeline is connected between the seawater output port of the lubricating oil cooler and the seawater inlet of the fresh water cooler, one end of the fourth pipeline is connected to the seawater outlet of the fresh water cooler, and the other end is connected with an overboard valve, and a three-way valve is installed on the fourth pipeline. The seawater return pipeline is connected between the high-temperature seawater check valve and the three-way valve.
[0011] As a further improvement of the above technical solution, the water inlet pipeline includes a first pipeline, a second pipeline, a third pipeline and a fourth pipeline. The first pipeline is connected between the seawater filter of the seabed valve box and the seawater pump on the main engine, and the seawater filter is installed on the first pipeline; the second pipeline is connected between the water outlet of the main engine and the seawater input port of the lubricating oil cooler, the third pipeline is connected between the seawater output port of the lubricating oil cooler and the seawater inlet of the fresh water cooler, one end of the fourth pipeline is connected to the seawater outlet of the fresh water cooler, and the other end is connected with an overboard valve, and a three-way valve is installed on the third pipeline. The seawater return pipeline is connected between the high-temperature seawater check valve and the three-way valve.
[0012] As a further improvement of the above technical solution, the water inlet pipeline includes a first pipeline, a second pipeline, a third pipeline and a fourth pipeline. The first pipeline is connected between the sea chest filter on the sea chest and the seawater pump on the main engine, and the seawater filter is installed on the first pipeline; the second pipeline is connected between the water outlet of the main engine and the seawater inlet of the lubricating oil cooler, the third pipeline is connected between the seawater outlet of the lubricating oil cooler and the seawater inlet of the fresh water cooler, one end of the fourth pipeline is connected to the seawater outlet of the fresh water cooler, and the other end is connected with an overboard valve. Three-way valves are installed on both the third pipeline and the fourth pipeline. One end of the seawater return pipeline is connected to the high-temperature seawater check valve, and the other end of the seawater return pipeline forms two return pipe branches, and the two return pipe branches are correspondingly connected to the three-way valves on the third pipeline and the fourth pipeline.
[0013] The beneficial effects of the present utility model are as follows: The tug seawater circulation system provided by the present utility model uses the cooled high-temperature seawater to flow back to the sea chest for ice melting, thereby ensuring that no ice plug phenomenon will occur, eliminating the potential safety hazards caused by ice plugging in the tug's winter seawater cooling system, and not delaying the safe production; in addition, the above-mentioned tug seawater circulation system is equipped with a seawater return pipeline, which makes it convenient to arrange the seawater return pipeline in the narrow space at the bottom of the tug engine room. The setting is simple, the investment is small, and the maintenance is convenient. It can be directly maintained as an ordinary bilge pipeline, solving the problems of difficult setting, high investment and high cost of maintenance and anti-corrosion in building a cooling water internal circulation cabin in the engine room in the traditional way. Description of the Drawings
[0014] The present utility model will be further described below with reference to the drawings and embodiments.
[0015] Figure 1 is the system schematic diagram of the tug seawater circulation system provided by Embodiment 1 of the present utility model;
[0016] Figure 2 is the system schematic diagram of the tug seawater circulation system provided by Embodiment 2 of the present utility model;
[0017] Figure 3 is the system schematic diagram of the tug seawater circulation system provided by Embodiment 3 of the present utility model;
[0018] In the figure: 1, sea chest; 11, sea chest filter; 12, high-temperature seawater check valve; 2, seawater filter; 3, main engine; 31, seawater pump; 4, fresh water cooler; 41, seawater return pipeline; 5, lubricating oil cooler; 61, first pipeline; 62, second pipeline; 63, third pipeline; 64, fourth pipeline; 65, overboard valve; 66, three-way valve. Detailed Embodiments
[0019] The present utility model will now be described in further detail with reference to the accompanying drawings and embodiments. These drawings are all simplified schematic diagrams, only illustrating the basic structure of the present utility model in a schematic manner, so they only show the components related to the present utility model.
[0020] In the description of the present utility model, it should be understood that the orientation or positional relationship indicated by the terms "center", "longitudinal", "transverse", "upper", "lower", "front", "rear", "left", "right", "vertical", "horizontal", "top", "bottom", "inner", "outer", etc. is based on the orientation or positional relationship shown in the drawings, and is only for the convenience of describing the present utility model and simplifying the description, rather than indicating or implying that the device or element referred to must have a specific orientation, be constructed and operated in a specific orientation, so it cannot be understood as a limitation to the present utility model. In addition, the terms "first", "second", etc. are only used for descriptive purposes and cannot be understood as indicating or implying relative importance or implicitly indicating the quantity of the indicated technical features. Thus, the features defined with "first", "second", etc. may explicitly or implicitly include one or more of such features. In the description of the present utility model, unless otherwise specified, the meaning of "plurality" is two or more.
[0021] In the description of the present utility model, it should be noted that unless otherwise clearly defined and limited, the terms "installation", "connection", "coupling" should be understood in a broad sense. For example, it may be a fixed connection, a detachable connection, or an integral connection; it may be a mechanical connection or an electrical connection; it may be directly connected or indirectly connected through an intermediate medium, and it may be the communication inside two elements. For those of ordinary skill in the art, the specific meanings of the above terms in the present utility model can be understood through specific situations. Embodiment 1
[0022] As Figure 1 shown, Embodiment 1 of the present utility model provides a towing wheel seawater circulation system, which includes a sea chest 1, a seawater filter 2, a main engine 3, a lubricating oil cooler 5, and a fresh water cooler 4 that are successively connected through a water inlet pipeline.
[0023] A sea chest filter 11 and a high-temperature seawater check valve 12 are provided on the sea chest 1. The sea chest 1 is provided with a seawater inlet, and the high-temperature seawater check valve 12 is arranged at the seawater inlet. External seawater enters the sea chest 1 from the seawater inlet, and the sea chest filter 11 is used to filter the seawater flowing out of the sea chest 1.
[0024] The main engine 3 is a diesel engine with a seawater pump 31. The main engine 3 is provided with a water inlet and a water outlet. The seawater pump 31 is arranged at the water inlet for pumping seawater into the sea chest 1. In this embodiment, there are two main engines 3, and each main engine 3 is provided with a seawater pump 31. Moreover, the seawater pumps 31 on each main engine 3 are connected to the sea chest filter 11 on the sea chest 1 through a water inlet pipeline, and the water outlet of each main engine 3 is connected to the lubricating oil cooler 5 through a water inlet pipeline.
[0025] The seawater filter 2 is used to filter marine organisms and other solids in seawater. The seawater filter 2 is provided with a filter inlet and a filter outlet. The filter inlet of the seawater filter 2 is communicated with the sea chest filter 11 through a water inlet pipeline, and the filter outlet of the seawater filter 2 is communicated with the seawater pump 31 through a water inlet pipeline. The seawater pump 31 pumps seawater into the sea chest 1. After the seawater is filtered by the seawater filter 2 to remove solids, it successively passes through the main engine 3, the lubricating oil cooler 5 and the fresh water cooler 4, so as to cool down the main engine 3, the lubricating oil cooler 5 and the fresh water cooler 4 in turn.
[0026] The lubricating oil cooler 5 is arranged in the lubricating oil circulation oil circuit of the main engine 3 for cooling the lubricating oil in the main engine 3 to keep the oil temperature within the normal working range. The lubricating oil cooler 5 is provided with a seawater inlet and a seawater outlet. Seawater is introduced from the seawater inlet to cool the lubricating oil cooler 5, and the seawater temperature rises after cooling the lubricating oil cooler 5 and flows out from the seawater outlet.
[0027] The fresh water cooler 4 uses fresh water to cool the main engine 3. The fresh water cooler 4 is provided with a seawater inlet and a seawater outlet. The seawater outlet is used for the seawater with a rising temperature after cooling the fresh water for main engine cooling to flow out. There is a seawater return pipeline 41 connected between the seawater outlet and the high-temperature seawater check valve 12. Seawater is introduced from the seawater inlet into the fresh water cooler 4 to cool the fresh water for main engine cooling. The seawater temperature rises after cooling the fresh water for main engine cooling and flows out from the seawater outlet. The high-temperature seawater check valve 12 is set to only allow seawater to flow unidirectionally along the seawater return pipeline 41 into the seawater inlet of the sea chest 1, so that the high-temperature seawater returns to the seawater inlet of the sea chest 1 for ice melting.
[0028] Further, the inlet pipeline includes a first pipeline 61, a second pipeline 62, a third pipeline 63 and a fourth pipeline 64. The first pipeline 61 is connected between the sea chest filter 11 on the sea chest 1 and the seawater pump 31 on the main engine 3, and the seawater filter 2 is installed on the first pipeline 61. The second pipeline 62 is connected between the water outlet of the main engine 3 and the seawater inlet of the lubricating oil cooler 5. The third pipeline 63 is connected between the seawater outlet of the lubricating oil cooler 5 and the seawater inlet of the fresh water cooler 4. One end of the fourth pipeline 64 is connected to the seawater outlet of the fresh water cooler 4, and the other end is connected to an overboard valve 65. When the overboard valve 65 is opened, seawater is discharged overboard. A three-way valve 66 is installed on the fourth pipeline 64, and the seawater return pipeline 41 is connected between the high-temperature seawater check valve 12 and the three-way valve 66. Embodiment 2
[0029] As Figure 2 shown, Embodiment 2 of the present utility model provides a tug seawater circulation system. On the basis of the above Embodiment 1, the difference between Embodiment 2 and Embodiment 1 is only that: a seawater return pipeline 41 is connected between the seawater outlet of the lubricating oil cooler 5 and the high-temperature seawater check valve 12; specifically, a three-way valve 66 is installed on the third pipeline 63, and the seawater return pipeline 41 is connected between the high-temperature seawater check valve 12 and the three-way valve 66, so that the high-temperature seawater flowing out from the seawater outlet of the lubricating oil cooler 5 flows back to the seawater inlet of the sea chest 1 along the seawater return pipeline 41 for ice melting. Embodiment 3
[0030] As Figure 3 shown, Embodiment 3 of the present utility model provides a tug seawater circulation system. On the basis of the above Embodiments 1 and 2, the difference between Embodiment 3 and Embodiments 2 and 1 is that: the seawater return pipeline 41 is connected between the seawater outlet of the fresh water cooler 4 and the seawater outlet of the lubricating oil cooler 5 and the high-temperature seawater check valve 12; specifically, three-way valves 66 are installed on both the third pipeline 63 and the fourth pipeline 64. One end of the seawater return pipeline 41 is connected to the high-temperature seawater check valve 12, and the other end of the seawater return pipeline 41 forms two return pipe branches, and the two return pipe branches are correspondingly connected to the three-way valves 66 on the third pipeline 63 and the fourth pipeline 64, so that the high-temperature seawater flowing out from the seawater outlet of the fresh water cooler 4 and the seawater outlet of the lubricating oil cooler 5 flows back to the seawater inlet of the sea chest 1 along the seawater return pipeline 41 for ice melting.
[0031] When the utility model is in use, the offshore valve 65 is closed or the opening degree is reduced, and the high-temperature seawater check valve 12 is opened. The seawater pump 31 arranged on the main engine 3 pumps seawater into the sea bottom valve box 1. External seawater enters the sea bottom valve box 1 from the seawater inlet. The sea bottom valve box filter 11 filters the seawater flowing out of the sea bottom valve box 1. The seawater filter 2 filters marine organisms and other solids in the seawater. After the seawater is filtered by the seawater filter 2 to remove solids, it passes through the main engine 3, the lubricating oil cooler 5 and the fresh water cooler 4 in sequence, so as to cool down the main engine 3, the lubricating oil cooler 5 and the fresh water cooler 4 in sequence; after the seawater cools the lubricating oil cooler 5, the temperature rises and flows out from the seawater outlet. After the seawater cools the cooling fresh water of the main engine, the temperature rises and flows out from the seawater outlet. Then the seawater flows back to the seawater inlet of the sea bottom valve box 1 along the seawater return pipeline 41, and exchanges heat with the low-temperature seawater in the sea bottom valve box 1. The ice in the seawater entering the sea bottom valve box 1 is melted during the process of seawater circulating flow.
[0032] The seawater circulation system of the tugboat provided by the utility model utilizes the cooled high-temperature seawater to flow back to the sea bottom valve box 1 for ice melting, so as to ensure that there will be no ice plug phenomenon, eliminate the potential safety hazard caused by ice plug in the seawater cooling system of the tugboat in winter, and does not delay the safe production; in addition, by installing the seawater return pipeline 41 between the fresh water cooler 4 and / or the lubricating oil cooler 5 and the sea bottom valve box 1 in the above-mentioned seawater circulation system of the tugboat, it is convenient to arrange the seawater return pipeline 41 in the narrow space at the bottom of the tugboat engine room. The setting is simple, the investment is small, and the maintenance is convenient. It can be directly maintained as an ordinary bilge pipeline, solving the problems of difficult setting, high investment and high cost of maintenance and anti-corrosion in building a cooling water internal circulation cabin in the engine room in the traditional way.
[0033] In the above specific implementation manner of the utility model, the descriptions not involved belong to the well-known technologies in the field, and can be implemented with reference to the well-known technologies.
[0034] Based on the ideal embodiments of the utility model as the inspiration, through the above description, relevant personnel can completely make various changes and modifications without departing from the technical idea of this utility model. The technical scope of this utility model is not limited to the content in the specification, and must be determined according to the scope of the claims.
Claims
1. A tugboat seawater circulation system, characterized in that: The invention comprises a seabed valve box, a seawater filter, a main engine, a lubricating oil cooler and a fresh water cooler which are sequentially connected through a water inlet pipeline. The seabed valve box is provided with a seawater inlet, and a high-temperature seawater one-way check valve is provided at the seawater inlet. The lubricating oil cooler is provided with a seawater input port and a seawater output port, and the seawater output port is used for supplying high-temperature seawater after cooling the lubricating oil cooler to flow out. The fresh water cooler is provided with a seawater inlet and a seawater outlet, and the seawater outlet is used for supplying high-temperature seawater after cooling the main engine cooling fresh water to flow out. A seawater reflux pipeline is connected between the seawater outlet of the fresh water cooler and / or the seawater output port of the lubricating oil cooler and the high-temperature seawater one-way check valve.
2. The tugboat seawater circulation system according to claim 1, characterized in that: The seabed valve box is provided with a seabed valve box filter, and the seabed valve box filter is used to filter the seawater flowing out of the seabed valve box.
3. The tugboat seawater circulation system according to claim 2, characterized in that: The main engine is a diesel engine with a seawater pump. A water inlet and a water outlet are arranged on the main engine. The seawater pump is arranged at the water inlet and is used to pump seawater into the seabed valve box.
4. The tugboat seawater circulation system according to claim 2, characterized in that: There are two main engines, each of which is provided with a seawater pump, and the seawater pump on each main engine is connected to the seabed valve box filter on the seabed valve box through a water inlet pipeline, and the water outlet of each main engine is connected to the lubricating oil cooler through a water inlet pipeline.
5. The tugboat seawater circulation system according to claim 4, characterized in that: The seawater filter is provided with a filter inlet and a filter outlet. The filter inlet of the seawater filter is connected with the seabed valve box filter through a water inlet pipeline, and the filter outlet of the seawater filter is connected with the seawater pump through a water inlet pipeline.
6. The tugboat seawater circulation system according to claim 5, characterized in that: The water inlet pipeline includes a first pipeline, a second pipeline, a third pipeline and a fourth pipeline. The first pipeline is connected between the seabed valve box filter on the seabed valve box and the seawater pump on the main engine, and the seawater filter is installed on the first pipeline; the second pipeline is connected between the water outlet of the main engine and the seawater input port of the lubricating oil cooler, the third pipeline is connected between the seawater output port of the lubricating oil cooler and the seawater inlet of the fresh water cooler, one end of the fourth pipeline is connected to the seawater outlet of the fresh water cooler, and the other end is connected to an outboard valve, and a three-way valve is installed on the fourth pipeline, and the seawater return pipeline is connected between the high-temperature seawater one-way check valve and the three-way valve.
7. The tugboat seawater circulation system according to claim 5, characterized in that: The water inlet pipeline includes a first pipeline, a second pipeline, a third pipeline and a fourth pipeline. The first pipeline is connected between the seabed valve box filter on the seabed valve box and the seawater pump on the main engine, and the seawater filter is installed on the first pipeline; the second pipeline is connected between the water outlet of the main engine and the seawater input port of the lubricating oil cooler, the third pipeline is connected between the seawater output port of the lubricating oil cooler and the seawater inlet of the fresh water cooler, one end of the fourth pipeline is connected to the seawater outlet of the fresh water cooler, and the other end is connected to an outboard valve, a three-way valve is installed on the third pipeline, and the seawater return pipeline is connected between the high-temperature seawater one-way check valve and the three-way valve.
8. The tugboat seawater circulation system according to claim 5, characterized in that: The water inlet pipeline includes a first pipeline, a second pipeline, a third pipeline and a fourth pipeline. The first pipeline is connected between the seabed valve box filter on the seabed valve box and the seawater pump on the main engine, and the seawater filter is installed on the first pipeline; the second pipeline is connected between the water outlet of the main engine and the seawater input port of the lubricating oil cooler, the third pipeline is connected between the seawater output port of the lubricating oil cooler and the seawater inlet of the fresh water cooler, one end of the fourth pipeline is connected to the seawater outlet of the fresh water cooler, and the other end is connected to an outboard valve. Three-way valves are installed on the third pipeline and the fourth pipeline. One end of the seawater return pipeline is connected to the high-temperature seawater one-way check valve, and the other end of the seawater return pipeline forms two return pipe branches, and the two return pipe branches are correspondingly connected to the three-way valves on the third pipeline and the fourth pipeline.