A double-cycle water cooling device for a ship propulsion motor

Abstract

The utility model discloses a kind of double-cycle water cooling devices for ship propulsion motor, a kind of double-cycle water cooling devices for ship propulsion motor, including double-cycle cooling assembly, the double-cycle cooling assembly including outer water inlet valve, heat exchanger, circulating water pump, expansion water tank and cooling liquid inlet valve, water inlet, water outlet, cooling liquid inlet and cooling liquid outlet are set on heat exchanger, after forming outer circulation channel between water inlet and water outlet on heat exchanger with the series connection of outer water inlet valve, after forming internal circulation cooling loop between cooling liquid inlet and cooling liquid outlet on heat exchanger with the series connection of circulating water pump, expansion water tank, cooling liquid inlet valve and ship propulsion motor, it is characterized by: in double-cycle cooling assembly is installed in a box, it has certain protection level, can reduce the damage caused by the adverse environment of engine room to internal equipment, device, and integrated degree is high, modularization, save installation space.

Description

Technical Field

[0001] This utility model relates to a dual-circulation water-cooling device for ship propulsion motors. Background Technology

[0002] Existing dual-cycle water-cooling devices for marine propulsion motors have been developed, as evidenced by patent number CN218751345U, entitled "A Utility Model Patent for a Dual-Cycle Cooling System for Marine Motors." This system includes a first circulating cooling loop formed by pipe connections between a heat exchanger, the propulsion motor, and the motor controller. A second circulating cooling branch is also included. A seawater pump pumps seawater into the heat exchanger, where it exchanges heat with the first circulating cooling loop. This patent uses the introduced seawater as a separate branch, discharging it directly into the sea after heat exchange. The seawater does not participate in the motor and controller's cooling loops, eliminating the need for motor fans or other cooling equipment. The equipment requirements are low, and installation is simple and convenient. The patent also incorporates an expansion tank to accommodate the system's water expansion, reducing pressure fluctuations caused by water expansion. When the system leaks or cools down for any reason, the expansion tank level drops, replenishing the system with cooling medium and stabilizing the system pressure.

[0003] The above-mentioned background technology has the following drawbacks: 1. It lacks necessary detection sensors, such as coolant flow sensors and pressure sensors, which prevents real-time monitoring of the cooling system's operating status. It also fails to issue timely alarms in case of coolant pump failure or pipe blockage, thus compromising system safety performance. 2. The components are installed independently, resulting in low integration and increasing installation difficulty and space requirements within the ship's cabin. Summary of the Invention

[0004] The purpose of this invention is to provide a dual-circulation water-cooling device for marine propulsion motors, which solves the technical problems of existing dual-circulation water-cooling devices for marine propulsion motors lacking external protective measures, having low integration, and being easily damaged in harsh environments.

[0005] A further objective of this invention is to provide a dual-circulation water-cooling device for ship propulsion motors, thereby addressing the technical problem that existing dual-circulation water-cooling devices for ship propulsion motors lack necessary detection and remote control methods and have incomplete functions.

[0006] The technical solution of this utility model is implemented as follows:

[0007] A dual-circulation water-cooling device for a marine propulsion motor includes a dual-circulation cooling assembly. The dual-circulation cooling assembly includes an external water inlet valve, a heat exchanger, a circulating water pump, an expansion tank, and a coolant inlet valve. The heat exchanger is provided with an inlet, an outlet, a coolant inlet, and a coolant outlet. The external water inlet valve is connected in series with the outlet on the heat exchanger to form an external circulation channel. The circulating water pump, the expansion tank, the coolant inlet valve, and the marine propulsion motor are connected in series between the coolant inlet and the coolant outlet on the heat exchanger to form an internal circulation cooling loop. The characteristic feature is that the dual-circulation cooling assembly is installed inside a single housing.

[0008] Preferably, the external water inlet valve is connected to the inlet of the heat exchanger via a pipeline, and the external water inlet valve and the outlet extend outside the housing; the first coolant interface and the second coolant interface extend outside the housing, and the first coolant interface and the second coolant interface are used to connect the ship's propulsion motor.

[0009] Preferably, the coolant outlet of the heat exchanger is connected to the circulating water pump, the expansion tank and the first coolant interface via a pipeline, and the second coolant interface is connected to the coolant inlet valve and the coolant inlet of the heat exchanger via a pipeline.

[0010] Preferably, an inlet pressure switch is installed between the external water inlet valve and the inlet of the heat exchanger to detect the water pressure signal.

[0011] Preferably, a flow switch and a temperature sensor are installed inside the housing and on the internal circulation cooling circuit to detect the flow rate and temperature signal of the coolant, respectively.

[0012] Preferably, a level sensor is installed inside the expansion tank to detect the coolant level signal.

[0013] Preferably, an electrical mounting plate is also installed inside the housing. The inlet pressure switch, flow switch, temperature sensor and liquid level sensor are electrically connected to the electrical mounting plate. The electrical mounting plate is equipped with relays and several terminal blocks for electrical connection to the host controller.

[0014] Preferably, the front of the enclosure is provided with a door, one side of the enclosure is provided with an external water inlet valve, a water outlet, a first coolant interface and a second coolant interface, and the other side of the enclosure is a movable cover plate, which is fixed with screws and can be removed.

[0015] Preferably, the door is equipped with a coolant temperature gauge, a power indicator light, a running indicator light, and an alarm indicator light, all of which are electrically connected to an electrical mounting plate.

[0016] Preferably, the heat exchanger is a shell-and-tube heat exchanger, the cooling medium of the external circulation channel is river water or seawater, and the cooling medium of the internal circulation cooling circuit is ethylene glycol coolant.

[0017] The beneficial effects of this utility model's technical solution are:

[0018] Effect 1: The dual-circulation cooling assembly is placed inside the enclosure and has a certain level of protection, which can reduce the damage to internal equipment and components caused by the adverse environment of the cabin. It is also highly integrated, modular, and saves installation space.

[0019] Effect 2: The cooling medium of the external circulation channel is river water or seawater. The shell-side heat exchanger with a large external circulation flow rate has a large flow area, which can maintain a high flow rate and improve heat exchange efficiency. Moreover, the daily maintenance of the shell-side heat exchanger with a large flow rate, such as cleaning and descaling, is simple.

[0020] Effect 3: The dual-circulation cooling assembly contains several sensors, including an inlet water pressure switch, a flow switch, a temperature sensor, and a liquid level sensor. These sensors are connected to an electrical mounting plate via cables, and then to an upstream controller. This allows the cooling device to receive remote control commands from the upstream controller, providing remote and intelligent control functions. When the cooling water pump malfunctions or the filter becomes clogged, and the water pressure drops below the set value, the pressure switch will detect and alarm. When the circulating water pump malfunctions or the coolant pipeline is clogged, the coolant flow switch will detect and alarm. When the coolant leaks below the minimum liquid level, the liquid level switch will detect and alarm. When the coolant outlet temperature is high, the upstream controller can issue a command to reduce the output power of the propulsion motor, etc. In all these situations, the upstream controller can receive remote signals from the water cooling device and provide corresponding alarm reminders and processing, protecting the safe operation of the equipment.

[0021] Other advantages of this invention are described in detail in the embodiments section of the specification. Attached Figure Description

[0022] Figure 1 A perspective view provided for this utility model;

[0023] Figure 2 Exploded view provided for this utility model;

[0024] Figure 3 The structural principle diagram provided for this utility model;

[0025] Figure 4 This is a schematic diagram of the electrical installation provided for this utility model.

[0026] In the diagram: 1. Heat exchanger; 2. Expansion tank; 3. Circulating water pump; 4. External water inlet valve; 5a. Coolant inlet; 5b. Coolant outlet; 6a. Water inlet; 6b. Water outlet; 7a. First coolant interface; 7b. Second coolant interface; 8. Pressure switch; 9. Flow switch; 10. Temperature sensor; 11. Liquid level switch; 12. Coolant inlet valve; 13. Electrical mounting plate; 14. Marine propulsion motor; 15. Coolant temperature gauge; 16. Power indicator light; 17. Operation indicator light; 18. Alarm indicator light; 100. Housing; 101. Door; 102. Movable cover; 200. Dual-circulation cooling assembly. Detailed Implementation

[0027] To make the objectives, technical solutions, and advantages of the embodiments of this utility model clearer, the technical solutions of the embodiments of this utility model will be clearly and completely described below with reference to the accompanying drawings. Obviously, the described embodiments are only some embodiments of this utility model, not all embodiments. Based on the embodiments of this utility model, all other embodiments obtained by those skilled in the art without creative effort are within the protection scope of this utility model.

[0028] Example 1:

[0029] like Figures 1 to 4 As shown, this embodiment provides a dual-circulation water-cooling device for a ship propulsion motor, including a dual-circulation cooling assembly 200. The dual-circulation cooling assembly 200 includes an external water inlet valve 4, a heat exchanger 1, a circulating water pump 3, an expansion tank 2, and a coolant inlet valve 12. The heat exchanger 1 is provided with an inlet 6a, an outlet 6b, a coolant inlet 5a, and a coolant outlet 5b. The external water inlet valve 4 is connected in series with the outlet 6b on the heat exchanger 1 to form an external circulation channel. The circulating water pump 3, the expansion tank 2, the coolant inlet valve 12, and the ship propulsion motor 14 are connected in series between the coolant inlet 5a and the coolant outlet 5b on the heat exchanger 1 to form an internal circulation cooling loop. The key feature is that the dual-circulation cooling assembly 200 is installed inside a housing 100. The dual-circulation cooling assembly of this invention, placed inside the housing, has a certain level of protection, which can reduce the damage caused to internal equipment and components by the adverse environment of the engine room. The cooling medium of the external circulation channel is river water or seawater. The shell-side heat exchanger with a large external circulation flow rate has a large flow area, which can maintain a high flow rate and improve heat exchange efficiency. In addition, the daily maintenance of the shell-side heat exchanger with a large flow rate, such as cleaning and descaling, is simple, and it is modular and saves space.

[0030] Preferably, the coolant outlet 5b of the heat exchanger 1 is connected to the circulating water pump 3, the expansion tank 2, and the first coolant interface 7a via a pipe. The second coolant interface 7b is connected to the coolant inlet valve 12 and the coolant inlet 5a of the heat exchanger 1 via a pipe. The external water inlet valve 4 is connected to the inlet 6a on the heat exchanger 1 via a pipe. The external water inlet valve 4 and the outlet extend outside the housing 100. The first coolant interface 7a and the second coolant interface 7b extend outside the housing 100 and are used to connect the ship propulsion motor 14. The structure is simple, the layout is reasonable, and the installation is convenient.

[0031] An inlet pressure switch 8 is installed between the external water inlet valve 4 and the water inlet 6a of the heat exchanger 1 to detect the water pressure signal, which is a complete function.

[0032] The aforementioned flow switch 9 and temperature sensor 10 are installed inside the housing 100 and on the internal circulation cooling circuit to detect the flow signal and temperature signal of the coolant, respectively, providing complete functionality.

[0033] The liquid level sensor 11 installed in the expansion tank 2 is used to detect the coolant level signal, and the function is complete.

[0034] The aforementioned enclosure 100 also houses an electrical mounting plate 13. The inlet pressure switch 8, flow switch 9, temperature sensor 10, and level sensor 11 are electrically connected to the electrical mounting plate 13. The electrical mounting plate 13 is equipped with relays and several terminal blocks for electrical connection to the host controller.

[0035] The dual-circulation cooling system contains several sensors, including an inlet water pressure switch, a flow switch, a temperature sensor, and a liquid level sensor. These sensors are connected to an electrical mounting plate via cables, and then to an upstream controller. This allows the cooling device to receive remote control commands from the upstream controller, providing remote and intelligent control capabilities. When the cooling water pump malfunctions or the filter becomes clogged, and the water pressure drops below the set value, the pressure switch will detect and alarm. When the circulating water pump malfunctions or the coolant pipeline is clogged, the coolant flow switch will detect and alarm. When the coolant leaks below the minimum liquid level, the liquid level switch will detect and alarm. When the coolant outlet temperature is too high, the upstream controller can issue a command to reduce the output power of the propulsion motor, etc. In all these situations, the upstream controller can receive remote signals from the water cooling device and provide corresponding alarm reminders and actions, protecting the safe operation of the equipment.

[0036] The aforementioned enclosure 100 has a door 101 on the front. On one side of the enclosure 100, there is an external water inlet valve 4, a water outlet 6b, a first coolant interface 7a, and a second coolant interface 7b. On the other side of the enclosure 100, there is a movable cover 102. The movable cover 102 is fixed with screws and can be removed. The layout is reasonable and the installation is convenient.

[0037] The aforementioned door 101 is equipped with a coolant temperature gauge 15, a power indicator light 16, a running indicator light 17, and an alarm indicator light 18. The coolant temperature gauge 15, power indicator light 16, running indicator light 17, and alarm indicator light 18 are all electrically connected to the electrical mounting plate 13. The layout is reasonable, the display is intuitive, and it is easy to use.

[0038] The heat exchanger 1 mentioned above is a shell-and-tube heat exchanger. The cooling medium in the external circulation channel is river water or seawater, and the cooling medium in the internal circulation cooling loop is ethylene glycol coolant. It has a simple structure and low daily operating costs.

[0039] The working principle of this utility model is as follows: During external circulation, an external water pump pumps in external water, which passes through the external water inlet valve 4 and pipeline, and then enters the heat exchanger 1 after being detected by the inlet pressure switch 8. After heat exchange, the external water flows out from the outlet 6b, forming the first circulation cooling loop. During internal circulation, the coolant comes out from the cooling outlet of the ship propulsion motor 14, passes through the coolant inlet valve 12 and pipeline into the heat exchanger for cooling, and then is pumped into the expansion tank 2 by the circulating water pump 3. After the expansion tank 2 buffers the pressure, and after being detected by the flow switch 9 and temperature sensor 10, it enters the coolant inlet of the ship propulsion motor 14, forming the second circulation cooling loop. When the cooling device is connected to DC power, the power indicator light 16 illuminates; when the cooling device is running, the operation indicator light 17 illuminates; when the external water pressure of the cooling device is low, the coolant outlet temperature is high, the coolant flow rate is low, or the coolant level is low, the fault indicator light 18 illuminates. The above equipment operating status and alarms can be remotely transmitted to the upper-level controller.

[0040] The above embodiments are preferred embodiments of the present utility model, but the embodiments of the present utility model are not limited thereto. Any changes, modifications, substitutions, combinations, or simplifications made without departing from the spirit and principle of the present utility model are equivalent substitutions and are included within the protection scope of the present utility model.

Claims

1. A dual-circulation water-cooling device for a ship propulsion motor, comprising a dual-circulation cooling assembly (200), wherein the dual-circulation cooling assembly (200) includes an external water inlet valve (4), a heat exchanger (1), a circulating water pump (3), an expansion tank (2), and a coolant inlet valve (12). The heat exchanger (1) is provided with an inlet (6a), an outlet (6b), a coolant inlet (5a), and a coolant outlet (5b). The external water inlet valve (4) is connected in series with the outlet (6b) on the heat exchanger (1) to form an external circulation channel. The circulating water pump (3), the expansion tank (2), the coolant inlet valve (12), and the ship propulsion motor (14) are connected in series between the coolant inlet (5a) and the coolant outlet (5b) on the heat exchanger (1) to form an internal circulation cooling loop, characterized in that: The dual-circulation cooling assembly (200) is installed inside a housing (100).

2. The dual-circulation water-cooling device for a ship propulsion motor according to claim 1, characterized in that: The coolant outlet (5b) of the heat exchanger (1) is connected to the circulating water pump (3), the expansion tank (2) and the first coolant interface (7a) through a pipe. The second coolant interface (7b) is connected to the coolant inlet valve (12) and the coolant inlet (5a) of the heat exchanger (1) in sequence through a pipe.

3. A dual-circulation water-cooling device for a ship propulsion motor according to claim 2, characterized in that: The external water inlet valve (4) is connected to the heat exchanger (1) via a pipe and has an inlet (6a). The external water inlet valve (4) and the outlet extend outside the housing (100). The first coolant interface (7a) and the second coolant interface (7b) extend outside the housing (100). The first coolant interface (7a) and the second coolant interface (7b) are used to connect the ship propulsion motor (14).

4. A dual-circulation water-cooling device for a marine propulsion motor according to claim 1, 2, or 3, characterized in that: An inlet pressure switch (8) is installed between the external water inlet valve (4) and the inlet (6a) of the heat exchanger (1) to detect the water pressure signal.

5. A dual-circulation water-cooling device for a ship propulsion motor according to claim 4, characterized in that: A flow switch (9) and a temperature sensor (10) are installed inside the housing (100) and on the internal circulation cooling circuit to detect the flow signal and temperature signal of the coolant, respectively.

6. A dual-circulation water-cooling device for a ship propulsion motor according to claim 5, characterized in that: A liquid level sensor (11) is installed inside the expansion tank (2) to detect the water level signal of the coolant.

7. A dual-circulation water-cooling device for a marine propulsion motor according to claim 6, characterized in that: An electrical mounting plate (13) is also installed inside the housing (100). The inlet pressure switch (8), flow switch (9), temperature sensor (10) and liquid level sensor (11) are electrically connected to the electrical mounting plate (13). The electrical mounting plate (13) is equipped with relays and several terminal blocks for electrical connection to the host controller.

8. A dual-circulation water-cooling device for a marine propulsion motor according to claim 7, characterized in that: The front of the enclosure (100) is provided with a door (101). On one side of the enclosure (100) are an external water inlet valve (4), a water outlet (6b), a first coolant interface (7a), and a second coolant interface (7b). On the other side of the enclosure (100) is a movable cover plate (102), which is fixed with screws and can be removed.

9. A dual-circulation water-cooling device for a marine propulsion motor according to claim 8, characterized in that: The door (101) is equipped with a coolant temperature gauge (15), a power indicator (16), a running indicator (17) and an alarm indicator (18). The coolant temperature gauge (15), the power indicator (16), the running indicator (17) and the alarm indicator (18) are all electrically connected to the electrical mounting plate (13).

10. A dual-circulation water-cooling device for a marine propulsion motor according to claim 9, characterized in that: The heat exchanger (1) is a shell-and-tube heat exchanger. The cooling medium in the external circulation channel is river water or seawater, and the cooling medium in the internal circulation cooling circuit is ethylene glycol coolant.

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