Main engine cooling water system of small waterplane ship

Abstract

A main engine cooling water system of a small waterplane ship comprises a main engine, a shafting cooling water pump and a shafting butterfly valve, and further comprises a first electric butterfly valve, a second electric butterfly valve and a water pump, the second electric butterfly valve is arranged on a water pipe, one end of the water pipe is communicated with the water outlet end of the shafting cooling water pump, and the other end of the water pipe is communicated with the water inlet pipe of the main machine cooling water; the stop check valve is arranged at the water inlet end of the main engine cooling water; the liquid level sensor is arranged at a water inlet pipe of the host cooling water; and the comprehensive alarm system is electrically connected with the first electric butterfly valve, the second electric butterfly valve and the liquid level sensor. The water diversion device can help the main engine to rapidly divert water in a main engine cooling water system of a small waterplane ship, and the purpose that the main engine can be rapidly started is achieved.

Description

Technical Field

[0001] The utility model relates to the technical field of ship main engine cooling, in particular to a cooling water system for a main engine of a small waterplane area ship. Background Art

[0002] The ship's main engine cooling system plays an irreplaceable and important role throughout the ship's life cycle.

[0003] Preventing equipment from overheating and damage. Ship main engines generate significant heat during operation. If this heat cannot be dissipated promptly, it can cause equipment to overheat, malfunction, or even damage. Cooling systems use seawater or freshwater to absorb this heat, ensuring equipment operates within the appropriate temperature range, thus preventing overheating and damage. Cooling systems not only prevent equipment from overheating but also ensure proper operation. For example, a ship main engine's cooling system keeps the operating temperature of heated components within the material limits or the system's operational requirements, ensuring sufficient strength even under high temperatures. It also maintains a suitable temperature difference between the internal and external surfaces of heated components, minimizing thermal stress. Improving equipment life and system safety and reliability: Modern ship main engine power units typically utilize a centralized cooling system. This system uses a freshwater-seawater heat exchanger for centralized cooling, preventing direct seawater contact with the main engine and other heat exchanger cooling components. This reduces the risk of seawater corrosion and leakage, significantly extending equipment life and system safety and reliability. Reducing maintenance costs: An effective cooling system ensures the proper operation of a ship's power system, minimizing failures and maintenance requirements due to overheating, thereby reducing maintenance costs. Coping with extreme environments: The efficiency of the cooling system is particularly important when sailing in hot waters. If the seawater temperature is too high, the cooling effect will be reduced, which may lead to frequent engine failures, increased maintenance costs and safety hazards.

[0004] The main engines of existing small waterplane area vessels are typically located relatively high above the hull. Due to their high elevation above the sea surface, the main engine's water pump often experiences difficulty or even complete failure to prime water, preventing the main engine from starting and potentially damaging the pump's impeller. Currently, there is no solution on the market to address this difficulty without affecting the main engine's existing structure.

[0005] It is not difficult to see that there are still many problems in the existing technology, and it is necessary to improve the existing cooling water system of the main engine of the small waterplane area ship to overcome the defects of the existing technology. Utility Model Content

[0006] Therefore, in order to solve the above problems in the prior art, the utility model proposes a cooling water system for a main engine of a small waterplane area ship.

[0007] The utility model solves the above problems through the following technical means:

[0008] A cooling water system for a main engine of a small waterplane area ship, comprising a main engine, a shaft cooling water pump, a shaft butterfly valve, and further comprising:

[0009] a first electric butterfly valve, arranged at the water outlet of the shaft cooling water pump;

[0010] a second electric butterfly valve, the second electric butterfly valve being arranged on a water pipe, one end of the water pipe being connected to the water outlet of the shafting cooling water pump, and the other end of the water pipe being connected to the water inlet pipe of the main engine cooling water;

[0011] A stop check valve is provided at the water inlet of the main engine cooling water;

[0012] A liquid level sensor is provided at the water inlet pipe of the main engine cooling water;

[0013] The integrated alarm system is electrically connected to the first electric butterfly valve, the second electric butterfly valve and the liquid level sensor.

[0014] Furthermore, the first electric butterfly valve and the second electric butterfly valve are interlocked.

[0015] Furthermore, the liquid level sensor communicates with the integrated alarm system via electrical signals.

[0016] Furthermore, one end of the water pipe where the second electric butterfly valve is located is arranged between the water outlet end of the shaft system cooling water pump and the first electric butterfly valve; the other end of the water pipe is arranged between the stop check valve and the liquid level sensor.

[0017] Furthermore, the shaft system butterfly valve is a manual butterfly valve.

[0018] Furthermore, the integrated alarm system controls the opening and closing of the first electric butterfly valve and the second electric butterfly valve according to the electrical signal received from the liquid level sensor.

[0019] Furthermore, the cooling water system of the main engine of the small waterplane area ship also includes an automatic exhaust valve, which is arranged between the liquid level sensor and the main engine and connected to the water inlet pipe of the main engine cooling water.

[0020] The utility model can help the main engine of the small waterplane area ship to dredge water more quickly in the cooling water system of the main engine of the small waterplane area ship through the linkage design of the first electric butterfly valve, the second electric butterfly valve, the liquid level sensor, the integrated alarm system, etc., so as to achieve the purpose of quickly starting the main engine; avoid insufficient water diversion of the main engine, which causes the turbine in the main engine to be heated and deformed for a long time; and make the small waterplane area ship more adaptable to extreme weather conditions at sea. When there are strong winds and waves at sea, the small waterplane area ship will rise and fall, making it more difficult to dredge the main engine. For the small waterplane area ship equipped with the utility model, no matter how high the hull is lifted by the wind and waves, it will not affect the starting of the main engine of the small waterplane area ship. BRIEF DESCRIPTION OF THE DRAWINGS

[0021] In order to more clearly illustrate the technical solutions in the embodiments of the present invention, the following briefly introduces the drawings required for use in the description of the embodiments. Obviously, the drawings described below are only some embodiments of the present invention. For ordinary technicians in this field, other drawings can be obtained based on these drawings without paying any creative work.

[0022] Figure 1 It is a structural schematic diagram of the cooling water system of the main engine of the small waterplane area ship described in the present invention. DETAILED DESCRIPTION

[0023] To make the above-mentioned purposes, features, and advantages of the present invention more clearly understood, the technical solutions of the present invention are described in detail below with reference to the accompanying drawings and specific embodiments. It should be noted that the embodiments described are only some of the embodiments of the present invention, not all of them. All other embodiments derived by persons of ordinary skill in the art based on the embodiments of the present invention without creative effort are also within the scope of protection of the present invention.

[0024] Example

[0025] The utility model is described in more detail below:

[0026] like Figure 1 As shown, a cooling water system for a main engine of a small waterplane area ship includes a main engine, a shaft cooling water pump, a shaft butterfly valve, and further includes:

[0027] The first electric butterfly valve (ie Figure 1 1# electric butterfly valve in the shaft cooling water pump) is set at the outlet of the shaft cooling water pump; it should be noted that the water inlet of the shaft cooling water pump is directly connected to seawater (i.e. Figure 1The shaft cooling water pump is generally a cooling water pump carried by a small waterplane area ship (SWASH), and is generally used to cool other components on the ship that need cooling, not the main engine. The main engine on a ship is generally equipped with a small water pump, but due to the fixed shape of the main engine, the small water pump on the main engine can only be a low-power water pump, which is only suitable for SWASH sailing on a smooth sea surface.

[0028] The second electric butterfly valve (i.e. Figure 1 2# electric butterfly valve in), the second electric butterfly valve is set on a water pipe, one end of the water pipe is connected with the outlet end of the shaft system cooling water pump, and the other end of the water pipe is connected with the inlet pipe of the main engine cooling water; it should be noted that the water pipe is connected with the outlet end water pipe of the shaft system cooling water pump and the inlet pipe of the main engine cooling water. When the second electric butterfly valve is opened, the water in the outlet end water pipe of the shaft system cooling water pump can be injected into the inlet pipe of the main engine cooling water to supplement the liquid level in the inlet pipe of the main engine cooling water, thereby facilitating the water diversion of the water pump contained in the main engine, and thus the main engine can be started quickly.

[0029] The stop check valve is provided at the water inlet of the host cooling water. It should be noted that the function of the stop check valve is to ensure that the liquid level in the host cooling water inlet pipe does not decrease after the host is started.

[0030] The liquid level sensor is arranged at the water inlet pipe of the main engine cooling water. It should be noted that the liquid level sensor is used to detect the liquid level in the water inlet pipe of the main engine cooling water. Because the main engines of small waterplane area ships are all arranged at a relatively high position on the hull, and the distance from the sea level is relatively high, the water pump in the main engine will often be unable to draw water due to insufficient pressure, and then the main engine cannot be started. When the liquid level reaches a certain height through the liquid level sensor, the water pump in the main engine can draw water autonomously, and then the main engine can be safely started. When the liquid level in the water inlet pipe of the main engine cooling water reaches the required height, the liquid level sensor will send a signal to the integrated alarm system, informing the integrated alarm system that it can proceed to the next step.

[0031] The integrated alarm system is electrically connected to the first electric butterfly valve, the second electric butterfly valve, and the liquid level sensor. Preferably, the integrated alarm system controls the opening and closing of the first electric butterfly valve and the second electric butterfly valve according to the electrical signal transmitted by the liquid level sensor. It should be noted that the integrated alarm system is used to control the first electric butterfly valve and the second electric butterfly valve. When the integrated alarm system receives the signal from the liquid level sensor that the liquid level has reached the requirement, the integrated alarm system sends a control command to the first electric butterfly valve and the second electric butterfly valve, instructing the first electric butterfly valve to open and the second electric butterfly valve to close. Then the shafting cooling water pump continues to provide cooling water to other components of the hull.

[0032] Preferably, the first electric butterfly valve and the second electric butterfly valve are interlocked. It should be noted that when the system first starts operating, the first electric butterfly valve is closed and the second electric butterfly valve is open. Seawater can be injected into the main engine cooling water inlet pipe through the shaft cooling water pump. When the liquid level in the main engine cooling water inlet pipe reaches the required height, the integrated alarm system controls the second electric butterfly valve to close and the first electric butterfly valve to open. The interlocking control means that the states of the first electric butterfly valve and the second electric butterfly valve are opposite: when one is closed, the other is open.

[0033] Preferably, the liquid level sensor communicates with the integrated alarm system via electrical signals. It should be noted that there are many ways to achieve this in real life, such as using a single-chip microcomputer, etc. Details will not be given here.

[0034] Preferably, one end of the water pipe containing the second electric butterfly valve is positioned between the outlet of the shaft cooling water pump and the first electric butterfly valve; the other end of the water pipe is positioned between the stop check valve and the liquid level sensor. It should be noted that the present invention employs, including but not limited to, the above-mentioned configurations, as long as the cooling water output from the shaft cooling water pump can be injected into the main engine cooling water inlet pipe.

[0035] As a preference, the shaft butterfly valve is a manual butterfly valve (i.e. Figure 1 Similarly, the shaft system butterfly valve may also be an electric butterfly valve.

[0036] Preferably, the SWA main engine cooling water system further comprises an automatic exhaust valve, which is disposed between the liquid level sensor and the main engine and connected to the main engine cooling water inlet pipe. It should be noted that the purpose of providing the automatic exhaust valve in the present invention is to exhaust gas from the main engine cooling water inlet pipe.

[0037] To make the present invention easier to understand, the following is a brief description of the working process of the present invention:

[0038] First, open the 2# electric butterfly valve (while the 1# electric butterfly valve is closed, the manual butterfly valve is normally open, and the stop check valve is normally open). Next, start the shafting cooling water pump. Seawater enters the main engine cooling water inlet pipe through the 2# electric butterfly valve, discharging air inside the pipe through the automatic exhaust valve. A certain liquid level is established in the main engine cooling water inlet pipe. When the liquid level reaches the position of the liquid level sensor, the liquid level sensor sends a signal to the integrated alarm system. Upon receiving the signal, the integrated alarm system automatically controls the 2# electric butterfly valve to close (while automatically opening the 1# electric butterfly valve). At this point, the main engine cooling water inlet pipe is filled with seawater. The shafting cooling water pump can now be manually shut off, allowing the main engine to start more conveniently.

[0039] The utility model can help the main engine of the small waterplane area ship to dredge water more quickly in the cooling water system of the main engine of the small waterplane area ship through the linkage design of the first electric butterfly valve, the second electric butterfly valve, the liquid level sensor, the integrated alarm system, etc., so as to achieve the purpose of quickly starting the main engine; avoid insufficient water diversion of the main engine, which causes the turbine in the main engine to be heated and deformed for a long time; and make the small waterplane area ship more adaptable to extreme weather conditions at sea. When there are strong winds and waves at sea, the small waterplane area ship will rise and fall, making it more difficult to dredge the main engine. For the small waterplane area ship equipped with the utility model, no matter how high the hull is lifted by the wind and waves, it will not affect the starting of the main engine of the small waterplane area ship.

[0040] When referring to "one embodiment", "another embodiment", "embodiment", "preferred embodiment" and the like in this specification, it means that the specific features, structures or characteristics described in conjunction with the example are included in at least one embodiment generally described in this application. The appearance of the same expression in multiple places in the specification does not necessarily refer to the same embodiment. Further, when a specific feature, structure or characteristic is described in conjunction with any embodiment, it is claimed that the realization of such feature, structure or characteristic in conjunction with other embodiments also falls within the scope of the present invention. Although the present invention is described herein with reference to a number of illustrative examples of the present invention, it should be understood that those skilled in the art can design many other modifications and implementations that fall within the scope and spirit of the principles disclosed in this application. More specifically, in addition to the variations and improvements that can be made to the components and / or layout of the subject combination layout within the scope of the present application, the drawings and claims, other uses will also be obvious to those skilled in the art.

Claims

1. A cooling water system for a main engine of a small waterplane area ship, comprising a main engine, a shaft cooling water pump, and a shaft butterfly valve, characterized in that: Also includes: a first electric butterfly valve, arranged at the water outlet of the shaft system cooling water pump; a second electric butterfly valve, the second electric butterfly valve being arranged on a water pipe, one end of the water pipe being connected to the water outlet of the shafting cooling water pump, and the other end of the water pipe being connected to the water inlet pipe of the main engine cooling water; A stop check valve is provided at the water inlet of the main engine cooling water; A liquid level sensor is provided at the water inlet pipe of the main engine cooling water; The integrated alarm system is electrically connected to the first electric butterfly valve, the second electric butterfly valve and the liquid level sensor.

2. The cooling water system for the main engine of a small waterplane area ship according to claim 1, characterized in that: The first electric butterfly valve and the second electric butterfly valve are interlocked.

3. The cooling water system for the main engine of a small waterplane area ship according to claim 1, characterized in that: The liquid level sensor communicates with the integrated alarm system via electrical signals.

4. The cooling water system for the main engine of a small waterplane area ship according to claim 1, characterized in that: One end of the water pipe where the second electric butterfly valve is located is arranged between the water outlet end of the shaft system cooling water pump and the first electric butterfly valve; the other end of the water pipe is arranged between the stop check valve and the liquid level sensor.

5. The cooling water system for the main engine of a small waterplane area ship according to claim 1, characterized in that: The shaft system butterfly valve is a manual butterfly valve.

6. The cooling water system for the main engine of a small waterplane area ship according to claim 3, characterized in that: The integrated alarm system controls the opening and closing of the first electric butterfly valve and the second electric butterfly valve according to the electrical signal received from the liquid level sensor.

7. The cooling water system for the main engine of a small waterplane area ship according to claim 1, characterized in that: It also includes an automatic exhaust valve, which is arranged between the liquid level sensor and the host and connected to the water inlet pipe of the host cooling water.

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