Cooling and water replenishing system for main engine 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 device can help a main engine to rapidly guide 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

[0001] The invention relates to the technical field of ship main engine cooling, and in particular to a cooling water system for a main engine of a small waterline surface ship. Background Art

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

[0003] Prevent equipment from overheating and damage. The main engine of a ship will generate a lot of heat during operation. If this heat cannot be dissipated in time, it will cause the equipment temperature to be too high, unable to operate normally, or even damage the equipment. The cooling system uses seawater or fresh water to absorb this heat, ensuring that the equipment operates within the appropriate temperature range, thereby preventing the equipment from overheating and damage. The cooling system not only prevents the equipment from overheating, but also ensures the normal operation of the equipment. For example, the cooling system of the main engine of a ship can keep the operating temperature of the heated parts within the limit allowed by the material or the operating requirements of the equipment system, ensuring that the heated parts have sufficient strength under high temperature conditions; at the same time, it ensures the appropriate temperature difference between the inner and outer walls of the heated parts to reduce the thermal stress of the heated parts. Improve equipment life and system safety and reliability: The cooling of the main engine power unit of modern ships usually adopts a central cooling system. This system uses a freshwater-seawater heat exchanger for centralized cooling, avoiding direct contact of seawater with the main engine and other heat exchanger cooling parts, thereby reducing the risk of seawater corrosion and leakage, and greatly improving the life of the equipment and the safety and reliability of the system. Reduce maintenance costs: An effective cooling system can ensure the normal operation of the ship's power system, reduce failures and maintenance requirements caused by overheating, and thus reduce maintenance costs. Coping with extreme environments: When sailing in hot waters, the efficiency of the cooling system is particularly important. 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] For existing small waterplane surface ships, the main engines are all installed at a relatively high position of the hull. Due to the large height from the sea surface, the engine-driven water pump in the main engine often has difficulty in priming water or even fails to priming water, so that the main engine cannot be started, and even the engine-driven pump impeller is damaged. There is currently no solution on the market to solve the difficulty of main engine priming water without affecting the original structure of the main engine.

[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 surface ship to overcome the defects of the existing technology. Summary of the invention

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

[0007] The present invention solves the above problems by the following technical means:

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

[0009] A first electric butterfly valve is arranged at the water outlet of the shaft system cooling water pump;

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

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

[0012] A liquid level sensor is arranged 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, interlocking control is adopted between the first electric butterfly valve and the second electric butterfly valve.

[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 transmitted by the liquid level sensor.

[0019] Furthermore, the main engine cooling water system of the small waterplane surface 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 present invention can help the main engine of the small waterplane surface ship to draw water more quickly in the main engine cooling water system 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 deformed by heat for a long time; and allow the small waterplane surface ship to be more adaptable to extreme weather conditions at sea. When there are strong winds and waves at sea, the small waterplane surface ship will rise and fall, making it more difficult to draw water from its main engine. For the small waterplane surface ship equipped with the present invention, 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 surface 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 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] In order to make the above-mentioned purposes, features and advantages of the present invention more obvious and easy to understand, the technical solution of the present invention will be described in detail below with reference to the accompanying drawings and specific embodiments. It should be pointed out that the described implementation examples are only part of the embodiments of the present invention, not all of the embodiments. Based on the embodiments of the present invention, all other embodiments obtained by ordinary technicians in this field without creative work are within the scope of protection of the present invention.

[0024] Example

[0025] The present invention 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 also includes:

[0027] The first electric butterfly valve (i.e. Figure 1 1# electric butterfly valve in the shaft cooling water pump) is arranged 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 1 The shaft cooling water pump is generally a cooling water pump provided by a small waterplane surface ship, and is generally used to cool other components on the ship that need to be cooled, but does not include cooling of the main engine; the main engine on the ship generally has 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 small waterplane surface ships sailing on a stable sea level.

[0028] The second electric butterfly valve (i.e. Figure 12# electric butterfly valve in the middle), 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 then the main engine can be started quickly.

[0029] The stop check valve is arranged at the water inlet end 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 waterline area ships are arranged at a relatively high position of the hull, and the distance between them and 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. The liquid level sensor senses that the liquid level has reached a certain height, and 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, commanding the first electric butterfly valve to open and the second electric butterfly valve to close. Then the shaft cooling water pump continues to provide cooling water to other parts 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 starts working, the first electric butterfly valve is in a closed state, and the second point butterfly valve is in an open state. Seawater can be injected into the water inlet pipe of the main engine cooling water through the action of the shaft cooling water pump; when the liquid level in the water inlet pipe of the main engine cooling water reaches the required height, the integrated alarm system will control the second electric butterfly valve to close, and the first electric butterfly valve to open. The interlock control means that the states of the first electric butterfly valve and the second electric butterfly valve are opposite, one of them is in a closed state, and the other is in an open state.

[0033] Preferably, the liquid level sensor communicates with the integrated alarm system through electrical signals. It should be noted that there are many ways to achieve communication between the two through electrical signals in real life, such as using a single chip microcomputer, etc. No further details will be given here.

[0034] Preferably, one end of the water pipe where the second electric butterfly valve is located is arranged between the water outlet of the shaft 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. It should be noted that the present invention adopts including but not limited to the above-mentioned arrangement, and it only needs to be able to inject the cooling water output by the shaft cooling water pump into the water inlet pipe of the main engine cooling water.

[0035] Preferably, the shaft system 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 main engine cooling water system of the small waterplane surface ship further comprises 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. It should be noted that the purpose of arranging the automatic exhaust valve in the present invention is to exhaust the gas in the water inlet pipe of the main engine cooling water.

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

[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); then start the shaft system cooling water pump, and the seawater enters the main engine cooling water inlet pipe through the 2# electric butterfly valve to discharge the air in the pipe through the automatic exhaust valve, and establish a certain liquid level 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. After receiving the signal, the integrated alarm system automatically controls the 2# electric butterfly valve to be closed (while automatically opening the 1# electric butterfly valve). At this time, the main engine cooling water inlet pipe is full of seawater, and the shaft system cooling water pump can be manually closed at this time, and the main engine can be started more conveniently.

[0039] The present invention can help the main engine of the small waterplane surface ship to draw water more quickly in the main engine cooling water system 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 deformed by heat for a long time; and allow the small waterplane surface ship to be more adaptable to extreme weather conditions at sea. When there are strong winds and waves at sea, the small waterplane surface ship will rise and fall, making it more difficult to draw water from its main engine. For the small waterplane surface ship equipped with the present invention, 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 surface ship.

[0040] References to "one embodiment", "another embodiment", "embodiment", "preferred embodiment", etc. in this specification refer to specific features, structures or characteristics described in conjunction with the example 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 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, within the scope of the present application disclosure, drawings and claims, in addition to the deformation and improvement that can be made to the components and / or layout of the subject combination layout, 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 surface 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 is arranged at the water outlet of the shaft system cooling water pump; A second electric butterfly valve, wherein the second electric butterfly valve is arranged on a water pipe, one end of the water pipe is connected to the water outlet of the shaft system cooling water pump, and the other end of the water pipe is connected to the water inlet pipe of the main engine cooling water; A stop check valve is arranged at the water inlet of the main engine cooling water; A liquid level sensor is arranged 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 main engine of small waterplane area ship according to claim 1 is characterized in that: The first electric butterfly valve and the second electric butterfly valve are interlocked.

3. The cooling water system for main engine of small waterplane area ship according to claim 1 is characterized by: The liquid level sensor communicates with the comprehensive alarm system via electrical signals.

4. The cooling water system for main engine of small waterplane area ship according to claim 1 is characterized by: 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 main engine of 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 main engine of small waterplane surface ship according to claim 3 is characterized by: 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.

7. The cooling water system for main engine of 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 main machine and connected to the water inlet pipe of the main machine cooling water.

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