A methanol dual fuel engine for a ship

Abstract

The utility model relates to related field of engine especially relates to a methanol dual fuel engine for ship, including base, engine body, fuel input pipe, methanol input pipe, sleeve pipe, sleeve ring, hollow chamber, air inlet pipe, exhaust port, detection sensor, the utility model discloses whether the methanol leaks through detection sensor detection methanol, according to the detection result can find the leak position quickly, accurately, improve the maintenance efficiency, and set up the sleeve ring will leak the methanol and block in the corresponding hollow chamber, reduce the methanol diffusion of leaking, bring the convenience for subsequent cleaning work, and through the hollow chamber between sleeve pipe and methanol input pipe in the recent pipe injects inert gas, when having methanol vapor to enter the hollow chamber, also cannot mix with oxygen and form combustible environment, reduced the possibility of explosion and fire, reduced the security risk that methanol leaked brought, improved the practicability of methanol dual fuel engine.

Description

Technical Field

[0001] This utility model relates to the field of engine-related technologies, and in particular to a methanol dual-fuel engine for ships. Background Technology

[0002] A methanol dual-fuel engine for ships is a marine propulsion system that can simultaneously use methanol and conventional fuel oil (such as diesel) as fuel. It is a crucial technological tool for promoting the green and low-carbon transformation of the shipping industry, offering advantages such as superior environmental performance, high fuel flexibility, and high energy efficiency. Currently, methanol fuel in dual-fuel engines is typically delivered via dedicated methanol pipelines. However, these pipelines may leak over time due to aging or damage. The long pipelines make it difficult to detect leaks promptly, and leaked methanol can easily spread, complicating cleanup efforts. Furthermore, methanol is toxic and flammable; failure to promptly repair leaks can create safety hazards, reducing the practicality of methanol dual-fuel engines. Summary of the Invention

[0003] Therefore, in order to overcome the above-mentioned shortcomings, this utility model provides a methanol dual-fuel engine for ships to solve the above-mentioned technical problems.

[0004] To achieve the above objectives, this utility model adopts the following technical solution: a methanol dual-fuel engine for ships, comprising a base, an engine body, a fuel input pipe, a methanol input pipe, a sleeve, a collar, a hollow cavity, an intake pipe, an exhaust port, and a detection sensor; the engine body is mounted on the top surface of the base, and the fuel input end and methanol input end of the engine body are respectively connected to the fuel input pipe and the methanol input pipe, which are used to transport fuel oil and methanol fuel respectively; a sleeve is fixedly sleeved on the methanol input pipe, and two or more collars are provided between the outer surface of the methanol input pipe and the inner ring of the sleeve, with a gap between adjacent collars to form a hollow cavity, and a detection sensor is installed in the hollow cavity to detect the methanol content in the hollow cavity; An inlet pipe for conveying inert gas is fixedly passed through the collar. The inlet pipe has two or more exhaust ports that correspond one-to-one with the hollow cavity. The exhaust ports are used to fill the hollow cavity with inert gas.

[0005] Preferably, the bottom of the sleeve has two or more recovery tubes that correspond one-to-one with the hollow cavity, and a one-way solenoid valve is installed on the recovery tube.

[0006] Preferably, both the sleeve and the collar are made of stainless steel.

[0007] Preferably, the end of the intake pipe near the engine body is a sealed structure.

[0008] Preferably, a connector is provided at the end of the intake pipe away from the engine body, and the inner diameter of the connector is larger than the inner diameter of the intake pipe.

[0009] Preferably, the detection sensor is a methanol concentration sensor.

[0010] Preferably, a pressure sensor is installed on the top inner side of the hollow cavity.

[0011] The beneficial effects of this utility model are: This invention features a detection sensor installed in each hollow cavity. When methanol leaks, the corresponding sensor can detect it promptly. Based on the detection results, the leak location can be quickly and accurately located, improving maintenance efficiency. Furthermore, the included collar prevents leaked methanol from spreading within the corresponding hollow cavity, facilitating subsequent cleanup. Additionally, an inert gas is injected into the hollow cavity between the sleeve and the methanol inlet pipe via a short-circuit pipe. When methanol vapor enters the hollow cavity, it cannot mix with oxygen to form a flammable environment, reducing the possibility of explosion and fire, minimizing the safety hazards caused by methanol leaks, and improving the practicality of the methanol dual-fuel engine. Attached Figure Description

[0012] Figure 1 This is a schematic diagram of the structure of the methanol dual-fuel engine of this utility model; Figure 2 This is a front view cross-sectional structural diagram of the methanol input pipe of this utility model; Figure 3 This is a front view schematic diagram of the methanol dual-fuel engine of this utility model; Figure 4 This is a schematic diagram of the cross-sectional structure of the methanol input pipe connection of this utility model; Figure 5 This is a schematic diagram of the air intake pipe connection structure of this utility model.

[0013] The components include: base-1, engine body-2, fuel input pipe-3, methanol input pipe-4, sleeve-5, collar-6, hollow cavity-7, intake pipe-8, exhaust port-9, detection sensor-10, recovery pipe-11, one-way solenoid valve-12, pressure sensor-13, and connector-14. Detailed Implementation

[0014] To further explain the technical solution of this utility model, a detailed description is provided below through specific embodiments.

[0015] like Figures 1 to 5As shown, this utility model provides a methanol dual-fuel engine for ships, including a base 1, an engine body 2, a fuel input pipe 3, a methanol input pipe 4, a sleeve 5, a collar 6, a hollow cavity 7, an intake pipe 8, an exhaust port 9, and a detection sensor 10; the engine body 2 is fixedly installed on the top surface of the base 1, and the fuel input end and the methanol input end of the engine body 2 are respectively connected to the fuel input pipe 3 and the methanol input pipe 4, which are used to transport diesel fuel and methanol fuel respectively; A sleeve 5 is fixedly fitted on the methanol input pipe 4, and two or more collars 6 are provided between the outer surface of the methanol input pipe 4 and the inner ring of the sleeve 5. The collars 6, the methanol input pipe 4 and the sleeve 5 are arranged concentrically, and a gap is provided between two adjacent collars 6 to form a hollow cavity 7. A detection sensor 10 is installed inside the hollow cavity 7. The detection sensor 10 is a methanol concentration sensor, which is used to detect the methanol content inside the hollow cavity 7. A horizontally fixed air inlet pipe 8 for conveying inert gas is provided on the collar 6. The air inlet pipe 8 is provided with two or more exhaust ports 9 corresponding to the hollow cavity 7. The exhaust ports 9 are used to fill the hollow cavity 7 with inert gas. In this embodiment, the inert gas injected into the hollow cavity 7 through the air inlet pipe 8 is nitrogen; In this embodiment, the bottom of the sleeve 5 is fixedly penetrated by two or more recovery pipes 11 that correspond one-to-one with the hollow cavity 7. A one-way solenoid valve 12 is installed on the recovery pipe 11. Leaked methanol can flow into the recovery tank through the recovery pipe 11 to achieve rapid cleaning of leaked methanol. In the above, both the sleeve 5 and the collar 6 are made of stainless steel. In order to facilitate the stable flow of nitrogen gas from the exhaust port 9 into the hollow cavity 7 in the intake pipe 8, the end of the intake pipe 8 near the engine body 2 is designed as a sealed structure. In this embodiment, a connector 14 is provided at the end of the intake pipe 8 away from the engine body 2. The inner diameter of the connector 14 is larger than the inner diameter of the intake pipe 8, so that the intake pipe 8 can be connected to an external nitrogen input device through the connector 14. In this embodiment, a pressure sensor 13 is installed on the top inner side of the hollow cavity 7. The pressure sensor 13 detects the gas pressure of the nitrogen injected into the hollow cavity 7, thereby indirectly determining the amount of nitrogen in the hollow cavity 7. Specifically, the engine body 2 is installed at a designated location in the ship, and the fuel input pipe 3 and methanol input pipe 4 are connected to the diesel delivery system and the methanol delivery system, respectively. Diesel and methanol are input into the engine body 2 through the fuel input pipe 3 and the methanol input pipe 4. Methanol is first injected into the combustion chamber or intake of the engine body 2 through the methanol input pipe 4 and mixed with air. At the same time, a small amount of diesel is injected into the engine body 2 through the fuel input pipe 3. The diesel burns due to its self-ignition property and also ignites the methanol mixture. The resulting force pushes the piston, and the engine body 2 starts to turn, thus providing power to the ship. Furthermore, the external nitrogen input device injects nitrogen into the inlet pipe 8, and the nitrogen is injected into the hollow cavity 7 through the exhaust port 9. The pressure of the nitrogen is detected by the pressure sensor 13 to determine the amount of nitrogen filling in the hollow cavity 7. The injected nitrogen pressure should be slightly higher than atmospheric pressure, but much lower than the working pressure in the methanol input pipe 4 to avoid excessive pressure on the sleeve 5. Because nitrogen is filled outside the methanol input pipe 4, and oxygen in the hollow cavity 7 is discharged through the recovery pipe 11 during nitrogen filling, the hollow cavity 7 is filled with nitrogen. When methanol vapor enters the hollow cavity due to damage to the methanol input pipe 4, it cannot mix with oxygen to form a flammable environment, reducing the possibility of explosion and fire. If methanol leaks, the leaked methanol will enter the corresponding hollow cavity 7. Each hollow cavity 7 is blocked by the collar 6 to prevent the leaked methanol from spreading. At the same time, the detection sensor 10 can detect methanol in time and transmit the information to the control backend connected to it. Since one detection sensor 10 corresponds to one hollow cavity 7, it is convenient for staff to find the leak point for repair in time, which brings convenience to the maintenance work.

[0016] The above description is merely a preferred embodiment of the present utility model and is not intended to limit the present utility model. Although the present utility model has been described in detail with reference to the foregoing embodiments, those skilled in the art can still modify the technical solutions described in the foregoing embodiments or make equivalent substitutions for some of the technical features. Any modifications, equivalent substitutions, improvements, etc., made within the spirit and principles of the present utility model should be included within the protection scope of the present utility model.

Claims

1. A methanol dual-fuel engine for ships, comprising a base and an engine body mounted on the base, wherein a fuel input end and a methanol input end of the engine body are respectively connected to a fuel input pipe and a methanol input pipe; Its features are, The methanol input pipe is fitted with a sleeve, and two or more collars are provided between the outer surface of the methanol input pipe and the inner ring of the sleeve. A gap is provided between two adjacent collars to form a hollow cavity. A detection sensor is installed in the hollow cavity to detect the methanol content in the hollow cavity. An inlet pipe for conveying inert gas is fixedly passed through the collar. The inlet pipe has two or more exhaust ports that correspond one-to-one with the hollow cavity. The exhaust ports are used to fill the hollow cavity with inert gas.

2. The methanol dual-fuel engine for ships according to claim 1, characterized in that: The bottom of the sleeve has two or more recovery tubes that correspond one-to-one with the hollow cavity, and one-way solenoid valves are installed on the recovery tubes.

3. The methanol dual-fuel engine for ships according to claim 1, characterized in that: Both the sleeve and the collar are made of stainless steel.

4. The methanol dual-fuel engine for marine applications according to claim 1, characterized in that: The intake pipe has a sealed structure at the end closest to the engine body.

5. The methanol dual-fuel engine for ships according to claim 1, characterized in that: The intake pipe is provided with a connector at the end away from the engine body, and the inner diameter of the connector is larger than the inner diameter of the intake pipe.

6. The methanol dual-fuel engine for ships according to claim 1, characterized in that: The detection sensor is a methanol concentration sensor.

7. A methanol dual-fuel engine for ships according to claim 1, characterized in that: A pressure sensor is installed on the top inner side of the hollow cavity.

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