Coated type cylinder cover air inlet channel methanol injection system

Abstract

The utility model relates to a coating type cylinder cover air inlet channel methanol injection system, which relates to the field of ship engineering and power systems and comprises a cylinder cover, a coating type adapter block obliquely arranged at one end of the top of the cylinder cover, a pressing block obliquely arranged at the top of the coating type adapter block and double-wall pipes transversely arranged on two sides of the pressing block. The top of the alcohol sprayer is wrapped in the wrapping type adapter block, and the bottom of the alcohol sprayer penetrates through the top of the cylinder cover. By means of the innovative wrapping type design and the double-wall pipe structure, the leakproofness and safety of the system are improved, and methanol leakage is effectively prevented.

Description

Technical Field

[0001] This utility model relates to the fields of marine engineering and power systems, and in particular to a methanol injection system for a covered cylinder head intake manifold. Background Technology

[0002] Currently, methanol injection technology is mainly divided into two types: direct injection and port injection. While direct injection achieves higher combustion efficiency, its complex system, high cost, and significant modifications to the engine structure limit its widespread application. In contrast, port injection technology, due to its lower technical difficulty and better premixing of methanol and air, has become the mainstream research direction for methanol alternative fuel technology.

[0003] However, methanol is highly corrosive and toxic, which places higher demands on the safety of methanol injection systems. Current methanol injection systems still have shortcomings in sealing and stability, potentially leading to methanol leaks. This not only affects the normal operation of the system but may also pose hazards to the environment and operators. Furthermore, the structural design of existing systems often fails to fully consider the physicochemical properties of methanol, resulting in suboptimal combustion efficiency. Utility Model Content

[0004] The purpose of this invention is to provide a methanol injection system for the cylinder head intake manifold, which improves the system's airtightness and safety through an innovative encapsulation design and double-walled pipe structure, effectively preventing methanol leakage.

[0005] To achieve the above objectives, the present invention provides a covered cylinder head intake manifold methanol injection system, including a cylinder head, a covered adapter block obliquely disposed at one end of the top of the cylinder head, a pressure block obliquely disposed at the top of the covered adapter block, and a double-walled tube horizontally disposed on both sides of the pressure block. The top of the methanol injector is covered inside the covered adapter block and the bottom passes through the top of the cylinder head.

[0006] Preferably, the double-walled tube includes an inner tube serving as a methanol delivery channel, an outer tube sleeved on the outside of the inner tube, and a connecting block connecting the outer surface of the inner tube and the inner surface of the outer tube. The outer tube can be connected to a negative pressure machine.

[0007] Preferably, the inner tube can be a nitrogen purging channel after shutdown, used to blow away residual methanol in the piping system.

[0008] Preferably, the connecting block has a groove.

[0009] Preferably, the top of the enclosed adapter block is provided with a groove for interlocking with the top of the pressure block, and a sealing ring is provided for sealing.

[0010] Preferably, the encapsulated adapter block has a sealing ring on the end face connected to the cylinder head for sealing.

[0011] Preferably, the pressure block is provided with a suction hole to extract leaked methanol vapor.

[0012] Preferably, bolts one, two, and three are distributed at different positions on the outer surface of the encased adapter block to connect with the cylinder head; the pressure block is provided with long bolts to connect with the encased adapter block.

[0013] Preferably, the methanol injector is arranged obliquely along the air intake direction, which reduces the methanol injection resistance and allows for more uniform premixing of methanol and air through two methanol injectors, thereby improving combustion efficiency.

[0014] Preferably, the top of the alcohol injector is provided with a methanol inlet that communicates with channel one inside the pressure block for injecting methanol into the air intake, and channel one can also be used as a purge port; the top of the alcohol injector is provided with a cable interface that communicates with channel two inside the pressure block and is sealed by a sealing ring, for connecting a cable to control the operation of the alcohol injector.

[0015] In summary, this utility model has the following beneficial technical effects:

[0016] This system achieves more uniform premixing of methanol and air by incorporating two methanol injectors. This uniform premixing significantly improves combustion efficiency, ensuring complete combustion of methanol in the intake manifold, thereby optimizing engine performance and fuel economy.

[0017] The system employs an innovative encapsulated design, enclosing the methanol injector within an encapsulated adapter block and pressure block. This design significantly improves structural stability and effectively prevents methanol leakage, thereby greatly enhancing the system's safety and reliability.

[0018] The low-pressure methanol piping system employs a double-walled pipe structure, with the inner pipe serving as the methanol delivery channel and the outer pipe connected to the negative pressure unit. This double-walled design not only improves the system's sealing performance but also further prevents methanol leakage, enhancing the overall safety of the system.

[0019] The external pipe is connected to the negative pressure unit, and any potential methanol vapor leaks are continuously monitored and extracted through the suction port. This design not only prevents methanol vapor from corroding the system but also serves as a leak detection and early warning system, ensuring the long-term stable operation of the system.

[0020] The inner pipe serves as both a methanol delivery channel and a nitrogen purging channel after system shutdown. After system shutdown, nitrogen is purged through the inner pipe to thoroughly remove residual methanol from the piping system, ensuring system cleanliness and safety while simplifying maintenance procedures. Attached Figure Description

[0021] Figure 1 This is a schematic diagram of the structure of the methanol injection system for the cylinder head intake manifold of this utility model;

[0022] Figure 2 This is a schematic diagram of the structure of the covered adapter block in the methanol injection system of the covered cylinder head intake manifold of this utility model;

[0023] Figure 3 This is an exploded view of the covered adapter block and pressure block in the methanol injection system of the covered cylinder head intake manifold of this utility model.

[0024] Figure 4 This is a cross-sectional view of the methanol injection system for the cylinder head intake manifold of this utility model.

[0025] Figure 5 This is a cross-sectional view of the pressure block and double-walled pipe in the methanol injection system of the cylinder head intake manifold of this utility model.

[0026] Figure 6 This is an exploded view of the double-walled pipe in the methanol injection system of the cylinder head intake manifold of this utility model.

[0027] Reference numerals: 1. Cylinder head; 2. Encased adapter block; 3. Pressure block; 4. Double-walled tube; 5. Methanol injector; 6. Bolt 1; 7. Bolt 2; 8. Bolt 3; 9. Long bolt; 10. Cable interface; 11. Methanol inlet; 12. Process hole 1; 13. Process hole 2; 14. Channel 1; 15. Channel 2; 16. Sealing ring 1; 17. Sealing ring 2; 18. Sealing ring 3; 19. Sealing ring 4; 20. Suction hole; 21. Sealing ring 5; 22. Sealing ring 6; 23. Inner tube; 24. Connecting block; 25. Outer tube; 26. Weld joint. Detailed Implementation

[0028] The technical solutions of the present utility model will be clearly and completely described below with reference to the accompanying drawings of the embodiments. Obviously, the described embodiments are only some embodiments of the present utility model, and not all embodiments. Based on the embodiments of the present utility model, all other embodiments obtained by those of ordinary skill in the art without creative effort are within the protection scope of the present utility model.

[0029] This novel encapsulated cylinder head intake manifold methanol injection transfer system is an innovative methanol injection solution designed to improve methanol combustion efficiency and reduce carbon emissions. Through optimized design, the system ensures safety and stability, providing a reliable solution for methanol alternative fuel technology in the marine sector.

[0030] The system's overall structure consists of several parts, including a cylinder head 1, an encased adapter block 2, a pressure block 3, a double-walled tube 4, and an alcohol injector 5. The encased adapter block 2 and pressure block 3 enclose the alcohol injector 5, forming a unified structure. This encasing design enhances the overall stability of the system. The encased adapter block 2 is fastened to the cylinder head 1 by bolts 6, 7, and 8, and sealed with a sealing ring 18. The pressure block 3 is pressed onto the encased adapter block 2 by four long bolts 9, and sealed with a sealing ring 19. This design not only improves the system's structural stability but also effectively prevents methanol leakage, thereby enhancing the system's safety.

[0031] The cylinder head 1, serving as the system's base, has a complex internal structure, including multiple air passages and mounting holes. Located at the bottom of the system, the cylinder head 1 provides mechanical support and air passage connections for other components. Through its internal air passages, the cylinder head 1 ensures the mixing and delivery of methanol and air, making it a fundamental component of the entire system.

[0032] The encasing adapter block 2 is an angled three-dimensional structure installed at one end of the cylinder head 1 and secured by bolts 6, 7, and 8. Internally, it contains two channels for encasing the alcohol injector 5 and four mounting holes for connecting long bolts 9. The encasing adapter block 2 connects to the cylinder head 1 and is sealed with a sealing ring 18 on its contact face. The entrance to the channel for installing the alcohol injector 5 is located at the center of the sealing ring 18, ensuring the system's airtightness and safety. Bolts 6, 7, and 8 are standard hexagonal bolts, installed at different positions on the encasing adapter block 2. These bolts secure the encasing adapter block 2 to the cylinder head 1 through tightening, ensuring its installation stability.

[0033] The pressure block 3 is installed on the encasing adapter block 2 and tightened by four long bolts 9. It has multiple channels, mounting holes, and sealing grooves inside. The pressure block 3 connects to the encasing adapter block 2, which is also angled and located at the angled top of the pressure block 3. The angled top of the encasing adapter block 2 has a groove for interlocking with the bottom of the pressure block 3, and the side wall of this groove is sealed to the bottom side of the pressure block by a sealing ring 19, further ensuring the stability and sealing of the alcohol sprayer 5. The long bolts 9 are slender hexagonal bolts, four in total, installed on the pressure block 3. The long bolts 9 fix the pressure block 3 to the encasing adapter block 2 through tightening, ensuring the installation stability of the pressure block 3.

[0034] Double-walled pipes 4 are installed on both sides of the pressure block 3. Each side of the double-walled pipe 4 includes an inner pipe 23, an outer pipe 25, and a connecting block 24. The inner pipe 23 and the outer pipe 25 form the double-walled pipe 4. The inner pipe 23 serves as the methanol delivery channel, the outer pipe 25 is connected to the negative pressure unit, and the connecting block 24 is used to fix and connect the channels. The inner pipe 23 is a slender cylindrical pipe, the outer pipe 25 is a thick cylindrical pipe, and the connecting block 24 is a grooved annular structure. The inner pipe 23 passes through the outer pipe 25, and the connecting block 24 is fitted onto the outer surface of the inner pipe 23 and connected to the inner surface of the outer pipe 25. There are two connecting blocks 24, distributed at both ends of the outer pipe 25. Each end of the outer pipe 25 has three circumferentially distributed welding joints 26 for welding the connecting blocks 24 to the outer pipe 25, thus forming a stable structure. The inner pipe 23 serves as both a methanol channel and a nitrogen purging channel after shutdown, which can blow away residual methanol in the piping system. Its simple structure ensures the safety and stability of the system. The double-walled tube 4 improves the system's sealing and safety through its double-walled structure, while also providing a methanol delivery channel. Furthermore, the pressure block 3 has integrally connected ring structures between the ends of the inner tube 23 and the outer tube 25, and on the outer surface of the outer tube 25. These two ring structures contact the outer surfaces of the inner tube 23 and outer tube 25 ends respectively, and are respectively sealed with sealing rings 6 22 and 5 21. Multiple process holes 12 and 2 13 are laterally distributed inside the pressure block 3. Both process holes 12 and 2 13 are circular holes. The six grooves on the connecting block 24, along with process holes 12 and 2 13, ensure communication between the connecting block 24 and the channels between the outer tube 25 and the inner tube 23.

[0035] The methanol injector 5 is a slender structure with a methanol inlet 11 and a cable interface 10 at the top, with the methanol inlet 11 located at the center of the top. The bottom of the injector 5 is obliquely inserted into the intake manifold of the cylinder head 1 and sealed by a sealing ring 3 18. The top of the injector 5 is enclosed within the channel of the pressure block 3, and a sealing ring 2 17 is installed below the top of the injector 5 (containing the methanol inlet 11 and cable interface 10) and between it and the channel within the pressure block 3 for sealing. The methanol inlet 11 at the top of the injector 5 is a circular interface that connects to channel 14 within the pressure block 3, injecting methanol into the intake manifold. The main function of the injector 5 is to inject methanol into the intake manifold for premixing with air, thereby improving combustion efficiency. Additionally, channel 14 also serves as a purge port, ensuring system cleanliness and safety. The cable interface 10 at the top of the injector 5 is a circular interface that connects to channel 2 15 within the pressure block 3 and is sealed by a sealing ring 16. Its main function is to connect the cable for controlling the operation of the injector 5.

[0036] Sealing ring 16, sealing ring 27, sealing ring 318, sealing ring 419, sealing ring 521 and sealing ring 622 are all circular sealing rings, which are installed at different interfaces and connections. These sealing rings ensure the sealing of each connection and prevent methanol leakage.

[0037] The advantages and highlights of this utility model's enclosed intake duct methanol injection transfer system are as follows:

[0038] 1. The two methanol injectors 5 make the methanol and air premix more evenly, thereby improving the combustion efficiency; and the methanol injectors 5 are arranged obliquely along the air intake direction, which reduces the methanol injection resistance.

[0039] 2. The encapsulated design ensures high structural stability, prevents methanol leakage, and improves system safety.

[0040] 3. The low-pressure methanol pipeline adopts a double-walled pipe structure, which has good system sealing and is not easy to leak methanol, thus improving the safety of the system.

[0041] 4. The outer pipe 25 is connected to the negative pressure machine. The leaked methanol vapor is extracted through two suction holes 20 to prevent the leaked methanol from corroding the system and to play a role in leak detection and early warning, thus ensuring the safety and stability of the system.

[0042] 5. Inner pipe 23 serves as both a methanol channel and a nitrogen purging channel after shutdown, blowing away residual methanol in the piping system, ensuring the cleanliness and safety of the system, and its simple structure guarantees the safety and stability of the system.

[0043] Through the above design, the enclosed cylinder head intake manifold methanol injection transfer system improves methanol combustion efficiency while ensuring system safety and stability, providing a reliable solution for methanol alternative fuel technology in the marine field.

[0044] Finally, it should be noted that the above description is only 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 injection system for the intake manifold of a covered cylinder head, characterized in that, The device includes a cylinder head (1), a wrap-around adapter block (2) obliquely disposed at one end of the top of the cylinder head (1), a pressure block (3) obliquely disposed at the top of the wrap-around adapter block (2), and a double-walled tube (4) horizontally disposed on both sides of the pressure block (3). The top of the methanol injector (5) is wrapped inside the wrap-around adapter block (2) and the bottom passes through the top of the cylinder head (1). The double-walled tube (4) includes an inner tube (23) serving as a methanol conveying channel, an outer tube (25) sleeved on the outside of the inner tube (23), and a connecting block (24) connecting the outer surface of the inner tube (23) and the inner surface of the outer tube (25). The outer tube (25) can be connected to a negative pressure machine. The pressure block (3) is provided with a suction hole (20) to extract leaked methanol vapor.

2. The methanol injection system for the enclosed cylinder head intake manifold according to claim 1, characterized in that, The inner tube (23) can be a nitrogen purging channel after shutdown, used to blow away residual methanol in the pipeline system.

3. The methanol injection system for the enclosed cylinder head intake manifold according to claim 2, characterized in that, The connecting block (24) is provided with a groove.

4. The methanol injection system for the enclosed cylinder head intake manifold according to any one of claims 1-3, characterized in that, The top of the enclosed adapter block (2) is provided with a groove for interlocking with the top of the pressure block (3), and is provided with a sealing ring four (19) for sealing.

5. The methanol injection system for the enclosed cylinder head intake manifold according to claim 4, characterized in that, The encapsulated adapter block (2) has a sealing ring three (18) on the end face connected to the cylinder head (1) for sealing.

6. The methanol injection system for the enclosed cylinder head intake manifold according to claim 5, characterized in that, The outer surface of the encased adapter block (2) is provided with bolts 1 (6), bolt 2 (7) and bolt 3 (8) at different positions to connect with the cylinder head (1); the pressure block (3) is provided with long bolts (9) to connect with the encased adapter block (2).

7. The methanol injection system for the enclosed cylinder head intake manifold according to any one of claims 1-3, characterized in that, The methanol injector (5) is arranged obliquely along the air intake direction, which reduces the methanol injection resistance and makes the methanol and air premix more evenly through the two methanol injectors (5), thereby improving the combustion efficiency.

8. The methanol injection system for the enclosed cylinder head intake manifold according to claim 7, characterized in that, The top of the alcohol sprayer (5) is provided with a methanol inlet (11) which is connected to the first channel (14) in the pressure block (3) for spraying methanol into the air intake. The first channel (14) can also be used as a purge hole. The top of the alcohol sprayer (5) is provided with a cable interface (10) which is connected to the second channel (15) in the pressure block (3) and sealed by a sealing ring (16) for connecting a cable to control the operation of the alcohol sprayer (5).

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