A fuel supply device for a marine methanol engine

Abstract

The present application relates to the technical field of ship methanol delivery, and specifically discloses a marine methanol engine fuel supply device, which comprises a fuel storage and supply unit, a pair of double-path marine level temperature control structures and a marine detection control unit, the pair of double-path marine level temperature control structures are connected in series, one of the double-path marine level temperature control structures is connected with the fuel storage and supply unit, the marine detection control unit is arranged between the double-path marine level temperature control structures, and the marine detection control unit connects the double-path marine level temperature control structures in series. The present application is fully adapted to the safety specifications of domestic high-tech ships, the full-working-condition requirements of ocean navigation and the green and low-carbon development requirements through the cooperative matching of the fuel storage and supply unit, the double-path marine level temperature control structures and the marine detection control unit.

Description

Technical Field

[0001] This invention relates to the field of methanol transportation technology for ships, specifically a fuel supply device for a marine methanol engine. Background Technology

[0002] With the ongoing green and low-carbon transformation of the global shipping industry, methanol has become the mainstream alternative to traditional fossil fuels for marine engines due to its outstanding characteristics of being clean, environmentally friendly, convenient to store and transport, and renewable. Related technologies for marine methanol engines have also become a key research and development focus in the field of shipping power. Among them, the fuel supply system, as the core supporting unit of the methanol engine, directly determines the engine's operating efficiency, stability, and reliability.

[0003] Currently, most existing marine methanol engines use a single pump body direct supply structure for fuel delivery. Although this structure has the advantages of simple construction and low initial investment cost, it has exposed significant technical defects in the complex and variable operating conditions of ships sailing on the high seas, and can no longer meet the requirements of efficient, stable and energy-saving operation of methanol engines.

[0004] Methanol fuel has a much higher latent heat of vaporization than conventional marine diesel, and its evaporation and atomization characteristics are highly sensitive to temperature. Existing single-pump direct-supply structures only mechanically transport methanol fuel from the storage tank to the engine, lacking targeted temperature control capabilities. This prevents synchronized and precise temperature control of the fuel and engine intake air, resulting in extremely low temperature matching between fuel and intake air, uneven gas-liquid mixing, and a high likelihood of localized poor atomization. These defects directly lead to incomplete combustion of methanol fuel in the engine cylinders, significantly reducing fuel combustion efficiency, increasing pollutant emissions, significantly increasing the risk of engine knock, severely affecting engine stability, and accelerating wear on internal engine components, thus drastically shortening the overall service life of the equipment. Summary of the Invention

[0005] The purpose of this invention is to provide a fuel supply device for marine methanol engines. This invention addresses the technical shortcomings of existing marine methanol engine fuel delivery systems, which use a single pump, resulting in inadequate temperature control, poor gas-liquid mixing, low energy utilization, poor combustion stability, and the lack of real-time status monitoring. To solve these problems, this invention provides a fuel supply device for marine methanol engines. This device aims to achieve precise temperature control of methanol fuel and intake air, recover and utilize engine waste heat, promote efficient gas-liquid mixing, stabilize fuel supply temperature, and simultaneously monitor the state of the mixed medium in real time. Ultimately, it aims to improve fuel combustion efficiency, reduce engine knocking, and achieve energy conservation and consumption reduction, making it suitable for the efficient and stable operation of methanol engines under complex marine navigation conditions.

[0006] To achieve the above objectives, the present invention provides the following technical solution: a marine methanol engine fuel supply device, comprising a fuel storage and supply unit, a pair of dual-path marine-grade temperature control structures, and a marine detection and control unit. The pair of dual-path marine-grade temperature control structures are connected in series, and one of the dual-path marine-grade temperature control structures is connected to the fuel storage and supply unit. The marine detection and control unit is disposed between the dual-path marine-grade temperature control structures, and the marine detection and control unit connects the dual-path marine-grade temperature control structures in series. The fuel storage and supply unit is used to store and supply fuel. The pair of dual-path marine-grade temperature control structures are used for fuel temperature control and intake air temperature control, respectively, to promote gas-liquid mixing and achieve a stable temperature supply. Simultaneously, the dual-path marine-grade temperature control structures can be connected in series with the engine's cooling system. By utilizing the heat energy absorbed after the engine is cooled by the cooling medium, the supplied fuel and gas are preheated, achieving energy saving, promoting uniform evaporation, improving combustion stability, and reducing knocking. The marine detection and control unit is used for gas intake and detecting the output temperature after gas-liquid mixing.

[0007] Preferably, the fuel storage and supply unit is used to store and supply fuel, and includes a methanol storage tank and an explosion-proof delivery pump unit; the upper wall of the methanol storage tank is provided with an injection port, and the bottom of the upper wall and the front side wall of the methanol storage tank are respectively connected to a return pipe and an output pipe, and the explosion-proof delivery pump unit is located on the right side of the methanol storage tank, and the extraction end of the explosion-proof delivery pump unit is connected to the output pipe.

[0008] Preferably, the pair of the dual-path marine-grade temperature control structures are used for fuel temperature control and intake air temperature control respectively, promoting gas-liquid mixing to achieve a stable temperature supply. At the same time, the dual-path marine-grade temperature control structure can be connected in series with the engine's cooling system. By utilizing the heat energy absorbed after the engine is cooled by the cooling medium, the supplied fuel and gas are preheated, achieving energy saving, promoting uniform evaporation, improving combustion stability, and reducing knocking.

[0009] Preferably, the dual-path marine-grade temperature control structure includes a marine-grade heat exchange regulating component, a pair of marine-grade sealing fitting components, and an electric heating rod body; the marine-grade heat exchange regulating component is located on the right side of the explosion-proof delivery pump group and is connected to the output end of the explosion-proof delivery pump group; the pair of marine-grade sealing fitting components are symmetrically arranged inside the marine-grade heat exchange regulating component; and the electric heating rod body is fixedly mounted on one of the marine-grade sealing fitting components.

[0010] Preferably, the marine-grade heat exchange regulating assembly includes a support frame, a swing frame, a discharge pipe, an inner heat exchange cylinder, an outer heat exchange cylinder, two pairs of adapter pipes, an input cover, a swing rod, and a hydraulic cylinder body; one end of the support frame is provided with an arc-shaped bayonet, one end of the swing frame is fixedly mounted on the support frame, and the other end of the swing frame is L-shaped; one end of the discharge pipe is detachably snapped into the bayonet of the support frame, and the discharge pipe is fixed by bolts; one end of the inner heat exchange cylinder is fixedly fitted onto the top of the discharge pipe, and a rotating groove is opened on the circumference of the bottom side wall of the inner heat exchange cylinder; the outer heat exchange cylinder is movably fitted onto the outside of the inner heat exchange cylinder, and the bottom of the outer heat exchange cylinder is movably snapped into the rotating groove; the outer heat exchange cylinder can rotate, and the upper wall of the outer heat exchange cylinder is along the center... The part is provided with a concave sealing groove. One end of each of the two pairs of adapter pipes is symmetrically connected to the left and right side walls of the heat exchange outer cylinder, and they are staggered and symmetrical near the upper and lower ends. The adapter pipe at the top is used for input, and the adapter pipe at the bottom is used for output. The input cover is detachably screwed to the top of the heat exchange inner cylinder and is movably fastened to the heat exchange outer cylinder. The lower wall of the input cover is provided with a protrusion that fits with the sealing groove. The middle of the input cover is provided with an input port that connects to the heat exchange inner cylinder. One end of the swing rod is fixedly set at the bottom of the right side wall of the heat exchange outer cylinder. One end of the hydraulic cylinder body is movably connected to the upper wall of the other end of the swing frame, and the telescopic end of the hydraulic cylinder body is inclinedly movably connected to the lower wall of the other end of the swing rod.

[0011] Preferably, a pair of marine sealing fitting components are respectively fixedly installed on the right side wall of the inner heat exchange cylinder and the left side wall of the outer heat exchange cylinder, and the marine sealing fitting components are correspondingly installed in the same direction between the staggered transfer pipes; the marine sealing fitting component includes a sleeve, a fitting seat, a pair of telescopic rods and a pair of springs; the sleeve is fixedly installed on the left side wall of the outer heat exchange cylinder, and the other end of the sleeve is movably attached to the left side wall of the outer heat exchange cylinder; the fitting seat is movably embedded in the sleeve, and one end of the fitting seat is attached to the outer wall of the inner heat exchange cylinder; one end of the pair of telescopic rods is respectively fixedly connected to the upper and lower side walls of the fitting seat, and the other end of the telescopic rods movably penetrates the left side wall of the outer heat exchange cylinder; the pair of springs are respectively movably fitted in the middle of the telescopic rods, and the springs are located in the sleeve.

[0012] Preferably, the marine detection and control unit is used for gas intake and detection of the output temperature after gas-liquid mixing. It includes a Venturi throat, a detection tube, and a temperature detector. The fuel input end of the Venturi throat is connected to the discharge pipe of one of the dual-path marine-grade temperature control structures via a double-walled fuel delivery pipe. The gas input end of the Venturi throat is connected to the discharge pipe of another dual-path marine-grade temperature control structure. One end of the detection tube is detachably connected to the output end of the Venturi throat, and the other end of the detection tube can be connected to an internal combustion engine. The temperature detector is detachably installed in the middle of the detection tube and can be located inside the detection tube.

[0013] Preferably, one of the input covers of the dual-path marine-grade temperature control structure is connected to the output end of the explosion-proof delivery pump unit via a pressure-resistant delivery pipeline.

[0014] Preferably, the pair of the dual-path marine-grade temperature control structures are connected in series via a waste heat medium input series pipe and a waste heat medium output series pipe, with the input and output transfer pipes connected in series.

[0015] Preferably, the outer heat exchange cylinder is driven by the extension of the main body of a hydraulic cylinder, enabling it to rotate on the inner heat exchange cylinder.

[0016] Preferably, the rotation of the heat exchange outer cylinder can adjust the spacing of the marine sealing fitting components, thereby adjusting the size of the space on both sides of the marine sealing fitting components.

[0017] This invention proposes a marine methanol engine fuel supply device. Compared to traditional single-pump delivery, this invention achieves precise temperature control, energy efficiency, stable combustion, and intelligent adaptation of methanol fuel supply through the coordinated operation of a fuel storage and supply unit, a pair of series-connected dual-path marine-grade temperature control structures, and a marine detection and control unit. It possesses the following advantages: 1. The device is equipped with a pair of series-connected dual-path marine-grade temperature control structures to specifically control the temperature of methanol fuel and engine intake air, achieving precise temperature matching between fuel and intake air. This solves the problem of uneven gas-liquid mixing at the source and promotes full atomization and evaporation of methanol fuel. At the same time, the dual-path marine-grade temperature control structure can drive the heat exchange outer cylinder to rotate via a hydraulic cylinder, flexibly adjusting the spacing of the marine-grade sealing fitting components to achieve dynamic adjustment of the temperature control space. This adapts to the temperature control requirements of different fuel supply amounts, further improving the gas-liquid mixing effect, allowing the fuel to burn more completely in the engine, and effectively improving combustion efficiency.

[0018] 2. The dual-path marine-grade temperature control structure can be connected in series with the cooling system of the marine engine to recover the waste heat absorbed by the cooling medium and use this heat energy to preheat the fuel and intake air, replacing the traditional additional energy preheating method, realizing the secondary utilization of energy and significantly reducing the overall energy consumption of the ship; at the same time, in conjunction with the auxiliary temperature control of the electric heating rod body, temperature control is supplemented only when the waste heat is insufficient or during cold start.

[0019] 3. The device utilizes two isolated chambers within its dual-path marine-grade temperature control structure, adjusting their size to achieve internal heat exchange regulation. This ensures a stable temperature supply for fuel and intake air, preventing imbalances in fuel injection and combustion rhythm caused by temperature fluctuations. Simultaneously, efficient gas-liquid mixing makes the combustion process within the engine smoother, fundamentally improving combustion stability, significantly reducing the probability of engine knocking, minimizing wear on internal engine components, extending engine lifespan, and lowering ship equipment maintenance costs.

[0020] 4. The marine detection and control unit is equipped with a Venturi throat and a temperature detector. The Venturi throat enables efficient mixing of fuel and intake air, while the temperature detector can detect the output temperature of the mixed medium in real time, accurately grasp the fuel supply status, and provide data for the adjustment of the dual-path marine-grade temperature control structure. Each unit of the device adopts a modular design. The fuel storage and supply unit, the dual-path marine-grade temperature control structure, and the marine detection and control unit are detachably connected by pipelines. The heat exchange outer cylinder, input cover, and other components of the dual-path marine-grade temperature control structure are also detachable. This not only facilitates flexible adjustment according to different navigation conditions of the ship, but also greatly reduces the difficulty of later maintenance and parts replacement of the device.

[0021] 5. This device integrates functions such as fuel storage, power transmission, dual-path temperature control, gas-liquid mixing, and temperature detection into one unit. Through the pipeline and series structure design, it achieves the coordinated linkage of various functions. Compared with the combination design of multiple independent auxiliary devices in the existing technology, it greatly simplifies the overall layout of the marine methanol engine fuel supply system, reduces the space occupied by the device, and is more suitable for the limited installation space requirements of the ship's engine room.

[0022] In summary, this invention, through the coordinated operation of a fuel storage and supply unit, a dual-path marine-grade temperature control structure, and a marine detection and control unit, fully adapts to the safety standards of domestic high-tech ships, the full-condition requirements of ocean voyages, and the requirements of green and low-carbon development. It addresses the core pain points of existing solutions—insufficient safety protection and susceptibility to fuel supply interruptions under extreme sea conditions—through a full-process explosion-proof and leak-proof safety design, anti-sway storage, and dual redundant supply circuits, ensuring the stability and reliability of long-term ocean voyages. Furthermore, it significantly improves energy efficiency and reduces ship operating energy consumption through the multi-heat source gradient waste heat recovery and utilization of the ship's main engine and auxiliary engines, aligning with the shipping industry's dual-carbon development goals of energy conservation and emission reduction. Attached Figure Description

[0023] Figure 1 This is a schematic diagram of the assembly structure of the present invention; Figure 2 This is a schematic diagram of the connection structure of the fuel storage and supply unit of the present invention; Figure 3 This is a schematic diagram of the disassembled structure of the dual-path marine-grade temperature control structure of the present invention; Figure 4 This is a schematic diagram of the marine sealing and fitting assembly structure of the present invention; Figure 5 This is a schematic diagram of the assembly structure of the dual-path marine-grade temperature control structure of the present invention; Figure 6 This is a schematic diagram of the structure of the marine detection and control unit of the present invention; Figure 7 for Figure 4 A magnified view of section A in the image.

[0024] In the diagram: 1. Fuel storage and supply unit; 11. Methanol storage tank; 12. Explosion-proof delivery pump set; 13. Inlet; 14. Return pipe; 15. Output pipe; 2. Dual-path marine-grade temperature control structure; 21. Marine-grade heat exchange regulating component; 211. Support frame; 212. Swing frame; 213. Discharge pipe; 214. Inner heat exchange cylinder; 215. Outer heat exchange cylinder; 216. Transfer pipe; 217. Input cover; 218. Swing rod; 219. Hydraulic cylinder body; 22. Marine sealing fitting component; 221. Sleeve; 222. Fitting seat; 223. Telescopic rod; 224. Spring; 23. Heating rod body; 3. Marine detection and control unit; 31. Venturi throat; 32. Detection pipe; 33. Temperature detector; 4. Double-walled fuel delivery pipe; 5. Pressure-resistant delivery pipe; 6. Waste heat medium input series pipe; 7. Waste heat medium output series pipe. Detailed Implementation

[0025] The technical solutions of the embodiments of the present invention will be clearly and completely described below with reference to the accompanying drawings. Obviously, the described embodiments are only some embodiments of the present invention, and not all embodiments. Based on the embodiments of the present invention, all other embodiments obtained by those skilled in the art without creative effort are within the scope of protection of the present invention.

[0026] Please see Figures 1-7 This invention provides a technical solution: a marine methanol engine fuel supply device, comprising a fuel storage and supply unit 1, a pair of dual-path marine-grade temperature control structures 2, and a marine detection and control unit 3. The pair of dual-path marine-grade temperature control structures 2 are connected in series, and one of the dual-path marine-grade temperature control structures 2 is connected to the fuel storage and supply unit 1. The marine detection and control unit 3 is disposed between the dual-path marine-grade temperature control structures 2, and the marine detection and control unit 3 connects the dual-path marine-grade temperature control structures 2 in series. The fuel storage and supply unit 1 is used to store and supply fuel. The pair of dual-path marine-grade temperature control structures 2 are used for fuel temperature control and intake air temperature control, respectively, to promote gas-liquid mixing and achieve a stable supply temperature. Simultaneously, the dual-path marine-grade temperature control structures 2 can be connected in series with the engine's cooling system. By utilizing the heat energy absorbed after the engine is cooled by the cooling medium, the supplied fuel and gas are preheated, achieving energy saving, promoting uniform evaporation, improving combustion stability, and reducing knocking. The marine detection and control unit 3 is used for gas intake and detecting the output temperature after gas-liquid mixing.

[0027] As a preferred embodiment, the fuel storage and supply unit 1 further includes a methanol storage tank 11 and an explosion-proof delivery pump unit 12; the upper wall of the methanol storage tank 11 is provided with an injection port 13, and the upper wall and the bottom of the front side wall of the methanol storage tank 11 are respectively connected to a return pipe 14 and an output pipe 15; the explosion-proof delivery pump unit 12 is located on the right side of the methanol storage tank 11, and the extraction end of the explosion-proof delivery pump unit 12 is connected to the output pipe 15.

[0028] More specifically, the methanol storage tank 11 and the explosion-proof transfer pump unit 12 work together to achieve full-process fuel supply control. Methanol fuel is added into the methanol storage tank 11 through the injection port 13 on the upper wall of the methanol storage tank 11. When the marine methanol engine starts and requires fuel supply, the explosion-proof transfer pump unit 12 starts working. Its extraction end draws out the methanol fuel stored in the methanol storage tank 11 through the output pipe 15 connected to the bottom of the front side wall of the methanol storage tank 11. The explosion-proof transfer pump unit 12 pressurizes the methanol fuel with its own power and delivers it to the dual-path marine-grade temperature control structure 2, providing a continuous power and fuel source for subsequent fuel temperature control and supply. When the engine is running at low load or there is an oversupply of fuel, the system can be activated. When excess methanol fuel is used, it can be returned to the inside of the methanol storage tank 11 through the return pipe 14 connected to the upper wall of the methanol storage tank 11, forming a fuel circulation supply loop to avoid fuel accumulation or excessive pressure in the delivery pipeline. The fuel storage and supply unit 1, through the separate structure design of the injection port 13, return pipe 14 and output pipe 15 of the methanol storage tank 11, realizes independent control of methanol fuel filling, storage, delivery and return. With the precise connection between the explosion-proof delivery pump group 12 and the output pipe 15, it can provide continuous and stable fuel power delivery for the subsequent dual-path marine-grade temperature control structure 2 and engine, and can also realize the recycling of excess fuel through the return pipe 14 to avoid fuel waste and accumulation in the pipeline.

[0029] As a preferred embodiment, the dual-path marine-grade temperature control structure 2 further includes a marine-grade heat exchange regulating component 21, a pair of marine-grade sealing fitting components 22, and an electric heating rod body 23. The marine-grade heat exchange regulating component 21 is located on the right side of the explosion-proof delivery pump group 12 and is connected to the output end of the explosion-proof delivery pump group 12. The pair of marine-grade sealing fitting components 22 are symmetrically arranged inside the marine-grade heat exchange regulating component 21, and the electric heating rod body 23 is fixedly mounted on one of the marine-grade sealing fitting components 22.

[0030] More specifically, precise temperature control is achieved through the coordinated operation of the marine-grade heat exchange regulating component 21, a pair of marine-grade sealing fitting components 22, and the electric heating rod body 23. The pair of dual-path marine-grade temperature control structures 2 correspond to fuel temperature control and intake air temperature control, respectively. When methanol fuel or intake air enters the marine-grade heat exchange regulating component 21, the pair of marine-grade sealing fitting components 22, acting as temperature control actuators, form a temperature control chamber within the component 21 in a symmetrical configuration, providing a closed heat exchange space for fuel and intake air temperature regulation. The electric heating rod body 23 generates heat according to actual temperature control requirements, directly... Heat is transferred to the fuel or intake air in the heat exchange inner cylinder 214 to actively heat the medium. At the same time, the marine-grade heat exchange regulating component 21 can drive a pair of marine-grade sealing fitting components 22 to adjust their relative positions through the action of its own mechanical structure, thereby changing the size of the temperature control chamber and adapting it to the medium with different flow rates in the internal temperature control chamber, thus changing the heat exchange temperature. Furthermore, the internal temperature control chambers on both sides can achieve the flow of heat exchange medium in a single temperature control chamber or the simultaneous flow of hot and cold media on both sides, thereby achieving the temperature control requirements for heat exchange effect and matching the temperature control efficiency with the medium flow rate.

[0031] As a preferred embodiment, the marine-grade heat exchange regulating assembly 21 further includes a support frame 211, a swing frame 212, a discharge pipe 213, a heat exchange inner cylinder 214, a heat exchange outer cylinder 215, two pairs of adapter pipes 216, an inlet cover 217, a swing rod 218, and a hydraulic cylinder body 219. One end of the support frame 211 is provided with an arc-shaped latch. One end of the swing frame 212 is fixedly mounted on the support frame 211, and the other end of the swing frame 212 is L-shaped. One end of the discharge pipe 213 is detachably latched at the latch of the support frame 211, and the discharge pipe 213 is fixed by bolts. One end of the heat exchange inner cylinder 214 is fixedly fitted onto the top of the discharge pipe 213, and a rotating groove is formed on the circumference of the bottom side wall of the heat exchange inner cylinder 214. The heat exchange outer cylinder 215 is movably fitted onto the outside of the heat exchange inner cylinder 214, and the bottom of the heat exchange outer cylinder 215 is movably latched into the rotating groove. The heat exchange outer cylinder 215 can... The outer heat exchange cylinder 215 is rotatable, and a concave sealing groove is provided along the middle of the upper wall of the outer heat exchange cylinder 215. One end of each pair of connecting pipes 216 is symmetrically connected to the left and right side walls of the outer heat exchange cylinder 215, and they are staggered and symmetrical near the upper and lower ends. The connecting pipe 216 at the top is used for input, and the connecting pipe 216 at the bottom is used for output. The input cover 217 is detachably screwed onto the top of the inner heat exchange cylinder 214, and the input cover 217 is movably fastened onto the outer heat exchange cylinder 215. The lower wall of the input cover 217 is provided with a protrusion that fits into the sealing groove. The middle of the input cover 217 is provided with an input port that connects to the inner heat exchange cylinder 214. One end of the swing rod 218 is fixedly set at the bottom of the right side wall of the outer heat exchange cylinder 215. One end of the hydraulic cylinder body 219 is movably connected to the upper wall of the other end of the swing frame 212, and the telescopic end of the hydraulic cylinder body 219 is inclinedly and movably connected to the lower wall of the other end of the swing rod 218.

[0032] More specifically, the marine-grade heat exchange regulating component 21 realizes medium transportation, heat exchange space bearing, dynamic adjustment of temperature control chamber, and sealing protection; the support frame 211 provides basic support for the entire marine-grade heat exchange regulating component 21; the swing frame 212 is fixedly connected to the support frame 211 to form an integrated support structure, and its L-shaped end provides a hinge fulcrum for the hydraulic cylinder body 219, providing stable support for subsequent driving actions; the heat exchange inner cylinder 214 is fixedly fitted on the top of the discharge pipe 213, serving as the core transportation and heat exchange inner channel for fuel or air intake; the heat exchange outer cylinder 215 is rotatably fitted on the outside of the heat exchange inner cylinder 214 through a movable clamping mechanism at its bottom with the rotating groove of the heat exchange inner cylinder 214, and the two together form a double-layer heat exchange chamber, providing heat exchange space for waste heat recovery and medium temperature control; the upper and lower sides of the heat exchange outer cylinder 215 Two pairs of staggered and symmetrically connected transfer pipes 216, with the top transfer pipe 216 used for input and the bottom for output, form a circulation in the internal single-sided space to preheat the medium in the heat exchange inner cylinder 214. The hydraulic cylinder body 219 serves as the drive source, with its cylinder end hinged to the L-shaped end of the swing frame 212 and its telescopic end tilted and hinged to the swing rod 218 fixed to the side wall of the heat exchange outer cylinder 215. When the hydraulic cylinder body 219 telescopically moves, the lever transmission of the swing rod 218 drives the heat exchange outer cylinder 215 to rotate circumferentially around the rotating groove of the heat exchange inner cylinder 214 as the axis, thereby adjusting the relative position of the heat exchange outer cylinder 215 and the heat exchange inner cylinder 214. This provides a power basis for the subsequent spacing adjustment of the marine sealing fitting assembly 22, and provides stable and controllable power for the spacing adjustment of the marine sealing fitting assembly 22.

[0033] As a preferred embodiment, furthermore, a pair of marine sealing fitting components 22 are respectively fixedly installed on the right side wall of the inner heat exchange cylinder 214 and the left side wall of the outer heat exchange cylinder 215, and the marine sealing fitting components 22 are positioned in the same direction and corresponding to each other between the staggered transfer pipes 216; the marine sealing fitting component 22 includes a sleeve 221, a fitting seat 222, a pair of telescopic rods 223 and a pair of springs 224; the sleeve 221 is fixedly installed on the left side wall of the outer heat exchange cylinder 215, and the sleeve 221 is fixedly installed on the right side wall of the outer heat exchange cylinder 215, and the fitting seat 222 is fixedly installed on the right side wall of the inner heat exchange cylinder 214 and the left side wall of the outer heat exchange cylinder 215 is fixedly installed on the right side wall of the inner heat exchange cylinder 214 and the left side wall of the outer heat exchange cylinder 215 is fixedly installed on the right side wall of the inner heat exchange cylinder 214 and the left side wall of the outer heat exchange cylinder 215 is fixedly installed on the right side wall of the inner heat exchange cylinder 214 and the left side wall of the outer heat exchange cylinder 215 is fixedly installed on the right side wall of the outer ... outer heat exchange cylinder 214 and the left side wall of the outer heat exchange cylinder 215 is fixedly installed on the right side wall of the outer heat exchange cylinder 214 and the left side wall of the outer heat exchange cylinder 215 is fixedly installed on the right side wall of the The other end of 21 is movably attached to the outer left side wall of the heat exchange inner cylinder 214. The fitting seat 222 is movably embedded in the sleeve 221, and one end of the fitting seat 222 is attached to the outer wall of the heat exchange inner cylinder 214. One end of a pair of telescopic rods 223 is fixedly connected to the upper and lower side walls of the fitting seat 222, and the other end of the telescopic rods 223 movably penetrates the left side wall of the heat exchange outer cylinder 215. A pair of springs 224 are movably fitted in the middle of the telescopic rods 223, and the springs 224 are located in the sleeve 221.

[0034] More specifically, the marine sealing fitting assembly 22 is positioned in the same direction as the heat exchange inner cylinder 214 and the heat exchange outer cylinder 215, and is misaligned with the connecting pipe 216. This coordinates with the rotation of the heat exchange outer cylinder 215 to achieve dynamic adjustment of the temperature control space. The sleeve 221, as the basic load-bearing component of the marine sealing fitting assembly 22, provides a stable installation and movement guide for the fitting seat 222, the telescopic rod 223, and the spring 224. The end of the fitting seat 222 that is in contact with the heat exchange inner cylinder 214 always remains in contact with the outer wall of the heat exchange inner cylinder 214. The other end of the telescopic rod 223 extends outwards through the left side wall of the heat exchange outer cylinder 215, providing linear guidance for the telescopic movement of the fitting seat 222 and preventing the fitting seat 222 from shifting during movement. The spring 224 is in its natural state. The elastic force pushes the mating seat 222 towards the heat exchange inner cylinder 214, ensuring a tight fit between the mating seat 222 and the outer wall of the heat exchange inner cylinder 214. When the hydraulic cylinder body 219 drives the heat exchange outer cylinder 215 to rotate around the heat exchange inner cylinder 214, the marine sealing mating assembly 22 fixed to the heat exchange outer cylinder 215 moves in a circular motion synchronously with the heat exchange outer cylinder 215, and its relative position changes with another marine sealing mating assembly 22 fixed to the heat exchange inner cylinder 214. The distance between the two is adaptively adjusted according to the rotation angle of the heat exchange outer cylinder 215. During this process, the size of the two spaces isolated by the sleeve 221 changes, thereby changing the volume of heat exchange medium that can be carried inside, and thus changing the heat exchange efficiency and temperature. The two chambers can be used individually or simultaneously for the flow of hot and cold media.

[0035] As a preferred embodiment, the marine detection and control unit 3 further includes a venturi throat 31, a detection tube 32, and a temperature detector 33; the fuel input end of the venturi throat 31 is connected to the discharge pipe 213 of one of the dual-path marine-grade temperature control structures 2 through a double-walled fuel delivery pipe 4, and the gas input end of the venturi throat 31 is connected to the discharge pipe 213 of another heat exchange structure; one end of the detection tube 32 is detachably connected to the output end of the venturi throat 31, and the other end of the detection tube 32 can be connected to an internal combustion engine; the temperature detector 33 is detachably installed in the middle of the detection tube 32, and the temperature detector 33 can be located inside the detection tube 32.

[0036] More specifically, the venturi throat 31, detection tube 32, and temperature detector 33 work together to complete the mixing of fuel and intake air, the delivery of the mixed medium, and temperature detection. The venturi throat 31, as the core component for gas-liquid mixing, utilizes the Venturi effect to create high-speed turbulence within the throat after the fuel and intake air are heated, achieving thorough and uniform mixing and avoiding localized uneven mixing and poor atomization. This lays the foundation for complete combustion of fuel in the internal combustion engine, effectively reducing energy waste caused by incomplete combustion. The temperature detector... The placement of the 33 deep inside the detection tube 32 enables real-time and accurate detection of the mixed medium supply temperature, providing direct data support for the dynamic adjustment of the dual-path marine-grade temperature control structure 2. This forms a closed-loop control of fuel, intake air temperature control, and mixed temperature detection. The overall unit structure is simple in layout and highly integrated in function, and it connects smoothly with the dual-path marine-grade temperature control structure 2 and the internal combustion engine. This not only ensures the stability of gas-liquid mixing and medium transportation, but also enables real-time monitoring of the supply temperature, significantly improving the control accuracy and operational reliability of the entire fuel supply device.

[0037] As a preferred embodiment, further, the input cover 217 of one of the dual-path marine-grade temperature control structures 2 is connected to the output end of the explosion-proof delivery pump group 12 via a pressure-resistant delivery pipe 5; a pair of dual-path marine-grade temperature control structures 2 are connected in series via a waste heat medium input series pipe 6 and a waste heat medium output series pipe 7, connecting the input and output transfer pipes 216 in series; the heat exchange outer cylinder 215 is driven by the extension of the hydraulic cylinder body 219 to rotate on the heat exchange inner cylinder 214; the rotation of the heat exchange outer cylinder 215 can adjust the spacing of the marine sealing fitting assembly 22, thereby adjusting the size of the space on both sides of the marine sealing fitting assembly 22.

[0038] Its detailed connection method is a well-known technology in this field. The following mainly introduces the working principle and process, and the specific work is as follows.

[0039] The marine methanol engine fuel supply system consists of a fuel storage and supply unit 1, a pair of dual-path marine-grade temperature control structures 2, and a marine detection and control unit 3. These components are connected in a sealed series via a double-walled fuel delivery pipe 4, a pressure-resistant delivery pipe 5, a waste heat medium input series pipe 6, and a waste heat medium output series pipe 7. Each unit and component works in concert to sequentially achieve methanol fuel storage and delivery, precise temperature control of fuel and intake air, efficient gas-liquid mixing, and real-time temperature detection of the mixed medium. Ultimately, this provides a stable and uniformly mixed fuel supply to the marine methanol internal combustion engine. The overall workflow is as follows: The operator adds methanol fuel to the methanol storage tank 11 through the injection port 13 on the upper wall of the methanol storage tank 11. When the internal combustion engine starts and needs fuel, the explosion-proof delivery pump group 12 starts, and its extraction end draws methanol fuel from the tank through the output pipe 15 at the bottom of the front side wall of the methanol storage tank 11. After being pressurized, the fuel is delivered to the input cover 217 of one of the dual-path marine-grade temperature control structures 2 responsible for fuel temperature control through the pressure-resistant delivery pipe 5, providing continuous fuel and power for subsequent temperature control. When the internal combustion engine is running at low load and there is an oversupply of fuel, the excess fuel is connected to the return pipe 14 on the upper wall of the methanol storage tank 11 and flows back into the methanol storage tank 11, forming a fuel circulation loop to avoid fuel accumulation or excessive pressure in the pipeline.

[0040] The series temperature control and waste heat utilization of a pair of dual-path marine-grade temperature control structures 2 are as follows: A pair of dual-path marine-grade temperature control structures 2 connect the input and output terminals of the transfer pipe 216 in series via the waste heat medium input series pipe 6 and the waste heat medium output series pipe 7. The two structures have the same working logic and cooperate with each other. Medium entry: Fuel enters the middle inlet of the fuel dual-path marine-grade temperature control structure input cover 217 through the pressure-resistant conveying pipe 5, and enters the heat exchange inner cylinder 214; engine intake air simultaneously enters the heat exchange inner cylinder 214 of another intake dual-path marine-grade temperature control structure 2, realizing independent temperature control and delivery of fuel and intake air; at the same time, the cooling medium of the engine cooling system, after flowing through the engine for cooling and heat exchange, enters the double-layer heat exchange cavity formed by the outer wall of the heat exchange inner cylinder 214 and the inner wall of the heat exchange outer cylinder 215 through the transfer pipe 216; Since the heat exchange chamber is isolated by two sets of marine sealing fitting components 22, it fits a pair of transfer pipes 216 set on both sides respectively, forming the input and output of a separate chamber; Waste heat recovery heat exchange: The cooling medium flows in the double-layer heat exchange cavity and completes the heat transfer through the heat exchange inner cylinder 214. The absorbed engine waste heat is transferred to the fuel or intake air in the heat exchange inner cylinder 214 to achieve preheating and energy saving of the medium. The cooling medium that has completed heat exchange is output through the bottom transfer pipe 216 and forms a series circulation of the cooling medium through the waste heat medium input series pipe 6 and the waste heat medium output series pipe 7. Temperature control chamber adjustment: The hydraulic cylinder body 219 extends and retracts, driving the outer heat exchange cylinder 215 to rotate around the rotating groove at the bottom of the inner heat exchange cylinder 214 via a hinged transmission with the swing frame 212 and the swing rod 218, and is stably supported by the support frame 211 at the bottom; when the outer heat exchange cylinder 215 rotates, it drives the marine sealing fitting assembly 22 fixed inside it to move synchronously, and the relative position of the other marine sealing fitting assembly 22 fixed to the side wall of the inner heat exchange cylinder 214 changes, and the distance between the two is adaptively adjusted with the rotation angle; during this process, the fitting seat 222 The telescopic rod 223 provides linear guidance, and the elastic force of the spring 224 ensures that it is always in close contact with the outer wall of the heat exchange inner cylinder 214, forming an isolation space. This creates a dynamically adjustable closed temperature-controlled chamber between a pair of marine sealing fitting components 22, which can accommodate heat exchange media of different flow rates and change the contact area between the outer wall of the heat exchange inner cylinder and the heat exchange media, thereby achieving temperature control (because the cooling medium absorbs heat from the engine, the thermal energy cannot be electrically controlled, so the space, flow rate, contact area, or the cold and hot media flowing into the two sides of the space are changed to achieve temperature control).

[0041] When cold start, heat circulation cannot be utilized, so active temperature control is required. The electric heating rod body 23 fixed on one of the marine sealing fitting components 22 can be activated according to the actual temperature control requirements to conduct heat to the medium in the temperature control chamber and the outer wall of the heat exchange inner cylinder. The temperature-controlled fuel and intake air are transported outward through the discharge pipe 213; the support frame 211 provides basic support for the entire marine-grade heat exchange regulating assembly 21; the arc-shaped bayonet and bolts cooperate to realize the detachable fixation of the discharge pipe 213; the protrusion on the lower wall of the inlet cover 217 fits into the sealing groove on the upper wall of the heat exchange outer cylinder 215 to achieve the top sealing of the double-layer heat exchange cavity and prevent medium leakage. After precise temperature control, the fuel and intake air are respectively delivered to the fuel input end and gas input end of the Venturi throat 31 through the double-walled fuel delivery pipe 4. The fuel and intake air form a high-speed turbulent flow inside the Venturi throat 31 using the Venturi effect, achieving full and uniform atomization and mixing. The mixed gas-liquid mixture enters the detection pipe 32, which is detachably connected to the output end of the Venturi throat 31, and is directionally delivered to the internal combustion engine along the detection pipe 32. The temperature detector 33 is detachably installed in the middle of the detection pipe 32, with its detection end penetrating deep into the detection pipe 32 and directly contacting the mixed medium. It detects the instantaneous temperature of the mixed medium before it is delivered to the internal combustion engine in real time, accurately captures the temperature status, and feeds the data back to the temperature control system. This provides real-time data for the dynamic adjustment of the hydraulic cylinder body 219 and the electric heating rod body 23 of the dual-path marine-grade temperature control structure 2. Finally, it continuously supplies the internal combustion engine with a stable temperature and uniform mixing, ensuring its stable and efficient combustion.

[0042] Although embodiments of the invention have been shown and described, it will be understood by those skilled in the art that various changes, modifications, substitutions and alterations can be made to these embodiments without departing from the principles and spirit of the invention, the scope of which is defined by the appended claims and their equivalents.

Claims

1. A fuel supply device for a marine methanol engine, characterized in that, It includes a fuel storage and supply unit (1), a pair of dual-path marine-grade temperature control structures (2) and a marine detection and control unit (3). The pair of dual-path marine-grade temperature control structures (2) are connected in series, and one of the dual-path marine-grade temperature control structures (2) is connected to the fuel storage and supply unit (1). The marine detection and control unit (3) is disposed between the dual-path marine-grade temperature control structures (2) and the marine detection and control unit (3) connects the dual-path marine-grade temperature control structures (2) in series. Among them, the fuel storage and supply unit (1) is used to store fuel and supply it. The pair of dual-path marine-grade temperature control structures (2) are used for fuel temperature control and intake air temperature control respectively, promoting gas-liquid mixing to achieve stable temperature supply. At the same time, the dual-path marine-grade temperature control structure (2) can be connected in series with the engine cooling system. The heat energy absorbed by the engine after cooling by the cooling medium is utilized to achieve the preheating of the supplied fuel and gas, achieving the effects of energy saving, promoting uniform evaporation, improving combustion stability and reducing knocking. The marine detection and control unit (3) is used for gas intake and detection of the output temperature after gas-liquid mixing.

2. The marine methanol engine fuel supply device according to claim 1, characterized in that, The fuel storage and supply unit (1) includes a methanol storage tank (11) and an explosion-proof delivery pump set (12). The methanol storage tank (11) has an injection port (13) on its upper wall. The upper wall and the bottom of the front side wall of the methanol storage tank (11) are respectively connected to a return pipe (14) and an output pipe (15). The explosion-proof delivery pump group (12) is located on the right side of the methanol storage tank (11), and the extraction end of the explosion-proof delivery pump group (12) is connected to the output pipe (15).

3. A marine methanol engine fuel supply device according to claim 2, characterized in that, The dual-path marine-grade temperature control structure (2) includes a marine-grade heat exchange regulating component (21), a pair of marine-grade sealing fitting components (22), and an electric heating rod body (23). The marine-grade heat exchange regulating component (21) is located on the right side of the explosion-proof transfer pump group (12), and the marine-grade heat exchange regulating component (21) is connected to the output end of the explosion-proof transfer pump group (12). A pair of marine-grade sealing fitting components (22) are symmetrically arranged inside the marine-grade heat exchange regulating component (21), and the electric heating rod body (23) is fixedly installed on one of the marine-grade sealing fitting components (22).

4. A marine methanol engine fuel supply device according to claim 3, characterized in that, The marine-grade heat exchange regulating assembly (21) includes a support frame (211), a swing frame (212), a discharge pipe (213), a heat exchange inner cylinder (214), a heat exchange outer cylinder (215), two pairs of adapter pipes (216), an inlet cover (217), a swing rod (218), and a hydraulic cylinder body (219). One end of the support frame (211) is provided with an arc-shaped bayonet. One end of the swing frame (212) is fixedly mounted on the support frame (211), and the other end of the swing frame (212) is L-shaped. One end of the discharge pipe (213) is detachably clamped to the bayonet of the support frame (211), and the discharge pipe (213) is fixed by bolts. One end of the heat exchange inner cylinder (214) is fixedly fitted onto the top of the discharge pipe (213), and a rotating groove is provided on the circumference of the bottom side wall of the heat exchange inner cylinder (214). The heat exchange outer cylinder (215) is movably fitted onto the outside of the heat exchange inner cylinder (214), and the bottom of the heat exchange outer cylinder (215) is movably clamped onto the rotating groove. The heat exchange outer cylinder (215) can rotate, and a concave sealing groove is provided along the middle of the upper wall of the heat exchange outer cylinder (215). One end of each of the two pairs of connecting pipes (216) is symmetrically connected to the heat exchange... The outer cylinder (215) has left and right side walls that are staggered and symmetrical near the upper and lower ends respectively. The top adapter pipe (216) is used for input, and the bottom adapter pipe (216) is used for output. The input cover (217) is detachably screwed onto the top of the heat exchange inner cylinder (214), and the input cover (217) is movably fastened onto the heat exchange outer cylinder (215). The lower wall of the input cover (217) is provided with a protrusion that fits into the sealing groove. The middle part of the input cover (217) is provided with an input port that connects to the heat exchange inner cylinder (214). One end of the swing rod (218) is fixedly set at the bottom of the right side wall of the heat exchange outer cylinder (215). One end of the hydraulic cylinder body (219) is movably connected to the upper wall of the other end of the swing frame (212). The telescopic end of the hydraulic cylinder body (219) is inclinedly and movably connected to the lower wall of the other end of the swing rod (218).

5. A marine methanol engine fuel supply device according to claim 4, characterized in that, A pair of marine sealing fitting components (22) are respectively fixedly installed on the right side wall of the heat exchange inner cylinder (214) and the left side wall of the heat exchange outer cylinder (215), and the marine sealing fitting components (22) are located in the same direction and corresponding between the misaligned transfer pipes (216); The marine sealing fitting assembly (22) includes a sleeve (221), a fitting seat (222), a pair of telescopic rods (223), and a pair of springs (224). The sleeve (221) is fixedly installed on the inner left side wall of the heat exchange outer cylinder (215), and the other end of the sleeve (221) is movably attached to the outer left side wall of the heat exchange inner cylinder (214). The fitting seat (222) is movably embedded in the sleeve (221), and one end of the fitting seat (222) is attached to the outer wall of the heat exchange inner cylinder (214). One end of a pair of telescopic rods (223) is fixedly connected to the upper and lower side walls of the fitting seat (222), and the other end of the telescopic rods (223) movably penetrates the left side wall of the heat exchange outer cylinder (215). A pair of springs (224) are movably fitted in the middle of the telescopic rods (223), and the springs (224) are located in the sleeve (221).

6. A marine methanol engine fuel supply device according to claim 5, characterized in that, The marine detection and control unit (3) includes a venturi throat (31), a detection tube (32), and a temperature detector (33). The fuel input end of the Venturi throat (31) is connected to the discharge pipe (213) of one of the dual-path marine-grade temperature control structures (2) via a double-walled fuel delivery pipe (4). The gas input end of the Venturi throat (31) is connected to the discharge pipe (213) of another heat exchange structure. One end of the detection tube (32) is detachably connected to the output end of the Venturi throat (31), and the other end of the detection tube (32) can be connected to the internal combustion engine. The temperature detector (33) is detachably installed in the middle of the detection tube (32), and the temperature detector (33) can be located inside the detection tube (32).

7. A marine methanol engine fuel supply device according to claim 6, characterized in that, The input cover (217) of one of the dual-path marine-grade temperature control structures (2) is connected to the output end of the explosion-proof delivery pump set (12) via a pressure-resistant delivery pipe (5).

8. A marine methanol engine fuel supply device according to claim 7, characterized in that, The pair of dual-path marine-grade temperature control structures (2) connect the input and output adapters (216) in series through the waste heat medium input series pipe (6) and the waste heat medium output series pipe (7).

9. A marine methanol engine fuel supply device according to claim 7, characterized in that, The outer heat exchange cylinder (215) is driven by the extension of the hydraulic cylinder body (219) and can rotate on the inner heat exchange cylinder (214).

10. A marine methanol engine fuel supply device according to claim 7, characterized in that, The rotation of the heat exchange outer cylinder (215) can adjust the spacing of the marine sealing fitting assembly (22), thereby adjusting the size of the space on both sides of the marine sealing fitting assembly (22).

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