A dual-fuel supply device for marine engines with automatic switching function

Abstract

The present invention discloses a dual-fuel supply device for a marine engine with an automatic switching function, and belongs to the technical field of marine equipment. The present invention comprises a guide rail base, a counterweight platform, and a loading platform, wherein the guide rail base is connected to a hull, the counterweight platform is mounted on the guide rail base, a pair of support arms are arranged on the counterweight platform, a mandrel is arranged between the two support arms, two transfer beams are symmetrically arranged at the bottom of the loading platform, the loading platform is transferred to the mandrel through the transfer beams, a switching mechanism is installed on the top of the loading platform, one end of the switching mechanism is connected to the fuel through a pipeline, and the other end of the switching mechanism is connected to the engine through a pipeline, a balancing mechanism is installed at the bottom of the loading platform, and the balancing mechanism keeps the loading platform stable, when the ship is docked at the shore or sailing in calm seas, the electromagnet overcomes the elastic force of the spring and is adsorbed on the iron core, thereby driving the push rod to be pushed out and pushed onto the hull to fix the loading platform.

Description

Technical Field

[0001] The invention relates to the technical field of marine equipment, in particular to a dual-fuel supply device for a marine engine with an automatic switching function. Background Art

[0002] Marine dual-fuel engines are usually designed to be able to switch between two different types of fuel. The use of dual-fuel engines helps to reduce carbon emissions of ships, reduce costs, increase fuel flexibility, and enable ships to comply with more stringent environmental regulations. The two fuels generally include traditional liquid fuels (such as diesel) and clean energy such as liquefied natural gas (LNG). Dual-fuel engines have a switching supply system, which is usually automatic. The system can detect the fuel type and adjust the fuel supply accordingly. Since the hull has unconstrained freedom in six directions when it is sailing on the sea, the hull will shake under the influence of wind and waves. The main shaking comes from the shaking from the bow to the stern and the shaking between the two sides of the ship, which causes the fuel pump and gas pump to operate unstable, so that the fuel or gas supply entering the engine is also unstable, causing vibrations in the engine operation and unstable output power, which reduces the service life and maintenance cycle of the engine. Summary of the invention

[0003] The object of the present invention is to provide a dual-fuel supply device for a marine engine with an automatic switching function to solve the problems raised in the above-mentioned background technology.

[0004] In order to solve the above technical problems, the present invention provides the following technical solutions: A dual-fuel supply device for a marine engine with an automatic switching function comprises a fuel tank, a gas storage tank, a guide rail base, a counterweight platform, and a loading platform, wherein the guide rail base is connected to the hull, the counterweight platform is installed on the guide rail base, a pair of support arms are arranged on the counterweight platform, a core shaft is arranged between the two support arms, two transfer beams are symmetrically arranged at the bottom of the loading platform, the loading platform is transferred to the core shaft through the transfer beams, a switching mechanism is installed on the top of the loading platform, one end of the switching mechanism is connected to the fuel tank and the gas storage tank through a pipeline, and the other end of the switching mechanism is connected to the engine through a pipeline, and a balancing mechanism is installed at the bottom of the loading platform, and the balancing mechanism keeps the loading platform stable.

[0005] Furthermore, a plurality of rollers are arranged inside the guide rail base, and the rollers are evenly distributed in an arc shape. The counterweight platform is semi-cylindrical, and the cylindrical surface of the counterweight platform is in contact with the plurality of rollers. The cylindrical surface of the counterweight platform is heavier than the axial section. When the hull is sailing on the sea, the degrees of freedom in six directions are unconstrained. Therefore, the hull will shake under the influence of wind and waves. When the bow shakes from the stern to the stern, the heaviest part of the counterweight platform is concentrated near the position in contact with the guide rail base. Therefore, when the hull drives the guide rail base to shake, the counterweight platform rolls and adjusts along the rollers on the guide rail base, so that the counterweight platform and the mechanism installed on the loading platform are affected as little as possible by the shaking from the bow to the stern, thereby maintaining the stability of the dual-fuel supply device.

[0006] Furthermore, at least one pair of support components is provided on the loading platform, and each pair of the support components is symmetrically arranged on both sides of the loading platform, and each support component includes an iron core, a push rod, and an electromagnet. The push rod is slidably installed in the iron core, and the electromagnet is installed at the end of the push rod away from the iron core. The electromagnet is connected to the main control system through a circuit, and a spring is arranged between the electromagnet and the iron core. The spring outer sleeve is provided with a dust cover. When the ship is docked at the shore or sailing in calm waters, the balancing mechanism does not need to work. The control system energizes the electromagnet to generate electromagnetic force. The electromagnet overcomes the elastic force of the spring and is adsorbed on the iron core, thereby driving the push rod to be pushed out and pushed onto the hull to fix the loading platform and prevent the dual-fuel supply device from swinging randomly. When the balancing mechanism needs to be used, the electromagnet is powered off, the push rod is retracted under the action of the spring, and the loading platform is disengaged from the hull.

[0007] Furthermore, the switching mechanism includes a fuel pump, a gas pump, and a two-position three-way reversing valve. An access pipe is connected between the suction end of the fuel pump and the fuel tank, and the suction end of the gas pump and the gas storage tank are also connected through an access pipe. The compression ends of the fuel pump and the gas pump are connected to the two-position three-way reversing valve through pipes. An output pipe is connected between the two-position three-way reversing valve and the engine. The fuel pump and the gas pump respectively deliver fuel and gas to the engine. The two-position three-way reversing valve switches the pipelines connecting the fuel pump and the gas pump to the engine.

[0008] Furthermore, the switching mechanism also includes a screw and a mounting plate, both ends of the screw are provided with a section of hollow shaft rod, and the ends of the two sections of the hollow shaft rod away from the screw are provided with blocks, one of the blocks is connected to the valve core of the two-position three-way reversing valve, and a nut is threadedly connected to the screw, and the nut is rotatably arranged inside the mounting plate. The two-position three-way reversing valve can be adjusted in two ways: automatic and manual. In the manual adjustment state, the servo motor is powered off, and the servo motor has no self-locking performance and has no effect on manual operation. The operator rotates the handwheel, and the handwheel drives a linkage gear to rotate. The linkage gear drives the nut to rotate through the tooth groove. The rotation of the nut causes the screw to move axially, pulling the valve core of the two-position three-way reversing valve to move, thereby switching the fuel pipeline through the two-position three-way reversing valve. In the automatic switching state, the servo motor is powered on to drive a linkage gear to rotate, and the valve core position of the two-position three-way reversing valve is adjusted in the same way to switch the fuel pipeline, satisfying the automatic switching and manual switching supply modes.

[0009] Furthermore, an elastic guide piece is provided at both end ports of the spiral line of the internal thread of the nut, a tooth groove is opened on the outer contour of the nut, and two interlocking gears are rotatably provided in the mounting plate, and the two interlocking gears are meshed with the tooth grooves, one end of the interlocking gear is coaxially connected to a handwheel, and one end of the other interlocking gear is coaxially connected to a servo motor. When the nut moves the screw to the end of the stroke, the nut idles on the empty shaft rod, and the screw no longer produces axial displacement. Due to the setting of a block, the nut cannot be separated from the screw. When the nut idles on the empty shaft rod, the interlocking gear is reversed, and the elastic guide piece will guide the spiral groove on the nut into the spiral groove on the screw again, so that the nut meshes with the screw thread again, driving the screw to move axially. Through the setting of the empty shaft rod and the elastic guide piece, the nut and the screw are effectively prevented from being stuck, and the thread is prevented from being damaged and loosened due to long-term rotation impact, thereby protecting the thread, preventing thread failure, and extending the service life.

[0010] Furthermore, the balancing mechanism includes a spirit level, a first cylinder, a second cylinder, a double-sided rack, a pair of flywheel assemblies, and a pneumatic system. The spirit level, the first cylinder and the second cylinder are connected through the pneumatic system. The first cylinder and the second cylinder are respectively installed under two transfer beams. A piston rod is arranged in the first cylinder and the second cylinder. The double-sided rack is arranged between the two piston rods. No matter how the hull tilts, the oil level in the spirit level is always in a horizontal state, and the floating block floats on the oil surface. The two floating blocks make the parallel four-bar module remain stable when the hull sways, that is, the valve body of the air distribution valve has the same posture as the loading platform, and the valve core of the air distribution valve remains stationary with the parallel four-bar module, the valve core does not move, and the valve body moves. The air distribution valve distributes the air input from the air inlet pipe of the pneumatic system to the first air outlet pipe and the second air outlet pipe respectively, so that the first cylinder or the second cylinder is inhaled, and the double-sided rack is pushed to move between the first cylinder and the second cylinder.

[0011] Furthermore, the flywheel assembly includes a flywheel outer shell, an inertia flywheel, an arc-shaped rack, and a main motor. The flywheel outer shell is rotatably installed at the bottom of the loading platform, the inertia flywheel is rotatably installed in the flywheel outer shell, the main motor is coaxially connected to the inertia flywheel, the arc-shaped rack is fixedly installed on the flywheel outer shell, the center of the arc-shaped rack is on the same vertical line as the center of the flywheel outer shell and the loading platform transition point, the arc-shaped rack is meshed with the double-sided rack, and the two flywheel assemblies are symmetrically arranged on both sides of the double-sided rack. The inertia flywheel rotates rapidly driven by the main motor, and the two inertia flywheels rotate in opposite directions. When the hull tilts to one side, the gas valve inputs gas into one cylinder to push the double-sided rack to move. While the double-sided rack moves, the arc-shaped racks on both sides are driven to move through the meshing between the teeth. The arc-shaped rack drives the flywheel outer shell to rotate a certain angle, changes the vector direction of the moment of inertia generated by the inertia flywheel, and adjusts the loading platform to balance.

[0012] Furthermore, a parallelogram module is rotatably arranged in the spirit level, and a floating block is connected to each of the two ends of the parallelogram module. The spirit level is filled with oil, and the floating block is in contact with the oil. A gas distribution valve is arranged outside the spirit level, and a valve core of the gas distribution valve is connected to the parallelogram module. The pneumatic system includes an air inlet pipe, a first air outlet pipe, and a second air outlet pipe, and the air inlet pipe, the first air outlet pipe, and the second air outlet pipe are all connected to the gas distribution valve. After the loading platform reaches a balanced state, the gas distribution valve blocks the first air outlet pipe and the second air outlet pipe, and the first cylinder and the second cylinder cannot take in air. The air pressure in the first cylinder and the second cylinder is balanced by the unloading hole assembly to ensure that the loading platform maintains a balanced state. No matter how the hull tilts and sways, the balancing mechanism stabilizes the loading platform, ensuring that the fuel pump and the gas pump operate stably, and the fuel or gas supply entering the engine is stable, thereby reducing the vibration of the engine, avoiding unstable output power, and extending the service life and maintenance cycle of the engine.

[0013] Furthermore, the first air outlet pipe is connected to the first cylinder, the second air outlet pipe is connected to the second cylinder, and the first cylinder and the second cylinder are both provided with unloading holes.

[0014] Compared with the prior art, the beneficial effects achieved by the present invention are: 1. The two-position three-way reversing valve can be adjusted in two ways, automatic and manual, to meet the switching of supply modes. Through the setting of the hollow shaft rod and the elastic guide, the nut moves the screw to the end of the stroke and continues to idle on the hollow shaft rod, effectively preventing the nut and the screw from getting stuck, preventing the thread from being damaged and loosened due to long-term rotation impact, protecting the thread, preventing thread failure, and extending the service life.

[0015] 2. By setting a level and a balancing mechanism, the two inertia flywheels rotate in opposite directions driven by the main motor, the valve core of the distribution valve does not move and the valve body moves. The distribution valve distributes the air input from the air intake pipe of the pneumatic system to the first air outlet pipe and the second air outlet pipe respectively, pushing the double-sided rack to move, and driving the flywheel outer shell to rotate a certain angle through the arc rack, changing the vector direction of the moment of inertia, adjusting the loading platform to balance, ensuring the stable operation of the fuel pump and the gas pump, and the stable supply of fuel or gas entering the engine, reducing the vibration of the engine, avoiding unstable output power, and extending the service life and maintenance cycle of the engine. BRIEF DESCRIPTION OF THE DRAWINGS

[0016] The accompanying drawings are used to provide a further understanding of the present invention and constitute a part of the specification. Together with the embodiments of the present invention, they are used to explain the present invention and do not constitute a limitation of the present invention. In the accompanying drawings: Figure 1 It is a schematic diagram of the overall appearance structure of the present invention; Figure 2 It is a schematic diagram of the overall appearance structure of the present invention; Figure 3 It is a partial structural schematic diagram of the present invention; Figure 4 It is a structural schematic diagram of the bottom of the loading platform of the present invention; Figure 5 It is a schematic diagram of the structure above the loading platform of the present invention; Figure 6 It is a structural schematic diagram of the mounting plate part of the present invention; Figure 7 It is a structural schematic diagram of the nut part of the present invention; Figure 8 It is a structural schematic diagram of the level instrument of the present invention; Fig. 9 It is a structural schematic diagram of the level instrument of the present invention; In the figure: 1, guide rail base; 2, roller; 3, counterweight platform; 4, support arm; 5, spindle; 6, transfer beam; 7, loading platform; 801, fuel pump; 802, gas pump; 9, two-position three-way reversing valve; 101, inlet pipe; 102, outlet pipe; 11, stopper; 12, hollow shaft rod; 13, screw rod; 14, mounting plate; 15, nut; 16, elastic guide; 17, linkage gear; 18, hand wheel; 19, servo motor ; 20. Iron core; 21. Push rod; 22. Dust cover; 23. Electromagnet; 241. First cylinder; 242. Second cylinder; 25. Piston rod; 26. Double-sided rack; 27. Flywheel outer shell; 28. Inertia flywheel; 29. ​​Arc rack; 30. Main motor; 31. Level; 32. Float; 33. Parallel four-bar module; 34. Gas distribution valve; 351. First outlet pipe; 352. Second outlet pipe; 36. Inlet pipe. DETAILED DESCRIPTION

[0017] The following will be combined with the drawings in the embodiments of the present invention to clearly and completely describe the technical solutions in the embodiments of the present invention. Obviously, the described embodiments are only part of the embodiments of the present invention, not all of the embodiments. Based on the embodiments of the present invention, all other embodiments obtained by ordinary technicians in this field without creative work are within the scope of protection of the present invention.

[0018] See also Figure 1-Figure 9The present invention provides a technical solution: a dual-fuel supply device for a marine engine with an automatic switching function comprises a fuel tank, a gas storage tank, a guide rail base 1, a counterweight platform 3, and a loading platform 7. The guide rail base 1 is connected to the hull, the counterweight platform 3 is installed on the guide rail base 1, a pair of support arms 4 are arranged on the counterweight platform 3, a spindle 5 is arranged between the two support arms 4, two transfer beams 6 are symmetrically arranged at the bottom of the loading platform 7, the loading platform 7 is transferred to the spindle 5 through the transfer beams 6, a switching mechanism is installed on the top of the loading platform 7, one end of the switching mechanism is connected to the fuel tank and the gas storage tank through a pipeline, and the other end of the switching mechanism is connected to the engine through a pipeline, a balancing mechanism is installed at the bottom of the loading platform 7, and the balancing mechanism keeps the loading platform 7 stable, the guide rail A plurality of rollers 2 are arranged inside the base 1, and the plurality of rollers 2 are evenly distributed in an arc shape. The counterweight platform 3 is semi-cylindrical, and the cylindrical surface of the counterweight platform 3 is in contact with the plurality of rollers 2. The cylindrical surface of the counterweight platform 3 is heavier than the axial section. When the hull is sailing on the sea, the degrees of freedom in six directions are unconstrained. Therefore, the hull will shake under the influence of wind and waves. When the bow shakes toward the stern, the heaviest part of the counterweight platform 3 is concentrated near the position in contact with the guide rail base 1. Therefore, when the hull drives the guide rail base 1 to shake, the counterweight platform 3 rolls and adjusts along the rollers 2 on the guide rail base 1, so that the counterweight platform 3 and the mechanism installed on the loading platform 7 are affected as little as possible by the shaking from the bow to the stern, thereby maintaining the stability of the dual-fuel supply device.

[0019] Two pairs of support components are arranged on the loading platform 7, and each pair of support components is symmetrically arranged on both sides of the loading platform 7. Each support component includes an iron core 20, a push rod 21, and an electromagnet 23. The push rod 21 is slidably installed in the iron core 20, and the electromagnet 23 is installed at the end of the push rod 21 away from the iron core 20. The electromagnet 23 is connected to the main control system through a circuit. A spring is arranged between the electromagnet 23 and the iron core 20, and a dust cover 22 is arranged on the spring outer cover. When the ship is docked at the shore or sailing in calm waters, the balancing mechanism does not need to work. The control system energizes the electromagnet 23 to generate electromagnetic force. The electromagnet 23 overcomes the elastic force of the spring and is adsorbed on the iron core 20, thereby driving the push rod 21 to be pushed out and pushed onto the hull, fixing the loading platform 7 to prevent the dual-fuel supply device from swinging randomly. When the balancing mechanism needs to be used, the electromagnet 23 is powered off, the push rod 21 is retracted under the action of the spring, and the loading platform 7 is disconnected from the hull.

[0020] The switching mechanism includes a fuel pump 801, a gas pump 802, and a two-position three-way reversing valve 9. An access pipe 101 is connected between the suction end of the fuel pump 801 and the fuel tank, and the suction end of the gas pump 802 is also connected to the gas storage tank through the access pipe 101. The compression ends of the fuel pump 801 and the gas pump 802 are connected to the two-position three-way reversing valve 9 through pipelines, and an output pipe 102 is connected between the two-position three-way reversing valve 9 and the engine. The switching mechanism also includes a screw rod 13 and a mounting plate 14. Both ends of the screw rod 13 are provided with a section of hollow shaft rod 12. The ends of the two sections of hollow shaft rod 12 away from the screw rod 13 are provided with a stopper 11. One stopper 11 is connected to the valve core of the two-position three-way reversing valve 9. A nut 15 is threadedly connected to the screw rod 13, and the nut 15 is rotatably arranged inside the mounting plate 14. The fuel pump 801 and the gas pump 802 respectively deliver fuel and gas into the engine The engine, the two-position three-way reversing valve 9 switches the pipelines connecting the fuel pump 801 and the gas pump 802 with the engine. The two-position three-way reversing valve 9 can be adjusted in two ways, automatically and manually. In the manual adjustment state, the servo motor 19 is powered off. The servo motor 19 has no self-locking performance and has no effect on manual operation. The operator turns the hand wheel 18, and the hand wheel 18 drives a linkage gear 17 to rotate. The linkage gear 17 drives the nut 15 to rotate through the tooth groove. The rotation of the nut 15 causes the screw 13 to move axially, pulling the valve core of the two-position three-way reversing valve 9 to move, thereby switching the fuel pipeline through the two-position three-way reversing valve 9. In the automatic switching state, the servo motor 19 is powered on to drive a linkage gear 17 to rotate. The valve core position of the two-position three-way reversing valve 9 is adjusted in the same way to switch the fuel pipeline, satisfying the automatic switching and manual switching supply modes.

[0021] An elastic guide piece 16 is provided at both ends of the spiral line of the internal thread of the nut 15. A tooth groove is provided on the outer contour of the nut 15. Two linkage gears 17 are rotatably provided in the mounting plate 14. The two linkage gears 17 are meshed with the tooth grooves. One end of one linkage gear 17 is coaxially connected to a hand wheel 18, and one end of the other linkage gear 17 is coaxially connected to a servo motor 19. When the nut 15 moves the screw rod 13 to the end of the stroke, the nut 15 idles on the empty shaft rod 12, and the screw rod 13 no longer generates axial displacement. Due to the setting of the stopper 11 The nut 15 cannot be separated from the screw rod 13. When the nut 15 is idling on the hollow shaft rod 12, the linkage gear 17 is reversed, and the elastic guide piece 16 will guide the spiral groove on the nut 15 into the spiral groove on the screw rod 13 again, so that the nut 15 is meshed with the screw rod 13 thread again, driving the screw rod 13 to move axially. The arrangement of the hollow shaft rod 12 and the elastic guide piece 16 can effectively prevent the nut 15 and the screw rod 13 from being stuck, and prevent the thread from being damaged and loosened due to long-term rotation impact, thereby protecting the thread, preventing thread failure, and extending the service life.

[0022] The balancing mechanism includes a level 31, a first cylinder 241, a second cylinder 242, a double-sided rack 26, a pair of flywheel assemblies, and a pneumatic system. The level 31, the first cylinder 241, and the second cylinder 242 are connected through the pneumatic system. The first cylinder 241 and the second cylinder 242 are respectively installed under the two transfer beams 6. A piston rod 25 is provided in each of the first cylinder 241 and the second cylinder 242. The double-sided rack 26 is provided between the two piston rods 25. No matter how the hull tilts, the oil level in the level 31 is always in a horizontal state, and the floating block 3 2 floats on the oil surface, and the two floating blocks 32 make the parallelogram module 33 stable when the hull is swaying, that is, the valve body of the air distribution valve 34 has the same posture as the loading platform 7, and the valve core of the air distribution valve 34 and the parallelogram module 33 remain stationary, the valve core does not move, and the valve body moves. The air distribution valve 34 distributes the air input from the air intake pipe 36 of the pneumatic system to the first air outlet pipe 351 and the second air outlet pipe 352 respectively, so that the first cylinder 241 or the second cylinder 242 is inhaled, and the double-sided rack 26 is pushed to move between the first cylinder 241 and the second cylinder 242.

[0023] The flywheel assembly includes a flywheel outer shell 27, an inertia flywheel 28, an arc-shaped rack 29, and a main motor 30. The flywheel outer shell 27 is rotatably mounted at the bottom of the loading platform 7, the inertia flywheel 28 is rotatably mounted inside the flywheel outer shell 27, the main motor 30 is coaxially connected to the inertia flywheel 28, the arc-shaped rack 29 is fixedly mounted on the flywheel outer shell 27, the center of the arc-shaped rack 29 is on the same vertical line as the center of the flywheel outer shell 27 and the loading platform 7 transition point, the arc-shaped rack 29 is meshed with the double-sided rack 26, the two flywheel assemblies are symmetrically arranged on both sides of the double-sided rack 26, a parallel four-bar module 33 is rotatably arranged inside the level 31, A float 32 is connected to each end of the parallelogram module 33, the level 31 is filled with oil, and the float 32 is in contact with the oil. An air distribution valve 34 is arranged outside the level 31, and the valve core of the air distribution valve 34 is connected to the parallelogram module 33. The pneumatic system includes an air inlet pipe 36, a first air outlet pipe 351, and a second air outlet pipe 352. The air inlet pipe 36, the first air outlet pipe 351, and the second air outlet pipe 352 are all connected to the air distribution valve 34, the first air outlet pipe 351 is connected to the first cylinder 241, and the second air outlet pipe 352 is connected to the second cylinder 242. Unloading holes are provided on the first cylinder 241 and the second cylinder 242.

[0024] The inertia flywheel 28 rotates rapidly under the drive of the main motor 30. The two inertia flywheels 28 rotate in opposite directions. When the hull tilts to one side, the gas distribution valve 34 inputs gas into one cylinder to push the double-sided rack 26 to move. While the double-sided rack 26 moves, the meshing between the teeth drives the arc-shaped racks 29 on both sides to move. The arc-shaped racks 29 drive the flywheel outer shell 27 to rotate a certain angle, changing the vector direction of the moment of inertia generated by the inertia flywheel 28, and adjusting the loading platform 7 to balance. After the loading platform 7 reaches a balanced state, the gas distribution valve 34 will The first air outlet pipe 351 and the second air outlet pipe 352 are both blocked, and the first cylinder 241 and the second cylinder 242 cannot take in air. The air pressure in the first cylinder 241 and the second cylinder 242 is balanced by the unloading hole assembly to ensure that the loading platform 7 remains in a balanced state. No matter how the hull tilts and sways, the balancing mechanism stabilizes the loading platform 7, ensuring the stable operation of the fuel pump 801 and the gas pump 802, and the stable supply of fuel or gas entering the engine, thereby reducing the vibration of the engine, avoiding unstable output power, and extending the service life and maintenance cycle of the engine.

[0025] The working principle of the present invention is as follows: when the hull is sailing on the sea, the degrees of freedom in six directions are unconstrained, so the hull will shake under the influence of wind and waves. When the bow shakes in the direction from the stern to the stern, the heaviest part of the counterweight platform 3 is concentrated near the position in contact with the guide rail base 1. Therefore, when the hull drives the guide rail base 1 to shake, the counterweight platform 3 is rolled and adjusted along the roller 2 on the guide rail base 1, so that the counterweight platform 3 and the mechanism installed on the loading platform 7 are affected as little as possible by the shaking in the direction from the bow to the stern, thereby maintaining the stability of the dual-fuel supply device. When the ship is docked or sailing in calm waters, the balancing mechanism does not need to work. The control system enables the electromagnet 23 to be energized to generate electromagnetic force. The electromagnet 23 overcomes the elastic force of the spring and is adsorbed on the iron core 20, thereby driving the push rod 21 to be pushed out and pushed onto the hull, fixing the loading platform 7, and preventing the dual-fuel supply device from swinging randomly. When the balancing mechanism needs to be used, the electromagnet 23 is powered off, the push rod 21 is retracted under the action of the spring, and the loading platform 7 is disconnected from the hull.

[0026] The fuel pump 801 and the gas pump 802 deliver the fuel and the gas to the engine respectively, and the two-position three-way reversing valve 9 switches the pipelines connecting the fuel pump 801 and the gas pump 802 with the engine. The two-position three-way reversing valve 9 can be adjusted in two ways, automatically and manually. In the state of manual adjustment, the servo motor 19 is powered off. The servo motor 19 has no self-locking performance and has no effect on manual operation. The operator rotates the hand wheel 18, and the hand wheel 18 drives a linkage gear 17 to rotate. The linkage gear 17 drives the nut 15 to rotate through the tooth groove. The rotation of the nut 15 causes the screw 13 to move axially, pulling the valve core of the two-position three-way reversing valve 9 to move, thereby switching the fuel pipeline through the two-position three-way reversing valve 9. In the state of automatic switching, the servo motor 19 is powered on to drive a linkage gear 17 to rotate. The valve core position of the two-position three-way reversing valve 9 is adjusted in the same way to switch the fuel pipeline, satisfying the automatic switching and manual switching supply modes.

[0027] When the nut 15 moves the screw rod 13 to the end of the stroke, the nut 15 idles on the hollow shaft rod 12, and the screw rod 13 no longer generates axial displacement. Due to the setting of the stopper 11, the nut 15 cannot be separated from the screw rod 13. When the nut 15 idles on the hollow shaft rod 12, the linkage gear 17 is reversed, and the elastic guide piece 16 will again guide the spiral groove on the nut 15 into the spiral groove on the screw rod 13, so that the nut 15 is meshed with the screw rod 13 thread again, driving the screw rod 13 to move axially. Through the setting of the hollow shaft rod 12 and the elastic guide piece 16, the nut 15 and the screw rod 13 are effectively prevented from being stuck and stuck, and the thread is prevented from being damaged and loosened due to long-term rotation impact, thereby protecting the thread, preventing thread failure, and extending the service life.

[0028] No matter how the hull tilts, the oil level in the spirit level 31 is always in a horizontal state, and the floats 32 float on the oil surface. The two floats 32 keep the parallelogram module 33 stable when the hull sways, that is, the valve body of the air distribution valve 34 has the same posture as the loading platform 7, and the valve core of the air distribution valve 34 remains stationary with the parallelogram module 33, the valve core does not move, and the valve body moves. The air distribution valve 34 distributes the air input from the air inlet pipe 36 of the pneumatic system to the first air outlet pipe 351 and the second air outlet pipe 352 respectively, thereby allowing the first cylinder 241 or the second cylinder 242 to take in air, pushing the double-sided rack 26 to move between the first cylinder 241 and the second cylinder 242.

[0029] The inertia flywheel 28 rotates rapidly under the drive of the main motor 30. The two inertia flywheels 28 rotate in opposite directions. When the hull tilts to one side, the gas distribution valve 34 inputs gas into one cylinder to push the double-sided rack 26 to move. While the double-sided rack 26 moves, the meshing between the teeth drives the arc-shaped racks 29 on both sides to move. The arc-shaped racks 29 drive the flywheel outer shell 27 to rotate a certain angle, changing the vector direction of the moment of inertia generated by the inertia flywheel 28, and adjusting the loading platform 7 to balance. After the loading platform 7 reaches a balanced state, the gas distribution valve 34 will The first air outlet pipe 351 and the second air outlet pipe 352 are both blocked, and the first cylinder 241 and the second cylinder 242 cannot take in air. The air pressure in the first cylinder 241 and the second cylinder 242 is balanced by the unloading hole assembly to ensure that the loading platform 7 remains in a balanced state. No matter how the hull tilts and sways, the balancing mechanism stabilizes the loading platform 7, ensuring the stable operation of the fuel pump 801 and the gas pump 802, and the stable supply of fuel or gas entering the engine, thereby reducing the vibration of the engine, avoiding unstable output power, and extending the service life and maintenance cycle of the engine.

[0030] It should be noted that, in this article, relational terms such as first and second, etc. are only used to distinguish one entity or operation from another entity or operation, and do not necessarily require or imply any such actual relationship or order between these entities or operations. Moreover, the terms "include", "comprise" or any other variants thereof are intended to cover non-exclusive inclusion, so that a process, method, article or device including a series of elements includes not only those elements, but also other elements not explicitly listed, or also includes elements inherent to such process, method, article or device.

[0031] Finally, it should be noted that the above description is only a preferred embodiment of the present invention and is not intended to limit the present invention. Although the present invention has been described in detail with reference to the aforementioned embodiments, those skilled in the art can still modify the technical solutions described in the aforementioned embodiments or replace some of the technical features therein by equivalents. Any modification, equivalent replacement, improvement, etc. made within the spirit and principle of the present invention shall be included in the protection scope of the present invention.

Claims

1. A dual-fuel supply device for a marine engine with an automatic switching function, comprising a fuel tank and a gas storage tank, characterized in that: The invention comprises a guide rail base (1), a counterweight platform (3), and a loading platform (7), wherein the guide rail base (1) is connected to a ship body, the counterweight platform (3) is mounted on the guide rail base (1), a pair of support arms (4) are arranged on the counterweight platform (3), a spindle (5) is arranged between the two support arms (4), two transfer beams (6) are symmetrically arranged at the bottom of the loading platform (7), the loading platform (7) is transferred to the spindle (5) via the transfer beams (6), a switching mechanism is mounted on the top of the loading platform (7), one end of the switching mechanism is connected to a fuel tank and a gas storage tank via a pipeline, and the other end of the switching mechanism is connected to an engine via a pipeline, and a balancing mechanism is mounted on the bottom of the loading platform (7), the balancing mechanism enables the loading platform (7) to remain stable.

2. A dual-fuel supply device for a marine engine with an automatic switching function according to claim 1, characterized in that: A plurality of rollers (2) are arranged inside the guide rail base (1), and the plurality of rollers (2) are evenly distributed in an arc shape. The counterweight platform (3) is semi-cylindrical, and the cylindrical surface of the counterweight platform (3) is in contact with the plurality of rollers (2). The cylindrical surface of the counterweight platform (3) is heavier than the axial section.

3. A dual-fuel supply device for a marine engine with an automatic switching function according to claim 1, characterized in that: At least one pair of support components is arranged on the loading platform (7), each pair of support components is symmetrically arranged on both sides of the loading platform (7), each support component comprises an iron core (20), a push rod (21), and an electromagnet (23), the push rod (21) is slidably installed in the iron core (20), the electromagnet (23) is installed at one end of the push rod (21) away from the iron core (20), the electromagnet (23) is connected to the main control system through a circuit, a spring is arranged between the electromagnet (23) and the iron core (20), and the spring outer shell is provided with a dust cover (22).

4. A dual-fuel supply device for a marine engine with an automatic switching function according to claim 1, characterized in that: The switching mechanism comprises a fuel pump (801), a gas pump (802), and a two-position three-way reversing valve (9); an inlet pipe (101) is connected between the suction end of the fuel pump (801) and the fuel tank; the suction end of the gas pump (802) and the gas storage tank are also connected via the inlet pipe (101); the compression ends of the fuel pump (801) and the gas pump (802) are both connected to the two-position three-way reversing valve (9) via pipes; and an output pipe (102) is connected between the two-position three-way reversing valve (9) and the engine.

5. A dual-fuel supply device for a marine engine with an automatic switching function according to claim 4, characterized in that: The switching mechanism further comprises a screw rod (13) and a mounting plate (14). A hollow shaft rod (12) is provided at both ends of the screw rod (13). A stopper (11) is provided at one end of the two hollow shaft rods (12) away from the screw rod (13). One of the stoppers (11) is connected to a valve core of a two-position three-way reversing valve (9). A nut (15) is threadedly connected to the screw rod (13). The nut (15) is rotatably arranged inside the mounting plate (14).

6. A dual-fuel supply device for a marine engine with an automatic switching function according to claim 5, characterized in that: An elastic guide piece (16) is provided at both ends of the spiral line of the internal thread of the nut (15), and a tooth groove is provided on the outer contour of the nut (15). Two linkage gears (17) are rotatably provided in the mounting plate (14), and the two linkage gears (17) are both meshed with the tooth grooves. One end of one linkage gear (17) is coaxially connected to a hand wheel (18), and one end of the other linkage gear (17) is coaxially connected to a servo motor (19).

7. A dual-fuel supply device for a marine engine with an automatic switching function according to claim 1, characterized in that: The balancing mechanism comprises a level (31), a first cylinder (241), a second cylinder (242), a double-sided rack (26), a pair of flywheel assemblies, and a pneumatic system. The level (31), the first cylinder (241), and the second cylinder (242) are connected via the pneumatic system. The first cylinder (241) and the second cylinder (242) are respectively installed below two transfer beams (6). A piston rod (25) is provided in each of the first cylinder (241) and the second cylinder (242). The double-sided rack (26) is provided between the two piston rods (25).

8. A dual-fuel supply device for a marine engine with an automatic switching function according to claim 7, characterized in that: The flywheel assembly comprises a flywheel outer shell (27), an inertia flywheel (28), an arc-shaped rack (29), and a main motor (30). The flywheel outer shell (27) is rotatably mounted on the bottom of the loading platform (7), the inertia flywheel (28) is rotatably mounted inside the flywheel outer shell (27), the main motor (30) is coaxially connected to the inertia flywheel (28), the arc-shaped rack (29) is fixedly mounted on the flywheel outer shell (27), the center of the arc-shaped rack (29) and the center of the transition point between the flywheel outer shell (27) and the loading platform (7) are on the same vertical line, the arc-shaped rack (29) is meshed with the double-sided rack (26), and two flywheel assemblies are symmetrically arranged on both sides of the double-sided rack (26).

9. A dual-fuel supply device for a marine engine with an automatic switching function according to claim 7, characterized in that: A parallelogram module (33) is rotatably arranged inside the level (31), and two ends of the parallelogram module (33) are respectively connected to a floating block (32). The level (31) is filled with oil, and the floating block (32) is in contact with the oil. An air distribution valve (34) is arranged outside the level (31), and a valve core of the air distribution valve (34) is connected to the parallelogram module (33). The pneumatic system comprises an air inlet pipe (36), a first air outlet pipe (351), and a second air outlet pipe (352), and the air inlet pipe (36), the first air outlet pipe (351), and the second air outlet pipe (352) are all connected to the air distribution valve (34).

10. A dual-fuel supply device for a marine engine with an automatic switching function according to claim 9, characterized in that: The first air outlet pipe (351) is connected to the first cylinder (241), the second air outlet pipe (352) is connected to the second cylinder (242), and both the first cylinder (241) and the second cylinder (242) are provided with unloading holes.

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