An automatic power conversion device for improving energy efficiency of LNG dredgers

Abstract

The present invention discloses an automatic power conversion device for improving the energy saving of LNG dredgers, including a protective shell, a movable plate slidably connected inside the protective shell, an upper surface of the movable plate fixedly connected to an LNG fuel engine device and a gasoline engine device, a side surface of the LNG fuel engine device fixedly connected to a pressure gauge, a pointer rotatably connected inside the pressure gauge, the other end of the pointer fixedly connected to a turntable, a circumferential surface of the turntable rotatably connected to a connecting rod, a side surface of the LNG fuel engine device slidably connected to a connecting rod, and one end of the connecting rod and the other end of the connecting rod are rotatably connected, and a first conductive sheet is fixedly connected to the surface of the connecting rod. In the present invention, a switch is driven to rotate by mechanical transmission, and the switch is used to automatically switch power fuel for use. There is no need to use electronic intelligent devices for control, so there is no need to use electricity for the control device, thereby improving the energy saving effect.

Description

Technical Field

[0001] The present invention relates to the technical field of dredgers, and in particular to an automatic power conversion device for improving the energy-saving performance of LNG dredgers. Background Art

[0002] As a sustainable clean energy source, LNG has obvious environmental and social benefits. Replacing fuel with LNG can reduce sulfur dioxide emissions by 90% and nitrogen oxide emissions by 80%. The environmental benefits are very obvious. It is a high-quality alternative fuel for automobiles. It can be foreseen that cities will gradually replace fuel with LNG or natural gas in automobile fuel.

[0003] When the current dredger is in use, when the LNG fuel is used up and the LNG fuel cannot be replenished in time, it is necessary to promptly replace it with other energy sources to power the dredger so that the dredger can continue to work normally. However, after the LNG fuel is used up, the existing dredger requires a variety of intelligent devices to complete automatic power conversion. Since the working environment of the dredger is relatively harsh, it is easy to cause the service life of the intelligent devices to decrease, so it is very inconvenient for users to repair it, which makes the dredger unable to be used normally, and it is also necessary to share electricity with the intelligent electronic devices, resulting in a very energy-consuming problem. Summary of the Invention

[0004] In order to overcome the above technical problems, the purpose of the present invention is to provide a power automatic conversion device for improving the energy saving of LNG dredgers to solve the above problems.

[0005] The purpose of the present invention can be achieved through the following technical solutions:

[0006] An automatic power conversion device for improving the energy efficiency of an LNG dredger comprises a protective shell, a movable plate slidably connected to the interior of the protective shell, an LNG fuel engine device and a gasoline engine device fixedly connected to the upper surface of the movable plate, a pressure gauge fixedly connected to the side surface of the LNG fuel engine device, a pointer rotatably connected to the interior of the pressure gauge, a turntable fixedly connected to the other end of the pointer, a connecting rod rotatably connected to the circumferential surface of the turntable, a connecting rod slidably connected to the side surface of the LNG fuel engine device, one end of the connecting rod and the other end of the connecting rod being rotatably connected, a first conductive sheet fixedly connected to the surface of the connecting rod, an electromagnetic block fixedly connected to the upper surface of the movable plate, a second conductive sheet fixedly connected to the upper surface of the electromagnetic block, a switch provided on the upper surface of the movable plate, a first gear fixedly connected to the rotating shaft end of the switch, a first rack slidably connected to the upper surface of the movable plate, the first rack and the first gear meshing with each other, and both ends of the first rack being made of magnetic material, a heat dissipation mechanism provided on the upper surface of the movable plate, and a buffer mechanism provided inside the protective shell;

[0007] A magnet is fixedly connected to the upper surface of the movable plate, and the magnet and one end of the first rack have opposite magnetic properties. When energized, the magnetic force of the electromagnetic block is greater than the magnetic force of the magnet, and the magnetic force of the electromagnetic block and the other end of the first rack have opposite magnetic properties.

[0008] The buffer mechanism includes a limit rod fixedly connected to the inside of the protective shell, and the limit rod is T-shaped. The surface of the limit rod is slidably connected to the inside of the movable plate. A first spring is fixedly connected between the lower surface of the movable plate and the inner lower surface of the protective shell. The first conductive sheet is located directly above the second conductive sheet. A second spring is fixedly connected between the side surface of the first rack and the upper surface of the movable plate.

[0009] Furthermore, when the first conductive sheet contacts the second conductive sheet, the electromagnetic block is energized, and the electromagnetic block attracts the first rack, causing the first rack to slide and stretch the second spring, and engage with the first gear. At the same time, the first gear drives the switch to rotate.

[0010] Furthermore, the heat dissipation mechanism includes a shell fixedly connected to the inside of the protective shell, the inner upper surface of the shell is fixedly connected to a filter, the lower surface of the filter is fixedly connected to a motor, the output end of the motor is fixedly connected to a fan blade, the other output end of the motor is fixedly connected to a scraper, and the lower surface of the scraper is in contact with the lower surface of the filter, and the circumferential surface of the shell is fixedly connected to an exhaust pipe.

[0011] Furthermore, the heat dissipation mechanism also includes an air intake rack fixedly connected to the upper surface of the movable plate, and a plurality of air intake valves are fixedly connected to the circumferential surface of the air intake rack. The backs of the LNG fuel engine equipment and the gasoline engine equipment are both fixedly connected to heat dissipation plates, and the backs of the heat dissipation plates are both fixedly connected to exhaust plates, and one side of the exhaust plate is fixedly connected to one end of the air intake valve.

[0012] Furthermore, a transmission mechanism is provided on the circumferential surface of the air intake frame, and the transmission mechanism includes a second gear rotatably connected to the circumferential surface of the fixed frame, the inner side wall of the protective shell is rotatably connected to the third gear, and the upper surface of the movable plate is slidably connected to the second rack, and the second gear and the third gear are engaged with the second rack.

[0013] Furthermore, the valve shaft end of the intake valve and the rotating shaft end of the third gear are both fixedly connected to pulleys, and the pulleys are connected by belt transmission. The rotating end of the first gear is fixedly connected to a fixed rod, and one end of the fixed rod is fixedly connected to the rotating end of the second gear.

[0014] Furthermore, a first limit block and a second limit block are fixedly connected to the upper surface of the movable plate, the inner side of the first limit block is slidably connected to both sides of the first rack, and the inner side of the second limit block is slidably connected to both sides of the second rack.

[0015] Furthermore, a plurality of cover plates are rotatably connected to the upper surface of the protective shell, and the upper surfaces of the cover plates are each provided with a finger groove.

[0016] Furthermore, a plurality of exhaust holes are provided inside the exhaust plate, and the heat dissipation plate is made of aluminum.

[0017] Beneficial effects of the present invention:

[0018] 1. When using this device, when the fuel inside the LNG fuel engine equipment is consumed, the pointer inside the pressure gauge rotates, and the pointer drives the turntable to rotate. While the turntable drives the connecting rod to rotate, the connecting rod drives the moving rod to slide in the LNG fuel engine equipment and drives the first conductive sheet to descend. The first conductive sheet and the second conductive sheet contact and energize the electromagnetic block. The electromagnetic block attracts the first rack, causing the first rack to slide and mesh with the first gear, causing the first gear to drive the switch to rotate, and the kinetic energy can be converted into the interior of the gasoline engine equipment through the switch to provide power. The operation is simple. After the LNG fuel is used up, the switch is driven to rotate by mechanical transmission, and the switch is used to automatically switch the power fuel for use. There is no need to use electronic intelligent devices for control, so there is no need to use electricity for the control device, thereby improving the energy saving effect, and the mechanical parts have a long service life and a wide range of applicable environments. When the mechanical parts are damaged, they can be quickly disassembled and replaced to ensure subsequent use, reducing the maintenance workload.

[0019] 2. By providing a heat dissipation mechanism, when LNG fuel is used to provide power, the first gear drives the second gear at one end of the fixed rod to rotate, the second gear and the second rack are meshed, so that the second rack slides and meshes with the third gear, so that the valve stems of the intake valves at both ends rotate synchronously, thereby opening the intake valve behind the LNG fuel engine equipment and closing the intake valve behind the gasoline engine equipment. The motor is turned on to drive the fan blades to rotate and send external cold air into the interior of the air intake frame. The air intake frame sends the cold air into the interior of the exhaust plate through the intake valve, and then blows it evenly to the surface of the heat sink through the exhaust holes. The heat sink absorbs the heat of the LNG fuel engine equipment and performs heat dissipation operation. When the gasoline engine equipment is used, the intake valve can be automatically engaged to dissipate heat for the gasoline engine equipment. The operation is simple and convenient for dissipating heat to the fuel tank currently providing power to prevent the problem of excessive temperature causing a decrease in the service life of the engine. BRIEF DESCRIPTION OF THE DRAWINGS

[0020] The present invention will be further described below with reference to the accompanying drawings.

[0021] Figure 1 It is a schematic diagram of the overall structure of the present invention;

[0022] Figure 2 This is a front structural cross-sectional view of the structure of the present invention;

[0023] Figure 3 This is a cross-sectional view of the back structure of the present invention;

[0024] Figure 4 It is a partial structural schematic diagram of the LNG fuel engine equipment of the present invention;

[0025] Figure 5 It is a structural schematic diagram of the air intake frame of the present invention;

[0026] Figure 6 is a cross-sectional view of the internal structure of the housing of the present invention;

[0027] Figure 7 It is a structural schematic diagram of the exhaust plate of the present invention;

[0028] Figure 8 This invention Figure 4 A partial enlarged view of middle A.

[0029] In the figure: 1. Protective shell; 2. LNG fuel engine equipment; 3. Gasoline engine equipment; 4. Moving plate; 5. Limit rod; 6. First spring; 7. Adjustment switch; 8. Pressure gauge; 9. Pointer; 10. Turntable; 11. Connecting rod; 12. Connecting rod; 13. First conductive sheet; 14. Electromagnetic block; 15. Second conductive sheet; 16. First gear; 17. First rack; 18. Second spring; 19. Magnet; 20. First limit block; 21. Fixed rod; 22. Second gear; 23. Intake frame; 24. Intake valve; 25. Pulley; 26. Second rack; 27. Third gear; 28. Second limit block; 29. ​​Filter; 30. Motor; 31. Scraper; 32. Fan blade; 33. Exhaust pipe; 34. Exhaust plate; 35. Heat sink; 36. Exhaust hole; 37. Cover plate; 38. Finger groove; 39. Shell. DETAILED DESCRIPTION

[0030] The following will be combined with the embodiments of the present invention to clearly and completely describe the technical solutions in the embodiments of the present invention. Obviously, the embodiments described 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 making any creative efforts shall fall within the scope of protection of the present invention.

[0031] See also Figure 1-8As shown, a power automatic conversion device for improving the energy efficiency of an LNG dredger comprises a protective shell 1, a movable plate 4 is slidably connected to the interior of the protective shell 1, an LNG fuel engine device 2 and a gasoline engine device 3 are fixedly connected to the upper surface of the movable plate 4, a pressure gauge 8 is fixedly connected to the side surface of the LNG fuel engine device 2, a pointer 9 is rotatably connected to the interior of the pressure gauge 8, a turntable 10 is fixedly connected to the other end of the pointer 9, a connecting rod 11 is rotatably connected to the circumferential surface of the turntable 10, a connecting rod 12 is slidably connected to the side surface of the LNG fuel engine device 2, and one end of the connecting rod 12 is fixedly connected to the side surface of the LNG fuel engine device 2. It is rotatably connected to the other end of the connecting rod 11, and the surface of the connecting rod 12 is fixedly connected to the first conductive sheet 13, the upper surface of the movable plate 4 is fixedly connected to the electromagnetic block 14, the upper surface of the electromagnetic block 14 is fixedly connected to the second conductive sheet 15, and a switch is provided on the upper surface of the movable plate 4, and the rotating shaft end of the switch is fixedly connected to the first gear 16, and the upper surface of the movable plate 4 is slidably connected to the first rack 17, the first rack 17 and the first gear 16 are engaged with each other, and both ends of the first rack 17 are made of magnetic material, the upper surface of the movable plate 4 is provided with a heat dissipation mechanism, and the inside of the protective shell 1 is provided with a buffer mechanism.

[0032] When the fuel inside the LNG fuel engine device 2 is consumed, the pointer 9 inside the pressure gauge 8 rotates, and the pointer 9 drives the turntable 10 to rotate. While the turntable 10 drives the connecting rod 11 to rotate, the connecting rod 11 drives the moving rod to slide in the LNG fuel engine device 2 and drives the first conductive piece 13 to descend. The first conductive piece 13 and the second conductive piece 15 contact and energize the electromagnetic block 14. The electromagnetic block 14 attracts the first rack 17 to make the first rack 17 slide and stretch the second spring 18, and mesh with the first gear 16, so that the first gear 16 drives the switch to rotate, and the kinetic energy can be converted to the internal of the gasoline engine device 3 through the switch. The LNG fuel engine device 2 is used to provide power. When the internal raw material of the LNG fuel engine device 2 is full, the spring drives the first rack 17 to reset, and the first rack 17 and the magnet 19 are adsorbed to fix the first rack 17. The operation is simple. After the LNG fuel is used up, the switch is driven to rotate by mechanical transmission, and the switch is used to automatically switch the power fuel for use. There is no need to use electronic intelligent devices for control, so there is no need to use electricity for control equipment, thereby improving energy saving effects, and the mechanical parts have a long service life and a wide range of applicable environments. When the mechanical parts are damaged, they can be quickly disassembled and replaced to ensure subsequent use, reducing the intensity of maintenance work.

[0033] Among them, a magnet 19 is fixedly connected to the upper surface of the movable plate 4, and the magnetism of the magnet 19 and one end of the first rack 17 are opposite to each other. After power is applied, the magnetic force of the electromagnetic block 14 is greater than the magnetic force of the magnet 19, and the magnetic force of the electromagnetic block 14 and the other end of the first rack 17 are opposite to each other.

[0034] When the LNG fuel engine equipment 2 is used, the magnet 19 attracts one end of the first rack 17 to prevent the first rack 17 from moving at a uniform speed due to the outside world. When the first conductive sheet 13 and the second conductive sheet 15 are in contact, the electromagnetic block 14 is energized. The magnetic force of the electromagnetic block 14 is greater than the magnetic force of the magnet 19, so that the electromagnetic block can attract the first gear 16 to slide and drive the first gear 16 to rotate, so that the switch rotates and automatically switches.

[0035] Among them, the buffer mechanism includes a limiting rod 5 fixedly connected to the inside of the protective shell 1, and the limiting rod 5 is T-shaped. The surface of the limiting rod 5 is slidingly connected to the inside of the movable plate 4, and a first spring 6 is fixedly connected between the lower surface of the movable plate 4 and the inner lower surface of the protective shell 1.

[0036] When the LNG fuel engine equipment 2 or the gasoline engine equipment 3 generates vibration during operation, the movable plate 4 slides on the surface of the limit rod 5 after being vibrated and squeezes the first spring 6 at the same time, which can buffer the movable plate 4, thereby avoiding the problem of the service life of the LNG fuel engine equipment 2 and the gasoline engine being reduced due to vibration.

[0037] Among them, the heat dissipation mechanism includes a shell 39 fixedly connected to the inside of the protective shell 1, the inner upper surface of the shell 39 is fixedly connected to the filter 29, the lower surface of the filter 29 is fixedly connected to the motor 30, the output end of the motor 30 is fixedly connected to the fan blade 32, and the other output end of the motor 30 is fixedly connected to the scraper 31, and the lower surface of the scraper 31 is in contact with the lower surface of the filter 29, and the circumferential surface of the shell 39 is fixedly connected to the exhaust pipe 33.

[0038] The rotation of the motor 30 drives the fan blades 32 and the scraper 31 to rotate. The fan blades 32 blow out cold air into the interior of the exhaust pipe 33. At the same time, the dust on the surface of the filter 29 is cleaned by the scraper 31 to prevent external dust from being adsorbed on the surface of the scraper 31, resulting in a decrease in air intake efficiency and affecting the heat dissipation effect.

[0039] Among them, the heat dissipation mechanism also includes an air intake frame 23 fixedly connected to the upper surface of the movable plate 4, and a plurality of air intake valves 24 are fixedly connected to the circumferential surface of the air intake frame 23. The backs of the LNG fuel engine equipment 2 and the gasoline engine equipment 3 are fixedly connected to heat dissipation plates 35, and the backs of the heat dissipation plates 35 are fixedly connected to exhaust plates 34, and one side of the exhaust plate 34 is fixedly connected to one end of the air intake valve 24. The circumferential surface of the air intake frame 23 is provided with a transmission mechanism.

[0040] The cold air enters the interior of the air intake frame 23 through the exhaust pipe, and is then discharged into the interior of the exhaust plate 34 behind the engine block that is providing power through the open air intake valve 24. The cold air is then evenly sent to various parts of the heat sink 35 through the exhaust holes 36, thereby effectively cooling the heat sink 35. The heat sink 35 absorbs and dissipates the heat generated by the working engine block.

[0041] Among them, the transmission mechanism includes a second gear 22 rotatably connected to the circumferential surface of the fixed frame, the inner side wall of the protective shell 1 is rotatably connected to the third gear 27, the upper surface of the movable plate 4 is slidably connected to the second rack 26, the second gear 22 and the third gear 27 are meshed with the second rack 26, the valve shaft end of the intake valve 24 and the rotating shaft end of the third gear 27 are fixedly connected to the pulley 25, and the pulleys 25 are connected by belt transmission, the rotating end of the first gear 16 is fixedly connected to the fixed rod 21, and one end of the fixed rod 21 is fixedly connected to the rotating end of the second gear 22.

[0042] When the switch is rotated to switch, the first gear 16 drives the second gear 22 at one end of the fixed rod 21 to rotate, and the second gear 22 is engaged with the second rack 26, so that the second rack 26 and the third gear 27 are engaged with each other, and the third gear 27 drives the pulley 25 to rotate. The pulley 25 drives the valve stem of the intake valve 24 to rotate through the cooperation of the belt, thereby facilitating the control of opening the appropriate intake valve 24 to deliver cold air to improve the heat dissipation effect.

[0043] Among them, the upper surface of the movable plate 4 is fixedly connected with a first limit block 20 and a second limit block 28. The inner side of the first limit block 20 is slidingly connected to the two sides of the first rack 17, and the inner side of the second limit block 28 is slidingly connected to the two sides of the second rack 26, which is convenient for limiting the first rack 17 and the second rack 26, making the movement more stable.

[0044] Among them, the first conductive sheet 13 is located directly above the second conductive sheet 15, which is convenient for energizing the electromagnetic block 14 after contact. A second spring 18 is fixedly connected between the side surface of the first rack 17 and the upper surface of the movable plate 4, which is convenient for driving the first rack 17 to reset after the electromagnetic block 14 is not energized.

[0045] A plurality of exhaust holes 36 are provided inside the exhaust plate 34 , and the heat sink 35 is made of aluminum, which can evenly discharge cold air into the surface of the heat sink 35 .

[0046] The upper surface of the protective shell 1 is rotatably connected to a plurality of cover plates 37 , and the upper surfaces of the cover plates 37 are each provided with finger grooves 38 , which facilitate the user to open the protective shell 1 for refueling or maintenance operations.

[0047] The above contents are merely examples and explanations of the present invention. Those skilled in the art may make various modifications or additions to the described specific embodiments or replace them in similar ways. As long as they do not deviate from the invention or exceed the scope defined by the claims, they should all fall within the scope of protection of the present invention.

Claims

1. A power automatic conversion device for improving energy efficiency of LNG dredger, characterized in that: The invention comprises a protective shell (1), wherein a movable plate (4) is slidably connected to the interior of the protective shell (1), an LNG fuel engine device (2) and a gasoline engine device (3) are fixedly connected to the upper surface of the movable plate (4), a pressure gauge (8) is fixedly connected to the side surface of the LNG fuel engine device (2), a pointer (9) is rotatably connected to the interior of the pressure gauge (8), the other end of the pointer (9) is fixedly connected to a turntable (10), the circumferential surface of the turntable (10) is rotatably connected to a connecting rod (11), the side surface of the LNG fuel engine device (2) is slidably connected to a connecting rod (12), and one end of the connecting rod (12) is rotatably connected to the other end of the connecting rod (11). The surface of the connecting rod (12) is fixedly connected to a first conductive sheet (13), the upper surface of the movable plate (4) is fixedly connected to an electromagnetic block (14), the upper surface of the electromagnetic block (14) is fixedly connected to a second conductive sheet (15), the upper surface of the movable plate (4) is provided with a switch, the rotating shaft end of the switch is fixedly connected to a first gear (16), the upper surface of the movable plate (4) is slidably connected to a first rack (17), the first rack (17) and the first gear (16) are meshed with each other, and both ends of the first rack (17) are made of magnetic material, the upper surface of the movable plate (4) is provided with a heat dissipation mechanism, and the interior of the protective shell (1) is provided with a buffer mechanism; A magnet (19) is fixedly connected to the upper surface of the movable plate (4), and the magnet (19) and one end of the first rack (17) have opposite magnetic properties. When energized, the magnetic force of the electromagnetic block (14) is greater than the magnetic force of the magnet (19), and the magnetic properties of the other end of the electromagnetic block (14) and the first rack (17) are opposite; The buffer mechanism comprises a limiting rod (5) fixedly connected to the inside of the protective shell (1), and the limiting rod (5) is in a T-shape. The surface of the limiting rod (5) is slidably connected to the inside of the movable plate (4). A first spring (6) is fixedly connected between the lower surface of the movable plate (4) and the inner lower surface of the protective shell (1). The first conductive sheet (13) is located directly above the second conductive sheet (15). A second spring (18) is fixedly connected between the side surface of the first rack (17) and the upper surface of the movable plate (4).

2. The automatic power conversion device for improving energy efficiency of LNG dredger according to claim 1, characterized in that: When the first conductive sheet (13) and the second conductive sheet (15) are in contact, the electromagnetic block (14) is energized, and the electromagnetic block (14) attracts the first rack (17), causing the first rack (17) to slide and stretch the second spring (18), and mesh with the first gear (16). At the same time, the first gear (16) drives the switch to rotate.

3. The automatic power conversion device for improving energy efficiency of LNG dredger according to claim 1, characterized in that: The heat dissipation mechanism comprises a shell (39) fixedly connected to the interior of the protective shell (1); a filter (29) is fixedly connected to the inner upper surface of the shell (39); a motor (30) is fixedly connected to the lower surface of the filter (29); an output end of the motor (30) is fixedly connected to a fan blade (32); another output end of the motor (30) is fixedly connected to a scraper (31); the lower surface of the scraper (31) is in contact with the lower surface of the filter (29); and an exhaust pipe (33) is fixedly connected to the circumferential surface of the shell (39).

4. The automatic power conversion device for improving energy efficiency of LNG dredger according to claim 3 is characterized in that: The heat dissipation mechanism further includes an air intake frame (23) fixedly connected to the upper surface of the movable plate (4), a plurality of air intake valves (24) fixedly connected to the circumferential surface of the air intake frame (23), a heat dissipation plate (35) fixedly connected to the back of each of the LNG fuel engine device (2) and the gasoline engine device (3), an exhaust plate (34) fixedly connected to the back of each of the heat dissipation plates (35), and one side of the exhaust plate (34) fixedly connected to one end of the air intake valve (24).

5. The automatic power conversion device for improving energy efficiency of LNG dredger according to claim 4, characterized in that: The circumferential surface of the air intake frame (23) is provided with a transmission mechanism, the transmission mechanism comprising a second gear (22) rotatably connected to the circumferential surface of the fixed frame, a third gear (27) rotatably connected to the inner side wall of the protective shell (1), and a second rack (26) slidably connected to the upper surface of the movable plate (4), and the second gear (22) and the third gear (27) are meshed with the second rack (26).

6. The automatic power conversion device for improving energy efficiency of an LNG dredger according to claim 5, characterized in that: The valve shaft end of the intake valve (24) and the rotating shaft end of the third gear (27) are both fixedly connected to a pulley (25), and the pulleys (25) are connected via a belt transmission. The rotating end of the first gear (16) is fixedly connected to a fixed rod (21), and one end of the fixed rod (21) is fixedly connected to the rotating end of the second gear (22).

7. The automatic power conversion device for improving energy efficiency of an LNG dredger according to claim 1, characterized in that: A first limiting block (20) and a second limiting block (28) are fixedly connected to the upper surface of the movable plate (4); the inner side of the first limiting block (20) is slidably connected to both sides of the first rack (17); and the inner side of the second limiting block (28) is slidably connected to both sides of the second rack (26).

8. The automatic power conversion device for improving energy efficiency of an LNG dredger according to claim 1, characterized in that: The upper surface of the protective shell (1) is rotatably connected to a plurality of cover plates (37), and the upper surfaces of the cover plates (37) are each provided with a finger groove (38).

9. The automatic power conversion device for improving energy efficiency of an LNG dredger according to claim 4, characterized in that: A plurality of exhaust holes (36) are provided inside the exhaust plate (34), and the heat dissipation plate (35) is made of aluminum.

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