Oil-gas switching device for a marine dual-fuel engine

Abstract

The present invention relates to an oil-gas switching device for a dual-fuel marine engine. The oil-gas switching device comprises an oil-gas switch module and a switching module. The switching module is placed at the throttle control lever / plate of the ship. When the ship accelerates suddenly, the throttle control lever / plate moves quickly, so that the air pressure in the enclosed space increases, and the gas moves into the telescopic part, so that the telescopic part extends, and the telescopic part drives the knob to rotate to the fuel mode. After the gas in the enclosed space overflows the enclosed space through the air hole, the return spring drives the telescopic part to shorten, so that the knob switches to the gas mode. The present invention adds a mechanical mechanism at the throttle control lever / plate of the ship, and can control the oil-gas switching switch to switch between the fuel mode and the gas mode quickly and accurately according to the moving speed of the throttle control lever / plate, without the intervention of a large number of sensors, which not only saves costs, but also improves the speed of oil-gas switching response.

Description

Technical Field

[0001] The invention belongs to the technical field of switches, and in particular relates to an oil-gas switching device for a marine dual-fuel engine. Background Art

[0002] Marine dual-fuel engines are gaining increasing attention due to their higher combustion efficiency, lower emissions and cost-effectiveness. Such engines can switch between oil and gas to adapt to different sailing conditions and needs.

[0003] Although the use of gas can reduce costs, the use of gas will reduce the power performance of the engine. For ships with sudden acceleration or special types of ships, such as yachts, the use of gas during acceleration will affect the acceleration effect.

[0004] In order to meet the driver's requirements for power and safety, the existing dual-fuel engines have a "special operating condition" function, that is, after the engine enters the gas state, once several conditions are met at the same time, the engine will temporarily switch to the fuel state. When the driver's requirements for power are reduced, the engine will automatically switch back to gas mode.

[0005] However, this switching technology is based on the need for a large number of sensors. For example, it is necessary to measure and summarize parameters such as throttle opening, engine speed, and travel speed. Only when all these parameters are met can the fuel state be switched. This not only places great demands on the accuracy of the sensors, but also wastes a lot of time in the detection of numerous sensors and the aggregation and processing of data, which makes the fuel switching response speed slow, directly affecting the performance of the engine. Summary of the invention

[0006] The purpose of the present invention is to provide an oil-gas switching device for a marine dual-fuel engine in order to solve the problems raised in the above background technology.

[0007] The present invention achieves the above-mentioned purpose through the following technical solutions:

[0008] An oil-gas switching device for a dual-fuel marine engine, comprising an oil-gas switch module, the oil-gas switch module comprising a switch body and a knob, and a switching module, the switching module comprising a mounting seat, a core block being rotatably mounted on the mounting seat, a cylinder being movably sleeved on the core block, an end of the cylinder away from the core block being sealed, and an end of the core block located inside the cylinder and the inner cavity of the cylinder forming a closed space;

[0009] The end of the cylinder that is not in contact with the core block is provided with a plurality of air holes, and the end is provided with a pipe, the cylinder is connected to a telescopic member through the pipe, and the inner cavity of the telescopic member is provided with a return spring;

[0010] The telescopic member is fixedly mounted on the switch body, a baffle is fixed on the knob, and the telescopic end of the telescopic member is fixedly connected to the baffle;

[0011] The switching module is placed at the throttle control lever / plate of the ship. When the ship accelerates suddenly, the throttle control lever / plate moves quickly, which increases the air pressure in the confined space and moves the gas into the telescopic part, causing the telescopic part to extend. The telescopic part drives the knob to turn to the fuel mode. After the gas in the confined space overflows the confined space through the air hole, the reset spring drives the telescopic part to shorten, causing the knob to switch to the gas mode.

[0012] Preferably, the core block and the barrel are clearance-fitted, and the surface of the core block is coated with lubricating oil.

[0013] Preferably, when the core block moves to the maximum stroke, the core block blocks a plurality of pores, and the gas in the closed space does not exchange with the external gas.

[0014] Preferably, the distances between the plurality of air holes and the end of the cylinder are different;

[0015] A plurality of telescopic rods corresponding to the air holes are fixedly arranged on the cylinder, the inner cavity of the telescopic rods is connected to the closed space, and the distances between the telescopic rods and the ends of the cylinder are equal;

[0016] When the air pressure in the enclosed space increases, the telescopic rod is extended, and the telescopic rod blocks the air hole, so that the time for gas in the enclosed space to overflow is prolonged.

[0017] Preferably, a magnetic block is provided on the switch body, and the baffle is made of magnetic material, and the magnetic properties of the magnetic block and the baffle are opposite.

[0018] The beneficial effects of the present invention are:

[0019] 1. The present invention adds a mechanical mechanism to the throttle control lever / plate of the ship, and can control the oil and gas switching switch to quickly and accurately switch between the fuel mode and the gas mode according to the moving speed of the throttle control lever / plate, without requiring the intervention of a large number of sensors, which not only saves costs but also improves the speed of the oil and gas switching response, so that the engine can quickly switch to the high power mode, thereby increasing the application range of the engine.

[0020] 2. The present invention can also cope with the "floor oil" mode of the engine, making the present invention more intelligent.

[0021] 3. The present invention can control the fuel mode duration of the engine according to the different moving speeds of the throttle control lever / plate, so that the engine can be accelerated according to the driver's acceleration intention. BRIEF DESCRIPTION OF THE DRAWINGS

[0022] Figure 1It is a schematic diagram of the overall structure of the present invention;

[0023] Figure 2 is a schematic structural diagram of a switching module of the present invention;

[0024] Figure 3 It is a schematic diagram of the working principle of the switching module when the engine is in full operation in the present invention;

[0025] Figure 4 It is a cross-sectional view of the telescopic member in the present invention.

[0026] In the figure: 1. switch body; 2. knob; 3. mounting base; 4. core block; 5. cylinder; 6. enclosed space; 7. air hole; 8. telescopic part; 9. baffle; 10. telescopic rod; 11. magnet; a. shell; b. push rod; c. reset spring. DETAILED DESCRIPTION

[0027] The present application is described in further detail below. It is necessary to point out that the following specific implementation methods are only used to further illustrate the present application and cannot be understood as limiting the scope of protection of the present application. Technicians in this field can make some non-essential improvements and adjustments to the present application based on the above application content.

[0028] Example 1

[0029] like Figure 1-4 As shown, an oil-gas switching device for a marine dual-fuel engine includes an oil-gas switch module, and the oil-gas switch module includes a switch body 1 and a knob 2. The switch body 1 is connected to a plurality of valves (existing technology, no further description is given here). The switch body 1 includes a fuel indicator light and a gas indicator light. When the knob 2 is turned to point to the fuel indicator light, the engine only uses fuel, which is the fuel mode, and the same is true for gas. The knob 2 usually points to the gas indicator light. The fuel mode is automatically switched only when the ship is started or at low idle speed, and the gas mode is automatically switched after the water temperature rises or the speed reaches the standard.

[0030] The oil-gas switching device further comprises a switching module, which comprises a mounting seat 3. A core block 4 is rotatably mounted on the mounting seat 3, and a cylinder 5 is movably sleeved on the core block 4. One end of the cylinder 5 away from the core block 4 is sealed, and one end of the core block 4 located inside the cylinder 5 and the inner cavity of the cylinder 5 form a closed space 6.

[0031] The end of the cylinder 5 not in contact with the core block 4 is provided with a plurality of air holes 7, and a pipe is fixedly provided at the end, and the cylinder 5 is connected to a telescopic member 8 through the pipe. The telescopic member 8 adopts an arc structure, including a shell a, a push rod b, and a return spring c is fixedly connected between the shell a and the push rod b. The shell a is provided with an air inlet hole, and the gas enters the inner cavity of the shell a to drive the push rod b to move.

[0032] The telescopic member 8 is fixedly mounted on the switch body 1 , a baffle 9 is fixed on the knob 2 , and a telescopic end of the telescopic member 8 is fixedly connected to the baffle 9 .

[0033] It should be noted that when a ship needs to accelerate suddenly, the handle throttle is often pushed quickly or the foot throttle is pressed. The switching module is placed at the throttle control lever / plate of the ship, the cylinder 5 is fixedly connected to the throttle control lever / plate, and the base is fixedly installed on the corresponding panel, so that the cylinder 5 can move synchronously with the throttle control lever / plate.

[0034] When the ship accelerates slowly, the throttle control lever / plate moves slowly and drives the cylinder 5 to move, the core block 4 slowly enters the cylinder 5, the gas in the enclosed space 6 has enough time to overflow from the air hole 7, the telescopic part 8 does not react, and the ship is in the gas mode.

[0035] When the ship accelerates suddenly, the throttle control lever / plate moves quickly and drives the cylinder 5 to move, so that the core block 4 quickly enters the cylinder 5, so that the gas in the enclosed space 6 cannot instantly overflow from the air hole 7. The air pressure in the enclosed space 6 increases, so that the gas moves through the pipeline to the telescopic member 8, and the telescopic member 8 extends. The telescopic member 8 drives the knob 2 to turn to the fuel mode. In the fuel mode, the power of the engine is enhanced and can accelerate quickly. After the gas in the enclosed space 6 slowly overflows from the enclosed space 6 through the air hole 7, the air pressure in the enclosed space 6 is reduced, and the return spring drives the telescopic member 8 to shorten, so that the knob 2 switches to the gas mode.

[0036] In the above embodiment, the core block 4 and the cylinder 5 are clearance-fitted, and the surface of the core block 4 is coated with lubricating oil, so that the sliding friction between the core block 4 and the cylinder 5 is small, avoiding affecting the normal movement of the throttle control rod / plate.

[0037] Furthermore, when the core block 4 moves to the maximum stroke, the core block 4 blocks a plurality of air holes 7 .

[0038] It should be noted that the above-mentioned rapid acceleration is not a full acceleration state. When full acceleration is applied (i.e., the "floor fuel" state), the throttle control lever / plate will reach its maximum stroke, so that the core block 4 also enters the cylinder 5 to a maximum depth, and the core block 4 blocks all the air holes 7. The gas in the enclosed space 6 cannot overflow from the air holes 7. At this time, the telescopic member 8 always drives the knob 2 to point to the fuel indicator light, and the engine will always be in the fuel mode, and the engine will run at full power.

[0039] By setting the gap smaller, there is no exchange between the gas in the enclosed space 6 and the external gas, which can avoid the problem of gas overflowing from the gap and being unable to lock the "floor oil" mode.

[0040] Furthermore, the distances between the plurality of air holes 7 and the end of the cylinder 5 are different.

[0041] A plurality of telescopic rods 10 corresponding to the air holes 7 are fixedly arranged on the cylinder 5, the inner cavity of the telescopic rods 10 is connected to the closed space 6, and the distances between the telescopic rods 10 and the ends of the cylinder 5 are equal. That is, the distances between the telescopic rods 10 and the corresponding air holes 7 are different.

[0042] The number of the telescopic rods 10 is one less than the number of the air holes 7 to avoid completely blocking the air holes 7 when the "floor oil" mode is not entered.

[0043] It should be noted that, because the air hole 7 is constantly leaking gas outwards, coupled with the elastic force of the return spring, the time for the telescopic member 8 to drive the knob 2 to rotate is relatively short. In order to extend the use time of the fuel mode and ensure that the ship can be sufficiently accelerated, when the air pressure in the confined space 6 increases, the gas is introduced into the inner cavity of the telescopic rod 10, thereby extending the telescopic rod 10. The telescopic rod 10 blocks the air hole 7, and the speed at which the gas in the confined space 6 overflows from the air hole 7 is reduced, thereby extending the time for the gas in the confined space 6 to overflow.

[0044] The number of blocked air holes 7 is determined by the moving speed of the throttle control rod / plate. When the moving speed of the throttle control rod / plate is fast, that is, the time required for acceleration is greater, the air pressure in the enclosed space 6 increases faster, so that the telescopic rod 10 is extended to a greater extent, thereby blocking more air holes 7. The gas overflow time in the enclosed space 6 is extended more, so that the acceleration time of the ship is longer.

[0045] Furthermore, a magnetic block 11 is provided on the switch body 1, and the baffle 9 is made of magnetic material, and the magnetic properties of the two are opposite. In order to prevent the telescopic member 8 from accidentally driving the knob 2 to rotate during slow acceleration, the magnetic block 11 and the baffle 9 are attracted to each other, so that a certain starting thrust is required for the knob 2 to rotate. When the ship accelerates slowly, the movement speed of the cylinder 5 is slow, and the pressure of the gas in the confined space 6 on the telescopic member 8 is not enough to drive the baffle 9 and the magnetic block 11 to separate. When the telescopic member 8 is filled with a large amount of gas, it has a greater tendency to stretch, and the thrust of the telescopic member 8 on the baffle 9 can overcome the magnetic attraction between the magnetic block 11 and the baffle 9, thereby causing the knob 2 to rotate.

[0046] The above-mentioned embodiments only express several implementation methods of the present invention, and the description thereof is relatively specific and detailed, but it cannot be understood as limiting the scope of the present invention. It should be pointed out that, for ordinary technicians in this field, several variations and improvements can be made without departing from the concept of the present invention, which all belong to the protection scope of the present invention.

Claims

1. An oil-gas switching device for a marine dual-fuel engine, comprising an oil-gas switch module, wherein the oil-gas switch module comprises a switch body (1) and a knob (2), characterized in that: The switch module also comprises a mounting seat (3), a core block (4) is rotatably mounted on the mounting seat (3), a cylinder (5) is movably sleeved on the core block (4), an end of the cylinder (5) away from the core block (4) is sealed, and an end of the core block (4) located inside the cylinder (5) and the inner cavity of the cylinder (5) form a closed space (6); The end of the cylinder (5) not in contact with the core block (4) is provided with a plurality of air holes (7), and a pipeline is provided at the end, the cylinder (5) is connected to a telescopic member (8) through the pipeline, and a return spring (c) is provided in the inner cavity of the telescopic member (8); The telescopic member (8) is fixedly mounted on the switch body (1), a baffle (9) is fixed on the knob (2), and the telescopic end of the telescopic member (8) is fixedly connected to the baffle (9); The switching module is placed at the throttle control lever / plate of the ship. When the ship accelerates suddenly, the throttle control lever / plate moves quickly, so that the air pressure in the enclosed space (6) increases, and the gas moves into the telescopic member (8), so that the telescopic member (8) extends, and the telescopic member (8) drives the knob (2) to rotate to the fuel mode. After the gas in the enclosed space (6) overflows the enclosed space (6) through the air hole (7), the return spring drives the telescopic member (8) to shorten, so that the knob (2) switches to the gas mode.

2. The oil-gas switching device of a marine dual-fuel engine according to claim 1, characterized in that: The core block (4) and the cylinder (5) are clearance-matched, and the surface of the core block (4) is coated with lubricating oil.

3. The oil-gas switching device of a marine dual-fuel engine according to claim 2, characterized in that: When the core block (4) moves to the maximum stroke, the core block (4) blocks a plurality of air holes (7), and the gas in the closed space (6) does not exchange with the external gas.

4. The oil-gas switching device of a marine dual-fuel engine according to claim 3, characterized in that: The distances between the plurality of air holes (7) and the end of the cylinder (5) are different; A plurality of telescopic rods (10) corresponding to the air holes (7) are fixedly provided on the cylinder (5); the inner cavities of the telescopic rods (10) are connected to the closed space (6); and the distances between the telescopic rods (10) and the ends of the cylinder (5) are equal; When the air pressure in the enclosed space (6) increases, the telescopic rod (10) is extended, and the telescopic rod (10) blocks the air hole (7), thereby prolonging the time for the gas in the enclosed space (6) to escape.

5. The oil-gas switching device of a marine dual-fuel engine according to claim 1, characterized in that: The switch body (1) is provided with a magnetic block (11), the baffle (9) is made of magnetic material, and the magnetic properties of the magnetic block (11) and the baffle (9) are opposite.

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