An evaporation device for an outboard engine using liquefied petroleum gas

Abstract

A liquefied petroleum gas evaporation device for an outboard motor includes a shell, characterized in that the shell is divided into an upper shell and a lower shell; the upper end of the upper shell and the lower end of the lower shell are both provided with fixed protrusions; the upper shell is provided with a water inlet pipe, the inner cavity of the lower shell is provided with a heating pipe, the water inlet pipe is connected to one end of the heating pipe; the upper shell is provided with a water outlet pipe, the water outlet pipe is connected to the other end of the heating pipe; the upper shell is provided with an LPG pipe, the LPG pipe is communicated with the inner cavity of the lower shell, and a valve needle is provided at the gas outlet end. The upper shell is provided with a float valve, the float valve is hinged to the float. The bottom of the float and the valve needle are matched and abutted, and the device can stably realize the conversion of liquid LPG in the lower shell into gaseous state, and is easy to fix; the heating heat comes from the heat generated by the combustion of the outboard motor itself, which can continuously provide the heat required for the vaporization of liquid LPG; 3, the valve needle can ensure that a fixed amount of liquid LPG is always maintained in the lower shell; 4, the device can be disassembled at multiple locations, which is convenient for maintenance.

Description

Technical Field

[0001] The utility model relates to the technical field of outboard motors, in particular to an evaporation device for a liquefied petroleum gas outboard motor. Background Art

[0002] With the increasingly stringent environmental protection, the country has increased its efforts to promote the goals of carbon peak and carbon neutrality, and the restrictions on fossil fuels such as petroleum have become increasingly severe. With the rapid economic development, the contradiction between domestic petroleum supply and demand has become increasingly prominent. As a fuel for outboard motors, more than 90% is mainly gasoline fuel, and the harmful emissions generated by fuel combustion bring great harm to the environment. It is particularly important to accelerate the development, use, energy conservation and environmental protection of alternative energy sources for outboard motors. Therefore, promoting the application of clean alternative fuels as a supplement to petroleum resources has very important strategic significance for our country. China is a country rich in coal, poor in oil and rich in gas. Liquefied petroleum gas has excellent characteristics such as high octane number, good anti-knock performance, high calorific value and low storage and transportation pressure, and is an excellent alternative fuel for fossil raw materials. It provides a good choice for alternative energy sources for outboard motors. At present, it has been gradually promoted and used in local tourist attractions and inland rivers and lakes in China. Liquefied Petroleum Gas (LPG for short) is a gas mixture mainly composed of propane, propylene, butane and butene. It is non-toxic, colorless and odorless under normal temperature and pressure. When starting in extremely cold weather, the outboard motor is restricted by the required butane content in the liquefied gas mixture and is not easy to burn at low temperature of 0°C. Because as the butane content in the fuel increases, the original pressure drops. At 0°C, butane cannot be converted into a gaseous state, which further restricts the wide use of liquefied petroleum gas on outboard motors. Liquefied gas can only burn in a gaseous state.

[0003] The above liquefied petroleum gas outboard motor has many advantages, but its disadvantages are very obvious. Especially in winter or in an environment with relatively low temperature, liquefied petroleum gas cannot absorb heat and turn into a gaseous state to participate in the combustion of the machine, thus restricting the popularization and application of liquefied petroleum gas. Summary of the Invention

[0004] Combining the use environment of the outboard motor and the physical properties of liquefied petroleum gas, the present invention solves the problem that liquid LPG cannot stably burn in the working environment of the outboard motor, and designs an evaporation device for a liquefied petroleum gas outboard motor, which has the following advantages: 1. It can stably convert the liquid gas in the lower shell into a gaseous state and participate in the combustion of the outboard motor engine, and is convenient to fix; 2. The heat for heating comes from the heat generated by the combustion of the outboard motor itself, and can continuously provide the heat for gas vaporization during the operation of the machine; 3. The special design of the valve needle can ensure that a fixed amount of liquid LPG is always maintained in the lower shell; 4. Many parts of the device can be disassembled, which is convenient for maintenance.

[0005] The present invention designs an evaporation device for a liquefied petroleum gas outboard engine to solve the above problems, which includes a housing divided into an upper housing and a lower housing; fixed protrusions are provided at the upper end of the upper housing and the lower end of the lower housing to facilitate the fixation of the entire device; a water inlet pipe is provided on the upper housing, a heating pipe is provided in the inner cavity of the lower housing, and the tail of the water inlet pipe is connected to one end of the heating pipe; a water outlet pipe is provided on the upper housing, and the water outlet pipe is connected to the other end of the heating pipe. The water inlet pipe, the heating pipe, and the water outlet pipe are connected and communicated; an LPG pipe is provided on the upper housing, and the LPG pipe is communicated with the inner cavity of the lower housing and a valve needle is provided at the gas outlet end. Through the hot water flowing in the heating pipe, the continuous and stable contact with the liquid LPG can steadily convert the liquid gas in the lower housing into a gaseous state and participate in the combustion of the outboard engine.

[0006] Preferably, the upper end of the valve needle is provided with an inclined surface, and the lower end is provided with a rod-shaped extension section, and the end of the rod-shaped extension section is disc-shaped.

[0007] Preferably, a float valve is provided on the upper housing near the gas outlet end of the LPG pipe, and the float valve is hinged with a float. The float makes a circular motion around the float valve as the liquid level of the liquid LPG in the lower housing rises and falls.

[0008] Preferably, a rod-shaped extension is provided on the part of the float near the float valve, a chute is provided on the rod-shaped extension, and the chute is in mating contact with the bottom of the valve needle. This increases the moving space of the valve needle and prevents the phenomenon that the valve needle is stuck and unable to move.

[0009] Preferably, a chute is provided in the axial direction of the valve needle, a chute is provided on the part of the LPG pipe near the outer surface of the lower housing, and the valve needle and the LPG pipe are combined through the chute. The valve needle makes a reciprocating motion vertically upward or vertically downward under the action of the float in contact with it, blocking or opening the gas outlet end of the LPG pipe, which can ensure that a fixed amount of liquid LPG is always maintained in the lower housing.

[0010] Preferably, a fine filter element and a coarse filter element are horizontally placed in the inner cavity of the upper housing, and the coarse filter element is arranged below the fine filter element.

[0011] Preferably, a cavity is formed between the coarse filter element and the fine filter element and the surrounding, and the cavity divides the inner cavity of the upper housing into upper and lower parts.

[0012] Preferably, an air outlet pipe is provided on the upper housing, and the air outlet pipe is communicated with the upper part of the inner cavity of the upper housing. Through the filter element, purer gaseous LPG can be transported to the outboard engine to participate in combustion.

[0013] Preferably, a heating block is provided at a position of the upper housing close to the coarse filter, and protrusions are provided on the outer surface of the heating block. The protrusions are combined with the outboard motor to further heat the gaseous LPG by means of the heat of the outboard motor.

[0014] Preferably, the upper housing is divided into a columnar housing and an upper cover, and the columnar housing is combined with the upper cover. When a failure occurs in the device, the upper cover can be opened for inspection.

[0015] Preferably, the fixing protrusions at the upper end of the upper housing are provided on the upper cover.

[0016] Preferably, the heating block is spirally connected to the upper housing. This facilitates the replacement and cleaning of the filter.

[0017] Preferably, the heating pipe is composed of two parts, a vertical pipe and a spiral pipe, and the vertical pipe and the spiral pipe are connected at the bottom position of the lower housing. This facilitates the cleaning of the position where the flow direction of the heating pipe changes abruptly.

[0018] Preferably, the LPG pipe, the air outlet pipe and the float valve are arranged in the same vertical direction in sequence, and the LPG pipe and the air outlet pipe are arranged on the same base. This facilitates installation.

[0019] The beneficial effects of the present invention are as follows: The present invention effectively solves the problem that liquid LPG cannot stably burn in the working environment of the outboard motor, and has the following advantages: 1. It can stably convert the liquid gas in the lower housing into gaseous state and participate in the combustion of the outboard motor engine, and is convenient for fixing; 2. The heat for heating comes from the heat generated by the combustion of the outboard motor itself, and the heat for gas vaporization can be continuously provided during the operation of the machine; 3. The special design of the valve needle can ensure that a fixed amount of liquid LPG is always maintained in the lower housing; 4. Many parts of the device can be disassembled, which is convenient for maintenance. BRIEF DESCRIPTION OF THE DRAWINGS

[0020] Figure 1 is the front elevation view of the evaporation device for an outboard motor using liquefied petroleum gas according to the present invention;

[0021] Figure 2 is the side elevation view of the evaporation device for an outboard motor using liquefied petroleum gas according to the present invention;

[0022] Figure 3 is the bottom elevation view of the evaporation device for an outboard motor using liquefied petroleum gas according to the present invention;

[0023] Figure 4 is the schematic view of the evaporation device for an outboard motor using liquefied petroleum gas according to the present invention;

[0024] Figure 5 is the structural sectional view of the evaporation device for an outboard motor using liquefied petroleum gas according to the present invention;

[0025] Figure 6 It is a cross-sectional view of the upper cover of an evaporation device for a liquefied petroleum gas outboard engine according to the present invention;

[0026] Figure 7 It is a working principle diagram of an evaporation device for a liquefied petroleum gas outboard engine according to the present invention.

[0027] In the figure: 1. LPG pipeline, 2. outlet pipe, 3. vertical pipeline, 4. spiral pipeline, 5. float valve, 6. float, 7. valve needle, 8. heating block, 9. fine filter element, 10. coarse filter element, 11. fixed protrusion, 12. chute, 13. upper shell, 14. lower shell, 15. outlet water pipe, 16. inlet water pipe, 17. shell, 18. column shell, 19. upper cover, 20. heating pipeline, 21. base. Specific embodiments

[0028] The following further describes the specific embodiments of the technical solution of the present invention through examples and in conjunction with the accompanying drawings.

[0029] Embodiment

[0030] In Figure 1 Figure 2 Figure 4 Figure 5 Figure 6 In the shown embodiment, an evaporation device for a liquefied petroleum gas outboard engine includes a shell 17. The shell 17 is divided into an upper shell 13 and a lower shell 14. The upper shell and the lower shell are combined together by threads, and fixed protrusions 11 are provided at the upper end of the upper shell 13 and the lower end of the lower shell 14. The fixed protrusion 11 is a regular hexagon. The upper shell 13 is provided with an inlet water pipe 16. A heating pipeline 20 is provided in the inner cavity of the lower shell 14. The inlet water pipe 16 is connected to the water inlet end of the heating pipeline 20; the upper shell 13 is provided with an outlet water pipe 15. The outlet water pipe 15 is connected to the water outlet end of the heating pipeline 20; the heating pipeline 20 is divided into two parts, one part is a vertical pipeline 3, and the other part is a spiral pipeline 4. The vertical pipeline 3 and the spiral pipeline 4 are spirally connected at the bottom of the lower shell 14. The upper shell 13 is provided with an LPG pipeline 1. The LPG pipeline 1 communicates with the inner cavity of the lower shell 14 and is provided with a valve needle 7 at the gas outlet end;

[0031] The water inlet pipe 16 is connected to the water cooling outlet of the outboard motor outside the device; the inner cavity of the upper shell 13 is provided with a horizontally placed fine filter 9 and a coarse filter 10, and the coarse filter 10 is arranged below the fine filter 9; the coarse filter 10 and the fine filter 9 form a cavity with the surroundings, and the cavity divides the inner cavity of the upper shell 13 into two parts, upper and lower; the upper shell 13 is provided with an air outlet pipe 2, and the air outlet pipe 2 is connected to the upper part of the inner cavity of the upper shell 13; the upper shell 13 is provided with a heating block 8 near the coarse filter 10 and the fine filter 9, and the heating block 8 is spirally connected to the upper shell, and the outer surface of the heating block 8 is provided with a protruding heating block, and the protruding position is combined and connected with the outboard motor housing;

[0032] The upper shell 13 is provided with a float valve 5 near the gas outlet end of the LPG pipeline 1, and the float valve 5 is hinged to the float 6; the main body of the float 6 is in the shape of a truncated cone with a small upper bottom surface and a large lower bottom surface, and the lower bottom surface of the truncated cone has a rod-shaped extension, and the end of the rod-shaped extension section is hinged to the float valve 5, and a slide groove 12 is provided on the rod-shaped extension section, and the slide groove 12 cooperates and abuts with the bottom of the valve needle 7; the end of the valve needle 7 in the axial direction is provided with a slide groove, and the part of the LPG pipeline 1 close to the outer surface of the lower shell 14 is provided with a slide groove, and the main body of the valve needle 7 is cylindrical, and an inclined surface is provided at the upper end of the valve needle 7, and a rod-shaped extension section is provided at the lower end, and the end of the rod-shaped extension section is in the shape of a round cake; the valve needle is provided with a slide groove in the axial direction, and is combined with the LPG pipeline 1 through the slide groove. The gas outlet end of the LPG pipeline 1 is beveled, and the part close to the shell 17 is slightly longer;

[0033] The upper shell 13 is divided into a column shell 18 and an upper cover 19 . The column shell 18 and the upper cover 19 are combined and spirally connected. The upper end fixing protrusion 11 of the upper shell 13 is arranged on the upper cover 19 .

[0034] The operation process of the present invention is as follows:

[0035] When the engine of the outboard motor is running after starting, before the thermostat opens, the cooling water circulates into the small circulation mode. The cooling water in the water channel is quickly heated. The cooling mechanism of the outboard motor is connected to the water inlet pipe 16 through a pipeline. The hot water enters the heating pipeline 20 from the water inlet pipe 16. The liquid LPG in the cavity of the lower housing 14 is heated by the hot water flowing rapidly in the heating pipeline 20 and becomes vaporized LPG after heating. It flows out through the air outlet pipe 2 and is transported as gaseous LPG to the outboard motor engine for combustion and continuous operation. When the hot water flowing in the heating pipeline 20 rises through the spiral pipeline 4, the outer wall exchanges heat with the liquid LPG. The water flow gradually spirals upward, the heat decreases, and it gradually flows out through the water outlet pipe 15 and is discharged into the water. As the machine continues to run, the water flow continuously exchanges heat with the liquid LPG through the heating pipeline, continuously vaporizing the liquid LPG into gaseous LPG. On the premise that the internal cavity pressure of the lower housing 14 is greater than or equal to 0.5 Mpa. The liquid LPG entering the evaporation device adjusts the amount of liquid LPG entering the evaporator through the float structure provided on the upper housing 13. When the liquid LPG in the cavity of the lower housing 14 reaches saturation, the float 6 floats upward and moves in a circular motion around the float valve 5. The valve needle 7 in contact with the float 6 moves axially upward at the gas outlet end of the LPG pipeline 1. The upper end of the valve needle 7 is completely hidden inside the LPG pipeline 1, blocking the LPG pipeline 1, and the liquid LPG cannot flow in; as more LPG evaporates, the float 6 moves in a circular motion around the float valve 5. The valve needle 7 in contact with the float 6 moves axially downward at the end of the LPG pipeline 1. The upper end of the valve needle 7 is exposed at the cut of the gas outlet end of the LPG pipeline 1. The valve needle 7 cannot completely block the LPG pipeline 1, and the liquid LPG flows in. This cycle repeats. There is always a certain amount of liquid LPG in the cavity of the lower housing 14; at the same time, the vaporized gaseous LPG passes through the coarse filter element 10, then through the fine filter element 9, filters out impurities, and transports the clean gas to the engine for combustion through the air outlet pipe 2. This cycle repeats, realizing the gasification process of the liquid gas. The continuous supply of gas to the engine is achieved.

Claims

1. An evaporation device for an outboard engine using liquefied petroleum gas, comprising a housing (17), characterized in that the housing (17) is divided into an upper housing (13) and a lower housing (14); a heating pipe (20) is provided in the internal cavity of the lower housing (14), the upper housing (13) is provided with an LPG pipe (1), the LPG pipe (1) communicates with the internal cavity of the lower housing (14), and a valve needle (7) is provided at the air outlet end; a float valve (5) is hinged to the upper housing (13), an extension is provided at the lower end of the float (6) close to the float valve (5), the end of the extension is hinged to the float valve (5), and the valve needle (7) abuts against the upper surface of the extension; a chute is provided on the LPG pipe (1) close to the outer surface of the lower housing (14), and the valve needle (7) is combined with the LPG pipe (1) in the axial direction through the chute.

2. An evaporation device for an outboard engine using liquefied petroleum gas according to claim 1, characterized in that the float (6) is in the shape of a frustum with a smaller upper part and a larger lower part.

3. An evaporation device for an outboard engine using liquefied petroleum gas according to claim 2, characterized in that the upper end of the valve needle (7) is provided with an inclined surface, the lower end is rod-shaped, and the end is round cake-shaped. The valve needle (7) is provided with a chute in the axial direction.

4. An evaporation device for an outboard engine using liquefied petroleum gas according to claim 1 or 2, characterized in that the upper housing (13) is provided with an air outlet pipe (2), the air outlet pipe (2) is arranged in the same vertical direction as the LPG pipe (1) and the float valve (5), and the order from top to bottom is: LPG pipe (1), air outlet pipe (2), and float valve (5).

5. An evaporation device for an outboard engine using liquefied petroleum gas according to claim 4, characterized in that the air outlet pipe (2) and the LPG pipe (1) are arranged on the same base (21).

6. An evaporation device for an outboard engine using liquefied petroleum gas according to claim 1, characterized in that the valve needle (7) is provided with a chute in the axial direction.

7. An evaporation device for an outboard engine using liquefied petroleum gas according to claim 1, characterized in that the upper housing (13) is provided with a water inlet pipe (16) and a water outlet pipe (15), the water inlet pipe (16) is connected to the water inlet of the heating pipe (20); the water outlet pipe (15), the water outlet pipe (15) is connected to the water outlet of the heating pipe (20).

8. An evaporation device for an outboard engine using liquefied petroleum gas according to claim 1, characterized in that a horizontally placed fine filter sheet (9) and a coarse filter sheet (10) are provided in the internal cavity of the upper housing (13), and the coarse filter sheet (10) is arranged below the fine filter sheet (9).

9. An evaporation device for an outboard engine using liquefied petroleum gas according to claim 8, characterized in that a cavity is formed between the coarse filter sheet (10) and the fine filter sheet (9) and the surrounding, and the cavity divides the internal cavity of the upper housing (13) into upper and lower parts, and the air outlet pipe (2) communicates with the upper part of the internal cavity of the upper housing (13).

10. An evaporation device for an outboard engine using liquefied petroleum gas according to claim 8, characterized in that A heating block (8) is provided at a position of the upper housing (13) close to the coarse filter (10). Protrusions are provided on the outer surface of the heating block (8), and the heating block (8) is screwed to the upper housing (13).

11. An evaporation device for a liquefied petroleum gas outboard engine according to claim 1, characterized in that the upper housing (13) is divided into a columnar housing (18) and an upper cover (19). A fixing protrusion (11) is provided at the upper end of the upper cover (19), and the columnar housing (18) is screwed to the upper cover (19).

12. An evaporation device for a liquefied petroleum gas outboard engine according to claim 1, characterized in that the heating pipe (20) is composed of a vertical pipe (3) and a spiral pipe (4), and the vertical pipe (3) and the spiral pipe (4) are connected at the bottom of the lower housing (14).

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