Automatic fuel switching structure of three-fuel generator unit

Abstract

The utility model is applicable to the technical field of generator sets, and provides an automatic fuel switching structure of a three-fuel generator set, which comprises a ventilation combination mechanism, a secondary pressure reducing valve is arranged on one side of the ventilation combination mechanism, the ventilation combination mechanism and the secondary pressure reducing valve are provided with first hoses, and the ventilation combination mechanism and the secondary pressure reducing valve are fixedly communicated through the first hoses. A carburetor is arranged on one side of the secondary pressure reducing valve, the carburetor and the secondary pressure reducing valve are fixedly communicated through a second hose, and a carburetor switch is installed on the carburetor. Three fuels can be freely switched through the ventilation combination mechanism, the two-stage pressure reducing valve is arranged to control the fuels with different combustion values to enter the cylinder head to be combusted in the optimal proportion of the fuels to air, the generator set with the three fuels of fuel oil, natural gas and liquefied petroleum gas is flexibly used, and the economical and environment-friendly requirements of the generator set are met.

Description

Technical Field

[0001] This utility model relates to the field of generator set technology, and in particular to an automatic fuel switching structure for a three-fuel generator set. Background Technology

[0002] In a generator set, the diesel engine's volume decreases while its temperature rises rapidly, reaching the diesel fuel's ignition point. The diesel fuel ignites, the air-fuel mixture burns violently, and the volume expands rapidly, pushing the piston downwards—this is called "work." Each cylinder performs work in a specific sequence, and the thrust acting on the piston is converted through the connecting rod into a force that drives the crankshaft to rotate. Utilizing the principle of 'electromagnetic induction,' the generator outputs an induced electromotive force, which generates current through a closed load circuit. This only describes the most basic working principle of the generator set. To obtain usable and stable power output, a series of diesel engine and generator control and protection devices and circuits are also required.

[0003] Existing generator sets cannot meet the needs of multi-fuel generator sets. With the development and application of clean energy natural gas, natural gas and liquefied petroleum gas are more economical and environmentally friendly than fuel oil. There is now a need for generator sets that can flexibly use fuel oil, natural gas and liquefied petroleum gas to meet the requirements of economical and environmentally friendly generator sets. Utility Model Content

[0004] This utility model provides an automatic fuel switching structure for a three-fuel generator set, aiming to solve the problem that the existing generator sets cannot meet the needs of multi-fuel generator sets. With the development and application of clean energy natural gas, natural gas and liquefied petroleum gas are more economical and environmentally friendly than fuel oil. There is a need for generator sets that can flexibly use fuel oil, natural gas and liquefied petroleum gas to meet the requirements of economic and environmental protection of generator sets.

[0005] This utility model is implemented as follows: an automatic fuel switching structure for a three-fuel generator set includes a gas exchange combination mechanism. A secondary pressure reducing valve is provided on one side of the gas exchange combination mechanism. The gas exchange combination mechanism and the secondary pressure reducing valve are provided with a first hose, and the two are fixedly connected through the first hose. A carburetor is provided on one side of the secondary pressure reducing valve. The carburetor and the secondary pressure reducing valve are fixedly connected through a second hose. A carburetor switch is installed on the carburetor.

[0006] Preferably, the ventilation assembly includes: a top cover of the assembly, a housing of the assembly detachably connected to the top cover, an air inlet pipe of the assembly at the top of the top cover, one end of the air inlet pipe of the assembly being fixedly connected to a first flexible hose, the air inlet pipe of the assembly extending through the top cover into the interior of the housing of the assembly, a return spring sleeved inside the housing of the housing, a micro switch trigger block sleeved below the return spring on the air inlet pipe of the assembly, a first micro switch installed on the top cover above the return spring, a second micro switch installed on the housing below the return spring, and a slot opened at the bottom of the housing of the assembly, through which the air inlet pipe of the assembly passes.

[0007] The beneficial effects of adopting the above-mentioned further solution are as follows: by setting up an air intake pipe for connecting the head and tail of the air intake connector, the tail is connected to the air intake nozzle of the pressure reducing valve through a hose; by setting up a second micro switch for controlling the on / off state of one of the solenoid valves at the outlet of the pressure reducing valve and the solenoid valve of the carburetor cup; by setting up a first micro switch for controlling the on / off state of one of the solenoid valves at the outlet of the pressure reducing valve and the change of the angle of the external igniter; by setting up a micro switch trigger block for triggering the micro switch trigger block to move up and down after the air intake connector is assembled in different states, thus activating the micro switch in different positions; and by setting up a return spring for returning the micro switch trigger block to its initial state after the air intake connector is disconnected.

[0008] Preferably, the secondary pressure reducing valve includes a valve body, on which a pressure reducing valve inlet is provided, the pressure reducing valve inlet being fixedly connected to the other end of the first hose, a pressure reducing valve outlet is provided on the side of the valve body away from the pressure reducing valve inlet, the pressure reducing valve outlet being fixedly connected to one end of the second hose, two sets of solenoid valves are provided on the side of the valve body near the pressure reducing valve outlet, and a pressure reducing valve inlet outlet is provided on the side of the valve body located at the pressure reducing valve inlet.

[0009] The beneficial effects of adopting the above-mentioned further solution are as follows: by setting an air outlet at the air inlet of the pressure reducing valve, it is used to connect to the carburetor diaphragm switch through a third hose, and the on / off state of the diaphragm switch is controlled by air pressure; by setting an air inlet of the pressure reducing valve, it is connected to the tail end of the air inlet pipe of the assembly through a first hose; by setting an air outlet of the pressure reducing valve, the two channels at the air outlet of the secondary pressure reducing valve converge and are connected to the carburetor air inlet through one air outlet; and by setting a solenoid valve, it is used to control the on / off state of the two channels at the air outlet of the pressure reducing valve.

[0010] Preferably, the carburetor includes: a carburetor body, a carburetor inlet nozzle on the carburetor body, the carburetor inlet nozzle being fixedly connected to the other end of a second hose, and a fuel inlet pipe located on one side of the carburetor inlet nozzle on the carburetor body.

[0011] Preferably, the carburetor switch is a diaphragm switch, and the valve body is provided with an air outlet at the air inlet of the pressure reducing valve on one side. A third hose is fixedly connected to the diaphragm switch, and the other end of the third hose opposite to the carburetor switch is fixedly connected to the air outlet at the air inlet of the pressure reducing valve.

[0012] The beneficial effect of adopting the above-mentioned further solution is that it facilitates the control of the carburetor switch operation by air pressure, thereby controlling whether the carburetor receives fuel.

[0013] Preferably, the carburetor switch is a solenoid valve switch, and the solenoid valve switch is electrically connected to the second micro switch.

[0014] Preferably, a liquefied gas inlet connector is fitted into the bottom slot of the assembly housing, and the liquefied gas inlet connector is connected to the assembly's air inlet pipe.

[0015] The beneficial effect of adopting the above-mentioned further solution is that liquefied gas can be introduced by connecting the gas exchange assembly through the liquefied gas inlet connector.

[0016] Preferably, a natural gas inlet connector is fitted into the bottom slot of the assembly housing, and the natural gas inlet connector is connected to the assembly's inlet pipe.

[0017] The beneficial effect of adopting the above-mentioned further solution is that natural gas can be introduced by connecting the gas exchange assembly through the natural gas inlet connector.

[0018] Compared with the prior art, the beneficial effects of this utility model are as follows: The automatic fuel switching structure of this utility model for a three-fuel generator set can freely switch between the three fuels by setting a gas exchange combination mechanism. By setting a two-stage pressure reducing valve, it controls the fuels with different calorific values ​​to enter the cylinder head for combustion in the optimal ratio with air. It can flexibly use three fuels: fuel oil, natural gas and liquefied petroleum gas, to meet the requirements of economic and environmental protection of generator sets. By setting a first micro switch and a second micro switch on the automatic switching structure, different air intake joints trigger micro switches or two-stage pressure reducing valves at different positions to increase the gas supply channels. Attached Figure Description

[0019] Figure 1 This is a schematic diagram of the structure of this utility model (electromagnetic valve switch);

[0020] Figure 2 for Figure 1 A schematic diagram of the side view structure;

[0021] Figure 3 for Figure 1 Schematic diagram of the ventilation combination mechanism;

[0022] Figure 4 for Figure 3 A schematic diagram of the side view structure;

[0023] Figure 5 for Figure 1 Schematic diagram of a two-stage pressure reducing valve;

[0024] Figure 6 This is a schematic diagram of the ventilation assembly mechanism (removal assembly housing) in Embodiment 1 of this utility model;

[0025] Figure 7 This is a schematic diagram of the ventilation combination mechanism (removal of the assembly housing) in Embodiments 2 and 4 of this utility model;

[0026] Figure 8 This is a schematic diagram of the ventilation combination mechanism (removing the assembly housing) in embodiments three and five of this utility model;

[0027] Figure 9 This is a schematic diagram of the structure of the present invention (diaphragm switch);

[0028] Figure 10 for Figure 9 A schematic diagram of the side view structure;

[0029] Figure 11 for Figure 9 Schematic diagram of the two-stage pressure reducing valve.

[0030] In the diagram: 1. Ventilation assembly; 11. Assembly top cover; 12. Assembly air inlet pipe; 13. Assembly housing; 14. Return spring; 15. Microswitch trigger block; 16. First microswitch; 17. Second microswitch; 2. Secondary pressure reducing valve; 21. Valve body; 22. Pressure reducing valve inlet; 23. Pressure reducing valve outlet; 24. Solenoid valve; 25. Pressure reducing valve outlet at the inlet end; 3. First hose; 4. Carburetor; 41. Carburetor body; 42. Carburetor inlet; 43. Fuel inlet pipe; 5. Second hose; 6. Carburetor switch; 7. Third hose; 8. Liquefied petroleum gas (LPG) inlet connector; 9. Natural gas (NPG) inlet connector. Detailed Implementation

[0031] To make the objectives, technical solutions, and advantages of this utility model clearer, the present utility model will be further described in detail below with reference to the accompanying drawings and embodiments. It should be understood that the specific embodiments described herein are merely illustrative of the present utility model and are not intended to limit the present utility model.

[0032] Example 1:

[0033] Please see Figure 1-6This utility model provides a technical solution for an automatic fuel switching structure for a three-fuel generator set: an automatic fuel switching structure for a three-fuel generator set includes: a gas exchange combination mechanism 1, a secondary pressure reducing valve 2 provided on one side of the gas exchange combination mechanism 1, a first hose 3 provided between the gas exchange combination mechanism 1 and the secondary pressure reducing valve 2, the two being fixedly connected through the first hose 3, a carburetor 4 provided on one side of the secondary pressure reducing valve 2, the carburetor 4 being fixedly connected to the secondary pressure reducing valve 2 through a second hose 5, and a carburetor switch 6 installed on the carburetor 4.

[0034] Furthermore, the ventilation assembly 1 includes: an assembly top cover 11, an assembly housing 13 detachably connected to the assembly top cover 11, an assembly air inlet pipe 12 provided at the top of the assembly top cover 11, the assembly air inlet pipe 12 being fixedly connected to one end of the first hose 3, the assembly air inlet pipe 12 extending through the assembly top cover 11 into the interior of the assembly housing 13, a reset spring 14 sleeved inside the assembly housing 13, a micro switch trigger block 15 sleeved below the reset spring 14, a first micro switch 16 installed on the upper side of the assembly top cover 11 above the reset spring 14, a second micro switch 17 installed on the lower side of the assembly housing 13 below the reset spring 14, and a slot provided at the bottom of the assembly housing 13 through which the assembly air inlet pipe 12 passes.

[0035] Typically, the secondary pressure reducing valve 2 includes a valve body 21, on which a pressure reducing valve inlet 22 is provided. The pressure reducing valve inlet 22 is fixedly connected to the other end of the first hose 3. A pressure reducing valve outlet 23 is provided on the side of the valve body 21 away from the pressure reducing valve inlet 22. The pressure reducing valve outlet 23 is fixedly connected to one end of the second hose 5. Two sets of solenoid valves 24 are provided on the side of the valve body 21 near the pressure reducing valve outlet 23. An outlet 25 at the pressure reducing valve inlet end is provided on the side of the valve body 21 located at the pressure reducing valve inlet 22.

[0036] Specifically, the carburetor 4 includes: a carburetor body 41, a carburetor intake nozzle 42 on the carburetor body 41, the carburetor intake nozzle 42 being fixedly connected to the other end of the second hose 5, and a fuel inlet pipe 43 being provided on one side of the carburetor body 41 located at the carburetor intake nozzle 42.

[0037] In this embodiment: the secondary pressure reducing valve 2 is internally configured with two channels, each channel is equipped with a solenoid valve 24 to control the opening and closing of the channel. After the two channels merge, they are connected to the carburetor 4 through the pressure reducing valve outlet 23. A carburetor switch 6 is configured at the fuel cup of the carburetor 4 to control the opening and closing of the fuel passage of the carburetor 4. The second micro switch 17 and the first micro switch 16 are electrically connected to the two sets of solenoid valves 24 respectively. The second micro switch 17 and the first micro switch 16 control the opening and closing of the two solenoid valves 24 on the secondary pressure reducing valve 2 respectively.

[0038] When the air intake connector is not connected to the generator set, as shown in the attached... Figure 6 As shown, when the microswitch trigger block 15 does not contact the two microswitches above, the two channels of the secondary pressure reducing valve 2 are closed, the carburetor 4 solenoid valve is open, and fuel is introduced from the external fuel tank through the fuel inlet pipe 43. At this time, the fuel is in use.

[0039] Example 2:

[0040] Based on Example 1, please refer to Figure 7 A liquefied gas inlet connector 8 is fitted into the bottom slot of the assembly housing 13. The liquefied gas inlet connector 8 is connected to the assembly air inlet pipe 12. The carburetor solenoid valve 6 is a solenoid valve switch, which is electrically connected to the second micro switch 17.

[0041] In this embodiment: when the LPG inlet connector 8 is connected to the air exchange assembly 1, the micro switch trigger block 15 is pushed upward and contacts the second micro switch 17. Since the second micro switch 17 is electrically connected to one of the solenoid valves 24 on the secondary pressure reducing valve 2, one of the solenoid valves 24 at the outlet of the secondary pressure reducing valve 2 is activated, opening the gas passage and providing LPG fuel to the generator set. At the same time, the solenoid valve switch on the carburetor 4 is triggered by the second micro switch 17 to activate the solenoid valve switch, thereby closing the fuel passage and stopping the fuel inlet pipe 43 from providing fuel to the generator set. At this time, it is in LPG usage mode.

[0042] Example 3:

[0043] Based on Example 1, please refer to Figure 8 A natural gas inlet connector 9 is fitted into the bottom slot of the assembly housing 13. The natural gas inlet connector 9 is connected to the inlet pipe 12 of the assembly. The carburetor solenoid valve 6 is a solenoid valve switch, which is electrically connected to the second micro switch 17.

[0044] In this embodiment: when the natural gas inlet connector 9 is connected to the gas exchange assembly 1, the top of the natural gas inlet connector 9 is higher than the top of the liquefied gas inlet connector 8. The micro switch trigger block 15 is pushed upward, simultaneously contacting the second micro switch 17 and the first micro switch 16, triggering the opening and closing of the two solenoid valves 24 on the outlet of the secondary pressure reducing valve 2. At the same time, the micro switch controlling the ignition angle of the external igniter is activated, causing the two solenoid valves 24 at the outlet of the pressure reducing valve 2 to operate, opening the two gas passages simultaneously to provide fuel to the generator set. Simultaneously, the carburetor solenoid valve 6 on the carburetor 4 is activated by the second micro switch 17, thereby closing the fuel passage and stopping the fuel supply pipe 43 from providing fuel to the generator set. The external igniter micro switch is electrically connected to the first micro switch 16. When the first micro switch 16 is open, it controls the change in the ignition angle of the external igniter, allowing the power to operate in the optimal state, which is the natural gas usage state.

[0045] Example 4:

[0046] Based on Example 1, please refer to Figure 7 A liquefied petroleum gas (LPG) inlet connector 8 is fitted into the bottom slot of the assembly housing 13. The LPG inlet connector 8 is connected to the assembly's air inlet pipe 12. When the carburetor switch 6 is a diaphragm switch, please refer to [reference needed]. Figure 9-11 The pressure reducing valve 2 of the secondary pressure reducing valve 2 is equipped with a pressure reducing valve inlet nozzle 22 and an outlet nozzle 25 at the inlet end of the pressure reducing valve, which is connected to a diaphragm switch through a third hose 7. The carburetor body 41 is equipped with a carburetor inlet nozzle 42 and is connected to the pressure reducing valve outlet nozzle 23 of the secondary pressure reducing valve 2 through a second hose 5. A diaphragm switch is configured at the fuel cup of the carburetor 4 to control the opening and closing of the fuel passage of the carburetor 4.

[0047] In this embodiment: when the LPG inlet connector 8 is connected to the air exchange assembly 1, the micro switch trigger block 15 is pushed upward and contacts the second micro switch 17. Since the second micro switch 17 is electrically connected to one of the solenoid valves 24 on the secondary pressure reducing valve 2, one of the solenoid valves 24 at the outlet of the secondary pressure reducing valve 2 is activated, opening the gas passage and providing LPG fuel to the generator set. At the same time, the carburetor switch 6 on the carburetor 4 is connected to the outlet nozzle 25 at the inlet of the pressure reducing valve through the third hose 7. Due to the air intake of the third hose 7, the air pressure at the carburetor switch 6 increases, thereby closing the fuel passage and stopping the fuel inlet pipe 43 from providing fuel to the generator set. At this time, it is the LPG usage state.

[0048] Example 5:

[0049] Based on Example 1, please refer to Figure 8A natural gas inlet connector 9 is fitted into the bottom slot of the assembly housing 13. The natural gas inlet connector 9 is connected to the assembly inlet pipe 12. When the carburetor switch 6 is a diaphragm switch, please refer to [reference needed]. Figure 9-11 The pressure reducing valve 2 of the secondary pressure reducing valve 2 is equipped with a pressure reducing valve inlet nozzle 22 and an outlet nozzle 25 at the inlet end of the pressure reducing valve, which is connected to a diaphragm switch through a third hose 7. The carburetor body 41 is equipped with a carburetor inlet nozzle 42 and is connected to the pressure reducing valve outlet nozzle 23 of the secondary pressure reducing valve 2 through a second hose 5. A diaphragm switch is configured at the fuel cup of the carburetor 4 to control the opening and closing of the fuel passage of the carburetor 4.

[0050] In this embodiment: when the natural gas inlet connector 9 is connected to the gas exchange assembly 1, the top of the natural gas inlet connector 9 is higher than the top of the liquefied gas inlet connector 8. The micro switch trigger block 15 is pushed upward, simultaneously contacting the second micro switch 17 and the first micro switch 16, triggering the opening and closing of the two solenoid valves 24 on the outlet of the secondary pressure reducing valve 2. At the same time, it controls the micro switch of the ignition angle of the external igniter, causing the two solenoid valves 24 at the outlet of the pressure reducing valve 2 to operate, thus simultaneously opening the two gas passages and providing fuel to the generator set. Simultaneously, the diaphragm switch on the carburetor 4 is connected to the air outlet 25 at the air inlet of the pressure reducing valve through the third hose 7. Due to the air intake of the third hose 7, the air pressure at the diaphragm switch increases, thereby closing the fuel passage and stopping the fuel inlet pipe 43 from supplying fuel to the generator set. The external igniter micro switch is electrically connected to the first micro switch 16. When the first micro switch 16 is open, it controls the ignition angle of the external igniter to change, so that the power operates in the optimal state. At this time, it is in the natural gas usage state.

[0051] The above description is only a preferred embodiment of the present utility model and is not intended to limit the present utility model. Any modifications, equivalent substitutions and improvements made within the spirit and principles of the present utility model should be included within the protection scope of the present utility model.

Claims

1. An automatic fuel switching structure for a three-fuel generator set, characterized in that, include: A ventilation combination mechanism (1) is provided with a secondary pressure reducing valve (2) on one side. The ventilation combination mechanism (1) and the secondary pressure reducing valve (2) are provided with a first hose (3), and the two are fixedly connected through the first hose (3). A carburetor (4) is provided on one side of the secondary pressure reducing valve (2). The carburetor (4) and the secondary pressure reducing valve (2) are fixedly connected through a second hose (5). A carburetor switch (6) is installed on the carburetor (4).

2. The automatic fuel switching structure for a three-fuel generator set according to claim 1, characterized in that: The ventilation assembly (1) includes: an assembly top cover (11), on which an assembly housing (13) is detachably connected; an assembly air inlet pipe (12) is provided at the top of the assembly top cover (11); the assembly air inlet pipe (12) is fixedly connected to one end of a first flexible hose (3); the assembly air inlet pipe (12) extends through the assembly top cover (11) into the interior of the assembly housing (13); and the assembly air inlet pipe (12) is located inside the assembly housing (13). A reset spring (14) is fitted on the assembly. The air inlet pipe (12) of the assembly is fitted with a micro switch trigger block (15) below the reset spring (14). The top cover (11) of the assembly is fitted with a first micro switch (16) on the upper side of the reset spring (14). The housing (13) of the assembly is fitted with a second micro switch (17) on the lower side of the reset spring (14). The bottom of the housing (13) of the assembly has a slot, through which the air inlet pipe (12) of the assembly passes.

3. The automatic fuel switching structure for a three-fuel generator set according to claim 2, characterized in that: The secondary pressure reducing valve (2) includes a valve body (21), on which a pressure reducing valve inlet (22) is provided. The pressure reducing valve inlet (22) is fixedly connected to the other end of the first hose (3). A pressure reducing valve outlet (23) is provided on the side of the valve body (21) away from the pressure reducing valve inlet (22). The pressure reducing valve outlet (23) is fixedly connected to one end of the second hose (5). Two sets of solenoid valves (24) are provided on the side of the valve body (21) near the pressure reducing valve outlet (23).

4. The automatic fuel switching structure for a three-fuel generator set according to claim 3, characterized in that: The carburetor (4) includes: a carburetor body (41), on which a carburetor inlet nozzle (42) is provided, the carburetor inlet nozzle (42) is fixedly connected to the other end of the second hose (5), and a fuel feed pipe (43) is provided on one side of the carburetor body (41) located at the carburetor inlet nozzle (42).

5. The automatic fuel switching structure for a three-fuel generator set according to claim 4, characterized in that: The carburetor switch (6) is a diaphragm switch. The valve body (21) is located on one side of the pressure reducing valve inlet (22) and has an outlet (25) at the pressure reducing valve inlet. A third hose (7) is fixedly connected to the diaphragm switch. The other end of the third hose (7) away from the carburetor switch (6) is fixedly connected to the outlet (25) at the pressure reducing valve inlet.

6. The automatic fuel switching structure for a three-fuel generator set according to claim 4, characterized in that: The carburetor switch (6) is a solenoid valve switch, which is electrically connected to the second micro switch (17).

7. The automatic fuel switching structure for a three-fuel generator set according to claim 4, characterized in that: A liquefied gas inlet connector (8) is fitted into the bottom slot of the assembly housing (13), and the liquefied gas inlet connector (8) is connected to the assembly inlet pipe (12).

8. The automatic fuel switching structure for a three-fuel generator set according to claim 4, characterized in that: A natural gas inlet connector (9) is fitted into the bottom slot of the assembly housing (13), and the natural gas inlet connector (9) is connected to the assembly inlet pipe (12).

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