Fuel switching switch for dual fuel generator and dual fuel generator set

Abstract

The application discloses a fuel switching switch of a dual-fuel generator, which comprises a gas female connector, a gas male connector, a support, a micro switch, a trigger and an elastic member. The gas male connector is arranged on the support. The micro switch is arranged on the support. The trigger is arranged on the support and has an initial position and a trigger position. The trigger is in linkage with the micro switch and the gas female connector respectively. The elastic member is used for resetting the trigger to the initial position. The gas male connector, the micro switch and the trigger are integrated on the support, so that the micro switch can be triggered when the trigger is in the trigger position during the process of inserting or pulling out the gas female connector, fuel switching is directly realized, the operation is more convenient, the overall structure is more simple, and the switching is more smooth.

Description

Technical Field

[0001] This utility model relates to the technical field of dual-fuel generator sets, and specifically to a fuel switching mechanism. Background Technology

[0002] The fuel switching mechanism of a dual-fuel generator is mainly used to achieve rapid switching between fuel oil and natural gas. The switching mechanism mainly includes a female gas pipe connector, a male gas pipe connector, a trigger, and a microswitch. The male and female gas pipe connectors are connected by a plug-in connection, and the microswitch is connected to the fuel control valve. In the current design, when the male gas pipe connector is inserted into the female gas pipe connector, the trigger activates the microswitch, which then disconnects the fuel line via the fuel solenoid valve controller, thus switching from fuel oil to natural gas. When the male and female gas pipe connectors are separated, the trigger also separates from the microswitch along with the male gas pipe connector, thus switching back to fuel oil.

[0003] Existing triggers are usually designed on the male connector. When connecting the male and female gas pipe connectors, the triggers need to be aligned with the micro switch. This means that the male and female gas pipe connectors only have one compatible installation position. If the triggers are not aligned with the micro switch, the switching purpose cannot be achieved. Therefore, the convenience and practicality of operating the switching mechanism are greatly reduced. Utility Model Content

[0004] The purpose of this application is to provide a fuel switching switch for a dual-fuel generator, including a gas female connector and a gas male connector, characterized in that it includes: a bracket, wherein the gas male connector is disposed on the bracket; a micro switch, disposed on the bracket; a trigger element, disposed on the bracket, wherein the trigger element has an initial position and a trigger position, and the trigger element is respectively linked and cooperated with the micro switch and the gas female connector; and an elastic element, which is used to reset the trigger element to the initial position.

[0005] Optionally, the elastic element is a return spring, which is used to apply a tendency to move the trigger away from the micro switch.

[0006] Optionally, the bracket is provided with a protruding post, and the elastic element and the trigger element are sequentially sleeved on the protruding post.

[0007] Optionally, the elastic element is a torsion spring, which is used to apply a tendency to move the trigger toward the micro switch.

[0008] Optionally, the trigger includes a cylindrical body, one end of which is provided with a first contact plate and a second contact plate radially symmetrically distributed.

[0009] The first contact plate is linked with the gas female connector, and the second contact plate is linked with the micro switch.

[0010] Optionally, the torsion spring is sleeved on the cylindrical body, and one end of the torsion spring is fixed to the second contact plate. The torsion spring exerts a tendency on the second contact plate to move toward the micro switch.

[0011] Optionally, the trigger further includes a rotating column, and the cylindrical body is detachably connected to the rotating column; the torsion spring is sleeved on the rotating column, and one end of the torsion spring is fixed to the second contact plate, and the torsion spring exerts a tendency on the second contact plate to move toward the micro switch.

[0012] This application also discloses a dual-fuel generator set, including a fuel switching switch for any of the dual-fuel generators described above, and a fuel control valve. When the trigger is in the trigger position, the micro switch sends a signal to close the fuel control valve.

[0013] Optionally, it also includes a control module, wherein when the trigger is in the trigger position, the micro switch sends a signal to the control module, and the control module controls the fuel control valve to close after receiving the signal.

[0014] Optionally, it may also include a frequency converter, with the control module located inside the frequency converter.

[0015] The beneficial effects of this utility model include at least one of the following: by integrating the gas male connector, micro switch, and trigger on the bracket, the micro switch can be triggered when the trigger is in the trigger position during the insertion or removal of the gas female connector, thereby directly realizing fuel switching. Therefore, the operation is more convenient, the overall structure is simpler, and the switching is smoother. Attached Figure Description

[0016] Figure 1 is a schematic diagram of the structure of the first embodiment of this application.

[0017] Figure 2 is a structural schematic diagram of the second embodiment of this application.

[0018] Figure 3 is a partial structural schematic diagram of Figure 2.

[0019] Figure 4 is a cross-sectional view of Figure 2.

[0020] Explanation of reference numerals in the attached figures:

[0021] Gas female connector 1, panel 2, micro switch 3, contact 31, trigger 4, first contact plate 41

[0022] Second contact plate 42, reset spring 5, gas male connector 6, bracket 7, nut 8, torsion spring 9. Detailed Implementation

[0023] The following specific examples illustrate the implementation of this utility model. Those skilled in the art can easily understand other advantages and effects of this utility model from the content disclosed in this specification. This utility model can also be implemented or applied through other different specific embodiments, and various details in this specification can also be modified or changed based on different viewpoints and applications without departing from the spirit of this utility model.

[0024] The present invention will be further described in detail below with reference to Figures 1-4.

[0025] As shown in Figure 1, the purpose of this application is to provide a fuel switching switch for a dual-fuel generator, including a gas female connector 1, a gas male connector 6, and a bracket 7. The bracket 7 is mounted on the panel 2 of the dual-fuel generator set and located inside the dual-fuel generator set. The gas male connector 6 is mounted on the bracket 7 and fixed to the bracket 7 by a nut 8. A micro switch 3, used for sending signals, is detachably mounted on the bracket 7. A trigger 4 is mounted on the bracket 7 and has an initial position and a triggered position, and the trigger 4 is linked and cooperates with the micro switch 3 and the gas female connector 1 respectively. An elastic element is used to reset the trigger 4 to the initial position. (Bracket 7, micro switch 3, ...)

[0026] The trigger element 4 and other components are arranged behind the panel 2. By integrating the gas male connector 6, micro switch 3, and trigger element 4 onto the bracket 7, the micro switch 3 can be triggered when the gas female connector 1 is in the trigger position during insertion or removal, thus directly achieving fuel switching. On the one hand, there is no need to design other trigger structures on the gas female connector 1 to cooperate with the contact piece 31; on the other hand, there is no need to adjust the insertion position of the gas male connector 6 during insertion. Thus, gas switching can be achieved simultaneously with the connection between the gas male connector 6 and the gas female connector 1, making operation more convenient, the overall structure simpler, and the switching smoother. It should be noted that the snap-fit ​​structure of the gas female connector 1 and the gas male connector 6 is existing technology and will not be described in detail here.

[0027] It should be noted that the micro switch 3 is detachably mounted on the bracket 7. The micro switch 3 has a contact 31, which is an elastic piece. The micro switch 3 switches the signal by pressing or releasing the contact 31. The micro switch 3 is existing technology and will not be described in detail here.

[0028] As shown in Figure 1-2, the elastic element is a return spring 5, which is used to apply a tendency to move the trigger element away from the micro switch; the bracket 7 is installed on the housing of the generator set, and a protrusion is fixed on the bracket 7. The return spring 5 and the trigger element 4 are sequentially sleeved on the protrusion.

[0029] Before the gas female connector 1 is inserted into the gas male connector 6, the trigger 4 is in the initial position, and the contact 31 of the micro switch 3 is in the open state. At this time, the dual-fuel generator set is in fuel mode. When the gas female connector 1 is inserted into the gas male connector 6, the gas female connector 1 pushes the trigger 4 towards the micro switch 3 and abuts against the contact 31 of the micro switch 3, thereby pressing the contact 31 against the micro switch 3 and locking the gas female connector 1 and the gas male connector 6. At this time, the trigger 4 is in the triggered position. When the trigger 4 is in the triggered position, the micro switch 3 is locked. At this time, the micro switch 3 sends a signal to directly or indirectly control the fuel control valve to close, thereby switching the dual-fuel generator set from fuel mode to gas mode. When the gas female connector 1 is pulled out of the gas male connector 6, the locking state is released. Since the return spring 5 always applies a tendency to move the trigger 4 away from the micro switch 3, the trigger 4... When the device is reset to its initial position, the trigger 4 disconnects from the contact 31 of the micro switch 3 under the action of the reset spring 5. When the contact 31 of the micro switch 3 returns to the open state, the micro switch 3 sends a signal to directly or indirectly control the fuel control valve to open, thereby realizing the dual-fuel generator set switching from gas mode to fuel mode.

[0030] As shown in Figures 2-4, this application discloses another embodiment. Unlike the first embodiment, in this embodiment, the elastic element is a torsion spring 9, which applies a tendency to move the trigger 4 towards the micro switch 3. The trigger 4 is rotatably mounted on the bracket 7 and is linked with both the micro switch 3 and the gas connector 1. The trigger 4 includes a cylindrical body, one end of which is provided with a radially symmetrically distributed first contact plate 441 and second contact plate 442. The first contact plate 441 is linked with the gas connector 1, and the second contact plate 442 is linked with the micro switch 3.

[0031] Optionally, the trigger 4 is rotatably mounted on the bracket 7 via a cylindrical body, and the torsion spring 9 is sleeved on the cylindrical body, with one end of the torsion spring fixed to the first contact plate 41. The micro switch 3 is located on one side of the second contact plate 42 of the trigger 4. The bracket 7 is provided with a notch or groove for the second contact plate 42 to pass through, so that the first contact plate 41 of the trigger 4 is located inside the bracket 7, and the second contact plate 42 is in direct contact with the micro switch 3.

[0032] Optionally, the trigger also includes a rotating column, with a cylindrical body detachably connected to the rotating column. The trigger is rotatably mounted on the bracket 7 via the rotating column. A torsion spring 9 is sleeved on the rotating column, and one end of the torsion spring 9 is fixed on the second contact plate 42. The torsion spring 9 applies a tendency to move the second contact plate 42 toward the micro switch 3.

[0033] Before the gas female connector 1 is inserted into the gas male connector 6, the trigger 4 is in its initial position, i.e., the second contact plate 42 is directly in contact with the micro switch 3, and the contact piece 31 of the micro switch 3 is in the connected state. At this time, the dual-fuel generator set is in fuel mode. When the gas female connector 1 is inserted into the gas male connector 6, the gas female connector 1 pushes the first contact plate 41 of the trigger 4 to move into the dual-fuel generator set. At this time, the second contact plate 42 of the trigger 4 moves away from the micro switch 3, causing the contact piece 31 of the micro switch 3 to disconnect, thus achieving the engagement of the gas female connector 1 and the gas male connector 6. At this time, the trigger 4 is in the triggered position. When the trigger 4 is in the triggered position, the contact piece 31 of the micro switch 3 is disconnected. At this time, the micro switch 3 sends a signal to directly or indirectly control the fuel control valve to close, thereby realizing the switching of the dual-fuel generator set from fuel mode to gas mode. When the gas female connector 1 is inserted into the gas male connector 6... During the pulling process, the locking state is released. Since one end of the torsion spring 9 is set on the second contact plate 42 of the trigger 4, and always applies a tendency to move towards the micro switch 3 to make the trigger 4 reset from the trigger position to the initial position. When the trigger 4 is reset to the initial position, the trigger 4 contacts the contact piece 31 of the micro switch 3 under the action of the torsion spring 9, so that the contact piece 31 of the micro switch 3 is blocked. When the contact piece 31 of the micro switch 3 is blocked, it sends a signal to directly or indirectly control the fuel control valve to open, thereby realizing the dual-fuel generator set switching from gas mode to fuel mode.

[0034] This application also discloses a dual-fuel generator set, including a fuel switching switch for any of the dual-fuel generators described above, and a fuel control valve. When the trigger 4 is in the trigger position and triggers the micro switch 3, the micro switch 3 sends a signal to the fuel control valve. After receiving the signal from the micro switch, the control module switches to the closed state. The fuel control valve is normally open. During the engagement process between the gas female connector 1 and the gas male connector 6, i.e., during the insertion of the gas female connector 1 into the gas male connector 6, the gas female connector 1 applies a tendency to move towards the micro switch 3 to the trigger 4, causing the contact 31 of the micro switch 3 to connect, or the gas female connector 1 applies a tendency to move away from the micro switch 3 to the trigger 4, causing the trigger 4 to move from the initial position to the trigger position. When the trigger 4 is in the trigger position, it triggers the contact 31 of the micro switch 3 to disconnect or connect. At this time, the micro switch 3 sends a signal to the fuel control valve. After receiving the signal from the micro switch, the control module switches to the closed state, thereby realizing the switching of the dual-fuel generator set from fuel state to gas state.

[0035] Optionally, a control module may also be included. When the trigger 4 is in the trigger position and triggers the microswitch 3, the microswitch 3 sends a signal to the control module. Upon receiving the signal, the control module controls the fuel control valve to close. The fuel control valve is normally open. During the engagement process between the gas female connector 1 and the gas male connector 6 (i.e., during the insertion of the gas female connector 1 into the gas male connector 6), the gas female connector 1 applies a tendency to move the trigger 4 towards the microswitch 3, causing the contact 31 of the microswitch 3 to connect, or the gas female connector 1 applies a tendency to move the trigger 4 away from the microswitch 3, causing the trigger 4 to move from its initial position to the trigger position. When the trigger 4 is in the trigger position, it triggers the contact 31 of the microswitch 3 to disconnect or connect. At this time, the microswitch 3 sends a signal to the control module. Upon receiving the signal from the microswitch, the control module controls the fuel control valve to close, thereby enabling the dual-fuel generator set to switch from fuel oil to gas.

[0036] Optionally, it may also include a frequency converter. When the dual-fuel generator set is a frequency converter generator set, the above-mentioned control module is set inside the frequency converter or integrated with the frequency converter. When the trigger 4 is in the trigger position and triggers the micro switch 3, the micro switch 3 sends a signal to the frequency converter. After receiving the signal, the frequency converter controls the fuel control valve to close. When the fuel control valve is normally open, during the engagement process between the gas female connector 1 and the gas male connector 6 (i.e., during the insertion of the gas female connector 1 into the gas male connector 6), the gas female connector 1 applies a tendency to move towards the micro switch 3 to the trigger element 4, causing the contact 31 of the micro switch 3 to connect, or the gas female connector 1 applies a tendency to move away from the micro switch 3 to the trigger element 4, causing 4 to move from the initial position to the trigger position. When the trigger element 4 is in the trigger position, it triggers the contact 31 of the micro switch 3 to disconnect or connect. At this time, the micro switch 3 sends a signal to the frequency converter. After receiving the signal sent by the micro switch, the frequency converter controls the fuel control valve to close, thereby realizing the switching of the dual-fuel generator set from fuel oil state to gas state.

[0037] Finally, it should be noted that the above embodiments are only used to illustrate the technical solutions of this utility model and are not intended to limit it. Although this utility model has been described in detail with reference to preferred embodiments, those skilled in the art should understand that modifications or equivalent substitutions can be made to the technical solutions of this utility model without departing from the spirit and scope of the technical solutions of this utility model, and all such modifications or substitutions should be covered within the scope of the claims of this utility model.

Claims

1. A fuel switching switch for a dual-fuel generator, comprising a gas female connector and a gas male connector, characterized in that, include: The gas connector is mounted on the bracket. A micro switch is mounted on the bracket; A trigger element is disposed on the bracket. The trigger element has an initial position and a trigger position. The trigger element includes a cylindrical body. One end of the cylindrical body is provided with a first contact plate and a second contact plate that are radially symmetrically distributed. The first contact plate is linked to the gas female connector, and the second contact plate is linked to the micro switch. An elastic element, which is used to reset the trigger element to its initial position, is a torsion spring, which is used to apply a tendency to move the trigger element toward the micro switch.

2. The fuel switching switch for the dual-fuel generator according to claim 1, characterized in that, The torsion spring is sleeved on the cylindrical body, and one end of the torsion spring is fixed to the second contact plate. The torsion spring exerts a tendency on the second contact plate to move toward the micro switch.

3. The fuel switching switch for the dual-fuel generator according to claim 1, characterized in that, The trigger also includes a rotating column, and the cylindrical body is detachably connected to the rotating column; the torsion spring is sleeved on the rotating column, and one end of the torsion spring is fixed to the second contact plate, and the torsion spring exerts a tendency on the second contact plate to move toward the micro switch.

4. A dual-fuel generator set, characterized in that, The fuel switching switch of the dual-fuel generator according to any one of claims 1-3 further includes a fuel control valve, wherein when the trigger is in the trigger position, the micro switch sends a signal to close the fuel control valve.

5. The dual-fuel generator set according to claim 4, characterized in that, It also includes a control module. When the trigger is in the trigger position, the micro switch sends a signal to the control module. After receiving the signal, the control module controls the fuel control valve to close.

6. The dual-fuel generator set according to claim 5, characterized in that, It also includes a frequency converter, and the control module is located inside the frequency converter.

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