A dual-fuel generator with an automatic oil-gas switching system

Abstract

The present invention relates to a dual-fuel generator with an oil and gas automatic switching system, comprising a housing, an oil circuit assembly, a power system and a dual-fuel automatic switching system, wherein the dual-fuel automatic switching system comprises a gas valve, a switch and a solenoid valve, wherein the gas valve is provided with a gas input port and two gas output ports, the front end of the gas input port of the gas valve passes through the housing and is located outside the housing, a gas output port of the gas valve is connected to the switch input port through a first pipeline, the switch output port is electrically connected to the solenoid valve, an oil circuit inlet end and a gas circuit inlet end are provided on the solenoid valve, another gas output port of the gas valve is connected to the gas circuit inlet end of the solenoid valve through a second pipeline, the oil circuit assembly is connected to the oil circuit inlet end of the solenoid valve, the gas input port of the gas valve is connected to an external gas assembly, and the solenoid valve output port is connected to the power system through a fuel channel. The generator is energy-saving and environmentally friendly.

Description

Technical Field

[0001] The invention relates to the technical field of generators, and in particular to a dual-fuel generator with an oil-gas automatic switching system. Background Art

[0002] Generators convert other forms of energy into electrical energy Mechanical equipment , widely used in the manufacturing industry. With the innovation of science and technology, dual-fuel generators are widely used. Dual-fuel engines can use gas and fuel as fuel. They have the advantages of gas generators being economical and environmentally friendly, and can be driven by fuel. Currently, dual-fuel generators or dual-fuel vehicle-mounted generators on the market need to switch between gas and fuel by switching buttons or clicking on the control panel. They do not have automatic fuel switching, and the operation is cumbersome. At the same time, they cannot achieve short-term switching between fuel and gas. Summary of the invention

[0003] In view of the shortcomings of the background technology, the technical problem to be solved by the present invention is to provide a dual-fuel automatic switching system, as well as a dual-fuel generator and a dual-fuel vehicle-mounted generator based on the dual-fuel automatic switching system. The system not only realizes automatic switching of dual fuels, but also switches in a short time, ensuring gas priority and achieving energy saving and environmental protection.

[0004] The present invention is completed by adopting the following technical scheme: a dual-fuel generator with an oil and gas automatic switching system, comprising a shell, an oil circuit component, a power system and a dual-fuel automatic switching system, wherein the oil circuit component, the power system and the dual-fuel automatic switching system are placed in the shell, and the dual-fuel automatic switching system comprises a gas valve, a switch and a solenoid valve, wherein the gas valve is provided with a gas input port and two gas output ports, the front end of the gas input port of the gas valve passes through the shell and is located outside the shell, a gas output port of the gas valve is connected to the switch input port through a first pipeline, the switch output port is electrically connected to the solenoid valve, an oil circuit inlet end and a gas circuit inlet end are provided on the solenoid valve, another gas output port of the gas valve is connected to the gas circuit inlet end of the solenoid valve through a second pipeline, the oil circuit component is connected to the oil circuit inlet end of the solenoid valve, the gas input port of the gas valve is connected to an external gas component, and the output port of the solenoid valve is connected to the power system through a fuel channel.

[0005] When the gas enters the gas valve, the gas valve receives the gas pressure and drives the switch to be in the on state through the first pipeline. The power generated by the switch being turned on is transmitted to the solenoid valve. The solenoid valve receives the electrical signal to close the valve at the oil channel. The gas is transmitted from the gas valve to the gas channel inlet through the second pipeline to form a gas path, which is in the gas supply state. When the gas stops entering the gas valve, the gas valve does not receive the gas pressure, the switch automatically cuts off the power supply, the switch output port is in the power-off state, the solenoid valve does not receive the power signal and is in the non-working state, and the oil circuit valve automatically opens to form an oil circuit, which is in the fuel supply state.

[0006] Furthermore, a fuel channel is arranged in the solenoid valve, and the fuel channel is provided with an output port. Both the gas circuit inlet end and the oil circuit inlet end are connected to the fuel channel. A valve is arranged between the oil circuit inlet end and the fuel channel. When the solenoid valve receives a power signal from the switch, the solenoid valve drives the valve to close, so that the oil circuit is closed.

[0007] Furthermore, the switch is a pneumatic switch, which consists of a switch seat and a micro switch. The micro switch is installed at one end of the switch seat, and an input port is provided at the other end of the switch seat. The first pipeline is connected to the input port. When the gas enters through the first pipeline and the input port and the gas pressure reaches the triggering pressure, the micro switch is in a conducting state under the action of the gas pressure.

[0008] Furthermore, a positive DC output port and a negative DC output port are provided on the shell, the inner sides of the positive DC output port and the negative DC output port are connected to the power system, and the battery pack is connected to the positive DC output port and the negative DC output port respectively through wires.

[0009] Furthermore, the micro switch is provided with a switch button and a metal conductive end, and a moving contact and a static contact are arranged inside the micro switch. The moving contact can contact or disconnect with the static contact under the drive of the switch button to realize the conduction or disconnection of the micro switch.

[0010] Furthermore, an air intake inner tube is provided in the switch seat, the switch button of the micro switch is against the inner port of the air intake inner tube, the outer port of the air intake inner tube is the input port of the gas, and the lower end of the switch seat is threadedly connected with a joint locking screw and a pipe fixing nut, and the first pipe is sleeved on the air intake inner tube and locked on the switch seat through the pipe fixing nut.

[0011] In the present invention, when the gas pressure switch receives the pressure from the gas valve, the gas pressure switch is driven to be in the on state under the action of the gas pressure, the power signal is transmitted to the solenoid valve through the wire, the solenoid valve core is closed, the oil circuit is in the closed state, and the gas is preferentially supplied to the generator to work; when the gas pressure is insufficient, the gas pressure switch automatically cuts off the power supply, the solenoid valve is powered off and does not work, the solenoid valve core is automatically opened, the oil circuit resumes working, and the fuel is supplied to the generator to work. The entire automatic switching process of the fuel is completed within 1-3 seconds, realizing a short-time automatic switching, and when there is gas fuel, gas fuel is preferentially used, which is energy-saving and environmentally friendly. BRIEF DESCRIPTION OF THE DRAWINGS

[0012] Figure 1 It is a structural schematic diagram of a dual-fuel automatic switching system;

[0013] Figure 2 It is a working flow chart of a dual fuel automatic switching system;

[0014] Figure 3 It is a structural schematic diagram of a dual-fuel generator based on a dual-fuel automatic switching system;

[0015] Figure 4 A schematic diagram of the internal structure of a dual-fuel generator based on a dual-fuel automatic switching system;

[0016] Figure 5 A schematic diagram of the internal structure of a dual-fuel generator based on a dual-fuel automatic switching system from another perspective;

[0017] Figure 6 A schematic diagram of the structure of a pneumatic switch in a dual-fuel automatic switching system;

[0018] Figure 7 It is a schematic cross-sectional structure diagram of the closed state of the self-closing device in the gas path channel in the second embodiment;

[0019] Figure 8 It is a schematic cross-sectional structure diagram of the self-closing device in the gas path channel in the second embodiment when it is in an open state. DETAILED DESCRIPTION

[0020] In order to further explain the technical means and effects adopted by the present invention to achieve the predetermined invention purpose, the specific implementation mode, structure, characteristics and effects of the present invention are described in detail below in combination with the accompanying drawings and preferred embodiments.

[0021] Reference Figure 1-6As shown, the first embodiment of the present invention provides a dual-fuel generator based on the above-mentioned dual-fuel automatic switching system, including a dual-fuel vehicle-mounted generator. The dual-fuel generator includes a housing 6, an oil circuit assembly 7, a power system 8 and a dual-fuel automatic switching system, and the oil circuit assembly 7, the power system 8 and the dual-fuel automatic switching system are all placed in the housing 6. In the dual-fuel automatic switching system, the front end of the gas input port 11 of the gas valve passes through the housing and is exposed to the housing, and the gas input port 11 is connected to the external gas assembly through a gas pipe, wherein the gas assembly includes a gas tank. The oil circuit assembly is connected to the oil circuit inlet end of the solenoid valve, and the solenoid valve output port is connected to the carburetor of the power system through a fuel channel, wherein the oil circuit assembly includes a fuel tank.

[0022] The housing 6 is provided with a positive DC output port 9 and a negative DC output port 10, the inner sides of the positive DC output port 9 and the negative DC output port 10 are connected to the power system 8, and the battery pack is connected to the positive DC output port and the negative DC output port respectively through wires.

[0023] The dual fuel automatic switching system comprises a gas valve 1, a switch 2 and a solenoid valve 3, wherein the gas valve is a two-stage pressure reducing valve. The gas valve 1 is provided with a gas input port 11 and two gas output ports, wherein one gas output port 12 is connected to the switch 2 through a first pipeline 4, and the other gas output port 13 is connected to the gas path inlet end 32 of the solenoid valve 3 through a second pipeline 5. The switch output end 222 is electrically connected to the solenoid valve 3 through a wire. The solenoid valve 3 is provided with an oil path inlet end 31 and a gas path inlet end 32, wherein the gas valve is connected to the gas path inlet end 32 through a second pipeline 5, and the oil path inlet end 31 can be connected to the oil path component through an oil path pipeline or an oil path channel or directly connected to the oil path component. When the gas enters the gas valve 1, the gas valve receives the gas pressure, and the gas pressure drives the switch 2 to be in a conducting state through the first pipeline 4, and the power generated by the switch 2 being turned on is transmitted to the solenoid valve 3 through the wire 24, and the solenoid valve 3 receives the electrical signal to close the valve at the oil path channel, and the gas is transmitted from the gas valve 1 to the gas path inlet end 32 through the second pipeline 5, thereby forming a gas path, and being in a gas supply state. When the gas stops entering the gas valve 1, the gas valve 1 does not receive the gas pressure, the switch automatically cuts off the power supply, the switch output port 222 is in a power-off state, the solenoid valve 3 does not receive the power signal and is in a non-working state, and the valve at the oil passage automatically opens to form an oil passage, which is in a fuel supply state. The entire automatic fuel switching process is completed within 1-3 seconds, realizing a short-time automatic switching without manual operation. When there is gas fuel, gas fuel is used first, which is energy-saving and environmentally friendly.

[0024] The switch 2 is a pneumatic switch, which is composed of a switch seat 21 and a micro switch 22. The micro switch is installed at one end of the switch seat 21, and the other end of the switch seat 21 is provided with an input port 23, and the first pipe 4 is connected to the input port. Specifically, a switch button 221 that can be pressed and retracted is provided at the bottom of the micro switch, and the part of the micro switch exposed from the switch seat has a metal conductive end 222 (i.e., the switch output end), and a moving contact and a static contact are provided inside the micro switch. The moving contact can contact or disconnect with the static contact under the drive of the switch button 221, thereby realizing the conduction or disconnection of the micro switch. An air intake inner tube 213 is provided in the switch base, and the switch button 22 of the micro switch is against the inner port of the air intake inner tube, and the outer port of the air intake inner tube is the input port 23 of the gas. The lower end of the switch seat is threadedly connected with a joint locking nut 211 and a pipe fixing nut 212. The first pipe 4 is sleeved on the air intake inner pipe and locked on the switch seat through the pipe fixing nut. The joint locking nut is locked between the pipe fixing nut and the switch seat to ensure the stability of the connection between the pipe fixing nut, the first pipe and the switch seat. When the gas enters the housing through the first pipe and the input port, and the gas pressure reaches the triggering pressure, the gas pressure triggers the switch button through the air intake inner pipe, driving the moving contact to contact the static contact, so that the micro switch is in a conducting state under the action of the gas pressure, and the metal conductive end 222 is in a conductive state, which is transmitted to the solenoid valve through the wire. When the gas pressure is insufficient, the switch button is reset, the moving contact is disconnected from the static contact, the micro switch is disconnected, and the switch automatically cuts off the power supply.

[0025] A fuel channel is provided in the solenoid valve 3, and an output port is provided in the fuel channel. The gas inlet end 32 and the oil inlet end 31 are both connected to the fuel channel, and a valve is provided between the oil inlet end 31 and the fuel channel. When the solenoid valve receives a power signal from the switch, the valve is in a closed state, so that the oil channel is closed. When the solenoid valve does not receive a power signal from the switch, the solenoid valve does not work, and the valve is in an open state, opening the oil channel.

[0026] Working principle: The gas in the gas component enters the gas valve through the gas input port, the switch receives the gas pressure and opens, the switch is in the on state, the power is transmitted from the switch output end to the solenoid valve, the solenoid valve closes the valve and cuts off the oil channel, and the gas is given priority; when the gas in the gas component is insufficient, the switch does not receive the gas pressure, the switch automatically disconnects and is in the off state, the solenoid valve is powered off and does not work, the valve opens and the oil channel is unobstructed, and the oil channel is supplied. The gas or fuel is transmitted to the power system through the fuel channel in the solenoid valve to provide energy support for the power system, and the power system converts the fuel or gas into electrical energy and outputs it from the positive DC output port 9 and the negative DC output port 10.

[0027] Reference Figure 1-8As shown, the second embodiment of the present invention provides a dual-fuel generator based on the dual-fuel automatic switching system, which is basically the same as the first embodiment, except that: the gas path 33 of the solenoid valve is provided with a self-closing device, the gas path part extends to the fuel channel inside the solenoid valve, the port of the gas path away from the fuel channel is the gas path inlet end 32, and the side wall of the gas path located in the fuel channel is provided with a plurality of gas outlets 34. The self-closing device includes a pull rod and a magnet 35, the pull rod includes a rod 36 and an end 37 fixed at the front end of the stem, and the end 37 is a metal material or a magnet material that can be magnetically attracted. An annular step 38 is provided on the front side of the inner cavity of the gas path, and the annular magnet 35 is fixed on the annular step 38. The outer surface of the magnet 35 is provided with a magnet sleeve 39, which is made of elastic material. A through hole 40 is provided at the bottom end of the gas path, and the rod 36 of the pull rod passes through the through hole and can move along the through hole. The rod of the pull rod is sleeved with a spring 41, and the spring 41 is located between the inner end surface of the end and the bottom end of the gas path. When the gas is supplied, when the gas enters the gas path 33 through the gas path inlet end 32 from the second pipeline 4, the gas pressure drives the end head 37 to separate from the magnet 35, and the gas outlet 34 is in a conducting state with the gas path, and the gas is transmitted to the fuel channel through the gas path 33 and the gas outlet 34 to form a gas path. When the gas pressure is insufficient, the end head is pushed to attract the magnet under the action of the spring, closing the gas path to prevent the mixing of the two fuels during the fuel switching process.

[0028] The above description is only a preferred embodiment of the present invention and does not limit the present invention in any form. Although the present invention has been disclosed as a preferred embodiment as above, it is not used to limit the present invention. Any technical personnel in this field can make some changes or modify the technical contents disclosed above into equivalent embodiments without departing from the scope of the technical solution of the present invention. However, any brief modifications, equivalent changes and modifications made to the above embodiments based on the technical essence of the present invention without departing from the content of the technical solution of the present invention are still within the scope of the technical solution of the present invention.

Claims

1. A dual-fuel generator with an automatic oil-gas switching system, characterized by: The invention comprises a shell, an oil circuit component, a power system and a dual-fuel automatic switching system, wherein the oil circuit component, the power system and the dual-fuel automatic switching system are placed in the shell, and the dual-fuel automatic switching system comprises a gas valve, a switch and a solenoid valve, wherein the gas valve is provided with a gas input port and two gas output ports, the front end of the gas input port of the gas valve passes through the shell and is located outside the shell, a gas output port of the gas valve is connected to the switch input port through a first pipeline, the switch output port is electrically connected to the solenoid valve, an oil circuit inlet end and a gas circuit inlet end are provided on the solenoid valve, another gas output port of the gas valve is connected to the gas circuit inlet end of the solenoid valve through a second pipeline, the oil circuit component is connected to the oil circuit inlet end of the solenoid valve, the gas input port of the gas valve is connected to an external gas component, and the output port of the solenoid valve is connected to the power system through a fuel channel, The switch is a pneumatic switch, which consists of a switch seat and a micro switch. The micro switch is installed at one end of the switch seat, and an input port is provided at the other end of the switch seat. The first pipeline is connected to the input port. When the gas enters through the first pipeline and the input port, and the gas pressure reaches the triggering pressure, the micro switch is in a conducting state under the action of the gas pressure. When the gas enters the gas valve, the gas valve receives the gas pressure, drives the switch to be in the on state through the first pipeline, and the power generated by the switch being turned on is transmitted to the solenoid valve. The solenoid valve receives the electrical signal and closes the valve at the oil passage. The gas is transmitted from the gas valve to the gas inlet end through the second pipeline to form a gas path, which is in the gas supply state; when the gas stops entering the gas valve, the gas valve does not receive the gas pressure, the switch automatically cuts off the power supply, the switch output port is in the off state, the solenoid valve does not receive the power signal and is in the non-working state, and the oil valve automatically opens to form an oil path, which is in the fuel supply state; A fuel channel is arranged in the solenoid valve, and an output port is arranged in the fuel channel. Both the gas path inlet end and the oil path inlet end are connected to the fuel channel. A valve is arranged between the oil path inlet end and the fuel channel. When the solenoid valve receives a power signal from the switch, the solenoid valve drives the valve to close, so that the oil path is closed. The air passage of the solenoid valve is provided with a self-closing device, the air passage part extends to the fuel passage of the solenoid valve, the port of the air passage away from the fuel passage is the air passage inlet end, the side wall of the air passage located in the fuel passage is provided with a plurality of air outlets, the self-closing device comprises a pull rod and a magnet, the pull rod comprises a rod portion and an end head fixed at the front end of the stem, the end head is made of a metal material or a magnet material that can be magnetically attracted, an annular step is provided on the front side of the inner cavity of the air passage, the annular magnet is fixed on the annular step, a magnet sleeve is provided on the outer surface of the magnet, and a through hole is provided at the bottom end of the air passage The rod of the pull rod passes through the through hole and can move along the through hole. The rod of the pull rod is sleeved with a spring, and the spring is located between the inner end face of the end head and the bottom end of the gas path. When the gas is supplied, when the gas enters the gas path from the second pipeline through the gas path inlet end, the gas pressure drives the end head to separate from the magnet, and the gas outlet and the gas path are in a conducting state. The gas is transmitted from the gas path and the gas outlet to the fuel channel to form a gas path. When the gas pressure is insufficient, the end head is pushed to attract the magnet under the action of the spring to close the gas path to prevent the mixing of the two fuels during the fuel switching process.

2. A dual-fuel generator with an oil-gas automatic switching system according to claim 1, characterized in that: The shell is provided with a positive DC output port and a negative DC output port, the inner sides of the positive DC output port and the negative DC output port are connected to the power system, and the battery pack is connected to the positive DC output port and the negative DC output port respectively through wires.

3. The dual-fuel generator with an oil-gas automatic switching system according to claim 2 is characterized in that: The micro switch is provided with a switch button and a metal conductive end. A moving contact and a static contact are arranged inside the micro switch. The moving contact can be in contact with or disconnected from the static contact under the drive of the switch button to realize the conduction or disconnection of the micro switch.

4. The dual-fuel generator with an oil-gas automatic switching system according to claim 3 is characterized in that: An air intake inner tube is arranged in the switch seat, a switch button of the micro switch abuts against an inner port of the air intake inner tube, an outer port of the air intake inner tube is an input port for the gas, a joint locking screw and a pipe fixing nut are threadedly connected to the lower end of the switch seat, and the first pipe is sleeved on the air intake inner tube and locked on the switch seat through the pipe fixing nut.

Images