CN108869062B - Fuel switching device for dual-fuel carburetor - Google Patents
Fuel switching device for dual-fuel carburetor Download PDFInfo
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- CN108869062B CN108869062B CN201810938615.7A CN201810938615A CN108869062B CN 108869062 B CN108869062 B CN 108869062B CN 201810938615 A CN201810938615 A CN 201810938615A CN 108869062 B CN108869062 B CN 108869062B
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- fuel
- carburetor
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- 239000000446 fuel Substances 0.000 title claims abstract description 66
- 238000007789 sealing Methods 0.000 claims abstract description 59
- 238000000605 extraction Methods 0.000 claims description 12
- 230000006835 compression Effects 0.000 claims description 10
- 238000007906 compression Methods 0.000 claims description 10
- 230000000903 blocking effect Effects 0.000 claims description 9
- 230000009977 dual effect Effects 0.000 claims description 6
- 239000007789 gas Substances 0.000 description 9
- 238000010586 diagram Methods 0.000 description 5
- 230000000694 effects Effects 0.000 description 3
- 239000002737 fuel gas Substances 0.000 description 3
- 230000000087 stabilizing effect Effects 0.000 description 3
- 238000006243 chemical reaction Methods 0.000 description 2
- 238000002485 combustion reaction Methods 0.000 description 2
- VNWKTOKETHGBQD-UHFFFAOYSA-N methane Chemical compound C VNWKTOKETHGBQD-UHFFFAOYSA-N 0.000 description 2
- 230000006978 adaptation Effects 0.000 description 1
- 230000009286 beneficial effect Effects 0.000 description 1
- 230000007547 defect Effects 0.000 description 1
- 239000003502 gasoline Substances 0.000 description 1
- 230000005484 gravity Effects 0.000 description 1
- 230000004048 modification Effects 0.000 description 1
- 238000012986 modification Methods 0.000 description 1
- 239000003345 natural gas Substances 0.000 description 1
Classifications
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- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F02—COMBUSTION ENGINES; HOT-GAS OR COMBUSTION-PRODUCT ENGINE PLANTS
- F02D—CONTROLLING COMBUSTION ENGINES
- F02D19/00—Controlling engines characterised by their use of non-liquid fuels, pluralities of fuels, or non-fuel substances added to the combustible mixtures
- F02D19/06—Controlling engines characterised by their use of non-liquid fuels, pluralities of fuels, or non-fuel substances added to the combustible mixtures peculiar to engines working with pluralities of fuels, e.g. alternatively with light and heavy fuel oil, other than engines indifferent to the fuel consumed
- F02D19/0602—Control of components of the fuel supply system
- F02D19/0613—Switch-over from one fuel to another
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- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F02—COMBUSTION ENGINES; HOT-GAS OR COMBUSTION-PRODUCT ENGINE PLANTS
- F02D—CONTROLLING COMBUSTION ENGINES
- F02D19/00—Controlling engines characterised by their use of non-liquid fuels, pluralities of fuels, or non-fuel substances added to the combustible mixtures
- F02D19/06—Controlling engines characterised by their use of non-liquid fuels, pluralities of fuels, or non-fuel substances added to the combustible mixtures peculiar to engines working with pluralities of fuels, e.g. alternatively with light and heavy fuel oil, other than engines indifferent to the fuel consumed
- F02D19/0639—Controlling engines characterised by their use of non-liquid fuels, pluralities of fuels, or non-fuel substances added to the combustible mixtures peculiar to engines working with pluralities of fuels, e.g. alternatively with light and heavy fuel oil, other than engines indifferent to the fuel consumed characterised by the type of fuels
- F02D19/0642—Controlling engines characterised by their use of non-liquid fuels, pluralities of fuels, or non-fuel substances added to the combustible mixtures peculiar to engines working with pluralities of fuels, e.g. alternatively with light and heavy fuel oil, other than engines indifferent to the fuel consumed characterised by the type of fuels at least one fuel being gaseous, the other fuels being gaseous or liquid at standard conditions
- F02D19/0647—Controlling engines characterised by their use of non-liquid fuels, pluralities of fuels, or non-fuel substances added to the combustible mixtures peculiar to engines working with pluralities of fuels, e.g. alternatively with light and heavy fuel oil, other than engines indifferent to the fuel consumed characterised by the type of fuels at least one fuel being gaseous, the other fuels being gaseous or liquid at standard conditions the gaseous fuel being liquefied petroleum gas [LPG], liquefied natural gas [LNG], compressed natural gas [CNG] or dimethyl ether [DME]
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- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F02—COMBUSTION ENGINES; HOT-GAS OR COMBUSTION-PRODUCT ENGINE PLANTS
- F02D—CONTROLLING COMBUSTION ENGINES
- F02D19/00—Controlling engines characterised by their use of non-liquid fuels, pluralities of fuels, or non-fuel substances added to the combustible mixtures
- F02D19/06—Controlling engines characterised by their use of non-liquid fuels, pluralities of fuels, or non-fuel substances added to the combustible mixtures peculiar to engines working with pluralities of fuels, e.g. alternatively with light and heavy fuel oil, other than engines indifferent to the fuel consumed
- F02D19/0663—Details on the fuel supply system, e.g. tanks, valves, pipes, pumps, rails, injectors or mixers
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- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F02—COMBUSTION ENGINES; HOT-GAS OR COMBUSTION-PRODUCT ENGINE PLANTS
- F02D—CONTROLLING COMBUSTION ENGINES
- F02D19/00—Controlling engines characterised by their use of non-liquid fuels, pluralities of fuels, or non-fuel substances added to the combustible mixtures
- F02D19/06—Controlling engines characterised by their use of non-liquid fuels, pluralities of fuels, or non-fuel substances added to the combustible mixtures peculiar to engines working with pluralities of fuels, e.g. alternatively with light and heavy fuel oil, other than engines indifferent to the fuel consumed
- F02D19/0663—Details on the fuel supply system, e.g. tanks, valves, pipes, pumps, rails, injectors or mixers
- F02D19/0673—Valves; Pressure or flow regulators; Mixers
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- Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
- Y02—TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINST CLIMATE CHANGE
- Y02T—CLIMATE CHANGE MITIGATION TECHNOLOGIES RELATED TO TRANSPORTATION
- Y02T10/00—Road transport of goods or passengers
- Y02T10/10—Internal combustion engine [ICE] based vehicles
- Y02T10/30—Use of alternative fuels, e.g. biofuels
Landscapes
- Engineering & Computer Science (AREA)
- Chemical & Material Sciences (AREA)
- Oil, Petroleum & Natural Gas (AREA)
- Combustion & Propulsion (AREA)
- Mechanical Engineering (AREA)
- General Engineering & Computer Science (AREA)
- Lubrication Of Internal Combustion Engines (AREA)
- Output Control And Ontrol Of Special Type Engine (AREA)
Abstract
The invention discloses a fuel switching device for a dual-fuel carburetor, which comprises a pressure taking pipeline, a fuel switching switch and an oil taking hole plugging module, wherein one end of the pressure taking pipeline is connected with a mixing chamber of the carburetor, the other end of the pressure taking pipeline is connected with a negative pressure cavity of the oil taking hole plugging module, a pressure relief hole and a sealing module for plugging the pressure relief hole are arranged on the pressure taking pipeline, the fuel switching switch comprises a first switch, a second switch and a third switch, and the first switch drives the second switch and the third switch. The invention is provided with the fuel change-over switch and the oil-taking hole plugging module, and utilizes the fuel change-over switch to be matched with various negative pressure cavities and pressure relief holes to realize the supply of oil-gas fuel to the carburetor, quickly change over different fuels, control the fuel supply, avoid the fuel leakage, improve the safety of the engine, ensure the working stability of the carburetor, avoid unstable pressure of the pressure-taking pipeline and excessive strain of the diaphragm assembly, prolong the service life of the diaphragm assembly, reduce the cost and save the resources.
Description
Technical Field
The invention belongs to the field of carburetors, and particularly relates to a fuel switching device for a dual-fuel carburetor.
Background
The dual-fuel carburetor is a mechanical device for mixing fuel and air in a certain proportion under the vacuum effect generated by the operation of an engine, the fuel is mostly gasoline and natural gas at present, a plurality of dual-fuel carburettors are switched by adopting control valves, the currently adopted switching devices are inconvenient to use and switch, unstable-pressure oil and gas are mixed, air leakage and oil leakage can occur gradually, potential safety hazards are brought to the engine, the service life is shortened, and the use cost is increased intangibly.
The present invention has been made in view of this.
Disclosure of Invention
The invention aims to solve the technical problems and overcome the defects of the prior art, and provides a fuel switching device for a dual-fuel carburetor, which adopts the following basic conception:
The utility model provides a fuel auto-change over device for dual fuel carburetor, includes pressure taking pipeline, fuel switch, oil extraction hole shutoff module, and pressure taking pipeline one end is connected with the mixing chamber of carburetor, and the other end is connected with the negative pressure chamber of oil extraction hole shutoff module, be equipped with the relief vent on the pressure taking pipeline, shutoff pressure relief vent's seal module, fuel switch includes first switch, second switch, third switch, and first switch drive second switch, third switch, and first switch is connected with the petrol inlet pipe of carburetor, and the second switch is connected with the gas inlet pipe of carburetor, and the third switch is established ties on pressure taking pipeline, controls the circulation of pressure taking pipeline to can drive seal module in order to open the relief vent, the relief vent sets up between third switch and negative pressure chamber, fuel switch can realize two kinds of states at least:
The first state, the first switch is closed, the second switch is opened, the third switch is opened and does not drive the sealing module, and the oil taking hole blocking module is used for blocking the oil taking hole;
In the second state, the first switch is opened, the second switch is closed, the third switch is closed, the driving sealing module opens the pressure relief hole, and the oil taking hole plugging module does not close the oil taking hole.
Further, the oil extraction hole plugging module comprises a cavity cover, a diaphragm assembly, a connecting bolt, a first magnet, a second magnet, a return spring and a sealing ejector rod, wherein the cavity cover is connected with the carburetor to form a cavity in a fixed connection mode, the diaphragm assembly is connected with the carburetor to divide the cavity into a negative pressure cavity and a balance cavity, the cavity cover is provided with a balance hole which communicates the outside with the balance cavity, the connecting bolt is connected with the carburetor, the connecting bolt is provided with a middle hole, one end of the first magnet is connected with the diaphragm assembly, the other end of the first magnet is located in the middle hole and slides in the middle hole, one end of the sealing ejector rod is connected with the second magnet, the other end of the sealing ejector rod is matched with the oil extraction hole of the carburetor and can plug the oil extraction hole, the return spring is sleeved on the sealing ejector rod, and the end part of the first magnet and the second magnet, which are close to each other, are mutually exclusive.
Further, the oil extraction hole plugging module comprises a sealing block, the sealing block is concave, the sealing block is arranged in the middle hole and is positioned between the first magnet and the second magnet, and one end of the first magnet, which is far away from the diaphragm assembly, is in sliding connection with the groove of the sealing block.
Further, the sealing module comprises a pressure relief hole button, a sealing block and a compression spring which are arranged in the pressure taking pipeline, the pressure relief hole button is connected with the sealing block, the compression spring is sleeved on the fixing rod, the compression spring is connected with the sealing block, and the pressure relief Kong Anniu can be used for blocking the pressure relief hole under the action of elasticity.
Further, the first switch is in meshed driving connection with the second switch and the third switch, the third switch is provided with an oval sheet, and the oval sheet is matched with the pressure relief Kong Anniu and can press the pressure relief Kong Anniu so that the pressure relief hole is not closed.
Further, the first switch, the second switch and the third switch are arranged in a line, the first switch is connected with the second switch in a meshed mode, the second switch is connected with the third switch in a meshed mode, the third switch is provided with an oval sheet, and the oval sheet is matched with the pressure relief Kong Anniu and can press the pressure relief Kong Anniu so that the pressure relief hole is not closed.
Further, the first switch is further capable of achieving a third state: the first switch is closed, the second switch is closed, the third switch is opened and does not drive the sealing module, and the oil taking hole blocking module closes the oil taking hole.
By adopting the technical scheme, compared with the prior art, the invention has the following beneficial effects.
The invention is provided with the fuel change-over switch and the oil-taking hole plugging module, and utilizes the fuel change-over switch to be matched with various negative pressure cavities and pressure relief holes to realize the supply of oil-gas fuel to the carburetor, quickly change over different fuels, control the fuel supply, avoid the fuel leakage, improve the safety of the engine, ensure the working stability of the carburetor, avoid unstable pressure of the pressure-taking pipeline and excessive strain of the diaphragm assembly, prolong the service life of the diaphragm assembly, reduce the cost and save the resources.
The invention has reasonable structure, strong practicability and great popularization and application value.
The following describes the embodiments of the present invention in further detail with reference to the accompanying drawings.
Drawings
The accompanying drawings, which are included to provide a further understanding of the application and are incorporated in and constitute a part of this specification, illustrate embodiments of the application and together with the description serve to explain the application. It is evident that the drawings in the following description are only examples, from which other drawings can be obtained by a person skilled in the art without the inventive effort. In the drawings:
FIG. 1 is a schematic diagram of an embodiment of the present invention;
FIG. 2 is a schematic diagram illustrating a first state of a fuel switch according to an embodiment of the present invention;
FIG. 3 is a schematic diagram illustrating the operation of the seal module in a first state according to an embodiment of the present invention;
FIG. 4 is a schematic diagram illustrating a second state of a fuel switch according to an embodiment of the present invention;
FIG. 5 is a schematic diagram illustrating the operation of the sealing module in a second state according to an embodiment of the present invention.
In the figure: 1-a mixing chamber; 2-a pressure taking pipeline; 21-a pressure relief vent; 3-fuel switch; 31-a first switch; 32-a second switch; 33-a third switch; 34-ellipsoids; 41-a cavity cover; 42-a diaphragm assembly; 43-a first magnet; 44-sealing blocks; 45-a second magnet; 46-a return spring; 47-connecting bolts; 48-sealing the ejector rod; 5-an oil taking hole; 61-pressure relief Kong Anniu; 62-sealing blocks; 63-compressing a spring; 71-a negative pressure cavity; 72-balancing the cavity; 8-balance holes.
It should be noted that these drawings and the written description are not intended to limit the scope of the inventive concept in any way, but to illustrate the inventive concept to those skilled in the art by referring to the specific embodiments.
Detailed Description
For the purpose of making the objects, technical solutions and advantages of the embodiments of the present invention more apparent, the technical solutions in the embodiments will be clearly and completely described with reference to the accompanying drawings in the embodiments of the present invention, and the following embodiments are used to illustrate the present invention, but are not intended to limit the scope of the present invention.
In the description of the present invention, it should be noted that the directions or positional relationships indicated by the terms "upper", "lower", "front", "rear", "left", "right", "vertical", "inner", "outer", etc. are based on the directions or positional relationships shown in the drawings, are merely for convenience of describing the present invention and simplifying the description, and do not indicate or imply that the devices or elements referred to must have a specific orientation, be configured and operated in a specific orientation, and thus should not be construed as limiting the present invention.
In the description of the present invention, it should be noted that, unless explicitly specified and limited otherwise, the terms "mounted," "connected," and "connected" are to be construed broadly, and may be either fixedly connected, detachably connected, or integrally connected, for example; can be mechanically or electrically connected; can be directly connected or indirectly connected through an intermediate medium. The specific meaning of the above terms in the present invention will be understood in specific cases by those of ordinary skill in the art.
Example 1
As shown in fig. 1 to 5, the fuel switching device for a dual-fuel carburetor according to the present embodiment includes a pressure-taking pipe 2, a fuel switch 3, and an oil-taking hole 5 plugging module, wherein the oil-taking hole 5 plugging module includes a cavity cover 41, a diaphragm assembly 42, a connecting bolt 47, a first magnet 43, a second magnet 45, a return spring 46, a seal ram 48, and a seal block 44, the cavity cover 41 is fixedly connected with the carburetor to form a cavity, the diaphragm assembly 42 is connected with the carburetor and separates the cavity into a negative pressure cavity 71 and a balance cavity 72, the cavity cover 41 is provided with a balance hole 8 communicating the outside with the balance cavity 72, the connecting bolt 47 is connected with the carburetor, the connecting bolt 47 is provided with a middle hole, one end of the first magnet 43 is connected with the diaphragm assembly 42, the other end is located in the middle hole and slides, the second magnet 45 is located in the middle hole and can slide, one end of the seal ram 48 is connected with the second magnet 45, the other end is matched with the oil-taking hole 5 and can plug the oil-taking hole 5, the return spring 46 is sleeved on the seal ram 48, and the end of the first magnet 43 and the second magnet 45 are mutually close to each other. The sealing block 44 is concave, the sealing block 44 is installed in the middle hole and is located between the first magnet 43 and the second magnet 45, and one end of the first magnet 43 away from the diaphragm assembly 42 is slidably connected with the groove of the sealing block 44.
One end of the pressure taking pipeline 2 is connected with the mixing chamber 1 of the carburetor, the other end of the pressure taking pipeline 2 is connected with the negative pressure cavity 71 of the plugging module of the oil taking hole 5, the pressure taking pipeline 2 is provided with a pressure relief hole 21 and a sealing module for plugging the pressure relief hole 21, the sealing module comprises a pressure relief Kong Anniu, a sealing block 62 and a compression spring 63 which are arranged inside the pressure taking pipeline 2, the pressure relief Kong Anniu is connected with the sealing block 62, the compression spring 63 is sleeved on a fixed rod, the compression spring 63 is connected with the sealing block 62, and the pressure relief Kong Anniu can be plugged with the pressure relief hole 21 under the action of elasticity.
The fuel switch 3 comprises a first switch 31, a second switch 32 and a third switch 33, the second switch 32 is connected with a fuel gas inlet pipe of the carburetor, the third switch 33 can drive the sealing module to be opened/closed, the first switch 31, the second switch 32 and the third switch 33 are arranged in a line, the first switch 31 is meshed with the second switch 32, the second switch 32 is meshed with the third switch 33, the first switch 31 is connected with a fuel gas inlet pipe of the carburetor, the second switch 32 is connected with the fuel gas inlet pipe of the carburetor, the third switch 33 is connected in series with the pressure taking pipeline 2 to control the circulation of the pressure taking pipeline 2, the third switch 33 is provided with an elliptic piece 34, the elliptic piece 34 is matched with the pressure relief Kong Anniu 61, the pressure relief Kong Anniu 61 can be pressed to enable the pressure relief hole 21 to be not closed, and the pressure relief hole 21 is arranged between the third switch 33 and the negative pressure cavity 71. Namely, the first switch 31 controls the conversion of fuel, the second switch 32 mainly controls the switching of gas fuel, and the third switch 33 controls the switching of pressure relief and oil fuel of the pressure taking pipeline 2.
By controlling the rotation of the first switch 31, the first switch 31 drives the second switch 32 to rotate, and the gas fuel supply is turned on/off, the second switch 32 rotates and simultaneously drives the third switch 33 to rotate, and the oval piece 34 of the third switch 33 can open the pressure relief hole 21, so that the pressure taking pipeline 2 is under the same pressure with the atmosphere, the negative pressure cavity 71 is under the same pressure with the balance cavity 72, and the oil taking hole 5 is communicated with oil.
Specifically, the first switch 31 is controlled to rotate, and the following three states can be achieved:
in the first state (using air), the first switch 31 is closed, the second switch 32 is opened, the third switch 33 is opened and does not drive the sealing module, and the oil taking hole 5 seals the oil taking hole 5. At this time, the first switch 31 is closed, the second switch 32 is opened, air is supplied to the carburetor, the third switch 33 is opened through gear linkage, namely, the oval plate 34 does not press the pressure relief Kong Anniu, the pressure relief hole 21 is plugged by the pressure relief Kong Anniu (the pressure relief hole 21 is sealed by the pressure relief spring 63 by the elastic force against the sealing block 62 in the pressure relief pipeline 2), so that the negative pressure of the carburetor mixing chamber 1 is conducted into the negative pressure cavity 71 through the pressure relief pipeline 2, the pressure of the negative pressure cavity 71 is small due to the existence of the balance hole 8, the pressure of the balance cavity 72 is large, the pressure difference is generated between the inside and the outside of the diaphragm assembly 42, the diaphragm assembly 42 and the first magnet 43 are pushed to move upwards by utilizing the atmospheric pressure, the first magnet 43 continues to push the second magnet 45 and the sealing ejector 48 to move upwards by overcoming the elastic force of the return spring 46, and finally, the end part of the sealing ejector 48 plugs the oil taking hole 5, and the oil taking hole 5 is sealed and the oil way is cut off. At this time, the carburetor is driven by gas combustion.
In the second state (oil is used), the first switch 31 is opened, the second switch 32 is closed, the third switch 33 is closed, the driving sealing module opens the pressure relief hole 21, and the oil taking hole 5 is not closed by the oil taking hole 5 blocking module. The first switch 31 is rotated 90 degrees anticlockwise, the first switch 31 is opened, the second switch 32 is closed, the third switch 33 is closed through gear linkage, namely the oval disc 34 presses the pressure relief Kong Anniu, the pressure relief hole 21 of the pressure taking pipeline 2 is opened (the oval disc 34 presses the pressure relief Kong Anniu 61, the sealing block 62 overcomes the elastic force of the spring to separate from the inner wall of the pressure taking pipeline 2, the inside of the pipe is communicated with the atmosphere), thereby cutting off negative pressure conduction in the carburetor mixing chamber 1, simultaneously releasing negative pressure in part of the pressure taking pipeline 2 between the negative pressure cavity 71 and the third switch 33, the negative pressure cavity 71 and the balance cavity 72 are equal in pressure, so that no pressure difference exists between the inside and the outside of the diaphragm assembly 42, the first magnet 43, the second magnet 45, the self gravity of the sealing ejector rod 48 and the elastic force of the return spring 46 are utilized, so that the sealing ejector rod is separated from the oil taking hole 5, and the oil way is restored, and at the moment, the function of fuel conversion is realized by using oil combustion driving of the carburetor.
In the third state (without fuel), the first switch 31 is closed, the second switch 32 is closed, the third switch 33 is opened and does not drive the sealing module, and the oil taking hole 5 seals the oil taking hole 5. When the first switch 31 is turned on, the second switch 32 is turned off, oil is used at this time, the first switch 31 is rotated 90 degrees anticlockwise, the oil way is turned off, but the gear on the rotating position is toothless and cannot be meshed to drive the second switch 32 and the third switch 33, so that the oil, gas and pressure taking at the gear are all at the off positions, the positions can be set as the engine flameout switch, the oil and gas are all at the off positions, no fuel is leaked after flameout, and the safety of the engine is improved.
The rotation angles and directions of the first switch 31, the second switch 32, and the third switch 33 are all examples, and the three switches may be turned on/off in the three states without limitation.
In addition, the pressure relief hole 21 and the sealing module are matched to play a role in stabilizing pressure, and after the return spring 46 is made by selecting a spring with proper elasticity in the pressure relief hole 21 of the pressure taking pipeline 2, the pressure stabilizing effect of the pressure taking pipeline 2 can be played; the operating strength of the diaphragm assembly 42 is reduced and its service life is extended. Because the negative pressure of the engine from the idle working condition to the fully-open working condition mixing chamber 1 is greatly changed, when the negative pressure in the pressure taking pipeline 2 is larger than the spring pressure, the sealing block 62 is sucked open, and the pipeline is communicated with the atmosphere, so that the effect of reducing the negative pressure is achieved; when the negative pressure in the pressure taking pipeline 2 is smaller than the spring pressure, the sealing block 62 is pushed to the inner wall of the pressure taking pipeline 2 by the spring force to continuously play a role in sealing, so that the negative pressure of the pressure taking pipeline 2 begins to be enhanced again. The operation is repeated, and the effect of stabilizing the voltage is achieved.
The invention is provided with the fuel change-over switch and the oil-taking hole plugging module, and utilizes the fuel change-over switch to be matched with various negative pressure cavities and pressure relief holes to realize the supply of oil-gas fuel to the carburetor, quickly change over different fuels, control the fuel supply, avoid the fuel leakage, improve the safety of the engine, ensure the working stability of the carburetor, avoid unstable pressure of the pressure-taking pipeline and excessive strain of the diaphragm assembly, prolong the service life of the diaphragm assembly, reduce the cost and save the resources.
The foregoing description is only illustrative of the preferred embodiment of the present invention, and is not to be construed as limiting the invention, but is to be construed as limiting the invention to any and all simple modifications, equivalent variations and adaptations of the embodiments described above, which are within the scope of the invention, may be made by those skilled in the art without departing from the scope of the invention.
Claims (5)
1. The utility model provides a fuel auto-change over device for dual fuel carburetor, its characterized in that includes pressure taking pipeline, fuel change over switch, oil extraction hole shutoff module, and pressure taking pipeline one end is connected with the mixing chamber of carburetor, and the other end is connected with the negative pressure chamber of oil extraction hole shutoff module, be equipped with the relief hole on the pressure taking pipeline, shutoff pressure relief hole's sealing module, fuel change over switch includes first switch, second switch, third switch, and first switch drives second switch, third switch, and first switch is connected with the petrol of carburetor advances the pipe, and the second switch advances the pipe with the gas of carburetor and is connected, and the third switch is established ties on pressure taking pipeline, controls the circulation of pressure taking pipeline to can drive sealing module in order to open the relief hole, the relief hole sets up between third switch and negative pressure chamber, fuel change over switch can realize two kinds of states at least:
The first state, the first switch is closed, the second switch is opened, the third switch is opened and does not drive the sealing module, and the oil taking hole blocking module is used for blocking the oil taking hole;
the second state, the first switch is opened, the second switch is closed, the third switch is closed and drives the sealing module to open the pressure relief hole, and the oil taking hole plugging module does not close the oil taking hole;
The oil extraction hole plugging module comprises a cavity cover, a diaphragm assembly, a connecting bolt, a first magnet, a second magnet, a return spring and a sealing ejector rod, wherein the cavity cover is fixedly connected with a carburetor to form a cavity, the diaphragm assembly is connected with the carburetor and separates the cavity into a negative pressure cavity and a balance cavity, the cavity cover is provided with a balance hole for communicating the outside with the balance cavity, the connecting bolt is connected with the carburetor, the connecting bolt is provided with a middle hole, one end of the first magnet is connected with the diaphragm assembly, the other end of the first magnet is positioned in the middle hole and slides, the second magnet is positioned in the middle hole and can slide, one end of the sealing ejector rod is connected with the second magnet, the other end of the sealing ejector rod is matched with the oil extraction hole of the carburetor and can plug the oil extraction hole, the return spring is sleeved on the sealing ejector rod, and the end of the first magnet and the second magnet are mutually close to each other mutually exclusive;
The sealing module comprises a pressure relief hole button, a sealing block and a compression spring, wherein the pressure relief hole button, the sealing block and the compression spring are arranged in the pressure taking pipeline, the pressure relief hole button is connected with the sealing block, the compression spring is sleeved on the fixing rod, the compression spring is connected with the sealing block, and the pressure relief Kong Anniu can be used for plugging the pressure relief hole under the action of elasticity.
2. The fuel switch for a dual fuel carburetor of claim 1 wherein said oil extraction port blocking module includes a sealing block having a concave shape, the sealing block being mounted in the central bore and positioned between the first magnet and the second magnet, the end of the first magnet remote from the diaphragm assembly being slidably connected to the groove of the sealing block.
3. A fuel switching apparatus for a dual fuel carburetor according to claim 1 wherein the first switch is drivingly engaged with the second and third switches, the third switch having an oval tab which cooperates with the relief Kong Anniu to depress the relief Kong Anniu to unblock the relief orifice.
4. The fuel switching apparatus for a dual fuel carburetor of claim 1 wherein the first, second and third switches are arranged in a line, the first switch is in meshed connection with the second switch, the second switch is in meshed connection with the third switch, the third switch is provided with an oval plate, the oval plate cooperates with the relief Kong Anniu to press the relief Kong Anniu to unblock the relief aperture.
5. A fuel switching arrangement for a dual fuel carburetor according to any of claims 1-4 wherein the first switch is further operable to achieve a third state: the first switch is closed, the second switch is closed, the third switch is opened and does not drive the sealing module, and the oil taking hole blocking module closes the oil taking hole.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201810938615.7A CN108869062B (en) | 2018-08-17 | 2018-08-17 | Fuel switching device for dual-fuel carburetor |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201810938615.7A CN108869062B (en) | 2018-08-17 | 2018-08-17 | Fuel switching device for dual-fuel carburetor |
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| Publication Number | Publication Date |
|---|---|
| CN108869062A CN108869062A (en) | 2018-11-23 |
| CN108869062B true CN108869062B (en) | 2024-07-05 |
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| CN201810938615.7A Active CN108869062B (en) | 2018-08-17 | 2018-08-17 | Fuel switching device for dual-fuel carburetor |
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| CN110953091A (en) * | 2019-11-01 | 2020-04-03 | 陈其安 | Oil-gas dual-purpose carburetor |
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| CN208803911U (en) * | 2018-08-17 | 2019-04-30 | 福鼎市卡夫卡机械部件有限公司 | A kind of fuel changing-over device for dual-fuel carburetor |
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| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| SE418983B (en) * | 1979-11-06 | 1981-07-06 | Saab Scania Ab | ARRANGEMENTS FOR CONVERSION OF CARBON GASES ON INCORPORATION ENGINES |
| JPS56107939A (en) * | 1980-01-31 | 1981-08-27 | Mazda Motor Corp | Carburetor in engine |
| US4594990A (en) * | 1985-06-03 | 1986-06-17 | Propane Carburetion Systems, Inc. | Carburetor for gaseous fuel |
| DE3823525A1 (en) * | 1987-11-06 | 1990-01-18 | Stihl Maschf Andreas | CARBURETTOR FOR COMBUSTION ENGINES |
| CN106368853B (en) * | 2016-11-01 | 2018-01-30 | 重庆大江动力设备制造有限公司 | Carburetor and its fuel-firing gas-firing switching mechanism |
| CN206600212U (en) * | 2017-04-12 | 2017-10-31 | 夏品清 | Integration-in-one oil-gas two-way carburetor |
| CN107165741B (en) * | 2017-06-20 | 2023-01-24 | 福鼎市卡夫卡机械部件有限公司 | Oil-gas dual-purpose carburetor capable of automatically switching fuel |
| CN108331680A (en) * | 2018-04-20 | 2018-07-27 | 夏品清 | The oil-gas two-way carburetor and its bottom cup that double fuel automatically switches |
-
2018
- 2018-08-17 CN CN201810938615.7A patent/CN108869062B/en active Active
Patent Citations (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN208803911U (en) * | 2018-08-17 | 2019-04-30 | 福鼎市卡夫卡机械部件有限公司 | A kind of fuel changing-over device for dual-fuel carburetor |
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| CN108869062A (en) | 2018-11-23 |
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