CN203586258U - Fuel injection device - Google Patents

Fuel injection device Download PDF

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Publication number
CN203586258U
CN203586258U CN201320717792.5U CN201320717792U CN203586258U CN 203586258 U CN203586258 U CN 203586258U CN 201320717792 U CN201320717792 U CN 201320717792U CN 203586258 U CN203586258 U CN 203586258U
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CN
China
Prior art keywords
fuel
nozzle
combustion
pipe
air
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Expired - Lifetime
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CN201320717792.5U
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Chinese (zh)
Inventor
增田幸一
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Miura Industries China Co Ltd
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Three Pu Industrial Equipment (suzhou) Co Ltds
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Priority to CN201320717792.5U priority Critical patent/CN203586258U/en
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Abstract

The utility model discloses a fuel injection device which comprises a first nozzle, a first fuel supply pipe connected with the first nozzle, a first valve arranged on the first fuel supply pipe, a second nozzle arranged adjacently to the first nozzle, a second fuel supply pipe connected with the first fuel supply pipe, a first branched pipe, a second branched pipe, a second valve and a third valve. The first branched pipe and the second branched pipe are connected with end portions opposite to end portions of the second nozzle of the second fuel supply pipe, the second valve and the third valve which can be opened and closed are arranged on the first branched pipe and the second branched pipe, and a fuel supply source is connected on the first branched pipe and the second branched pipe directly or indirectly through other pipelines. Two piping systems are connected on a high burning nozzle, and a valve used for switching is arranged on each system, so that easiness in switching of fuel supply paths is realized.

Description

A kind of fuel injection device
Technical field
the utility model relates to a kind of fuel injection device.
Background technology
in prior art, boiler supplies fuel and air to combustion chamber by burner, the fuel ejecting from burner in burning Indoor Combustion.Water in the water pipe that boiler configures in to combustion chamber by the heat that produces in burner combust fuel heats, and produces steam.A kind of fuel injection device that burner comprises burner oil and air fed air feeder.
some boiler can switch caloric value stage by stage.Such as, the burner that can divide carried out multisection type burning that syllogic burning that " high combustion, low burning and stop " syllogic is adjusted fuel is controlled and so on to control, the second fuel flow path that the second fuel valve is housed on its boiler with flow control valve and throttling are housed in the 3rd fuel flow path that connects converge and be connected with nozzle with high combustion afterwards.When boiler is switched to high combustion operation by low burning operation, first open flow control valve and transfer valve, from the 3rd stream to high combustion nozzle feed fuels.Then, after the stipulated time, when closing transfer valve, open the second fuel valve, from second road direction high combustion nozzle feed fuels.
Summary of the invention
the utility model object is: provide a kind of simple in structure, can stablize again a kind of fuel injection device that fuel is provided.
the technical solution of the utility model is: a kind of fuel injection device, comprise the first nozzle, the first fuel feed pipe being connected with described the first nozzle, be configured on described the first fuel feed pipe can switch the first valve, with described the first nozzle disposed adjacent and the second nozzle larger than described the first nozzle diameter, be connected with described second nozzle and than the second larger fuel feed pipe of described the first fuel feed pipe bore, the first branched pipe that the contrary end, end connecting with the described second nozzle of described the second fuel feed pipe connects, the contrary end, end connecting with the described second nozzle of described the second fuel feed pipe connects and second branched pipe larger than described the first branched pipe flow path resistance, be configured on described the first branched pipe can switch second valve, and be configured on described the second branched pipe can switch the 3rd valve.
further, on described the second branched pipe, configure in throttling and connect.
further, on described the first fuel feed pipe, described the first branched pipe and described the second branched pipe, directly or indirectly by other pipelines, connect fuel supply source.
the utility model has the advantages that: the utility model, by connect 2 piping systems on high combustion nozzle, is provided for respectively the valve of switching in each system, realizes the light switching of fuel feed path.In addition, when switching the piping system of feed fuels, can allow the piping system of a side keep the state of fuel supply, the fuel that simultaneously starts opposite side piping system is supplied with.Therefore, can effectively guarantee from the continuous feed fuels of second nozzle, accomplish both simple in structure, again can stable supplying fuel.
Accompanying drawing explanation
below in conjunction with drawings and Examples, the utility model is further described:
fig. 1 is the longitudinal profile schematic diagram of the boiler that the present embodiment is relevant;
fig. 2 is structural representation of the present utility model.
wherein: 10 boilers (burner); 12 combustion chambers (tank body, heat absorption means); 14 air feeders; 16 1 kinds of fuel injection devices; 17 burners; 20 control device; 30 pressure fans; 32 air supply pipes; 34 bellows; 35 air flow circuits; 36 air doors; 38 door driving devices; 40 fuel supply systems (fuel supply source); 42 fuel supply units; 44 nozzle units; 46 high combustions are supplied with section with fuel; 48 low burnings are supplied with section with fuel; 50 nozzles for high combustion (second nozzle); 52 low nozzles (the first nozzle) for burning; 60 fuel feed pipes; 62 first branched pipes; 64 second branched pipes; 65 fuel feed pipes for high combustion (the second fuel feed pipe); 66 supply with adjustment structure; 68 high combustion magnetic valves (the first branched pipe valve); 70 switching solenoid valves (the second branched pipe valve); In 72 throttlings, connect; 73 low fuel feed pipes (the first fuel feed pipe) for burning; 74 low combustion magnetic valves (low burning valve).
The specific embodiment
embodiment:
< boiler >
the boiler of a kind of fuel injection device of outfit of being correlated with regard to the utility model embodiment below describes.As shown in Figure 1, the boiler (burner) 10 that the present embodiment is relevant has combustion chamber (tank body, heat absorption means) 12, air feeder 14, a kind of fuel injection device 16, control device 20.On boiler 10, a part for a part for combustion chamber 12 1 sides of air feeder 14 and combustion chamber 12 1 sides of a kind of fuel injection device 16 forms burner 17.Burner 17 mixes fuel and air be injected into combustion chamber 12 and burns.Suppose that boiler 10 is a kind of circular multitube through-flow boilers.Suppose that the boiler 10 that the present embodiment is relevant can be used the fuel such as the liquid fuels such as gaseous fuel, light oil or heavy oil or fine coal.
combustion chamber 12 is tank bodies that a kind of heat of the combustion product gases that burner 17 combustion fuels are produced absorbs.Combustion chamber 12 has top header, bottom header and water pipe group.Water pipe group refers to that arranged perpendicular is between top header and bottom header, several water pipes that both are linked together.Stove water is in outside is supplied to bottom header, till being finally supplied to water pipe group's assigned position.In the header of top, be connected with steam suppling tube.Heat exchange is carried out by the water in water pipe group's water pipe and combustion product gases in combustion chamber 12, allows water evaporation produce steam, and the steam of generation is supplied to connected gas-distributing cylinder and is finally supplied to steam use side through steam suppling tube again.
air feeder 14 is supplied to burner 17 by combustion air (extraneous air).The air that air feeder has pressure fan 30, send for pressure fan 30 carries out mobile air supply pipe 32, the bellows 34 that are connected with the front end of air supply pipe 32, from the air fed air flow circuit 35 of bellows, air door 36 and door driving device 38.And air flow circuit 35 forms a part for air feeder 14, also form a part for burner 17.
pressure fan 30 is supplied with combustion air to coupled air supply pipe 32.Pressure fan 30 can be adjusted the air capacity of supply, and the control adjustment based on control device 20 is supplied to the air mass flow of air supply pipe 32.
one end of air supply pipe 32 connects pressure fan 32, and the other end connects bellows 34.Air supply pipe 32 is supplied to bellows 34 by the combustion air A coming from pressure fan 30.
bellows 34 are boxed-section shape, are connected with air supply pipe 32 and air flow circuit 35, air supply pipe 32 is supplied with to the combustion air A coming and be supplied to air flow circuit 35.The air supply pipe 32 connected from bellows 34 and the bearing of trend of air flow circuit 35 are respectively towards different directions.Bellows 34 are boxed-section shape, and the space in case flows into for air, then changes the flow direction of air and discharges air.Thus, can eliminate the mobile inequality of the combustion air A that is supplied to bellows 34, and combustion air A is supplied to air flow circuit 35.
air flow circuit 35 is the pipe arrangements that are connected with bellows 34.A part for air flow circuit 35 in the present embodiment is exposed combustion chamber 12, and a part is built in bellows 34.Air flow circuit 35 will be supplied with combustion air A 12 discharges towards combustion chamber of coming from bellows 34.In addition, the content of air flow circuit 35 is inserted with a kind of nozzle unit 44 of fuel injection device 16.
air door 36 is configured on air supply pipe 32.That is to say that air door 36 is configured in the flow region of combustion air A of air supply pipe 32.Air door 36 forms the flow path resistance of air supply pipe 32.In addition, air door 36 is controlled by door driving device 38, and with respect to air supply pipe 32, it can move.Air door 36 in the present embodiment is planks similar to the section of air supply pipe 32.But the shape of air door 36 does not limit, its effect is the flow path resistance that forms air supply pipe 32, and passes through door driving device 38 shift positions to change flow path resistance.
door driving device 38 is a kind of position of air door 36 and devices of angle adjusted, and by adjusting position and the angle of air door 36, adjusts the flow path resistance in air supply pipe 32.For example, door driving device 38 moves to air door 36 position of air door 36a, namely the face of the area maximum of air door 36a and the bearing of trend of air supply pipe 32 are become parallel towards, the resistance that air door 36a can be formed air supply pipe 32 be turned down.
air feeder 14, as mentioned above, air flow circuit 35 12 injections to combustion chamber by combustion air A from a part for formation burner 17.In addition can be by controlling pressure fan 30 or door driving device 38, regulate pressure fan 30 to the air capacity of air supply pipe 32 supplies or the flow path resistance of adjusting air supply pipe 32, thereby regulate from the amount of air flow circuit 35 from 12 combustion air A that spray to combustion chamber.
in addition, air feeder 14 also can be supplied to air supply pipe 32 by a part for 12 combustion product gases of discharging from combustion chamber.That is to say, a part of combustion product gases can be circulated.Air feeder 14, by adjusting the quantity delivered of combustion product gases, can be adjusted the oxygen concentration of the air that is supplied to combustion chamber 12 as one of fuel combustion conditions.
a kind of fuel injection device 16 is supplied with burning F to burner 17.A kind of fuel injection device 16 have fuel supply system (fuel supply source) 40, from fuel supply system 40 supply with the general fuel supply unit 42 of the fuel flow of coming, will from fuel supply unit 42 supply with the fuel that come to combustion chamber 12 nozzle units 44 that spray.The flow of the fuel that fuel supply system 40 has the fuel tank that storage of fuels uses, the carrier structure that fuel is discharged to fuel supply unit 42, supply with to fuel supply unit 42 is adjusted structure etc.Fuel supply system 40 is to fuel supply unit 42 feed fuels.
one end of fuel supply unit 42 connects fuel supply system 40, and the other end connects nozzle unit 44.Fuel supply unit 42 is inserted in the middle of air flow circuit 35, by air flow circuit 35, is surrounded.The front end of nozzle unit 44 is exposed in combustion chamber 12, the 12 interior burner oils to combustion chamber.That is to say, nozzle unit 44 is the same with fuel supply unit 42, by air flow circuit 35, is surrounded.Thus, the fuel ejecting from nozzle unit 44 with from being configured in the fuel that nozzle unit 44 ambient air streams 35 discharge, with air A, mix.
a kind of fuel injection device 16 passes through nozzle unit 44 to the interior injection of air supply pipe 32 by the fuel that is supplied to fuel supply unit 42 from fuel supply system 40.Thus, in air supply pipe 32, pressure fan 30 is supplied with the combustion air of coming and nozzle unit 44 and is supplied with the fuel of coming and mix generation mixture (mist, air and by the mixture of the fuel of corpusculed).About a kind of fuel injection device 16, will be explained hereinafter.
as mentioned above, burner 17 comprises air flow circuit 35 and nozzle unit 44.Particularly, burner 17 has the combustion air A spout part of air flow circuit 35 and the fuel F spout part of nozzle unit 44.Burner 17 is exposed in combustion chamber 12.Burner 17 mutually mixes produced mixture (mist, air and by the mixture of the fuel of corpusculed) and burns in combustion chamber 12 spray the combustion air A coming and the fuel F coming from nozzle unit 44 injections from air flow circuit 35.
the mixture that burned device 17 is ejected into combustion chamber 12 becomes the combustion product gases of high temperature after burner 17 burnings.In this description, combustion product gases represents product after fuel combustion reaction finishes or the fuel in the combustion reaction at least a certain concept in the two.That is to say, combustion product gases can refer to product after fuel combustion reaction finishes and the fuel in fuel reaction simultaneously, also can singly refer to the product after fuel combustion reaction finishes, or singly refer to the fuel in combustion reaction.
control device 20 is controlled the action of the various piece of boiler 10, the quantity of steam that adjustment produces and steam pressure etc.Such as, the signal designation that control device sends over based on linkage, controls the aperture of fuel control valve and the air output of pressure fan 30, switches the combustion mode of burner 17.In addition, control device is also the control end of combustion ejection device 16.Control device 20 in the present embodiment, by regulating fuel and the air feeder 14 that combustion ejection device 16 ejects, supply with the combustion air of coming, allow the ratio of combustion air and fuel reach setting value, the fuel mode of minute high combustion pattern and two kinds of different quantity combusteds of low combustion mode is carried out the burning of burner 17.High combustion pattern refers to the pattern of quantity combusted maximum, and low combustion mode refers to the pattern that quantity combusted is less than high combustion pattern.When control device 20 is carried out high combustion pattern, fuel feed is adjusted to maximum, forms maximum flame.When control device 20 is carried out low combustion mode, few when the quantity delivered of fuel is adjusted to than high combustion pattern, form less flame.Control device 20 is along with the increase and decrease by air supply amount of the variation control combustion of fuel feed.About control action, will be explained hereinafter.In addition, the situation of just lifting two stage combustion pattern in the present embodiment is illustrated, and in fact combustion mode also can be divided three sections and switched above.And the low combustion mode of boiler 10 also can refer to the burning of start-up burner.
< fuel injection device >
next, by Fig. 1 and Fig. 2, with regard to a kind of formation of fuel injection device 16, describe.Above-mentioned a kind of fuel injection device 16 comprises fuel supply system 40, fuel supply unit 42, nozzle unit 44.Nozzle unit 44 comprises nozzle 50 and low burner noz(zle) 52 for high combustion.In the present embodiment, high combustion is equivalent to second nozzle with nozzle 50, and low burning is equivalent to the first nozzle with nozzle 52.High combustion forms jet with nozzle 50 and low burning with nozzle 52, supplies with the fuel of coming out injected from jet.High combustion uses nozzle 52 along air flow quilt the row arrangement of air flow circuit 35 with nozzle 50 and low burning, and jet position is each other adjacent.High combustion is the nozzles of feed fuels F when boiler 10 moves under high combustion pattern with nozzle 50.Low burning is the nozzles of feed fuels F when boiler 10 moves under low combustion mode with nozzle 52.High combustion is slightly different to guarantee spraying more fuel than low burning with nozzle 52 by the shape of nozzle 50.For example, high combustion is larger with the bore of the pipe arrangement of nozzle 52 than low burning with nozzle 50.In addition, high combustion is also used the large of nozzle 52 than low burning with the gross area of the jet of nozzle 50.
the fuel that fuel supply unit 42 is come fuel supply system 40 supplies is supplied to respectively high combustion use nozzle 50 and nozzle 52 for low burning.Fuel supply unit 42 has to high combustion to be supplied with section 46 and with the low burning of nozzle 52 feed fuels, with fuel, supplies with section 48 to low burning with fuel with the high combustion of nozzle 50 feed fuels.Fuel supply unit 42 also has connection high combustion and supplies with the fuel feed pipe 60 of fuel supply section 48 and fuel supply system 40 for section 46/ low burning with fuel.Fuel feed pipe 60 is supplied to fuel supply section 48 for fuel supply section 46 and low burning for high combustion by supply with the fuel F1 coming from fuel supply system 40.
high combustion is supplied with section 46 with fuel and is had the first branched pipe 62, the second branched pipe 64, fuel feed pipe 65 and supply adjustment structure 66 for high combustion.One end of the first branched pipe 62 is connected with fuel feed pipe 62, and the other end is connected with fuel feed pipe 65 with high combustion.One end of the second branched pipe 64 is connected with fuel feed pipe 60, and the other end is connected with fuel feed pipe 65 with high combustion.High combustion is connected with the second branched pipe 64 with the first branched pipe 62 with one end of fuel feed pipe 65, and the other end is connected with nozzle 50 with high combustion.
high combustion is supplied with section 46 and fuel feed pipe 60 and high combustion with being connected with 64 two sections of pipelines of the first branched pipe 62 and the second branched pipe respectively between fuel feed pipe 65 with fuel.High combustion is supplied with section 46 with fuel and merge into 1 pipeline again after being divided into two-way from fuel feed pipe 60 to high combustion with nozzle 50.At this, the sectional area of the first branched pipe 62 to the second branched pipes 64 is larger, and the bore of pipe arrangement (diameter) is also large than the second branched pipe 64.
supply adjustment structure 66 has high combustion in magnetic valve (the first branched pipe valve) 68, switching solenoid valve (the second branched pipe valve) 70 and throttling and connects 72.High combustion magnetic valve 68 be can switch magnetic valve.High combustion is supplied with section 46 after height combustion magnetic valve 68 is opened with fuel, comes and the fuel F2 by the first branched pipe 62 is supplied to fuel feed pipe 65 by supplying with from fuel feed pipe 60; After high combustion magnetic valve 68 cuts out, the fuel circulation of the first branched pipe 62 is cut off, and via the first branched pipe 62, the fuel supply from fuel feed pipe 60 to high combustion with fuel feed pipe 65 stops.Switch and be arranged on the second branched pipe 64 with magnetic valve 70.Switching solenoid valve be can switch magnetic valve.High combustion is supplied with section 46 after switching solenoid valve 70 is opened with fuel, comes and the fuel F3 by the second branched pipe 64 is supplied to fuel feed pipe 65 for high combustion by supplying with from fuel feed pipe 60; After switching solenoid valve 70 is closed, the circulation of the fuel of the second branched pipe 64 is cut off, and via the second branched pipe 64, the fuel supply from fuel feed pipe 60 to high combustion with fuel feed pipe 65 stops.In throttling, connecing 72 is arranged on the second branched pipe 64.In throttling, connect the flow path resistance of 72 formation the second branched pipes 64, the fuel F3's in obstruction the second branched pipe 64 flows.The second branched pipe 64 allows the mobile of fuel F3 become difficult by connecing 72 installation in throttling.
low burning is supplied with section 48 with fuel and is had fuel feed pipe 73 and low combustion magnetic valve 74 for low burning.Low burning connects fuel feed pipe 60 with one end of fuel feed pipe 73, and the other end connects low nozzle 52 for burning.Low combustion magnetic valve (low burning valve) 74 is arranged on low burning with on fuel feed pipe 73.Low combustion magnetic valve 74 be can switch magnetic valve.Low burning is supplied with section 48 after low burning magnetic valve 74 is opened with fuel, comes and with the fuel F4 of fuel feed pipe 73, be supplied to low nozzle 52 for burning by low burning by supplying with from fuel feed pipe 60; After low combustion magnetic valve 74 cuts out, low burning is cut off with the fuel circulation in fuel feed pipe 73, and the fuel supply from fuel feed pipe 60 to low burning with nozzle 52 stops.
fuel supply unit 42 can be by opening high combustion magnetic valve 68, then via the first branched pipe 62 to nozzle 50 feed fuels F2 for high combustion.In addition, fuel supply unit 42 also can be by opening switching solenoid valve 70, then via the second branched pipe 64 to nozzle 50 feed fuels F3 for high combustion.Fuel supply unit 42 can also be by opening low combustion magnetic valve 74 to nozzle 52 feed fuels F4 for low burning.Now, fuel supply unit 42 is opened certain valve in high combustion magnetic valve 68, switching solenoid valve 70, low combustion magnetic valve 74, the flow situation of each pipeline when residue valve keeps closing is: the flow of fuel F2 is more than the flow of fuel F3, and the flow of fuel F3 is more than the flow of fuel F4 again.In addition, the fuel supply unit 42 in the present embodiment is equivalent to the first fuel feed pipe of fuel feed pipe 73 for low burning, and high combustion is equivalent to the second fuel feed pipe with supply pipe 65.
boiler 10 is controlled by the action of 20 pairs of each several parts of control device, thereby realizes each action.Control device 20 drives air feeder 14 and a kind of fuel injection device 16, starts the burning of fuel device 17.During low combustion mode, control device 20 is supplied with section 48 feed fuels from low burning with fuel, and with ejecting, allow the fuel being ejected in combustion chamber 12 nozzle 52, carries out fuel formation flame from low burning.Be exactly specifically, open low combustion magnetic valve 74, to nozzle 52 feed fuels for low burning.And when low combustion mode, control device 20 also improves by controlling door driving device 38 flow path resistance that air door 36 produces, allow air in air supply pipe 32 in the difficult state that circulates, thereby reduce the amount of the combustion air A be supplied to burner 17.During high combustion pattern, control device 20 is supplied with section 46 feed fuels from fuel for high combustion, and from high combustion with ejecting nozzle 50, in combustion chamber 12, allow the fuel combustion formation flame ejecting.Be exactly specifically, open high combustion magnetic valve 68, via the first branched pipe 62 to nozzle 50 feed fuels for high combustion.And when high combustion pattern, control device 20 reduces by controlling door driving device 38 flow path resistance that air door 36 produces, allow air in air supply pipe 32 in the state smoothly that circulates, thereby increase supply to the amount of the combustion air A of burner 17.Boiler 10 forms flame by burner 17 combustion fuels, with the combustion product gases that combustion fuel generates, water pipe is heated, and produces steam.
boiler 10 and combustion ejection device 16 are being switched to high combustion pattern by low combustion mode, or while being switched to low combustion mode by high combustion pattern, be exactly specifically when low combustion magnetic valve 74 switches between Kai Heguan, can allow low combustion magnetic valve 74 and switching solenoid valve 70 stay open state certain hour.Thus, can with nozzle 52 and high combustion, carry out smoothly the transition of flame between with nozzle 50 in low burning.Namely, when combustion mode is switched, can more effectively guarantee the continuation of fuel combustion.And, height combustion magnetic valve 68 and first branched pipe 62 of feed fuels during high combustion pattern are different systems, by arranging, can with nozzle 50, provide to high combustion switching solenoid valve 70 and second branched pipe 64 of small amount fuel, can reduce Fuel Consumption on one side, Yi Bian carry out swimmingly the transition of flame.
and boiler 10 and a kind of fuel injection device 16, when switch mode, are exactly when high combustion magnetic valve switches between Kai Heguan specifically, can allow high combustion magnetic valve 68 and switching solenoid valve 70 stay open state certain hour.Thus, the state of can maintenance supplying with to the fuel of high combustion nozzle 50 carries out opening or closing of high combustion magnetic valve 68 simultaneously.That is to say, when height combustion magnetic valve 68 will, by before opening and switching to pass, can first be opened switching solenoid valve 70, thereby guarantee still can use from switching solenoid valve 70 to high combustion nozzle 50 feed fuels after high combustion magnetic valve 68 has just cut out.Identical principle, before height combustion magnetic valve 68 will be switched to out by pass, can first open switching solenoid valve 70, thereby the high combustion of assurance magnetic valve 68 is first used nozzle 50 feed fuels from switching solenoid valve 70 to high combustion before will opening.Thus, no matter how magnetic valve opens or closes when pattern is switched, can guarantee the state that high combustion is supplied with in fuel with nozzle 50, thereby keep well the flame status of high combustion nozzle 50.
in addition, the bore of the second branched pipe 64 of boiler 10 and a kind of fuel injection device 16 is less than the first branched pipe 64, the mobile phase of fuel is to difficulty, even so work as, height fires magnetic valve 68 and switching solenoid valve 70 is both opened, simultaneously by the first branched pipe 62 and the second branched pipe 64 feed fuels, because the fuel of second branched pipe 64 of flowing through is restricted, therefore can effectively controls and be supplied to the increase of the fuel of nozzle 50 for high combustion.Moreover, by installing in throttling and connect 72 on the second branched pipe 64, allow fuel in being difficult for the state of circulation, thereby can limit better the fuel circulation in the second branched pipe 64 during feed fuels at the first branched pipe 62 and the second branched pipe 64 simultaneously.Thus, even if work as high combustion magnetic valve 68 and switching solenoid valve 70, all open feed fuels, fuel feed when its fuel feed and high combustion pattern can not have much difference yet, that is to say that not having superfluous fuel is supplied to nozzle 50 for high combustion, thereby can effectively suppress the harmful effect to high combustion nozzle 50.
and, because boiler 10 and a kind of fuel injection device 16 just can switch feed system by being arranged on height combustion magnetic valve 68 on the first branched pipe 64 and the first branched pipe 62 and the switch of switching solenoid valve 70, thus can allow device be configured simplify.
in addition, the utility model is also not only confined to above-described embodiment, within not departing from the scope of utility model aim, can carry out various distortion.High combustion magnetic valve 68, switching solenoid valve 70, low combustion magnetic valve 74 can be the open and close type valves that only can open or close, and can be also the control valves of adjusting aperture.

Claims (3)

1. a fuel injection device, it is characterized in that: comprise the first nozzle, the first fuel feed pipe being connected with described the first nozzle, be configured on described the first fuel feed pipe can switch the first valve, with described the first nozzle disposed adjacent and the second nozzle larger than described the first nozzle diameter, be connected with described second nozzle and than the second larger fuel feed pipe of described the first fuel feed pipe bore, the first branched pipe that the contrary end, end connecting with the described second nozzle of described the second fuel feed pipe connects, the contrary end, end connecting with the described second nozzle of described the second fuel feed pipe connects and second branched pipe larger than described the first branched pipe flow path resistance, be configured on described the first branched pipe can switch second valve, and be configured on described the second branched pipe can switch the 3rd valve.
2. a kind of fuel injection device according to claim 1, is characterized in that: on described the second branched pipe, configure in throttling and connect.
3. a kind of fuel injection device according to claim 1, is characterized in that: on described the first fuel feed pipe, described the first branched pipe and described the second branched pipe, directly or indirectly by other pipelines, connect fuel supply source.
CN201320717792.5U 2013-11-14 2013-11-14 Fuel injection device Expired - Lifetime CN203586258U (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
CN201320717792.5U CN203586258U (en) 2013-11-14 2013-11-14 Fuel injection device

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
CN201320717792.5U CN203586258U (en) 2013-11-14 2013-11-14 Fuel injection device

Publications (1)

Publication Number Publication Date
CN203586258U true CN203586258U (en) 2014-05-07

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ID=50584169

Family Applications (1)

Application Number Title Priority Date Filing Date
CN201320717792.5U Expired - Lifetime CN203586258U (en) 2013-11-14 2013-11-14 Fuel injection device

Country Status (1)

Country Link
CN (1) CN203586258U (en)

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C14 Grant of patent or utility model
GR01 Patent grant
CP03 Change of name, title or address
CP03 Change of name, title or address

Address after: 215024 Jiangsu province Suzhou Industrial Park South Lane 8

Patentee after: MIURA INDUSTRIES (CHINA) CO.,LTD.

Address before: 215024 Jiangsu Province, Suzhou City Industrial Park South Lane 8

Patentee before: Miura Industries (Suzhou) Co.,Ltd.

CX01 Expiry of patent term
CX01 Expiry of patent term

Granted publication date: 20140507