CN201925049U - Integral fuel gas sprayer assembly - Google Patents

Abstract

An integral fuel gas sprayer assembly comprises a main body, a primary and a secondary pressure reducing mechanisms and an isolating valve mechanism, wherein the main body comprises a primary and a secondary pressure reducing cavities, an isolating valve cavity and a main body throat cavity; all the cavities are communicated; the primary and the secondary pressure reducing mechanisms are respectively arranged in the primary and the secondary pressure reducing cavities and have similar structures; the isolating valve mechanism is arranged in the isolating valve cavity and comprises an isolating valve seat, a needle valve of the isolating valve, a diaphragm component of the isolating valve, a spring of the isolating valve, a cavity cover of the isolating valve and a spray nozzle of the isolating valve; the main body throat cavity is provided with an air inlet hole, and the spray nozzle of the isolating valve is positioned in the air inlet hole and extends into the main body throat cavity to communicate the isolating valve cavity and the main body throat cavity. By adopting the integral design, the integral fuel gas sprayer assembly has a more compact and reasonable structure, can be directly connected with the combustible gas sources such as domestic liquid gas, natural gas, marsh gas, and the like, requires no other auxiliary part, is convenient to mount, and is highly practical.

Description

A kind of integrated gas injector assembly

Technical field

The utility model relates to the gas injector assembly, is used for the motor fueling, belongs to machine power engineering field.

Background technique

Core constituent element---the motor of mechanical dynamic system, its significance is self-evident.And be divided into fuel injector (EFI or Carburetor) and gas injector today at energy growing tension as the sparger of engine fuel supply device, green energy resources such as the liquid gas of replacement traditional energy, rock gas, biogas more and more are subjected to people's favor, and gas injector is one of key device of gas engine gas ejecting system, and its performance quality directly has influence on the service behaviour of motor.

Gas injector is that gas nozzle and throttle operation mechanism combine by decompression voltage stabilizing mechanism.In order to control the input quantity of gas injector to cylinder, be implemented in the complicated load proper functioning of motor down, what existing gas injector generally adopted is by once decompression, voltage stabilizing, by entering engine combustion after nozzle and the trunnion air mixing, realize controlling the input quantity of combustion gas again.This structure has only one-level decompression, voltage stabilizing mechanism on the one hand, and on the market such as: thereby the original combustible gas pressure of liquid gas, rock gas, biogas is inconsistent to be caused through the pressure transient of combustible gas after the decompression voltage stabilizing, causes the inflammable gas motivation instability of flow of setting out indirectly.Be to reduce pressure once that pressure easily fluctuates after the voltage stabilizing, easily gas leakage on the other hand, poor stability.

In the gas injector of prior art, comprise: a, split type: the decompression voltage stabilizer in front, the back increases an accelerator open degree controller again, both connect by rubber pipe, here the rubber pipe between two parts is aging easily leaks gas, and the while takes up room greatly in the whole machine installation position; B, integrated type: enter engine combustion by nozzle and air mixing after the one-level decompression voltage stabilizing, it is bigger that this problem is that one-level decompression is influenced by the external air source gas pressure, cause pressure transient through combustible gas after the decompression voltage stabilizing, cause inflammable gas to enter the motor instability of flow indirectly, the combustible gas flow that enters motor can't be accurately controlled, also optimal air-fuel ratio can't be reached.

The model utility content

For solving the problems referred to above of prior art, the utility model provides a kind of integrated gas injector assembly, by integrated design, structure is compact and reasonable more, can directly be connected with combustible gas sources of the gas such as household liquified gas, rock gas, biogas, need not other accessory, easy for installation, practical.

Further, integrated gas injector assembly of the present utility model does not expose part, can not leak gas because of the gas connection pipe road is aging.

Further, integrated gas injector assembly of the present utility model be subjected to external source gas pressure influence less, through twice decompression voltage stabilizing, the pressure of combustible gas that enters body trunnion nozzle place again is more stable.

Further, integrated gas injector assembly of the present utility model can accurately be controlled the combustible gas flow that enters motor, thus the optimal air-fuel ratio that reaches.

For achieving the above object, a kind of integrated gas injector assembly that the utility model provides comprises body, the first order mechanism of decompressor, the second level mechanism of decompressor and cut-off valve mechanism; It is characterized in that: described body comprises first order decompression chamber, the second level decompression chamber that is communicated with described first order decompression chamber, the cut-off valve chamber that is communicated with described second level decompression chamber, the body trunnion chamber that is communicated with described cut-off valve chamber, described body trunnion chamber is communicated with engine air inlet tube; Between described each chamber by being arranged on described intrinsic channel connection; The described first order mechanism of decompressor is arranged in the described first order decompression chamber of described body, and comprising: inlet valve seat, a rocking arm are pivotably mounted on the described inlet valve seat, and an end of described rocking arm is provided with a valve gap; One decompression diaphragm unit, the other end of described rocking arm is connected on the described decompression diaphragm unit; One relief spring and relief chamber chamber cap, described relief chamber chamber cap are installed on the described body to seal described first order decompression chamber, and described relief spring is between described decompression diaphragm unit and described relief chamber chamber cap; The described second level mechanism of decompressor is arranged in the described second level decompression chamber of described body, and comprising: inlet valve seat, a rocking arm are pivotably mounted on the described inlet valve seat, and an end of described rocking arm is provided with a valve gap; One decompression diaphragm unit, the other end of described rocking arm is connected on the described decompression diaphragm unit; One relief spring and relief chamber chamber cap, described relief chamber chamber cap are installed in described body to seal described second level decompression chamber, and described relief spring is between described decompression diaphragm unit and described relief chamber chamber cap; Described cut-off valve mechanism is arranged in the described cut-off valve chamber of described body, comprising: cut off valve seat, described cut-off valve valve seat is provided with inlet hole and is communicated with described second level decompression chamber; One cuts off the needle valve, and one cuts off the valve film assembly, and described cut-off valve needle-valve is fixed on the described cut-off valve diaphragm unit; Cut-off valve spring and cut-off valve Pit cover, described Pit cover can be fixed on the described body to seal described cut-off valve chamber, and described spring is between described Pit cover and described cut-off valve diaphragm unit; One cuts off valve nozzle, and described cut-off valve nozzle is positioned at described cut-off valve chamber and is communicated with the place with described body trunnion chamber; Described body trunnion chamber has an inlet hole that is positioned on the described body, described cut-off valve nozzle is arranged in described inlet hole and stretches into described body trunnion chamber to be communicated with described cut-off valve chamber and described body trunnion chamber, described body trunnion chamber is divided into air cavity, mixed gas discharge side and therebetween trunnion part.

Compare with the gas injector of prior art, integrated gas injector assembly of the present utility model has the following advantages:

1. through twice or twice above decompression, the amplitude of each decompression is less, and the valve block of reduction valve and diaphragm area can design lessly like this, and the body that valve block and diaphragm are installed like this can design for a short time, can reduce manufacture cost.

2. incorporate design connects fuel gas path to each parts all in the die castings body interior, connects by the mode of processing pore-forming, does not expose part, so can not leak gas because of the gas connection pipe road is aging, improves reliability.

3. by integrated design, make product structure compact and reasonable more, can be directly be connected, need not other accessories with combustion gas such as household liquified gas, rock gas, the biogas flexible pipe of giving vent to anger, easy for installation, practical.

Brief description of drawings

Following with reference to accompanying drawing, preferred embodiment of the present utility model is made detailed description so that design of the present utility model and characteristics clearly are described, wherein:

Fig. 1 is the plan view of the integrated gas injector assembly of the utility model;

Fig. 2 is the worm's eye view of the integrated gas injector assembly of the utility model;

Fig. 3 is the working principle block diagram of the integrated gas injector assembly of the utility model;

Fig. 4 A-4E is the body stereogram of sparger assembly shown in Figure 1, with the working principle that each chamber in the body is shown and schematically represents the sparger assembly;

Fig. 5 is the sectional view that dissects along A-A line among Fig. 1, with the first order and the second level mechanism of decompressor of expression the utility model sparger assembly;

Fig. 5 A is the STRUCTURE DECOMPOSITION figure of the first order shown in Figure 5 and the second level mechanism of decompressor;

Fig. 6 is the sectional view that dissects along the B-B line among Fig. 1, with the first order of expression the utility model sparger assembly and the decompression voltage stabilizing controlling mechanism of the second level mechanism of decompressor;

Fig. 7 is the sectional view that dissects along the C-C line among Fig. 2, with the cut-off valve mechanism of reflection the utility model sparger assembly;

Fig. 8 is the STRUCTURE DECOMPOSITION figure of cut-off valve shown in Figure 7 mechanism;

Fig. 9 is that the cut-off valve that expression is used for cut-off valve mechanism is opened passage mechanism;

Figure 10 is the STRUCTURE DECOMPOSITION figure of decompression voltage stabilizing controlling mechanism shown in Figure 6.

Embodiment

As depicted in figs. 1 and 2, integrated gas injector assembly of the present utility model comprises body 1, the first order and second level reduction valve mechanism 2,3, cut-off valve mechanism 4 and closure trunnion mechanism 5.Integrated gas injector assembly of the present utility model is to finish the external source combustion gas in an integrated morphology, for example the second depressurized of liquid gas, rock gas, biogas and controlledly being transported in the body trunnion and air mixing is transported in the cylinder subsequently.Shown in the working principle schematic representation of Fig. 3 and Fig. 4 A-4E, the external source combustible gas, enter first order decompression chamber 11 as rock gas from the inlet hole I on the body 1, through entering second level decompression chamber 12 after the first order decompression, post-decompression gas enters cut-off valve chamber 13 through the second level, through 3 controls of cut-off valve mechanism, enters body trunnion chamber 14, with air mixing, the mixed gas discharge side outputs in the engine air inlet tube on body again.

Specifically ask for an interview shown in Fig. 4 A-4E, the body 1 of the utility model sparger assembly comprises first order decompression chamber 11, the second level decompression chamber 12 that is communicated with first order decompression chamber 11, the cut-off valve chamber 13 that is communicated with second level decompression chamber 12, the body trunnion chamber 14 that is communicated with cut-off valve chamber 13, body trunnion chamber 14 is communicated with engine air inlet tube.Be communicated with by the passage 15 (15a-15e) that is arranged in the body 1 between each chamber.Body 1 can be made integratedly by metal casting technique.

Referring to Fig. 1,5, shown in the 5A, the first order mechanism of decompressor 2 of the utility model sparger assembly is arranged in the first order decompression chamber 11 of body 1.External source gas, rock gas for example, by being arranged on the inlet hole I on the body, the passage 15 in body enters first order decompression chamber 11, passage 15 at the air inlet nozzle in the first order decompression chamber shown in label 15a.The first order mechanism of decompressor 2 comprises an inlet valve seat 21 near air inlet nozzle 15a setting, one rocking arm 22 is pivotably mounted on this inlet valve seat 21; end of rocking arm 22 is provided with a valve gap 23; valve gap 23 is provided with plug 231, and this plug 231 is about to air inlet nozzle when cooperating with air inlet nozzle 15a and closes hermetically.Utilize rubber material to make plug 231,, can reduce the machining accuracy of air inlet nozzle face, remedy error, and play good seal action because of component foozle and die castings like this by the plasticity of rubber material.

The first order mechanism of decompressor 2 also comprises a decompression diaphragm unit 24, this assembly has a decompression film 241, this decompression film 241 can be made by rubber film, top board 242 and press table 243 film 241 that will reduce pressure is clipped in therebetween, press table 243 is provided with a connecting sleeve 244, and the other end of above-mentioned rocking arm 22 is connected on this connecting sleeve 244.

The first order mechanism of decompressor 2 also comprises a relief spring 25 and relief chamber chamber cap 26, and relief chamber chamber cap 26 is installed on the body 1 with sealing first order decompression chamber 11 by screw.Relief spring 25 is between the top board 242 and relief chamber chamber cap 26 of decompression diaphragm unit 24.Relief spring 25 between top board 242 and relief chamber chamber cap 26 has predetermined initial pressure, the decompression film 241 that is sandwiched between top board 242 and the press table 243 is pushed away downwards, and then it is also downward to push away rocking arm 22 a connections end thereon, because of rocking arm 22 is to be connected in pivotly on the inlet valve seat 21, the valve gap 23 of rocking arm 22 the other ends promptly upwards opens air inlet nozzle 15a.

The initial pressure of relief spring 25 is set at and makes that in the normally-pressured neighbor of external source gas air inlet nozzle 15a is in normally open.When the external source gas pressure is higher than normal pressure, make the pressure in the first order decompression chamber 11 raise gradually, overcome the pressure of relief spring 25, the film 241 that will reduce pressure upwards pushes away, an end of the 244 drive rocking arms 22 of the connecting sleeve on the press table 243 is upwards at this moment; rocking arm 22 pivots; the valve gap 23 of its other end is coupled to downwards on the air inlet nozzle 15a; and air inlet nozzle 15a is closed; stop external source gas further to enter in the first order decompression chamber 11, make first order decompression chamber 11 interior pressure can keep basicly stable.

When the pressure in the first order decompression chamber 11 reduces along with the gas discharge, relief spring 25 is had an effect once more, it is downward to push away press table 243, and then the valve gap 23 that drives on the rocking arm 22 opens air inlet nozzle 15a, makes external source gas can enter first decompression chamber 11 again.

By the effect of the first order mechanism of decompressor 2, can carry out the first order to the external source gas pressure and regulate, make it keep stable basically.The first order outlet nozzle 15b of first order decompression chamber 11 is passed through in post-decompression combustion gas subsequently through the first order, and the passage 15 in body 1 enters second level decompression chamber 12.

As Fig. 1 and Fig. 5, shown in the 5A, the second level mechanism of decompressor 3 of the utility model sparger assembly is arranged in the second level decompression chamber 12 of body 1.The second level mechanism of decompressor 3 comprises an inlet valve seat 31 near air inlet nozzle 15c setting, one rocking arm 32 is pivotably mounted on this inlet valve seat 31; end of rocking arm 32 is provided with a valve gap 33; valve gap 33 is provided with plug 331, and this plug 331 is about to air inlet nozzle when cooperating with air inlet nozzle 15c and closes hermetically.Utilize rubber material to make plug 331,, can reduce the machining accuracy of air inlet nozzle face, remedy error, and play good seal action because of component foozle and die castings like this by the plasticity of rubber material.

The second level mechanism of decompressor 3 also comprises a decompression diaphragm unit 34, this assembly has a decompression film 341, this decompression film 341 can be made by rubber film, top board 342 and press table 343 film 341 that will reduce pressure is clipped in therebetween, press table 343 is provided with a connecting sleeve 344, and the other end of above-mentioned rocking arm 32 is connected in this connecting sleeve 344.

The second level mechanism of decompressor 3 also comprises a relief spring 35 and relief chamber chamber cap 36, and relief chamber chamber cap 36 is installed in body 1 with sealing second level decompression chamber 12 by screw.Relief spring 35 is between the top board 342 and relief chamber chamber cap 36 of decompression diaphragm unit 34.Relief spring 35 between top board 342 and relief chamber chamber cap 36 has predetermined initial pressure, the decompression film 341 that is sandwiched between top board 342 and the press table 343 is pushed away downwards, and then it is also downward to push away rocking arm 32 a connections end thereon, because of rocking arm 32 is to be connected in pivotly on the inlet valve seat 31, the valve gap 33 of rocking arm 32 the other ends promptly upwards opens air inlet nozzle 15c.

The initial pressure of relief spring 35 is set in the gas normally-pressured neighbor through decompression for the first time and makes air inlet nozzle 15c be in normally open.When pressure is higher than normal pressure, make the pressure in the second level decompression chamber 12 raise gradually, overcome the pressure of relief spring 35, the film 341 that will reduce pressure upwards pushes away, the end that this moment, the connecting sleeve 344 on the press table 343 drove rocking arms 32 is upwards; rocking arm 32 pivots; the valve gap 33 of its other end is coupled to downwards on the air inlet nozzle 15c; and air inlet nozzle 15c is closed; stop gas further to enter in the second level decompression chamber 12, make the pressure in the first group of decompression chamber of pressure ratio 11 in the second level decompression chamber 12 more stable.

Discharge along with gas and when reducing, relief spring 35 is had an effect once more when the pressure in the second level decompression chamber 12, it is downward to push away press table 343, and then the valve gap 33 that drives on the rocking arm 32 opens air inlet nozzle 15c, makes gas can enter second decompression chamber 12 again.

By the effect of the second level mechanism of decompressor 3, can carry out the second level to the external source gas pressure and regulate, make it further keep stable.Subsequently through the second level outlet nozzle 15d (as shown in Figure 7) of second level decompression chamber 12, the passage 15 in body 1 enters cut-off valve chamber 13 through the post-decompression combustion gas in the second level.

Fig. 1 for another example, 5A, Fig. 6 and shown in Figure 10 also is provided with a decompression voltage stabilizing controlling mechanism 6 in second level decompression chamber 13.Because the error effect of component foozle or pressure itself, existing ejector applications is often relatively poor in the adaptability of motor, and decompression voltage stabilizing controlling mechanism 6 provided by the utility model can be eliminated the error effect of component foozle or pressure itself, reach the conformity of decompression voltage regulation result when being applied to various motor, and can be according to the needs of every motor, the pressure that enters engine nozzle is finely tuned, eliminate the integrated gas injector of the utility model and make integrating error, guarantee best air fuel ratio.

Particularly, as Fig. 5 A, shown in 6 and 10, this decompression voltage stabilizing controlling mechanism 6 comprises pressure trimming assembly 61 and the auxiliary shutter device 62 of valve gap.Pressure trimming assembly 61 is included in and offers an interior threaded hole 361 on the second level relief chamber chamber cap 36, one hollow bolt 611 by screw-thread fit in this interior threaded hole 361, one end of hollow bolt 611 stretches into the inboard of relief chamber chamber cap 36, and the other end exposes in the outside of relief chamber chamber cap 36 and a nut 612 stubborn closing are thereon arranged.The internal diameter size of hollow bolt 611 is set at the relief spring 35 that can partly hold the second level mechanism of decompressor 3.In this embodiment, on the hollow bolt 611 outside thread is set, on the second level relief chamber chamber cap 36 internal thread is set, but one of ordinary skill in the art will appreciate that, also internal thread can be set on hollow bolt, on second level relief chamber chamber cap 36 outside thread is set, this variation belongs to the equivalent structure with previous embodiment.

When sparger of the present utility model need be applied to certain motor, on demand the combustible gas pressure that enters motor is finely tuned to adapt to this motor.At this moment, can change the extrusion of hollow bolt, thereby change the initial pressure that partly is contained in relief spring 35 wherein in relief chamber chamber cap 36 inboards by rotating nut 612 manually.

Valve gap assists shutter device 62 specifically as Fig. 6, shown in 10, comprises that one is opened in the through hole 621 on the body 1, and this through hole 621 connects second level decompression chamber 12 and body exterior.The part of through hole 621 is an interior threaded hole, and a hollow bolt 622 is engaged in this interior threaded hole.The internal diameter of hollow bolt 622 is set at and can holds an auxiliary end that opens and closes spring 623, and auxiliary spring 623 the other ends that open and close connect a connecting rod 624, and this connecting rod 624 is connected with rocking arm 32 again.This auxiliary spring 623 that opens and closes is arranged to its compression direction and valve gap 33 switching directional correlations, promptly when rocking arm 32 pressurizeds downwards and when pivotally opening valve gap 33, this auxiliary spring 623 that opens and closes is compressed the power effect, when rocking arm 32 is upwards drawn and when closing valve gap 33 by pivot, auxiliaryly open and close spring 623 effect of being under pressure.In through hole 621 close those parts of body 1 outside, be provided with a closeouts 625, after the initial position adjustment before hollow bolt 622 is dispatched from the factory, through hole 621 is sealed in order to avoid the combustible gas in the second level decompression chamber 12 leaks into outside the ejector body 1.

When sparger normally moves, valve gap 33 is in open mode all the time, this moment, the auxiliary spring 623 that opens and closes kept compressed state, when the pressure in the second level decompression chamber 12 slightly raises, the upborne pressure of decompression film 341 beginnings of the second level mechanism of decompressor upwards pushes away, this moment, rocking arm 32 also was pulled upwards, the auxiliary switching spring 623 that remain under the compressed state this moment is compressed by the effect of the connecting rod 624 that is connected with rocking arm 32, can be rapidly an end of rocking arm 32 be boosted, valve gap 32 is fallen rapidly and block air inlet nozzle 15c.When pressure reduces, by opposite effect power, and valve gap 32 is opened rapidly, thereby in the chamber of the second level, realized the decompression voltage regulation result better.

As Fig. 7, shown in 8,9, the cut-off valve mechanism 4 of the integrated sparger of the utility model is arranged in the cut-off valve chamber 13 of body 1.Cut-off valve mechanism 4 comprises cut-out valve seat 41, and this valve seat 41 is installed in the chamber ordinatedly with cut-off valve chamber 13 inwalls.One cuts off needle valve 42 is fixed on the cut-out valve film assembly 43.Cut-off valve diaphragm unit 43 comprises top board 431, press table 432 and be sandwiched in therebetween diaphragm 433.In the utility model, diaphragm is preferably to revolve the riveted joint mode and is sandwiched between the upper and lower pressing plate, can guarantee that like this diaphragm does not break away from working long hours, and is difficult for taking place gas leakage.

Cut-off valve mechanism 4 also comprises cut-off valve spring 44 and cut-off valve Pit cover 45, this Pit cover 45 can by screw on body 1 with sealing cut-off valve chamber 13, spring 44 and has default initial pressure between the top board 431 of Pit cover 45 and cut-off valve diaphragm unit 43.

Particularly more as shown in Figure 8, cut-off valve needle-valve 42 is made of needle 421 and valve rod 422, and needle 421 can be made of the cone rubber material in the present embodiment, and its diameter is less than the diameter of valve rod 422.Because the plasticity and the tapering of rubber material can intercept combustion gas and enter engine cavity under the idle situation of motor.Cut-off valve valve seat 41 has the stepped shape passage 411 that cooperates with needle 421 and valve rod 422, be provided with inlet hole 15e in cut-off valve valve seat 41 neutral positions, this inlet hole 15e is communicated with second level decompression chamber 12, can enter cut-off valve chamber 13 by this inlet hole 15e through the combustible gas after the second depressurized voltage stabilizing.

As shown in Figure 8, cut-off valve mechanism 4 comprises that also one cuts off valve nozzle 46, and this cut-off valve nozzle 46 is positioned at cut-off valve chamber 13 and is communicated with the place with body trunnion chamber 14.

The cut-off valve mechanism 4 of the integrated sparger of the utility model also opens passage mechanism 7 collaborative works with a cut-off valve.As Fig. 4 B, shown in 9, this cut-off valve is opened passage mechanism 7 and is made of negative pressure induction channels 71 and corner hole 72 particularly.Negative pressure induction channels 71 is opened on the body 1 of sparger, between the mixed gas discharge side 142 and cut-off valve Pit cover 45 of body trunnion chamber 14.Corner hole 72 is opened on the cut-off valve Pit cover 45, the bottom surface of cut-off valve Pit cover 45 is communicated with the inside portion of Pit cover 45, and when cut-off valve Pit cover 45 is installed on the body 1, corner hole 72 is communicated with negative pressure induction channels 71, thereby the inside portion of cut-off valve Pit cover 45 is communicated with the mixed gas discharge side 142 of body trunnion chamber 14.

Open passage mechanism 7 by above-mentioned cut-off valve, the mixed gas discharge side of cut-off valve chamber with air throttle trunnion chamber is communicated with, but the therefore negative pressure variation that whether starts of induction generator.When engine start, cut-off valve is opened the rising that passage mechanism 7 is sensed negative pressure, this moment is by the pressure that can overcome spring 44, make cut-off valve diaphragm unit 43 integral body move up (along the last side direction of Fig. 9), driving cut-off valve needle-valve 42 moves up, needle 421 lifts off a seat 41, until retreating to the middle inlet hole of pintle valve seat top, inlet hole 15e on the pintle valve seat is opened fully at this moment, the combustible gas that comes from the second level decompression chamber 12 enters cut-off valve chamber 13, enters body trunnion chamber 14 by cut-off valve nozzle 46.When motor quits work, mixed gas discharge side 142 has not had negative pressure, by negative pressure induction channels 71, this negative pressure can be reflected in the cut-off valve chamber, make under the positive pressure increase and the acting in conjunction of cut-off valve return spring of cut-off valve chamber, promote cut-off valve diaphragm unit 43 integral body move down (along the lower side of Fig. 9 to), driving cut-off valve needle-valve 42 moves down, needle 421 is resisted against on the valve seat 41, and valve rod 422 be positioned at stepped shape passage 411 than the major diameter part, stop combustible gas to enter body trunnion place and cut-off valve chamber, cut off the supply of combustible gas.

The cut-off valve that employing is arranged in the ejector body 1 is opened passage mechanism 7, realized each parts are connected the fuel gas path integrated setting in body 1 inside that die casting forms, do not expose part, can not leak gas, improved the reliability of sparger because of the gas connection pipe road is aging.

By the effect of cut-off valve mechanism 4, the combustible gas after the decompression voltage stabilizing enters body trunnion chamber 14 by nozzle 46.Shown in Fig. 4 E and 9, the body trunnion chamber 14 of the utility model sparger has an inlet hole 15f who is positioned on the body 1, and cut-off valve nozzle 46 is positioned at this inlet hole 15f and stretches into body trunnion chamber 14 inside.Body trunnion chamber 14 is less and constitute trunnion part 143 corresponding to the position sectional area of inlet hole 15f, both sides in this trunnion part constitute air cavity 141 and mixed gas discharge side 142 respectively, wherein air cavity 141 is connected with the air-strainer (not shown), and mixed gas discharge side 142 is connected with the engine air inlet tube (not shown).The combustible gas that comes from cut-off valve chamber 13 enters trunnion part 143, this with from the air mixing of air-strainer, through the throttle opening control of mixed gas discharge side the inside again in engine air inlet tube, for engine operation.

Also be provided with throttle mechanisms 5 in body trunnion chamber 14, this mechanism 5 comprises chock plate assembly 51 that is arranged in air cavity 141 and the air throttle component 52 that is arranged in mixed gas discharge side 142.

Under low-temperature condition, the air inlet amount during chock plate assembly 51 may command engine starts, thus motor can normally be started under low-temperature condition.Particularly as shown in Figure 9, chock plate assembly 51 comprises chock plate sheet 511, this chock plate sheet 511 is installed on the Air strangler spindle 512, door-hinge 512 is installed on the ejector body 1 pivotly, one is positioned at the pivot of the door-hinge handle 513 may command door-hinges of body 1 outside, along with the rotation of door-hinge 512, chock plate sheet 511 apertures change.Under the normal temperature state of motor (under the normal temperature), chock plate sheet 511 turns to the state of maximum opening, and air can be entered in the air cavity swimmingly.Under low-temperature condition during ato unit, handle with sleeve 513 makes a sheet 511 turn over several angle, reduces the air inlet amount, increases the concentration of combustible gas in the mixed gas, guarantees that motor starts smoothly as need.

Again as shown in Figure 9, air throttle component 52 comprises throttle blade 521, this throttle blade 521 is installed on the throttle plate pin 522, door-hinge 522 is installed on the ejector body 1 pivotly, one is positioned at the pivot of the door-hinge handle 523 may command door-hinges of body 1 outside, and this handle is connected with the engine throttle gate operator.When load changes in the engine working process, the engine throttle gate operator drives handle and rotates, and door-hinge 522 is pivoted, regulate the aperture of throttle blade 521, increase or reduce the throughput of mixed gas, thereby change the discharge capacity of mixed gas, satisfy the needs that engine loading changes.

Below in conjunction with the accompanying drawings detailed description has been made in the preferred embodiment of the integrated gas injector of the utility model.One of ordinary skill in the art will appreciate that; in design scope of the present utility model, can also make change to this embodiment; for example can increase decompression voltage stabilizing progression to obtain more stable combustible gas or the like, still be appreciated that in these protection domains that change the appended claims that all lands.

Claims (23)

1. an integrated gas injector assembly comprises body (1), the first order mechanism of decompressor (2), the second level mechanism of decompressor (3) and cut-off valve mechanism (4); It is characterized in that:

Described body (1) comprises first order decompression chamber (11), the second level decompression chamber (12) that is communicated with described first order decompression chamber (11), the cut-off valve chamber (13) that is communicated with described second level decompression chamber (12), the body trunnion chamber (14) that is communicated with described cut-off valve chamber (13), described body trunnion chamber (14) is communicated with engine air inlet tube; Be communicated with by the passage (15) that is arranged in the described body (1) between described each chamber;

The described first order mechanism of decompressor (2) is arranged in the described first order decompression chamber (11) of described body (1), comprise: inlet valve seat (21), one rocking arm (22) is pivotably mounted on the described inlet valve seat (21), and an end of described rocking arm (22) is provided with a valve gap (23); One decompression diaphragm unit (24), the other end of described rocking arm (22) is connected on the described decompression diaphragm unit; One relief spring (25) and relief chamber chamber cap (26), described relief chamber chamber cap (26) is installed in described body (1) and goes up to seal described first order decompression chamber (11), and described relief spring (25) is positioned between described decompression diaphragm unit (24) and the described relief chamber chamber cap (26);

The described second level mechanism of decompressor (3) is arranged in the described second level decompression chamber (12) of described body (1), comprise: inlet valve seat (31), one rocking arm (32) is pivotably mounted on the described inlet valve seat (31), and an end of described rocking arm (32) is provided with a valve gap (33); One decompression diaphragm unit (34), the other end of described rocking arm (32) is connected on the described decompression diaphragm unit; One relief spring (35) and relief chamber chamber cap (36), described relief chamber chamber cap (36) is installed in described body (1) to seal described second level decompression chamber (12), and described relief spring (35) is positioned between described decompression diaphragm unit (34) and the described relief chamber chamber cap (36);

Described cut-off valve mechanism (4) is arranged in the described cut-off valve chamber (13) of described body (1), comprising: cut off valve seat (41), described cut-off valve valve seat (41) is provided with inlet hole (15e) and is communicated with described second level decompression chamber (12); One cuts off needle valve (42), and one cuts off valve film assembly (43), and described cut-off valve needle-valve (42) is fixed on the described cut-off valve diaphragm unit (43); Cut-off valve spring (44) and cut-off valve Pit cover (45), described Pit cover (45) can be fixed on described body (1) and go up to seal described cut-off valve chamber (13), and described spring (44) is positioned between described Pit cover (45) and the described cut-off valve diaphragm unit (43); One cuts off valve nozzle (46), and described cut-off valve nozzle (46) is positioned at described cut-off valve chamber (13) and is communicated with the place with described body trunnion chamber (14);

Described body trunnion chamber (14) has an inlet hole (15f) that is positioned on the described body (1), described cut-off valve nozzle (46) is arranged in described inlet hole (15f) and stretches into described body trunnion chamber (14) to be communicated with described cut-off valve chamber (13) and described body trunnion chamber (14), described body trunnion chamber is divided into air cavity (141), mixed gas discharge side (142) and therebetween trunnion part (143).

2. integrated gas injector assembly as claimed in claim 1 is characterized in that described body is made into integration by die cast metal technology.

3. integrated gas injector assembly as claimed in claim 1 or 2, it is characterized in that, the described valve gap (23) of the described first order mechanism of decompressor (2) is provided with plug (231), and described plug (231) can cooperate with the air inlet nozzle (15a) that is arranged in described first order decompression chamber (12).

4. integrated gas injector assembly as claimed in claim 1 or 2, it is characterized in that, the described decompression membrane module (24) of the described first order mechanism of decompressor (2) has a decompression film (241), top board (242) and press table (243), described decompression film (241) is clipped between the described upper and lower pressing plate, described press table (243) is provided with a connecting sleeve (244), and the other end of described rocking arm (22) is connected in the described connecting sleeve (244).

5. integrated gas injector assembly as claimed in claim 1 or 2 is characterized in that, described relief spring (25) is positioned between the top board (242) and described relief chamber chamber cap (26) of described decompression diaphragm unit (241).

6. integrated gas injector assembly as claimed in claim 1 or 2, it is characterized in that, the described valve gap (33) of the described second level mechanism of decompressor (3) is provided with plug (331), and described plug (331) can cooperate with the air inlet nozzle that is arranged in second level decompression chamber (13) (15c).

7. integrated gas injector assembly as claimed in claim 1 or 2, it is characterized in that, the described decompression membrane module (34) of the described second level mechanism of decompressor (3) has a decompression film (341), top board (342) and press table (343), described decompression film (341) is clipped between the described upper and lower pressing plate, described press table (343) is provided with a connecting sleeve (344), and the described the other end of stating rocking arm (32) is connected in the described connecting sleeve (344).

8. integrated gas injector assembly as claimed in claim 1 or 2 is characterized in that, described relief spring (35) is positioned between the top board (342) and described relief chamber chamber cap (36) of described decompression diaphragm unit (341).

9. integrated gas injector assembly as claimed in claim 1 or 2 is characterized in that, cooperates with the inwall of described cut-off valve chamber (13) when the valve seat (41) of described cut-off valve mechanism (4) is installed on described cut-off valve chamber (13).

10. integrated gas injector assembly as claimed in claim 1 or 2 is characterized in that described cut-off valve diaphragm unit (43) comprises top board (431), press table (432) and be sandwiched in therebetween diaphragm (433).

11. integrated gas injector assembly as claimed in claim 10 is characterized in that described diaphragm (433) is sandwiched between the described upper and lower pressing plate (431,432) in the riveted joint mode.

12. integrated gas injector assembly as claimed in claim 1 or 2 is characterized in that, described cut-off valve spring (44) is positioned between the top board (431) of described Pit cover (45) and described cut-off valve diaphragm unit (43).

13. integrated gas injector assembly as claimed in claim 1 or 2, it is characterized in that, described cut-off valve needle-valve (42) is made of needle (421) and valve rod (422), and described needle (421) is made of the cone rubber material, and its diameter is less than the diameter of described valve rod (422); Described cut-off valve valve seat (41) has the stepped shape passage (411) that cooperates with described needle (421) and described valve rod (422).

14. integrated gas injector assembly as claimed in claim 1 or 2, it is characterized in that, also be provided with throttle mechanisms (5) in the described body trunnion chamber (14), described mechanism (5) comprises chock plate assembly (51) that is arranged in described air cavity (141) and the air throttle component (52) that is arranged in described mixed gas discharge side (142).

15. integrated gas injector assembly as claimed in claim 14, it is characterized in that, described chock plate assembly (51) comprises chock plate sheet (511), described chock plate sheet (511) is installed on the Air strangler spindle (512), described door-hinge (512) is installed on the described ejector body (1) pivotly, and one is positioned at the pivot of outside door-hinge handle (513) the may command door-hinge of described body (1).

16. integrated gas injector assembly as claimed in claim 14, it is characterized in that, described air throttle component (52) comprises throttle blade (521), described throttle blade (521) is installed on the throttle plate pin (522), described door-hinge (522) is installed on the described ejector body (1) pivotly, and one is positioned at the pivot of outside door-hinge handle (523) the may command door-hinge of described body (1).

17. integrated gas injector assembly as claimed in claim 16 is characterized in that described door-hinge handle (523) is controlled by the engine throttle gate operator.

18. integrated gas injector assembly as claimed in claim 1 or 2 is characterized in that, described second level decompression chamber (13) also is provided with a decompression voltage stabilizing controlling mechanism (6), and comprising: pressure trimming assembly (61) and/or valve gap are assisted shutter device (62).

19. integrated gas injector assembly as claimed in claim 18, it is characterized in that, described pressure trimming assembly (61) is included in and offers an interior threaded hole (361) on the described second level relief chamber chamber cap (36), one hollow bolt (611) is engaged in the described interior threaded hole (361), one end of described hollow bolt (611) stretches into the inboard of described second level relief chamber chamber cap (36), and the other end exposes in the outside of described second level relief chamber chamber cap (36) and has a nut (612) to twist and closes thereon.

20. integrated gas injector assembly as claimed in claim 19 is characterized in that, the internal diameter size of described hollow bolt (611) is set at the described relief spring (35) that can partly hold the described second level mechanism of decompressor (3).

21. integrated gas injector assembly as claimed in claim 18, it is characterized in that, described valve gap assists shutter device (62) to comprise that one is opened in the through hole (621) on the described body (1), described through hole (621) connects described second level decompression chamber (12) and described body exterior, the part of described through hole (621) is an interior threaded hole, one hollow bolt (622) is engaged in the described interior threaded hole (621), the internal diameter of described hollow bolt (622) is set at auxiliary spring (623) one ends that open and close and is contained in wherein, auxiliary spring (623) the other end that opens and closes connects a connecting rod (624), described connecting rod (624) is connected with described rocking arm (32) again, and its compression direction is arranged to by described auxiliary switching spring (623) and described valve gap (33) opens and closes directional correlation.

22. integrated gas injector assembly as claimed in claim 1 or 2, it is characterized in that, comprise that also one opens passage mechanism (7) with the cut-off valve of described cut-off valve mechanism (4) collaborative work, described cut-off valve is opened passage mechanism (7) by negative pressure induction channels (71) and corner hole (72) formation.

23. integrated gas injector assembly as claimed in claim 22, it is characterized in that, described negative pressure induction channels (71) is opened on the described ejector body (1), is positioned between the mixed gas discharge side (142) and described cut-off valve Pit cover (45) of described body trunnion chamber (14); Described corner hole (72) is opened on the described cut-off valve Pit cover (45), the bottom surface of described cut-off valve Pit cover (45) is communicated with the inside portion of described Pit cover (45), and when described cut-off valve Pit cover (45) is installed on the described body (1), described corner hole (72) is communicated with described negative pressure induction channels (71), and the inside portion of described cut-off valve Pit cover (45) is communicated with the mixed gas discharge side (142) of described body trunnion chamber (14).

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