CN202117797U

CN202117797U - Gas mixer with gas compensation branch

Info

Publication number: CN202117797U
Application number: CN2011201951186U
Authority: CN
Inventors: 张海辉
Original assignee: Individual
Current assignee: Individual
Priority date: 2011-06-11
Filing date: 2011-06-11
Publication date: 2012-01-18
Anticipated expiration: 2021-06-11

Abstract

The utility model discloses a gas mixer with a gas compensation branch, which comprises a mixer body, a proportional control device, a mixing cavity and a main gas inlet, wherein the proportional control device, the mixing cavity and the main gas inlet are arranged in the mixer. The main gas inlet is communicated with the mixing cavity through the proportional control device. The gas mixer with the gas compensation branch is characterized in that an auxiliary gas inlet is arranged on the mixer body and communicated with the mixing cavity. The gas mixer with the gas compensation branch has the advantages that an auxiliary gas inlet channel is additionally arranged based on an existing single gas inlet channel and function of passive adjustment of mixing proportion of the gas in an existing mixer, and the channel serves as the compensation branch of a main gas inlet channel. A stepping motor or a proportion electro-magnet control valve core is used to perform slide control of the opening of the auxiliary gas inlet channel, and a mixing adjustment method of active adjustment and passive adjustment of mixing proportion of gas in the mixer is achieved.

Description

The fuel gas mixer of band combustion gas compensation branch road

Technical field

The utility model relates to a kind of mixer, relates in particular to a kind of fuel gas mixer with combustion gas compensation branch road.

Background technique

The function of existing fuel gas mixer is in not having fixed ratio to mix with air and combustion gas; Because air and blast tube are all fixed in the mixer, because of the air of the mixed gas that after mixer mixing, forms than air and combustion gas and the volume ratio of combustion gas are fixed.

Present fuel gas mixer has two kinds:

1) combustion gas ratio is regulated mixer: set inside has the mixing chamber that supplies combustion gas and air mixing, and the combustion gas passing ratio of outside input gets into mixing chamber after regulating the mixer spool, and ratio is regulated the effect that the mixer spool plays the adjustments of gas mixed proportion; But the air after ratio is regulated the adjusting of mixer spool and the volume ratio of combustion gas are fixed.

2) Venturi tube mixer: be provided with the mixing chamber that supplies combustion gas and air mixing equally; It is the venturi mixing chamber; After combustion gas gets into the outer gas only chamber of Venturi tube internal chamber wall; In venturi chamber, mix with air through a plurality of gas outlet ejections of setting up on the internal chamber wall, the air after the Venturi tube mixer is regulated and the volume ratio of combustion gas are also fixed again.

The best combustion effect that reaches in the gas engine cylinder needs according to different power conditions air fuel ratio to be controlled, and its essential implication is meant the mass ratio of air and combustion gas, rather than volume ratio.Gas engine and gas combustion automobile use the region broad; Height above sea level, latitude, etc. factor cause circumstance of temperature difference big; Make the density of mass (volume of unit mass) of air change huge; And that the fuel gases calorific value component also causes the density of mass (volume of unit mass) of combustion gas to change with place of production difference is huge, on the therefore present mechanical mixer fixedly the air of latus rectum and blast tube can only realize that the volume ratio of fixing mixes, and the best sky that can not realize ideal fires the mass ratio mixing.Therefore, the need to increase electric mixer ways to compensate for the amount of gas input adjustment, improve air-fuel ratio control quasi accuracy.

The model utility content

To the problem in the background technique; The utility model provides a kind of fuel gas mixer with combustion gas compensation branch road; It comprises the mixer body, is arranged on ratio control device, mixing chamber and combustion gas primary air inlet in the mixer, is communicated to mixing chamber after the combustion gas primary air inlet passing ratio controlling device; Its improvement is: also be provided with the combustion gas auxilairy air intake on the mixer body, the combustion gas auxilairy air intake directly is communicated with mixing chamber.

Said mixer also is provided with an electrically-controlled valve outward, the aperture of electrically-controlled valve control combustion gas auxilairy air intake.

The electrically controlled valve spool using stepper motors Ge proportional solenoid driven, auxiliary gas inlet opening degree for smooth control.

Said ratio control device is that ratio is regulated mixer spool or Venturi tube (being Venturi tube).

This has the beneficial effect of technology: the existing mixer has a single inlet, passive gas mixing ratio adjustment feature, based on increased gas auxiliary air intake passage which compensation as the main inlet branch, Ge by a stepping motor controlled proportional solenoid valve on the gas intake passage assist smooth opening degree control, the gas mixer and the mixing ratio of active regulation hybrid combination of passive alignment adjustment method.

Description of drawings

Fig. 1, existing diaphragm type mixer structure schematic representation;

Fig. 2, press the diaphragm type mixer structure schematic representation after the utility model scheme is improved;

Fig. 3, existing Venturi tube mixer structural representation;

Fig. 4, press the Venturi tube mixer structural representation after the utility model scheme is improved.

Embodiment

As shown in Figure 1; The mixing chamber 1-3 passing ratio of existing diaphragm type mixer is regulated the mixer spool and is connected with combustion gas primary air inlet 1-1; When the air pressure at combustion gas primary air inlet 1-1 place and the air pressure in the mixing chamber 1-3 are uneven; Ratio is regulated mixer spool 1-4 and is being realized unlatching, closing operation under the effect of air pressure and spring: when the air pressure in the mixing chamber 1-3 is lower than the air pressure at combustion gas primary air inlet 1-1 place; Ratio is regulated mixer spool 1-4 by the combustion gas jack-up at combustion gas primary air inlet 1-1 place, and the inlet of increase gas is when the air pressure balance at air pressure in the mixing chamber 1-3 and combustion gas primary air inlet 1-1 place; Ratio is regulated mixer spool 1-4 return under the effect of spring, and air inflow reduces; Existing mixer is realized the passive adjusting to the example of the gas mixture ratio in the mixing chamber 1-3 through aforesaid working method.

Existing Venturi tube mixer is as shown in Figure 3; The Venturi tube inner chamber is communicated with mixing chamber 1-3; The Venturi tube outer wall encloses cavity A with the mixer body and is communicated with combustion gas primary air inlet 1-1, and the Venturi tube tube wall is provided with a plurality of combustion gas spout 1-5, after combustion gas gets into cavity A; Get into mixing chamber 1-3 through combustion gas spout 1-5, its Principles of Regulation are; Along with the burning consumption of combustion gas, form negative pressure in the mixing chamber 1-3, combustion gas is sucked to combustion gas spout 1-5 from cavity A get into mixing chamber 1-3, realize passive adjusting to the gas mixture ratio example.

The something in common of existing diaphragm type mixer and Venturi tube mixer is: combustion gas all need be passed through ratio control device 1-4, and could to get into mixing chamber 1-3 (be that the combustion gas inlet air pathway is single; Perhaps, a plurality of combustion gas primary air inlet 1-1 are arranged on the mixer body; But all need pass through ratio control device 1-4 could be communicated with mixing chamber 1-3); And the size relative fixed of ratio control device 1-4 (being that Venturi tube and ratio are regulated the mixer spool); Can only regulate the volume ratio of combustion gas and air in the fixed volume ratio, be difficult to adapt to the polytrope of gas temperature, density and engine operating condition.

Referring to Fig. 2,4, the utility model is improved to what aforesaid two kinds of mixer structures were done: a combustion gas auxilairy air intake 1-2 is set on the mixer body, and combustion gas auxilairy air intake 1-2 directly is communicated with mixing chamber 1-3; Through after this improvement, can carry out active adjustment to the gas mixture ratio example through combustion gas auxilairy air intake 1-2, combustion gas is delivered directly to mixing chamber 1-3, directly change the mixed proportion of gas.

Further, on aforesaid improvement basis, a kind of preferred version of regulating ratio of gas mixture that the utility model adopted is: said mixer also is provided with an electrically-controlled valve outward, the aperture of electrically-controlled valve control combustion gas auxilairy air intake 1-2.

Further, the electric control valve drive mechanism using the stepping motor Ge proportional solenoid (Ge proportional solenoid stepper motor position in the structure shown in Figure 2, Figure 4 in the position shown numeral 4), the electrically controlled valve Spool 3 Ge proportional solenoid by a stepping motor drive, the gas auxiliary inlet opening 1-2 degrees for smooth control.

After the utility model improvements, gas inlet 1-2 as auxiliary gas inlet 1-1 main branches of compensation, when proportional control valve 1-4 mixer still unable to fully open the mixing chamber a rapidly changing -3 proportion of gas inside, or when the air density, proportional control valve 1-4 mixer gas volume is not turned on, but obviously not enough, the stepper motor Ge proportional solenoid control valve 3 opens the gas through the gas-assisted Inlet 1-2 1-3 directly into the mixing chamber, the rapid changes in the gas mixing chamber 1-3 ratio to achieve the proportion of active regulation of the gas.

Stepper motor was chosen as a control mechanism Ge proportional solenoid, because the stepper motor Ge proportional solenoid with high control accuracy can be continuously adjusted advantage.In addition, electrically-controlled valve and mixer can adopt integrated form (common housing), combined type (housing with bolt connect as one) separated type (being connected with pipeline).

Among them, the auxiliary gas inlet 1-2 and 1-1 inlet gas main pipeline 2 and a connecting portion can be constructed by a special structure, the structure and the stepper motor and the spool 3 Ge with proportional solenoid form an integral structure, the overall structure of the mixer can be realized on existing rapid transformation.

Claims

1. fuel gas mixer with combustion gas compensation branch road; It comprises the mixer body; Be arranged on ratio control device (1-4), mixing chamber (1-3) and combustion gas primary air inlet (1-1) in the mixer; Be communicated to mixing chamber (1-3) after combustion gas primary air inlet (1-1) the passing ratio controlling device (1-4), it is characterized in that: also be provided with combustion gas auxilairy air intake (1-2) on the mixer body, combustion gas auxilairy air intake (1-2) is communicated with mixing chamber (1-3).

2. the fuel gas mixer of band combustion gas compensation branch road according to claim 1, it is characterized in that: said mixer also is provided with an electrically-controlled valve outward, the aperture of electrically-controlled valve control combustion gas auxilairy air intake (1-2).

3 according to claim 2, wherein a gas with gas compensation branch mixer, characterized in that: said electrically controlled valve spool (3) by a stepping motor electrically controlled proportional solenoid valve Ge driven, the gas assisted Inlet (1-2) for smooth control the opening degree.

4. the fuel gas mixer of band combustion gas compensation branch road according to claim 1 is characterized in that: said ratio control device (1-4) is regulated mixer spool or Venturi tube for ratio.