CN2779085Y

CN2779085Y - Combustion gases mixer of natural gas electric generator

Info

Publication number: CN2779085Y
Application number: CN 200520101515
Authority: CN
Inventors: 张水勇; 袁学才; 陈国栋
Original assignee: Zhejiang Wanfeng Technology Development Co Ltd
Current assignee: Zhejiang Wanfeng Technology Development Co Ltd
Priority date: 2005-04-08
Filing date: 2005-04-08
Publication date: 2006-05-10
Anticipated expiration: 2015-04-08

Abstract

The utility model relates to a combustion gas mixer used for natural gas generators, which comprises a casing and a core body fixed in the casing, wherein the inner channel of the core body is a section variable channel which is small in the middle and is big in both ends; the middle part at the outer side of the core body is provided with a circling groove which is communicated with the inner channel of the core body through a plurality of radial small through holes arranged on the middle section of the core body; the casing is provided with a combustion gas inlet communicated with the circling groove. The utility model has the advantages of uniform mixing of combustion gases, simple structure, low cost and easy fabrication, and is suitable for the natural gas generators refitted from combustion oil generators.

Description

The natural gas generator fuel gas mixer

Technical field

The utility model relates to a kind of generator fuel gas mixer.

Background technique

Existing small generator mostly is fuel combustion type, because the product oil price rises steadily in recent years, and there is abundant natural gas resource in China, is the new way that the small generator of fuel has become reasonable energy utilization so develop with the rock gas.The internal channel of its fuel gas mixer core body of existing natural gas generator is generally prismatic hole, the air inflow of regulating rock gas by the degree of vacuum of motor, this structural gap entrance friction is big, combustion gas mixing is insufficient, and some special-purpose gas fuel mixers can guarantee that the sky combustion volume ratio of mixed gas is certain, but complex structure, the cost height, the dismounting inconvenience only is applicable to custom-designed gas engine, and is not suitable for the gas electricity generator of fuel electric generator repacking.

The model utility content

It is a kind of simple in structure that the purpose of this utility model is to provide, and the air intlet resistance is little, the uniform generator fuel gas mixer of combustion gas mixing.

For achieving the above object, the technological scheme that the utility model adopted is: a kind of natural gas generator fuel gas mixer, comprise housing and be fixed on the interior core body of housing, the internal channel of described core body is a variable cross section passage big in the end and small in the middle, middle side part is provided with annular recess outside described core body, the internal channel of described core body and described annular recess by be located at the core body stage casing several radially small through hole be communicated with, on described housing, be provided with gas inlet and be communicated with described annular recess.

As an optimal way of the present utility model, the internal channel air inlet place cross section size of described core body is 1.1～1.2 times of internal channel mixed gas outlet place cross section size.

As an optimal way of the present utility model, the described radially small through hole five equilibrium distribution ringwise that is located at the core body stage casing.

As further improvement of the utility model, on described housing, be provided with the mounting hole of two symmetries.

The utility model is owing to adopt technique scheme, by fairshaped variable cross section internal channel design, the air intlet resistance is reduced greatly, the small through hole that distributes by branches such as annulars designs, the assurance air feed is unimpeded, combustion gas mixing is even, thereby and control the purpose of delivery volume of the size control rock gas of negative pressure by the size that changes the door opening on the Carburetor, and utilize the utility model can be easy to repack fuel electric generator into gas electricity generator, the utility model is simple in structure, easy to process, cost is low, and market prospects are wide.

Description of drawings

Fig. 1 is the mixer structure schematic representation;

Fig. 2 is the mixer sectional view;

Fig. 3 is the core body sectional view;

Embodiment

As shown in the figure, the natural gas generator fuel gas mixer, it is characterized in that: described gas electricity generator fuel gas mixer comprises housing 2 and is fixed on core body 3 in the housing 2, the internal channel 31 of described core body 3 is a variable cross section passage big in the end and small in the middle, middle side part is provided with annular recess 32 outside described core body 3, the internal channel 31 of described core body 3 and described annular recess 32 by be located at core body 3 stage casings several radially small through hole 5 be communicated with, on described housing, be provided with gas inlet 4 and be communicated with described annular recess 32.The internal channel air inlet place 33 cross section sizes of core body 3 are 1.1～1.2 times of internal channel mixed gas outlet place 34 cross section sizes, are located at the radially small through hole 5 five equilibrium distribution ringwise in core body 3 stage casings, and housing 2 is provided with the mounting hole 1 of two symmetries.

The utility model is installed in the air-strainer box body by mounting hole 1, and fuel gas inlet place 4 connects a joint and is connected with the gas cylinder reduction valve.When generator starting, 5 places produce a negative pressure at small through hole, and the size of negative pressure is directly being controlled the delivery volume of combustion gas.Under the effect of negative pressure, combustion gas enters engine and carburetor by mixed gas outlet 34 after entering internal channel and air mixing by small through hole 5.In this process, air stream entrance friction when core body 3 internal channels of variable cross section is little, and the small through hole 5 that distributes on the ring surface is the oblique section design, makes combustion gas to enter core body 3 internal channels by each small through hole 5, guarantees that air feed is unobstructed, and combustion gas mixing is even.

By embodiment of the present utility model, realized a kind of easy to install, reasonable in internal structure, cost is low, the uniform mixer of combustion gas mixing.

Claims

1, natural gas generator fuel gas mixer, it is characterized in that: described generator fuel gas mixer comprises housing (2) and is fixed on the interior core body (3) of housing (2), the internal channel (31) of described core body (3) is a variable cross section passage big in the end and small in the middle, middle side part is provided with annular recess (32) outside described core body (3), the internal channel (31) of described core body (3) and described annular recess (32) by be located at core body (3) stage casing several radially small through hole (5) be communicated with, on described housing, be provided with gas inlet (4) and be communicated with described annular recess (32).

2, natural gas generator fuel gas mixer according to claim 1, it is characterized in that: internal channel air inlet place (33) the cross section size of described core body (3) is 1.1～1.2 times of internal channel mixed gas outlet place (34) cross section size.

3, natural gas generator fuel gas mixer according to claim 1 is characterized in that: the described radially small through hole (5) that is located at core body (3) stage casing five equilibrium ringwise distributes.

4, natural gas generator fuel gas mixer according to claim 1 is characterized in that: the mounting hole (1) that is provided with two symmetries on described housing (2).