CN212583840U

CN212583840U - Layered scavenging carburetor body

Info

Publication number: CN212583840U
Application number: CN202021280808.7U
Authority: CN
Inventors: 韩一荣; 郑节昭; 周勇; 雷祥雨
Original assignee: Individual
Current assignee: Individual
Priority date: 2020-07-02
Filing date: 2020-07-02
Publication date: 2021-02-23
Anticipated expiration: 2030-07-02

Abstract

The utility model discloses a layering scavenging carburetor body, including the carburetor body, be provided with the inlet channel of venturi form on the carburetor body, be provided with oblique baffle in venturi throat department, oblique baffle slope setting and both ends integrated into one piece fixed connection to in the venturi inner wall, oblique baffle lower surface with venturi encloses the synthetic gas mixture passageway to one side down the inner wall, oblique baffle upper surface with venturi goes up the inner wall to one side and encloses the synthetic air passageway. The utility model discloses layering scavenging carburetor body, the oblique baffle and the carburetor body integrated into one piece of layering usefulness have reduced the processing cost, and stability is better moreover.

Description

Layered scavenging carburetor body

Technical Field

The utility model relates to a carburetor technical field, more specifically the utility model relates to a layering scavenging carburetor body that says so.

Background

The universal small gasoline engine is widely used for motor-driven spraying and dusting machines, chain saws, generators, water pumps and lawn mowers. The annual output of the small gasoline engines all over the world is about 4500 thousands of gasoline engines. From 2010, the output of the universal small gasoline engine in China reaches more than 2000 thousands, and the universal small gasoline engine becomes the first major country of production. The Chinese universal small gasoline engine products are 60 percent of four-stroke products and 40 percent of two-stroke products, and most products are single-cylinder, air-cooled and carburetor oil supply systems. The yield of 2016 plants in the whole country reaches 2500 million plants, which accounts for 40% of the global yield, the export proportion exceeds 80%, and the major exports are North America, European Union, southeast Asia, Africa, south America and the like.

The small-sized equipment of chain saw and grass cutter is mainly applied to two-stroke gasoline engine, and conventional two-stroke engine is characterized by that on the cylinder body an air inlet, an exhaust outlet and a scavenging port are set, these air ports are opened or closed by means of piston operation, and in the scavenging process the fresh combustible mixed gas for scavenging can be easily mixed with the burnt waste gas, and can be discharged out without combustion or insufficient combustion, so that the two-stroke engine not only has high fuel consumption, but also the tail gas contains lots of Harmful Components (HC), and its influence on atmospheric pollution is obvious. The existing stratified scavenging two-stroke gasoline engine is characterized in that the problem that the emission of the two-stroke engine exceeds the standard is solved by improving the internal structure of the engine and manufacturing a carburetor body into a stratified scavenging structure, the stratified scavenging two-stroke gasoline engine has the characteristics of low emission and low oil consumption, and is favored by consumers.

In the prior art, as shown in fig. 1, a rotary valve type carburetor 100 is used in a two-stroke engine of a handheld lawn mower, and a horizontal partition plate 101 of the structure is designed to make the whole Venturi tube into a single part, is not integrated with a carburetor body, and can be detached. Due to the problem of process manufacturing complexity, only two parallel holes which are parallel to the central hole line of the throttle valve up and down can be made, and the straight hole of the straight-through Venturi tube is made into two parallel holes up and down.

In the prior art, a hand-held two-stroke gasoline engine of a chain saw uses a butterfly valve type carburetor, as shown in fig. 2, an inserted inclined partition plate 201 is installed in a butterfly valve type carburetor main body 200 at the throat position of a venturi tube through an insertion groove, and the inclined partition plate 201 performs layered scavenging treatment on intake air.

The partition plates used for air intake layering in the prior art are all in the form of parts independent from the carburetor main body, and have the defects of high processing difficulty, easy damage and poor stability.

Therefore, how to provide a stratified scavenging carburetor body to solve the above-mentioned drawbacks is a technical problem that needs to be solved by those skilled in the art.

SUMMERY OF THE UTILITY MODEL

The utility model aims at providing a layering scavenging carburetor body, the oblique baffle and the carburetor body integrated into one piece of layering usefulness have reduced the processing cost, and stability is better moreover.

In view of this, the utility model provides a layering scavenging carburetor body, including the carburetor body, the last inlet channel who is provided with the venturi form of carburetor body is provided with oblique baffle in venturi throat department, oblique baffle slope setting and both ends integrated into one piece fixed connection to in the venturi inner wall, oblique baffle lower surface with the inner wall encloses synthetic gas mixture passageway under the venturi to one side, oblique baffle upper surface with synthetic air passageway is enclosed to the upper inner wall of venturi to one side.

The utility model has the advantages that: the air inlet channel is divided into the mixed gas channel and the air channel through the inclined partition plate, so that the air inlet channel has a scavenging function, fresh air firstly scavenges through the air channel and enters the air cylinder during scavenging, combustible mixed gas scavenges through the mixed gas channel and enters the air cylinder, escape of unburned combustible mixed gas is greatly reduced, and pollutant emission is improved; meanwhile, the carburetor body and the inclined partition plate are integrally formed, the number of parts is reduced, the cost is reduced, the fault rate is reduced due to the fact that the matching assembly requirements among the parts are not met, the stability of the carburetor is improved, and the service life of the carburetor is prolonged.

Furthermore, the inclined angle of the inclined partition plate is consistent with the angle of the choke valve shafts on the two sides of the carburetor body.

Further, the lower surface of the inclined partition plate is a downward convex arc surface, and the downward convex arc surface is a downward convex arc surface.

Furthermore, the upper surface of the inclined partition board is an arc concave surface, and a groove is formed in the front end, facing the air inlet, of the arc concave surface.

Furthermore, the slot is arranged in the middle of the front end of the arc concave surface, and the slot is narrow in front and wide in back.

Furthermore, a gap is arranged in the middle of the rear end of the inclined partition plate facing the air outlet.

Drawings

In order to more clearly illustrate the embodiments of the present invention or the technical solutions in the prior art, the drawings required to be used in the description of the embodiments or the prior art will be briefly described below, it is obvious that the drawings in the following description are only embodiments of the present invention, and for those skilled in the art, other drawings can be obtained according to the provided drawings without creative efforts.

FIG. 1 is a schematic view of a prior art rotary valve carburetor;

FIG. 2 is a schematic view of a prior art butterfly valve carburetor body;

FIG. 3 is a schematic perspective view of the layered scavenging carburetor of the present invention;

FIG. 4 is a schematic view of the layered scavenging carburetor of the present invention;

FIG. 5 is a schematic diagram of the structure of the layered scavenging carburetor body according to the present invention;

FIG. 6 is a schematic sectional view taken along line A-A in FIG. 4;

FIG. 7 is a schematic sectional view of B-B in FIG. 4.

The carburetor comprises a carburetor body 1, an inclined partition plate 2, a lower convex cambered surface 21, a notch 22, a notch 23, a mixed gas channel 3, an air channel 4, a rotary valve carburetor 100, a horizontal partition plate 101, a butterfly valve type carburetor main body 200 and an inserted inclined partition plate 201.

Detailed Description

The core of the utility model is to provide a layering scavenging carburetor body, the oblique baffle and the carburetor body integrated into one piece of layering usefulness have reduced the processing cost, and stability is better moreover.

The technical solutions in the embodiments of the present invention will be described clearly and completely with reference to the accompanying drawings in the embodiments of the present invention, and it is obvious that the described embodiments are only some embodiments of the present invention, not all embodiments. Based on the embodiments in the present invention, all other embodiments obtained by a person skilled in the art without creative work belong to the protection scope of the present invention.

Referring to the drawings, FIG. 1 is a schematic diagram of a prior art rotary valve carburetor; FIG. 2 is a schematic view of a prior art butterfly valve carburetor body; FIG. 3 is a schematic perspective view of the layered scavenging carburetor of the present invention; FIG. 4 is a schematic view of the layered scavenging carburetor of the present invention; FIG. 5 is a schematic diagram of the structure of the layered scavenging carburetor body according to the present invention; FIG. 6 is a schematic sectional view taken along line A-A in FIG. 4; FIG. 7 is a schematic sectional view of B-B in FIG. 4.

In the description of the present invention, it is to be understood that the terms "upper", "lower", "front", "rear", "left", "right", "top", "bottom", "inner", "outer", and the like indicate orientations or positional relationships based on the orientations or positional relationships shown in the drawings, and are only for convenience of description and simplicity of description, and do not indicate or imply that the device or element being referred to must have a particular orientation, be constructed and operated in a particular orientation, and therefore, should not be construed as limiting the present invention.

In a specific embodiment, as shown in fig. 3 to 5, a layered scavenging carburetor body comprises a carburetor body 1, wherein an air inlet channel in the form of a venturi tube is arranged on the carburetor body 1, an inclined partition plate 2 is arranged at the throat of the venturi tube, the inclined partition plate 2 is obliquely arranged, two ends of the inclined partition plate are fixedly connected to the inner wall of the venturi tube, and the carburetor body 1 and the inclined partition plate 2 are integrally formed by a die-casting process. The lower surface of the inclined partition plate 2 and the inclined lower inner wall of the Venturi tube enclose a mixed gas channel 3, an oil nozzle is arranged on the inclined lower inner wall of the Venturi tube, and fuel oil is sprayed out of the mixed gas channel 3 by the oil nozzle; the upper surface of the inclined clapboard 2 and the inclined upper inner wall of the Venturi tube enclose a synthetic air channel 4.

The air inlet channel is divided into the mixed gas channel 3 and the air channel 4 through the inclined partition plate 2, so that the air inlet channel has a scavenging function, fresh air firstly scavenges through the air channel 4 and enters the cylinder during scavenging, combustible mixed gas scavenges through the mixed gas channel 3 and enters the cylinder, escape of unburned combustible mixed gas is greatly reduced, and pollutant emission is improved; meanwhile, the carburetor body 1 and the inclined partition plate 2 are integrally formed, so that the number of parts is reduced, the cost is reduced, the fault rate is reduced due to the fact that the matching assembly requirements among the parts are not met, the stability of the carburetor is improved, and the service life of the carburetor is prolonged.

In an embodiment of the present invention, as shown in fig. 3 to 7, the layered scavenging carburetor body of the present invention is applied to a double-through-hole butterfly valve type carburetor, and a butterfly valve is used as a choke valve on both sides of the carburetor body 1. The inclined angle of the inclined partition plate 2 is consistent with the angle of the choke valve shafts on the two sides of the carburetor body 1.

The setting that the inclination through oblique baffle 2 and the angle of choke valve door axle are unanimous is convenient for air inlet direction is corresponding with gas mixture passageway 3 and air passage 4 when the choke valve is opened, and it is smooth and easy to admit air, has improved the efficiency of admitting air. And the appearance and the connection mode of the layered scavenging carburetor body are consistent with those of a common butterfly valve type carburetor, so that the layered scavenging carburetor is convenient to replace and install.

In a specific embodiment of the present invention, as shown in fig. 4 to 6, the lower surface of the inclined partition plate 2 is a lower convex arc surface 21, and the lower convex arc surface 21 is a downward convex arc surface.

Through protruding cambered surface 21 and venturi oblique lower inner wall enclose synthetic new necking down horn mouth form down, be convenient for increase the velocity of flow through the air in the gas mixture passageway 3, reduce atmospheric pressure, the fuel sprayer of being convenient for sprays the fuel, produces turbulent effect moreover, the fuel of being convenient for and air misce bene.

In a specific embodiment of the present invention, as shown in fig. 3, 5, 6 and 7, the upper surface of the inclined partition plate 2 is a circular arc concave surface, and the circular arc concave surface is provided with a slot 23 toward the front end of the air inlet.

Specifically, as shown in fig. 5 and 7, the open groove 23 is provided at the middle of the front end of the arc concave surface, and the open groove 23 is narrow in the front and wide in the rear.

The upper surface of the inclined partition plate 2 is set to be a circular arc concave surface, so that the sectional area of the air channel 4 can be increased, the blocking is reduced, and the fresh air convenient to pass through the air channel 4 enters the cylinder in advance when being scavenged. The arrangement of the slots 23 with narrow front and wide back is convenient for diffusing and guiding fresh air, and reduces blockage.

The inclined partition board 2 is provided with breach 22 towards the rear end intermediate position of gas outlet, and is obvious, and breach 22 sets up to C type breach in the drawing, can not regard as right the utility model discloses a restriction adopts changes such as convex breach or triangle-shaped breach, all falls into among the protection scope.

Through the arrangement of the notch 22, the screw on the choke valve is convenient to avoid, the protruding part of the opening and closing screw of the choke valve needs to be avoided, and the choke valve is prevented from rotating.

The embodiments in the present description are described in a progressive manner, each embodiment focuses on differences from other embodiments, and the same and similar parts among the embodiments are referred to each other. The device disclosed by the embodiment corresponds to the method disclosed by the embodiment, so that the description is simple, and the relevant points can be referred to the method part for description.

The previous description of the disclosed embodiments is provided to enable any person skilled in the art to make or use the present invention. Various modifications to these embodiments will be readily apparent to those skilled in the art, and the generic principles defined herein may be applied to other embodiments without departing from the spirit or scope of the invention. Thus, the present invention is not intended to be limited to the embodiments shown herein but is to be accorded the widest scope consistent with the principles and novel features disclosed herein.

Claims

1. The layered scavenging carburetor body comprises a carburetor body (1), wherein an air inlet channel in a Venturi tube form is arranged on the carburetor body (1), and an inclined partition plate (2) is arranged at the throat of the Venturi tube, and is characterized in that the inclined partition plate (2) is obliquely arranged, two ends of the inclined partition plate are integrally formed and fixedly connected to the inner wall of the Venturi tube, a mixed gas channel (3) is enclosed by the lower surface of the inclined partition plate (2) and the inclined lower inner wall of the Venturi tube, and a synthetic air channel (4) is enclosed by the upper surface of the inclined partition plate (2) and the inclined upper inner wall of the Venturi tube.

2. A stratified scavenging carburetor body according to claim 1, characterized in that the angle of inclination of the slanted partition (2) coincides with the angle of the choke valve shaft on both sides of the carburetor body (1).

3. The stratified scavenging carburetor body according to claim 2, wherein the lower surface of the swash plate (2) is a downward convex arc surface (21), and the downward convex arc surface (21) is provided as a downward convex arc surface.

4. A stratified scavenging carburetor body according to claim 3, wherein the upper surface of the swash plate (2) is a concave arc surface provided with a notch (23) toward the front end of the intake port.

5. The stratified scavenging carburetor body according to claim 4, wherein the notch (23) is provided at a position intermediate to the front end of the circular-arc concave surface, and the notch (23) is provided so as to be narrow in front and wide in rear.

6. A stratified scavenging carburetor body according to any one of claims 1 to 5, characterized in that the swash plate (2) is provided with a notch (22) at a position intermediate the rear end thereof facing the outlet.