阅读说明：本技术 一种汽车加油管用空气导管及其制造方法 (Air guide pipe for automobile refueling pipe and manufacturing method thereof ) 是由 姜志明 于 2019-11-26 设计创作，主要内容包括：本发明公开的一种汽车加油管用空气导管,包括用于连接加油管和碳罐的碳罐通气钢管,碳罐通气钢管为连续的整体结构,碳罐通气钢管的两端均制有第一缩口,第一缩口的根部形成有第一限位环,第一缩口的头部制有第一内缩圆弧；碳罐通气钢管旁沿碳罐通气钢管走向设置有用于连接油箱和灰滤的通气钢管,通气钢管的两端均制有第二缩口,第二缩口的根部形成有第二限位环,第二缩口的头部制有第二内缩圆弧；碳罐通气钢管和通气钢管上焊接固定有第一固定支架和第二固定支架。其制造方法：先制造碳罐通气钢管和通气钢管,并列放置后焊接第一固定支架和第二固定支架,经气密性检查后、清洗、喷涂后入库,加工方法简单,制造成本低。(The invention discloses an air conduit for an automobile refueling pipe, which comprises a carbon tank ventilation steel pipe used for connecting a refueling pipe and a carbon tank, wherein the carbon tank ventilation steel pipe is of a continuous integral structure, two ends of the carbon tank ventilation steel pipe are respectively provided with a first necking, the root of the first necking is provided with a first limiting ring, and the head of the first necking is provided with a first inner necking arc; a ventilation steel pipe for connecting the oil tank and the ash filter is arranged beside the carbon tank ventilation steel pipe along the direction of the carbon tank ventilation steel pipe, second necking is formed at two ends of the ventilation steel pipe, a second limiting ring is formed at the root of each second necking, and a second inward-necking arc is formed at the head of each second necking; and a first fixing support and a second fixing support are welded and fixed on the carbon tank ventilation steel pipe and the ventilation steel pipe. The manufacturing method comprises the following steps: manufacturing a carbon tank ventilation steel pipe and a ventilation steel pipe, welding the first fixing support and the second fixing support after the carbon tank ventilation steel pipe and the ventilation steel pipe are arranged in parallel, and warehousing the carbon tank ventilation steel pipe and the ventilation steel pipe after air tightness inspection, cleaning and spraying.)

1. The utility model provides an air conduit for car refueling pipe, is including the carbon tank steel pipe (1) of ventilating that is used for connecting with oil filling pipe and carbon tank, characterized by: the carbon tank ventilation steel pipe (1) is of a continuous integral structure, first necking mouths (2) are formed at two ends of the carbon tank ventilation steel pipe (1), a first limiting ring (21) is formed at the root parts of the first necking mouths (2), and a first inner necking arc (22) is formed at the head parts of the first necking mouths (2); a ventilation steel pipe (3) used for connecting an oil tank and an ash filter is arranged beside the carbon tank ventilation steel pipe (1) along the direction of the carbon tank ventilation steel pipe (1), the ventilation steel pipe (3) is also of a continuous integral structure, two ends of the ventilation steel pipe (3) are respectively provided with a second necking (4), the root of the second necking (4) is provided with a second limiting ring (41), and the head of the second necking (4) is provided with a second inner-necking arc (42); and a first fixing support (5) and a second fixing support (6) are welded and fixed on the carbon tank ventilation steel pipe (1) and the ventilation steel pipe (3).

2. The air guide pipe for the automobile refueling pipe as recited in claim 1, wherein: the extending end of the first fixing support (5) is bent to form a first fixing plane (51), and a first fixing hole (51a) is formed in the first fixing plane (51).

3. The air guide pipe for the automobile refueling pipe as recited in claim 2, wherein: the first fixing hole (51a) is a circular hole.

4. The air guide pipe for the automobile refueling pipe as recited in claim 3, wherein: two sides of the first fixing bracket (5) are folded to form a first reinforcing edge (52).

5. The air guide pipe for the automobile refueling pipe as recited in claim 4, wherein: the extending end of the second fixing support (6) is bent to form a second fixing plane (61), and a second fixing hole (61a) is formed in the second fixing plane (61).

6. The air guide pipe for the automobile refueling pipe as recited in claim 5, wherein: the second fixing hole (61a) is a kidney-shaped hole.

7. The air guide pipe for the automobile refueling pipe as recited in claim 6, wherein: and two sides of the second fixed bracket (6) are folded to form a second reinforcing edge (62).

8. The air guide pipe for the automobile refueling pipe as recited in claim 7, wherein: the length of the first necking (2) is 26.12mm to 27.12 mm.

9. The air guide pipe for the automobile refueling pipe as recited in claim 8, wherein: the length of the second necking (4) is 20.87mm to 21.37 mm.

10. The method for manufacturing an air guide pipe for an automobile refueling pipe as claimed in claim 1, wherein the method comprises the steps of: the method comprises the following steps:

step one, manufacturing a carbon tank ventilation steel pipe (1): cutting the steel pipe, respectively reducing the two ends of the steel pipe to form a first reducing opening (2), and bending the steel pipe according to a drawing to manufacture a carbon tank ventilation steel pipe (1);

step two, manufacturing a ventilating steel pipe (3): cutting the steel pipe, respectively reducing the two ends of the steel pipe to form a second reducing opening (4), and bending the steel pipe according to a drawing to manufacture a ventilating steel pipe (3);

step three, welding a bracket: placing the carbon tank ventilation steel pipe (1) and the ventilation steel pipe (3) in parallel, and welding and fixing the first fixing support (5) and the second fixing support (6) at corresponding positions on a drawing;

step four, checking air tightness: applying pressure of 0.1MPa to 0.13MPa in the tube, and maintaining the pressure for 5 s;

step five, warehousing: after high-frequency cleaning, the other parts except the first necking (2) and the second necking (4) are subjected to outer surface spraying treatment, and then are packaged and stored in a warehouse.

Technical Field

The invention relates to the field of vehicle accessories, in particular to an air guide pipe for an automobile fuel filling pipe and a manufacturing method thereof.

Background

With the rapid development of the automobile industry in China and the continuous improvement of the living standard of people, cars more and more move into families, and the demand of household cars is increased dramatically. Automobiles are generally fueled by gasoline or diesel fuel and are equipped with fuel tanks, the filler neck of which is provided with a dedicated filler tube for the purpose of facilitating the sealing and filling of the tank.

When some oil filling pipes are filled with fuel, the fuel and return air are all communicated through a pipeline, so that the fuel filling is not smooth enough, and the phenomenon of fuel back choking is easy to occur. The canister is part of a gasoline evaporation control system (EVAP) that was introduced to avoid fuel vapors escaping into the atmosphere after engine shut-down, and since 1995, china mandates that all new delivery vehicles must have this system. After the engine is shut down, gasoline vapor and fresh air are mixed in the tank and stored in the activated carbon tank, after the engine is started, an electromagnetic valve arranged between the activated carbon tank and the air inlet manifold is opened, and the gasoline vapor in the activated carbon tank is brought into the cylinder by clean air under the action of the vacuum degree of the air inlet pipe to participate in combustion. This reduces not only emissions, but also fuel consumption. The existing oil filling pipe is directly connected with the carbon tank, and the installation space of the pipeline in the automobile is narrow, so that troubles are often caused to the design and the manufacture of the oil filling pipe, and the existing oil filling pipe also has an improved space.

Disclosure of Invention

The invention aims to solve the technical problem of the prior art, provides the air guide pipe for the automobile fuel filling pipe, which has simple structure and convenient connection, can effectively prevent fuel oil of the fuel filling pipe from being choked, and has simple manufacturing method and low manufacturing cost.

The technical scheme adopted by the invention for solving the technical problems is as follows:

an air conduit for an automobile refueling pipe comprises a carbon tank ventilation steel pipe used for connecting a refueling pipe and a carbon tank, wherein the carbon tank ventilation steel pipe is of a continuous integral structure, two ends of the carbon tank ventilation steel pipe are respectively provided with a first necking, the root of the first necking is provided with a first limiting ring, and the head of the first necking is provided with a first inner necking arc; a ventilation steel pipe for connecting the oil tank and the ash filter is arranged beside the carbon tank ventilation steel pipe along the direction of the carbon tank ventilation steel pipe, the ventilation steel pipe is also of a continuous integral structure, second necking is formed at two ends of the ventilation steel pipe, a second limiting ring is formed at the root of the second necking, and a second inner-necking arc is formed at the head of the second necking; and a first fixing support and a second fixing support are welded and fixed on the carbon tank ventilation steel pipe and the ventilation steel pipe.

The optimized technical measures further comprise:

the extending end of the first fixing bracket 5 is bent to form a first fixing plane, and the first fixing plane is provided with a first fixing hole.

The first fixing hole is a circular hole.

The two sides of the first fixing support are folded to form a first reinforcing edge.

The extending end of the second fixing support is bent to form a second fixing plane, and a second fixing hole is formed in the second fixing plane.

The second fixing hole is a kidney-shaped hole.

And two sides of the second fixing support are folded to form a second reinforcing edge.

The length of the first necking is 26.12mm to 27.12 mm.

The length of the second necking is 20.87mm to 21.37 mm.

A manufacturing method of an air guide pipe for an automobile refueling pipe comprises the following steps:

step one, manufacturing a carbon tank ventilation steel pipe: cutting a steel pipe, respectively necking the two ends of the steel pipe to form a first necking, and bending the steel pipe according to a drawing to manufacture a carbon tank ventilation steel pipe;

step two, manufacturing a ventilating steel pipe: cutting the steel pipe, respectively reducing the two ends of the steel pipe to form a second reducing, and bending the steel pipe according to a drawing to manufacture a ventilating steel pipe;

step three, welding a bracket: placing the carbon tank ventilation steel pipe and the ventilation steel pipe in parallel, and welding and fixing the first fixing support and the second fixing support at corresponding positions of the drawing;

step four, checking air tightness: applying pressure of 0.1MPa to 0.13MPa in the tube, and maintaining the pressure for 5 s;

step five, warehousing: after high-frequency cleaning, the other parts except the first necking and the second necking are subjected to outer surface spraying treatment, and then are packaged and stored in a warehouse.

The air guide pipe for the automobile refueling pipe is matched with the refueling pipe for use, the carbon tank ventilation steel pipe is connected between the refueling pipe and the carbon tank, the design and the manufacture of the refueling pipe are facilitated, a two-end necking structure is adopted, the connection is convenient, the ventilation steel pipes for connecting an oil tank and a dust filter are arranged beside the carbon tank ventilation steel pipe in parallel, oil gas molecules generated in the refueling process are discharged from the ventilation steel pipe, the phenomenon of fuel back choke in the fuel refueling process is solved, the fuel refueling is smooth, and the ventilation steel pipe is also provided with a two-end necking structure, so that the connection is convenient; and the arrangement of the first fixing support and the second fixing support facilitates the fixation of the air conduit in the narrow space of the automobile.

The manufacturing method of the air guide pipe for the automobile refueling pipe adopts the design of necking, bending and welding the fixing bracket, and has the advantages of simple and convenient processing and low manufacturing cost.

Drawings

FIG. 1 is a schematic perspective view of the present invention;

FIG. 2 is an enlarged view of portion A of FIG. 1;

FIG. 3 is an enlarged view of portion B of FIG. 1;

FIG. 4 is a schematic view of the first throat of FIG. 1;

fig. 5 is a schematic view of the second throat of fig. 1.

Detailed Description

The invention is described in further detail below with reference to the accompanying examples.

As shown in fig. 1 to 5, which are schematic structural views of the present invention,

wherein the reference numerals are: the carbon tank ventilation steel pipe comprises a carbon tank ventilation steel pipe 1, a first necking 2, a first limiting ring 21, a first inner-shrinking arc 22, a ventilation steel pipe 3, a second necking 4, a second limiting ring 41, a second inner-shrinking arc 42, a first fixing support 5, a first fixing plane 51, a first fixing hole 51a, a first reinforcing edge 52, a second fixing support 6, a second fixing plane 61, a second fixing hole 61a and a second reinforcing edge 62.

As shown in figures 1 to 5 of the drawings,

an air conduit for an automobile refueling pipe comprises a carbon tank ventilation steel pipe 1 used for connecting a refueling pipe and a carbon tank, wherein the carbon tank ventilation steel pipe 1 is of a continuous integral structure, first necking ports 2 are formed at two ends of the carbon tank ventilation steel pipe 1, a first limiting ring 21 is formed at the root of each first necking port 2, and a first inward-necking circular arc 22 is formed at the head of each first necking port 2; a ventilation steel pipe 3 for connecting an oil tank and an ash filter is arranged beside the carbon tank ventilation steel pipe 1 along the direction of the carbon tank ventilation steel pipe 1, the ventilation steel pipe 3 is also of a continuous integral structure, second necking mouths 4 are formed at two ends of the ventilation steel pipe 3, a second limiting ring 41 is formed at the root parts of the second necking mouths 4, and second inward-necking circular arcs 42 are formed at the head parts of the second necking mouths 4; and a first fixing support 5 and a second fixing support 6 are welded and fixed on the carbon tank ventilation steel pipe 1 and the ventilation steel pipe 3.

The diameter of the carbon tank ventilation steel pipe 1 is larger than that of the ventilation steel pipe 3.